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中文摘要：
针对多速率认知网络分析了不同体制网络间相互协作的动机及策略。基于排队论模型,提出了不同协作策略的时延分析模型,得到了不同类型用户的业务到达率、分组长度、信道传输速率与业务平均服务时间之间的解析关系,进而揭示了不同协作资源共享机制的时延性能以及适用的场景。数值仿真验证了分析模型的准确性和有效性,同时证明：通过合理利用用户间的协作,不仅可以更好地保障主用户业务的QoS性能,还可以有效提升次级用户的接入机会和QoS保障能力。
英文摘要：
The motivations and strategies of cooperation between heterogeneous networks were discussed for multi rate cognitive networks.Based on queuing theory,the delay analytical models for different cooperative strategies were pro-posed and the closed form analysis,which exactly shows the relationship among different users’ traffic arrival rate,packet length,transmission rate and service delay,was obtained to reveal the delay performance and appropriate applica-tion scenarios of different cooperative strategies.The simulation results confirm that the proposed analytical model is correct and effective.In addition,it shows that not only the QoS of primary user is better guaranteed,but also the access opportunity and QoS of secondary user are improved by cooperation dramatically.
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