Open AccessEnhanced Uplink Scheduling for Continuous Connectivity in High Speed Packet Access Systems
Author(s) -
Saied M. Abd El-atty,
Konstantinos A. Lizos
Publication year - 2012
Publication title -
international journal of communications, network and system sciences/international journal of communications, network, and system sciences
Language(s) - English
Resource type - Journals
eISSN - 1913-3723
pISSN - 1913-3715
DOI - 10.4236/ijcns.2012.58055
Subject(s) - computer science , computer network , telecommunications link , network packet , scheduling (production processes) , user equipment , quality of service , real time computing , base station , engineering , operations management
The efficiency of high speed packet access (HSPA) systems is mainly based on channel quality information (CQI) reports transmitted by user equipment (UE) to Node B. In this paper, we propose an improved CQI prediction scheme based on a finite state Markov chain (FSMC) model for wireless channel, in order to reduce CQI signaling overhead in the HSPA system. Then, we introduce an enhanced uplink packet scheduling (EUPS) scheme to provide quality of services (QoS) guaranteed for continuous packet connectivity in the enhanced uplink (EUL). EUPS serves the active UEs not only according to buffer status but also according to reported state of the wireless channel of each UE. The performance of the proposed scheme in terms of average packet delay, average packet drop and average cell throughput is compared to the classical scheduler of 3GPP standards. The simulation results show the effectiveness of the proposed scheme