METHODS AND SYSTEM FOR PROVIDING VOICE CALL CONTINUITY TAKING ADVANTAGE OF RANAP DIRECTED RETRY

A method and system for providing circuit-switched to IP Multimedia Subsystem voice call continuity with a single radio are provided. The exemplary embodiment takes advantage of a standard RANAP signaling procedure called 'directed retry' to perform a much better coordination between the c...

Full description

Saved in:
Bibliographic Details
Main Author EJZAK, RICHARD, PAUL
Format Patent
LanguageEnglish
French
Published 20.08.2009
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
WIRELESS COMMUNICATIONS NETWORKS
Online AccessGet full text

Cover

More Information
Summary:A method and system for providing circuit-switched to IP Multimedia Subsystem voice call continuity with a single radio are provided. The exemplary embodiment takes advantage of a standard RANAP signaling procedure called 'directed retry' to perform a much better coordination between the change in radio mode and the transfer of the media path. With the use of 'directed retry', the transfer of the media path does not begin until the handover procedure is complete, thus significantly reducing the likely amount of media disruption. L'invention concerne un procédé et un système de fourniture d'une commutation de circuit à une continuité d'appel vocal d'un sous-système multimédia IP à l'aide d'une seule radio. Le mode de réalisation exemplaire de l'invention tire parti d'une procédure normale de signalisation RANAP appelée 'retransmission dirigée' pour obtenir une bien meilleure coordination entre le changement de mode radio et le transfert du trajet des supports. Grâce à la 'retransmission dirigée', le transfert du trajet des supports ne commence pas tant que la procédure de transfert n'est pas terminée, ce qui réduit considérablement le nombre probable de perturbations des supports.
Bibliography:Application Number: WO2008US11069