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针对实时性设备接入传感器网络的需求,研究了传感器网络MAC层协议的保证时隙传送(GTS)竞争与传送协议,对可能的延迟作了估计并通过Petri网进行了仿真。仿真结果认为,在星型传感器网络中,当每个设备需求GTS1个时隙的时候,同时接入网络的设备不能超过7个,否则延迟将无法满足一般实时性要求,超过28个设备的时候某些GTS请求就会被拒绝
In order to meet the requirement of real-time equipment access to sensor networks, the guaranteed time slot transmission (GTS) competition and transmission protocols of MAC layer protocol in sensor networks are studied. The possible delays are estimated and simulated by Petri nets. Simulation results show that in the star sensor network, when each device needs GTS1 time slots, the number of simultaneous access networks can not exceed seven, otherwise the delay will not meet the general real-time requirements, when more than 28 devices Some GTS requests will be rejected