Chunk-based subcarrier assignment with power allocation and rate constraints for downlink OFDMA

We consider a downlink OFDMA in which users may have different rate requirements and a base station would like to maximize user rate over subcarrier assignment (SA) and power allocation (PA). To attain that objective, we propose suboptimal chunk-based SA and PA algorithms that are less complex and perform better than existing suboptimal schemes. Numerical results show that in certain example the proposed SA and PA can provide user rate up to 98.6% of the optimum rate obtained from a joint SA and PA problem.

[1]  Jeffrey G. Andrews,et al.  Adaptive resource allocation in multiuser OFDM systems with proportional rate constraints , 2005, IEEE Transactions on Wireless Communications.

[2]  Jiangzhou Wang,et al.  Chunk-based resource allocation in OFDMA systems - part I: chunk allocation , 2009, IEEE Transactions on Communications.

[3]  Jiangzhou Wang,et al.  Chunk-Based Resource Allocation in OFDMA Systems—Part II: Joint Chunk, Power and Bit Allocation , 2012, IEEE Transactions on Communications.

[4]  L.J. Cimini,et al.  A simplified opportunistic feedback and scheduling scheme for OFDM , 2004, 2004 IEEE 59th Vehicular Technology Conference. VTC 2004-Spring (IEEE Cat. No.04CH37514).

[5]  Bo Hu,et al.  Proportional Resource Allocation with Subcarrier Grouping in OFDM Wireless Systems , 2013, IEEE Communications Letters.

[6]  Kwang Bok Lee,et al.  Transmit power adaptation for multiuser OFDM systems , 2003, IEEE J. Sel. Areas Commun..

[7]  John M. Cioffi,et al.  Increase in capacity of multiuser OFDM system using dynamic subchannel allocation , 2000, VTC2000-Spring. 2000 IEEE 51st Vehicular Technology Conference Proceedings (Cat. No.00CH37026).