Wireless Communications: Principles and Practice
Wireless Communications: Principles and Practice
Routing in multi-radio, multi-hop wireless mesh networks
Proceedings of the 10th annual international conference on Mobile computing and networking
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We consider the problem of mitigating interference and improving network capacity in, single-radio, single-channel, wireless multi-hop network. An ongoing aim of our research is to design a routing metric which is cognizant of interference. Modelling routing with a complete set of interference constraints is a NP-hard problem. One major issue to be addressed is to infer the degree of interference among different flows. To address this issue, and based on the measurement of the received signal strengths, we propose a 2-Hop interference Estimation AlgoRithm (2-HEAR). With the use of the received signal level, a node can calculate the signal to interference plus noise ratio (SINR) of the links to its neighbors. The calculated SINR is used to infer the packet error rate (PER) between a node and each of it Ist tier interfering nodes set. Then the residual capacity at a given node is estimated using the calculated PERs. A cost function is used at the aim of load-balancing between the different flows within the network.