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在着重介绍了Ｏｍｎｉｎｅｔ 网络通信协议ＣＳＭＡ／ＣＡ 的仿真分析与结果的基础 上，建立了信息包为定长、变长以及考虑应答包情况下的仿真模型。讨论了用户工作 站数目、信息包长度以及应答包对系统性能的影响。通过对ＣＳＭＡ／ＣＡ协议与非持 续ＣＳＭＡ协议进行比较分析发现，ＣＳＭＡ／ＣＡ协议的性能优于非持续ＣＳＭＡ协议。
Based on the simulation analysis and result of Omninet network communication protocol CSMA / CA, the simulation model of packet length is given and variable length is taken into account. The number of user workstations, the length of the packet, and the impact of the response packet on the system performance are discussed. By comparing the CSMA / CA protocol with the non-persistent CSMA protocol, it is found that the performance of the CSMA / CA protocol is better than that of the non-continuous CSMA protocol.