Abstract: In the last couple of years, the use of wireless networks has become more and more popular. A
MANET is a collection of self-organizing mobile nodes which is infrastructure less, autonomous, and standalone
networks. Each node in a MANET is free to move independently in any direction and will therefore change its
links to other devices frequently. Each must forward traffic unrelated to its own use and therefore be a router.
Simulation result has been obtained by a performance comparison of three routing protocols i.e. Ad hoc Ondemand
Distance Vector (AODV), Dynamic Source Routing (DSR), Location Aided Routing (LAR1) against
Simulation time. The Result is obtained using QualNet simulator version 6.1. Different protocols are evaluated
based on measures such as Average End to End delay (s), Average Jitter(s), and Packet delivery ratio.
Keywords: MANET, AODV, DSR, LAR1, QualNet 6.1
Analysis of FSR, LANMAR and DYMO under MANETidescitation
A movable ad hoc system (MANET) is a self-configuring communications set of
connections of mobile procedure associated by wireless. Each mechanism in a MANET is
free to move independently in some way, and will therefore modify its relations to other
devices frequently [2]. The primary purpose of any ad-hoc network routing protocol is to
meet the challenges of the dynamically changing topology and establish an efficient route
connecting every two nodes. In this paper three protocols FSR, LANMAR and DYMO are
compared by using random waypoint mobility in few nodes with varying packet sizes in
CBR traffic. The parameters or metrics are used to assess the performance of protocols with
and without Black Hole attack, that are data Packet Delivery ratio and Average Jitter with
varying data traffic CBR (Constant Bit Ratio) using Qual Net 5.0.2 simulator.
Performance Evaluation and Comparison of Ad-Hoc Source Routing ProtocolsNarendra Singh Yadav
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 by varying speed of nodes, traffic sources and mobility.
Mobility is one of the basic features that define an ad hoc network, an asset that leaves the field free for the
nodes to move. The most important aspect of this kind of network turns into a great disadvantage when it
comes to commercial applications, take as an example: the automotive networks that allow communication
between a groups of vehicles. The ad hoc on-demand distance vector (AODV) routing protocol, designed
for mobile ad hoc networks, has two main functions. First, it enables route establishment between a source
and a destination node by initiating a route discovery process. Second, it maintains the active routes, which
means finding alternative routes in a case of a link failure and deleting routes when they are no longer
desired. In a highly mobile network those are demanding tasks to be performed efficiently and accurately.
In this paper, we focused in the first point to enhance the local decision of each node in the network by the
quantification of the mobility of their neighbours. Quantification is made around RSSI algorithm a well
known distance estimation method.
Analysis of FSR, LANMAR and DYMO under MANETidescitation
A movable ad hoc system (MANET) is a self-configuring communications set of
connections of mobile procedure associated by wireless. Each mechanism in a MANET is
free to move independently in some way, and will therefore modify its relations to other
devices frequently [2]. The primary purpose of any ad-hoc network routing protocol is to
meet the challenges of the dynamically changing topology and establish an efficient route
connecting every two nodes. In this paper three protocols FSR, LANMAR and DYMO are
compared by using random waypoint mobility in few nodes with varying packet sizes in
CBR traffic. The parameters or metrics are used to assess the performance of protocols with
and without Black Hole attack, that are data Packet Delivery ratio and Average Jitter with
varying data traffic CBR (Constant Bit Ratio) using Qual Net 5.0.2 simulator.
Performance Evaluation and Comparison of Ad-Hoc Source Routing ProtocolsNarendra Singh Yadav
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 by varying speed of nodes, traffic sources and mobility.
Mobility is one of the basic features that define an ad hoc network, an asset that leaves the field free for the
nodes to move. The most important aspect of this kind of network turns into a great disadvantage when it
comes to commercial applications, take as an example: the automotive networks that allow communication
between a groups of vehicles. The ad hoc on-demand distance vector (AODV) routing protocol, designed
for mobile ad hoc networks, has two main functions. First, it enables route establishment between a source
and a destination node by initiating a route discovery process. Second, it maintains the active routes, which
means finding alternative routes in a case of a link failure and deleting routes when they are no longer
desired. In a highly mobile network those are demanding tasks to be performed efficiently and accurately.
In this paper, we focused in the first point to enhance the local decision of each node in the network by the
quantification of the mobility of their neighbours. Quantification is made around RSSI algorithm a well
known distance estimation method.
EVALUATION OF PROACTIVE, REACTIVE AND HYBRID AD HOC ROUTING PROTOCOL FOR IEEE...cscpconf
In VANET high speed is the real characteristics which leads to frequent breakdown,
interference etc. Therefore Performance of adhoc routing protocols is helpful to improve the
Quality of Service (QOS). In this paper we studied various adhoc routing protocols, Reactive,
Proactive & Hybrid, taking in to consideration parameters like speed, altitude, mobility etc in
real VANET scenario. The AODV and DYMO (Reactive), OLSR (Proactive) and ZRP (hybrid)
protocols are compared for IEEE 802.11(MAC) and IEEE 802.11(DCF) standard using
Qualnet as a Simulation tool. Since IEEE 802.11, covers both physical and data link layer.
Hence performance of the protocols in these layers helps to make a right selection of Protocol
for high speed mobility. Varying parameters of VANET shows that in the real traffic scenarios
proactive protocol performs more efficiently for IEEE 802.11 (MAC) and IEEE 802.11(DCF)
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Performance comparison of routing protocols in mobile ad hoc networksijujournal
Routing protocols have an important role in any Mobile Ad Hoc Network (MANET). Researchers have elaborated several routing protocols that possess different performance levels. In this paper we give a performance evaluation of AODV, DSR, DSDV, OLSR and DYMO routing protocols in Mobile Ad Hoc
Networks (MANETS) to determine the best in different scenarios. We analyse these MANET routing protocols by using NS-2 simulator. We specify how the Number of Nodes parameter influences their performance. In this study, performance is calculated in terms of Packet Delivery Ratio, Average End to End Delay, Normalised Routing Load and Average Throughput.
P ERFORMANCE C OMPARISON OF R OUTING P ROTOCOLS IN M OBILE A D H OC N E...ijujournal
Routing protocols have
an important
role in any
Mobile Ad Hoc Network
(MANET).
Researchers
have
elaborated several routing protocols that possess different performance levels
. In this
p
aper
we
give a
performance evaluation of
AODV,
DSR,
DSDV
, OLSR and DYMO
routing protocol
s
in
Mobile Ad Hoc
Networks
(MANETS)
to
determine
the best
in different scenarios
. We
analyse
these
MANET
routing
protocols by
using
NS
-
2 simulator
. We specify how
the
Number of No
d
es
parameter influences
their
performance. In this study
,
performance is
calculated
in terms
of Packet Delivery Ratio,
Average
End to
End Delay, Normalised Routing Load and Average Throughput
Enhanced aodv route discovery and route establishment for qos provision for r...IJCNCJournal
MANET is a temporary connection of mobile nodes via wireless links having no centralized base station.
We developed a protocol with an enhanced route discovery mechanism that avoids the pre-transmission
delay. When a source node wants to communicate with another node, it broadcast RREQ. EAODV give
priority to the source node of real time transmission. When RREQ packet send to neighbor node, for real
time transmission it accept route request on priority basis and the drop ratio of packets decreased, then
throughput increases by receiving more packets at destination and delivery ratio also increased through
these QOS improved.
Survey of Modified Routing Protocols for Mobile Ad-hoc Networkijsrd.com
In last few years extensive research work has been done in the field of routing protocols for Ad-hoc Network. Various routing protocols have been evaluated in different network conditions using different performance metrics. A lot of research has been done how to modify standard routing protocol in ad-hoc network to improve its performance. The hop count is not only metric that gives efficient routing path. There are various modified protocols which make the use of other parameters along with hop count to select the best routing path to the destination. In standard Ad-hoc On-demand Distance Vector (AODV) routing protocol only hop count is used for selecting the routing path. In this paper we have studied variants of AODV protocols with modified routing metric.
A Performance Comparison of Routing Protocols for Ad Hoc NetworksIJERA Editor
Mobile Ad hoc Network (MANET) is a collection of mobile nodes in which the wireless links are frequently broken down due to mobility and dynamic infrastructure. Routing is a significant issue and challenge in ad hoc networks. Many routing protocols have been proposed like OLSR, AODV so far to improve the routing performance and reliability. In this paper, we describe the Optimized Link State Routing Protocol (OLSR) and the Ad hoc On-Demand Distance Vector (AODV). We evaluate their performance through exhaustive simulations using the Network Simulator 2 (ns2) by varying conditions (node mobility, network density).
Network Lifetime Analysis of Routing Protocols of Short Network in QualnetIOSR Journals
A Mobile Ad-Hoc Network (MANET) is a collection of wireless mobile nodes that communicates with
each other without using any existing infrastructure, access point or centralized administration. Mobile ad-hoc
network have the attributes such as wireless connection, continuously changing topology, distributed operation
and ease of deployment. In this paper we have compared the energy consumption of reactive, proactive &
hybrid routing protocol AODV,DSR,RIP & ZRP by using different mobility model. We have analyzed the
Network lifetime of protocols by varying pay load, mobility, pause time and type of traffic (CBR). A detailed
simulation has been carried out in qualnet. The metrics used for performance analysis are energy consumed &
battery consumption. It has been observed that RIP has better network lifetime than other
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
ENERGY AND PERFORMANCE EVALUATION OF REACTIVE, PROACTIVE, AND HYBRID ROUTING ...ijwmn
This paper evaluates the energy consumption of well-known routing protocols, along with other metrics
such as throughput, packet delivery ratio (PDR), and delay in different scenarios. We consider two other
metrics in order to capture the efficiency of the energy consumption: e-throughput which is the ratio
between the consumed energy and the throughput; and the e-PDR which is the ratio between the
consumed energy and the PDR. We compare four routing protocols: AODV, OLSR, and HWMP in
Reactive and Proactive modes. The number of nodes is varying between 25 and 81 nodes, with different
mobility models. Simulations are conducted using NS3 and the parameters of a real network interface
card. From the results, AODV presents the lowest energy consumption and a better e-Throughput. OLSR
provides a better e-PDR in mobile scenarios. With a smaller e-PDR and e-Throughput, the proactive
mode of HWMP is more energy efficient than the reactive mode.
COMPARATIVE ANALYSIS OF ROUTING PROTOCOLS IN MOBILE AD HOC NETWORKSijcax
A Mobile Ad Hoc Network (MANET) is a collection of mobile nodes that want to communicate without any pre-determined infrastructure and fixed organization of available links. Each node in MANET operates as a router, forwarding information packets for other mobile nodes. There are many routing protocols that possess different performance levels in different scenarios. The main task is to evaluate the existing routing
protocols and finding by comparing them the best one. In this article we compare AODV, DSR, DSDV, OLSR and DYMO routing protocols in mobile ad hoc networks (MANETs) to specify the best operational conditions for each MANETs protocol. We study these five MANETs routing protocols by different simulations in NS-2 simulator. We describe that pause time parameter affect their performance. This performance analysis is measured in terms of Packet Delivery Ratio, Average End-to-End Delay, Normalized Routing Load and Average Throughput.
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.t
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.
“An analytical study on medal tally of top ten countries in 2012 Olympic Game...IOSR Journals
The origin of the ancient Olympic Games is lost the midst of pre-history, but for many centuries they
were only a festival of the Greek people. The Games were first held in honour of the Greek God, Zeus in 776
BC in the plain of kingdom of Elis, nestled in lush valley between the Alpheus River and Mount Kronion, 15
km from the Ionian Sea. The Olympiad celebrated that year was considered as the first and was used to date
subsequent historic events.
Optimization of Complete Monopole Antennato Exhibit Wideband Capabilities.IOSR Journals
Antennas used for early portable wireless handheld devices were the so-called whip antennas. The
quarter-wavelength whip antenna was very popular, mostly because it is simple and convenient. It has an Omnidirectional
pattern in the plane of the earth when held upright and a gain satisfying the device’s specifications.
New antenna designs have appeared on radios with lower profile than the whip antenna and without
significantly reducing performance. These include the quarter-wavelength helical antenna and the “stubby”
helical antenna, which is the shortest antenna available. In recent years, the demand for compact handheld
communication devices has grown significantly. Devices smaller than palm size have appeared in the market.
Antenna size is a major factor that limits device miniaturization. In the past few years, new designs based on the
Planar Inverted-F Antenna (PIFA) and Microstrip Antennas (MSA) have been popular for handheld wireless
devices because these antennas have a low profile geometry instead of protruding as most antennas do on
handheld radios. Conventional PIFAs and MSAs are compact, with a length that is approximately a quarter to a
half of the wavelength. These antennas can be further optimized by adding new parameters in the design, such
as strategically shaping the conductive plate, or judiciously locating loads.
Efficient Sub Area Tree Routing Protocol (Estr) For Collision Avoidance in Mo...IOSR Journals
Abstract: Efficient Sub area tree routing, is named after its performance, where the whole network is divided into many subareas, such that they form sub area trees. The root nodes are identified by manual configuration or auto-discovery process. Initially a root node establishes sub area trees and each node either forms a sub area tree or become a interconnect node. ESTR is a hierarchical routing protocol and does not maintain the routing information in every node consistently.It exhibits both the behaviour of proactive and on-demand routing protocols. The simulation results shows that the throughput value of the protocol is considerably found to be maximum compared to AODV protocol which leads to the avoidance of collision, reduces the delay, energy consumption and the data transmission time. Keywords: ESTR, hierarchical routing protocol, throughput, collision avoidance.
EVALUATION OF PROACTIVE, REACTIVE AND HYBRID AD HOC ROUTING PROTOCOL FOR IEEE...cscpconf
In VANET high speed is the real characteristics which leads to frequent breakdown,
interference etc. Therefore Performance of adhoc routing protocols is helpful to improve the
Quality of Service (QOS). In this paper we studied various adhoc routing protocols, Reactive,
Proactive & Hybrid, taking in to consideration parameters like speed, altitude, mobility etc in
real VANET scenario. The AODV and DYMO (Reactive), OLSR (Proactive) and ZRP (hybrid)
protocols are compared for IEEE 802.11(MAC) and IEEE 802.11(DCF) standard using
Qualnet as a Simulation tool. Since IEEE 802.11, covers both physical and data link layer.
Hence performance of the protocols in these layers helps to make a right selection of Protocol
for high speed mobility. Varying parameters of VANET shows that in the real traffic scenarios
proactive protocol performs more efficiently for IEEE 802.11 (MAC) and IEEE 802.11(DCF)
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Performance comparison of routing protocols in mobile ad hoc networksijujournal
Routing protocols have an important role in any Mobile Ad Hoc Network (MANET). Researchers have elaborated several routing protocols that possess different performance levels. In this paper we give a performance evaluation of AODV, DSR, DSDV, OLSR and DYMO routing protocols in Mobile Ad Hoc
Networks (MANETS) to determine the best in different scenarios. We analyse these MANET routing protocols by using NS-2 simulator. We specify how the Number of Nodes parameter influences their performance. In this study, performance is calculated in terms of Packet Delivery Ratio, Average End to End Delay, Normalised Routing Load and Average Throughput.
P ERFORMANCE C OMPARISON OF R OUTING P ROTOCOLS IN M OBILE A D H OC N E...ijujournal
Routing protocols have
an important
role in any
Mobile Ad Hoc Network
(MANET).
Researchers
have
elaborated several routing protocols that possess different performance levels
. In this
p
aper
we
give a
performance evaluation of
AODV,
DSR,
DSDV
, OLSR and DYMO
routing protocol
s
in
Mobile Ad Hoc
Networks
(MANETS)
to
determine
the best
in different scenarios
. We
analyse
these
MANET
routing
protocols by
using
NS
-
2 simulator
. We specify how
the
Number of No
d
es
parameter influences
their
performance. In this study
,
performance is
calculated
in terms
of Packet Delivery Ratio,
Average
End to
End Delay, Normalised Routing Load and Average Throughput
Enhanced aodv route discovery and route establishment for qos provision for r...IJCNCJournal
MANET is a temporary connection of mobile nodes via wireless links having no centralized base station.
We developed a protocol with an enhanced route discovery mechanism that avoids the pre-transmission
delay. When a source node wants to communicate with another node, it broadcast RREQ. EAODV give
priority to the source node of real time transmission. When RREQ packet send to neighbor node, for real
time transmission it accept route request on priority basis and the drop ratio of packets decreased, then
throughput increases by receiving more packets at destination and delivery ratio also increased through
these QOS improved.
Survey of Modified Routing Protocols for Mobile Ad-hoc Networkijsrd.com
In last few years extensive research work has been done in the field of routing protocols for Ad-hoc Network. Various routing protocols have been evaluated in different network conditions using different performance metrics. A lot of research has been done how to modify standard routing protocol in ad-hoc network to improve its performance. The hop count is not only metric that gives efficient routing path. There are various modified protocols which make the use of other parameters along with hop count to select the best routing path to the destination. In standard Ad-hoc On-demand Distance Vector (AODV) routing protocol only hop count is used for selecting the routing path. In this paper we have studied variants of AODV protocols with modified routing metric.
A Performance Comparison of Routing Protocols for Ad Hoc NetworksIJERA Editor
Mobile Ad hoc Network (MANET) is a collection of mobile nodes in which the wireless links are frequently broken down due to mobility and dynamic infrastructure. Routing is a significant issue and challenge in ad hoc networks. Many routing protocols have been proposed like OLSR, AODV so far to improve the routing performance and reliability. In this paper, we describe the Optimized Link State Routing Protocol (OLSR) and the Ad hoc On-Demand Distance Vector (AODV). We evaluate their performance through exhaustive simulations using the Network Simulator 2 (ns2) by varying conditions (node mobility, network density).
Network Lifetime Analysis of Routing Protocols of Short Network in QualnetIOSR Journals
A Mobile Ad-Hoc Network (MANET) is a collection of wireless mobile nodes that communicates with
each other without using any existing infrastructure, access point or centralized administration. Mobile ad-hoc
network have the attributes such as wireless connection, continuously changing topology, distributed operation
and ease of deployment. In this paper we have compared the energy consumption of reactive, proactive &
hybrid routing protocol AODV,DSR,RIP & ZRP by using different mobility model. We have analyzed the
Network lifetime of protocols by varying pay load, mobility, pause time and type of traffic (CBR). A detailed
simulation has been carried out in qualnet. The metrics used for performance analysis are energy consumed &
battery consumption. It has been observed that RIP has better network lifetime than other
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
ENERGY AND PERFORMANCE EVALUATION OF REACTIVE, PROACTIVE, AND HYBRID ROUTING ...ijwmn
This paper evaluates the energy consumption of well-known routing protocols, along with other metrics
such as throughput, packet delivery ratio (PDR), and delay in different scenarios. We consider two other
metrics in order to capture the efficiency of the energy consumption: e-throughput which is the ratio
between the consumed energy and the throughput; and the e-PDR which is the ratio between the
consumed energy and the PDR. We compare four routing protocols: AODV, OLSR, and HWMP in
Reactive and Proactive modes. The number of nodes is varying between 25 and 81 nodes, with different
mobility models. Simulations are conducted using NS3 and the parameters of a real network interface
card. From the results, AODV presents the lowest energy consumption and a better e-Throughput. OLSR
provides a better e-PDR in mobile scenarios. With a smaller e-PDR and e-Throughput, the proactive
mode of HWMP is more energy efficient than the reactive mode.
COMPARATIVE ANALYSIS OF ROUTING PROTOCOLS IN MOBILE AD HOC NETWORKSijcax
A Mobile Ad Hoc Network (MANET) is a collection of mobile nodes that want to communicate without any pre-determined infrastructure and fixed organization of available links. Each node in MANET operates as a router, forwarding information packets for other mobile nodes. There are many routing protocols that possess different performance levels in different scenarios. The main task is to evaluate the existing routing
protocols and finding by comparing them the best one. In this article we compare AODV, DSR, DSDV, OLSR and DYMO routing protocols in mobile ad hoc networks (MANETs) to specify the best operational conditions for each MANETs protocol. We study these five MANETs routing protocols by different simulations in NS-2 simulator. We describe that pause time parameter affect their performance. This performance analysis is measured in terms of Packet Delivery Ratio, Average End-to-End Delay, Normalized Routing Load and Average Throughput.
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.t
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.
“An analytical study on medal tally of top ten countries in 2012 Olympic Game...IOSR Journals
The origin of the ancient Olympic Games is lost the midst of pre-history, but for many centuries they
were only a festival of the Greek people. The Games were first held in honour of the Greek God, Zeus in 776
BC in the plain of kingdom of Elis, nestled in lush valley between the Alpheus River and Mount Kronion, 15
km from the Ionian Sea. The Olympiad celebrated that year was considered as the first and was used to date
subsequent historic events.
Optimization of Complete Monopole Antennato Exhibit Wideband Capabilities.IOSR Journals
Antennas used for early portable wireless handheld devices were the so-called whip antennas. The
quarter-wavelength whip antenna was very popular, mostly because it is simple and convenient. It has an Omnidirectional
pattern in the plane of the earth when held upright and a gain satisfying the device’s specifications.
New antenna designs have appeared on radios with lower profile than the whip antenna and without
significantly reducing performance. These include the quarter-wavelength helical antenna and the “stubby”
helical antenna, which is the shortest antenna available. In recent years, the demand for compact handheld
communication devices has grown significantly. Devices smaller than palm size have appeared in the market.
Antenna size is a major factor that limits device miniaturization. In the past few years, new designs based on the
Planar Inverted-F Antenna (PIFA) and Microstrip Antennas (MSA) have been popular for handheld wireless
devices because these antennas have a low profile geometry instead of protruding as most antennas do on
handheld radios. Conventional PIFAs and MSAs are compact, with a length that is approximately a quarter to a
half of the wavelength. These antennas can be further optimized by adding new parameters in the design, such
as strategically shaping the conductive plate, or judiciously locating loads.
Efficient Sub Area Tree Routing Protocol (Estr) For Collision Avoidance in Mo...IOSR Journals
Abstract: Efficient Sub area tree routing, is named after its performance, where the whole network is divided into many subareas, such that they form sub area trees. The root nodes are identified by manual configuration or auto-discovery process. Initially a root node establishes sub area trees and each node either forms a sub area tree or become a interconnect node. ESTR is a hierarchical routing protocol and does not maintain the routing information in every node consistently.It exhibits both the behaviour of proactive and on-demand routing protocols. The simulation results shows that the throughput value of the protocol is considerably found to be maximum compared to AODV protocol which leads to the avoidance of collision, reduces the delay, energy consumption and the data transmission time. Keywords: ESTR, hierarchical routing protocol, throughput, collision avoidance.
An Efficient Performance of Mimo - Ofdm Based Cognitieve Radio System for Arr...IOSR Journals
Abstract: The wireless channel is central within this context, thus estimating the channel is the key to make CR operational, taking in consideration that the transmission-reception technology is available. In this thesis, we design a MIMO system using OFDM modulation technology to transmit and receive two signals over the mobile wireless channel. First formulate the pilot design as a new optimization problem. We use MIMO concept to enhance system capacity and robustness of the wireless transmission. In Multi-Input Multi-Output (MIMO) based cognitive radio (CR) systems, with the increasing demand for data rate and reliability in Wireless communicationsand devices, several issues become very important like bandwidth efficiency, quality of service and radio coverage. In this new scheme, adaptive arrays are group-selected in the spatial domain. Simulation shows that the proposed system can get significant performance improvements over the conventional array based OFDM systems over frequency-selective multipath fading channels with cognitive radio (CR) system. Keywords: Cognitive radios, MIMO, OFDM, and Joint transmit and receive group selected arrays.
Effect of glycine as an impurity on the properties of Epsomite single crystalsIOSR Journals
Epsomite (MgSO4.7H2O) is a hydrogen bonded crystal having a wide range of applications in various fields. Pure and glycine added Epsomite (a total of six) single crystals have been grown and characterized in order to investigate the effect of glycine as an impurity on the properties of Epsomite crystals.The densities and lattice parameters observed indicate that the impurity molecules have entered into the crystal matrix. The grown crystals exhibit good optical transparency in the wavelength range 210-1100 nm. Second harmonic generation measurements indicate that they are nonlinear optically active. Results obtained through microhardness measurements follow the normal indentation size effect. Electrical (AC and DC) measurements indicate that all the six crystals grown in the present study exhibit a normal dielectric behavior and the electrical conduction is understood to be due to the protonic movement. Moreover, glycine addition is found to reduce εr value significantly indicating the possibility of Epsomite crystal becoming a low -εr value dielectric material.
A Novel Interface to a Web Crawler using VB.NET TechnologyIOSR Journals
Abstract : The number of web pages is increasing into millions and trillions around the world. To make
searching much easier for users, web search engines came into existence. Web Search engines are used to find
specific information on the World Wide Web. Without search engines, it would be almost impossible to locate
anything on the Web unless or until a specific URL address is known. This information is provided to search by
a web crawler which is a computer program or software. Web crawler is an essential component of search
engines, data mining and other Internet applications. Scheduling Web pages to be downloaded is an important
aspect of crawling. Previous research on Web crawl focused on optimizing either crawl speed or quality of the
Web pages downloaded. While both metrics are important, scheduling using one of them alone is insufficient
and can bias or hurt overall crawl process. This paper is all about design a new Web Crawler using VB.NET
Technology.
Keywords: Web Crawler, Visual Basic Technology, Crawler Interface, Uniform Resource Locator.
Exploring the Effect of Web Based Communications on Organizations Service Qua...IOSR Journals
The paper aims to study the effect of web based communications on the service quality of organizations. Web based communications is used for a variety of reasons.The quality of a Web-based customer support system involves the information it supplies, the service it provides, andcharacteristics of the system itself; its effectiveness is reflected by the satisfaction of its users. This paper presents the results of astudy of quality and effectiveness in Web-based customer support systems. Data from a survey of 726 Internet users were used to test theoretically expected relationships. The results of this study indicate that information and system quality determine effectiveness while service quality has no impact. Practical implications for managers and designers are offered.The Internet is the latest in a long succession of communication technologies. The goal of this work is to draw lessons from the evolution of all these services. Little attention is paid to technology as such, since that has changed radically many times. Instead, the stress is on the steady growth in volume of communication, the evolution in the type of traffic sent, the qualitative change this growth produces in how people treat communication, and the evolution of pricing. The focus is on the user, and in particular on how quality and price differentiation have been used by service providers to influenceconsumer behavior, and how consumers have reacted.
Design of Adjustable Reconfigurable Wireless Single Core CORDIC based Rake Re...IOSR Journals
In wireless communication system transmitted signals are subjected to multiple reflections,
diffractions and attenuation caused by obstacles such as buildings and hills, etc. At the receiver end, multiple
copies of the transmitted signal are received that arrive at clearly distinguishable time instants and are faded by
signal cancellation. Rake receiver is a technique to combine these so called multi-paths [2] by utilizing multiple
correlation receivers allocated to those delay positions on which the significant energy arrives which achieves a
significant improvement in the SNR of the output signal. This paper shows how the rake, including dispreading
and descrambling could be replaced by a receiver that can be implemented on a CORDIC based hardware
architecture. The performance in conjunction with the computational requirements of the receiver is widely
adjustable which is significantly better than that of the conventional rake receiver
There is increased use of nuclear energy after the Second World War which results in increase in artificial radioactivity on our planet. The objective of this article is to show the estimated amount of artificial radioactivity on earth surface and its effect by comparing it with the radioactive decay which took place in Hiroshima bombing by ‘little boy’. There is estimated amount of 100 trillion curie of radioactivity on earth surface for human use. This man made radioactivity on earth surface has capacity to change temperature of the earth by 0.97oC if heat is evenly distributed and unfortunately Hiroshima bombing did not stop but continued at rate of 39 ‘little boy’ bombing of the earth per second. Every second 39 atomic bombs of ‘little boy’ size are dropped. One can see the large amount of bombing taking place on the earth by artificial radioactivity and the bombing should be stopped and further analysis of artificial radioactivity should also be done
Automatic Controlling Of Train Using Wireless Protocol Zigbee IOSR Journals
In INDIA railways is one of the important means of transport. Driver of the train has to look out to
get the status of the signal, if he fails to see the signal major mishaps could take place. There are different
systems in use today including AWS (auxilliary warning system), ACD (automatic collision detection). AWS
system is in use by western railway while ACD is used by Konkan railway.AWS system has a drawback of theft
of trackside equipment while ACD system is based on GPS system where satellite is US owned. Proposed system
focusses on automation of train controlling to avoid accidents. Designed system involves transfer of the status of
signal directly to the engine which will control speed of the train as per the status of the signal. System has been
designed to provide safe travelling especially during bad weather. System is based on wireless protocol
‘Zigbee’. Low power consumption, low latency time of 30 ms and excellent security features as Zigbee uses 128-
AES, use of DSSS modulation technique in Zigbee makes this system reliable and safe. System is operating
within a range of 120m
Role of Virtual Machine Live Migration in Cloud Load BalancingIOSR Journals
Abstract: Cloud computing has touched almost every field of the life. Hence number of cloud application
consumers is increasing every day and so as the number of application request to the cloud provider. This leads
increment of workload in many of the cloud nodes. The motive to use load balancing concepts in cloud
environment is to efficiently utilize available resources keeping in mind that no any single system is heavily
loaded or not a single system is idle during the active phase of the request completion. Even though cloud
computing being a software facility most often, how does it actually performs well in heavily loaded
environment at processor level, is discussed in the paper. This paper aims to throw some light on what is cloud
load balancing and what is the role of Virtual machine migration in improving it.
Keywords: Cloud load balancing, Live Migration, Migration, Virtualization, Virtual machine.
EFFECT OF PAUSE TIME AND NODES ON PERFORMANCE OF AODV AND DSR ROUTING PROTOCO...Editor IJMTER
A central challenge in designing of wireless ad hoc networks is the development of dynamic
routing protocols that can efficiently find routes between two communication nodes when nodes are
mobile. To accomplish this, a number of ad hoc routing protocols had been proposed and implemented.
In wireless ad hoc network the selected protocol should find best route which can insure packet delivery
and packet integrity. Performance evolution of the protocols is the key step before selecting a particular
protocol. In this paper, the performance is compared on Ad hoc On-demand Distance Vector (AODV)
and Dynamic Source Routing (DSR) at application layer by varying the pause time and number of nodes
using QualNet 5.0.2 simulator. The average jitter, end-to-end delay, throughput and packet delivery
fraction (PDF) are the four common measures used for the comparison of the performance of above
protocols. The experimental results show that DSR perform better in low load and high pause time but
in case of high load and less pause time AODV outperform DSR.
PERFORMANCE ANALYSIS AND COMPARISON OF IMPROVED DSR WITH DSR, AODV AND DSDV R...ijp2p
Mobile Ad-hoc networks are categorized by multi-hop wireless connectivity and numbers of nodes are
connecting each other through wireless network. It includes several routing protocols specifically designed
for ad-hoc routing. The most widely used ad hoc routing protocols are Ad-hoc On Demand Distance Vector
(AODV), Destination Sequence Distance Vector (DSDV), and Dynamic Source Routing (DSR). In this
paper, we present an analysis of DSR protocol and propose our algorithm to improve the performance of
DSR protocol by using small delay applied on last route ACK path when an original route fails in Mobile
Ad Hoc networks. Past researchers the MANET have focused on simulation study by varying network
parameters, such as network size, number of nodes. The simulation results shows that the M-DSR protocol
having some excellent performance Metrics then other protocols. We have taken different performance
parameters over the comparison of Modified -DSR with other three protocols in mobility as well as Nonmobility scenario up to 300 nodes in MANETs using NS2 simulator. To achieve this goal DSR is modified
by using modified algorithm technique in order to load balancing, to avoid congestion and lower packet
delivery.
ENHANCING STUDENTS’ LEARNING AND SATISFACTION THROUGH THE USE OF SOCIAL MEDIAIJITE
Communication in and out the classroom is an essential component for education. As the technology
emerges, there is a need to adopt to the new technologies to enhance students’ learning experience. Social
media technologies provide informal communication methods that promote student engagement and
satisfaction by removing communication barriers. In this paper, we report our experience in using different
social media technologies to enhance students’ learning experience and satisfaction with the course. We
perform our experiment in software project management course and conduct a survey to assess the
students’ perspective towards using these different social media technologies in enhancing their learning
and satisfaction. Results show that students are satisfied and feel that their learning experience has
improved when using social media for class communication.
PERFORMANCE ANALYSIS AND COMPARISON OF IMPROVED DSR WITH DSR, AODV AND DSDV R...ijp2p
Mobile Ad-hoc networks are categorized by multi-hop wireless connectivity and numbers of nodes are connecting each other through wireless network. It includes several routing protocols specifically designed for ad-hoc routing. The most widely used ad hoc routing protocols are Ad-hoc On Demand Distance Vector (AODV), Destination Sequence Distance Vector (DSDV), and Dynamic Source Routing (DSR). In this paper, we present an analysis of DSR protocol and propose our algorithm to improve the performance of DSR protocol by using small delay applied on last route ACK path when an original route fails in Mobile Ad Hoc networks. Past researchers the MANET have focused on simulation study by varying network parameters, such as network size, number of nodes. The simulation results shows that the M-DSR protocol
having some excellent performance Metrics then other protocols. We have taken different performance parameters over the comparison of Modified -DSR with other three protocols in mobility as well as Nonmobility scenario up to 300 nodes in MANETs using NS2 simulator. To achieve this goal DSR is modified by using modified algorithm technique in order to load balancing, to avoid congestion and lower packet
delivery.
Our area of interest for the paper is the improvement of performance of DSR routing protocol by
changing in algorithm and this Improved DSR protocol should compare with remaining protocols
taken in this research paper.
2. In this paper we made changesin traditional DSR protocol and generation of new improved DSR the
different performance parameters and compare with AODV/DSR/DSDV protocols in mobility and
non- mobility scenarios nodes up to 300.
3. We can plot the graphs throughput, End to end Delay, Packet delivery Ratio, Dropping Ratio, and
average energy consumption on Mobility and Non-Mobility scenario by using Network Simulator
version 2.34 for Modified DSR protocols. M-DSR, DSDV perform well when Mobility is low.
PERFORMANCE ANALYSIS AND COMPARISON OF IMPROVED DSR WITH DSR, AODV AND DSDV R...ijp2p
Mobile Ad-hoc networks are categorized by multi-hop wireless connectivity and numbers of nodes are
connecting each other through wireless network. It includes several routing protocols specifically designed
for ad-hoc routing. The most widely used ad hoc routing protocols are Ad-hoc On Demand Distance Vector
(AODV), Destination Sequence Distance Vector (DSDV), and Dynamic Source Routing (DSR). In this
paper, we present an analysis of DSR protocol and propose our algorithm to improve the performance of
DSR protocol by using small delay applied on last route ACK path when an original route fails in Mobile
Ad Hoc networks. Past researchers the MANET have focused on simulation study by varying network
parameters, such as network size, number of nodes. The simulation results shows that the M-DSR protocol
having some excellent performance Metrics then other protocols. We have taken different performance
parameters over the comparison of Modified -DSR with other three protocols in mobility as well as Nonmobility scenario up to 300 nodes in MANETs using NS2 simulator. To achieve this goal DSR is modified
by using modified algorithm technique in order to load balancing, to avoid congestion and lower packet
delivery.
COMPARATIVE ANALYSIS OF ROUTING PROTOCOLS IN MOBILE AD HOC NETWORKSijcax
A Mobile Ad Hoc Network (MANET) is a collection of mobile nodes that want to communicate without any
pre-determined infrastructure and fixed organization of available links. Each node in MANET operates as
a router, forwarding information packets for other mobile nodes. There are many routing protocols that
possess different performance levels in different scenarios. The main task is to evaluate the existing routing
protocols and finding by comparing them the best one. In this article we compare AODV, DSR, DSDV,
OLSR and DYMO routing protocols in mobile ad hoc networks (MANETs) to specify the best operational
conditions for each MANETs protocol. We study these five MANETs routing protocols by different
simulations in NS-2 simulator. We describe that pause time parameter affect their performance. This
performance analysis is measured in terms of Packet Delivery Ratio, Average End-to-End Delay,
Normalized Routing Load and Average Throughput.
COMPARATIVE ANALYSIS OF ROUTING PROTOCOLS IN MOBILE AD HOC NETWORKSijcax
A Mobile Ad Hoc Network (MANET) is a collection of mobile nodes that want to communicate without any pre-determined infrastructure and fixed organization of available links. Each node in MANET operates as a router, forwarding information packets for other mobile nodes. There are many routing protocols that
possess different performance levels in different scenarios. The main task is to evaluate the existing routing protocols and finding by comparing them the best one. In this article we compare AODV, DSR, DSDV, OLSR and DYMO routing protocols in mobile ad hoc networks (MANETs) to specify the best operational conditions for each MANETs protocol. We study these five MANETs routing protocols by different
simulations in NS-2 simulator. We describe that pause time parameter affect their performance. This performance analysis is measured in terms of Packet Delivery Ratio, Average End-to-End Delay, Normalized Routing Load and Average Throughput.
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.
Performance comparison of mobile ad hoc network routing protocolsIJCNCJournal
Mobile Ad-hoc Network (MANET) is an infrastructure less and decentralized network which need a robust
dynamic routing protocol. Many routing protocols for such networks have been proposed so far to find
optimized routes from source to the destination and prominent among them are Dynamic Source Routing
(DSR), Ad-hoc On Demand Distance Vector (AODV), and Destination-Sequenced Distance Vector (DSDV)
routing protocols. The performance comparison of these protocols should be considered as the primary
step towards the invention of a new routing protocol. This paper presents a performance comparison of
proactive and reactive routing protocols DSDV, AODV and DSR based on QoS metrics (packet delivery
ratio, average end-to-end delay, throughput, jitter), normalized routing overhead and normalized MAC
overhead by using the NS-2 simulator. The performance comparison is conducted by varying mobility
speed, number of nodes and data rate. The comparison results show that AODV performs optimally well
not the best among all the studied protocols.
Performance Evaluation AODV, DYMO, OLSR and ZRPAD Hoc Routing Protocol for IE...pijans
In VANET high speed is the real characteristics which leads to frequent breakdown, interference etc.
Therefore Performance of adhoc routing protocols is helpful to improve the Quality of Service (QOS). In
this paper we studied various adhoc routing protocols, Reactive, Proactive & Hybrid, taking in to
consideration parameters like speed, altitude, mobility etc in real VANET scenario. The AODV and DYMO
(Reactive), OLSR (Proactive) and ZRP (hybrid) protocols are compared for IEEE 802.11(MAC) and IEEE
802.11(DCF) standard using Qualnet as a Simulation tool. Since IEEE 802.11, covers both physical and
data link layer. Hence performance of the protocols in these layers helps to make a right selection of
Protocol for high speed mobility. Varying parameters of VANET shows that in the real traffic scenarios
proactive protocol performs more efficiently for IEEE 802.11 (MAC) and IEEE 802.11(DCF).
The Effects of Speed on the Performance of Routing Protocols in Mobile Ad-hoc...Narendra Singh Yadav
Mobile ad hoc network is a collection of mobile nodes communicating through wireless channels without any existing network infrastructure or centralized administration. Because of the limited transmission range of wireless network interfaces, multiple "hops" may be needed to exchange data across the network. Consequently, many routing algorithms have come into existence to satisfy the needs of communications in such networks. Researchers have conducted many simulations comparing the performance of these routing protocols under various conditions and constraints. One question that arises is whether speed of nodes affects the relative performance of routing protocols being studied. This paper addresses the question by simulating two routing protocols AODV and DSDV. Protocols were simulated using the ns-2 and were compared in terms of packet delivery fraction, normalized routing load and average delay, while varying number of nodes, and speed.
Progressive Routing Protocol using Hybrid Analysis for MANETsidescitation
In this paper, we proposed a replacement hybrid multipath routing protocol for
MANET known as Hybrid Multipath Progressive Routing Protocol for MANET (HMPRP),
during this work we improve the performance of accepted MANET routing protocols,
namely, the Ad-hoc On-demand Distance Vector routing protocol and use of their most
popular properties to formulate a replacement Hybrid routing protocol using the received
signal strength. The proposed routing protocol optimizes the information measure usage of
MANETs by reducing the routing overload and overhead. This proposed routing protocol
additionally extends the battery lifetime of the mobile devices by reducing the specified
variety of operations for (i) Route determination (ii) for packet forwarding. Simulation
results are used to draw conclusions regarding the proposed routing algorithm and
compared it with the AODV, OLSR, and ZRP protocol. Experiments carried out based on
this proposed algorithm, shows that better performance are achieved with regard to AODV,
OLSR, and ZRP routing algorithm in terms of packet delivery ratio, throughput, energy
consumed and end-to-end packet delay.
Network Lifetime Analysis of Routing Protocols of Short Network in QualnetIOSR Journals
Abstract: A Mobile Ad-Hoc Network (MANET) is a collection of wireless mobile nodes that communicates with each other without using any existing infrastructure, access point or centralized administration. Mobile ad-hoc network have the attributes such as wireless connection, continuously changing topology, distributed operation and ease of deployment. In this paper we have compared the energy consumption of reactive, proactive & hybrid routing protocol AODV,DSR,RIP & ZRP by using different mobility model. We have analyzed the Network lifetime of protocols by varying pay load, mobility, pause time and type of traffic (CBR). A detailed simulation has been carried out in qualnet. The metrics used for performance analysis are energy consumed & battery consumption. It has been observed that RIP has better network lifetime than other.
A Review of Ad hoc on demand distance vector routing and proposed AR-AODVEditor IJMTER
Mobile Ad-hoc networks are a key in the evolution of wireless networks. In mobile
ad hoc networks, there is no centralized infrastructure to monitor or allocate the resources
used by the mobile nodes. The absence of any central coordinator makes the routing a
complex one compared to cellular networks. The Ad hoc On Demand Distance Vector
(AODV) routing algorithm is a routing protocol designed for ad hoc mobile devices. AODV
uses an on demand approach for finding routes .A class of routing protocols called ondemand protocols has recently found attention because of their low routing overhead. The ondemand protocols depend on query floods to discover routes whenever a new route is needed.
Such floods take up a substantial portion of network bandwidth. The routing in Mobile ad hoc
network is difficult and number of reactive routing protocols like AODV, DSR, and DSDV
has been implemented. In this paper, an attempt has been made to thoroughly study all
AODVs and a new AODV is proposed called AR-AODV
Similar to Performance Comparison of AODV, DSR and LAR1 in Mobile Ad-hoc Network based on Simulation Time (20)
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
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Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
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• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
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• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
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.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
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.
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.
Performance Comparison of AODV, DSR and LAR1 in Mobile Ad-hoc Network based on Simulation Time
1. IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
e-ISSN: 2278-2834,p- ISSN: 2278-8735. Volume 7, Issue 4 (Sep. - Oct. 2013), PP 32-36
www.iosrjournals.org
www.iosrjournals.org 32 | Page
Performance Comparison of AODV, DSR and LAR1 in Mobile
Ad-hoc Network based on Simulation Time
Rajeev Paulus1
, Tanbeer Kaur2
, Reema Garg3
, Ashish Shukla4
1
(Assistant Professor, Department of Electronics and communication, SHIATS, Allahabad, U.P, INDIA)
2 ,3,4
(M.TECH Scholar, Department of Electronics and communication, SHIATS, Deemed to be University,
Allahabad, U.P, INDIA)
Abstract: In the last couple of years, the use of wireless networks has become more and more popular. A
MANET is a collection of self-organizing mobile nodes which is infrastructure less, autonomous, and standalone
networks. Each node in a MANET is free to move independently in any direction and will therefore change its
links to other devices frequently. Each must forward traffic unrelated to its own use and therefore be a router.
Simulation result has been obtained by a performance comparison of three routing protocols i.e. Ad hoc On-
demand Distance Vector (AODV), Dynamic Source Routing (DSR), Location Aided Routing (LAR1) against
Simulation time. The Result is obtained using QualNet simulator version 6.1. Different protocols are evaluated
based on measures such as Average End to End delay (s), Average Jitter(s), and Packet delivery ratio.
Keywords: MANET, AODV, DSR, LAR1, QualNet 6.1
I. Introduction
In recent years, the progress of communication technology has made wireless devices smaller, cheaper
and more efficient. MANET has many applications which range from small static topology to a large scale,
mobile, dynamic topology. There exist three types of mobile wireless networks: infrastructure networks, ad-hoc
networks and hybrid networks which combine infrastructure and ad-hoc aspects. In Ad-hoc network mobile
nodes have the ability to communicate with each other using multi-hop path to route the traffic. Nodes of these
network function as router which route the packet from source to destination [1].The primary challenge in
building a MANET is equipping each device to continuously maintain the information required to properly route
traffic. MANET is used in areas with no communication infrastructure such as emergency searches, rescue
operations, etc. The traditional routing protocols is used for static infrastructure networks is incapable for mobile
ad-hoc network, thus require the use of highly efficient protocols [2].
In MANETs some of protocols used for comparison are: AODV [3] [4], DYMO [5],DSR[6] [12] [14],
ZRP [7],FSR [1], LAR1 [16] [17] etc. The main focus is to evaluate the performance of three popular reactive
routing protocols named as AODV, DSR, LAR1. This paper compares the performance of AODV, DSR, LAR1
under different network conditions. Brief description of related work is presented in section 2. Overview of
routing protocols is discussed in section 3. In section 4, simulation models and parameter metrics are explained.
In section 5, information about results and graphs are discussed. Finally, conclusion is presented in section 6.
Fig. 1(a) an infrastructure network with two base stations. (b) A mobile ad-hoc network
II. Related work
Gaurav Sharma, et.al [2], performed experiment for performance of AODV, DSR and DYMO under
the effect of two shadowing model, as Constant and Lognormal. Simulation is done by using Qualnet Simulator
version 5.2. They observed that for constant model, AODV outperforms the other two protocols. DSR showed
the worst performance. But in the case of log-normal, DSR showed better performance than AODV and DYMO.
2. Performance Comparison of AODV, DSR and LAR1 in Mobile Adhoc Network based on Simulation
www.iosrjournals.org 33 | Page
S. R. Raju, et.al [7] proposed an algorithm to provide improved quality of service via hybrid routing protocol
ZRP. They used QualNet version 4.5 and evaluated the performance in ZRP, AODV, and DSR to compare QoS
parameters. Their result showed that ZRP performed poorly throughout all the simulation processes. Their work
did not include DYMO protocol and used fixed mobility speed 1-8 mps and pause time but they use different
network sizes with different nodes.
P. K. Maurya, et.al [10] compared ZRP, AODV, DYMO and DSR using Qualnet 5.2. They analyzed
the throughput, average jitter, average end-to-end and packet delivery ratio in two different phases. In first phase
they analyze the scenario in different pause times and in second phase they varied the maximum speed of nodes
in scenarios. The result shows that ZRP had lower throughput, lower PDR than AODV, DSR and DYMO which
makes itself out of the race. In second phase AODV gave better performance than DYMO and ZRP but lower
than DSR. Overall they could conclude that AODV perform better in all different conditions.
Vinay, et.al [15] analyzed the impact of node mobility and node density on the performance of three routing
protocols (AODV, DSR and DYMO). In case of performance with various maximum node speed AODV has
less average end to end delay, less average jitter, more PDR and high throughput compared to DSR and DYMO
routing protocols under all variations of speed. But DYMO show increases in routing overhead to AODV and
DSR. In case of performance with different node density, AODV has less average end to end delay, less jitter,
high throughput compared to DSR and DYMO routing protocols under all node density variations. But DYMO
show increases in routing overhead to AODV and DSR.
Suresh, et.al [11] analyzed the performance comparison of three routing protocols AODV, DSR & ZRP
for RWP placement models based on constant bit rate (CBR) in Mobile Ad-hoc Network (MANET). Various
performance metrics were computed for all the three protocols. Simulation set up is done using QualNet 5.2
simulator. Simulation result finally reached the conclusion that performance metrics used gives the better
comparative performance at CBR.
Subramanya, et.al [8] compare proactive (OLSR), reactive (AODV, DSR, LAR) and hybrid (ZRP)
routing protocols for stationary and mobile nodes by varying the node density (25, 50, 75, 100, 150, 200 and
250) using Qualnet 5.0.2 network simulator. They considered AODV, DSR, LAR, and OLSR, ZRP routing
protocols for analysis and varied node numbers along with mobility speed. They took parameters such as
throughput, average jitter, average end-to-end delay and packet delivery ratio for the analysis.
III. Overview Of Routing Protocols
3.1 Ad-hoc On Demand distance Vector routing protocol (AODV)
AODV [3] [4], a reactive routing protocol initiate routing activities on an “on demand” basis. The
reactive nature of the protocols is a significant departure from the conventional proactive protocols which
discover routes regardless of the use or need of such routes. The AODV Routing protocol [7] uses an on-
demand approach for discovering the routes on an as needed basis between source and destination. The key
motivation behind the design of an on demand approach is the reduction of the routing load. In AODV,
whenever a source node requires a path to a destination node for which it does not have a route, a route request
(RREQ) packet it broadcasts to all its neighbors in the network. When a neighbor node receives a RREQ, it
examines its local route cache to check whether it is a final destination or not and sends Route reply (RREP)
packet back to the source. In case the link is broken, the nodes are then notified with a Route error (RERR)
packet. Upon receiving the RERR packet, the source node newly initiates the procedure for route discovery [13].
In order to maintain the routes, AODV normally uses link layer feedback and hello packets. AODV allows
mobile nodes to obtain routes quickly for new destinations and does not require nodes to maintain routes to
destination that are not in active communication, thus reducing routing overhead in the routing table.
3.2 Dynamic Source routing protocol (DSR)
The Key distinguishing feature of DSR is the use of source routing so that sender knows the complete
hop by hop route to the destination. It is designed especially for use in multihop ad-hoc networks for mobile
nodes [6].The DSR [12] is composed of the two mechanisms–route discovery and route maintenance which
work together to allow nodes to discover and maintain source routes to arbitrary destination. When a source
node has to send a packet to some destination node, it first searches its route cache to check whether already the
route exists or not. If no route is found in its cache, it will initiate the route discovery by transmitting a route
request as a single local broadcast packet which is received by all nodes within the range of source nodes. Each
node receiving a route request packet searches throughout its cache for a route to its intended destination. If no
route is found in cache, it adds its own address to the routing table of the packet and then forwards it to its
neighbor. If the route is found then such a node replies to the route request packet (RREQ) with a route reply
packet (RREP) that is routed back to the original source. Route is maintained by using a route error (RERR)
3. Performance Comparison of AODV, DSR and LAR1 in Mobile Adhoc Network based on Simulation
www.iosrjournals.org 34 | Page
packet if it encounters a broken link [14].The advantage of this routing is that it supports multiple routes from
source to destination and avoid loop formation.
3.3 Location Aided Routing (LAR1)
The previously described AODV [3] and DSR [6] i.e. on demand methods are usually based on
flooding to obtain a route from source to destination. The main aim of LAR is to reduce the routing overhead so
that it can send the route requests only into a specific area, which contains the destination [16].Location
information is used to do so LAR1, unlike DSR, it also contains the additional requirement of GPS information.
In scheme 1(implemented), the source defines a circular area in which the destination may be located which is
examined by the following information.
1) Average moving speed of the destination.
2) Source should know the destination location.
3) The time instant when the destination was located at that position.
The smallest rectangular area that includes this circle and the source is the request zone is shown in fig4.In
LAR1, source node first calculates the expected zone and then defines a request zone in its request packets
during the route discovery process [17].Source node transmit the request packet to all its neighbor nodes and
only nodes inside the request zone forwards the request packet; otherwise it will discard the packet. When the
request packet reaches its final destination, then the destination node replies with a route reply packet. If no
route reply is received within the timeout period, the source retransmits a route request via pure flooding.
Fig.4 LAR Scheme 1 - Request Zone.
IV. Simulation Setup
Simulation is carried out on QualNet version 6.1[9]. The performance of Routing Protocols AODV, DSR
and LAR1 is evaluated by varying the different simulation time, over an area of 900×900 m2
.Among various
nodes application of Constant Bit Rate is applied. All the nodes in the depicted scenario are given a mobility
using the protocol of Random waypoint mobility model. Simulation parameters are shown in table 1.With the
help of simulation results we have analyzed Average Jitter, Packet delivery ratio, Throughput, and End-to-End
delay for the given protocol. These performance metrics are defined below:
4.1Packet delivery ratio
The ratio of the number of delivered data packet to the destination. This illustrates the level of delivered data to
the destination. The greater value of packet delivery ratio means the better performance of the protocol.
4.2 Throughput
Average rate of successful message delivery over a communication channel. This data may be
delivered over a physical or logical link, or pass through a certain network node. It is usually measured in
bits/sec and sometimes in data packets/sec.
4.3 Average End-to-End delay
It refers to the time taken for a packet to be transmitted across a network from source to destination.
The lower value of end to end delay means the better performance of the protocol.
4.4 Average Jitter
It is used as measure of the variability over time of the packet latency across a network.
4. Performance Comparison of AODV, DSR and LAR1 in Mobile Adhoc Network based on Simulation
www.iosrjournals.org 35 | Page
Table.1 Simulation Parameters
Simulation parameters Value
Size 900x900 m2
Routing Protocols AODV,DSR,LAR1
Simulation Time 60,90,150,210,300sec
Pause Time 10 sec
Mobility Model RWP
Max Speed 30 sec
Packet rate 5 Packet per sec
No. Of Node 120
Channel frequency 2.4 GHz
Path loss model Two Ray
Shadowing Model Constant
V. Results And Discussion
Fig.5 shows that variation of throughput against simulation time, it can be observed that AODV has
maximum value of throughput at all the simulation time as compared to DSR and LAR1.At simulation time of
60 sec DSR has slightly greater throughput than LAR1 but with increasing simulation time its value decreases
and becomes lower than LAR1.
.
Fig.5 Throughput vs. Simulation Time
Fig.6 shows that variation of average jitter against simulation time, it is observed that AODV has the lowest
jitter at all simulation time as compared to DSR and LAR1.Therefore AODV performs well in all times. LAR1
jitter variation is slightly greater than AODV. In DSR, with increase in simulation time, average jitter increases
and at 210 sec its value is maximum but beyond this value, jitter decreases. Hence, DSR performs poorly as its
average jitter is maximum in all simulation times.
Fig.6 Average Jitter vs. Simulation Time
Fig.7 shows the variation of average end to end delay against simulation time and it is observed that AODV has
lowest value of average end-to-end delay with all most constant value. With increasing simulation time, average
jitter of DSR increases and is maximum at 300 sec.
Fig.7 Average end-to-end delay vs. Simulation Time
5. Performance Comparison of AODV, DSR and LAR1 in Mobile Adhoc Network based on Simulation
www.iosrjournals.org 36 | Page
Fig.8 shows the variation of packet delivery ratio against simulation time and it is observed that for AODV
packet delivery ratio is almost constant and is high for all the simulation time as compared to DSR and LAR1.At
60 sec DSR has slightly greater PDR than LAR1 but with increasing time (90,150,210,300 sec), its value
decreases.
Fig.8 Packet delivery Ratio vs. Simulation Time
VI. Conclusion
This paper presents a performance comparison of AODV, DSR, LAR1 routing protocol for mobile
ad-hoc networks with variable simulation time. We measure End to End delay (s), Average Jitter (s),
Throughput and Packet delivery ratio as performance metrics. Our simulation results shows AODV
performance is best under all performance metrics. LAR1 throughput and packet delivery ratio is better than
DSR. DSR shows the worst performance for average jitter and average end-to-end delay with the varying
simulation time. In future, this paper can be enhanced by analyzing the other MANET routing protocols under
real-world scenarios.
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