A Novel QoS-Supported MAC Protocol for Wireless Network with Smart Antennas

A Novel QoS-Supported MAC Protocol for Wireless

Network with Smart Antennas

YANGJun;LIJiandong;ZHOUXiaodong

【期刊名称】《电子学报：英文版》

【年(卷),期】2005(014)003

【摘要】A QoS (Quality-of-Service)-supportedad ptive slot allocation multiple access protocol QASAMA) is proposed for the wireless network with mart antenna at basestation. Time-dlvision duplexing TDD) is used in the QASAMA protocol. Driven by the asestation, each active Mobile terminal (MT) transmits training sequence at the beginning of each frame, so he spatial signature of the active MT can be obtained by the smart antenna. Based on the optimal Signal-to-interference-plus-noise ratio (SINR) beamforming, two slot allocation algorithms, Point-by-polnt optimizing (PPO) and Global optimizing (GO), are presented. On condition that provides QoS for voice and data traffics, the basestation dynamically schedules uplink and downlink traffic transmission so that multiple packets can be transmitted simultaneously in one traffic slot. Therefore, Spacedivision-multiple-access (SDMA) is realized. Approximate analysis of channel utilization is presented. Simulation results show that the proposed protocol can support the application of smart antennas effectively and provide high channel utilization and QoS for voice and data traffics.