【摘要】 本文提出了一种新的、支持数据 /话音业务并传的多址接入协议———根据用户数目妥善安排分组传输的多址接入 (User dependentPerfect schedulingMultipleAccess———UPMA)协议 ,它根据实际需求对上、下行带宽资源实行动态分配 .UPMA协议对不同的业务类型赋予不同的优先级 ,并用轮询方式妥善地安排节点的分组传输 ;同时 ,它采用独特的帧结构 ,使话音业务总是能够得到优先传输 .本文还提出了一种高效的竞争接入算法 ,以保证激活的节点能够快速接入信道 .最后 ,对UPMA协议的性能进行了仿真并与MPRMA协议的性能进行了比较 ,结果证明UPMA协议有更好的性能 .更多还原

【Abstract】 A novel multiple access control (MAC) protocol--User dependent Perfect scheduling Multiple Access (UPMA) protocol,which supports joint transmission of voice and data packets,is proposed.By this MAC protocol,the bandwidth can be allocated dynamically to the uplink and downlink traffic according to their respective service requirements.UPMA protocol endows different priority levels to different types of traffic,and can perfectly schedule the transmission of mobile terminals (MTs) by means of polling.Meanwhile,a unique frame structure is designed to guarantee that the voice traffic is always transmitted prior to the data traffic.Furthermore,an effective collision resolution algorithm is proposed to guarantee rapid channel access for activated MTs.Finally,performance of UPMA protocol is evaluated by simulation and compared with that of MPRMA protocol.Simulation results show that UPMA protocol has better performance.更多还原