Location-Aware cooperative routing in multihop wireless networks

Geographic routing is a scalable routing scheme for wireless networks, where nodes make local routing decisions using position information. Cooperative transmissions utilize spatial diversity to combat fading in wireless channels. In this paper, we incorporate cooperative transmissions into geographic routing, and propose the Location-Aware Cooperative Routing (LACR). In LACR, a node that receives Route Request (RREQ) makes an individual decision on whether and how to rebroadcast RREQ based on its position and capability to cooperate. A theoretical analysis of the impact of cooperative transmissions on the transmission range extension is presented to guide the measurement of the potential performance of each node. Through simulation, we show that LACR performs better in terms of higher probability to find a route and higher throughput in comparison to Single-Input-Single-Output (SISO) based routing protocol.