VoIP Performance in SIP-Based Vertical Handovers Between WLAN and GPRS/UMTS Networks

This paper experimentally analyzes the handover performance of VoIP sessions in a wireless overlay of 802.11 WLANs and GPRS/UMTS networks when mobility is handled at the application layer by SIP. It also assesses the impact of handovers on the VoIP call quality perceived by the user by means of the...

Full description

Saved in:
Bibliographic Details
Main Authors: Cardenete-Suriol, M., Mangues-Bafalluy, J., Portoles-Comeras, M., Requena-Esteso, M., Gorricho, M.
Format: Conference Proceeding
Language:English
Subjects:
3G mobile communication
Delay
Ground penetrating radar
Land mobile radio cellular systems
Performance analysis
Radio access networks
Radio control
Telecommunications
Wireless application protocol
Wireless LAN
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper experimentally analyzes the handover performance of VoIP sessions in a wireless overlay of 802.11 WLANs and GPRS/UMTS networks when mobility is handled at the application layer by SIP. It also assesses the impact of handovers on the VoIP call quality perceived by the user by means of the extended E-model. The study reveals that good performance values are achieved when handing over from GPRS/UMTS to WLAN. Additionally, acceptable quality is obtained for handovers from WLAN towards UMTS. On the other hand, unacceptable values are achieved when moving towards GPRS. The main reason is the delay experienced by SIP messages when traversing the cellular network.
ISSN:1550-3607
1938-1883
DOI:10.1109/ICC.2007.328