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文章首先介绍了IEEE 802.16的mesh结构以及Mesh模式下协同分布式调度,对mesh结构下的三次握手机制进行了阐述,提出了原协议中三次握手机制的冲突问题,并在此基础上进行分析,针对所存在的冲突,提出了一种三次握手机制改进方法。通过分析和NS-2仿真表明,该方法性能较好,不但缩短了端到端时延,而且同时增加了吞吐量。
Firstly, this paper introduces the mesh structure of IEEE 802.16 and the coordinated distributed scheduling in Mesh mode, and expounds the mechanism of three-way handshake under the mesh structure. The conflict of the three-way handshake mechanism in the original protocol is proposed. Based on this analysis, Aiming at the existing conflicts, a method of improving the three-way handshake mechanism is proposed. The analysis and NS-2 simulation show that this method has better performance, which not only shortens the end-to-end delay but also increases the throughput.