Recent Results on Relaying for LTE-Advanced

Relays are being proposed as key technology elements for LTE-Advanced (LTE-A). This paper shows that throughput gains of using relays in a cellular network (relative to a network without relays) are highly dependent on relay coverage which is defined as the percentage of users served by relays. System-level simulations and analysis is used to illustrate the impact of relay coverage on throughput performance. Techniques to further improve the performance gains are proposed.