Abstract: Wireless Sensor Network ( WSN) has been considered as a promising method for reliably monitoring both civil and military environments under hazardous and dangerous conditions. Research in WSNs performance improvement is very important burgeoning field in our daily life. This paper was formed after studying the problem‘Shadow area in the RFID Communication' in the port which the sensors are widely deployed in. The problem exists in the communicalion of Reader to Tag. It shows us the out of range communication area of Reader to Tag communication. Through the proposed solution,we can not only resolve shadow area in the RFID communication, but also can save the cost of the network infrastructure comparing with the common method which just adds the Reader.The simulation results and analysis show that our solution could achieve a perfect performance of WSN in terms of the shadow area in the RFID communication.

Key words: Shadow area, Reader, Tag, Smart tag, Tag-to-Tag, Reader-to-Tag