基于冲突解决的功率控制MAC协议  

Power control MAC protocol based on collision resolution

作　　者：郝岩[1] 韩江洪[1,2] 冯琳[1] 魏振春[1,2] 徐祥伟 

机构地区：[1]合肥工业大学计算机与信息学院,安徽合肥230009 [2]安全关键工业测控技术教育部工程研究中心,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2017年第9期1199-1203,1208,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(61370088;61502142);国家国际科技合作专项资助项目(2014DFB10060)

摘　　要：功率控制策略可以降低网络能耗,提高信道利用率,然而也会引入更多的隐藏终端,使网络冲突加剧。为了利用功率控制的优势,同时减少网络冲突,文章提出一种应用于无线自组网采用功率控制的介质访问控制(media access control,MAC)协议——反馈功率控制(reactive power control,RPC)协议。在RPC协议中,数据传输过程中的各帧均采用最优发送功率,以降低能耗,提高网络信道利用率,同时,当冲突发生时,协议根据干扰节点是否欲与被干扰节点通信将冲突划分为2类,据此协调节点的数据传输过程,提高网络通信的并行程度,减少数据的重传。仿真实验表明,RPC协议在网络吞吐量方面比SHUSH协议有所提高,同时也减少了网络端到端延迟。Power control can reduce the energy consumption and increase spatial reuse, but more hidden terminals are introduced because of the asymmetric transmit power, which leads to more collisions. To take full advantage of power control and reduce the collisions, a power control media access control （MAC） protocol for wireless Ad Hoc network, reactive power controI（RPC） protocol, was proposed. In RPC protocol, all frames in the process of communication use the optimal transmit power to reduce energy consumption and improve the channel utilization. Furthermore, when the collisions happen, based on whether the interferer will communicate with the interfered node, RPC protocol divides the collisions into two categories and makes the appropriate measures to increase more concurrent trans- missions and reduce retransmission. The results of simulation experiments show that RPC protocol performs better than SHUSH protocol in network throughput and end-to-end delay.

关 键 词：功率控制 MAC协议 隐藏终端 信噪比 无线自组网 

分 类 号：TN915.04[电子电信—通信与信息系统]