短波地空网中一种动态TDMA协议设计与仿真

摘要

Aiming at the great waste of channel source when business is not uniform between of nodes in the TDMA network,this paper designed a dynamic TDMA protocol based on neighbor timeslot remove (NTR-TDMA),the more reliable ground node utilize timeslot dynamically as the control center.It proposed the neighbor timeslot remove algorithm (NTR-ALG),the ground node divides the business timeslot boundaries of nodes according to the request timeslot number of nodes.And it made the performances comparision with HFTP protocol and TDMA protocol by OPNET.Simulation results show that NTR-TDMA protocol has better performance than HFTP protocol and TDMA protocol on the parameters of message delivery radio,traffic delay and network throughput.%针对传统TDMA网络节点间业务量不均匀时,会造成信道资源严重浪费的问题,设计了一种基于邻居时隙调动的短波地空网动态TDMA协议(NTR-TDMA),以可靠性较高的地面节点作为控制中心,实现时隙分配可控下的动态利用.提出了邻居时隙调动算法(NTR-ALG),地面节点根据时隙估计过程后生成的节点时隙请求数,调动相邻业务时隙节点间的空闲时隙,重新划分节点业务时隙界限.利用OPNET平台进行性能仿真,并与HFTP协议和TDMA协议作了对比分析.仿真结果表明,NTR-TDMA相比HFTP协议和TDMA协议,在消息投递率、平均时延和吞吐量方面具有更优异的性能.