A Cross-Layer Design Based on Geographic Information for Cooperative   Wireless Networks
  Most of geographic routing approaches in wireless ad hoc and sensor networks do not take into consideration the medium access control (MAC) and physical layers when designing a routing protocol. In this paper, we focus on a cross-layer framework design that exploits the synergies between network, MAC, and physical layers. In the proposed CoopGeo, we use a beaconless forwarding scheme where the next hop is selected through a contention process based on the geographic position of nodes. We optimize this Network-MAC layer interaction using a cooperative relaying technique with a relay selection scheme also based on geographic information in order to improve the system performance in terms of reliability. 
Teck Aguilar and Mohamed Chedly Ghedira and Syue-Ju Syue and Vincent   Gauthier and Hossam Afifi and Chin-Liang Wang
cs.NI cs.PF