A Survey on Rendezvous Based Techniques for Power Conservation in Wireless Sensor Networks

Power conservation is a vibrant research area in wireless sensor networks. Several research works have demonstrated that energy can be conserved significantly using mobile sink in the sensor field, which will collect the data from the sensor nodes via single or multi hop communication. But, the mobility speed of the sink is low, due to which latency will be increased in sensor network especially in delay sensitive applications. To address this issue, various rendezvous based techniques have been described according to which a subset of sensor nodes from the field will be selected as rendezvous points (RPs). Remaining nodes will forward the sensed data to its nearest RP where data will be buffered. A path is then constructed using the RPs through which mobile sink will make a tour and collects the buffered data. This paper explains different rendezvous based techniques and analysis of their advantages and deficiencies with respect to power conservation.