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Improving the Performance of TCP/RLP over CDMA Forward Link  

송기영 (삼성전자 정보통신)
박영근 (연세대학교 전기전자공학과 컴퓨터통신네트워크연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.28, no.5B, 2003 , pp. 369-380 More about this Journal
Abstract
In the CDMA wireless link, frame errors are correlated and burst because of fading. The implementation ability of RLP error recovery is dependent on the correlated frame errors. The (1,2,3) retransmission scheme, which is recommended as default in IS-707, is not adapted in high frame loss regime with strong correlations. By using the modified error recovery method, where the total number of retransmission attempts is the same and the retransmission is increased, the proposed retransmission scheme can efficiently recover frame errors than the (1,2,3) retransmission scheme. Since the modified scheme has longer transmission delay due to the increase of retransmission round, we propose the algorithm of retransmission failure prediction to improve the modified error recovery scheme. We simulate the modified error recovery scheme applying our algorithm and compare two schemes. (i.e. default scheme by IS-707 and modified scheme) not applying our algorithm. In the result, we show TCP performance improvement is better than default scheme by IS-707.
Keywords
CDMA; RLP; TCP;
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