Abstract: A system of a telecommunications network that uses IP Multimedia Subsystem (IMS) network elements to screen inbound calls. A Media Resource Function (MRF) intercepts an inbound call and uses various techniques to screen the call. The MRF redirects the call to an interactive voice response (IVR) system, which prompts the caller to state the caller's name, records the caller's response, and relays it to the called subscriber, who can then decide to accept or reject the call. The system can present a random number challenge to the caller. The system can use machine learning analytics and a large language model (LLM) to analyze the response's contents, accepting the call only if it relates to a topic allowed by the subscriber, perform audio analysis to determine whether the caller sounds robotic, or detect whether the response contains other known robocall markers.

Abstract: A network operator can partition network elements, including elements of an IP Multimedia Subsystem (IMS) or Policy and Charging Rules Functions (PCRFs) into groups reserved for specific types of subscribers. When a user equipment (UE) registers with an IMS, elements of the IMS can contact a Home Subscriber Server (HSS) to determine a subscriber type associated with the UE. Based on the UE's subscriber type, an IMS element can determine an application server or other IMS element to contact about the UE based on identifying application servers or IMS elements that are also associated with the same subscriber type as the UE. Similarly, an IMS element can determine a PCRF to contact about the UE based on identifying a PCRF that is associated with the same subscriber type as the UE.

Abstract: Various embodiments comprise wireless communication networks to support slicing in an Internet Protocol Multimedia Subsystem (IMS) core. In some examples, the wireless communication network comprises a multimedia function and a network data system. The multimedia function receives a registration request indicating a User Equipment (UE) Identifier (ID). The multimedia function queries a network data system for UE subscription information. The network data system correlates the UE ID to slice information associated with a UE and indicates the slice information to the multimedia function. The multimedia function receives the slice information from the network data system and responsively caches the slice information in association with the UE ID.

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: A method of authorizing an IMS call in a foreign country for a wireless communication device that has a wireless communication subscription service with a US wireless communication service provider. The method comprises receiving a request to originate an IMS call by a HSS located in the US, wherein the request is received from a first wireless communication device located outside of the US and the request identifies a first country; determining by the HSS that international IMS roaming service is allowed by the wireless communication service provider in the first country; determining by the HSS that a first wireless communication subscription service associated with the first wireless communication device allows international IMS roaming service; and sending an authorization to originate the IMS call by the HSS to the first wireless communication device, whereby the first wireless communication device is enabled to originate the IMS call in the first country.

Abstract: Improved systems and method are described for addressing issues when an S-CSCF goes appears non-responsive or an application server appears non responsive. Profile recovery is executed through application servers which may allow additional options in efficiencies in maintain applications while recovering from the non-responsive devices.

Abstract: A system of a telecommunications network that uses IP Multimedia Subsystem (IMS) network elements to screen inbound calls. A Media Resource Function (MRF) intercepts an inbound call and uses various techniques to screen the call. The MRF redirects the call to an interactive voice response (IVR) system, which prompts the caller to state the caller's name, records the caller's response, and relays it to the called subscriber, who can then decide to accept or reject the call. The system can present a random number challenge to the caller. The system can use machine learning analytics and a large language model (LLM) to analyze the response's contents, accepting the call only if it relates to a topic allowed by the subscriber, perform audio analysis to determine whether the caller sounds robotic, or detect whether the response contains other known robocall markers.

Abstract: Systems, methods, and devices that relate to prompt restoration of Internet Protocol (IP) Multimedia Subsystem (IMS) services when a Serving Call Session Control Function (S-CSCF) becomes unavailable are disclosed. In one example aspect, a method for wireless communication includes receiving, by a first network node in a network, a user profile associated with a user device from a home server configured to manage subscriber information. The user profile comprises binding information about a Proxy Call Session Control Function (P-CSCF) that is in communication with the user device. The method also includes retrieving, by a second network node, the binding information of the P-CSCF upon a third network node being unreachable for completing a call for the user device to enable a completion of the call for the user device.

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: Systems, methods, and devices that relate to staged discontinuation of the circuit-switched fallback are disclosed. In one example aspect, a method for wireless communication includes receiving, by a network server configured to manage subscriber data, a request from a telephony application server requesting a routing of a call or a message for a mobile subscriber and transmitting, by the network server to the telephony application server, a response indicating that the packet-switched network is not available for routing the call or the message. The response comprises a value that identifies the location of the mobile subscriber to enable the telephony application server to refrain from transmitting a subsequent request requesting the routing of the call or the message using the circuit-switched network.

Abstract: Solutions for providing best effort service for voice calls (including video calls) using a non-guaranteed bit rate (GBR) bearer include: receiving, at a proxy node (e.g., a proxy-call session control function (P-CSCF)), a request to set up a voice session for a UE; requesting, by the proxy node, a policy node (e.g., a policy and charging rules function (PCRF) or a policy control function (PCF)) to set up a GBR data pipe (e.g., a dedicated bearer, a quality of service (QOS) class identifier (QCI) 1 bearer, or a fifth generation (5G) QoS identifier (5QI) 1 bearer); based at least on an error condition (e.g., a timeout or error message), instructing, by the proxy node, the UE to set up the voice session using an existing non-GBR data pipe (e.g., a default bearer, a QCI-5 bearer, or a 5QI-5 bearer).

Abstract: Various embodiments comprise wireless communication network to register user devices with multimedia systems. In some examples, the wireless communication network comprises multimedia functions and a subscriber server. A first multimedia function receives a registration request for a wireless user device, selects the subscriber server from a plurality of available subscriber servers, and transfers a user authorization request for the user device to the subscriber server. The subscriber server receives the user authorization request and transfers a response indicating a server Identifier (ID) for the subscriber server. The first multimedia function receives the response and indicates the server ID and the registration request to a second multimedia function. The second multimedia function receives the server ID and the registration request, selects the same subscriber server based on the server ID, and transfers a multimedia authorization request to the subscriber server.

Abstract: Techniques are described herein for providing improved communication forwarding implementation for a user equipment. In embodiments, such techniques may be performed at least portion on one of an application server. Such techniques may comprise receiving, from a first user equipment, a request to implement a service in relation to the first user equipment, determining that the service relates to forwarding communications directed to the first user equipment to a second user equipment, providing, to the first user equipment, a notification including information about the service, receiving, from the first user equipment, a response to the notification, and making a determination about an implementation of the service based on the received response.

Abstract: A user equipment (UE) can attempt to register with an IP Multimedia Subsystem (IMS) that includes Call Session Control Functions (CSCFs), such as a Proxy CSCF (P-CSCF), an Interrogating CSCF (I-CSCF), and a Serving CSCF (S-CSCF). In situations in which IMS registration procedures may otherwise fail for the UE, due to an unreachable I-CSCF and/or S-CSCF, a P-CSCF can pseudo-register the UE with the IMS by informing the UE that the UE is registered with the IMS. If the UE attempts to initiate a service via the IMS while being pseudo-registered with the IMS, the P-CSCF can instruct other IMS elements to accept the UE and provide the service to the UE even though the UE is not fully registered with the IMS.

Abstract: Solutions for providing best effort service for voice calls (including video calls) using a non-guaranteed bit rate (GBR) bearer include: receiving, at a proxy node (e.g., a proxy-call session control function (P-CSCF)), a request to set up a voice session for a UE; requesting, by the proxy node, a policy node (e.g., a policy and charging rules function (PCRF) or a policy control function (PCF)) to set up a GBR data pipe (e.g., a dedicated bearer, a quality of service (QoS) class identifier (QCI) 1 bearer, or a fifth generation (5G) QoS identifier (5QI) 1 bearer); based at least on an error condition (e.g., a timeout or error message), instructing, by the proxy node, the UE to set up the voice session using an existing non-GBR data pipe (e.g., a default bearer, a QCI-5 bearer, or a 5QI-5 bearer).

Abstract: A system of a telecommunications network that uses IP Multimedia Subsystem (IMS) network elements to screen inbound calls. A Media Resource Function (MRF) intercepts an inbound call and uses various techniques to screen the call. The MRF redirects the call to an interactive voice response (IVR) system, which prompts the caller to state the caller's name, records the caller's response, and relays it to the called subscriber, who can then decide to accept or reject the call. The system can present a random number challenge to the caller. The system can use machine learning analytics and a large language model (LLM) to analyze the response's contents, accepting the call only if it relates to a topic allowed by the subscriber, perform audio analysis to determine whether the caller sounds robotic, or detect whether the response contains other known robocall markers.

Abstract: In a telecommunication network, network slices can be identified by slice identifiers used within a core network. The same slice identifiers can also be used by elements of an IP Multimedia Subsystem (IMS) to identify the network slices. For example, a Home Subscriber Server (HSS) can be provisioned with user data associated with a user equipment (UE), including a slice identifier of a network slice that the UE is assigned to use. The HSS can provide the slice identifier to an S-CSCF in the IMS when the UE registers with the IMS. The S-CSCF can share the slice identifier with other IMS elements, such as a P-CSCF and/or one or more application servers. Accordingly, the IMS elements can determine key performance indicators (KPIs) and perform other operations in association with usage of network slices by UEs, based on the same slice identifiers used within the core network.

Abstract: A network may include an International Serials Data System (ISDS) that is configured to register and determine an identity of a receiving or originating user equipment (UE) that has a home network that operates using a different format or standard than the current network. The ISDS may be configured to generate transmissions on behalf of the UE for registration and identification for outgoing and incoming voice or text messages using the format of both networks.

Abstract: A user equipment (UE) can attempt to register with an IP Multimedia Subsystem (IMS) that includes Call Session Control Functions (CSCFs), such as a Proxy CSCF (P-CSCF), an Interrogating CSCF (I-CSCF), and a Serving CSCF (S-CSCF). In situations in which IMS registration procedures may otherwise fail for the UE, due to an unreachable I-CSCF and/or S-CSCF, a P-CSCF can pseudo-register the UE with the IMS by informing the UE that the UE is registered with the IMS. If the UE attempts to initiate a service via the IMS while being pseudo-registered with the IMS, the P-CSCF can instruct other IMS elements to accept the UE and provide the service to the UE even though the UE is not fully registered with the IMS.

Abstract: Methods and systems for restricting communication services over a network. The method includes detecting a Session Initiation Protocol (SIP) register message originating from a specific network Public Land Mobile Network (PLMN) that is included in a restricted PLMN list identified by a P-Access-Network-Information header (P-ANI). The method further includes implementing a policy to remove RCS and presence capability feature tags from a subsequent SIP register message. The lack of feature tags to Serving Call Session Control Function (S-CSCF) will prohibit triggering of Third Party Registration to different application servers.