Modeling TCP in a multi-rate multi-user CDMA system

Publication Date

2007

Journal or Book Title

NETWORKING 2007: Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet, Proceedings

Abstract

Abstract Modern CDMA wireless channels support multiple transmission rates, which can be dynamically assigned to users based on traffic demand. However, in practice, assignment of high rate channels comes with the penalty of increased power as well as smaller orthogonal codes, which constrains their assignment to only a subset of active users. This motivates the need to carefully control high rate channel assignments,so as to minimize,power and achieve fairness among users. In this work, we propose a simple class of channel allocation policies to achieve this goal for TCP sessions. We develop an analytical model,that explicitly captures both TCP dynamics,and the impact of multiple users contending for a shared resource to evaluate the performance,of the allocation policy. The model,is shown to be accurate by comparing,against ns-2 simulations and its utility demonstrated,by computing the minimum,number,of required high rate channels to minimize,contention. Index Terms TCP throughput, CDMA, Cellular, Resource allocation, Multi-user.

DOI

http://dx.doi.org/10.1007/978-3-540-72606-7_35

Pages

403-414

Volume

4479

Book Series Title

LECTURE NOTES IN COMPUTER SCIENCE

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