Downlink resource management for packet transmission in OFDM wireless - Communication systems

作者：Cai J^*; Shen XM; Mark JW

来源：IEEE Transactions on Wireless Communications, 2005, 4(4): 1688-1703.

DOI：10.1109/TWC.2005.850272

• generalized processor sharing
• multiuser diversity
• orthogonal frequency-division multiplexing
• power distribution
• subcarrier allocation
• wireless communications

In this paper, an optimal downlink resource management scheme for heterogeneous packet transmission in orthogonal frequency-division multiplexing (OFDM) wireless communication systems is proposed. By making use of the channel impulse response and the properties of the OFDM physical layer, a resource management scheme is developed by integrating power distribution, subcarrier allocation, and the generalized processor sharing (GPS) scheduling. The scheme can: 1) maximize system throughput; 2) guarantee the required signal-to-noise ratio for heterogeneous traffic; 3) provide fairness to all the traffic admitted in the system; and 4) satisfy the total transmission power constraint. For practical implementation, a simplified power and subcarrier allocation algorithm, a robust H-infinity channel estimation algorithm, and a truncated GPS (TGPS) scheduling scheme are introduced. Simulation results show that the proposed resource management scheme exhibits good throughput performance.

• 出版日期2005-7