고속 무선 PAN에서 TCP 전송 모드의 성능향상

Abstract

This paper proposes a new TCP transmission mode for the MAC protocol of IEEE 802.15.3 High-rate WPAN (Wireless Personal Area Network). The IEEE 802.15.3 WPAN has been designed to provide a very high-speed short-range transmission capability with QoS provisions. The unidirectional channel allocations for the guaranteed time slots, however, often result in poor throughput when a higher layer protocol such as TCP requires a full-duplex transmission channel. Currently, three methods for transmitting TCP traffic were proposed, which is based on standard. These methods, however, are inefficient because of channel utilization and collision avoidance problem. In this thesis we propose a mechanism, called TCP transfer mode, that provides the bidirectional transmission capability between TCP sender and receiver for the channel time allocations (CTAs) of the high-rate WAPN. As our scheme does not require additional control messages nor additional CTAs, the throughput of a TCP connection on the high-rate WPAN can be greatly improved. Our simulation results show that the proposed scheme outperforms any methods of TCP transmission according to the current standard of the WPAN.