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本文分析了无线远程通信时存在的隐藏终端问题,详细讨论了隐藏终端问题对CSMA协议性能的影响,为了克服隐藏终端问题,我们提出了一种新的信道访问协议-忙音多路访问(简称BTMA-1)协议,用理论和模拟两种方法分析了该协议的时延-吞吐率特性。结果表明,BTMA-1协议能有效地克服隐藏终端问题,它的最大信道利用率为0.76左右,在负载不太重时时延较小。本文还介绍了采用BTMA-1协议来实现微机无线网络的方法。
This paper analyzes the hidden terminal problems existing in wireless remote communication, and discusses in detail the influence of hidden terminal problems on the performance of CSMA protocol. In order to overcome the hidden terminal problem, we propose a new channel access protocol called Busy Multi-access (BTMA -1) protocol, the delay-throughput characteristics of the protocol are analyzed by both theoretical and simulation methods. The results show that the BTMA-1 protocol can effectively overcome the hidden terminal problem. Its maximum channel utilization is about 0.76, and the delay is small when the load is not too heavy. This article also describes the use of BTMA-1 protocol to achieve computer wireless network approach.