QoS oriented heterogeneous traffic scheduling in LTE downlink

In this paper, Rate-Level-Based Scheduling (RLBS) Algorithm is proposed to support the heterogeneous traffic in downlink of Long Time Evolution (LTE) system. The proposed scheduling algorithm aims to minimize the packet loss ratio of real-time traffic while guaranteeing Quality of Service (QoS) requirements. We compares the performance of the proposed scheduling algorithm with Modified Largest Weighted Delay First (M-LWDF) algorithm, Exponential PF (EXP/PF) algorithm and Z-Based QoS Scheduler (ZBQoS) algorithm. Simulation shows that compared with other algorithms, the proposed scheduling algorithm can achieve a good tradeoff between satisfaction of QoS requirement and fairness, meanwhile, it can can satisfy the requirement of Guaranteed Bit Rate (GBR) traffic preferably and improve the Packet Loss Ratio (PLR) performance significantly.