Paper Info
Title
Cross-Layer QoS Scheduling for Layered Multicast Streaming in OFDMA Wireless Networks
Abstract
The conventional multicast scheme of wireless networks, though establishing a bandwidth-saving means for point-to-multipoint transmission, is very conservative by limiting the throughput of short-range communications. The multicast performance can be significantly improved if some low-rate users are pruned. In this paper, we investigate the subchannel assignment mechanism of multicast streaming services in the emerging WiMax/802.16e systems, where each multimedia stream is composed of a basic layer and an enhancement layer. The former affords a low-resolution video image to all the subscribers, while the latter only serves those with preferable channel states. Optimization frameworks are formulated to characterize the QoS requirements of multicast flows: pruned proportional rate ratio (PPRR), pruned stream rate guarantee (PSRG) and pruned user proportional fairness (PUPF). Three cross-layer algorithms are presented to perform channel assignment for different QoS requirements. Analytical study shows that the proposed algorithms have polynomial-time computational complexity. Numerical experiments validate that our proposals significantly outperform the conventional peer schedulers in terms of system throughput.
Year
DOI
Venue
2009
10.1007/s11277-009-9754-8
Wireless Personal Communications
Keywords
Field
DocType
Multicast,Scheduling,OFDMA,QoS guarantee,Subchannel assignment,Cross-layer design
Protocol Independent Multicast,Source-specific multicast,Wireless network,Computer science,Xcast,Quality of service,Computer network,Pragmatic General Multicast,Multicast,Throughput
Journal
Volume
Issue
ISSN
51
3
0929-6212
Citations 
PageRank 
References 
5
0.52
14
Authors
3
Name
Order
Citations
PageRank
Yuedong Xu123130.59
Xiaoxin Wu247538.35
John C.S. Lui33680279.85