Priority-based Resource Allocation for RT and NRT Traf.cs in OFDMA Systems
In this paper, we address the problem of adaptive radio resource allocation and QoS provisioning for real-time (RT) and non-real-time (NRT) services in OFDMA systems. The proposed algorithm tightly couples the subchannel allocation and packet scheduling together through an integrated cross-layer approach in which each packet is assigned a priority value by taking both the instantaneous channel condition and the QoS requirements into account. An ef.cient suboptimal algorithm with low computational complexity is proposed to solve the linear optimization problem. Simulation results show that the proposed algorithm can greatly improve the system performance in terms of high spectral ef.ciency and low outage probability compared to the traditional TDMA algorithm, thus is very suitable for the downlink of current OFDMA systems.
Hua Wang
Department of Communications, Optics & Materials Technical University of Denmark, Lyngby, Denmark
国际会议
上海
英文
2007-09-21（万方平台首次上网日期，不代表论文的发表时间）