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A mobile ad hoc network (MANET) is an autonomous network that consists of mobile nodes that communicate with each other over wireless links. In the absence of a fixed infrastructure, nodes have to cooperate in order to provide the necessary network functionality. One of the principal routing protocols used in Ad hoc networks is AODV (Ad hoc on demand Distance Vector) protocol. The security of the...
In this paper an upgraded protocol referred to as Rate Adaptive Sustainable Physical Activity in Neighborhoods (RA-SPAN) protocol is proposed. In this protocol the power saving algorithm of SPAN is integrated with dynamic switching of data rates. Power consumption of nodes is reduced by cross-layer signaling between MAC and Network layers as in the SPAN protocol and dynamically electing the coordinators...
Existing on demand routing protocols for MANET's use shortest path as the routing metric, which leads to overuse of an existing path thereby creating hot spots leading to congestion and packet loss. Hence it is important for a routing protocol to adapt to increasing load conditions by timely estimating the load and avoid such congested nodes during route formation. Estimating the load is difficult...
Jiter is referred as the variability of latency in packets over a period of time. In mobile network, topology changes rapidly which causes a reconfiguration of network. Therefore the latency of transmission also varies. It gives rise to a QOS problem as predicting exact latency is difficult. Hence time bound or real time packets can not be guaranteed highest QOS in MANET. It this paper we propose...
Packet scheduling has been a very popular paradigm to ensure maximum throughput and bounded delay access for packet flows. This work proposes packet scheduling approach to QOS provisioning in multihop wireless networks. Our scheduling mechanism achieves fair and maximum allocation of the shared wireless channel bandwidth for MANET's that consist of General nodes and Backbone nodes. Backbone nodes...
CDMA is most widely used standard for multiuser system in wireless ad hoc network. CDMA standards presents set of protocols for power control, BER control and multiuser detection system in ad hoc network. Therefore behevior of MANET depends upon the modeling of CDMA based MAC layer, which also attributes to the performance of the network. In this paper we present a means of improving the performance...
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