Throughput gain by hybrid TDM/FDM & spatial reuse of resources among nodes and links for inband relaying

Abstract

In LTE-A networks, relaying is a cost-effective solution to improve the capacity and enhance the coverage. However, in order to fully exploit the benefits of relaying, inter-cell interference coordination (ICIC) and resource sharing among different nodes and links need to be addressed. This paper focuses on Type 1 half-duplex inband relaying. Several strategies related to resource partition and frequency reuse between nodes and links are proposed for both access and backhaul subframes, under modified SFR-based resource sharing scheme for macro-ICIC. We also propose a way to multiplex the transmissions addressed to several RNs with the aim of improving the resource allocation. These proposals are compared for various relay deployments, taking into account the real impact of the capacity of backhaul links on system performance. Moreover, relay cell range expansion with several bias offsets is analyzed.