无线接入网络的时延优化算法

Delay optimization algorithm for wireless access networks

针对无线接入网络,提出一种轻量级时延优化算法——跨层反压拥塞控制算法。该算法是一种不依赖流量源端和用户终端设备,可独立部署在无线网络设备中的算法。该算法依据队列长度,空口发送速率等信息,动态调整TCP确认报文(TCP ACK)中的接收窗口字段,在降低业务端到端时延的同时,降低无线网络设备总缓存,保障无线接入设备(AP)的总吞吐能力(吞吐损耗<5%)。对比传统的Cubic拥塞控制算法,在AP为拥塞点的场景下,可降低无线接入网络时延30%—40%;同时降低AP设备40%的缓存,降低丢包风险。

In wireless access networks,it proposed a l tion control algorithm ightweight delay optimization algorithm-cross-layer backpressure conges⁃.The algorithm is a traffic source-independent,user terminal device-independent algorithm that can be deployed independently in wireless network devices.Based on queue length,air interface transmission rate,and other information,the algorithm dy⁃namically adjusts the receive window field of TCP acknowledgment packets(TCP ACK)to reduce end-to-end latency while reducing the to⁃tal buffer of wireless network devices and ensuring the total throughput capacity of wireless access points(throughput loss<5%).Compared with the traditional Cubic congestion control algorithm,this algorithm can reduce wireless access network latency by 30%to 40%in scenari⁃os where the access point(AP)is congested,while also reducing the buffer of AP devices by 40%and lowering the risk of packet loss.