International Journal of Engineering Sciences & Research Technology (IJESRT)
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. 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 the authors need to place relay nodes in source and destination if distance of source and destination is large than range of wireless sensor node.