基于“热”节点轮转的无线传感器网络协议

PEGASIS-I协议是为了解决PEGASIS协议中信息传输时延长、网络维护代价大、节点与节点之间存在长链等缺点而提出的一种基于扇形的无线传感器网络协议,但该协议存在根节点能量负载过大、容易死亡的缺点。为了解决该缺点,在PEGASIS-I协议的基础上提出一种基于＂热＂节点轮转的新协议,新协议设计了＂热＂节点轮转机制与＂相似＂节点群择一发送机制。当网络中非叶子节点能量耗损过多时,＂热＂节点轮转机制可将其变成叶子节点,防止其过早死亡。＂相似＂节点群择一发送机制能显著减少网络通信量,进一步延长网络生存时间。Matlab仿真表明：与PEGASIS-I协议相比,新协议有效延长了网络生存时间。

WSNs protocol based on" hot" node rotation

PEGASIS-improved （PEGASIS-I）protocol based on fan is to solve the shortcoming of communication of long-delay, network maintenance cost and ＂long chain＂ between nodes in PEGASIS protocol, but energy load of root node is too large and it is easy to death in this protocol. In order to overcome this weakness, propose a new protocol based on ＂hot＂ node rotation on basis of PEGASIS-I protocol, new protocol designs mechanism of ＂hot＂ node rotation and mechanism of ＂similar＂ node group choose one to delivery. When non-leaf node in network consumes too much energy, the mechanism of ＂hot＂ node rotation turn it into leaf node to prevent it premature death. Mechanism of ＂similar＂ node group choose one delivery can significantly reduce network traffic, further extend network survival time. Matlab simulation shows that compared with PEGASIS-I protocol, the new protocol effectively prolong network survival time.