减少上行CQI反馈的OFDMA系统资源分配

Resource allocation with reducing uplink CQI feedback in OFDMA

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1 B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.

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 do not need feedback CQI,and users in the cell edge with lower SNR adopt 1 B feedback when the load is low while the Best-M is adopted and the load is heavy.Meanwhile,according to the Best-M project,the first user preference 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.