Abstract: A technique for preparing User Equipment, UE, mobility from a 4G network to a 5G network for a UE moving from a 2G/3G network to the 5G network via the 4G network is disclosed. A method implementation of the technique is performed by a network node and comprises triggering terminating one or more Packet Data Network, PDN, connections associated with the UE when the UE moves from the 2G/3G network to the 4G network forcing the UE to reestablish connectivity with the 4G network prior to moving from the 4G network to the 5G network.

Abstract: A technique for preparing User Equipment, UE, mobility from a 4G network to a 2G/3G network for a UE moving from a 5G network to the 2G/3G network via the 4G network is disclosed. A method implementation of the technique is performed by a network node after the UE has moved from the 5G network to the 4G network and includes triggering, for each of one or more bearers handed over from the 5G network to the 4G network for the UE, an update bearer procedure to provide one or more 2G/3G Quality of Service, QoS, parameters to the UE required to hand over the respective bearer to the 2G/3G network when the UE moves from the 4G network to the 2G/3G network.

Abstract: A method for operating a mobile entity in a mobile communications network having at least one slice is provided. The slice of the mobile communication to which the mobile entity intends to connect is determined. Additionally, whether a relationship can be identified in the mobile entity is determined. The relationship indicates whether the slice to which the mobile entity intends to connect is related to an access point of the that slice. A request message is then transmitted to a radio access network (RAN) of the mobile communications network that includes the identified relationship.

Abstract: The embodiments herein relate to terminating call handling for power saving activated user equipment. In one embodiment, there proposes a method in a IP Multimedia Subsystem Application Server, IMS-AS, for handling a terminating call for a User Equipment, UE, using power saving functionality, comprising: obtaining power saving information of the UE; handling the terminating call based on the power saving information. With the embodiments, the time and network resource for the terminating call can be saved and the user's experience can be enhanced.

Abstract: A method in a proxy call session control function, P-CSCF, of handling an unauthenticated emergency call originating from a roaming user equipment that is not attached to the P-CSCF. The P-CSCF receives a session initiation protocol (SIP) REGISTER request from the UE, where the REGISTER request relating to the emergency registration. The P-CSCF determines an IP address of the UE. The P-CSCF sends an identity query to a policy and charging rules function (PCRF) indicating the IP address of the UE and requesting other identifiers of the UE. The P-CSCF receives one or more other identifiers of the UE from the PCRF. The P-CSCF obtains a TEL and/or SIP uniform resource identifier (URI) for the UE on the basis of at least one of the one or more other identifiers. The P-CSCF sends a 200 OK response to the UE in response to the SIP REGISTER request, where the 200 OK response includes the TEL and/or SIP URI.

Abstract: A technique for preparing User Equipment, UE, mobility to a 2G/3G network for a UE moving from a 5G network, optionally via a 4G network, to the 2G/3G network is disclosed. A method implementation of the technique is performed by a network node of the 5G network and comprises triggering (S304) providing one or more 2G/3G Quality of Service, QoS, parameters to the UE required to hand over at least one QoS flow established between the UE and the 5G network to the 2G/3G network when the UE moves to the 2G/3G network.

Abstract: A method of handing over a User Equipment, UE, from a first type of Radio Access Technology, RAT, to a second type of RAT, wherein said UE is attached to a core network via a Radio Access Network, RAN, utilizing said first type of RAT, said method comprising the steps of receiving, by a Mobility Management node in said core network from a network function in said core network, an indication that a particular service is to be invoked for said UE, determining, by said Mobility Management node, that said UE is to be handed over from said first type of RAT to said second type of RAT for supporting said particular service and requesting, by said Mobility Management node, said RAN to hand over said UE from said first RAT to said second RAT.

Abstract: Systems and methods for dynamic Radio Access Technology (RAT)/Frequency Selection Priority (RFSP) selection for a User Equipment (UE) are disclosed. In some embodiments, a method of operation of a core network entity in a core network of a cellular communications system comprises selecting a RFSP index for a UE during setup of a packet data session for the UE where the RFSP index is an index to a specific Radio Resource Management (RRM) configuration for the UE and sending a message comprising the selected RFSP index to another core network entity. In some other embodiments, a method of operation of a core network entity comprises detecting an application that is using a packet data session of a UE, selecting a RFSP index for the UE based on the detected application, and sending a message comprising the RFSP index to another core network entity.

Abstract: A method of operating a policy and charging rules function (“PCRF”) node to handle an internet protocol multimedia subsystem (“IMS”) emergency call can include receiving an identity request from a proxy call session control function (“P-CSCF”) of an IMS network. The identity request can include an internet protocol (“IP”) address for a user equipment (“UE”). The method can further include, responsive to receiving the identity request, determining one or more identifiers of the UE based on the IP address. The one or more identifiers are separate from the IP address. The method can further include, responsive to determining the one or more identifiers, transmitting an indication of the one or more identifiers of the UE to the P-CSCF.

Abstract: A method of operating a user equipment (“UE”) to handle an internet protocol multimedia subsystem (“IMS”) emergency call can include sending a session initiation protocol (“SIP”) REGISTER request relating to an emergency registration to a proxy call session control function (“P-CSCF”) of an IMS network. The method can further include, responsive to sending the SIP REGISTER request, receiving a response from the P-CSCF. The method can further include, responsive to receiving the response, performing an action based on the response.

Abstract: A method performed by a core network node for handling a data service session in a packet communication network is provided. The packet communication network is configured to support fixed access between a User Equipment (UE) and an access network node. The core network node obtains a decision whether a monitored bandwidth over the fixed access is below a bandwidth requirement authorized to the UE. The bandwidth over the fixed access is monitored for a data service session between the UE and the Data Network via the fixed access. The core network node obtains a decision of how to handle the data service session based on the decision whether the monitored bandwidth over the fixed access is below the bandwidth requirement.

Abstract: A method for operating a mobile entity in a mobile communications network having at least one slice is provided. The slice of the mobile communication to which the mobile entity intends to connect is determined. Additionally, whether a relationship can be identified in the mobile entity is determined. The relationship indicates whether the slice to which the mobile entity intends to connect is related to an access point of the that slice. A request message is then transmitted to a radio access network (RAN) of the mobile communications network that includes the identified relationship.

Abstract: A method for registering a User Equipment, UE, with low access priority in an Internet Protocol based Multimedia Subsystem, IMS, network said method comprising the steps of receiving, by a Proxy-Call Serving Control Function, P-CSCF node comprised by said IMS network, a Session Initiation Protocol, SIP, Register message for registering said UE in said IMS network, determining, by said P-CSCF node, that said SIP Register message comprises an indication that said UE is using a low access priority, wherein said low access priority indicates at least a reduced priority for said UE for accessing network resources, and establishing, by said P-CSCF node, said registration of said UE with said determined low access priority indication. Complementary methods and devices for performing a method according to the invention are also presented herein.

Abstract: System comprising a mobility management entity, MME (103), a first Radio Access node, RAN (102, eNB) offering Long Term Evolution, LTE, access, and a second radio access node, RAN (108, gNB) offering New Radio, NR, access; a user entity, UE (101), supporting both Long Term Evolution, LTE, and New Radio, NR, Radio Access Technology, RAT. The MME (103) is resolving (74) a Radio Access Technology restriction information, RAT RI, from the at least two instances of RAT RI pertaining to restrictions for a UE as to support dual connectivity over LTE access and NR access respectively for a Packet Data Network, PDN, connectivity session. The first RAN (102) is receiving (75) the resolved RAT RI and is enforcing (77) bearer setup in accordance with the resolved RAT RI.

Abstract: A method in a proxy call session control function, P-CSCF, of handling an unauthenticated emergency call originating from a roaming user equipment, UE, which is not attached to the P-CSCF. The P-CSCF receives a SIP INVITE request from the UE, the INVITE request relating to the unauthenticated emergency call, and determines an IP address of the UE. The P-CSCF sends an identity query to a policy and charging rules function, PCRF, indicating the IP address of the UE and requesting other identifiers of the UE, and receives one or more other identifiers of the UE from the PCRF. The P-CSCF constructs a TEL and/or SIP uniform resource identifier, URI, for the UE on the basis of at least one of said other identifiers, inserts the URI into the SIP INVITE request, and sends the SIP INVITE request to a public safety answering point, PSAP. Also provided are corresponding methods in other nodes and for authenticated emergency calls, and apparatus for implementing the methods.

Abstract: A method performed by a network node for enabling communication with a wireless device via a radio network node in a communication network, which network node supports a first set of functionalities out of a total set of functionalities in a core network of the communication network. The first set of functionalities belongs to a first network slice of the core network, and is separated from another set of functionalities out of the total set of functionalities in the core network. The network node initiates a transmission of an indication, during a connection setup for the wireless device, to the radio network node, which indication indicates the supported first set of functionalities.

Abstract: When a user equipment is roaming in a visited network, mid-call handover from VoWiFi to VoLTE is controlled by policies enforced in the user equipment and the home network. An inter-operator policy and a subscription policy are stored in the home network and a user equipment policy is stored in the user equipment. The roaming user equipment registers in a visited network. Later, when mid-call handover to VoLTE on the visited network is desired, and also permitted by its user equipment policy, the user equipment sends a request containing a call-specific identifier which the responsible network entity in the home network compares with the registered handover parameter having regard to the inter-operator and subscription policies. If compliance with the policies is found, then the mid-call handover is proceeded with.

Abstract: A node of a wireless communication network controls connectivity of a radio device to the wireless communication network. The connectivity is based on parallel usage of a first radio technology and a second radio technology. Depending on subscription data associated with the radio device, the node controls a restriction of scheduling of radio transmissions of the radio device for one of the first radio technology and the second radio technology.

Abstract: In an example aspect, a method performed by wireless device for communication establishment is provided. The method comprises, in response to a request for establishment of a communication with the wireless device using a first network, receiving a redirection instruction to redirect to a second network, and in response to whether a node in the second network supports communication with a node in the first network, selecting a first procedure or a second procedure for establishing the communication using the second network.

Abstract: There are provided mechanisms for supporting a Circuit Switched (CS) service in a 5G Core Network (5GCN). A method is performed by a wireless device. The method comprises registering with an Access and Mobility Management Function (AMF) of the 5GCN using Non-Access Stratum (NAS) signalling. The method comprises registering, with the 5GCN and using NAS signalling, for at least one CS service, wherein the registering for the at least one CS service is performed in conjunction with registering with the AMF.