How bad TCP can perform in mobile ad hoc networks

被引：42

作者：

Fu, ZG ^{[1
]}

Meng, XQ ^{[1
]}

Lu, SW ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Comp Sci, Los Angeles, CA 90095 USA

来源：

ISCC 2002: SEVENTH INTERNATIONAL SYMPOSIUM ON COMPUTERS AND COMMUNICATIONS, PROCEEDINGS | 2002年

关键词：

D O I：

10.1109/ISCC.2002.1021693

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Several recent studies have indicated that TCP performance degrades significantly in mobile ad hoc networks. This paper examines how bad TCP may perforin in such networks and provides a quantitative characterization of this performance gap. Previous approach typically makes comparisons by ignoring the inherent dynamics such as mobility, channel error, and shared-channel contention. Our work provides a realistic, achievable TCP throughput upper bound, and may serve as a benchmark for the future TCP modifications in ad hoc networks. Our simulation findings indicate that node mobility, especially mobility-induced network disconnection and reconnection events, has the most significant impact on TCP performance. TCP NewReno merely, achieves about 10% of a reference TCP's throughput in such cases. As mobility increases, the relative throughput drop ranges from almost 0% in static case to 1000% in highly mobile scenario (mobility speed is 20m/sec). In contrast, congestion and mild channel error (say, 1%) have less visible effect on TCP (with less than 10% performance drop compared with the reference TCP).

引用

页码：298 / 303

页数：6