Abstract:

In order to achieve a balance between the system transmit rate and fairness among relays, a loadbalance based relay selection scheme is proposed in the systems with multiple decode andforward (DF) relays. Moreover, the average transmission rate performance and the relay selection gain of the system are analyzed based on the extreme value theory. It can be seen that the requirements of both transmit rate and fairness can be satisfied with the proposed relay selection scheme. The system can achieve the relay selection gain and average transmission rate logarithmic to the relay node number.

Key words: Relay selection, The Extreme Value Theory, Relay network, Load balance