Investigation on resource selection scheme based on proportional fair criteria

In order to support the rapid increase of mobile traffic, network densification in addition to utilization of high frequency spectrum such as millimeter-wave frequency bands are envisioned as key enablers. In such situations, the amount of resources available to users increases. This paper investigates the resource selection scheme based on the proportional fair (PF) criteria. It is proved that two resources are selected for at most two users, and only one of the resources is selected for other users, which is determined by the average achievable data rate of three resources, when the number of resources M = 3. This indicates that only one out of three resources is assigned to most users to achieve PF criteria. Therefore, the proposed scheme can effectively reduce the amount of channel quality indicator (CQI) feedback required at the subsequent PF-based packet scheduling, since CQI in the one out of three resource is only required. Although the algorithm and its proof is only limited to M = 3, the proposed algorithm can be easily extended to general number of resources.