In an integrated WLAN and cellular network, if all mobile users whose connections originate in the cellular network migrate to the WLAN whenever they enter the double coverage area, the WLAN will be severely congested and its users will suffer from performance degradation. Therefore, we propose a Call Admission Control (CAC) algorithm that allows the WLAN to limit downward Vertical Handovers (VHOs) from the cellular network to reduce unnecessary VHO processing. Numerical and simulation results demonstrate that our CAC scheme reduces the unnecessary VHO processing while keeping the DVHO blocking rate within acceptable limits and maintaining reasonable throughput in the WLAN.
Bibliographical noteFunding Information:
This work was supported in part by the IT R&D program of MKE/IITA [2007-F-038-02, Fundamental Technologies for the Future Internet] and Information Technology Research Center (ITRC) support program supervised by the MKE/IITA (IITA-2008-C1090-0803-0002), Korea. It was also supported in part by the NIST/Office of Law Enforcement Standards (OLES).
All Science Journal Classification (ASJC) codes
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics