T-mobile Usa, Inc.

Sasikala Mannepally

Shujaur Rehman Mufti

Khurram Ahmad Mirza

Babak Namiranian

Nilesh Ranjan

Policy node grouping provides efficient network operation by improving the speed and reliability of policy node traffic. Disclosed solutions include: receiving, at a proxy-call session control function (P-CSCF), from a user equipment (UE), a data traffic session request; based on at least the data traffic session request and group policy criteria, selecting a policy node group from among a plurality of policy node groups, the plurality of policy node groups each comprising policy node peers grouped by a service type; based on at least the selected policy node group, determining a selected policy node; based on at least the selected policy node and the data traffic session request, establishing a data traffic session for the UE; and based on at least meeting policy node failover criteria and a failover latency timer, performing an inter-group or intra-group failover according to the group policy criteria.

Policy node grouping for efficient network operation

A system and method to assist in establishing a communication session to a mobile device having a registered IMS session in a visited network, or having both a registered IMS session and a circuit-switched session in a visited network. When a mobile device establishes an IMS session with an application service in a visited network, the address of the application service and the identity of the mobile device is transmitted to the Home Location Register (HLR) and/or Home Subscriber Server (HSS) associated with the mobile device. The HLR or HSS stores the address of the application service in conjunction with the identity of the mobile device. When requests to establish a communication session with the mobile device are made, the HLR or HSS provides the address of the application service that is associated with the mobile device in the visited network to allow a communication session to be established.

System and method for terminating communication sessions with roaming mobile devices

A device associated with a subscriber database of a telecommunication network described herein is configured to receive a Send Routing Information for Short Message (SRI-SM) message from a messaging center. The device then determines whether a user device specified by the SRI-SM message is associated with an Internet Protocol (IP) Multimedia Subsystem (IMS) registration. In response to determining that the user device is associated with an IMS registration, the device sends the SRI-SM message to an IP Short Message Gateway (IP-SM-GW). In response to determining that the user device is not associated with an IMS registration, the device processes the SRI-SM message and responds to the messaging center based on the processing.

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Bothell, WA, United States of America

Sasikala Mannepally