REFWA: An Efficient and Fair Congestion Control Scheme for LEO Satellite Networks
REFWA: An Efficient and Fair Congestion Control Scheme for LEO Satellite Networks
复制标题
DOI：
10.1109/tnet.2006.883130
复制
发表时间：
2006-10
期刊：
影响因子：
--
通讯作者：
T. Taleb;N. Kato;Y. Nemoto
中科院分区：
文献类型：
--
作者：
T. Taleb;N. Kato;Y. Nemoto
本文研究了多跳卫星网络系统中影响互联网协议通信主干传输控制协议（TCP）效率和公平性的一些问题。它提出了一种方案，允许卫星系统自动适应由于切换发生、空闲缓冲区大小和网络带宽延迟积而导致的活动 TCP 流数量的任何变化。所提出的方案有两个主要设计目标：提高系统效率和提高其公平性。通过将总流量速率与链路容量和总缓冲区大小之和相匹配来控制系统效率。另一方面，系统最小-最大公平性是通过根据各个流的 RTT 比例在各个流之间分配带宽来实现的。所提议的方案被称为递归、显式和公平窗口调整（REFWA）。仿真结果表明，REFWA方案大幅提高了系统公平性，减少了丢包数量，更好地利用了瓶颈链路。结果还表明，所提出的方案在连接穿越多个瓶颈且可用带宽可能随数据传输时间而变化的更复杂环境中正常工作
This paper examines some issues that affect the efficiency and fairness of the Transmission Control Protocol (TCP), the backbone of Internet protocol communication, in multi-hops satellite network systems. It proposes a scheme that allows satellite systems to automatically adapt to any change in the number of active TCP flows due to handover occurrence, the free buffer size, and the bandwidth-delay product of the network. The proposed scheme has two major design goals: increasing the system efficiency, and improving its fairness. The system efficiency is controlled by matching the aggregate traffic rate to the sum of the link capacity and total buffer size. On the other hand, the system min-max fairness is achieved by allocating bandwidth among individual flows in proportion with their RTTs. The proposed scheme is dubbed Recursive, Explicit, and Fair Window Adjustment (REFWA). Simulation results elucidate that the REFWA scheme substantially improves the system fairness, reduces the number of packet drops, and makes better utilization of the bottleneck link. The results demonstrate also that the proposed scheme works properly in more complicated environments where connections traverse multiple bottlenecks and the available bandwidth may change over data transmission time