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本文在二进制指数退避算法基础上提出一种基于拥塞避免的自适应退避算法.该算法引入了拒绝帧NTS,使接收节点具有拒绝发送节点发送请求的能力;另外通过将接收节点的拥塞状况反馈到发送节点,使发送节点可以根据自身待发送数据流的QoS属性和接收节点的拥塞状况自适应地调整退避参数,最终实现对高优先级数据流的保护.仿真结果表明,该算法能有效地保护高优先级数据流的端到端吞吐量、减小其分组重传次数以及分组时延,从而达到提高系统性能的目的.
In this paper, an adaptive back-off algorithm based on contention avoidance is proposed based on binary exponential backoff algorithm. This algorithm introduces a reject frame (NTS) so that the receiving node has the ability to reject the sending node to send a request. In addition, by feeding back the congestion status of the receiving node Sending node so that the sending node can adaptively adjust the backoff parameter according to the QoS attribute of the data stream to be sent and the congestion status of the receiving node to finally protect the high priority data stream.The simulation results show that the algorithm can effectively protect The end-to-end throughput of high-priority data streams reduces the number of packet retransmissions and packet delays, improving system performance.