CAJ | 학술논문

针对传统传输控制协议（TCP）在高带宽、无线网络中性能表现不佳的问题, 建立了一个端到端的虚拟路由器模型, 提出了一个端到端的发送端比例积分（PI）速率控制算法。根据RTT的变化, 利用PI控制器计算发送端的发送速率, 使瓶颈节点的队长稳定在一个目标位置, 减少拥塞丢包, 避免无线链路错误丢包引起的对拥塞窗口的错误调整。仿真结果表明, 与传统拥塞控制协议相比, 新机制能较好地控制路由器队长、提高网络负载的稳定性和网络吞吐率。
침대전통전수공제협의（TCP）재고대관、무선망락중성능표현불가적문제, 건립료일개단도단적허의로유기모형, 제출료일개단도단적발송단비례적분（PI）속솔공제산법。근거RTT적변화, 이용PI공제기계산발송단적발송속솔, 사병경절점적대장은정재일개목표위치, 감소옹새주포, 피면무선련로착오주포인기적대옹새창구적착오조정。방진결과표명, 여전통옹새공제협의상비, 신궤제능교호지공제로유기대장、제고망락부재적은정성화망락탄토솔。
The traditional TCP performs worse in high-bandwidth and wireless network. This paper proposed an end-to-end virtual router model and a PI rate control algorithm at sender. According to the change of RTTs, the algorithm calculated the data sending rate using PI controller, stabilized the queue length of bottleneck router at a target level, reduced congestion packet loss and the mistaken adjustment to congestion window caused by wireless link error packet loss. The simulation results show that, the new mechanism can flexibly control the queue length, improve the stability and throughput of the network.