Wireless Internet. 6th International ICST Conference, WICON 2011, Xi’an, China, October 19-21, 2011, Revised Selected Papers

Research Article

Optimal Joint Subcarrier Assignment and Power Allocation for Multi-user Video Streaming over OFDMA Downlink Systems

Download30 downloads
  • @INPROCEEDINGS{10.1007/978-3-642-30493-4_1,
        author={Fan Li and Pinyi Ren and Qinghe Du},
        title={Optimal Joint Subcarrier Assignment and Power Allocation for Multi-user Video Streaming over OFDMA Downlink Systems},
        proceedings={Wireless Internet. 6th International ICST Conference, WICON 2011, Xi’an, China, October 19-21, 2011, Revised Selected Papers},
        proceedings_a={WICON},
        year={2012},
        month={10},
        keywords={resource allocation OFDMA multi-user optimization lagrange dual decomposition},
        doi={10.1007/978-3-642-30493-4_1}
    }
    
  • Fan Li
    Pinyi Ren
    Qinghe Du
    Year: 2012
    Optimal Joint Subcarrier Assignment and Power Allocation for Multi-user Video Streaming over OFDMA Downlink Systems
    WICON
    Springer
    DOI: 10.1007/978-3-642-30493-4_1
Fan Li1,*, Pinyi Ren1,*, Qinghe Du1,*
  • 1: Xi’an Jiaotong University
*Contact email: lifan@mail.xjtu.edu.cn, pyren@mail.xjtu.edu.cn, duqinghe@mail.xjtu.edu.cn

Abstract

In this paper, we present a cross-layer design for multi-user video streaming over OFDMA (orthogonal frequency-division multiple-access) downlink systems, based on the joint optimization of subcarrier assignment and power allocation. The objective is to maximize the received video quality of all the users subject to the network resource constraint. With the optimal joint subcarrier assignment and power allocation, the proposed scheme can maximally satisfy the requirements of the packet scheduling from the higher layer. Employing the Lagrange dual decomposition method, we can obtain the global optimal solution to the optimization problem. Simulation results show that the proposed algorithm has superior performance compared to the existing alternatives.