Collision-Optimized Stateless Geographic Forwarding Protocol for Wireless Sensor Networks
Hong Wang · Chuangan jishu xuebao · 2008
In the stateless geographic forwarding protocols,a sender's next-hop forwarder is selected based on the contention of all the suitable candidates at current time.When the candidates send back their CTS packets to contend for the forwarding right,there exists a high collision probability,which severely degrades the protocol performance.For solving the CTS collision problem,this paper proposes a new protocol which allows the sender to assign recently used forwarders as the preferred candidates in the RTS.When the RTS is sent out,if there are preferred candidates hitting,the CTS collision can be totally avoided,and if all the preferred candidates are missed,the forwarder can still be selected by the contention method.The protocol also provides an effective CTS collision resolution algorithm.Analysis and simulation prove the protocol's superiority over other existing protocols of the same class.