The document summarizes an Efficient Position-Based Opportunistic Routing (EPOR) protocol proposed for mobile ad hoc networks. EPOR takes advantage of geographic routing and the broadcast nature of wireless transmissions. When a packet is transmitted, overhearing nodes can act as forwarding candidates. The best forwarder is chosen, but if it fails to forward in time, a suboptimal candidate will forward instead to avoid transmission interruptions. Simulation results show EPOR achieves higher packet delivery ratios and lower end-to-end delays than GPSR and AOMDV routing protocols, even under high node mobility.
A comparative study in wireless sensor networksijwmn
Sensor networks consist of a large number of small, low-powered wireless nodes with limited computation,
communication, and sensing abilities, in a battery-powered sensor network, energy and communication
bandwidth are a precious resources. Thus, there is a need to adapt the networking process to match the
application in order to minimize the resources consumed and extend the life of the network. In this paper,
we introduce a comparative study in different routing algorithms that propose vital solutions to the most
important issues that should be taken into account when designing wireless network which are reliability,
lifetime, communication bandwidth, transmission rand, and finally the limited energy issue, so we will
introduce their algorithms and discuss how did they propose to solve such of these challenges and finally
we will do some evaluation to each approach.
GRAPH THEORETIC ROUTING ALGORITHM (GTRA) FOR MOBILE AD-HOC NETWORKS (MANET)graphhoc
Battlefield theater applications require supporting large number of nodes. It can facilitate many multi-hop
paths between each source and destination pairs. For scalability, it is critical that for supporting network
centric applications with large set of nodes require hierarchical approach to designing networks. In this
research we consider using Mobile Ad Hoc Network (MANET) with multiple clusters. Each cluster
supports a few nodes with a cluster head. The intra-cluster connectivity amongst the nodes within the
cluster is supported by multi-hop connectivity to ensure handling mobility in such a way that no service
disruption can occur. The inter-cluster connectivity is also achieved by multi-hop connectivity. However,
for inter-cluster communications, only cluster heads are connected. The selection of intra-cluster
communications and inter-cluster communications allow scalability of the network to support multiservices
applications end-to-end with a desired Quality of Service (QoS). This paper proposes graph
theoretic approach to establish efficient connection between a source and a destination within each cluster
in intra-cluster network and between clusters in inter-cluster network. Graph theoretic approach
traditionally was applied networks where nodes are static or fixed. In this paper, we have applied the
graph theoretic routing to MANET where nodes are mobile. One of the important challenges in MANET is
to support an efficient routing algorithm for multi-hop communications across many nodes which are
dynamic in nature. However, dynamic behavior of the nodes requires greater understanding of the node
degree and mobility at each instance of time in order to maintain end-to-end QoS for multi-service
provisioning. This paper demonstrates graph theoretic approach produces an optimum multi-hop
connectivity path based on cumulative minimum degree that minimizes the contention and scheduling
delay end-to-end. It is applied to both intra-cluster communications as well as inter-cluster
communications. The performance shows that having a multi-hop connectivity for intra-cluster
communications is more power efficient compared to broadcast of information with maximum power
coverage. Each cluster performs similarly and the algorithm is also used for inter-cluster communications.
Our simulation results show that the proposed graph theoretic routing approach will reduce the overall
delay and improves the physical layer data frame transmission.
Quality of Service Routing in Mobile Ad hoc Networks Using Node Mobility and ...IJNSA Journal
Exceptionally dynamic networks are Mobile Ad hoc Networks. Quality of Service (QoS) routing in such
Networks are frequently limited by the network split due to either energy depletion or node mobility of the
mobile nodes. In addition, to fulfill specific quality parameters, existence of multiple node-disjoint paths
becomes essential. Such paths assist in the optimal traffic distribution and consistency in case of path
breakages. Thus, to accommodate such problem, we present a node-disjoint multipath protocol. The metric
system of measurement used to select the paths takes into account the stability of the nodes and the
equivalent links.
Mobile ad hoc network is a reconfigurable network of mobile nodes connected by multi-hop wireless links and capable of operating without any fixed infrastructure support. In order to facilitate communication within such self-creating, self-organizing and self administrating network, a dynamic routing protocol is needed. The primary goal of such an ad hoc network routing protocol is to discover and establish a correct and efficient route between a pair of nodes so that messages may be delivered in a timely manner. Route construction should be done with a minimum of overhead and bandwidth consumption. This paper examines two routing protocols, both on-demand source routing, for mobile ad hoc networks– the Dynamic Source Routing (DSR), an flat architecture based and the Cluster Based Routing Protocol (CBRP), a cluster architecture based and evaluates both routing protocols in terms of packet delivery fraction, normalized routing load, average end to end delay, throughput by varying number of nodes per sq. km, traffic sources and mobility. Simulation results show that in high
mobility (pause time 0s) scenarios, CBRP outperforms DSR. CBRP scales well with increasing number of nodes.
Tree Based Proactive Source Routing Protocol for MANETspaperpublications3
bstract: A mobile adhoc network (MANET) is a wireless communication network and the node that does not lie within the direct transmission range of each other depends on the intermediate nodes to forward data. Opportunistic data forwarding has not been widely utilized in mobile adhoc networks (MANETs) and the main reason is the lack of an efficient lightweight proactive routing scheme with strong source routing capability. PSR protocol facilitates opportunistic data forwarding in MANETs. In PSR, each node maintains a breadth-first search spanning tree of the network rooted at it-self. This information is periodically exchanged among neighboring nodes for updated network topology information. Here added a Mobile sink to reduce the overhead in case of number of child node increases and also to reduce the delay.
Influence of Clustering on the Performance of MobileAd Hoc Networks (MANETs)Narendra Singh Yadav
Clustering is an important research area for mobile ad hoc networks (MANETs) as it increases the capacity of network, reduces the routing overhead and makes the network more scalable in the presence of both high mobility and a large number of mobile nodes. Routing protocols based on flat topology are not scalable because of their built-in characteristics. However, clustering cause overhead which consumes considerable bandwidth, drain mobile nodes energy quickly, likely cause congestion, collision and data delay in larger networks. This paper uses an implementation of the Dynamic Source Routing (DSR), an flat architecture based and the Cluster Based Routing Protocol (CBRP), a cluster architecture based routing protocol to examine the influence of clustering on the performance of mobile ad hoc networks. This paper evaluates channel utilization and control overhead as a function of number of nodes per sq. km to show the effect of clustering. Simulation results show that in high mobility scenarios, CBRP outperforms DSR. CBRP scales well with increasing number of nodes.
A comparative study in wireless sensor networksijwmn
Sensor networks consist of a large number of small, low-powered wireless nodes with limited computation,
communication, and sensing abilities, in a battery-powered sensor network, energy and communication
bandwidth are a precious resources. Thus, there is a need to adapt the networking process to match the
application in order to minimize the resources consumed and extend the life of the network. In this paper,
we introduce a comparative study in different routing algorithms that propose vital solutions to the most
important issues that should be taken into account when designing wireless network which are reliability,
lifetime, communication bandwidth, transmission rand, and finally the limited energy issue, so we will
introduce their algorithms and discuss how did they propose to solve such of these challenges and finally
we will do some evaluation to each approach.
GRAPH THEORETIC ROUTING ALGORITHM (GTRA) FOR MOBILE AD-HOC NETWORKS (MANET)graphhoc
Battlefield theater applications require supporting large number of nodes. It can facilitate many multi-hop
paths between each source and destination pairs. For scalability, it is critical that for supporting network
centric applications with large set of nodes require hierarchical approach to designing networks. In this
research we consider using Mobile Ad Hoc Network (MANET) with multiple clusters. Each cluster
supports a few nodes with a cluster head. The intra-cluster connectivity amongst the nodes within the
cluster is supported by multi-hop connectivity to ensure handling mobility in such a way that no service
disruption can occur. The inter-cluster connectivity is also achieved by multi-hop connectivity. However,
for inter-cluster communications, only cluster heads are connected. The selection of intra-cluster
communications and inter-cluster communications allow scalability of the network to support multiservices
applications end-to-end with a desired Quality of Service (QoS). This paper proposes graph
theoretic approach to establish efficient connection between a source and a destination within each cluster
in intra-cluster network and between clusters in inter-cluster network. Graph theoretic approach
traditionally was applied networks where nodes are static or fixed. In this paper, we have applied the
graph theoretic routing to MANET where nodes are mobile. One of the important challenges in MANET is
to support an efficient routing algorithm for multi-hop communications across many nodes which are
dynamic in nature. However, dynamic behavior of the nodes requires greater understanding of the node
degree and mobility at each instance of time in order to maintain end-to-end QoS for multi-service
provisioning. This paper demonstrates graph theoretic approach produces an optimum multi-hop
connectivity path based on cumulative minimum degree that minimizes the contention and scheduling
delay end-to-end. It is applied to both intra-cluster communications as well as inter-cluster
communications. The performance shows that having a multi-hop connectivity for intra-cluster
communications is more power efficient compared to broadcast of information with maximum power
coverage. Each cluster performs similarly and the algorithm is also used for inter-cluster communications.
Our simulation results show that the proposed graph theoretic routing approach will reduce the overall
delay and improves the physical layer data frame transmission.
Quality of Service Routing in Mobile Ad hoc Networks Using Node Mobility and ...IJNSA Journal
Exceptionally dynamic networks are Mobile Ad hoc Networks. Quality of Service (QoS) routing in such
Networks are frequently limited by the network split due to either energy depletion or node mobility of the
mobile nodes. In addition, to fulfill specific quality parameters, existence of multiple node-disjoint paths
becomes essential. Such paths assist in the optimal traffic distribution and consistency in case of path
breakages. Thus, to accommodate such problem, we present a node-disjoint multipath protocol. The metric
system of measurement used to select the paths takes into account the stability of the nodes and the
equivalent links.
Mobile ad hoc network is a reconfigurable network of mobile nodes connected by multi-hop wireless links and capable of operating without any fixed infrastructure support. In order to facilitate communication within such self-creating, self-organizing and self administrating network, a dynamic routing protocol is needed. The primary goal of such an ad hoc network routing protocol is to discover and establish a correct and efficient route between a pair of nodes so that messages may be delivered in a timely manner. Route construction should be done with a minimum of overhead and bandwidth consumption. This paper examines two routing protocols, both on-demand source routing, for mobile ad hoc networks– the Dynamic Source Routing (DSR), an flat architecture based and the Cluster Based Routing Protocol (CBRP), a cluster architecture based and evaluates both routing protocols in terms of packet delivery fraction, normalized routing load, average end to end delay, throughput by varying number of nodes per sq. km, traffic sources and mobility. Simulation results show that in high
mobility (pause time 0s) scenarios, CBRP outperforms DSR. CBRP scales well with increasing number of nodes.
Tree Based Proactive Source Routing Protocol for MANETspaperpublications3
bstract: A mobile adhoc network (MANET) is a wireless communication network and the node that does not lie within the direct transmission range of each other depends on the intermediate nodes to forward data. Opportunistic data forwarding has not been widely utilized in mobile adhoc networks (MANETs) and the main reason is the lack of an efficient lightweight proactive routing scheme with strong source routing capability. PSR protocol facilitates opportunistic data forwarding in MANETs. In PSR, each node maintains a breadth-first search spanning tree of the network rooted at it-self. This information is periodically exchanged among neighboring nodes for updated network topology information. Here added a Mobile sink to reduce the overhead in case of number of child node increases and also to reduce the delay.
Influence of Clustering on the Performance of MobileAd Hoc Networks (MANETs)Narendra Singh Yadav
Clustering is an important research area for mobile ad hoc networks (MANETs) as it increases the capacity of network, reduces the routing overhead and makes the network more scalable in the presence of both high mobility and a large number of mobile nodes. Routing protocols based on flat topology are not scalable because of their built-in characteristics. However, clustering cause overhead which consumes considerable bandwidth, drain mobile nodes energy quickly, likely cause congestion, collision and data delay in larger networks. This paper uses an implementation of the Dynamic Source Routing (DSR), an flat architecture based and the Cluster Based Routing Protocol (CBRP), a cluster architecture based routing protocol to examine the influence of clustering on the performance of mobile ad hoc networks. This paper evaluates channel utilization and control overhead as a function of number of nodes per sq. km to show the effect of clustering. Simulation results show that in high mobility scenarios, CBRP outperforms DSR. CBRP scales well with increasing number of nodes.
MANET Routing Protocols , a case studyRehan Hattab
L. Yi, Y. Zhai, Y. Wang, J. Yuan and I. You , Impacts of Internal Network Contexts on Performance of MANET Routing Protocols: a Case Study, Sixth International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing,2012.
International Journal of Engineering Research and Applications (IJERA) aims to cover the latest outstanding developments in the field of all Engineering Technologies & science.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Consistent Data Release in MANET Using Light Weight Verification Algorithm wi...IJCERT
IJCERT Standard on-line Journal
ISSN(Online):2349-7084,(An ISO 9001:2008 Certified Journal)
iso nicir csir
http://www.ijcert.org offers Discount for Indian research Scholars
IJCERT (ISSN 2349–7084 (Online)) is approved by National Science Library (NSL), National Institute of Science Communication And Information Resources (NISCAIR), Council of Scientific and Industrial Research, New Delhi, India.
An Enhanced DSR Protocol for Improving QoS in MANETKhushbooGupta145
Ad hoc network is a network without centralized administration in which different users can communicate and exchange information. In such a structure, all the nodes participate in order to achieve the network and ensure the travel of the information. Hence, multihopping techniques are used to achieve this task. The communication reliability within an ad hoc network and how the different nodes act are managed by routing protocols. Nowadays, different types of protocols exist. Nevertheless, the source routing ones, based on information known at the source of the communication, seem to attract more studies. Source routing protocols had shown interesting results in realistic scenarios in areas such as military battlefields or airport stations.
This Paper deals with DSR Protocol and is focused on the multipath aspect of this routing protocol. Since, it is necessary to understand that multipath techniques enhance reliability and can ensure security. We have simulated a new multipath algorithm. The solution had been evaluated with the network Simulator 2. Since we want to know how our protocol reacts in different mobility cases, the random waypoint model which allows us to present relevant results, due to the fact this situation is taken into account.
Simulation results show that the multipath protocol behaves better than DSR, the main actual reactive protocol. The Proposed protocol MSR performs well in high mobility by using much less overhead than DSR. Additionally, it is interesting to see that DSR without any modifications manage poorly in high mobility situation.
EFFICIENT PACKET DELIVERY APPROACH FOR ADHOC WIRELESS NETWORKS cscpconf
A wireless ad-hoc network is a collection of nodes which are selfconfiguring,
connected by wireless links. The nodes are free to move randomly and
organize themselves arbitrarily; thus, the network's topology may change rapidly and
unpredictably. These kinds of networks are very flexible and they do not require any
existing infrastructure. Therefore, ad-hoc wireless networks are suitable for temporary
communication links. The biggest challenge in these kinds of networks is to find a path
between the communication end points of nodes that are mobile. Due to the limited
transmission range of wireless interfaces, the communication traffic has to be relayed
over several intermediate nodes to enable the communication between two nodes.
Therefore, these kinds of networks are also called multi-hop ad-hoc networks. The
proposed model is designed to improve the problems of real-time event-based
communication. It improves the packet delivery ratio by prior prediction and reduces
end-to-end packet delay. This in turn improves performance of the routing process
significantly and increases the Quality of Service (QoS).
AN EFFECTIVE CONTROL OF HELLO PROCESS FOR ROUTING PROTOCOL IN MANETSIJCNCJournal
In the mobile ad hoc network (MANET) update of link connectivity is necessary to refresh the neighbor tables in data transfer. A existing hello process periodically exchanges the link connectivity information, which is not adequate for dynamic topology. Here, slow update of neighbour table entries causes link failures which affect performance parameter as packet drop, maximum delay, energy consumption, and reduced throughput. In the dynamic hello technique, new neighbour nodes and lost neighbour nodes are used to compute link change rate (LCR) and hello-interval/refresh rate (r). Exchange of link connectivity information at a fast rate consumes unnecessary bandwidth and energy. In MANET resource wastage can be controlled by avoiding the re-route discovery, frequent error notification, and local repair in the entire network. We are enhancing the existing hello process, which shows significant improvement in performance.
INVESTIGATING MULTILAYER OMEGA-TYPE NETWORKS OPERATING WITH THE CUT-THROUGH T...IJCNCJournal
The continuous increase in the complexity of data networks has motivated the development of more effective Multistage Interconnection Networks (MINs) as important factors in providing higher data transfer rates in various switching divisions. In this paper, semi-layer omega-class networks operating with a cut-through forwarding technique are chosen as test-bed subjects for detailed evaluation, and this network architecture is modelled, inspected, and simulated. The results are examined for relevant singlelayer omega networks operating with cut-through or ‘store and forward’ forwarding techniques. Two series of experiments are carried out: one concerns the case of uniform traffic, while the other is related to hotspot traffic. The results quantify the way in which this network outperforms the corresponding singlelayer network architectures for the same network size and buffer size. Furthermore, the effects of the dimensions of the switch elements and their corresponding reliability on the overall interconnection system are investigated, and the complexity and the relevant cost are examined. The data yielded by this investigation can be valuable to MIN engineers and can allow them to achieve more productive networks with lower overall implementation costs.
A NOVEL HYBRID OPPORTUNISTIC SCALABLE ENERGY EFFICIENT ROUTING DESIGN FOR LOW...IJCNCJournal
Opportunistic Routing (OR) scheme increases the transmission reliability despite the lossy wireless radio links by exploiting the broadcast nature of the wireless medium. However, OR schemes in low power Wireless Sensor Network (WSN) leads to energy drain in constrained sensor nodes due to constant
overhearing, periodic beaconing for Neighbourhood Management (NM) and increase in packet header length to append priority wise sorted Forwarding Candidates Set (FCS) prior to data transmission. The timer-based coordination mechanism incurs the least overhead to coordinate among the FCS that has successfully received the data packet for relaying the data in a multi-hop manner. This timer-based mechanism suffers from duplicate transmissions if the FCS is either not carefully selected or coordinated. The focus of this work is to propose a hybrid opportunistic energy efficient routing design for large scale, low power and lossy WSN. This design avoids periodic 'hello' beacons for NM, limits constant overhearing and increase in packet header length. There are two modes of operation i) opportunistic ii) unicast mode. The sender node adopts opportunistic forwarding for its initial data packet transmission and instead of pre-computing the FCS, it is dynamically computed in a completely distributed manner. The
eligible nodes to be part of FCS will be neighbour nodes at lower corona level than the sender with respect to the sink and remaining energy above the minimum threshold. The nodes part of FCS based on crosslayered multi-metrics and fuzzy decision logic determines its priority level to compute Dynamic Holding
Delay (DHD) for effective timer coordination. The differentiated back off implementation along with DHD enables the higher priority candidate that had received data packet to forward the packet first and facilitates others to cancel its timer upon overhearing. The sender node switches to unicast mode of
forwarding for successive transmissions by choosing the forwarding node with maximum trust value as it
denotes the stability of the temporally varying link with respect to the forwarder. The sender node will revert to opportunistic mode to increase transmission reliability in case of link-level transmission error or no trustworthy forwarders. Simulation results in NS2 show significant increase in Packet Delivery Ratio (PDR),decrease in both average energy consumption per node and Normalized Energy Consumption (NEC) per packet in comparison with existing protocols.
Destination Aware APU Strategy for Geographic Routing in MANETEditor IJCATR
In this paper, we have explained the Enhanced Adaptive Position Update strategy for geographic routing in mobile ad hoc
network In Adaptive Position Update strategy, there are two techniques: Mobility prediction rule and On-demand learning rule. Proposed
system is based on the destination aware routing in which path to transfer the data over the network is based on the distance from highly
stable node to the destination node. Results of the proposed system are compared with Periodic Beaconing on the basis of packet delivery
ratio, beacon overhead, energy consumption. Experiment results show a high improvement in results on the parameters energy
consumption, packet delivery ratio and beacon overhead. Proposed work is implemented on the NS2 (Network Simulator) Environment
to perform experiments.
A scalable and power efficient solution for routing in mobile ad hoc network ...ijmnct
Mobile Ad Hoc Network (MANET) is a very dynamic and infrastructure-less ad hoc network. The actual
network size depends on the application and the protocols developed for the routing for this kind of
networks should be scalable. MANET is a resource limited network and therefore the developed routing
algorithm for packet transmission should be power and bandwidth efficient. These kinds of dynamic
networks should operate with minimal management overhead. The management functionality of the
network increases with number of nodes and reduces the performance of the network. Here, in this paper,
we have designed all identical nodes in the cluster except the cluster head and this criterion reduces the
management burden on the network. Graph theoretic routing algorithm is used to develop route for packet
transmission by using the minimum resources. In this paper, we developed routing algorithm for cluster
based MANET and finds a path from source to destination using minimum cumulative degree path. Our
simulation results show that this routing algorithm provide efficient routing path with the increasing
number of nodes and uses multi-hop connectivity for intra-cluster to utilize minimum power for packet
transmission irrespective of number of nodes in the network.
Mobile environment pretense a number of novel
theoretical and optimization issues such as position, operation
and following in that a lot of requests rely on them for
desirable information. The precedent works are sprinkled
across the entire network layer: from the medium of physical
to link layer to routing and then application layer. In this
invention, we present outline solutions in Medium Access
Control (MAC), data distribution, coverage resolve issues
under mobile ad-hoc network environment based on
congestion control technique using Transmission Control
Protocol (TCP). In mobile ad-hoc network issues can arise
such as link disconnections, channel contention and recurrent
path loss. To resolve this issue, we propose a Cross Layer
based Hybrid fuzzy ad-hoc rate based Congestion Control
(CLHCC) approach to maximize network performance. Based
on the destination report it regulates the speed of data flow to
control data loss by monitoring the present network status
and transmits this report to the source as advice. The source
adjusts the sending flow rate as per the advice. This is
monitored by channel usage, ultimate delay, short term
throughput.
IMPLEMENTATION AND COMPARISION OF DATA LINK QUALITY SCHEME ON ODMRP AND ADMR ...ijngnjournal
An ad hoc network is a collection of wireless mobile nodes dynamically forming a temporary network without the use of any fixed network infrastructure or centralized administration. In order to enable communication within the network, a routing protocol is needed to discover routes between nodes. The primary goal of ad hoc network routing protocols is to establish routes between node pairs so that messages may be delivered reliably and in a timely manner. The objective of any routing protocol is to have packet delivered with least possible cost in terms of receiving power, transmission power, battery energy consumption and distance. All these factors basically effect the establishment of link between the mobile nodes and liability and stability of these links. In this paper, we implement a data link quality scheme on two protocols ODMRP and ADMR and compare them on the bases link quality and link stability.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
Quadrant Based DIR in CWin Adaptation Mechanism for Multihop Wireless NetworkIJCI JOURNAL
In Multihop Wireless Networks, traffic forwarding capability of each node varies according to its level of contention. Each node can yield its channel access opportunity to its neighbouring nodes, so that all the nodes can evenly share the channel and have similar forwarding capability. In this manner the wireless channel is utilized effectively, which is achieved using Contention Window Adaptation Mechanism (CWAM). This mechanism achieves a higher end-to-end throughout but consumes the network power to a higher level. So, a newly proposed algorithm Quadrant- Based Directional Routing Protocol (Q-DIR) is implemented as a cross-layer with CWAM, to reduce the total network power consumption through limited flooding and also reduce the routing overheads, which eventually increases overall network throughput. This algorithm limits the broadcast region to a quadrant where the source node and the destination nodes are located. Implementation of the algorithm is done in Linux based NS-2 simulator
Rough set based QoS enabled multipath source routing in MANET IJECEIAES
The single constrained Quality of Service (QoS) routing in Mobile Ad-hoc NETwork (MANET) is disastrous in consideration of MANET characteristics, inference, collision and link failure as it maintains a single path. The QoS enabled routing yields better packet delivery and maintains consistency among nodes in the network by incorporating multi-constrained and multipath routing. The Dynamic Source Routing (DSR) is best suited source routing algorithm to maintain multipath information at the source node, but performance degrades with larger number of mobile nodes. Multilayer mechanism should be incorporated to maintain QoS metric information spreads across multiple layers of TCP/IP protocol stack. The proposed multipath QoS enabled source routing provides balanced routing by making use of all these features. The imprecise decision making strategy called Rough Set Theory (RST) is used at destination node for decision making. The Route REQuest (RREQ) messages coming from different routes are filtered by considering the QoS metrics of each and every route by making use of RST. The Route REPly (RREP) messages are generated and delivered to the source node for filtered RREQ messages. The proposed routing algorithm will reduce load on the network by reducing number of control messages exchanged for route establishment. This will evenly distribute load among all the nodes and it also avoid the scenarios like few nodes starved for resources. Finally, multipath routing always provides alternate routing option in case of route failure.
MANET Routing Protocols , a case studyRehan Hattab
L. Yi, Y. Zhai, Y. Wang, J. Yuan and I. You , Impacts of Internal Network Contexts on Performance of MANET Routing Protocols: a Case Study, Sixth International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing,2012.
International Journal of Engineering Research and Applications (IJERA) aims to cover the latest outstanding developments in the field of all Engineering Technologies & science.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Consistent Data Release in MANET Using Light Weight Verification Algorithm wi...IJCERT
IJCERT Standard on-line Journal
ISSN(Online):2349-7084,(An ISO 9001:2008 Certified Journal)
iso nicir csir
http://www.ijcert.org offers Discount for Indian research Scholars
IJCERT (ISSN 2349–7084 (Online)) is approved by National Science Library (NSL), National Institute of Science Communication And Information Resources (NISCAIR), Council of Scientific and Industrial Research, New Delhi, India.
An Enhanced DSR Protocol for Improving QoS in MANETKhushbooGupta145
Ad hoc network is a network without centralized administration in which different users can communicate and exchange information. In such a structure, all the nodes participate in order to achieve the network and ensure the travel of the information. Hence, multihopping techniques are used to achieve this task. The communication reliability within an ad hoc network and how the different nodes act are managed by routing protocols. Nowadays, different types of protocols exist. Nevertheless, the source routing ones, based on information known at the source of the communication, seem to attract more studies. Source routing protocols had shown interesting results in realistic scenarios in areas such as military battlefields or airport stations.
This Paper deals with DSR Protocol and is focused on the multipath aspect of this routing protocol. Since, it is necessary to understand that multipath techniques enhance reliability and can ensure security. We have simulated a new multipath algorithm. The solution had been evaluated with the network Simulator 2. Since we want to know how our protocol reacts in different mobility cases, the random waypoint model which allows us to present relevant results, due to the fact this situation is taken into account.
Simulation results show that the multipath protocol behaves better than DSR, the main actual reactive protocol. The Proposed protocol MSR performs well in high mobility by using much less overhead than DSR. Additionally, it is interesting to see that DSR without any modifications manage poorly in high mobility situation.
EFFICIENT PACKET DELIVERY APPROACH FOR ADHOC WIRELESS NETWORKS cscpconf
A wireless ad-hoc network is a collection of nodes which are selfconfiguring,
connected by wireless links. The nodes are free to move randomly and
organize themselves arbitrarily; thus, the network's topology may change rapidly and
unpredictably. These kinds of networks are very flexible and they do not require any
existing infrastructure. Therefore, ad-hoc wireless networks are suitable for temporary
communication links. The biggest challenge in these kinds of networks is to find a path
between the communication end points of nodes that are mobile. Due to the limited
transmission range of wireless interfaces, the communication traffic has to be relayed
over several intermediate nodes to enable the communication between two nodes.
Therefore, these kinds of networks are also called multi-hop ad-hoc networks. The
proposed model is designed to improve the problems of real-time event-based
communication. It improves the packet delivery ratio by prior prediction and reduces
end-to-end packet delay. This in turn improves performance of the routing process
significantly and increases the Quality of Service (QoS).
AN EFFECTIVE CONTROL OF HELLO PROCESS FOR ROUTING PROTOCOL IN MANETSIJCNCJournal
In the mobile ad hoc network (MANET) update of link connectivity is necessary to refresh the neighbor tables in data transfer. A existing hello process periodically exchanges the link connectivity information, which is not adequate for dynamic topology. Here, slow update of neighbour table entries causes link failures which affect performance parameter as packet drop, maximum delay, energy consumption, and reduced throughput. In the dynamic hello technique, new neighbour nodes and lost neighbour nodes are used to compute link change rate (LCR) and hello-interval/refresh rate (r). Exchange of link connectivity information at a fast rate consumes unnecessary bandwidth and energy. In MANET resource wastage can be controlled by avoiding the re-route discovery, frequent error notification, and local repair in the entire network. We are enhancing the existing hello process, which shows significant improvement in performance.
INVESTIGATING MULTILAYER OMEGA-TYPE NETWORKS OPERATING WITH THE CUT-THROUGH T...IJCNCJournal
The continuous increase in the complexity of data networks has motivated the development of more effective Multistage Interconnection Networks (MINs) as important factors in providing higher data transfer rates in various switching divisions. In this paper, semi-layer omega-class networks operating with a cut-through forwarding technique are chosen as test-bed subjects for detailed evaluation, and this network architecture is modelled, inspected, and simulated. The results are examined for relevant singlelayer omega networks operating with cut-through or ‘store and forward’ forwarding techniques. Two series of experiments are carried out: one concerns the case of uniform traffic, while the other is related to hotspot traffic. The results quantify the way in which this network outperforms the corresponding singlelayer network architectures for the same network size and buffer size. Furthermore, the effects of the dimensions of the switch elements and their corresponding reliability on the overall interconnection system are investigated, and the complexity and the relevant cost are examined. The data yielded by this investigation can be valuable to MIN engineers and can allow them to achieve more productive networks with lower overall implementation costs.
A NOVEL HYBRID OPPORTUNISTIC SCALABLE ENERGY EFFICIENT ROUTING DESIGN FOR LOW...IJCNCJournal
Opportunistic Routing (OR) scheme increases the transmission reliability despite the lossy wireless radio links by exploiting the broadcast nature of the wireless medium. However, OR schemes in low power Wireless Sensor Network (WSN) leads to energy drain in constrained sensor nodes due to constant
overhearing, periodic beaconing for Neighbourhood Management (NM) and increase in packet header length to append priority wise sorted Forwarding Candidates Set (FCS) prior to data transmission. The timer-based coordination mechanism incurs the least overhead to coordinate among the FCS that has successfully received the data packet for relaying the data in a multi-hop manner. This timer-based mechanism suffers from duplicate transmissions if the FCS is either not carefully selected or coordinated. The focus of this work is to propose a hybrid opportunistic energy efficient routing design for large scale, low power and lossy WSN. This design avoids periodic 'hello' beacons for NM, limits constant overhearing and increase in packet header length. There are two modes of operation i) opportunistic ii) unicast mode. The sender node adopts opportunistic forwarding for its initial data packet transmission and instead of pre-computing the FCS, it is dynamically computed in a completely distributed manner. The
eligible nodes to be part of FCS will be neighbour nodes at lower corona level than the sender with respect to the sink and remaining energy above the minimum threshold. The nodes part of FCS based on crosslayered multi-metrics and fuzzy decision logic determines its priority level to compute Dynamic Holding
Delay (DHD) for effective timer coordination. The differentiated back off implementation along with DHD enables the higher priority candidate that had received data packet to forward the packet first and facilitates others to cancel its timer upon overhearing. The sender node switches to unicast mode of
forwarding for successive transmissions by choosing the forwarding node with maximum trust value as it
denotes the stability of the temporally varying link with respect to the forwarder. The sender node will revert to opportunistic mode to increase transmission reliability in case of link-level transmission error or no trustworthy forwarders. Simulation results in NS2 show significant increase in Packet Delivery Ratio (PDR),decrease in both average energy consumption per node and Normalized Energy Consumption (NEC) per packet in comparison with existing protocols.
Destination Aware APU Strategy for Geographic Routing in MANETEditor IJCATR
In this paper, we have explained the Enhanced Adaptive Position Update strategy for geographic routing in mobile ad hoc
network In Adaptive Position Update strategy, there are two techniques: Mobility prediction rule and On-demand learning rule. Proposed
system is based on the destination aware routing in which path to transfer the data over the network is based on the distance from highly
stable node to the destination node. Results of the proposed system are compared with Periodic Beaconing on the basis of packet delivery
ratio, beacon overhead, energy consumption. Experiment results show a high improvement in results on the parameters energy
consumption, packet delivery ratio and beacon overhead. Proposed work is implemented on the NS2 (Network Simulator) Environment
to perform experiments.
A scalable and power efficient solution for routing in mobile ad hoc network ...ijmnct
Mobile Ad Hoc Network (MANET) is a very dynamic and infrastructure-less ad hoc network. The actual
network size depends on the application and the protocols developed for the routing for this kind of
networks should be scalable. MANET is a resource limited network and therefore the developed routing
algorithm for packet transmission should be power and bandwidth efficient. These kinds of dynamic
networks should operate with minimal management overhead. The management functionality of the
network increases with number of nodes and reduces the performance of the network. Here, in this paper,
we have designed all identical nodes in the cluster except the cluster head and this criterion reduces the
management burden on the network. Graph theoretic routing algorithm is used to develop route for packet
transmission by using the minimum resources. In this paper, we developed routing algorithm for cluster
based MANET and finds a path from source to destination using minimum cumulative degree path. Our
simulation results show that this routing algorithm provide efficient routing path with the increasing
number of nodes and uses multi-hop connectivity for intra-cluster to utilize minimum power for packet
transmission irrespective of number of nodes in the network.
Mobile environment pretense a number of novel
theoretical and optimization issues such as position, operation
and following in that a lot of requests rely on them for
desirable information. The precedent works are sprinkled
across the entire network layer: from the medium of physical
to link layer to routing and then application layer. In this
invention, we present outline solutions in Medium Access
Control (MAC), data distribution, coverage resolve issues
under mobile ad-hoc network environment based on
congestion control technique using Transmission Control
Protocol (TCP). In mobile ad-hoc network issues can arise
such as link disconnections, channel contention and recurrent
path loss. To resolve this issue, we propose a Cross Layer
based Hybrid fuzzy ad-hoc rate based Congestion Control
(CLHCC) approach to maximize network performance. Based
on the destination report it regulates the speed of data flow to
control data loss by monitoring the present network status
and transmits this report to the source as advice. The source
adjusts the sending flow rate as per the advice. This is
monitored by channel usage, ultimate delay, short term
throughput.
IMPLEMENTATION AND COMPARISION OF DATA LINK QUALITY SCHEME ON ODMRP AND ADMR ...ijngnjournal
An ad hoc network is a collection of wireless mobile nodes dynamically forming a temporary network without the use of any fixed network infrastructure or centralized administration. In order to enable communication within the network, a routing protocol is needed to discover routes between nodes. The primary goal of ad hoc network routing protocols is to establish routes between node pairs so that messages may be delivered reliably and in a timely manner. The objective of any routing protocol is to have packet delivered with least possible cost in terms of receiving power, transmission power, battery energy consumption and distance. All these factors basically effect the establishment of link between the mobile nodes and liability and stability of these links. In this paper, we implement a data link quality scheme on two protocols ODMRP and ADMR and compare them on the bases link quality and link stability.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
Quadrant Based DIR in CWin Adaptation Mechanism for Multihop Wireless NetworkIJCI JOURNAL
In Multihop Wireless Networks, traffic forwarding capability of each node varies according to its level of contention. Each node can yield its channel access opportunity to its neighbouring nodes, so that all the nodes can evenly share the channel and have similar forwarding capability. In this manner the wireless channel is utilized effectively, which is achieved using Contention Window Adaptation Mechanism (CWAM). This mechanism achieves a higher end-to-end throughout but consumes the network power to a higher level. So, a newly proposed algorithm Quadrant- Based Directional Routing Protocol (Q-DIR) is implemented as a cross-layer with CWAM, to reduce the total network power consumption through limited flooding and also reduce the routing overheads, which eventually increases overall network throughput. This algorithm limits the broadcast region to a quadrant where the source node and the destination nodes are located. Implementation of the algorithm is done in Linux based NS-2 simulator
Rough set based QoS enabled multipath source routing in MANET IJECEIAES
The single constrained Quality of Service (QoS) routing in Mobile Ad-hoc NETwork (MANET) is disastrous in consideration of MANET characteristics, inference, collision and link failure as it maintains a single path. The QoS enabled routing yields better packet delivery and maintains consistency among nodes in the network by incorporating multi-constrained and multipath routing. The Dynamic Source Routing (DSR) is best suited source routing algorithm to maintain multipath information at the source node, but performance degrades with larger number of mobile nodes. Multilayer mechanism should be incorporated to maintain QoS metric information spreads across multiple layers of TCP/IP protocol stack. The proposed multipath QoS enabled source routing provides balanced routing by making use of all these features. The imprecise decision making strategy called Rough Set Theory (RST) is used at destination node for decision making. The Route REQuest (RREQ) messages coming from different routes are filtered by considering the QoS metrics of each and every route by making use of RST. The Route REPly (RREP) messages are generated and delivered to the source node for filtered RREQ messages. The proposed routing algorithm will reduce load on the network by reducing number of control messages exchanged for route establishment. This will evenly distribute load among all the nodes and it also avoid the scenarios like few nodes starved for resources. Finally, multipath routing always provides alternate routing option in case of route failure.
ECA MODEL BASED QOS AODV ROUTING FOR MANETSIJCNCJournal
Applications like banking, interactive multimedia, movie on demand, VOIP, etc., are delay sensitive by
nature. The QoS given to users will be affected by network delay, which can be mitigated by employing
QoS routing and efficient data transfer. To build routing table, normal AODV routing uses flooding
technique, which will not consider QoS requirements. Hence QoS based routing which is stable for the
entire application is essential, which understands the dynamic nature of the MANET and establishes the
required route, in minimum possible time. We have proposed an intelligent routing protocol based ECA
model and AODV for establishing QoS route.
The simulation results shows that the ECA model gives better results, while considering the local
connectivity time, source to destination connectivity time, number of data packets successfully delivered to
the destination, local and global error correction time, compared to AODV.
Integrated Resource Adaptive On Demand Geographic Routing (IRA-ODGR) for MANETijsrd.com
It is a big challenge to develop routing protocol that can meet different application needs and optimize routing paths according to the topology change in mobile ad hoc networks. The existing work presented two self-adaptive on-demand geographic routing schemes to build efficient paths based on the needs of user applications and adapt to various scenarios for provide efficient and reliable routing. To overcome the impact due to inaccurate local topology knowledge, the topology information is updated at a node in the specific time periods. The on-demand routing mechanism reduces to control overhead made on geographic routing. The route optimization scheme adapts routing path according to the topology changes and actual data traffic requirements. Adaptive parameter setting scheme is introduced to allow each node to determine and adjust the protocol parameter values independently. However, existing work did not address resource parameters such as energy, bandwidth and data loss. The proposal presents and Integrated Resource Adaptive on Demand Geographic Routing (IRA-ODGR) for MANET. The node energy resource is optimized with path energy consumption rate and bandwidth utilization of the path is analysed. Loss rate is reduced in geographic routing with dynamic routes. The simulation conducted to demonstrate IRA-ODGR routing protocols.
LOAD BALANCING AND PROVIDING SECURITY USING RSA IN WIRELESS SENSOR NETWORKSIJARIIT
This paper presents load balancing and provides security using RSA algorithm. This is brief introduction to handle the traffic on node. This represents the converge-casting protocol in wireless sensor networks. The protocol is localized and distributed, and adapts efficiently to vary traffic. Graphs are analyzed using NS-2 simulator, here end-to-end packet latency, packet delivery ratio, throughput are analyzed. This is done for 30 nodes in NS-2 simulation.
Adaptive QoS Multicast Routing with Mobility Prediction in MANETs ijasuc
A Mobile Ad hoc NETwork (MANET) is a collection of wireless mobile hosts that form a temporary network
without a centralized administration or wired infrastructure. Due to the high mobility of nodes, the network
topology of MANETs changes very fast, making it more difficult to find the routes that message packets use.
Network control with Quality of Service (QoS) support is a key issue for multimedia applications in MANET.
Most of the real time applications have stringent requirements on bandwidth, delay, delay-jitter, packet loss
ratio, cost and other QoS metrics. This paper proposes a Multi-constrained QoS routing with mobility
prediction protocol. If the node has enough resources to transmit data packets, it uses the Global
Positioning System (GPS) to get the location information of the mobile nodes and selects the routing path
with the maximum Route Expiration Time (RET). A set of static and mobile agents are used to find the
multicast routes and transmit the packets. Extensive simulations have been conducted to evaluate the
performance of MC_MAODV using Network Simulator (NS-2). The simulation results show that the
proposed protocol achieves good performance in terms of improving packet delivery ratio and minimizing
end-to-end delay.
Quality of Service Routing in Mobile Ad hoc Networks Using Node Mobility and ...IJNSA Journal
Exceptionally dynamic networks are Mobile Ad hoc Networks. Quality of Service (QoS) routing in such Networks are frequently limited by the network split due to either energy depletion or node mobility of the mobile nodes. In addition, to fulfill specific quality parameters, existence of multiple node-disjoint paths becomes essential. Such paths assist in the optimal traffic distribution and consistency in case of path breakages. Thus, to accommodate such problem, we present a node-disjoint multipath protocol. The metric system of measurement used to select the paths takes into account the stability of the nodes and the equivalent links.
Abstract— A MANETs is a self-configuring network is a collection of mobile hosts that are connected via a wireless link. Opportunistic data forwarding has drawn much attention in the research community of multihop wireless networks. Opportunistic data forwarding is the lack of an efficient, lightweight proactive routing scheme with strong source routing capability. In this project proposed to a lightweight proactive source routing (PSR) protocol. PSR can be maintained at different network topology information than distance vector (DV), link state (LS), optimized link State routing (OLSR), then reactive source routing [e.g., dynamic source routing (DSR)]. In this project concentrate on reducing the overhead at the base line protocols, then testing to the better data transportation. Network Simulator (NS-2) help in testing and implementing to this project for effectively reduced to the overhead in the data transportation.
SNR/RP Aware Routing Algorithm: Cross-Layer Design for MANETSijwmn
Routing in MANET is complex due to the fact that the network graph is episodically connected and nodes get only intermittently connected because of nodes mobility, terrain, weather, and jamming that change topology rapidly. In this paper, we propose cross-layer design to achieve a reliable data transmission in MANET. A key challenge is to create a mechanism that can provide good delivery performance and high quality of service in intermittent networks. The key components of our approach include a cross-layer design (CLD) to improve information sharing between different protocol layers. In order to improve the end-to-end performance of MANET, we present mechanism that allows the network layer to adjust its routing protocol dynamically based on SNR and Received Power along the end-to-end routing path for each transmission link. We evaluate our approach using one of common MANET routing protocols, DSR, to illustrate that our CLD improved the performance of DSR.
SNR/RP Aware Routing Algorithm: Cross-Layer Design for MANETSijwmn
Routing in MANET is complex due to the fact that the network graph is episodically connected and nodes get only intermittently connected because of nodes mobility, terrain, weather, and jamming that change topology rapidly. In this paper, we propose cross-layer design to achieve a reliable data transmission in MANET. A key challenge is to create a mechanism that can provide good delivery performance and high quality of service in intermittent networks. The key components of our approach include a cross-layer design (CLD) to improve information sharing between different protocol layers. In order to improve the end-to-end performance of MANET, we present mechanism that allows the network layer to adjust its routing protocol dynamically based on SNR and Received Power along the end-to-end routing path for each transmission link. We evaluate our approach using one of common MANET routing protocols, DSR, to illustrate that our CLD improved the performance of DSR
Packet Transfer Rate & Robust Throughput for Mobile Adhoc NetworkEswar Publications
An ad-hoc wireless network is highly different considering dynamic stochastic process of its underlying links, leads to link breaks during data transaction. Hence, to provide free flow data transaction, many routing algorithms have the property of link recovery and maintenance procedures to minimize the loss of data during transmission. However these routing method do not guarantee reliable data transmission in some special application conditions with wide requirements on Packet delivery ratio and link quality of the network. Routing is a critical issue in MANET and hence the focus of this paper is the performance analysis of different routing protocols used in the
wireless network. We evaluate the ability of a mobile ad hoc wireless network to distribute flows across robust routes by introducing the robust throughput measure as a performance metric. The utility gained by the delivery of flow messages is based on the level of interruption experienced by the underlying transaction. We describe the mathematical calculation of a network’s robust throughput measure, as well as its robust throughput capacity. We introduce the robust flow admission and routing algorithm (RFAR) to provide for the timely and robust transport of flow transactions across mobile ad hoc wireless systems.
Improved routing scheme with ACO in WSN in comparison to DSDVijsrd.com
Routing is the process of selecting best paths in a network in terms of energy and distance. In adhoc it is critical to collect the information in an efficient manner as it has limitations in terms of centralized congestion. In such case to perform the effective communication there is the requirement of some such routing approach that can provide the routing with optimized path. In this work, ACO based routing approach is defined to generate the optimized path in comparison to DSDV over the network. The presented approach is implemented in matlab environment and obtained results shows the effective results in terms of optimized path.
Quality of Service Routing in Mobile Ad Hoc Networks Using Location and Energ...ijwmn
Mobile Ad hoc Networks are highly dynamic networks. Quality of Service (QoS) routing in such networks is usually limited by the network breakage due to either node mobility or energy depletion of the mobile nodes. Also, to fulfill certain quality parameters, presence of multiple node-disjoint paths becomes essential. Such paths aid in the optimal traffic distribution and reliability in case of path breakages. Thus, to cater such problem, we present a node-disjoint multipath protocol. The metric used to select the paths takes into account the stability of the nodes and the corresponding links. The proposed technique is also illustrated with an example.
AN EFFICIENT AND STABLE ROUTING ALGORITHM IN MOBILE AD HOC NETWORKIJCNCJournal
Mobile Ad hoc Network (MANET) is mainly designed to set up communication among devices in infrastructure-less wireless communication network. Routing in this kind of communication network is highly affected by its restricted characteristics such as frequent topological changes and limited battery power. Several research works have been carried out to improve routing performance in MANET. However, the overall performance enhancement in terms of packet delivery, delay and control message overhead is still not come into the wrapping up. In order to overcome the addressed issues, an Efficient and Stable-AODV (EFST-AODV) routing scheme has been proposed which is an improvement over AODV to establish a better quality route between source and destination. In this method, we have modified the route request and route reply phase. During the route request phase, cost metric of a route is calculated on the basis of parameters such as residual energy, delay and distance. In a route reply phase, average residual energy and average delay of overall path is calculated and the data forwarding decision is taken at the source node accordingly. Simulation outcomes reveal that the proposed approach gives better results in terms of packet delivery ratio, delay, throughput, normalized routing load and control message overhead as compared to AODV
An Efficient and Stable Routing Algorithm in Mobile Ad Hoc NetworkIJCNCJournal
Mobile Ad hoc Network (MANET) is mainly designed to set up communication among devices in infrastructure-less wireless communication network. Routing in this kind of communication network is highly affected by its restricted characteristics such as frequent topological changes and limited battery power. Several research works have been carried out to improve routing performance in MANET. However, the overall performance enhancement in terms of packet delivery, delay and control message overhead is still not come into the wrapping up. In order to overcome the addressed issues, an Efficient and Stable-AODV (EFST-AODV) routing scheme has been proposed which is an improvement over AODV to establish a better quality route between source and destination. In this method, we have modified the route request and route reply phase. During the route request phase, cost metric of a route is calculated on the basis of parameters such as residual energy, delay and distance. In a route reply phase, average residual energy and average delay of overall path is calculated and the data forwarding decision is taken at the source node accordingly. Simulation outcomes reveal that the proposed approach gives better results in terms of packet delivery ratio, delay, throughput, normalized routing load and control message overhead as compared to AODV.
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Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
2. Keywords Medium access layer Á Mobile ad hoc network Á Efficient
position-based opportunistic routing Á Position-based routing
1 Introduction
Mobile Ad hoc Network (MANET) deals with number of mobile nodes that are free
to move randomly. This is not in the case of the existing Internet, where the router
topology is fundamentally static in nature (barring router failures or network con-
figuration). In a MANET, the nodes are mobiles and inter-node connectivity may
changes frequently due to dynamic configuration of network topology. In this track,
we focus our attention on current protocols that affords the connectivity of route in
MANET, such as Routing protocols [1]. The challenging problem of MANET
especially the routing approaches where designed efficiently and reliably by uti-
lizing the limited resources. An intellectual routing approach is recommended that
proficiently uses the limited resources. Meanwhile the configuration of routing
needed to adapt to the dynamic changes of network conditions such as network
size, network partitioning, and traffic density [2].
The former interest of wireless networking is infrastructure network (wired
networks). In wired networks, two main algorithms are used and they referred as
link state and distance vector algorithms. In link-state routing algorithm, each of the
Mobile Node (MN) or terminal periodically updates the network status by using a
flooding strategy [3]. The update does by the process of broadcasting the costs- of-
link-state routing of its neighboring nodes to other MNs. When each of the MNs
receives an update packet, thus they update the entire network view and their
link-state information. The Shortest path algorithm of link state provides the next
hop node with the minimal distance from the source node to reach the desired
destination. In distance vector routing, each node updates the network status by a
periodical propagation of signals among the nodes for attaining the distance to
every node [1, 4]. The conventional link-state routing and distance vector routing
algorithm not supported in large MANETs. Due to periodic or frequent changes of
network route updates in large network that may consume adequate resources such
as bandwidth, power consumption that leads to frequent recharge of mobile ter-
minals battery and increases the channel contention.
Conventional topology-based Mobile Ad hoc Network routing protocols is
reasonably prone to node mobility. The crucial reason for occurrences of vulner-
ability is due to the pre determination of routes before data transmission [5, 6].
Owing to the frequent and rapid change of topology leads to hard maintainability of
paths during transmission. Eventually, the discovery and recovery of routes con-
sumes more time that reduces the mobile nodes energy. In this case, if the path
breaks then the data packets will lose or delayed for long time until the reconfig-
uration or reconstruction of the route has handled that causes interruption during the
transmission of data packets.
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3. Geographic routing (GR) utilizes the location information to the purpose of
forwarding data packets, which will utilize the hop-by-hop routing fashion [6]. To
select the next hop forwarder, the Greedy forwarding takes the largest positive
progress toward the destination. In order to trigger the route around communication
voids, void handling mechanism is used. The key aspect of GR ensures the scal-
ability and high efficiency thus the maintenance regarding the end-to-end routes is
not required. However, GR is sensitive to the factual error of location information
[7]. In greedy forwarding, an operation to select the next hop is quite distinct. Here
the neighbor, who is located away from the sender or source that takes up the
position as the next hop. If the node moves away from the coverage area of sender,
it will leads to the transmission failure. A famous Geographic Routing
(GR) protocol is GPSR. In this feedback of MAC-layer failure, offer the chance to
reroute the packet. When node mobility increases, the performance evaluation is
incapable under the simulation. Due to the nature of wireless medium broadcasting,
the transmission of a single packet leads to numerous reception. If this type of
transmission used as backup, then the strength of the routing protocol considered as
enhanced.
In opportunistic routing, the concept of multi-cast routing has already demon-
strated. However, most probably link-state topology DB is used to select and
ensures higher preferences for the forwarding candidates or relay nodes. The
periodic network-wide measurement is required to acquire the loss rates of inter
node and it is impossible because of the dynamic nature of MNs [7]. So far, in these
protocols, the batching tends to delay the data packets and not preferred for delay
sensitive applications [8, 9]. Presently, the location aided opportunistic routing
guided to forward the packets directly by using location information but it’s
designed as of other static mesh networks and aimed to provide the efficient
throughput. However, opportunistic forwarding fails to investigate the robustness of
the network for transmission of data packets [6, 10]. The proposed novel Efficient
Position-based Opportunistic Routing (EPOR) protocol deals the forwarding can-
didates by using the MAC interception for caching the packet that has been received
[7]. If the best forwarder not forwards the packet in an allocated time slot, a then
suboptimal candidate will successfully collects/receives and forward the packets
without any interruption to the data transmission. Thus, EPOR also ensures the
robustness by exploiting per packet basics through multi-path accessing.
2 Routing Algorithm
1. Greedy Perimeter Source Routing (GPSR)
MAC-layer failure feedback: As used in DSR [3], we the data packet exceeds
the limitation of retransmission tries then DSR receives the notification from the
802.11 MAC layer. It excludes the congestive collapse that indicates the
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4. recipient out of the frequency range [6, 10]. If the retry goes beyond the limit,
then it attains the failure of transmission. By using, the MAC- layer failure
feedback may convey the failure state as earlier as possible to the GPSR,
otherwise it carries the task through the neighbor’s expiration timeout interval
(4:5B).
Interface queue traversal: Regarding the MAC- layer feedback, the implemen-
tation expresses the strong result. While an IEEE 802.11 interface continuously
retransmits the data packets at the packets head of its queue. The head-of-line
block normally waits to receive the link-level acknowledgement from the
recipient. This head-of-line block used to reduce the offered transmits cycle of
an interface [8]. In this situation, notification regards the retransmit retry makes
queue of the packet to traverse for the interface and clears out all the failed
transmission recipients addresses [11]. Then it passes all these packets to the
routing protocol for retransmission or re-forwarding to another next hop.
While receiving greedy mode data packet for forwarding, a node looks its
neighbor table for capturing the geographically located closest neighbor to the
desired packet’s destination. If the neighbor is closer to the destination, then the
greedy mode packet forwards the packet to the closest node. Suppose, no
neighbor is closer, then the node marks the packet under the perimeter mode [9].
However, most probably link-state topology DB is used to select and ensures
higher preferences for the forwarding candidates or relay nodes. The periodic
network-wide measurement is required to acquire the loss rates of inter node [9].
It is impossible because of the dynamic nature of MNs. So far, in these pro-
tocols, the batching tends to delay the data packets and not preferred for delay
sensitive applications.
2. Ad Hoc on Demand Multicast Distance Vector Routing (AOMDV)
AOMDV’s many characteristics were shares with AODV. The technique based
on the distance vector routing algorithm, uses an approach as hop-by-hop
routing. Furthermore, AOMDV finds the retransmission routes using a route
discovery procedure [12]. The difference between AOMDV and AODV is
estimates by the discovering the number of routes that establishes in each of the
nodes route discovery to attain the desired destination.
In terms of AOMDV, it broadcast the Route Request (RREQ) from source to
destination. It establishes the multiple reverse paths both at destination node as
well as at intermediate nodes. The reverse path configuration from source to
destination and intermediate node to destination makes multiple forward paths.
The intermediate nodes reverse the path with an alternative path and it is useful
in reducing the frequency of the route discovery. The depth of the AOMDV
protocol ensures the discovery of multiple paths that are disjoint and loop free
[13] and uses a flood-based route discovery, to finds the paths efficiently.
However, it does not involve the special control to the packets [10]. In fact,
AOMDV and AODV cause the overhead due to the extra RREPs and RERRs
for discovery of multipath that harms to maintain in routing control packets (i.e.,
RREQs, RREPs, and RERRs).
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5. 3. Efficient Position-Based Opportunistic Routing
An Efficient Position-based Opportunistic Routing (EPOR) mechanism which
can be organized without any of the complex [14] modification to MAC pro-
tocol and meanwhile achieves the multiple candidate reception without dropping
the additional benefits of collision avoidance [6, 10] that was provided by IEEE
802.11. The scheme of Virtual Destination-based Void Handling (VDVH)
exhibits the advantages of greedy forwarding and opportunistic routing can
achieve the transmission while handling communication voids.
In this paper, EPOR focuses both overhead as well as usage of bandwidth due to
the duplicate relay candidates for transmission also look the utilization of buffer
usage. Through performance analysis, EPOR achieves gain ratio by little
overhead cost due to the proper selection of forwarding candidates among the
area and limitation schemes [9, 14].
A node needs to satisfy the following conditions to locate in the forwarding
region/area:
1. Should achieve the positive progress to reach the destination [7]
2. The distance between the source and next hop relay node should not go
beyond the half of the transmission range (R) (i.e., R/2).
Therefore, all forwarding candidates can hear each other. The key point of
EPOR states that, if an intermediate node receives the same ID (i.e., same source
address and sequence number) [15], then it will drop that packet from the best
forwarder packet list.
4. Opportunistic Forwarding
The design of EPOR depends upon opportunistic forwarding and geographic
routing. The MNs aware their own location and their neighboring positions
directly. The MNs neighborhood location informations are register in the
routing table of each of the MN. Exchange of information uses one–hop beacon
in the packets header [16]. To achieve the desired destination position the
location registration and look up services maps the nodes addresses to locate the
desired destination nodes position as in [6, 10]. In this scenario, location ser-
vices schemes are more reliable and efficient. For example, when the destination
replies to the requested source, destination transmits the reply by acquiring the
long-range radio with low bit rate. It can implement by periodic beacon. When a
source needs to transmit a packet, first, it should collect the destination location
and its address attached with the packet header. Due to the movement of des-
tination node, the true destination diverge the multi hop path and packet may
drop even if the packet delivers to the neighborhood destination. To handle such
issues, optimal check introduced for the destination node. At each stage of
hopping, the nodes that forward the data packet will check its neighbor list to
check whether the destination node presents within its own transmission range.
If so, the packet will transmit directly to the destination node, likewise location
prediction scheme for destination as mentioned in [4].
In opportunistic forwarding, in order to require packet from various candidates,
either it must adapt to any one of the following, an integration of routing or an
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6. IP broadcast and MAC protocol. Foremost, it prone to MAC collision due to the
absence of collision avoidance that supports to broadcast the packets in IEEE
802.11. Later it need a complex coordinates and it is quite difficult to implement.
In EPOR, the similar scheme which was uses in MAC multicast mode explained
in [15]. Here the packet transfer in unicast mode in IP layer (the best
forwarder/relay node which makes the leading positive progress for attaining the
destination and it is set as next hop) and receives the multiple candidates
reception using MAC interception. The significance of RTS/ACK/DATA/CTS
reduces the collision. Due to the medium reservation, all other nodes within the
ranges of sender’s node may overhear (eavesdrop) on the successful transmis-
sion of the packet as a higher probability in ratio.
3 Simulation Results
The performance of EPOR has evaluated and compared with AOMDV and GPSR
in NS-2 simulation. It simulates under a variety of network topologies. The GPSR is
a representative geographic routing protocol and AOMDV is a famous multi-path
routing protocol. The parameters utilized in the NS-2 simulation listed in Table 1.
The model uses the random waypoint for node’s mobility without pause. The speed
of the network mobility degree may vary from minimum to maximum. The mini-
mum speed of the node is set to 1 m/s. The following metrics used for comparison
of performance:
• Packet delivery ratio: The ratio of the number of data packets received at the
destination(s) to the number of data packets sent by the source(s).
• End-to-end delay: The average and median end-to-end delay evaluated together
with the cumulative distribution function of the delay.
• Path length: The average end-to-end path length meant (number of hops) for
successful packet delivery.
• Packet forwarding times per hop (FTH): The average number of time, a packet
has forward from the perspective routing layer to deliver a packet over each hop.
Table 1 Simulation
parameters
Parameters Values
MAC protocol IEEE 802.11
Propagation model Two-ray ground
Transmission range 250 m
Mobility model Random Way Point (RWP)
Traffic type Constant Bit Rate (CBR)
Packet size 512 MB
Number of nodes 100
Simulation time 200 ls
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7. • Packet forwarding times per packet (FTP): The average number of times a
packet has forward from the perspective routing layer to deliver a packet from
the source to the destination.
A. Simulation Parameters
As by Fig. 1, we can observe that in the face of communication hole, GPSR’s void
handling mechanism fails to work well [17] (Figs. 2, 3 and 4).
Even when the maximum node speed is 5 m/s, only 90% of the data packets get
delivered which is relatively poor compared to the other protocols [18]. As for
EPOR, the improvement is not so significant since in the current implementation,
VDVH is unable to deal with all cases of communication voids.
However, when the node mobility is high (e.g., when the maximum node speed
is larger than 25 m/s), EPOR still performs better.
With respect to the path length, the end-to-end hops of GPSR are the largest due
to the usage of perimeter mode, while EPOR still achieves the shortest path length
[19].
0
0.5
1
1.5
2
2.5
5 10 15 20 25 30
GPSR
EPOR
AOMDV
Fig. 1 Packet delivery ratio
for communication hole
0
0.2
0.4
0.6
0.8
1
1.2
1.4
5 10 15 20 25 30
GPSR
AOMDV
EPOR
Fig. 2 Average end-to-end
delay for communication hole
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8. As for the result of FTH and FTP (Figs. 5 and 6), EPOR outperforms the other
two as usual while GPSR performs worst indicating the perimeter mode of GPSR is
incapable of working well in mobile environment (Figs. 7 and 8)
0
5
10
15
20
25
30
35
40
5 10 15 20 25 30
EPOR
AOMDV
GPSR
Fig. 3 Median end-to-end
delay for communication hole
0
5
10
15
20
25
5 10 15 20 25 30
GPSR
AOMDV
EPOR
Fig. 4 Path length for
communication hole
0
0.2
0.4
0.6
0.8
1
1.2
1.4
5 10 15 20 25 30
EPOR
AOMDV
GPSR
Fig. 5 Packet forwarding
times per hop for
communication hole
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9. 4 Conclusion and Future Work
In MANET, we face the problems of frequent changes in network topology that
leads to break the link would either lose the packets. Thus a novel routing protocol
EPOR which takes the advantage of geographic routing and broadcast nature of
wireless medium and ensures the better performance in case of link break. Through
simulation, EPOR confirm the effectiveness and efficiency under high PDR.
0.8
0.85
0.9
0.95
1
1.05
0
50
100
150
200
250
300
350
400
450
500
EPOR
GPSR
AOMDV
Fig. 6 Packet forwarding
times per packet (FTP) for
communication hole
0
0.5
1
1.5
2
2.5
3
0
50
100
150
200
250
300
350
400
450
500
EPOR
GPSR
AOMDV
Fig. 7 Packet delivery ratio
for multi fold
0.8
0.85
0.9
0.95
1
1.05
0
50
100
150
200
250
300
350
400
450
500
EPOR
GPSR
AOMDV
Fig. 8 CDF for single flow
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10. By involving the forwarding candidates in EPOR, the property of backup is useful
in the case of broken route and it will recover in timely manner. An overhead also
addressed by opportunistic routing. This method can combined with a new proposal
of multiple sources with a single destination in a parallel processing method [10],
which will make the PDR to be increase in an energy efficient way by combined
with load balancing.
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