Optimal Placement of Relay Nodes in Multi-pair Co-Operative Network to Increase System Capacity in WSN

With the advancement of technology the usage of wireless sensor network are increasing day by day. There are two types of sensor networks: Single tiered and multi-tiered [5]. In single tired sensor network there is one sink and multiple sources and in multi-tiered sensor network there are multiple sources and multiple destination. For the proper transmission of data we need to place relay nodes in source and destination if distance of source and destination is large than range of wireless sensor node. In this paper an optimal placement of relay node in multi-pair co-operative network has been presented so as to increase the system capacity.