Patent · US Active

Method for usage of VPLMN infrastructure by an HPLMN to terminate an IMS session set up for a roaming user

US9055397B2 · kind B2 · utility

0Cited by

1References

9Claims

0Family size

Assignee

DEUTSCHE TELEKOM AG · DE

Inventor

Thomas Dennert · Troisdorf, DE

Key dates

Filing date	Jun 7, 2011
Grant date	Jun 9, 2015
Priority date	—
Expiry date	Nov 4, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04W80/10
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A method for providing a roaming functionality related to an Internet Protocol Multimedia Subsystem (IMS) session includes: transmitting, by a second IMS domain, a session set-up request control signaling to a first IMS domain; transmitting, by the first IMS domain, the session set-up request control signaling in a forward direction to a Roaming Border Control Function (RBCF); and handling, by the second IMS domain, the user plane path and the associated control signaling to terminate the session set-up. Local break out of media is applied for the roaming first UE. The RBCF provides a linking of signaling received via a loop through the first IMS domain in the Home Public Land Mobile Network (HPLMN) with media anchored due to the local break out in the second IMS domain in the Visited Public Land Mobile Network (VPLMN).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.