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

Author

Cardenete-Suriol, M. ; Mangues-Bafalluy, Josep ; Portoles-Comeras, M. ; Requena-Esteso, M. ; Gorricho, M.

Author_Institution

Pare Mediterrani de la Tecnologia, Barcelona

fYear

2007

fDate

24-28 June 2007

Firstpage

1973

Lastpage

1978

Abstract

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.

Keywords

3G mobile communication; Internet telephony; cellular radio; signalling protocols; wireless LAN; GPRS-UMTS networks; SIP-based vertical handovers; VoIP; VoIP call quality; WLAN; cellular network; wireless overlay; 3G mobile communication; Delay; Ground penetrating radar; Land mobile radio cellular systems; Performance analysis; Radio access networks; Radio control; Telecommunications; Wireless LAN; Wireless application protocol;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2007. ICC '07. IEEE International Conference on

Conference_Location

Glasgow

Print_ISBN

1-4244-0353-7

Type

conf

DOI

10.1109/ICC.2007.328

Filename

4288999