Simulation and analysis on the three-way handshaking time of the coordinated distributed scheduler in IEEE 802.16 mesh mode

In this paper, we study the performance of the coordinated distributed scheduler in IEEE 802.16 mesh mode. In the coordinated distributed scheduler, the three-way handshaking procedure, which is used for data slot scheduling, is a vital important part of the network performance. In this paper, the three-way handshaking time is newly defined from the reasonable aspect of engineering practice, arguing that the waiting time, which is caused by failures in the competition for transmission opportunities before sending the first handshaking message, should be the first part of the three-way handshaking time. Meanwhile, the slot sending the last handshaking message is defined as the end of the three-way handshaking procedure. The handshaking messages are carried in DSCH messages, one kind of scheduling control messages which obtain transmission opportunities through mesh election competition procedure in coordinated distributed scheduler. Mesh election competition procedure has a significant effect on the three-way handshaking time, so the decisive parameters of mesh election competition procedure have a great influence on the three-way handshaking time. On such parameters, we provide and compare the simulation and analytical results of the three-way handshaking time defined in this paper with others.