一种基于用户的自适应安排多址接入协议

A user adaptive scheduling multiple access protocol

提出了用户根据业务积压情况自适应安排传输的多址接入协议(UASMA),它利用自组织算法确定网络中处于激活态节点的个数,使用轮询的方式妥善安排分组的传输,根据用户业务量合理地调整节点每次传输的分组数.它采用独特的帧结构,并提出参考帧长的概念,大大提高了信道的利用率.UASMA协议同时提出了一个高效的接入竞争解决算法,保证激活节点能够迅速接入信道.最后对UASMA协议的性能进行了仿真研究,并与CSMA协议、轮询机制和UPMA协议进行比较,仿真结果表明UASMA协议具有更优越的性能.

A new multiple access control (MAC) protocol-the User Adaptive Scheduling Multiple Access (UASMA) protocol is proposed, which can perfectly schedule the packet transmission according to the exact number of active mobile terminals (MTs) determined by the self-organizing algorithm, and can adjust the number of packets sent by one node in one frame properly. The UASMA protocol employs a unique frame structure and presents the concepts of Referenced-Frame-Length, thus increasing the utilization ratio of the channel greatly. Meanwhile, the UASMA protocol proposes an efficient collision resolution algorithm for guaranteeing that active MTs can access the channel rapidly. Finally, the performance of the UASMA protocol is evaluated by simulation and compard with CSMA, Rouding-Poll and UPMA protocols, with the simulatoin results showing that the former has better performance than the latter.