Relay Selection and Power Allocation Based on Incremental Relaying for Two-Way Relay Network With Asymmetric Traffics
Most of existing studies about two-way relay network rely on the assumption that two sources transmit with symmetric traffics, which is often unsatisfied in practical application. In this paper, the authors focus on asymmetric traffics for two-way relay network, and investigate how to minimize system outage probability. To achieve this objective, they first propose a strategy to combine Relay Selection (RS) and Incremental Relaying (IR), which is referred to as Proportional Max-Min selection plus Asymmetric Incremental Relaying (PMM-AIR). According to the expression of system outage event, they propose an Optimal-PMM (O-PMM) RS criterion that minimizes outage probability.