DocumentCode :
2536347
Title :
Joint opportunistic spectrum access and scheduling for layered multicasting over cognitive radio networks
Author :
Polacek, Pavol ; Yang, Ting-Yeu ; Huang, Chih-Wei
Author_Institution :
Dept. of Commun. Eng., Nat. Central Univ., Jhongli, Taiwan
fYear :
2011
fDate :
17-19 Oct. 2011
Firstpage :
1
Lastpage :
6
Abstract :
Cognitive radio (CR) represents an exciting new paradigm on spectrum utilization and potentially more bandwidth for exploding multimedia traffic. We focus on the layer encoded video multicast problem over CR and contribute 1) a quality based ranking in opportunistic spectrum access (OSA) for sub-channel selection, and 2) opportunistic layered multicasting (OLM) inspired scheduling designed particularly for CR networks. The 2-step ranking in OSA takes outcomes of periodic sensing and prediction to expand the system-wide throughput while keeping collision rates acceptable. By tracking group receiving rate across CR sub-channels and data expiration time, we are able to realize the OLM advantage under much more challenging CR environments. The overall joint opportunistic spectrum access and scheduling (OSAS) algorithm finds precise transmission parameters to heuristically reach maximum system utility. Favorable results comparing OSAS with not fully opportunistic methods demonstrate OSAS to be the best performing one.
Keywords :
cognitive radio; encoding; multicast communication; radio networks; scheduling; telecommunication traffic; 2-step ranking; cognitive radio networks; collision rates; group receiving rate; layer encoded video multicast problem; multimedia traffic; opportunistic layered multicasting; opportunistic spectrum access; periodic sensing; scheduling; spectrum utilization; subchannel selection; Forward error correction; Joints; Multimedia communication; Sensors; Streaming media; Throughput; Tiles;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Multimedia Signal Processing (MMSP), 2011 IEEE 13th International Workshop on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4577-1432-0
Electronic_ISBN :
978-1-4577-1433-7
Type :
conf
DOI :
10.1109/MMSP.2011.6093836
Filename :
6093836
Link To Document :
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