T-mobile Usa, Inc.

T-mobile Innovations LLC

Kunal Prakash Barawkar

Romil Sood

Karunakalage Viraj Rakitha Silva

Jun Liu

Alan Denis MacDonald

Christopher Harvey Joul

Salvador Mendoza

Suresh Thanneeru

Egil Gronstad

Kun Lu

Rahul Pal

Kameswaran Arunachalam

Praveen Singaram Muthukumar

Swetha Gopisetti

Zenaida Castro Canlas-Factora

John Paul Tuscano Cruz

Rushabhkumar Dahyabhai Patel

Aziz Motiwala

A wireless communication network handles Session Management Function (SMF) outage in a Tracking Area (TA). An external SMF that is outside the TA registers with an internal Network Repository Function (NRF) that is inside in the TA. The internal NRF detects the SMF outage for an internal SMF inside the TA. The internal NRF receives an SMF request from an internal Access and Mobility Management Function (AMF) inside the TA. In response to the SMF outage, the internal NRF transfers an SMF response to the internal AMF that indicates the external SMF. The external SMF receives network signaling from the internal AMF and responsively directs an external User Plane Function (UPF) that is outside the TA to exchange user data with internal wireless access nodes that are inside the TA.

Session management function (SMF) outage protection in a wireless communication network

To facilitate a handover of mobile devices from 5Generation New Radio (5G) networks to 4Generation (4G) networks, an accessibility and mobility management function (AMF) of the 5G network core inactivates a data session in which the mobile device is assigned an Internet protocol version 6 (IPv6) address when the mobile device is to be assigned an IP version 4 (IPv4) address in the 4G network. The AMF generates a modified context of the mobile device that omits the IPv6 address of the device. The inactivation of the IPv6 session causes the mobile device to initiate a new data session with the 4G core network, in which the device will be assigned an IPv4 address for use on the 4G network. The modified context is used by the 4G network to configure communications for the mobile device without interrupting network service to the mobile device.

Handovers between 5G radio access networks and IPV4 public data network sessions

The current disclosure relates to a system and method for optimizing network access for a roaming device. In particular, the method includes receiving a request for network access from a client device. The method then determines if the device is roaming. If the device is roaming, the method then includes selecting one or more gateways for the roaming device and transmitting the selected gateways to the roaming device. Such gateways may be selected based upon device location within the roaming network to reduce latency or improve other performance metrics.

Optimization for roaming geolocated home network gateway selection

Systems, methods, and process nodes for managing device connections in a telecommunications network perform and/or comprise: receiving a connection request from a wireless device at a first Public Land Mobile Network (PLMN) of the telecommunications network; comparing a capability report of the wireless device to a predetermined criteria, wherein the predetermined criteria corresponds to whether the wireless device is compatible with the first PLMN; and in response to a determination that the capability report meets the predetermined criteria, denying the connection request.

System and method for device management to restrict handover and attach

To facilitate a handover of mobile devices from 4th Generation (4G) networks to 5th Generation (5G) networks, a mobility management entity (MME) of the 4G network core inactivates a data session in which the mobile device is assigned an Internet protocol version 4 (IPv4) address. The MME generates a modified context of the mobile device that omits the IPv4 address of the device. The inactivation of the IPv4 session causes the mobile device to initiate a new data session with the 5G core network, in which the device will be assigned a new IPv6 address for use on a data network. The modified context is used by the 5G network to configure communications for the mobile device without interrupting network service to the mobile device.

Handovers between IPV4 public data network sessions and 5G radio access networks

A carrier network may provide connection establishment and routing optimization for Service Capability Exposure Function (SCEF). For example, a Mobility Management Entity (MME) component may transmit, to a SCEF, a connection request to establish a session, the request using a first SCEF identifier (ID). The MME may receive, from a particular SCEF instance of the SCEF, an answer for the session, the answer including an identifier that is different from the first SCEF-ID, the identifier associated with the particular SCEF instance. The MME may transmit, to the particular SCEF instance, a subsequent message for the session, wherein a second SCEF-ID of the subsequent message is associated with the identifier and is different from the first SCEF-ID.

Routing optimization for service capability exposure

A core network element, such as a PCRF and/or an MME, can determine that a Quality of Service (QoS) Class Indicator (QCI) of particular bearer set up between the core network and user equipment (UE) should be changed to a new QCI. When a control node, such as the MME, determines that no teardown delay conditions are met, the control node can send a bearer release message to a base station that instructs the base station to tear down all bearers for the UE, even if they are in use. In a dual connectivity arrangement, such as a E-UTRAN New Radio-Dual Connectivity (EN-DC) configuration, the base station can instruct a secondary base station to also release all bearers for the UE. The control node can instruct the base station to reestablish the particular bearer with the new QCI when the base station reestablishes the bearers for the UE.

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Bothell, WA, United States of America

Kunal Prakash Barawkar