DocumentCode :
3567975
Title :
Impact of the primary resource occupancy information on the performance of cognitive radio networks with VoIP traffic
Author :
Castellanos-Lopez, S. Lirio ; Cruz-P?©rez, Felipe A. ; Rivero-Angeles, Mario E. ; Hernandez-Valdez, Genaro
Author_Institution :
Electr. Eng. Dept., CINVESTAV-IPN, Mexico City, Mexico
fYear :
2012
Firstpage :
338
Lastpage :
343
Abstract :
In this paper, the relevance of considering the primary network resource occupancy information on the admission criterion of new secondary VoIP sessions in cognitive radio networks (CRNs) is investigated. In particular, the performance of two different call admission control (CAC) strategies whose admission criterion is based either on the total number of primary and secondary sessions or only on the number of sessions of secondary users is compared. System performance is evaluated in terms of the most relevant quality of service metrics for VoIP traffic at both call and packet level. Numerical results clearly show that including primary resource occupancy information on the CAC strategy is an effective mean to improve system performance, especially for low to moderate traffic loads. For instance, assuming that voice toll quality is required, packet dropping probability is reduced more than 30% when primary resource occupancy information is additionally used on the CAC strategy.
Keywords :
Internet telephony; cognitive radio; probability; quality of service; telecommunication congestion control; CAC strategies; CRN; VoIP traffic; admission criterion; call admission control strategies; cognitive radio networks; packet dropping probability; primary network resource occupancy information; primary session; quality of service; secondary VoIP sessions; secondary session; voice toll quality; Analytical models; Cognitive radio; Delay; Markov processes; Quality of service; System performance; Telecommunication traffic; AMC; Cognitive radio networks; VoIP; call admission control; joint call and packet level teletraffic analysis; on/off traffic; packet buffering; time-scale decomposition;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Cognitive Radio Oriented Wireless Networks and Communications (CROWNCOM), 2012 7th International ICST Conference on
ISSN :
2166-5370
Print_ISBN :
978-1-4673-2976-7
Electronic_ISBN :
2166-5370
Type :
conf
Filename :
6333764
Link To Document :
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