Utility based QoS aware uplink scheduler scheme for LTE Small Cell Network

LTE uses the SC-FDMA radio access technology for its uplink data traffic transmission from the User Equipment (UE) to eNodeB. To the best of our knowledge the uplink MAC scheduling decisions at the eNodeB that have been proposed so far for Small Cell network are mostly based on single parameters like channel awareness, buffer status, or minimal power transmission. In this paper, we propose a novel algorithm to support Quality of Service (QoS) aware uplink scheduling and resource allocation scheme at the small cell eNodeB. The proposed scheme dynamically calculates user weights through utility functions considering the parameters like queuing delay and throughput and does resource allocation based on uplink channel condition as well as Hybrid Automatic Repeat Request (HARQ) retransmission status.. The proposed scheduler is referred to as UQUS (Utility based QoS Uplink Scheduler).The performance of the proposed algorithm is compared with traditional scheduling algorithms such as round robin (RR) and proportionate fairness (PF). The simulation results show that the proposed UQUS mechanism achieves minimum gain of 4 times the video cell throughput and minimum gain of 2 times voip cell throughput compared with RR and PF schedulers.