基于非合作博弈功率控制的传感器网络并行传输MAC协议

摘要

针对传统的基于竞争或调度的MAC协议用于节点密集部署的无线传感器网络中,会出现较低的吞吐量和累计延迟等问题,利用节点密集部署的无线传感器网络中普遍存在的捕获效应对MAC协议性能的影响,提出了一种单信道模式下工作的并行传输的新型高效MAC协议——基于非合作博弈功率控制的并行传输MAC协议.该协议运用博弈理论中非合作不完全信息博弈算法模型,实现了多个节点在同一信道上采用最优功率进行并行传输.应用贝叶斯Nash均衡定理证明了该协议的基于博弈理论的功率控制算法的Nash均衡的存在性和唯一性.仿真实验证明该协议能够实现多个节点在干扰范围内并行地进行数据传输,能显著地提高网络吞吐量、减少数据传输延迟并实现能量的高效利用,有效提高信道资源的空间复用效率.%Considering that traditional competitive or scheduling MAC protocols are not suitable for wireless sensor networks with high-load and intensive nodes due to the occurrence of low throughput and accumulated delay when u-sing them, this paper proposes an efficient concurrent transmission MAC protocol for power control in wireless sensor networks based on the non-cooperative game theory that works in one channel mode. The protocol uses the non-cooperative game theory and an incomplete information power control algorithm to achieve multiple link concurrent transmission at the same channel. The Bayesian Nash equilibrium theorem is introduced to prove the existence and the uniqueness of the Nash equilibrium of the protocol' s non-cooperative game theory based power control algorithm. The simulation results show that the proposed protocol can perform well in the interference environment for concurrent data transmission. Significantly, it can improve the network throughput, reduce the data propagation delay , and save energy. Also, because of the effective use of the channel resources, the spatial reusing efficiency can be improved significantly.