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Cooperative communications can significantly enhance transmission reliability and bandwidth efficiency in wireless networks. However, many upper layer aspects of cooperative communications merit further research. In this paper, we investigate its impacts on network topology and network capacity, which is determined by considerable aspects, such as physical layer capacity, interference, path length,...
We study the minimum cut between one source and one terminal in a dynamically changing random wireless ad hoc network that is modeled as a random geometric graph. The nature of ad hoc networks is accounted for by letting nodes join and leave. Given the values of all cuts that can be formed in the original network and assuming information about the nodes that join or leave, expressions for the expected...
In this paper dissemination algorithms to transfer warning messages from the originator node to the remaining recipient nodes within a specified geographic area are considered. Analytical methods are developed to obtain time-probabilistic characteristics of these algorithms for linear network topology and fixed success probability of one-hop transmission. The applicability of the obtained results...
Coding advantage refers to the potential for network coding to improve end-to-end throughput or reduce routing cost. How large can the coding advantage be? We investigate this fundamental question in the classic undirected network model. So far, all known networks where such potential exists are based on a special class of topologies known as combinatorial networks. We try to prove a rather small...
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