Effects of relaying schemes in scalable wireless sensor networks

Wireless communication uses the open and shared medium to transmit data from one point to another point. Since data is shared in unbounded medium, so security attacks in wireless communication is more in comparison of other medium. Physical layer security (PLS) provides a new idea to consider the issues related to security. The effect of relaying schemes in traditional and pessimistic scenario has been performed in terms of secrecy rate. The situation in which relay helps the eavesdropper is assumed as pessimistic scenario. The obtained numerical results shows that for pessimistic scenario, DF relaying outperforms AF if source-relay channel gain is greater than an optimum value. Moreover, for better eavesdropper channel also, a non-zero secrecy rate is possible for relay-destination channel gain greater than a particular value using relaying schemes in traditional scenario.