主催: システム制御情報学会, 計測自動制御学会, 日本機械学会, 精密工学会, 日本航空宇宙学会, 化学工学会
共催: 48の学会，協会などから協賛
In this work, we focus on the problem of Channel State Information (CSI) feedback by Uplink (UL) Random Access (RA) in an Orthogonal Frequency Division Multiple Access (OFDMA) system. We introduce the concept of variable collision protection, where the probability that a feedback information experiences a collision depends on its importance. By partitioning the CSI into orthogonal layers of priority, and by allocating different numbers of RA slots to each layer, this scheme ensures that the feedback success probability is higher for the CSI with better quality, as it is more likely to be used by the scheduler. Analytical and simulation results show that our proposed scheme provides an excellent trade-off between system performance and the amount of feedback overhead.
