An OVSF Code Based Routing Protocol for Clustered Wireless Sensor Networks

LEACH series protocols are low energy consumption adaptive clustering routing protocols in wireless sensor networks which were firstly proposed by MIT scholars. Considering the disadvantages of the TDMA mechanism which has been used in LEACH series protocols, such as long time delay and high energy consumption, an improved routing protocol based on OVSF code in clustered sensor networks is proposed. Facilitated by its orthogonality and incoherence, the transmission can be realized based on the demands of the node, but not the time slot, during which the member node has to transmit data to the cluster heads. The simulation results show that the proposed OVSF code based routing protocol greatly reduces delay and energy consumption compared with TDMA based protocols.