Performance Evaluation of Cross Layer QoS scheduling for Long Term Evolution Network

The Cross layer based Two-way scheduling Algorithm (CTSA) is proposed for scheduling both Real Time (RT) and Non-Real Time (NRT) services. The advantage of the complimentary characteristics of both RT and NRT services is utilized in CTSA to achieve a significant cell user throughput, a low delay, normalized fairness and a low packet loss ratio. The CTSA is the adaptation of the two scheduling algorithm supporting RT and NRT for effective utilization of channel. The LTE-Sim simulation tool is used to simulate the CTSA under multi-cell scenario environment for scheduling in the LTE (Long Term Evolution) network. The performances of the CTSA using Proportional Fair (PF), Modified Long Weighted Delay First (MLWDF) and Exponential Proportional Fair (EXP/PF) schedulers are studied in terms of throughput, packet loss ratio, delay and cell spectral efficiency and fairness index. The simulation based comparison indicates that M-LWDF and EXP/PF scheduler outperforms PF scheduler especially during RT service. The PF scheduler has high throughput for NRT service. In all the simulations, the performance level of EXP/PF scheduling algorithm for multi-service scheduling seems to be an optimal solution for guaranteeing required QoS (Quality of Service).