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为了解决现有接纳控制方案存在的对新数据流进入网络后的信道使用情况预测不够准确的问题,对IEEE 802.11e无线局域网的增强分布式信道访问(EDCA)模式下无线信道的各种状态进行分类,确定真正可利用的信道空闲时间,将新数据流带来的额外信道开销细分为退避时间、传输时间和碰撞时间,并给出每类时间开销的预测方法,从而为接纳控制方案提供更准确的判断依据。仿真试验证明,所提出的方案能做出更合理的接纳控制决策,并且具有更好的适应性。
In order to solve the problem of inaccurate prediction of the channel usage after the new data stream enters the network in the existing admission control scheme, various states of the wireless channel in the enhanced distributed channel access (EDCA) mode of the IEEE 802.11e wireless local area network Classifies and determines the truly available channel idle time and subdivides the additional channel overhead brought by the new data flow into the backoff time, transmission time and collision time, and provides a prediction method for each type of time overhead to provide the admission control scheme More accurate basis for judgment. Simulation results show that the proposed scheme can make a more reasonable admission control decision and has better adaptability.