Abstract：Employing smart antennas in the basestation of packet radio network is studied.An adaptive slot allocation multiple access protocol (ASAMA) is proposed.In ASAMA protocol,Time-Division Duplexing is adopted,and pilot signals are transmitted orderly by mobile terminals (MTs) at the beginning of one frame,so the spatial signatures of MTs can be obtained by the smart antennas.Based on the optimal SINR beamforming method,two slot allocation algorithms,which are point-by-point optimizing (PPO) and global optimizing (GO),are presented.On condition that all packets can be received successfully,the basestation dynamically schedules uplink and downlink traffic to achieve that several data packets can be simultaneously transmitted in one traffic slot.Therefore,efficient space-division-multiple-access (SDMA) can be obtained.Approximate analysis of channel utilization is presented.Simulations show that ASAMA protocol effectively supports the application of smart antennas and provides higher channel utilization and lower delay.
杨 军;李建东;周晓东. 一种新的有效支持智能天线应用的多址接入协议[J]. 电子学报, 2004, 32(10): 1600-1604.
YANG Jun;LI Jian-dong;ZHOU Xiao-dong. A Novel MAC Protocol for Packet Radio Network with Smart Antennas. Chinese Journal of Electronics, 2004, 32(10): 1600-1604.
2004, Vol. 32 
