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Journal Article
Design and Analysis of an Adaptive Guard Channel Based CAC Scheme in a 3G-WLAN Integrated Network
- Authors
- Jae Man Park, Gang Uk Hwang, Boo Geum Jung
- Issue Date
- 2010-08
- Citation
- Journal of Industrial and Management Optimization, v.6 no.3, pp.621-639
- ISSN
- 1547-5816
- Publisher
- American Institute of Mathematical Sciences
- Language
- English
- Type
- Journal Article
- Project Code
- 10MI2600, Development of Next Generation Fixed Mobile Convergence Gateway Technology, Byungjun Ahn
- Abstract
- In wireless networks, guard channel based Call Admission Control (CAC) schemes are widely used to protect handoff calls for seamless wireless services. However, the introduction of guard channels in wireless networks results in the increase in the new call blocking probability. This general sit-uation also occurs in a 3G-WLAN integrated network. To solve this problem in a 3G-WLAN integrated network for QoS support, we propose an adaptive guard channel based CAC scheme in this paper. The main objective of our guard channel based CAC scheme is to alleviate the increase in the new call blocking probability due to guard channels while it can still protect handoff calls. For the design of our adaptive guard channel based CAC scheme, we first develop and analyze a performance model for a general guard channel based CAC scheme based on a level-dependent quasi birth and death model. The analytic results are used to design our adaptive guard channel based CAC scheme. Numerical studies show that our adaptive guard channel based CAC scheme can achieve its objective and its performance is near optimal.
- KSP Keywords
- Admission control(AC), Blocking probability(BP), Call Admission Control, Guard channel, Handoff call, New call blocking probability, QoS Support, Wireless network, design and analysis, integrated network, near optimal