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无线通信网络中,业务流在数学上呈现出一种统计上的自相似性.本文结合该流量特性,针对如何改善高负荷、高业务流量突发环境下网络性能的问题,给出一种基于节点突发流量的信道访问退避策略:通过动态监测和计算当前节点突发流量的大小来调整信道接入,从而减少碰撞次数,提高信道利用率;为解决算法公平性的问题,同时引入了节点流权值w(i).通过流量特性适应机制及节点流加权机制,使得网络在提高性能的同时能尽量减小算法不公平现象所造成的影响.理论分析及仿真结果均表明:在网络业务量突发性强、信道竞争激烈的情况下,该策略能有效缩短信道接入时延,排队长度等各项网络性能指标.
In the wireless communication network, the business flow presents a kind of statistical self-similarity mathematically.In this paper, aiming at the problem of how to improve the network performance under the high-load and high-traffic emergencies environment, Channel access backoff strategy for node burst traffic: Channel access is adjusted by dynamically monitoring and calculating the current burst size of the current node to reduce the number of collisions and channel utilization; in order to solve the problem of algorithm fairness, a node Flow weight w (i). Through the traffic characteristics adaptation mechanism and node flow weighting mechanism, the network can minimize the impact caused by the unfairness of the algorithm while improving the performance. The theoretical analysis and simulation results show that in the network service In the case of sudden burst of traffic and fierce channel competition, this strategy can effectively shorten the network performance indicators such as channel access delay and queuing length.