Sensor nodes are highly mobile, which makes the application running on them face network related problems like node failure, link failure, network level disconnection, scarcity of resources etc. Node failure and Network fault are need to be monitored continuously by supervising the network status especially for critical applications like Health Monitoring System. We propose Node Monitoring protocol (NMP) to monitor the node good conditions using agents and ensure that node gets promised quality of service. These Nodes senses environment and communicates important data to the sink or base station. To establish the correct event time, these nodes need to be synchronized with global clock. Therefore, time synchronization is very important parameter. We have built a simulating environment for Validating Node Monitoring Protocol (NMP) to assess the reliability of Health Monitoring systems. Formal Specification and Description Language tool (SDL) has been used to validate the NMP at design time in order to increase the confidence and efficiency of the system.
SDL Based Validation of a Node Monitoring Protocol csandit
Mobile ad hoc network is a wireless, self-configured, infrastructure less network of mobile
nodes. The nodes are highly mobile, which makes the application running on them face network
related problems like node failure, link failure, network level disconnection, scarcity of
resources, buffer degradation, and intermittent disconnection etc. Node failure and Network
fault are need to be monitored continuously by supervising the network status. Node monitoring
protocol is crucial, so it is required to test the protocol exhaustively to verify and validate the
functionality and accuracy of the designed protocol. This paper presents a validation model for
Node Monitoring Protocol using Specification and Description L language (SDL) using both
Static Agent (SA) and Mobile Agent (MA). We have verified properties of the Node Monitoring
Protocol (NMP) based on the global states with no exits, deadlock states or proper termination
states using reach ability graph. Message Sequence Chart (MSC) gives an intuitive
understanding of the described system behaviour with varying node density and complex
behaviour etc.
The proposed System for Indoor Location TrackingEditor IJCATR
Indoor location tracking systems are used to locate people or certain objects in buildings and in closed areas. For example,
finding co-workers in a large office building, locating customers within a shopping mall and locating patients in the hospital are a few
applications of indoor location tracking systems. Indoor tracking capability opens up multiple possibilities. To address this need, this
paper describes the implementation of a Bluetooth-based indoor location tracking system that utilizes the integrated Bluetooth modules
in any today's mobile phones to specify and display the location of the individuals in a certain building. The proposed system aims for
location tracking/monitoring and marketing applications for whom want to locate individuals carrying mobile phones and advertise
products and services.
SDL Based Validation of a Node Monitoring Protocol csandit
Mobile ad hoc network is a wireless, self-configured, infrastructure less network of mobile
nodes. The nodes are highly mobile, which makes the application running on them face network
related problems like node failure, link failure, network level disconnection, scarcity of
resources, buffer degradation, and intermittent disconnection etc. Node failure and Network
fault are need to be monitored continuously by supervising the network status. Node monitoring
protocol is crucial, so it is required to test the protocol exhaustively to verify and validate the
functionality and accuracy of the designed protocol. This paper presents a validation model for
Node Monitoring Protocol using Specification and Description L language (SDL) using both
Static Agent (SA) and Mobile Agent (MA). We have verified properties of the Node Monitoring
Protocol (NMP) based on the global states with no exits, deadlock states or proper termination
states using reach ability graph. Message Sequence Chart (MSC) gives an intuitive
understanding of the described system behaviour with varying node density and complex
behaviour etc.
The proposed System for Indoor Location TrackingEditor IJCATR
Indoor location tracking systems are used to locate people or certain objects in buildings and in closed areas. For example,
finding co-workers in a large office building, locating customers within a shopping mall and locating patients in the hospital are a few
applications of indoor location tracking systems. Indoor tracking capability opens up multiple possibilities. To address this need, this
paper describes the implementation of a Bluetooth-based indoor location tracking system that utilizes the integrated Bluetooth modules
in any today's mobile phones to specify and display the location of the individuals in a certain building. The proposed system aims for
location tracking/monitoring and marketing applications for whom want to locate individuals carrying mobile phones and advertise
products and services.
Research on Power Quality Real-Time Monitoring System For High Voltage Switch...IJRESJOURNAL
ABSTRACT: As an important equipment of high voltage switch cabinet distribution plays a key role in the power system of power generation, transmission and distribution of electricity, and monitoring the operation of electrical parameters, based on virtual instrument technology, make full use of the data processing, data analysis, data expression and network function and other advantages, build a set based on the LabVIEW real-time power quality monitoring system innovatively applied in high-voltage switch cabinet. Through building a power quality monitoring platform based on high voltage switchgear in the laboratory, the accuracy of the system measurement is verified. The experimental results show that the design of power quality real-time monitoring system has good performance, high accuracy, friendly interface, and has a good market prospect.
Controller selection in software defined networks using best-worst multi-crit...journalBEEI
Controllers are the key component of Software-defined Network (SDN) architecture. Given the diversity of open SDN controllers, the following question arises for the network administrators: How can we choose the appropriate SDN controller? Different characteristics of the controllers have greatly increased the complexity of the right decision. Multi-Criteria Decision-making Methods (MCDMs) is a family of robust mathematical tools to address complex problems regarding multiple objectives. In this paper, we study the most important features of SDN controllers. To this end, we compare the well-known SDN controllers including NOX, POX, Beacon, Floodlight, Ryu, ODL, and ONOS. Leveraging a novel MCDM technique called the Best–Worst Multi-criteria (BWM), we find the most appropriate SDN controller. We solve an optimization problem and evaluate its performance in terms of significant criteria such as throughput and latency. Initial evaluation revealed that the ONOS and ODL have the highest throughput, while the lowest throughputs belong to the NOX, POX, and Ryu. However, final evaluation concerning all criteria confirmed the robustness of the ONOS and the ODL compared to other controllers.
International Journal of Computational Engineering Research(IJCER)ijceronline
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology.
HOST AND NETWORK SECURITY by ThesisScientist.comProf Ansari
Network management means different things to different people. In some cases, it involves a solitary network consultant monitoring network activity with an outdated protocol analyzer. In other cases, network management involves a distributed database, auto polling of network devices, and high-end workstations generating real-time graphical views of network topology changes and traffic. In general, network management is a service that employs a variety of tools, applications, and devices to assist human network managers in monitoring and maintaining networks.
Design and Implementation of monitoring LAN user wirelessly by Android mobile...theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
In this paper, an application-based QoS evaluation approach for heterogeneous networks is proposed.It is possible to expand the network capacity and coverage in a dynamic fashion by applying heterogeneous wireless network architecture. However, the Quality of Service (QoS) evaluation of this type of network architecture is very challenging due to the presence of different communication technologies. Different communication technologies have different characteristics and the applications that utilize them have unique QoS requirements. Although, the communication technologies have different performance measurement parameters, the applications using these radio access networks have the same QoS requirements. As a result, it would be easier to evaluate the QoS of the access networks and the overall network configuration based on the performance of applications running on them. Using such applicationbased QoS evaluation approach, the heterogeneous nature of the underlying networks and the diversity of their traffic can be adequately taken into account. Through simulation studies, we show that the application performance based assessment approach facilitates better QoS management and monitoring of heterogeneous network configurations.
Advancements in Complementary Metal Oxide Semiconductor (CMOS) technology have enabled Wireless Sensor Networks (WSN) to gather, process and transport multimedia (MM) data as well and not just limited to handling ordinary scalar data anymore. This new generation of WSN type is called Wireless Multimedia Sensor Networks (WMSNs). Better and yet relatively cheaper sensors – sensors that are able to sense both scalar data and multimedia data with more advanced functionalities such as being able to handle rather intense computations easily - have sprung up. In this paper, the applications, architectures, challenges and issues faced in the design of WMSNs are explored. Security and privacy issues, over all requirements, proposed and implemented solutions so far, some of the successful achievements and other related works in the field are also highlighted. Open research areas are pointed out and a few solution suggestions to the still persistent problems are made, which, to the best of my knowledge, so far haven’t been explored yet.
A NOVEL METHOD TO TEST DEPENDABLE COMPOSED SERVICE COMPONENTSIJCNCJournal
Assessing Web service systems performance and their dependability are crucial for the development of
today’s applications. Testing the performance and Fault Tolerance Mechanisms (FTMs) of composed
service components is hard to be measured at design time due to service instability is often caused by the
nature of the network conditions. Using a real internet environment for testing systems is difficult to set up
and control. We have introduced a fault injection toolkit that emulates a WAN within a LAN environment
between composed service components and offers full control over the emulated environment in addition to
the capability to inject network-related faults and application specific faults. The toolkit also generates
background workloads on the system under test so as to produce more realistic results. We describe an
experiment that has been performed to examine the impact of fault tolerance protocols deployed at a
service client by using our toolkit system.
Maximizing network interruption in wirelessIJCNCJournal
With the colossal growth of wireless sensor networks (WSNs) in different applications starting from home
automation to military affairs, the pressure on ensuring security in such a network is paramount.
Considering the security challenges, it is really a hard-hitting effort to develop a secured WSN system.
Moreover, as the information technology is getting popular, the intruders are also planning new ideas to
break the system security, to harm the network and to make the system quality down with the target of
taking the control of the network to corrupt it or to get benefits from it anyway. The intruders corrupt the
system only when the security breaking cost (SBC) is lower compared with the benefits they attained or the
harm it can make to others. In this paper, the authors define the term “maximizing network interruption
problem” and propose a technique, called the grid point approximation algorithm, to estimate the SBC of a
multi-hop WSN so that it can be made tougher for an intruder to break the system security. It is assumed
that the intruder has the complete picture of the entire network. The technique is designed from the
intruder’s point of view for completely jamming all the sensor nodes in the network through placing
jammers or malicious nodes strategically and at the same time keeping the number of jammer nodes to
minimum or near minimum. To the best of the authors’ knowledge, there is no work proposed so far of the
same kind. Experimental results with the changes of the different network parameters show that the
proposed algorithm is able to provide excellent performances to achieve the targets.
ADAPTIVE HANDOVER HYSTERESIS AND CALL ADMISSION CONTROL FOR MOBILE RELAY NODESIJCNCJournal
The aim of equipping a wireless network with a mobile relay node is to support broadband wireless communications for vehicular users and their devices. The high mobility of vehicular users, possibly at a very high velocity in the area in which two cells overlap, could cause the network to suffer from a reduced handover success rate and, hence, increased radio link failure. The combined impact of these problems is service interruptions to vehicular users. Thus, the handover schemes are crucial in solving these problems. In this work, we first present the adaptive handover hysteresis scheme for the wireless network with mobile relay nodes in the high-speed train scenario. Specifically, our proposed adaptive hysteresis scheme is based on the velocity of the train. Second, the handover call dropping probability is reduced by introducing a modified call admission control scheme to support radio resource reservation for handover calls that prioritizes handover calls of mobile relay over the other calls. The proposed solution in which adaptive parameter is combined with call admission control is evaluated by system level simulation. Our simulation results illustrate an increased handover success rate and reduced radio link failures.
A predictive framework for cyber security analytics using attack graphsIJCNCJournal
Security metrics serve as a powerful tool for organizations to understand the effectiveness of protecting computer networks. However majority of these measurement techniques don’t adequately help corporations to make informed risk management decisions. In this paper we present a stochastic security framework for obtaining quantitative measures of security by taking into account the dynamic attributes associated with vulnerabilities that can change over time. Our model is novel as existing research in attack graph analysis do not consider the temporal aspects associated with the vulnerabilities, such as the availability of exploits and patches which can affect the overall network security based on how the vulnerabilities are interconnected and leveraged to compromise the system. In order to have a more realistic representation of how the security state of the network would vary over time, a nonhomogeneous model is developed which incorporates a time dependent covariate, namely the vulnerability age. The daily transition-probability matrices are estimated using Frei's Vulnerability Lifecycle model. We also leverage the trusted CVSS metric domain to analyze how the total exploitability and impact measures evolve over a time period for a given network.
Using spectral radius ratio for node degreeIJCNCJournal
In this paper, we show that the spectral radius ratio for node degree could be used to analyze the variation of node degree during the evolution of complex networks. We focus on three commonly studied models of complex networks: random networks, scale-free networks and small-world networks. The spectral radius ratio for node degree is defined as the ratio of the principal (largest) eigenvalue of the adjacency matrix of a network graph to that of the average node degree. During the evolution of each of the above three categories of networks (using the appropriate evolution model for each category), we observe the spectral radius ratio for node degree to exhibit high-very high positive correlation (0.75 or above) to that of the
coefficient of variation of node degree (ratio of the standard deviation of node degree and average node degree). We show that the spectral radius ratio for node degree could be used as the basis to tune the operating parameters of the evolution models for each of the three categories of complex networks as well as analyze the impact of specific operating parameters for each model.
PERFORMANCE ANALYSIS OF MULTI-PATH TCP NETWORKIJCNCJournal
MPTCP is proposed by IETF working group, it allows a single TCP stream to be split across multiple
paths. It has obvious benefits in performance and reliability. MPTCP has implemented in Linux-based
distributions that can be compiled and installed to be used for both real and experimental scenarios. In this
article, we provide performance analyses for MPTCP with a laptop connected to WiFi access point and 3G
cellular network at the same time. We prove experimentally that MPTCP outperforms regular TCP for
WiFi or 3G interfaces. We also compare four types of congestion control algorithms for MPTCP that are
also implemented in the Linux Kernel. Results show that Alias Linked Increase Congestion Control
algorithm outperforms the others in the normal traffic load while Balanced Linked Adaptation algorithm
outperforms the rest when the paths are shared with heavy traffic, which is not supported by MPTCP.
Peer-to-Peer streaming technology has become one of the major Internet applications as it offers the opportunity of broadcasting high quality video content to a large number of peers with low costs. It is widely accepted that with the efficient utilization of peers and server's upload capacities, peers can enjoy watching a high bit rate video with minimal end-to-end delay. In this paper, we present a practical scheduling algorithm that works in the challenging condition where no spare capacity is available, i.e., it maximally utilizes the resources and broadcasts the maximum streaming rate. Each peer contacts with only a small number of neighbours in the overlay network and autonomously subscribes to sub-streams according to a budget-model in such a way that the number of peers forwarding exactly one sub-stream will be maximized. The hop-count delay is also taken into account to construct a short depth trees. Finally, we show through simulation that peers dynamically converge to an efficient overlay structure with a short hop-count delay. Moreover, the proposed scheme gives nice features in the homogeneous case and overcomes SplitStream in all simulated scenarios.
APPROXIMATING NASH EQUILIBRIUM UNIQUENESS OF POWER CONTROL IN PRACTICAL WSNSIJCNCJournal
Transmission power has a major impact on link and communication reliability and network lifetime in Wireless Sensor Networks. We study power control in a multi-hop Wireless Sensor Network where nodes' communication interfere with each other. Our objective is to determine each node's transmission power level that will reduce the communication interference and keep energy consumption to a minimum. We propose a potential game approach to obtain the unique equilibrium of the network transmission power allocation. The unique equilibrium is located in a continuous domain. However, radio transceivers accept only discrete values for transmission power level setting. We study the viability and performance of mapping the continuous solution from the potential game to the discrete domain required by the radio. We demonstrate the success of our approach through TOSSIM simulation when nodes use the Collection Tree Protocol for routing the data. Also, we show results of our method from the Indriya testbed. We compare it with the case where the motes use Collection Tree Protocol with the maximum transmission power.
As Wireless Sensor Networks are penetrating into the industrial domain, many research opportunities are emerging. One such essential and challenging application is that of node localization. A feed-forward neural network based methodology is adopted in this paper. The Received Signal Strength Indicator (RSSI) values of the anchor node beacons are used. The number of anchor nodes and their configurations has an impact on the accuracy of the localization system, which is also addressed in this paper. Five different training algorithms are evaluated to find the training algorithm that gives the best result. The multi-layer Perceptron (MLP) neural network model was trained using Matlab. In order to evaluate the performance of the proposed method in real time, the model obtained was then implemented on the Arduino microcontroller. With four anchor nodes, an average 2D localization error of 0.2953 m has been achieved with a 12-12-2 neural network structure. The proposed method can also be implemented on any other embedded microcontroller system.
Research on Power Quality Real-Time Monitoring System For High Voltage Switch...IJRESJOURNAL
ABSTRACT: As an important equipment of high voltage switch cabinet distribution plays a key role in the power system of power generation, transmission and distribution of electricity, and monitoring the operation of electrical parameters, based on virtual instrument technology, make full use of the data processing, data analysis, data expression and network function and other advantages, build a set based on the LabVIEW real-time power quality monitoring system innovatively applied in high-voltage switch cabinet. Through building a power quality monitoring platform based on high voltage switchgear in the laboratory, the accuracy of the system measurement is verified. The experimental results show that the design of power quality real-time monitoring system has good performance, high accuracy, friendly interface, and has a good market prospect.
Controller selection in software defined networks using best-worst multi-crit...journalBEEI
Controllers are the key component of Software-defined Network (SDN) architecture. Given the diversity of open SDN controllers, the following question arises for the network administrators: How can we choose the appropriate SDN controller? Different characteristics of the controllers have greatly increased the complexity of the right decision. Multi-Criteria Decision-making Methods (MCDMs) is a family of robust mathematical tools to address complex problems regarding multiple objectives. In this paper, we study the most important features of SDN controllers. To this end, we compare the well-known SDN controllers including NOX, POX, Beacon, Floodlight, Ryu, ODL, and ONOS. Leveraging a novel MCDM technique called the Best–Worst Multi-criteria (BWM), we find the most appropriate SDN controller. We solve an optimization problem and evaluate its performance in terms of significant criteria such as throughput and latency. Initial evaluation revealed that the ONOS and ODL have the highest throughput, while the lowest throughputs belong to the NOX, POX, and Ryu. However, final evaluation concerning all criteria confirmed the robustness of the ONOS and the ODL compared to other controllers.
International Journal of Computational Engineering Research(IJCER)ijceronline
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology.
HOST AND NETWORK SECURITY by ThesisScientist.comProf Ansari
Network management means different things to different people. In some cases, it involves a solitary network consultant monitoring network activity with an outdated protocol analyzer. In other cases, network management involves a distributed database, auto polling of network devices, and high-end workstations generating real-time graphical views of network topology changes and traffic. In general, network management is a service that employs a variety of tools, applications, and devices to assist human network managers in monitoring and maintaining networks.
Design and Implementation of monitoring LAN user wirelessly by Android mobile...theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
In this paper, an application-based QoS evaluation approach for heterogeneous networks is proposed.It is possible to expand the network capacity and coverage in a dynamic fashion by applying heterogeneous wireless network architecture. However, the Quality of Service (QoS) evaluation of this type of network architecture is very challenging due to the presence of different communication technologies. Different communication technologies have different characteristics and the applications that utilize them have unique QoS requirements. Although, the communication technologies have different performance measurement parameters, the applications using these radio access networks have the same QoS requirements. As a result, it would be easier to evaluate the QoS of the access networks and the overall network configuration based on the performance of applications running on them. Using such applicationbased QoS evaluation approach, the heterogeneous nature of the underlying networks and the diversity of their traffic can be adequately taken into account. Through simulation studies, we show that the application performance based assessment approach facilitates better QoS management and monitoring of heterogeneous network configurations.
Advancements in Complementary Metal Oxide Semiconductor (CMOS) technology have enabled Wireless Sensor Networks (WSN) to gather, process and transport multimedia (MM) data as well and not just limited to handling ordinary scalar data anymore. This new generation of WSN type is called Wireless Multimedia Sensor Networks (WMSNs). Better and yet relatively cheaper sensors – sensors that are able to sense both scalar data and multimedia data with more advanced functionalities such as being able to handle rather intense computations easily - have sprung up. In this paper, the applications, architectures, challenges and issues faced in the design of WMSNs are explored. Security and privacy issues, over all requirements, proposed and implemented solutions so far, some of the successful achievements and other related works in the field are also highlighted. Open research areas are pointed out and a few solution suggestions to the still persistent problems are made, which, to the best of my knowledge, so far haven’t been explored yet.
A NOVEL METHOD TO TEST DEPENDABLE COMPOSED SERVICE COMPONENTSIJCNCJournal
Assessing Web service systems performance and their dependability are crucial for the development of
today’s applications. Testing the performance and Fault Tolerance Mechanisms (FTMs) of composed
service components is hard to be measured at design time due to service instability is often caused by the
nature of the network conditions. Using a real internet environment for testing systems is difficult to set up
and control. We have introduced a fault injection toolkit that emulates a WAN within a LAN environment
between composed service components and offers full control over the emulated environment in addition to
the capability to inject network-related faults and application specific faults. The toolkit also generates
background workloads on the system under test so as to produce more realistic results. We describe an
experiment that has been performed to examine the impact of fault tolerance protocols deployed at a
service client by using our toolkit system.
Maximizing network interruption in wirelessIJCNCJournal
With the colossal growth of wireless sensor networks (WSNs) in different applications starting from home
automation to military affairs, the pressure on ensuring security in such a network is paramount.
Considering the security challenges, it is really a hard-hitting effort to develop a secured WSN system.
Moreover, as the information technology is getting popular, the intruders are also planning new ideas to
break the system security, to harm the network and to make the system quality down with the target of
taking the control of the network to corrupt it or to get benefits from it anyway. The intruders corrupt the
system only when the security breaking cost (SBC) is lower compared with the benefits they attained or the
harm it can make to others. In this paper, the authors define the term “maximizing network interruption
problem” and propose a technique, called the grid point approximation algorithm, to estimate the SBC of a
multi-hop WSN so that it can be made tougher for an intruder to break the system security. It is assumed
that the intruder has the complete picture of the entire network. The technique is designed from the
intruder’s point of view for completely jamming all the sensor nodes in the network through placing
jammers or malicious nodes strategically and at the same time keeping the number of jammer nodes to
minimum or near minimum. To the best of the authors’ knowledge, there is no work proposed so far of the
same kind. Experimental results with the changes of the different network parameters show that the
proposed algorithm is able to provide excellent performances to achieve the targets.
ADAPTIVE HANDOVER HYSTERESIS AND CALL ADMISSION CONTROL FOR MOBILE RELAY NODESIJCNCJournal
The aim of equipping a wireless network with a mobile relay node is to support broadband wireless communications for vehicular users and their devices. The high mobility of vehicular users, possibly at a very high velocity in the area in which two cells overlap, could cause the network to suffer from a reduced handover success rate and, hence, increased radio link failure. The combined impact of these problems is service interruptions to vehicular users. Thus, the handover schemes are crucial in solving these problems. In this work, we first present the adaptive handover hysteresis scheme for the wireless network with mobile relay nodes in the high-speed train scenario. Specifically, our proposed adaptive hysteresis scheme is based on the velocity of the train. Second, the handover call dropping probability is reduced by introducing a modified call admission control scheme to support radio resource reservation for handover calls that prioritizes handover calls of mobile relay over the other calls. The proposed solution in which adaptive parameter is combined with call admission control is evaluated by system level simulation. Our simulation results illustrate an increased handover success rate and reduced radio link failures.
A predictive framework for cyber security analytics using attack graphsIJCNCJournal
Security metrics serve as a powerful tool for organizations to understand the effectiveness of protecting computer networks. However majority of these measurement techniques don’t adequately help corporations to make informed risk management decisions. In this paper we present a stochastic security framework for obtaining quantitative measures of security by taking into account the dynamic attributes associated with vulnerabilities that can change over time. Our model is novel as existing research in attack graph analysis do not consider the temporal aspects associated with the vulnerabilities, such as the availability of exploits and patches which can affect the overall network security based on how the vulnerabilities are interconnected and leveraged to compromise the system. In order to have a more realistic representation of how the security state of the network would vary over time, a nonhomogeneous model is developed which incorporates a time dependent covariate, namely the vulnerability age. The daily transition-probability matrices are estimated using Frei's Vulnerability Lifecycle model. We also leverage the trusted CVSS metric domain to analyze how the total exploitability and impact measures evolve over a time period for a given network.
Using spectral radius ratio for node degreeIJCNCJournal
In this paper, we show that the spectral radius ratio for node degree could be used to analyze the variation of node degree during the evolution of complex networks. We focus on three commonly studied models of complex networks: random networks, scale-free networks and small-world networks. The spectral radius ratio for node degree is defined as the ratio of the principal (largest) eigenvalue of the adjacency matrix of a network graph to that of the average node degree. During the evolution of each of the above three categories of networks (using the appropriate evolution model for each category), we observe the spectral radius ratio for node degree to exhibit high-very high positive correlation (0.75 or above) to that of the
coefficient of variation of node degree (ratio of the standard deviation of node degree and average node degree). We show that the spectral radius ratio for node degree could be used as the basis to tune the operating parameters of the evolution models for each of the three categories of complex networks as well as analyze the impact of specific operating parameters for each model.
PERFORMANCE ANALYSIS OF MULTI-PATH TCP NETWORKIJCNCJournal
MPTCP is proposed by IETF working group, it allows a single TCP stream to be split across multiple
paths. It has obvious benefits in performance and reliability. MPTCP has implemented in Linux-based
distributions that can be compiled and installed to be used for both real and experimental scenarios. In this
article, we provide performance analyses for MPTCP with a laptop connected to WiFi access point and 3G
cellular network at the same time. We prove experimentally that MPTCP outperforms regular TCP for
WiFi or 3G interfaces. We also compare four types of congestion control algorithms for MPTCP that are
also implemented in the Linux Kernel. Results show that Alias Linked Increase Congestion Control
algorithm outperforms the others in the normal traffic load while Balanced Linked Adaptation algorithm
outperforms the rest when the paths are shared with heavy traffic, which is not supported by MPTCP.
Peer-to-Peer streaming technology has become one of the major Internet applications as it offers the opportunity of broadcasting high quality video content to a large number of peers with low costs. It is widely accepted that with the efficient utilization of peers and server's upload capacities, peers can enjoy watching a high bit rate video with minimal end-to-end delay. In this paper, we present a practical scheduling algorithm that works in the challenging condition where no spare capacity is available, i.e., it maximally utilizes the resources and broadcasts the maximum streaming rate. Each peer contacts with only a small number of neighbours in the overlay network and autonomously subscribes to sub-streams according to a budget-model in such a way that the number of peers forwarding exactly one sub-stream will be maximized. The hop-count delay is also taken into account to construct a short depth trees. Finally, we show through simulation that peers dynamically converge to an efficient overlay structure with a short hop-count delay. Moreover, the proposed scheme gives nice features in the homogeneous case and overcomes SplitStream in all simulated scenarios.
APPROXIMATING NASH EQUILIBRIUM UNIQUENESS OF POWER CONTROL IN PRACTICAL WSNSIJCNCJournal
Transmission power has a major impact on link and communication reliability and network lifetime in Wireless Sensor Networks. We study power control in a multi-hop Wireless Sensor Network where nodes' communication interfere with each other. Our objective is to determine each node's transmission power level that will reduce the communication interference and keep energy consumption to a minimum. We propose a potential game approach to obtain the unique equilibrium of the network transmission power allocation. The unique equilibrium is located in a continuous domain. However, radio transceivers accept only discrete values for transmission power level setting. We study the viability and performance of mapping the continuous solution from the potential game to the discrete domain required by the radio. We demonstrate the success of our approach through TOSSIM simulation when nodes use the Collection Tree Protocol for routing the data. Also, we show results of our method from the Indriya testbed. We compare it with the case where the motes use Collection Tree Protocol with the maximum transmission power.
As Wireless Sensor Networks are penetrating into the industrial domain, many research opportunities are emerging. One such essential and challenging application is that of node localization. A feed-forward neural network based methodology is adopted in this paper. The Received Signal Strength Indicator (RSSI) values of the anchor node beacons are used. The number of anchor nodes and their configurations has an impact on the accuracy of the localization system, which is also addressed in this paper. Five different training algorithms are evaluated to find the training algorithm that gives the best result. The multi-layer Perceptron (MLP) neural network model was trained using Matlab. In order to evaluate the performance of the proposed method in real time, the model obtained was then implemented on the Arduino microcontroller. With four anchor nodes, an average 2D localization error of 0.2953 m has been achieved with a 12-12-2 neural network structure. The proposed method can also be implemented on any other embedded microcontroller system.
PERFORMANCE EVALUATION OF WIRELESS SENSOR NETWORK UNDER HELLO FLOOD ATTACKIJCNCJournal
Wireless sensor network (WSN) is highly used in many fields. The network consists of tiny lightweight
sensor nodes and is largely used to scan or detect or monitor environments. Since these sensor nodes are
tiny and lightweight, they put some limitations on resources such as usage of power, processing given task,
radio frequency range. These limitations allow network vulnerable to many different types of attacks such
as hello flood attack, black hole, Sybil attack, sinkhole, and many more. Among these attacks, hello flood is
one of the most important attacks. In this paper,we have analyzed the performance of hello flood attack and
compared the network performance as number of attackers increases. Network performance is evaluated
by modifying the ad-hoc on demand distance vector (AODV) routing protocol by using NS2 simulator. It
has been tested under different scenarios like no attacker, single attacker, and multiple attackers to know
how the network performance changes. The simulation results show that as the number of attackers
increases the performance in terms of throughput and delay changes.
On the approximation of the sum of lognormals by a log skew normal distributionIJCNCJournal
Several methods have been proposed to approximate the sum of lognormal RVs. However the accuracy of each method relies highly on the region of the resulting distribution being examined, and the individual lognormal parameters, i.e., mean and variance. There is no such method which can provide the needed accuracy for all cases. This paper propose a universal yet very simple approximation method for the sum of Lognormals based on log skew normal approximation. The main contribution on this work is to propose an analytical method for log skew normal parameters estimation. The proposed method provides highly accurate approximation to the sum of lognormal distributions over the whole range of dB spreads for any correlation coefficient. Simulation results show that our method outperforms all previously proposed methods and provides an accuracy within 0.01 dB for all cases.
PERFORMANCE ANALYSIS OF THE LINK-ADAPTIVE COOPERATIVE AMPLIFY-AND-FORWARD REL...IJCNCJournal
This paper analyzes the performance of cooperative amplify-and-forward (CAF) relay networks that
employ adaptive M-ary quadrature amplitude modulation (M-QAM)/M-ary phase shift keying (M-PSK)
digital modulation techniques in Nakagami-m fading channel. In particular, we present and compared the
analysis of CAF relay networks with different cooperative diversity and opportunistic routing strategies
such as regular Maximal Ratio Combining (MRC), Selection Diversity Combining (SDC), Opportunistic
Relay Selection with Maximal Ratio Combining (ORS-MRC) and Opportunistic Relay Selection with
Selection Diversity Combining (ORS-SDC). We advocate a simple yet unified numerical approach based on
the marginal moment generating function (MGF) of the total received SNR to compute the average symbol
error rate (ASER), mean achievable spectral efficiency, and outage probability performance metrics.
HIDING A MESSAGE IN MP3 USING LSB WITH 1, 2, 3 AND 4 BITSIJCNCJournal
Steganography is the art of hiding information in ways that prevent the detection of hidden messages. This
paper presentsa new method which randomly selects position in MP3 file to hide a text secret messageby
using Least Significant Bit (LSB) technique. The text secret message isused in start and ends locations a
unique signature or key.The methodology focuses to embed one bit, two bits, three bitsor four bits from
secret message into MP3 file by using LSB techniques. The evaluation and performancemethods are based
on robustness (BER and correlation), Imperceptibility (PSNR) and hiding capacity (Ratio between Sizes of
text message and MP3 Cover) indicators.The experimental results show the new method is more security.
Moreover the contribution of this paper is the provision of a robustness-based classification of LSB
steganography models depending on their occurrence in the embedding position.
These days considering expansion of networks, dissemination of information has become one of significant cases for researchers. In social networks in addition to social structures and people effectiveness on each other, Profit increase of sales, publishing a news or rumor, spread or diffusion of an idea can be mentioned. In social societies, people affect each other and with an individual’s membership, his friends
may join that group as well. In publishing a piece of news, independent of its nature there are different ways to expand it. Since information isn’t always suitable and positive, this article is trying to introduce the immunization mechanism against this information. The meaning of immunization is a kind of Slow Publishing of such information in network. Therefor it has been tried in this article to slow down the
publishing of information or even stop them. With comparison of presented methods for immunization and also presenting rate delay parameter, the immunization of methods were evaluated and we identified the most effective immunization method. Among existing methods for immunization and recommended methods, recommended methods also have an effective role in preventing spread of malicious rumor.
ENHANCEMENT OF TRANSMISSION RANGE ASSIGNMENT FOR CLUSTERED WIRELESS SENSOR NE...IJCNCJournal
Transmitter range assignment in clustered wireless networks is the bottleneck of the balance between
energy conservation and the connectivity to deliver data to the sink or gateway node. The aim of this
research is to optimize the energy consumption through reducing the transmission ranges of the nodes,
while maintaining high probability to have end-to-end connectivity to the network’s data sink. We modified
the approach given in [1] to achieve more than 25% power saving through reducing cluster head (CH)
transmission range of the backbone nodes in a multihop wireless sensor network with ensuring at least
95% end-to-end connectivity probability.
ENERGY SAVINGS IN APPLICATIONS FOR WIRELESS SENSOR NETWORKS TIME CRITICAL REQ...IJCNCJournal
Along with handling and poor storage capacity, each sensor in wireless sensor network (WSN) is equipped
with a limited power source and very difficult to be replaced in most application environments. Improving
the energy savings in applications for wireless sensor networks is necessary. In this paper, we mainly focus
on energy consumption savings in applications for wireless sensor networks time critical requirements. Our
Paper accompanying analysis of advanced technologies for energy saving techniques for the optimization
of energy efficiency together with the data transmission is optimal. Moreover, we propose improvements to
increase energy savings in applications for wireless sensor networks require time critical (LEACH
improvements). Simulation results show that our proposed protocol significantly better than LEACH about
the formation of clusters in each round, the average power, the number of nodes alive and average total
received data in base stations.
PERFORMANCE ASSESSMENT OF CHAOTIC SEQUENCE DERIVED FROM BIFURCATION DEPENDENT...IJCNCJournal
In CDMA system, m-sequence and Gold codes are often utilized for spreading-despreading and
scrambling-descrambling operations. In a previous work, a design framework was created for generating
large family of codes from logistic map, which have comparable autocorrelation and cross correlation to
m-sequence and Gold codes. The purpose of this work is to evaluate the performance of these chaotic
codes in a CDMA environment. In the bit error rate (BER) simulation, matched filter, decorrelator and
MMSE receiver have been utilized. The received signal was modelled for synchronous CDMA uplink for
simulation simplicity purpose. Additive White Gaussian Noise channel model was assumed for the
simulation.
SDL BASED VALIDATION OF A NODE MONITORING PROTOCOLcscpconf
Mobile ad hoc network is a wireless, self-configured, infrastructure less network of mobile nodes. The nodes are highly mobile, which makes the application running on them face network related problems like node failure, link failure, network level disconnection, scarcity of resources, buffer degradation, and intermittent disconnection etc. Node failure and Network fault are need to be monitored continuously by supervising the network status. Node monitoring protocol is crucial, so it is required to test the protocol exhaustively to verify and validate the functionality and accuracy of the designed protocol. This paper presents a validation model for Node Monitoring Protocol using Specification and Description L language (SDL) using both Static Agent (SA) and Mobile Agent (MA). We have verified properties of the Node Monitoring Protocol (NMP) based on the global states with no exits, deadlock states or proper termination states using reach ability graph. Message Sequence Chart (MSC) gives an intuitive understanding of the described system behaviour with varying node density and complex behaviour etc.
Machine Learning Based Session Drop Prediction in LTE Networks and its SON As...Ericsson
Abnormal bearer session release (i.e. bearer session drop) in cellular telecommunication networks may seriously impact the quality of experience of mobile users. The latest mobile technologies enable high granularity real-time reporting of all conditions of individual sessions, which gives rise to use data analytics methods to process and monetize this data for network optimization. One such example for analytics is Machine Learning (ML) to predict session drops well before the end of session.
A SCALABLE MONITORING SYSTEM FOR SOFTWARE DEFINED NETWORKSijdpsjournal
Monitoring functionality is an essential element of any network system. Traditional monitoring solutions
are mostly used for manual and infrequent network management tasks. Software-defined networks (SDN)
have emerged with enabled automatic and frequent network reconfigurations. In this paper, a scalable
monitoring system for SDN is introduced. The proposed system monitors small, medium, and large-scale
SDN. Multiple instances of the proposed monitoring system can run in parallel for monitoring many SDN
slices. The introduced monitoring system receives requests from network management applications,
collects considerable amounts of measurement data, processes them, and returns the resulting knowledge
to the network management applications. The proposed monitoring system slices the network (switches and
links) into multiple slices. The introduced monitoring system concurrently monitors applications for
various tenants, with each tenant's application running on a dedicated network slice. Each slice is
monitored by a separate copy of the proposed monitoring system. These copies operate in parallel and are
synchronized. The scalability of the monitoring system is achieved by enhancing the performance of SDN.
In this context, scalability is addressed by increasing the number of tenant applications and expanding the
size of the physical network without compromising SDN performance.
Wireless Sensor Networks (WSNs) are distributed and independent sensors that are connected and worked together to measure quantities such as temperature, humidity, pressure, noise levels or vibrations. WSNs can measure vehicular movement (velocity, location, etc.) and monitor conditions such as lightning condition, soil makeup and motion. Nowadays, WSNs are utilized in many common applications such as vehicle applications. Some of vehicle applications are: vehicle tracking and detection, tire pressure monitoring, vehicle speed detection, vehicle direction indicator, traffic control, reversing aid sensors etc. Such applications can be divided in major categories such as safety, security, environment and logistics. To implement WSN in an application and have an efficient system, we need to consider about WSN technology, and its components. This paper is aimed at providing reliable software architecture of WSN that could be implemented for better performance and working.
Managing enterprise networks with cisco prime infrastructure_ 1 of 2Abdullaziz Tagawy
Network Management is define as monitoring, testing, configuring, and troubleshooting network components to meet a set of requirements defined by an organization.
The requirements include the smooth, efficient operation of the network that provides the predefined quality of service for users.
To accomplish this task, a network management system uses hardware, software, and humans.
Current issues - International Journal of Network Security & Its Applications...IJNSA Journal
nternational Journal of Network Security & Its Applications (IJNSA) is a bi monthly open access peer-reviewed journal that publishes articles which contribute new results in all areas of the computer Network Security & its applications. The journal focuses on all technical and practical aspects of security and its applications for wired and wireless networks. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on understanding Modern security threats and countermeasures, and establishing new collaborations in these areas.
A self-managing fault management mechanism for wireless sensor networks ijwmn
A sensor network can be described as a collection of sensor nodes which co-ordinate with each other to
perform some specific function. These sensor nodes are mainly in large numbers and are densely
deployed either inside the phenomenon or very close to it. They can be used for various application areas
(e.g. health, military, home). Failures are inevitable in wireless sensor networks due to inhospitable
environment and unattended deployment. Therefore, it is necessary that network failures are detected in
advance and appropriate measures are taken to sustain network operation. We previously proposed a
cellular approach for fault detection and recovery. In this paper we extend the cellular approach and
propose a new fault management mechanism to deal with fault detection and recovery. We propose a
hierarchical structure to properly distribute fault management tasks among sensor nodes by introducing
more ‘self-managing’ functions. The proposed failure detection and recovery algorithm has been
compared with some existing related work and proven to be more energy efficient.
Development of a Condition Monitoring Algorithm for Industrial Robots based o...IJECEIAES
Signal processing plays a significant role in building any condition monitoring system. Many types of signals can be used for condition monitoring of machines, such as vibration signals, as in this research; and processing these signals in an appropriate way is crucial in extracting the most salient features related to different fault types. A number of signal processing techniques can fulfil this purpose, and the nature of the captured signal is a significant factor in the selection of the appropriate technique. This chapter starts with a discussion of the proposed robot condition monitoring algorithm. Then, a consideration of the signal processing techniques which can be applied in condition monitoring is carried out to identify their advantages and disadvantages, from which the time-domain and discrete wavelet transform signal analysis are selected.
Marvell Network Telemetry Solutions for Data Center and Enterprise NetworksMarvell
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The Geoquorum approach for implementing atomic read/write shaved memory in mobile ad hoc networks. This
problem in distributed computing is revisited in the new setting provided by the emerging mobile computing technology. A
simple solution tailored for use in ad hoc networks is employed as a vehicle for demonstrating the applicability of formal
requirements and design strategies to the new field of mobile computing. The approach of this paper is based on well
understood techniques in specification refinement, but the methodology is tailored to mobile applications and help designers
address novel concerns such as logical mobility, the invocations, specific conditions constructs
Formal Specification for Implementing Atomic Read/Write Shared Memory in Mobi...ijcsit
The Geoquorum approach for implementing atomic read/write shaved memory in mobile ad hoc networks. This
problem in distributed computing is revisited in the new setting provided by the emerging mobile computing technology. A
simple solution tailored for use in ad hoc networks is employed as a vehicle for demonstrating the applicability of formal
requirements and design strategies to the new field of mobile computing. The approach of this paper is based on well
understood techniques in specification refinement, but the methodology is tailored to mobile applications and help designers
address novel concerns such as logical mobility, the invocations, specific conditions constructs. The proof logic and
programming notation of mobile UNITY provide the intellectual tools required to carryout this task. Also, the quorum
systems are investigated in highly mobile networks in order to reduce the communication cost associated with each distributed
operation.
FAULT DETECTION AND DIAGNOSIS OF INDUCTION MACHINE WITH ON-LINE PARAMETER PR...Sheikh R Manihar Ahmed
Today all instrumentation system pertaining to industrial process controls as well as domestic application involve automatic fault finding facility. This facility detects the faulty condition of the system and draws operator’s attention towards it enabling him to take suitable remedial action to ensure proper operation of the system. The main purpose of all FDI method is to monitor the system operations and in case of faults accommodate the source of faults so that timely corrective actions are taken. Fault detection simply involves a decision based on the monitored data as to whether there is a fault or the system is running normally. Fault isolation is then executed to identify the type and location of a fault after the fault detection has triggered an alarm so that corrective actions can be made. These two steps are known as Fault Detection and Isolation. Fault diagnosis is referred to as the combination of fault detection, identification and isolation. One such method of annunciation in which activation of visual or mechanical variable takes place when a removed switch or device has been activated as a result of fault in certain system, an audio alarm may also be associated with annunciations. This FDI system is defined and the existing technique to detect & isolate the fault with on-line parameter programming facility. The main advantage of the proposed approach of Control System based fault detection and isolation is its low cost. Low cost in terms of components used makes affordable in terms of easy handling and maintenance and various sensors can be used to give different types of input signals to circuit. An additional advantage is that the real time system still works when the host crashes, the matter that increases the reliability of the system & Data-logging facility can also be provided. A data-logger captures any measurement values which can be represented by a voltage. Nowadays, sensors and transducers are available for, practically, any physical quantity. The function of data-logger is to capture and store a specified number of specified number of sensor measurement values at predefined intervals and transfer the data including date and time to a PC in the form of file.
Remote Monitoring System for Communication Base Based on Short MessageNooria Sukmaningtyas
The automatic monitoring system of communication base which is an important means to realize
modernization of mobile communication base station management. In this paper, we implement a
monitoring system for communication base with three essential functions which are telemetry, remote
control and communication. In this system, data acquisition unit, data transmit unit and monitoring centre
unit are combined to form this monitoring system. The system can check the communication base status
anytime through GSM SMS (short message service), and can send predefined command to perform
remote data collection and monitoring in the special conditions. It is suitable especially for the alarm of
unusual situation, the monitoring of environmental information and entrance guard information. The paper,
firstly, proposes the architecture of the monitoring system; secondly, proposes the terminal of monitoring
system. The data collection terminal is studied and designed, including hardware design based on
embedded system and software design. Finally, presents implmentation and results. The monitoring
system can improve the integrity, reliability, flexibility and intellectuality of monitoring system. The system
with modular structure, which is low-cost, fitter and easier to move and operate, can be expanded
according to practical need and is reliable and effective through field test.
Vehicle Ad Hoc Networks (VANETs) have become a viable technology to improve traffic flow and safety on the roads. Due to its effectiveness and scalability, the Wingsuit Search-based Optimised Link State Routing Protocol (WS-OLSR) is frequently used for data distribution in VANETs. However, the selection of MultiPoint Relays (MPRs) plays a pivotal role in WS-OLSR's performance. This paper presents an improved MPR selection algorithm tailored to WS-OLSR, designed to enhance the overall routing efficiency and reduce overhead. The analysis found that the current OLSR protocol has problems such as redundancy of HELLO and TC message packets or failure to update routing information in time, so a WS-OLSR routing protocol based on improved-MPR selection algorithm was proposed. Firstly, factors such as node mobility and link changes are comprehensively considered to reflect network topology changes, and the broadcast cycle of node HELLO messages is controlled through topology changes. Secondly, a new MPR selection algorithm is proposed, considering link stability issues and nodes. Finally, evaluate its effectiveness in terms of packet delivery ratio, end-to-end delay, and control message overhead. Simulation results demonstrate the superior performance of our improved MR selection algorithm when compared to traditional approaches.
A Novel Medium Access Control Strategy for Heterogeneous Traffic in Wireless ...IJCNCJournal
So far, Wireless Body Area Networks (WBANs) have played a pivotal role in driving the development of intelligent healthcare systems with broad applicability across various domains. Each WBAN consists of one or more types of sensors that can be embedded in clothing, attached directly to the body, or even implanted beneath an individual's skin. These sensors typically serve asingle application. However, the traffic generated by each sensor may have distinct requirements. This diversity necessitates a dual approach: tailored treatment based on the specific needs of each traffic typeand the fulfillment of application requirements, such asreliability and timeliness. Never the less, the presence of energy constraints and the unreliable nature of wireless communications make QoS provisioning under such networks a non-trivial task. In this context, the current paper introduces a novel Medium AccessControl (MAC) strategy for the regular traffic applications of WBANs, designed to significantly enhance efficiency when compared to the established MAC protocols IEEE 802.15.4 and IEEE 802.15.6, with a particular focus on improving reliability, timeliness, and energy efficiency.
May_2024 Top 10 Read Articles in Computer Networks & Communications.pdfIJCNCJournal
The International Journal of Computer Networks & Communications (IJCNC) is a bi monthly open access peer-reviewed journal that publishes articles which contribute new results in all areas of Computer Networks & Communications. The journal focuses on all technical and practical aspects of Computer Networks & data Communications. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced networking concepts and establishing new collaborations in these areas.
A Topology Control Algorithm Taking into Account Energy and Quality of Transm...IJCNCJournal
The efficient use of energy in wireless sensor networks is critical for extending node lifetime. The network topology is one of the factors that have a significant impact on the energy usage at the nodes and the quality of transmission (QoT) in the network. We propose a topology control algorithm for software-defined wireless sensor networks (SDWSNs) in this paper. Our method is to formulate topology control algorithm as a nonlinear programming (NP) problem with the objective to optimizing two metrics, maximum communication range, and desired degree. This NP problem is solved at the SDWSN controller by employing the genetic algorithm (GA) to determine the best topology. The simulation results show that the proposed algorithm outperforms the MaxPower algorithm in terms of average node degree and energy expansion ratio.
Multi-Server user Authentication Scheme for Privacy Preservation with Fuzzy C...IJCNCJournal
The integration of artificial intelligence technology with a scalable Internet of Things (IoT) platform facilitates diverse smart communication services, allowing remote users to access services from anywhere at any time. The multi-server environment within IoT introduces a flexible security service model, enabling users to interact with any server through a single registration. To ensure secure and privacy preservation services for resources, an authentication scheme is essential. Zhao et al. recently introduced a user authentication scheme for the multi-server environment, utilizing passwords and smart cards, claiming resilience against well-known attacks. This paper conducts cryptanalysis on Zhao et al.'s scheme, focusing on denial of service and privacy attacks, revealing a lack of user-friendliness. Subsequently, we propose a new multi-server user authentication scheme for privacy preservation with fuzzy commitment over the IoT environment, addressing the shortcomings of Zhao et al.'s scheme. Formal security verification of the proposed scheme is conducted using the ProVerif simulation tool. Through both formal and informal security analyses, we demonstrate that the proposed scheme is resilient against various known attacks and those identified in Zhao et al.'s scheme.
Advanced Privacy Scheme to Improve Road Safety in Smart Transportation SystemsIJCNCJournal
In -Vehicle Ad-Hoc Network (VANET), vehicles continuously transmit and receive spatiotemporal data with neighboring vehicles, thereby establishing a comprehensive 360-degree traffic awareness system. Vehicular Network safety applications facilitate the transmission of messages between vehicles that are near each other, at regular intervals, enhancing drivers' contextual understanding of the driving environment and significantly improving traffic safety. Privacy schemes in VANETs are vital to safeguard vehicles’ identities and their associated owners or drivers. Privacy schemes prevent unauthorized parties from linking the vehicle's communications to a specific real-world identity by employing techniques such as pseudonyms, randomization, or cryptographic protocols. Nevertheless, these communications frequently contain important vehicle information that malevolent groups could use to Monitor the vehicle over a long period. The acquisition of this shared data has the potential to facilitate the reconstruction of vehicle trajectories, thereby posing a potential risk to the privacy of the driver. Addressing the critical challenge of developing effective and scalable privacy-preserving protocols for communication in vehicle networks is of the highest priority. These protocols aim to reduce the transmission of confidential data while ensuring the required level of communication. This paper aims to propose an Advanced Privacy Vehicle Scheme (APV) that periodically changes pseudonyms to protect vehicle identities and improve privacy. The APV scheme utilizes a concept called the silent period, which involves changing the pseudonym of a vehicle periodically based on the tracking of neighboring vehicles. The pseudonym is a temporary identifier that vehicles use to communicate with each other in a VANET. By changing the pseudonym regularly, the APV scheme makes it difficult for unauthorized entities to link a vehicle's communications to its real-world identity. The proposed APV is compared to the SLOW, RSP, CAPS, and CPN techniques. The data indicates that the efficiency of APV is a better improvement in privacy metrics. It is evident that the AVP offers enhanced safety for vehicles during transportation in the smart city.
April 2024 - Top 10 Read Articles in Computer Networks & CommunicationsIJCNCJournal
The International Journal of Computer Networks & Communications (IJCNC) is a bi monthly open access peer-reviewed journal that publishes articles which contribute new results in all areas of Computer Networks & Communications. The journal focuses on all technical and practical aspects of Computer Networks & data Communications. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced networking concepts and establishing new collaborations in these areas.
DEF: Deep Ensemble Neural Network Classifier for Android Malware DetectionIJCNCJournal
Malware is one of the threats to security of computer networks and information systems. Since malware instances are available sufficiently, there is increased interest among researchers on usage of Artificial Intelligence (AI). Of late AI-enabled methods such as machine learning (ML) and deep learning paved way for solving many real-world problems. As it is a learning-based approach, accumulated training samples help in improving thequality of training and thus leveraging malware detection accuracy. Existing deep learning methods are focusing on learning-based malware detection systems. However, there is need for improving the state of the art through ensemble approach. Towards this end, in this paper we proposed a framework known as Deep Ensemble Framework (DEF) for automatic malware detection. The framework obtains features from training samples. From given malware instance a grayscale image is generated. There is another process to extract the opcode sequences. Convolutional Neural Network (CNN) and Long Short Term Memory (LSTM) techniques are used to obtain grayscale image and opcode sequence respectively. Afterwards, a stacking ensemble is employed in order to achieve efficient malware detection and classification. Malware samples collected fromthe Internet sources and Microsoft are used for theempirical study. An algorithm known as Ensemble Learning for Automatic Malware Detection (EL-AML) is proposed to realize our framework. Another algorithm named Pre-Process is proposed to assist the EL-AML algorithm for obtaining intermediate features required by CNN and LSTM.Empirical study reveals that our framework outperforms many existing methods in terms of speed-up and accuracy.
High Performance NMF Based Intrusion Detection System for Big Data IOT TrafficIJCNCJournal
With the emergence of smart devices and the Internet of Things (IoT), millions of users connected to the network produce massive network traffic datasets. These vast datasets of network traffic, Big Data are challenging to store, deal with and analyse using a single computer. In this paper we developed parallel implementation using a High Performance Computer (HPC) for the Non-Negative Matrix Factorization technique as an engine for an Intrusion Detection System (HPC-NMF-IDS). The large IoT traffic datasets of order of millions samples are distributed evenly on all the computing cores for both storage and speedup purpose. The distribution of computing tasks involved in the Matrix Factorization takes into account the reduction of the communication cost between the computing cores. The experiments we conducted on the proposed HPC-IDS-NMF give better results than the traditional ML-based intrusion detection systems. We could train the HPC model with datasets of one million samples in only 31 seconds instead of the 40 minutes using one processor), that is a speed up of 87 times. Moreover, we have got an excellent detection accuracy rate of 98% for KDD dataset.
A Novel Medium Access Control Strategy for Heterogeneous Traffic in Wireless ...IJCNCJournal
So far, Wireless Body Area Networks (WBANs) have played a pivotal role in driving the development of intelligent healthcare systems with broad applicability across various domains. Each WBAN consists of one or more types of sensors that can be embedded in clothing, attached directly to the body, or even implanted beneath an individual's skin. These sensors typically serve asingle application. However, the traffic generated by each sensor may have distinct requirements. This diversity necessitates a dual approach: tailored treatment based on the specific needs of each traffic typeand the fulfillment of application requirements, such asreliability and timeliness. Never the less, the presence of energy constraints and the unreliable nature of wireless communications make QoS provisioning under such networks a non-trivial task. In this context, the current paper introduces a novel Medium AccessControl (MAC) strategy for the regular traffic applications of WBANs, designed to significantly enhance efficiency when compared to the established MAC protocols IEEE 802.15.4 and IEEE 802.15.6, with a particular focus on improving reliability, timeliness, and energy efficiency.
A Topology Control Algorithm Taking into Account Energy and Quality of Transm...IJCNCJournal
The efficient use of energy in wireless sensor networks is critical for extending node lifetime. The network topology is one of the factors that have a significant impact on the energy usage at the nodes and the quality of transmission (QoT) in the network. We propose a topology control algorithm for software-defined wireless sensor networks (SDWSNs) in this paper. Our method is to formulate topology control algorithm as a nonlinear programming (NP) problem with the objective to optimizing two metrics, maximum communication range, and desired degree. This NP problem is solved at the SDWSN controller by employing the genetic algorithm (GA) to determine the best topology. The simulation results show that the proposed algorithm outperforms the MaxPower algorithm in terms of average node degree and energy expansion ratio.
Multi-Server user Authentication Scheme for Privacy Preservation with Fuzzy C...IJCNCJournal
The integration of artificial intelligence technology with a scalable Internet of Things (IoT) platform facilitates diverse smart communication services, allowing remote users to access services from anywhere at any time. The multi-server environment within IoT introduces a flexible security service model, enabling users to interact with any server through a single registration. To ensure secure and privacy preservation services for resources, an authentication scheme is essential. Zhao et al. recently introduced a user authentication scheme for the multi-server environment, utilizing passwords and smart cards, claiming resilience against well-known attacks. This paper conducts cryptanalysis on Zhao et al.'s scheme, focusing on denial of service and privacy attacks, revealing a lack of user-friendliness. Subsequently, we propose a new multi-server user authentication scheme for privacy preservation with fuzzy commitment over the IoT environment, addressing the shortcomings of Zhao et al.'s scheme. Formal security verification of the proposed scheme is conducted using the ProVerif simulation tool. Through both formal and informal security analyses, we demonstrate that the proposed scheme is resilient against various known attacks and those identified in Zhao et al.'s scheme.
Advanced Privacy Scheme to Improve Road Safety in Smart Transportation SystemsIJCNCJournal
In -Vehicle Ad-Hoc Network (VANET), vehicles continuously transmit and receive spatiotemporal data with neighboring vehicles, thereby establishing a comprehensive 360-degree traffic awareness system. Vehicular Network safety applications facilitate the transmission of messages between vehicles that are near each other, at regular intervals, enhancing drivers' contextual understanding of the driving environment and significantly improving traffic safety. Privacy schemes in VANETs are vital to safeguard vehicles’ identities and their associated owners or drivers. Privacy schemes prevent unauthorized parties from linking the vehicle's communications to a specific real-world identity by employing techniques such as pseudonyms, randomization, or cryptographic protocols. Nevertheless, these communications frequently contain important vehicle information that malevolent groups could use to Monitor the vehicle over a long period. The acquisition of this shared data has the potential to facilitate the reconstruction of vehicle trajectories, thereby posing a potential risk to the privacy of the driver. Addressing the critical challenge of developing effective and scalable privacy-preserving protocols for communication in vehicle networks is of the highest priority. These protocols aim to reduce the transmission of confidential data while ensuring the required level of communication. This paper aims to propose an Advanced Privacy Vehicle Scheme (APV) that periodically changes pseudonyms to protect vehicle identities and improve privacy. The APV scheme utilizes a concept called the silent period, which involves changing the pseudonym of a vehicle periodically based on the tracking of neighboring vehicles. The pseudonym is a temporary identifier that vehicles use to communicate with each other in a VANET. By changing the pseudonym regularly, the APV scheme makes it difficult for unauthorized entities to link a vehicle's communications to its real-world identity. The proposed APV is compared to the SLOW, RSP, CAPS, and CPN techniques. The data indicates that the efficiency of APV is a better improvement in privacy metrics. It is evident that the AVP offers enhanced safety for vehicles during transportation in the smart city.
DEF: Deep Ensemble Neural Network Classifier for Android Malware DetectionIJCNCJournal
Malware is one of the threats to security of computer networks and information systems. Since malware instances are available sufficiently, there is increased interest among researchers on usage of Artificial Intelligence (AI). Of late AI-enabled methods such as machine learning (ML) and deep learning paved way for solving many real-world problems. As it is a learning-based approach, accumulated training samples help in improving thequality of training and thus leveraging malware detection accuracy. Existing deep learning methods are focusing on learning-based malware detection systems. However, there is need for improving the state of the art through ensemble approach. Towards this end, in this paper we proposed a framework known as Deep Ensemble Framework (DEF) for automatic malware detection. The framework obtains features from training samples. From given malware instance a grayscale image is generated. There is another process to extract the opcode sequences. Convolutional Neural Network (CNN) and Long Short Term Memory (LSTM) techniques are used to obtain grayscale image and opcode sequence respectively. Afterwards, a stacking ensemble is employed in order to achieve efficient malware detection and classification. Malware samples collected fromthe Internet sources and Microsoft are used for theempirical study. An algorithm known as Ensemble Learning for Automatic Malware Detection (EL-AML) is proposed to realize our framework. Another algorithm named Pre-Process is proposed to assist the EL-AML algorithm for obtaining intermediate features required by CNN and LSTM.Empirical study reveals that our framework outperforms many existing methods in terms of speed-up and accuracy.
High Performance NMF based Intrusion Detection System for Big Data IoT TrafficIJCNCJournal
With the emergence of smart devices and the Internet of Things (IoT), millions of users connected to the network produce massive network traffic datasets. These vast datasets of network traffic, Big Data are challenging to store, deal with and analyse using a single computer. In this paper we developed parallel implementation using a High Performance Computer (HPC) for the Non-Negative Matrix Factorization technique as an engine for an Intrusion Detection System (HPC-NMF-IDS). The large IoT traffic datasets of order of millions samples are distributed evenly on all the computing cores for both storage and speedup purpose. The distribution of computing tasks involved in the Matrix Factorization takes into account the reduction of the communication cost between the computing cores. The experiments we conducted on the proposed HPC-IDS-NMF give better results than the traditional ML-based intrusion detection systems. We could train the HPC model with datasets of one million samples in only 31 seconds instead of the 40 minutes using one processor), that is a speed up of 87 times. Moreover, we have got an excellent detection accuracy rate of 98% for KDD dataset.
IoT Guardian: A Novel Feature Discovery and Cooperative Game Theory Empowered...IJCNCJournal
Cyber intrusion attacks increasingly target the Internet of Things (IoT) ecosystem, exploiting vulnerable devices and networks. Malicious activities must be identified early to minimize damage and mitigate threats. Using actual benign and attack traffic from the CICIoT2023 dataset, this WORK aims to evaluate and benchmark machine-learning techniques for IoT intrusion detection. There are four main phases to the system. First, the CICIoT2023 dataset is refined to remove irrelevant features and clean up missing and duplicate data. The second phase employs statistical models and artificial intelligence to discover novel features. The most significant features are then selected in the third phase based on cooperative game theory. Using the original CICIoT2023 dataset and a dataset containing only novel features, we train and evaluate a variety of machine learning classifiers. On the original dataset, Random Forest achieved the highest accuracy of 99%. Still, with novel features, Random Forest's performance dropped only slightly (96%) while other models achieved significantly lower accuracy. As a whole, the work contributes substantial contributions to tailored feature engineering, feature selection, and rigorous benchmarking of IoT intrusion detection techniques. IoT networks and devices face continuously evolving threats, making it necessary to develop robust intrusion detection systems.
Enhancing Traffic Routing Inside a Network through IoT Technology & Network C...IJCNCJournal
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Assessment of health monitoring
1. International Journal of Computer Networks & Communications (IJCNC) Vol.7, No.5, September 2015
DOI : 10.5121/ijcnc.2015.7501 1
ASSESSMENT OF HEALTH MONITORING
SYSTEM USING SDL FORMAL METHOD
Anandi Giridharan and Pallapa Venkataram
Indian Institute of Science, Department of ECE, INDIA
ABSTRACT
Sensor nodes are highly mobile, which makes the application running on them face network related
problems like node failure, link failure, network level disconnection, scarcity of resources etc. Node failure
and Network fault are need to be monitored continuously by supervising the network status especially for
critical applications like Health Monitoring System. We propose Node Monitoring protocol (NMP) to
monitor the node good conditions using agents and ensure that node gets promised quality of service.
These Nodes senses environment and communicates important data to the sink or base station. To
establish the correct event time, these nodes need to be synchronized with global clock. Therefore, time
synchronization is very important parameter. We have built a simulating environment for Validating Node
Monitoring Protocol (NMP) to assess the reliability of Health Monitoring systems. Formal Specification
and Description Language tool (SDL) has been used to validate the NMP at design time in order to
increase the confidence and efficiency of the system.
KEYWORDS
SDL (Specification and Description Language), validation, Node Monitoring Protocol(NMP), safety and
liveness property.
1. INTRODUCTION
Potential of Sensor Networks in healthcare requires addressing a multitude of technical
challenges. Healthcare applications impose stringent requirements on system reliability,
efficiency and quality of service. In this paper, these challenges have been expanded and
specification and validation using SDL tools attempts to confront them. The usage of Mobile
Agents gives the solution to the scalable problem in centralized network management[1].
Mobile Agents plays a vital role in node monitoring process[2]. Agents carry out management
function in an autonomous and efficient way[3]. This paper presents a formal model of the Node
Monitoring Protocol based on SDL using the Finite State Model. Formal description using SDL
specifies the functional operation of the protocol and also helps in detecting design errors like
deadlock, livelock, unspecified reception, non-executable interactions, etc. The rest of the paper
is organized as follows. Section 2. details Health Monitoring system; Section 3. discusses on
Significance of Node Monitoring Protocol (NMP) in Ubiquitous environment. Section 4 presents
Formal SDL specification of NMP. Section 5. illustrates verification of NMP. Section 6. Shows
various design errors like deadlock, unspecified reception, livelocks, etc. Section 6 draws the
conclusion.
2. International Journal of Computer Networks & Communications (IJCNC) Vol.7, No.5, September 2015
2
2. HEALTH MONITORING SYSTEM
Health monitoring systems is been very helpful to manage chronic disease, post-operation care,
and monitoring the safety of the patient. Wireless technologies integrated with mobile devices
form patient-friendly health monitoring systems. An health monitoring system is based on
Wireless Body Sensor Networks. A set of physiological sensors can be integrated into a wearable
wireless body area computer assisted network that can be used for monitoring and restoring good
health. Sensor nodes that can be vulnerable to failures due to packet loss, Node failure etc. Thus
it is appropriate to provide sensor network of an system that gives alert messages to Health care
givers. It is needed to validate the performance and robustness of the NMP at design time to
check the fault tolerance and also detect occurrence of failures and appropriately rectify them. In
our work we have simulated NMP using formal Specification and Description Language tool to
observe the behavior of protocol . So that this could be more useful since verification at design
time could be extended to real time situations.
3.SIGNIFICANCE OF NODE MONITORING PROTOCOL IN
UBIQUITOUS ENVIRONMENT
In a Health Monitoring System, accurate and efficient monitoring of dynamically changing
environment is very important in order to obtain the seamless transparency within mobile
devices[4]. Monitoring resource allocation scheme for the Unodes is very important to check
their Quality of Service. Static and Mobile Agent, based technology can provide a good
framework to develop Health Monitoring Systems for ubiquitous network environment, since it
can do complicated works on behalf of a node independently and transparently[5]. Static Agent
sends a request to Mobile Agent to collect raw resource information from the nodes like some of
the health conditions like node failure, link failure, misbehaviour of the nodes in the network and
to report the monitored results to them. Solution for entering the recovery upon validation is
worked out that maintains the health of Node Monitoring Protocol[6].
3.1.FINITE STATE MACHINE FORMALISM OF NODE MONITORING
PROTOCOL
An Finite State Machine M, is a 5-tuple A=(I, O, S, T, F) I is the Input, O is the output and S is
the states and F is the finite sets. The main system which runs at the central node, where Static
Agent is deployed for collection of network status information. The Mobile monitoring system is
status monitoring segment, which runs in the migrated Mobile Agents. Figure 1. shows the State
transition sequence that illustrates that NMP is capable of delivering data without duplication and
in right order. Initially Static Agent which resides in the main segment in idle state then if
requests arise, creates Mobile Agent and dispatches sending request M req to monitor the status
of the node, initiating the timer. Even if channel loses Mreq, time out occurs triggering
retransmission. and time channel correctly delivers the message. Now Mobile agent sends
Request to Node 1 and in case channel loses the Request, Time out occurs and retransmission of
the data takes place. Request goes to Node 1 and Mobile Agent monitors the node collects the
status of the Node like node failure, link failure, energy level, throughput etc, and delivers to the
Static Agent and goes into idle state again. Many important properties of requirement
specifications can be checked during requirements capture. First of all, requirements
characterizing the total behavior of a system may be expressed in terms of temporal modalities
(dynamic requirements) including safety and liveness conditions.
3. International Journal of Computer Networks & Communications (IJCNC) Vol.7, No.5, September 2015
3
Figure 1: Formal FSM specification of NMP
4.FORMAL SPECIFICATION OF NODE MONITORING
PROTOCOL USING SDL
Figure 2: System of Node Monitoring protocol using SDL
We choose SDL (Specification and Description Language) as the target language because it
supports more highly-detailed design, so that code automatically generated from the specification
can be a much more complete implementation of the system compared to the code generated by
UML. The syntax and semantics of SDL are formally defined, standardized, and maintained by
the International Telecommunication Union. Its goal is to specify the behaviour of a system from
the representation of its functional aspects. The top level of an SDL specification is a system
agent consisting of two sub-agents, Static agent and Mobile agent. Blocks of the node monitoring
protocol are used to define a system structure as shown in figure 2. We have considered 4 blocks,
Static Agent, Mobile Agent, Node 1 and Node 2 as shown in figure 3. Process specifies the
behaviour of a system from the representation of its functional aspects. We have shown the
behaviour of the processes of Mobile Agent process, Static Agent process, Node1 process and
4. International Journal of Computer Networks & Communications (IJCNC) Vol.7, No.5, September 2015
4
Node2 process as shown in figures 4, 5, 6 and 7 respectively. Signal routes transfer signal
immediately while channels may be delaying. The signal specification identifies the name of the
signal type and the sorts of the parameters to be carried by the signal such as Mreq, resp, req,
inforequest1, inforesponse1, inforequest2, inforesponse2. As seen in the SDL model, Static Agent
(SA) behaviour is expressed as a process which exists in a state, waiting for an input (event)
triggered from environment. When Mreq signal is sent from environment, SA locates Mobile
Agent(MA) and sends a request to collect health of the nodes. We have considered two Nodes N1
and N2 in our case. MA interacts with the nodes and gets node information back to SA. We have
to note that such a specification may contain few errors during its design even from the
requirements. For this reason, we have used model checking technique like generating Message
sequence chart in order to verify our specification. Indeed, before validating an implementation
we need to make sure that the used specification corresponds to the requirements. Simulation was
done to verify that specification is free from deadlocks and live-locks within simulated space.
Presence of such dead-locks or live-locks reveals that Node Monitoring Protocol system does not
behave as expected that can be monitored using Message sequence chart that is generated after
simulation. MSCs are another valuable description technique for visualizing and specifying inter-
system, asynchronous component interaction[7]. MSC strength lies in their ability to describe
communication between cooperating processes. There are arrows representing messages passed
from a sending to a receiving process.
Figure 3: Blocks of Node Monitoring protocol using SDL
Figure 4: Process Static Agent Of Node Monitoring Protocol Using SDL
5. International Journal of Computer Networks & Communications (IJCNC) Vol.7, No.5, September 2015
5
Figure 5: Process of Node 1 of Node Monitoring protocol using SDL
Figure 6: Process Mobile Agent of Node Monitoring protocol using SDL
Figure 7: Process of Node 2 of Node Monitoring protocol using SDL
6. International Journal of Computer Networks & Communications (IJCNC) Vol.7, No.5, September 2015
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4.2. VERIFICATION OF NMP
We manually derived the EFSM directly from the IETF specification . The verification process
consists to map the traces of I/O events (messages received and sent) recorded on each node, with
the specification. As seen in Figure 8. C1 is the outgoing channel of the Static Agent and C2 is the
outgoing channel of the Mobile Agent.
Undesired events, such as node crash, packet loss may undermine effect of sensor network. Their
influence need to be properly assessed/ from early stages of development process to minimize the
probability of unexpected errors during use. System verification and model checking was
conducted to check liveness and safety property and also static verification was done by
generating sequence of events and resulting actions were analysed. Sequence of random
undesirable events were generated and action based on bottleneck were also analysed.
Figure 8: Verification of NMP
Liveness property: In system verification and model checking, liveness properties are
requirements that something good must eventually happen For example, with every request from
Static Agent, Node status should be collected by Mobile Agent and protocol should terminate
successfully.
Proof of Liveness Property
Liveness property is taken care in design process, they include termination of the protocol. From
above transition state, we observe that message M req and Response are transmitted from and to
Static Agent respectively even under the conditions of frame and acknowledgement loss and
NMP returns to its terminator state. Hence Specified messages have been transmitted and
received correctly.
Safety property: Bad things will not happen. For example. Node Monitoring Protocol should
operate properly. Message Sequence Chart shows the behaviour of the normal NMP as shown in
the figure 9. We chose to rely on the FSM formalism because it suits very well to the analysis of
data flows and allows to put constraints on the variables of the transitions.
7. International Journal of Computer Networks & Communications (IJCNC) Vol.7, No.5, September 2015
7
Proof of Safely properties
From transitions, we can see handling of lost frames and Acknowledgement are done by
retransmission and no redundancy has occurred by sending two duplicates of the same message.
Hence safety property.
Figure 9: Message Sequence chart showing expected communication between various entities
5.VALIDATION OF NODE MONITORING PROTOCOL
Failures may also arise at run-time, for example, because of the loss of network connectivity.
node failure, link failure etc. The design of the framework must ensure its ability to hold good
under increasing load, increasing complexity of requests and increasing size of resulting
composite services[8]. Validation ensures that the protocol specifications will not get into
protocol design errors. (Deadlock, unspecified reception, livelock etc). We have used Message
sequence charts for validation of Node Monitoring Protocol. MSCs were used to identify different
kinds of errors like Deadlock, unreachable states, livelocks etc.
5.1. DEADLOCK
Figure 10: Deadlock error in Node Monitoring protocol
8. International Journal of Computer Networks & Communications (IJCNC) Vol.7, No.5, September 2015
8
Deadlock is a scenario, whereby state machines cannot progress to another state because they are
waiting for an event that will never occur. Static Agent sends creates Mobile Agent and
dispatches, due to the failure of the node, Mobile Agent does not respond to the request of Static
Agent. Static Agent waits for random time and time out occurs and again sends request to Static
Agent and again goes to wait state. So both the state machines cannot progress further waiting for
event to occur that never happens. Hence Deadlock occurs as seen in figure 10. Referring to the
Message sequence chart, we can see that Static agent send the request to Mobile Agent. Due to
failure of Mobile Agent node, it does not respond. Static agent waits for certain time. Time out
occurs and again new request is sent from Static Agent and again goes to wait process expecting
Mobile agent to respond, which does not happen. So state machines cannot progress further
waiting for event to occur, that never happens. Hence Dead lock occurs. Figure 11 shows the
MSC of NMP that indicates Deadlock, where 2 process cannot progress further waiting event to
occur.
In simulation, we have considered the timing requirement of packet exchange and time out etc.
Violation of timing behaviour of the protocol like repetitive retransmission attempts and dispute
giving up data transfer were studied for various events. After transmission of data , timer was
started and in case no acknowledgements were received within stipulated time timer will expire
and again retransmission of the data frame is done.
Figure 11: Message Sequence chart showing Dead Lock error in NMP
5.2 UNSPECIFIED RECEPTION:
Figure 12: Unexpected State error in NMP
9. International Journal of Computer Networks & Communications (IJCNC) Vol.7, No.5, September 2015
9
Use of timers may prevent deadlocks, but their use may result in states that are never reached if
the specification is faulty[9]. In our simulation, When there was no request from environment,
Static Agent is in idle state. Once the request comes from environment , Static Agent sends
request to Mobile Agent. Mobile agent goes to Nodes and collects their status. In this case error
will propagate because a generic deadlock timer expired that was unaware of the state specific
actions to take at this point. So due to ambiguity, Static Agent is not in position to decide what
state it should be, hence goes idle. Even through Mobile Agent is ready with node status, Static
Agent is not a possible to accept the information as shown in figure 12. Figure 13. shows the
MSC indicating the unexpected state error due to ambiguity.
Figure 13: Message Sequence chart showing Unexpected State error in NMP
5.3. DATA LOSS:
As indicated in figure 14, request from Node1 gets lost in channel and no response from Mobile
Agent regarding status of the Node. Figure 15. shows that Request sent by Static Agent to Mobile
Agent and request gets lost in the channel, Response comes from only from Node2 to Mobile
Agent. Data loss occurs, when one or more packets of data travelling across a network fail to
reach their destination. Data loss can be caused by a number of factors, including packet drop
because of channel congestion, rejected corrupted packets, faulty networking hardware. As seen
in the figure 16, it shows that the data loss increases if more number of packets are sent. Hence
throughput will be less due to the number of retransmission.
Figure 14: Data Loss occurring in channel
10. International Journal of Computer Networks & Communications (IJCNC) Vol.7, No.5, September 2015
10
Figure 15: Message Sequence chart showing Data Loss occurring in channel
Figure 16: Data loss verses number of packets sent
5.4. LIVELOCKS:
Figure 17: Message Sequence chart shows infinite loop livelock error
11. International Journal of Computer Networks & Communications (IJCNC) Vol.7, No.5, September 2015
11
Livelock is a scenario whereby sequences of messages is repeated in an endless loop as shown in
figure 17. Without appropriate safety mechanisms livelock can consume all of the resources in a
network. Livelocks can occur depending on the value of data, such as an entity forwarding a
message to itself . MSC indicates, how sequence of messages are repeated in an endless manner
as shown in figure 18.
Figure 18: Message Sequence chart shows infinite loop livelock error
6. SIMULATION AND RESULTS
We simulated on five to fifteen nodes creating basic events like : Disconnect (node i) at certain
time Ti , Stopping (node j) at certain Time Tj , Sending event at time Tk and observing the
output actions. Checking for nodes that were not reachable. Simulation was conducted by
randomly selecting the events and time-points. We Observed, It was found that various errors
increases as the traffic on the network increased.
7. CONCLUSION
This paper has presented verification and validation model for the Node Monitoring protocol in
assessment of Health Monitoring System. It includes a formal specification of the protocol using
Specification and Description Language and Message sequence charts a method and a tool for the
automated test generation of scenarios. Validation checks for safety and liveness property of the
protocol to check proper functioning and termination of protocol and validation model presents
several advantages[10][11]. First, the design of a formal specification from which tests are
generated contributes to eliminate design errors like Deadlock, unspecified receptions and
livelocks and using SDL, it is shown that design flaws and ambiguity introduced in informally
specified, textual protocols can be avoided if protocol is formally modelled.
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Authors
Anandi Giridharan, received MSc(Engg) from Indian Institute of Science. She
currently working as Senior Scientific Officer in ECE Department, Indian Institute
Science, Bangalore. Her Research Interest are in area of Ubiquitous Learning,
Communication Protocols and Multimedia systems.
Prof. Venkataram Pallapa received his Ph.D. Degree in Information Sciences from
the University of Sheffield, England, in 1986. He is currently the chairman for centre
for continuing education, and also a Professor in the Department of Electrical
Communication Engineering, Indian Institute of Science, Bangalore, India.
Dr. Pallapa's research interests are in the areas of Wireless Ubiquitous Networks,
Communication Protocols, Computation Intelligence applications in Communication Networks and
Multimedia Systems.
Dr. Pallapa is the holder of a Distinguished Visitor Diploma from the Orrego University, Trujillo, PERU.
He has published over 150 papers in International/national Journals/conferences. Written three books:
Mobile and wireless application security, Tata McGraw-Hill, Communication Protocol Engineering,
publications Prentice-Hall of India (PHI), New Delhi, 2014 (Co-author: Sunil Manvi, B Satish Babu) and
Multimedia: Concepts & Communication, Darling Kinderley(India) Pvt. Ltd., licensees of Pearson
Education in South Asia, 2006. Written chapters for two different books, and a guest editor to the IISc
Journal for a special issue on Multimedia Wireless Networks. He has received best paper awards at
GLOBECOM'93 and INM'95 and also CDIL (Commu nication Devices India Ltd) for a paper published in
IETE Journal. He is a Fellow of IEE (England), Fellow of IETE(India) and a Senior member of IEEE
Computer Society.