A Simulation Study of Location- and Power-aware Wireless Networks with Asymmetric Links

Asymmetric links are common in wireless networks for a variety of physical, logical, operational, and legal considerations. An asymmetric link supports unidirectional communication between a pair of mobile stations and requires a set of relay stations for the transmission of packets in the other direction. We evaluate m-limited forwarding, a technique to disseminate information in locationand power-aware networks with symmetric and/or asymmetric links. Then we introduce a network and a MAC layer protocol for wireless networks with asymmetric links. The network layer protocol takes advantage of the location information to reduce the number of retransmissions and thus reduces the power consumption via the m-limited forwarding technique. The MAC layer protocol requires fewer nodes to maintain silence during a transmission than the protocols proposed in . We present a set of metrics characterizing the ability of a medium access control protocol to silence nodes which can cause collisions.