Abstract— In any cooperative wireless networks the presence of many mobile stations willing to forward and help in delivering information packets to the destination helps in achieving Cooperative Diversity. The real test is to make sure that the communication is Reliable? Many mobile nodes vary in size and thus having limited energy battery cells and energy scavenging abilities. This paper is on relay selection mechanisms for wireless cellular networks. Our mechanism selects the relays which are satisfying the conditions present at both the physical layer and also at the network layer. For the physical layer we first calculate only those relays in which the Signal to Noise (SNR) ratio to the destination is above the threshold, through which we can further calculate the Bit Error Rates (BER). For the Network layer we use the metric of Network Lifetime and for this we calculate Residual Energy(RE) of the relay nodes. Our algorithm has the advantage of selecting the best relay at both the physical and also at the network layer.

Index Terms— Cooperative Cellular Networks, Rayleigh Fading, Relay Selection, Amplify and Forward, Signal to Noise Ratio, Residual Energy, Bit Error Rate.

Cite:Samad Baseer and Kazi M. Ahmed , "A Reliable Relay Selection index for Cross layer Approach for Cooperative Cellular Networks ," Journal of Communications, vol. 6, no.8, pp.591-600, 2011. Doi: 10.4304/jcm.6.8.591-600