减少上行CQI反馈的OFDIVIA系统资源分配

蒋樟琳, 张中兆, 沙学军, 孙丽楠

哈尔滨工业大学电子与信息工程学院，150080哈尔滨



摘要:

针对目前OFDMA系统上行信道信息的反馈量大和公平性欠佳的问题，提出了减少上行反馈的资源分配算法，该算法在高信噪比下，小区中心的用户不需要反馈CQI，而在低信噪比的小区边缘，当用户量小时，采用1B反馈，当用户量大时，采用基于门限的Best-M反馈方案．同时，根据Best-M反馈方案，提出了对第1个用户优先选择方案．本文算法在保证资源分配必要的反馈信息的前提下，对复杂度和性能之间进了折中，同时满足了用户之间资源分配的公平性

关键词:  OFDMA  信道状态信息  反馈  注水

DOI：10.11918/j.issn.0367-6234.2012.05.007

分类号:TN929.5

基金项目:围家重点基础研究发展计划资助项目( 2007CB310601)



Resource allocation with reducing uplink CQI feedback in OFDMA

JIANG Wei-lin, ZHANG Zhong-zhao, SHA Xue-jun, SUN Li-nan

Abstract:

According to the features that uplink CQI feedback is high and not fair enough in OFDMA system,the reducing feedback resource allocation algorithm is proposed. Users in the cell center with higher SNR donot need feedback CQI, and users in the cell edge with lower SNR adopt l B feedback when the load is lowwhile the Best-M is adopted and the load is heavy. Meanwhile, according to the Best-M project, the first userpreference is proposed. On the premise of ensuring the necessary feedback information of resource allocation,the proposed algorithm trades off between complexity and performance, and meets the users' fairness

Key words:  OFDMA  channel quality information  feedback  waterfilling