Performance of multihop wireless networks: shortest path is not enough

摘要: Existing wireless ad hoc routing protocols typically find routes with the minimum hop-count. This paper presents experimental evidence from two test-beds which shows that there are usually multiple hop-count paths, many of have poor throughput. As a result, minimum-hop-count often chooses significantly less capacity than best paths exist in network. Much reason for this is radio links between nodes loss rates low enough protocol willing to use them, but high much consumed by retransmissions. These observations suggest more attention be paid link quality when choosing routes; measured characteristics likely useful devising better path metric.