Abstract: System and methods for using a visitor subscriber service (VSS) to provide short messaging services (SMS) on an advanced network for inbound roamers are described. The VSS acts as proxy for registration services and uses profile information of a roaming UE to either route a mobile terminated SMS message for the UE to an IMS if the UE supports SMS over IMS, or, to a mobile call operator (MCO) using SMS over SGS if the UE does not support SMS over IMS. The VSS interfaces with a home location register (HLR) of a HPLMN of the UE to provide a visitor location register (VLR) address of the VSS. The VLR address is used by an SMSC of the HPLMN to route the SMS message to the VSS. The MCO interfaces with a mobility management entity (MME) to which the UE attaches during a registration operation.

Abstract: Solutions for providing a data traffic session with proxy-call session control function (P-CSCF) restoration include: receiving an indication, by an application server (AS), that a user equipment (UE) is registered with a first proxy node; receiving, at a subscriber information node, from a call session control function (e.g., over an N70 interface), a first message triggering proxy node restoration; based on at least receiving the first message triggering proxy node restoration, transmitting, by the subscriber information node, to a management node, a second message triggering proxy node restoration; receiving an indication, by the AS, that the UE is registered with a second proxy node different than the first proxy node; and based on at least receiving a session initiation message, establishing the data traffic session for the UE with the second proxy node.

Abstract: Solutions for providing a data traffic session with proxy-call session control function (P-CSCF) restoration include: receiving an indication, by an application server (AS), that a user equipment (UE) is registered with a first proxy node; receiving, at a subscriber information node, from a call session control function (e.g., over an N70 interface), a first message triggering proxy node restoration; based on at least receiving the first message triggering proxy node restoration, transmitting, by the subscriber information node, to a management node, a second message triggering proxy node restoration; receiving an indication, by the AS, that the UE is registered with a second proxy node different than the first proxy node; and based on at least receiving a session initiation message, establishing the data traffic session for the UE with the second proxy node.

Abstract: Gatekeeping for roaming WiFi callers includes: receiving, by a first wireless network node, from a second wireless network node, an authentication request identifying a user equipment (UE) that is requesting a call over WiFi and identifying a network address of the UE; based on at least the network address of the UE, determining a location of the UE; based on at least the location of the UE, determining whether the call is permitted; based on at least determining that the call is not permitted for the UE, responding with a message that blocks the call. Solutions also include: receiving, by the second wireless network node, from a packet data gateway, a request for a call over WiFi; based on at least receiving the request, transmitting the authentication request to the first wireless network node, the authentication request identifying the network address of the UE.

Abstract: An improved telecommunications network that can reduce the network load on a rich communication services (RCS) server and/or local routers that implement 1-to-N and/or M-to-N services is described herein. In particular, the improved telecommunications network may include an improved RCS server that can route secure multicast messages instead of and/or in addition to unicast messages. For example, the improved RCS server can create a multicast group for a group of UEs in response to a request from a UE to create a group of UEs. Creation of the multicast group may include creating a shared multicast group key (SMGK) for the multicast group and/or selecting a security algorithm for the multicast group. The improved RCS server can then distribute the SMGK and/or the selected security algorithm to the UEs such that the UEs can use the SMGK and/or the selected security algorithm to encrypt and/or decrypt messages.

Abstract: When operational, a first node of an IMS network handles a registration of a UE on the IMS network, and receives a first request to reregister the UE with the IMS network. The first node creates a registration confirmation, and sends the registration confirmation to the UE. The second node of the IMS network receives a second request to reregister the UE with the IMS network and an indication that the first node has failed. The second node reduces IMS network congestion by avoiding reporting to the UE that the first node has failed, and by sending a message confirming reregistration. Upon receiving the message, the UE considers the registration valid for a predetermined period. Upon expiration of the predetermined period the UE sends a request to reregister. The message prevents the UE from congesting the IMS network.

Abstract: When operational, a first node of an IMS network handles a registration of a UE on the IMS network, and receives a first request to reregister the UE with the IMS network. The first node creates a registration confirmation, and sends the registration confirmation to the UE. The second node of the IMS network receives a second request to reregister the UE with the IMS network and an indication that the first node has failed. The second node reduces IMS network congestion by avoiding reporting to the UE that the first node has failed, and by sending a message confirming reregistration. Upon receiving the message, the UE considers the registration valid for a predetermined period. Upon expiration of the predetermined period the UE sends a request to reregister. The message prevents the UE from congesting the IMS network.

Abstract: An improved telecommunications network that can reduce the network load on a rich communication services (RCS) server and/or local routers that implement 1-to-N and/or M-to-N services is described herein. In particular, the improved telecommunications network may include an improved RCS server that can route multicast messages instead of and/or in addition to unicast messages. For example, the improved RCS server can create a multicast group for a group of UEs in response to a request from a UE to create a group of UEs. Creation of the multicast group may include assigning a group Internet protocol (IP) address to the multicast group. The improved RCS server can then determine which UEs in the multicast group are capable of sending and/or receiving multicast messages, and send multicast messages instead of unicast messages to these UEs.

Abstract: When operational, a first node of an IMS network handles a registration of a UE on the IMS network, and receives a first request to reregister the UE with the IMS network. The first node creates a registration confirmation, and sends the registration confirmation to the UE. The second node of the IMS network receives a second request to reregister the UE with the IMS network and an indication that the first node has failed. The second node reduces IMS network congestion by avoiding reporting to the UE that the first node has failed, and by sending a message confirming reregistration. Upon receiving the message, the UE considers the registration valid for a predetermined period. Upon expiration of the predetermined period the UE sends a request to reregister. The message prevents the UE from congesting the IMS network.

Abstract: Methods, devices, and system related to providing service-based interfaces between network functions and a proxy call session control function for Internet Protocol (IP) Multimedia Subsystem services. In one example aspect, a method for wireless communication includes retrieving, by a proxy call session control function, an address of an access and mobility management function from a unified data management function. The proxy call session control function is configured to communicate with the unified data management function directly via a first service-based interface. The method also includes retrieving, by the proxy call session control function, information from the access and mobility management function. The proxy call session control function is configured to communicate with the access and mobility management function directly via a second service-based interface.

Abstract: When operational, a first node of an IMS network handles a registration of a UE on the IMS network, and receives a first request to reregister the UE with the IMS network. The first node creates a registration confirmation, and sends the registration confirmation to the UE. The second node of the IMS network receives a second request to reregister the UE with the IMS network and an indication that the first node has failed. The second node reduces IMS network congestion by avoiding reporting to the UE that the first node has failed, and by sending a message confirming reregistration. Upon receiving the message, the UE considers the registration valid for a predetermined period. Upon expiration of the predetermined period the UE sends a request to reregister. The message prevents the UE from congesting the IMS network.

Abstract: A network may include a proxy-call session control function (P-CSCF) of a communication network that is configured to determine, record, and report on call types of calls originating from user equipment associated with the communication network. In some cases, the P-CSCF may determine the call type based on radio access technology types reported by the originating user equipment and/or by a proxy control function associated with the call.

Abstract: Techniques for determining contact information for an anonymous device on a telecommunications network are described herein. The telecommunications network can implement a server to determine data representing a callback number or other subscriber information for a user equipment (UE) associated with an anonymous status. The server can generate a request for the data based on identifying an anonymous status associated with a message from the UE. The server can request the data from a gateway mobile location center (GMLC) of the telecommunications network using a Representational State Transfer (REST) interface. The server can establish a communication session for the UE by sending the callback number and/or the subscriber information to an emergency service center (e.g., to enable a Public Service Answering Point to communicate with the UE if the communication session is lost).

Abstract: Methods, devices, and system related to providing service-based interfaces between network functions and a proxy call session control function for Internet Protocol (IP) Multimedia Subsystem services. In one example aspect, a method for wireless communication includes retrieving, by a proxy call session control function, an address of an access and mobility management function from a unified data management function. The proxy call session control function is configured to communicate with the unified data management function directly via a first service-based interface. The method also includes retrieving, by the proxy call session control function, information from the access and mobility management function. The proxy call session control function is configured to communicate with the access and mobility management function directly via a second service-based interface.

Abstract: Systems, methods, and devices that relate to adapting the SEPP as a Network Function (NF) under the 5G SBA are disclosed. In one example aspect, a system for wireless communication includes a first SEPP network function located at an edge of a first network, a first network repository function in communication with the SEPP network function, and a root SEPP discovery node in communication with the first network repository function and a second network repository function of a second network. The second network repository function of the second network is in communication with a second SEPP network function located at an edge of the second network. The root SEPP discovery node is configured to store information of different SEPP network functions that include the first and the second SEPP network functions available in different networks globally or regionally.

Abstract: Solutions for providing a data traffic session with proxy-call session control function (P-CSCF) restoration include: receiving an indication, by an application server (AS), that a user equipment (UE) registered with a first proxy node; receiving, by the AS, from a call session control function, a first indication that the first proxy node is unavailable; based on at least receiving the first indication that the first proxy node is unavailable, transmitting, by the AS, to a subscriber information node, a first message triggering proxy node restoration (e.g., over an N71 interface); receiving an indication, by the AS, that the UE is registered with a second proxy node different than the first proxy node; and based on at least receiving a session initiation message, establishing the data traffic session for the UE with the second proxy node.

Abstract: Disclosed is a system and method to route a call from a roaming UE on a 5G network. The system receives from a UE belonging to a home network an indication of a call to a dialed number. The call requires information associated with the UE that is not available to the first wireless telecommunication network, because the UE is roaming on a visitor network. The indication of the call includes a unique identifier of the visitor network. The system can determine based on the unique identifier that the UE is roaming and send a request to the visitor network to provide instructions on how to route the received call. Upon obtaining the instructions on how to route the received call, the system routes the received call.

Abstract: Systems and methods for establishing a communication interface between control functions of a network core and a network data node associated with a user side packet core are discussed herein. The system can enable configuration information to be stored and dynamically updated by the network data node such that control nodes of the user side packet core requesting service from the network core are provided with up to date configuration information associated with active control functions. As control functions are activated and deactivated, the configuration information can be updated to reflect the current state of the network core and ensure that user device connects are routed to active control functions configured to provide user requested services.

Abstract: An improved telecommunications network that can reduce the network load on a rich communication services (RCS) server and/or local routers that implement 1-to-N and/or M-to-N services is described herein. In particular, the improved telecommunications network may include an improved RCS server that can route multicast messages instead of and/or in addition to unicast messages. For example, the improved RCS server can create a multicast group for a group of UEs in response to a request from a UE to create a group of UEs. Creation of the multicast group may include assigning a group Internet protocol (IP) address to the multicast group. The improved RCS server can then determine which UEs in the multicast group are capable of sending and/or receiving multicast messages, and send multicast messages instead of unicast messages to these UEs.

Abstract: Disclosed is a system and method to route a call from a roaming UE on a 5G network. The system receives from a UE belonging to a home network an indication of a call to a dialed number. The call requires information associated with the UE that is not available to the first wireless telecommunication network, because the UE is roaming on a visitor network. The indication of the call includes a unique identifier of the visitor network. The system can determine based on the unique identifier that the UE is roaming and send a request to the visitor network to provide instructions on how to route the received call. Upon obtaining the instructions on how to route the received call, the system routes the received call.