WSAN二次分簇架构模型中实时路由策略研究

Research on real-time routing strategy in WSAN secondary clustering architecture model

为解决无线传感器／执行器网络受到干扰导致实时性降低的问题，提出基于节点间数据传输成功率的实时分簇路由协议（RCRPSR）。通过节点一次成簇、节点二次成簇、执行器节点到sink节点路由选择，选择数据传输成功率较高的路径传输数据，降低传输失败的概率，减少数据传输时延，提高网络实时性，同时使用二次分簇架构，划分了3层网络和3种不同功能的节点，使不同功能的节点采用不同的发射功率，在保证网络连通性的同时减少能量消耗，延长了网络寿命。仿真结果表明，在网络中数据传输成功率下降时，相比传统协议，采用RCRPSR协议传输时延降低2—5倍。

When wireless sensor/actuator network is disturbed, the real-time performance of the network might be affected. To solve this problem, a real-time clustering routing protocol based on success rate of data transmission between nodes is proposed. By first-level node clustering, second-level node clustering and actuator node to sink node routing strategy, the protocol selects a data transmission path with highest success rate. The path reduces the transmission failure rate and data transmission delay, as a result the real-time performance of the network is im- proved. At the same time, the protocol uses secondary sub-cluster architecture to divide the network into three lay- ers. Each layer contains a type of nodes, and different nodes have different transmission power. This architecture ensures network connectivity and reduces energy consumption. So the lifetime of the network is extended. The sim- ulation results show that when the success rate of network data transmission drops, RCRPSR protocol reduces the transmission delay by 2 - 5 times than traditional protocols.