Abstract
Although different call admission control (CAC) schemes have been proposed for cellular-wireless local area network (WLAN) interworking systems, no studies consider mobile stations (MSs) only with a single interface (for either WLANs or cellular networks) and thus these MSs will experience higher call blocking and dropping probabilities. In this article, we propose a new CAC scheme that considers both the MSs with a single interface and with dual interfaces. By employing the concept of guard-bands, the proposed CAC scheme gives higher priority to MSs with a single interface than those with dual interfaces to accommodate more MSs. The call blocking and dropping probabilities are analyzed using Markov chains and how to determine appropriate guard bands for CAC is investigated through cost minimization problems. Analytical and simulation results demonstrate that the proposed scheme can achieve lower blocking probabilities compared with existing schemes that do not include single interface MSs.
Original language | English |
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Article number | 91 |
Journal | Eurasip Journal on Wireless Communications and Networking |
Volume | 2011 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2011 Dec 1 |
Keywords
- WLAN
- call admission control
- cellular
- heterogeneous mobile stations
- performance analysis
ASJC Scopus subject areas
- Signal Processing
- Computer Science Applications
- Computer Networks and Communications