Outage Probability of Joint Relay Selection and Power Allocation for Two-Way Relay Networks over Rayleigh Fading Channels

This paper investigates the outage probability of joint relay selection and power allocation for two- way relay networks over Rayleigh Fading channels. Firstly, a tight lower bound of outage probability with equal power allocation is derived. Furthermore, a joint relay selection and optimum power allocation scheme is proposed, which minimizes the outage probability, then, a lower bound of outage probability is also obtained. Based-on the closed-form outage probabilities, we obtain a relay selection strategy, which requires only a single integer parameter to be broadcasted to all relays. The analysis is verified by using Monte-Carlo simulations.