TCP Based Resource Allocation Method for Base Station Diversity System

This paper proposes an adaptive wireless link allocation technique based on the characteristic of TCP (Transmission Control Protocol) and system traffic. While previous studies of allocation methods considered a single wireless link communication, the goal of this study is to examine the use of multiple wireless links and to get them access the Internet from wireless terminals. By employing multiple wireless links, TCP performance is improved significantly. But the improvement depends on the wireless environment. Although Internet applications apply some network protocols such as TCP, UDP, etc., the allocation method should take into account some other protocols. The proposed system allocates several wireless links to wireless terminal. This allocation is based on the estimated TCP throughput and current traffic of each base station. The current traffic of each base station, which includes many network protocol¿s flows, is considered by the system. Our allocation method not only considers the effect of TCP, but it also considers the effect on other protocols. In addition, wireless links are preferentially assigned to the wireless terminal that has the largest performance improvement per wireless link. Therefore, the improvement in the whole system performance compared with the previous technique can be easily achieved. This achievement is fulfilled in spite of the allocation with a fixed threshold value in the conventional scheme.