时隙Aloha网络中基于演化博弈论的接入控制研究*

考虑到时隙Aloha网络中的非合作系统行为,并针对该网络中存在的不稳定区域及带宽受限问题,建立基于演化博弈论的时隙Aloha网络接入控制模型,并在该模型的基础上提出ABEGT协议。ABEGT协议在考虑用户有限理性的前提下,既保证了系统稳定性,也提高了网络的吞吐量。同时证明了时隙Aloha网络的接入控制中存在演化稳定策略。最后使用MATLAB仿真,结果表明ABEGT协议不仅减少了用户的冲突,而且提高了网络资源的利用率和网络整体的稳定性。

Access control research based on evolutionary game theory in slotted-Aloha network

Considering the problems of the noncooperation system behavior of slotted-Aloha network,the existing instable areas and the bandwidth-limited of network,this paper established an access control model of slotted-Aloha network which was based on evolutionary game theory,then proposed ABEGT protocol.Under considering bounded rationality of users,ABEGT protocol ensured the stability of the system and improved throughputs of the network.Meanwhile,it proved that there was an evolutionarily stable strategy in the slotted-Aloha network.Finally,by using MATLAB,the results indicate that ABEGT protocol not only reduces the users’ interference,but also improves the utilization ratio of network resources and the stability of the whole network.