Urgency and efficiency based wireless downlink packet scheduling algorithm in OFDMA system

Abstract

In this paper, we exploit how to provide quality of service at downlink in the OFDMA wireless communication systems. OFDMA, also referred to as multiuser-OFDM, is considered as strong candidate wireless system for the next generation communications. Since there will be a variety of traffic for real-time and non-real-time traffics in the next generation bile communications, especially at the downlink from a base station, scheduling of such downlink traffic packets is expected to a key function for QoS provisioning to users. One such algorithm designed not only to support multiple users simultaneously but also to offer real-time and non-real-time services to a user at the same time is the urgency and efficiency based scheduling (UEPS) algorithm [1]. The UEPS algorithm uses time-utility function as a scheduling urgency factor and the relative status of the current channel to the average one as an efficiency indicator of radio resource usage. The design goal to maximize throughput of non-real-time traffics with satisfying QoS requirements of real-time traffics.