Abstract
This paper analyzes performance of Transmission Control Protocol (TCP) in multi-hop cellular networks. Multi-hop transmission shortens communication distance and can make channel quality at each hop better. However it needs channel resources at every hop for packet transmission, and thus effective throughput on end-to-end links can be decreased. Related researches have shown that multi-hop transmission may reduce TCP performance in the systems. However, it may be because improvement of channel quality derived by multi-hop transmission has not been considered fairly. We analyze TCP performance with considering channel quality improvement on a multi-hop system. By simulation, we derived the throughput gain by multi-hop transmission for various values of the number of hops. We also have analyzed the gain according to position of active users in a cell. From the results, we show that multi-hop transmission can improve TCP performance, especially for the users near the cell edge. We also show a proper number of hops that gives maximum TCP performance.
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