摘要
研究和分析了无线自组网中的功率控制的问题。从无线自组织网络中数据通信过程入手,分析了其MAC协议中功率控制的基本思想,并提出了功率控制算法,同时根据该算法改进了CSMA/CA协议的接入机制。详细介绍了改进后的CSMA/CA功率控制原理、推导了改进后的协议中数据发送功率的计算公式,以及改进后的CSMA协议的工作流程。最后对功率控制协议进行性能分析,分析表明信道利用率改进后的CSMA/PC协议比传统的CSMA/CA协议的一般高10%左右,改进后的协议能够达到提高网络容量、降低网络功耗的目的。
The power control question ofAd Hoc network is researched and analyzed based on the wireless data communication process. An analysis of power control idea in MAC protocol is made and an algorithm is brought forward. According to the algorithm, the protocol of MAC is improved. The improvement CSMA/CA power control principle, has inferred the data transmission power formula in the improvement protocol, and the improvement CSMA protocol work flow. Meanwhile, through the analysis of performance of the modified CSMA/PC protocol, the rate of channel utilization for CSMA/PC is 10% higher than about the traditional CSMA/CA protocol All in all, the capacity of the network is increased and the consumption is decreased.
出处
《计算机工程与设计》
CSCD
北大核心
2008年第24期6227-6230,共4页
Computer Engineering and Design
关键词
功率控制
MAC协议
无线自组织网
信道利用率
功耗
power control
MAC protocol
wireless Ad Hoc networks
channel utilization ratio
power consumption
