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Markov CAC model in Wireless Mobile Networks Using AMC  

Kwon Eun-Hyun (연세대학교 전기전자공학부)
Park Hyo-Soon (삼성전자)
Lee Jai-Yong (연세대학교 전기전자공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.4B, 2006 , pp. 270-277 More about this Journal
Abstract
In the wireless adaptive modulation and coding(AMC) systems, the modulation type of user's connection can be changed dynamically. and the ongoing connection might fail due to the change of modulation. In this paper, we approach the AMC-induced CAC problem by focusing on the guaranteed connection. Three kinds of calls, new, handoff, and modulation-changed calls, are considered. We propose a modified guard channel CAC scheme that allows the modulation-changed and handoff calls to use the guard channel. Then we analyze a Markov model for the CAC scheme with long-term AMC in mind. According to the simulation results, the proposed approach reduces the call dropping probability for modulation-changed calls, which suggests the threshold of guard channels can be determined based on the proposed approach.
Keywords
call admission control; adaptive modulation and coding; wireless network;
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