On the Use of SINR for Interference-aware Routing in Wireless Multi-hop Networks

We consider the problem of mitigating interference and improving network capacity in wireless multi-hop networks. An ongoing aim of our research is to design a routing metric,which is cognizant, of interference. To address this issue, and based oil 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 call 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 its first tier interfering nodes set. Then, the residual capacity at, a given node is estimated using the calculated PERs. Based on the capacity estimation analysis, a new routing metric, EBC (Estimated Balanced Capacity), is proposed. EBC uses I cost, function at the aim of load-balancing between the different flows within the network. Extensive simulations shows that EBC improves tremendously the network capacity and also enhances the VoIP calls quality.