Performance Evaluation of Relay Selection Schemes in Two-Way AF Relay Networks
Shahriar Shirvani Moghaddam, Fahimeh Baramaki Yazdi · International journal of communication · 2014
In this paper, five relay selection schemes, Non Selection (NS), Optimal Selection (OS), Max-Min Selection (MMS), Max Sum rate Selection (MSS) and Hybrid Selection (HS) are considered. At first, for different number of relays and transmission rates, the outage probability of five relay selection schemes are compared in two-way Amplify and Forward (AF) relay networks. Simulation results show that the performance of MMS, OS and HS schemes are approximately equal and their performances are higher than two other schemes, MSS and NS. These results show the effect of relay selection scheme on two-way AF case which is not exactly the same as results obtained from Decode and Forward (DF) case. As the second part of this research, different power allocation scenarios are examined. Simulation results show that the best power allocation scenario for both AF abd DF relays which offer lower outage probability can be achieved when half of the total power is assigned to the selected relay node and the other half is equally divided between the two transceivers.