Title :
VoIP Capacity Analysis in Cognitive Radio System with Single/Multiple Channels
Author :
Wang, Zengguang ; Jiang, Tigang ; Jiang, Liqiang ; He, Xiangjun
Author_Institution :
Sch. of Commun. & Inf. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this letter, the voice over IP (VoIP) capacity in Cognitive Radio system is studied with single and multiple channels. A special Cognitive Radio (CR) system is used, the Cognitive radio system adopt the frequency of near 700 M Hz, a wireless channel can be modeled as a two-dimensional discrete-time Markov chain. The traffic of a single VoIP user is described as a Markov modulated Poison process (MMPP). Two kinds of systems is considered: single-channel system-in which VoIP data will be transmitted in a single channel; multi-channels system-VoIP data will be transmitted in several channels together, performance of both of the systems will be simulated in our CR system, and give a comparison. We obtained the packet dropping probability and the average throughput, after analysis these results, we give the conclusion.
Keywords :
Internet telephony; Markov processes; channel capacity; cognitive radio; probability; wireless channels; Markov modulated Poison process; VoIP; channel capacity; cognitive radio; discrete-time Markov chain; multi-channels system; packet dropping probability; single-channel system; voice over IP; wireless channel; Analytical models; Chromium; Cognitive radio; Markov processes; TV; Throughput;
Conference_Titel :
Wireless Communications Networking and Mobile Computing (WiCOM), 2010 6th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-3708-5
Electronic_ISBN :
978-1-4244-3709-2
DOI :
10.1109/WICOM.2010.5600795
