Method, network and network entity for establishing a communication session to a user equipment roaming in IMS

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9794302
APP PUB NO 20150131526A1
SERIAL NO

14402045

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The invention relates to a method, network ad network entity for establishing a communication session between a calling subscriber residing in a first Visited IMS network and a called subscriber roaming in a second Visited IMS network. The method includes routing a first Invite request for the communication session via a media path extending from the first Visited IMS network via a Home IMS network of the called subscriber to the second Visited IMS network, and establishing the communication session. The method further includes inserting an additional IMS network entity, residing in the second Visited IMS network, in the part of the media path extending from the first Visited IMS network to the Home IMS network of the called subscriber and removing the Home IMS network of the called subscriber from the media path.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)STOCKHOLM12205

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Patent Info (Count) # Cites Year
 
TELIASONERA AB (1)
* 2010/0309,879 ROUTING IN COMMUNICATIONS SYSTEM 1 2009
 
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) (1)
* 2012/0307,813 Methods for Routing of Calls in Internet Protocol Multimedia Subsystem Centralized Services Networks and Related Gateway Mobile Switching Centres (GMSC) and Home Location Registers (HLR) 2 2011
 
BLACKBERRY LIMITED (1)
* 2012/0302,196 Routing of Messages for Mobile Communication Devices During Emergency Calls 11 2011
 
NOKIA TECHNOLOGIES OY (1)
2005/0058,125 IP-based services for circuit-switched networks 154 2004
* Cited By Examiner

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