Joint processing coordinated multipoint through relaying and less BS involvement -

Abstract

Joint processing coordinated multipoint (JP-CoMP) is a new technology in LTE-A adopted to enhance the throughput of cell edge users as well as to mitigate interference. Relay Nodes (RNs) have also proven useful toward the realization of LTE-A, in improving the signal quality for the cell edge users. In my thesis, I propose to combine JP-CoMP and relaying techniques for further improvements at the cell edge User equipment (UEs). The design exploits available RNs (fixed or mobile) in the cell coverage area, and allows them to participate in the coordination process with the base stations (BSs). To reduce the complexity burden, two BSs and two RNs are proposed to be used in the cooperating set, rather than three BSs as proposed in literature. Moreover, the optimal positions of the RNs were analyzed, and the maximum data rate was proven to be achieved at different cooperative RN locations, depending on the power ratio between the RN and the BS. The simulation results show that the proposed design improves capacity and bit error rate performance in comparison with conventional JP-CoMP. Finally, power allocation analysis was performed at the cooperating BSs and the cooperating RNs for the objective of maximizing the rate of the cell-edge UEs.