关键词: 无线传感器网络，任播，路由协议，链路质量，碰撞

Abstract: In Wireless Sensor Nctworks(WSN)，there is the probability of transmission failure and energy waste for retransmission because of link quality problem. Routing criteria of conventional anycast routing protocols are based only on routing distance but not in consideration of link quality problem, it will lead to unreasonable routing weight setting if we apply those protocols in WSN. A WSN anycast routing protocol based on link quality was proposed. Calculation of link duality was discussed. The routing criterion of our protocol is based on the hybrid of load balancing and minimum total energy cost,and we balanced the two factors by parameter a. In contrast to conventional anycat routing protocols,experiment results show that performances in WSN are improved in terms of energy balancing and network energy consuming hence network lifetime is optimized.

Key words: Wireless sensor networks, Anycast, Routing protocol, Link quality, Collision