QoS-Based Power-Efficient Resource Management for LTE-A Networks with Relay Nodes

This paper investigates the resource management problem in the relay-enhanced long term evolution advanced (LTE-A) systems. The challenges of this resource allocation problem arise from the complication of assigning transmission links to the multicast broadcast single frequency network (MBSFN) subframe within the numerous physical resource block (PRB) pair. Existing research work does not fully consider all the influential factors to achieve power efficiency for the LTE-A networks. In this paper, a power-efficient QoS-based resource management (PERM) scheme is proposed to allocate MBSFN subframes, PRB pairs, and transmission power. The proposed PERM scheme is targeting at power efficiency with the consideration of both QoS requirements of user equipment (UE) and direct/two-hop communications. Moreover, the heuristic PERM (H-PERM) scheme is designed to provide efficient resource allocation for the LTE-A systems compared to the original PERM scheme. Simulation results show that the proposed schemes can provide power efficiency with consideration of UE’s QoS requirements for the LTE-A systems.