Title: Performance evaluation of downlink packet scheduling for real time traffic in LTE system

Authors: S. Fouziya Sulthana; R. Nakkeeran

Addresses: Department of Electronics Engineering, School of Engineering and Technology, Pondicherry University, Puducherry-605014, India ' Department of Electronics Engineering, School of Engineering and Technology, Pondicherry University, Puducherry-605014, India

Abstract: Long-term evolution (LTE) is one of the promising broadband wireless technologies developed by third generation partnership project (3GPP) to support higher data rate. Packet scheduling is one of the open issues in deciding the overall system performance. In this paper, a new scheduling scheme is proposed that is suitable for real time services. In this method, two metrics are estimated for the packets based on the type of bearers. T_max is calculated for guaranteed bit rate (GBR) bearers and T_min is calculated for non-GBR bearers. The main objective is to allocate first all GBR bearers because of their highest quality-of service (QoS) requirements. After the resource allocation of GBR bearers, if the current transit time interval (TTI) has more resources, then the packets of non-GBR bearers are entertained. The proposed scheme is compared with traditional scheduling algorithms and validated by means of simulation results.

Keywords: long-term evolution; LTE; third generation partnership project; 3GPP; GBR bearer; guaranteed bit rate; Tmax list; Tmin list; goodput; packet delay; packet loss rate; PLR; fairness index; resource allocation; packet scheduling; performance evaluation; quality of service; QoS; simulation.

DOI: 10.1504/IJICT.2017.083261

International Journal of Information and Communication Technology, 2017 Vol.10 No.3, pp.263 - 275

Received: 26 Nov 2014
Accepted: 17 Feb 2015
Published online: 23 Mar 2017 *

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