Title :
Multi-Phase Predictive Proportional Fairness Scheduling for a Multi-Channel Wireless Packet System
Author :
Min, Tae-Young ; Kang, Chung G.
Author_Institution :
Korea Univ., Seoul
Abstract :
In this paper, we propose a practically realizable version of a proportional fairness scheduling algorithm that is applicable to emerging broadband wireless access systems with multiple channels, whose individual channel quality vary for every user, e.g., as in the band AMC (adaptive modulation and coding) mode of a subcarrier allocation in an OFDMA (orthogonal frequency division multiplexing) system. In order to circumvent the complexity of the optimal multi-channel PF algorithm (which grows exponentially with the number of channels), we introduce the notion of the multiphase predictive approach which takes the channel conditions over the multiple slots into account, as opposed to the conventional multichannel PF scheduling algorithm which deals with the channels in each time slot. When a simple channel-by-channel scheduling algorithm is implemented with the proposed approach, it has been shown that the network utilization with respect to proportional fairness can be further improved over the conventional multichannel PF scheduling algorithm while resorting to much less complexity. We also present specific examples of implementation for the proposed approaches, along with their performance.
Keywords :
OFDM modulation; adaptive codes; adaptive modulation; broadband networks; channel allocation; modulation coding; multi-access systems; packet radio networks; radio access networks; AMC; OFDMA; adaptive modulation and coding; broadband wireless access systems; multichannel wireless packet system; multiphase predictive proportional fairness scheduling; multiple channels; orthogonal frequency division multiplexing system; subcarrier allocation; Degradation; Frequency domain analysis; IP networks; Land mobile radio; Mobile communication; Modulation coding; OFDM; Quality of service; Scheduling algorithm; Web and internet services;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2007. PIMRC 2007. IEEE 18th International Symposium on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-1144-3
Electronic_ISBN :
978-1-4244-1144-3
DOI :
10.1109/PIMRC.2007.4394089