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 (M-LWDF) 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).