Effective Capacity Region in a Wireless Multiuser OFDMA Network
The wireless multiuser Orthogonal Frequency Division Multiple Access (OFDMA) network in the fading channels with statistical Quality of Service (QoS) requirements is studied in this paper. Considering the statistical QoS requirement as a system performance metric, the concept of the effective capacity is introduced and the effective capacity region is characterized for a wireless multiuser OFDMA network. And then, they prove that the effective capacity region is convex. Moreover, the asymptotically optimal sub-carrier and power allocation scheme which achieves the boundary points of the effective capacity region is proposed. Simulation results about the effective capacity region with two and three mobile stations under homogeneous and heterogeneous QoS constraints are given.