In mobile voice over IP (VoIP) systems, user mobility leads to the increased call setup latency to find out the current location of user, which has a negative impact on users call quality. In this letter, we propose a prefetching technique for user location to reduce the call setup latency. We develop an analytical model and investigate the impacts of mobility parameters and thresholds.
Bibliographical noteFunding Information:
This work was supported in part by the KCC under the R&D program supervised by the KCA (KCA-2011-10913-0500); by MKE under the ITRC program supervised by the NIPA (NIPA-2011-C1090-1011-0004); by NRF grant (2009-0064397); by WCU Project (R33-2008-000-10044-0); and by KRF grant (KRF-2008-314-D00354).
- Mobile VoIP
- location management
ASJC Scopus subject areas
- Modelling and Simulation
- Computer Science Applications
- Electrical and Electronic Engineering