Performance Enhancement of LTE-A, a Multi-Hop Relay Node, by Employing Half-Duplex Mode

Relay stations are usually used to improve the signal strength for users near a cell edge, thus extending cell coverage. This paper proposes a study on the performance of a multi-hop relay network. This work introduces half-duplex relay with two scenarios. The first scenario is that wherein the relay node (RN) acts to amplify and forward (AF) and decode and forward (DF), where the relay and user equipment (UE) are fixed. The second scenario is that wherein the proposed UE moves with angular velocity around RN, whereas RN moves with horizontal velocity toward the base station (BS) and UE. The performance measures of each scenario are represented, where the impact velocity on the latency time and system capacity is explained. Both simulation and analytical calculations are provided.