Performance evaluation of cross layer QoS scheduling for Long Term Evolution Network
- D. Vinayagam, R. Kurinjimalar, D. Srinivasan
- International Journal of Advanced Computer…
The proposed algorithm prolongs the scheduler from scheduling the Real Time (RT) and Non Real Time (NRT) services based upon their priority required on Quality of Service (QoS). The proposed Cross QoS Scheduling Algorithm (XQSA) is capable of scheduling data, video and voice services over the same wireless channel. The complimentary advantages of both RT (video & voice) and NRT (Best Effort of service, BE) services and cross layering technology is utilized by XQSA which prioritizing services in the scheduler to achieve a significant cell user throughput, a low delay, normalized fairness and a low packet loss ratio. The XQSA adapted the two different scheduling principles together to govern the effective channel utilization. The simulation of the XQSA under multiple cell scenarios for scheduling in the 3.9G LTE (Long Term Evolution) network is done using LTE-Sim tool. In the XQSA policy, the traditional RT and NRT scheduling algorithm are integrated together to support the multi-service scheduling (i.e., Modified Long Weighted Delay First/Proportional Fair (M_LWDF/PF) & Exponential Proportional Fair/Proportional Fair (EXP_PF/PF)). The study analysis of the XQSA is examined experimentally through simulation in terms of throughput, packet loss ratio, delay and cell spectral efficiency and fairness index. The simulation based comparison indicates that M_LWDF/PF and EXP_PF/PF scheduler outperforms PF scheduler especially during RT service. The PF scheduler has high throughput for the NRT service. In all the simulations, the performance level of EXP_PF/PF scheduling algorithm for multi-service scheduling seems to be an optimal solution for guaranteeing required QoS (Quality of Service).