Journal of Electrical Engineering : Volume 19 / 2019 - Edition : 1

QOS IMPROVEMENT FOR MULTI-MEDIA TRAFFIC, USING EDF -PSO - HYBRID SCHEDULER IN LAYER-2 OF 4G WIRELESS DOWNLINK

Authors:
Sentthil Vinayakam
A. Rajeswari
Domain:
building electrification
Abstract:
Downlink schedulers in 4G networks need to allocate bandwidth for inputs of multiple classes of service and meet individual classes QoS requirements, which is a complex work. Conventional scheduling algorithms have limitations in providing best solutions in such vast set of solutions possible in such complex conditions in which high speed multi-media wireless networks operate. Proposed scheme namely, EDF-PSO Hybrid scheduler is a dynamic, channel aware and QoS aware, time-domain downlink scheduler, designed to work on IEEE 802.16e and 802.16m standards at MAC level. The proposed three stage EDF-PSO Hybrid scheduler consists of 1st stage of modified-EDF, 2nd stage of multi-objective PSO and final EDF rounds in that order. The performance metrics of Goodput, Packet delay and Packet Deadline Miss Ratio for real-time and non-real time connections are compared with existing best of class MAC downlink schedulers. The proposed EDF-PSO Hybrid schduler out-performs the competing schedulers viz EDF, LWDF, FIFO and PSO comprehensively in the mentioned QoS performance metrics for both real and non-real time classes of service. It is able to maintain this best performance upto a traffic intensity of 0.9 and meet max packet deadline specifications excellently. This is simulated and tested for FDD mode of duplexing.
Download Article:
 
This article is written in Adobe PDF format ( .pdf file ).To view this article you need to download the file. Please rightclick on the link below and then select "Save target as" to download the file to your harddrive. Download Article
Jee homepage | Jee Archive | Hard Copy | Publishers | Contact