A Novel Scheduling Framework for QoS-Aware OFDMA Resource Allocation in a Network with Small Relay Cells and Macro Users
Relaying is a convenient way to provide full coverage in cellular networks. In particular, small relay cells can be used as a cost-effective solution for indoor coverage in MIMO-OFDM systems. The small relay cells would need to cater for indoor users' Quality of Service (QoS) expectations. One key QoS objective is delivering stable data rates for multimedia applications, which the authors refer to as guaranteed data rates. In this paper, they consider optimization for delivering guaranteed data rates in a network with multiple relays and a macro base station, in a scenario when there are both macro users and relay users to be served. A novel scheme called cell-guaranteed bit rate by relay scheduling is proposed, with both optimal and heuristic scheduling methods.