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A characteristic feature of ad hoc networks is the infrastructure less and seamless connectivity of the wireless mobile nodes. Mobility plays an important role in the connectivity of these nodes. In this paper a performance comparison of five important mobility models; community model, Group Force Mobility Model (GFMM), Reference Point Group Mobility (RPGM), Manhattan Mobility Model and Random Waypoint-Steady...
A mobile ad hoc network (MANET) is an infrastructure-less system having no designated access points or routers and it has a dynamic topology. MANETs follow a distributed architecture, in which each node can move randomly in an area of operation. MANETs are vulnerable to various attacks. Security services in these kinds of networks are more complex than in traditional networks. In this paper, we implement...
Unicast routing, which discovers a path between a source-destination pair, is a challenging problem for wireless ad-hoc networks. Mobility demands additional requirements to be fulfilled during path selections. A neighbor v of a node u, is called ldquostablerdquo if v's relative movement with respect to u is very low. A path between a source-destination pair is called ldquostablerdquo if it consists...
We consider the question of obtaining tight delay guarantees for throughout-optimal link scheduling in arbitrary topology wireless ad-hoc networks. We consider two classes of scheduling policies: 1) a maximum queue-length weighted independent set scheduling policy, and 2) a randomized independent set scheduling policy where the independent set scheduling probabilities are selected optimally. Both...
Hybrid wireless-optical broadband access network (WOBAN) optimizes the cost and performance of an access network. A cost-effective way of increasing the capacity of the wireless part of a WOBAN is to assign multiple radios to the wireless nodes. An efficient channel assignment scheme is essential to reduce delay and contention in the wireless front-end of WOBAN. We study a channel assignment scheme...
In this paper "an efficient hybrid routing protocol for MANET using direction dependent bordercasting (MEHRP)rdquo with high data delivery ratio has been proposed. The major problems of reactive routing viz. flooding of route request packets and link breakage is reduced by this algorithm. The frequency of location update is reduced in this algorithm compared to the existing location based routing...
In multiparty MAC, a sender needs to transmit each packet to a set of receivers within its transmission range. Bandwidth efficiency of wireless multiparty MAC can be improved substantially by exploiting the fact that several receivers can be reached at the MAC layer by a single transmission. Multiparty communication, however, requires new design paradigms since systematic design techniques that have...
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