Wireless Communication

Neha Singh Sisodiya ¹, Sarita Singh Bhadauria ¹

Affiliations
1 Department of Electronics, Madhav Institute of Technology and Science, Gwalior, M.P, IN

Abstract

In this paper the performance of MAC Layer is seen when the number of nodes which are misbehaving increases in the wireless networks. Mobile ad hoc networks depends on the network nodes cooperation in forwarding packets due to the lack of centralized authority. A network node may incline not to cooperate with other nodes in order to save its resources due to selfishness. By analysing all parameters in misbehaving conditions the most appropriate fixed value of them can be determined in order to obtain minimize the misbehaving nodes bad performance and to improve the performance of overall network. Here qualnet 5.2 is used for analysis and simulation of the network.

Keywords

Distributed Coordination Function, Legitimate Nodes, 802.11 MAC Protocol, Selfish Misbehavior.

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Vishnu Kumar Sharma ¹, Sarita Singh Bhadauria ²

Affiliations
1 Department of CSE, Jaypee University of Engineering and Technology, IN
2 Department of Electronics, Madhav Institute of Technology and Science, Gwalior, IN

Abstract

The main aim of power control in mobile adhoc network (MANET) is to maintain network connectivity and avoid network partioning and also to provide power efficient operation. In this paper we propose an agent based power control technique in MANET. The mobile agent from source starts forwarding the data packets through the path which has minimum cost and congestion. The status of every node is collected and finally it is delivered to destination node. In power control technique, the nodes are chosen based on the power level. The nodes with maximum power level are selected as listening nodes (LN) which will always be in active mode and remaining nodes are selected as non-listening nodes (NLN) which will awake in periodic manner. If the node receiving the data packet is not awake, the packet is transmitted through LN towards the destination. By simulation results, we show that the proposed technique provides most efficient congestion and power controls.

Keywords

Mobile Ad Hoc Networks (MANETs), Mobile Agents (MA), Total Congestion Metric (TCM), Enhanced Distributed Channel Access (EDCA), Transmission Opportunity Limit (TXOP).

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Vishnu Kumar Sharma ¹, Sarita Singh Bhadauria ²

Affiliations
1 CSE Deptt. of Jaypee University of Engg and Technology, IN
2 Department of Electronics, MITS, Gwalior (M.P.), IN

Abstract

Mobile ad hoc networks(MANET) signify intricate disseminated systems that consist of wireless mobile nodes that can liberally and energetically self organize into arbitrary and temporary adhoc network topologies, allowing people and devices to effortlessly internet work in areas with no pre-existing communication infrastructure e.g., calamity recovery environments. An ad-hoc network is not a new one, having been around in various forms for over 25 years. conventionally, strategic networks have been the only communication networking purpose that followed the ad-hoc paradigm. Recently the introduction of new technologies such as Bluetooth, IEEE 802.11 and hyperlan are serving enable ultimate viable MANET deployments outside the military domain. These recent revolutions have been generated a transformed and growing interest in the research and development of MANET. To make easy communication within the network a routing protocol is used to discover routes between nodes. The objective of the routing protocol is to have an well-organized route establishment between a pair of nodes, so that messages can be delivered in a well-timed mode. Bandwidth and power constraint are the essential factors to be measured in current wireless network because multi-hop ad-hoc wireless relies on each node in the network to act as a router and packet forwarder. This enslavement spaces bandwidth, power calculation demands on mobile host to be taken into account while choosing the protocol. Routing protocols used in wired network cannot be used for mobile ad-hoc networks because of node mobility. The ad-hoc routing protocols are divided into two classes: table driven and demand based. This paper reviews, Comparative Study and discusses a variety of routing protocol belonging to each category.

Keywords

MANET, Routing Protocol, On-Demand, Active and Reactive Protocols.

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