Method, user agent, application gateway and program for soft...

H - Electricity – 04 – L

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Details

H04L 29/08 (2006.01) H04L 12/66 (2006.01) H04L 29/06 (2006.01) H04M 3/58 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2515902

A method for soft handoff across different networks is disclosed. A first communication link (106, 1106) through a first network (104a, 1104a) is used for communicating between a first user agent (102a, 1102a) and a second user agent (102b, 1102b). The user agents negotiate to use a second communication link (108, 1108) for the same call. The second communication link is established through a second network (104b, 1104b) between the first user agent and the second user agent while maintaining the first communication link. Related data is sent through the first communication link and the second communication link such that the related data is for the same call. The first communication link is dropped and communication is continued using the second communication link. Alternatively, the second communication link is established between a third user agent (1102c) and the second user agent, for forwarding to another device.

La présente invention concerne un procédé de transfert intercellulaire sans coupure entre différents réseaux. Une première liaison de communication effectuée par l'intermédiaire d'un premier réseau est utilisée pur communiquer entre un premier agent utilisateur et un second agent utilisateur. Les agents utilisateurs négocient pour utiliser une seconde liaison de communication pour le même appel. La seconde liaison de communication est établie par l'intermédiaire d'un second réseau entre le premier agent utilisateur et le second agent utilisateur tandis qu'est maintenue la première liaison de communication. Les données associées sont envoyées par l'intermédiaire de la première liaison de communication et de la seconde liaison de communication de sorte que ces données associées soient destinées au même appel. La première liaison de communication est abandonnée et la communication continue au moyen de la seconde liaison de communication.

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