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An approach to information sharing in mobile ad hoc networks (MANETs) used e.g. in rescue operations, is to store on every node a small amount of metadata describing what information resources exist in the network and where they reside, allowing applications to first search locally for information about suitable resources, and next request relevant information from a node that contains the resource...
Routing protocols play an important role for communications in MANET. Most of the protocols, however, use a single route and do not utilize multiple alternate paths. Thus a dynamic multi-path source routing (DMSR) protocol is proposed to improve existing on-demand routing protocols. It consists of three major phases, namely routing discovery, multi-path routing selecting and routing maintenance. In...
Based on the analysis of the node selfishness and the drawback of min-hop selection method as the unique routing selection criteria in ad hoc networks, a non-intrusive multi-metric ad hoc routing protocol-NIMR is presented. By computing and storing the node fame, NIMR greatly attenuates the influence of node selfishness; By crossing-design between MAC layer and network layer, we employ a non-intrusive...
Dynamic resource allocation improves the performance of multiuser OFDM systems by exploiting multiuser diversity. Cooperative diversity is a technique where multiple users share their resources to realize a spatial diversity gain through cooperation. In this paper, the problem of downlink subcarrier allocation in a cooperative multiuser system is investigated. We assume a single-cell case where the...
Multimedia and real-time applications require bandwidth guarantees, which may be achieved by resource reservation. However, resource reservation in ad-hoc networks is a very challenging task due to the instability of radio channels, nodes mobility and lack of coordination between mobile nodes. Previously proposed reservation MAC protocols like CATA, FPRP and R-CSMA have limitations. They consider...
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