Oceus Networks Inc.

Telefonaktiebolaget Lm Ericsson (publ)

Kevin Dean Stiles

Vincent Charles Graffagnino

Serdar Sahin

Todd A Pressley

Todd Presley

A mobile device can receive information blocks from one or more base stations, which can be emitted by the base stations within a particular radio band. The mobile device can identify base stations in an exclusivity state. The mobile device can establish a communication link with one of the base stations in the exclusivity state. In some cases, the mobile device can establish a communication link with the base stations that is in an exclusivity state and that matches a cell identifier stored on the mobile device.

Targeted user equipment-base station communication link

A system and method for enabling a UE to roam to a visited IMS-based network from a home network that does not have an IMS infrastructure. A visiting UE sends to an Intelligent Roaming Application Server (I-RAS) in the visited network, a first SIP Registration message that includes a SIP URI identifying the UE as a visitor from a home network that does not have an IMS infrastructure. The I-RAS rejects the registration, but includes a temporary Tel URI in the rejection message. The UE sends a second Registration message using the temporary Tel URI, which is forwarded to a Visited S-CSCF for authentication. The S-CSCF returns authentication vectors, which the UE uses to compute ciphering parameters and establish an IPSEC connection with a Visited P-CSCF. The UE then sends a third Registration message, which is accepted, and registration in the visited network is complete. The I-RAS acts as a pseudo Visited MSC/VLR and performs an update location procedure with the visiting UE's home network.

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Allen, TX, United States of America

Kevin Dean Stiles