CAJ | 학술논문

在无线局域网中，当节点采用竞争方式访问信道时，隐藏终端和其他节点可能同时利用信道发送数据，引起数据碰撞。在CSMA/CA协议中，增加数据收发的控制分组，正确表示数据收发开始和停止的时间，代替网络分配矢量(NAV)，使得隐藏终端和其他节点按照先后顺序发送数据，实现可靠的数据传输。在CC2530芯片设计的方法中，实验结果表明降低了隐藏终端干扰造成的误码率；在NS-2仿真器评估的方法中，仿真结果表明控制分组对于网络其他性能影响小。通过两种方法验证了改进MAC协议的有效性。
재무선국역망중，당절점채용경쟁방식방문신도시，은장종단화기타절점가능동시이용신도발송수거，인기수거팽당。재CSMA/CA협의중，증가수거수발적공제분조，정학표시수거수발개시화정지적시간，대체망락분배시량(NAV)，사득은장종단화기타절점안조선후순서발송수거，실현가고적수거전수。재CC2530심편설계적방법중，실험결과표명강저료은장종단간우조성적오마솔；재NS-2방진기평고적방법중，방진결과표명공제분조대우망락기타성능영향소。통과량충방법험증료개진MAC협의적유효성。
When the node contends channel in wireless local area networks,it will occur data collision because the hidden terminal and other node may access channel concurrently. In the CSMA/CA protocol,the control packets is used for representing starting or stopping of data transmission time instead of Network Allocation Vector ( NAV) ,thus the data is send in sequence for the hidden terminal and other node,realizing reliable data transmission. Experiments on the CC2530 chip show that the error rate of hidden terminal interference is re-duced. Simulations on the NS-2 show that the control packets had less impact on other network performances. The effectiveness of im-proved MAC protocol is proved by two methods.