Abstract: Systems, methods, and software are disclosed herein for detecting and monitoring changes in subscription status of UEs registering for services of wireless communication networks in various implementations. In one example, a method of operating a wireless network comprises maintaining a database of roaming devices previously registered with the wireless network. During a visit by a UE to the wireless network, receiving a registration request for the UE is received and the database of roaming registrations is searched for a previous registration by the UE. The registration request is then processed based on the previous registration by the UE.

Abstract: Disclosed solutions enable identification of the true location of roaming user equipment (UE) that are receiving Home Routing services, and have assigned IP addresses that are publicly associated with the country of the UEs'home mobile network operator (MNO). This permits security controls, which limit access to internet-exposed assets according to the country in which a device is located, to correctly identify the locations of UEs. Multiple solutions may be used individually or in combination: An association of a UE's assigned IP address, with the visited wireless network's mobile country code (MCC), is posted while Home Routing is ongoing. The visited wireless network's MCC is injected into packets that the home MNO places onto the internet. The home MNO's set of assignable IP addresses are separated into pools each labeled with a roaming destination's MCC; this scheme is used to assign IP address to UEs and is publicized for lookup.

Abstract: Disclosed solutions enable identification of the true location of roaming user equipment (UE) that are receiving Home Routing services, and have assigned IP addresses that are publicly associated with the country of the UEs'home mobile network operator (MNO). This permits security controls, which limit access to internet-exposed assets according to the country in which a device is located, to correctly identify the locations of UEs. Multiple solutions may be used individually or in combination: An association of a UE's assigned IP address, with the visited wireless network's mobile country code (MCC), is posted while Home Routing is ongoing. The visited wireless network's MCC is injected into packets that the home MNO places onto the internet. The home MNO's set of assignable IP addresses are separated into pools each labeled with a roaming destination's MCC; this scheme is used to assign IP address to UEs and is publicized for lookup.

Abstract: Disclosed solutions enable identification of the true location of roaming user equipment (UE) that are receiving Home Routing services, and have assigned IP addresses that are publicly associated with the country of the UEs'home mobile network operator (MNO). This permits security controls, which limit access to internet-exposed assets according to the country in which a device is located, to correctly identify the locations of UEs. Multiple solutions may be used individually or in combination: An association of a UE's assigned IP address, with the visited wireless network's mobile country code (MCC), is posted while Home Routing is ongoing. The visited wireless network's MCC is injected into packets that the home MNO places onto the internet. The home MNO's set of assignable IP addresses are separated into pools each labeled with a roaming destination's MCC; this scheme is used to assign IP address to UEs and is publicized for lookup.

Abstract: Subscriber service validation using subscription concealed identifier (SUCI) cleartext is disclosed. When a user equipment (UE) attempts to register with a wireless network, it sends its SUCI which has an encrypted subscription permanent identifier (SUPI), but also a routing indicator in cleartext (unencrypted). This is available to the base station. By formulating a list of routing indicators associated with roaming partners (along with its own routing indicator), the base station is able to identify UEs that should be approved for registration. This precludes the need for the access and mobility function (AMF) to involve the authentication server function (AUSF) and unified data management (UDM) in decrypting the SUPI for unauthorized UEs, thereby reducing network traffic. Identification of the public key, associated with the private key used to encrypt the SUPI, is also within the SUCI in cleartext, and so may be used in place of the routing indicator.

Abstract: The present invention relates to a system and method for managing the deregistration of a User Equipment (UE) from an Internet Protocol Multimedia Subsystem (IMS) when the UE roams to a Non-Terrestrial Network (NTN) that does not support IMS. The system introduces a Roaming Orchestrator within the home network of the UE, which receives an indication that the UE is connected to a network lacking IMS support. Upon receiving this indication, the Roaming Orchestrator initiates standard message requests to deregister the UE from the IMS, thereby preventing unnecessary signaling traffic and reducing delays in message delivery. This method ensures efficient use of network resources and improves the reliability of communication services, particularly in time-sensitive scenarios such as emergency communications.

Abstract: Aspects provided herein provide methods, systems, and a non-transitory computer storage media storing computer-useable instructions for SMS device handling in a network is provided. The method comprises determining a communication capable equipment (CCE) is attempting to connect through a public land mobile network (PLMN) associated with a base station. The method further comprises querying a short-message-service (SMS)-only PLMN table indexed by a PLMN identifier, and determining that the PLMN is included in the SMS-only PLMN table. Based on determining that the PLMN is included in the SMS only PLMN table, communicating an SMS-only connectivity request with an SMS bearer without an internet protocol multimedia system (IMS) bearer or a default data bearer.

Abstract: The present disclosure is directed to determining location information of a roamer of a visiting network. A location network function (NF) may request for location information associated with the roamer of the visiting mobile communication network. The NF may request a roaming location identifier from a roaming NF. The location NF receives the roaming location identifier, which may be associated with a mobility NF. The location NF may request the location information from the mobility NF associated with the roaming location identifier.

Abstract: The disclosed technology performs routing of PDU session requests in overlapping coverage areas based on identification information associated with the PDU session requests. Upon receiving the PDU session request initiated from a wireless device, a roaming proxy of a home network retrieves identification information associated with the PDU session request. Based on the identification information, the roaming proxy determines whether the PDU session request was created in an overlapping area of two coverage areas of the home network and a visited network. The roaming proxy notifies a network node of the home network to allow or reject the PDU session request based on the determination. The roaming proxy further notifies a network node of the home network to de-register the wireless device from the visited network.

Abstract: Various embodiments comprise a Fifth Generation (5G) visited wireless communication network to interwork with a Long Term Evolution (LTE) home network. In some examples, the 5G visited wireless communication network comprises an Access and Mobility Management Function (AMF) and an Interworking Function (IWF). The AMF receives a service request from a 5G capable visiting user device. The AMF generates Fifth Generation Core (5GC) authentication signaling to authenticate the visiting user device. Prior to delivering the 5GC authentication signaling to the home network, the IWF translates the 5GC authentication signaling into Evolved Packet Core (EPC) authentication signaling and transfers the EPC authentication signaling to the home network. The IWF receives an EPC authentication response from the home network and translates the EPC authentication response into a 5GC authentication response.

Abstract: A telecommunications network provides selective roaming for user equipment (UE) devices registered to the network, allowing some UE devices to operate on a roaming network in some geographic regions and disallowing other UE devices to access roaming networks. While a target UE device is operating on a roaming network, the telecommunications network monitors changes in location of the target UE device. If the target UE device is detected to have moved into an overlapping coverage area, covered by both the telecommunications network and the roaming network, the telecommunications network applies an overlapping coverage policy to determine whether the target UE device will maintain the attachment to the roaming network or will discontinue the attachment.

Abstract: A telecommunications network provides selective roaming for user equipment (UE) devices registered to the network, allowing some UE devices to operate on a roaming network in some geographic regions and disallowing other UE devices to access roaming networks. While a target UE device is operating on a roaming network, the telecommunications network monitors changes in location of the target device. If the target UE device is detected to have moved into an overlapping coverage area, covered by both the telecommunications network and the roaming network, the telecommunications network generates a command to cancel the subscription of the target UE device to the roaming network.

Abstract: Subscriber service validation using subscription concealed identifier (SUCI) cleartext is disclosed. When a user equipment (UE) attempts to register with a wireless network, it sends its SUCI which has an encrypted subscription permanent identifier (SUPI), but also a routing indicator in cleartext (unencrypted). This is available to the base station. By formulating a list of routing indicators associated with roaming partners (along with its own routing indicator), the base station is able to identify UEs that should be approved for registration. This precludes the need for the access and mobility function (AMF) to involve the authentication server function (AUSF) and unified data management (UDM) in decrypting the SUPI for unauthorized UEs, thereby reducing network traffic. Identification of the public key, associated with the private key used to encrypt the SUPI, is also within the SUCI in cleartext, and so may be used in place of the routing indicator.

Abstract: A telecommunications network provides selective roaming for user equipment (UE) devices registered to the network, allowing some UE devices to operate on a roaming network in some geographic regions and disallowing other UE devices to access roaming networks. The telecommunications network maintains mappings between UE devices and roaming permissions for each UE device. When a target UE device requests to attach to a roaming network, the roaming network passes the request, with an identifier of a particular geographic region in which the request was received, to the telecommunications network to query the mappings. If the mappings indicate the target UE device is authorized to access the roaming network in the particular geographic region, the telecommunications network allows the target UE device to attach to the roaming network.

Abstract: Various embodiments comprise a Fifth Generation (5G) visited wireless communication network to interwork with a Long Term Evolution (LTE) home network. In some examples, the 5G visited wireless communication network comprises an Access and Mobility Management Function (AMF) and an Interworking Function (IWF). The AMF receives a service request from a 5G capable visiting user device. The AMF generates Fifth Generation Core (5GC) authentication signaling to authenticate the visiting user device. Prior to delivering the 5GC authentication signaling to the home network, the IWF translates the 5GC authentication signaling into Evolved Packet Core (EPC) authentication signaling and transfers the EPC authentication signaling to the home network. The IWF receives an EPC authentication response from the home network and translates the EPC authentication response into a 5GC authentication response.

Abstract: A telecommunications network provides selective roaming for user equipment (UE) devices registered to the network, allowing some UE devices to operate on a roaming network in some geographic regions and disallowing other UE devices to access roaming networks. The telecommunications network maintains mappings between UE devices and roaming permissions for each UE device. When a target UE device requests to attach to a roaming network, the roaming network passes the request, with an identifier of a particular geographic region in which the request was received, to the telecommunications network to query the mappings. If the mappings indicate the target UE device is authorized to access the roaming network in the particular geographic region, the telecommunications network allows the target UE device to attach to the roaming network.

Abstract: A system facilitates handover of mobile devices from one telecommunications network to another. The system receives a communication indicating a request by a user equipment (UE) to transfer from (i) a first communication session within a first telecommunications network, in which the UE is assigned a first IP address, to (ii) a second communication session within a second telecommunications network, in which the first IP address is invalid. The system transfers a context of the UE from the first telecommunications network to the second telecommunications network that does not include the first IP address. The context causes the second telecommunications network to notify the UE that the first communication session is inactive and to facilitate assignment of a second IP address to the UE in the second communication session. The system then releases the first IP address.

Abstract: To facilitate a handover of mobile devices from 5th Generation New Radio (5G) networks to 4th Generation (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.

Abstract: Aspects provided herein provide methods, systems, and a non-transitory computer storage media storing computer-useable instructions for packet data network device handling in a resource constrained network. A resource constrained network may be an extra-terrestrial network with limited bandwidth. This limited bandwidth may cause the typical process of establishing a default data bearer before establishing an IMS bearer unfeasible, as too much bandwidth may be used by the default data bearer. Aspects discussed below provide a mechanism to establish an IMS bearer without establishing a default data bearer. The method begins with determining a public land mobile network (PLMN) associated with a base station which a UE is attempting to connect to. Then, based on a determination that the PLMN associated with the base station does not allow connection with a PDN data bearer, a PDN connectivity request is communicated with an IMS bearer and without a data bearer.

Abstract: A telecommunications network provides selective roaming for user equipment (UE) devices registered to the network, allowing some UE devices to operate on a roaming network in some geographic regions and disallowing other UE devices to access roaming networks. While a target UE device is operating on a roaming network, the telecommunications network monitors changes in location of the target device. If the target UE device is detected to have moved into an overlapping coverage area, covered by both the telecommunications network and the roaming network, the telecommunications network generates a command to cancel the subscription of the target UE device to the roaming network.