Abstract: The present disclosure provides a method (300) in a Vertical Application Layer, VAL, server. The method (300) includes: transmitting (310), to a Network Resource Management, NRM, server, a monitoring event subscription request. The monitoring event subscription request contains: a list of identities, IDs, of one or more VAL users or VAL User Equipments, UEs, for which event monitoring is requested, or a VAL group ID of a group of one or more VAL users or VALUEs for which event monitoring is requested, and a monitoring profile ID corresponding to a list of one or more events to be monitored, or event details indicating a list of one or more events to be monitored. The method (300) further includes: receiving (320), from the NRM server, a monitoring event subscription response as a response to the monitoring event subscription request.

Abstract: The disclosure herein relate to vertical application in edge computing. A method performed by a first network function implementing Edge Enabler Server (EES) in an Edge Data Network (EDN). The method comprises receiving, from a second network function implementing Edge Application Server (EAS) in the EDN, a registration request message comprising information indicating a first list of associated EAS information. Based on the associated EAS information, the UE performs a joint EAS discovery and selection for vertical application in an edge deployment, thus both application enabler client in the UE and application specific server communicates with the same application enabler server.

Abstract: Embodiments of the present disclosure provide methods and apparatuses for location based group formation. A method performed by a group management server comprises receiving a location based group creation request from a group management client or a vertical application layer (VAL) server. The location based group creation request comprises location information and at least one VAL service identity (ID). The method further comprises obtaining information of at least one VAL user and/or at least one VAL user equipment (UE) corresponding to the location information. The method further comprises obtaining VAL service data of the at least one VAL user and/or the at least one VAL UE. The method further comprises creating a location based group matching the location based group creation request based on the VAL service data of the at least one VAL user and/or at least one VAL UE.

Abstract: The present disclosure provides a method in an Application Programming Interface ‘API’ Management Function, AMF. The method includes: transmitting, to a Common API Framework ‘CAPIF’ Core Function, CCF, a registration request or registration update request containing API Exposing Function, AEF, information on an AEF. The AEF information includes a status of the AEF.

Abstract: The disclosure herein relate to vertical application in edge computing. A method performed by a first network function implementing Edge Enabler Server (EES) in an Edge Data Network (EDN). The method comprises receiving, from a second network function implementing Edge Application Server (EAS) in the EDN, a registration request message comprising information indicating a first list of associated EAS information. Based on the associated EAS information, the UE performs a joint EAS discovery and selection for vertical application in an edge deployment, thus both application enabler client in the UE and application specific server communicates with the same application enabler server.

Abstract: The present disclosure provides a method (300) in a Vertical Application Layer, VAL, server. The method (300) includes: transmitting (310), to a Network Resource Management, NRM, server, a monitoring event subscription request. The monitoring event subscription request contains: a list of identities, IDs, of one or more VAL users or VAL User Equipments, UEs, for which event monitoring is requested, or a VAL group ID of a group of one or more VAL users or VALUEs for which event monitoring is requested, and a monitoring profile ID corresponding to a list of one or more events to be monitored, or event details indicating a list of one or more events to be monitored. The method (300) further includes: receiving (320), from the NRM server, a monitoring event subscription response as a response to the monitoring event subscription request.

Abstract: A method of controlling an application media session between at least two network entities, which comprises establishing a Session Initiation Protocol, SIP, session between each network entity and a SIP application server within the IMS and establishing a media session between each network entity and a Media Resource Function, MRF, controlled by the SIP application server. The method further comprises sending between the network entities, via the media sessions, control messages comprising application control protocol instructions.

Abstract: A Home Subscriber Server for handling IP Multimedia Subsystem subscriptions comprises means for maintaining associations between public user identities and Service Profiles, where two or more public user identities can be associated with a common Service Profile, and means for identifying to a network node all public user identities that are associated with a common Service Profile.

Abstract: A method of controlling an application media session between at least two network entities, which comprises establishing a Session Initiation Protocol, SIP, session between each network entity and a SIP application server within the IMS and establishing a media session between each network entity and a Media Resource Function, MRF, controlled by the SIP application server. The method further comprises sending between the network entities, via the media sessions, control messages comprising application control protocol instructions.

Abstract: The invention relates to a method of notifying an Application Function, AF, in a communications network of resource restrictions relating to a communications session. The network includes a Policy and Charging Rules Function, PCRF, for authorising and controlling flows of data in the session. In the method the AF sends an authorisation request to the PCRF for establishing the communication session. The authorisation request includes an indication that the AF is to be notified of resource restrictions for the data flows in the session. The PCRF notifies the AF of the resource restrictions.

Abstract: The invention relates to a method of changing allocation of Serving-Call Session Control Functions (S-CSCFs) to a user of an IMS network. The user is being provided with services via a first S-CSCF allocated to the user. The method includes implementing a re-allocation instruction at the first S-CSCF. The reallocation instruction includes criteria for de-allocation of the user from the first S-CSCF. The S-CSCF determines if the criteria are met; and if the criteria are met, de-allocates the user.

Abstract: A method of handling SIP requests received by an IP Multimedia Subsystem network. The method comprises determining whether or not the SIP destination identity is within a range of identities owned by an operator of the network but is currently unallocated to a subscriber or service of the network and, if yes, routing the message to one or more SIP application servers within the network and implementing service logic at the application server(s) specific to a network owned but unallocated SIP identity.

Abstract: A Home Subscriber Server for handling IP Multimedia Subsystem subscriptions comprises means for maintaining associations between public user identities and Service Profiles, where two or more public user identities can be associated with a common Service Profile, and means for identifying to a network node all public user identities that are associated with a common Service Profile.

Abstract: The invention relates to a method of notifying an Application Function (AF) in a communications network of resource restrictions relating to a communication session. The network includes a Policy and Charging Rules Function (PCRF) for authorizing and controlling flows of data in the session. In the method the AF sends an authorization request to the PCRF for establishing the communication session. The authorization request includes an indication that the AF is to be notified of resource restrictions for the data flows in the session. The PCRF notifies the AF of the resource restrictions.

Abstract: A Home Subscriber Server for handling IP Multimedia Subsystem subscriptions comprises means for maintaining associations between public user identities and Service Profiles, where two or more public user identities can be associated with a common Service Profile, and means for identifying to a network node all public user identities that are associated with a common Service Profile.

Abstract: A server, computer readable medium and method for accessing buddy data related to a first user (presentity) that is connected to a communication network that includes a server, the data being accessed by a second user (watcher) connected to the communication network. The method including storing, at a server, information associated with a plurality of users associated with the presentity as the buddy data, receiving, at the server, a request from a watcher for buddy data of the presentity, authorizing, at least in part by the server, the request for buddy data, and transmitting, by the server, the buddy information to the watcher.

Abstract: A protocol conversion gateway and a method therein for enabling a client, which client does not support a Session Initiation Protocol (SIP) transport protocol, to communicate with a SIP proxy are provided. The method comprises receiving a first SIP message, over a non-standard SIP transport protocol, from the client. The method further comprises inserting a SIP address of the protocol conversion gateway in at least one header of the received SIP message, and sending the SIP message to the SIP proxy over a standard SIP transport protocol.

Abstract: A method is provided for facilitating recovery from the failure of a P-CSCF within an IP multimedia Subsystem network. A gateway, such as a GGSN, monitors signals arriving at the gateway from the P-CSCF and provides an indication if the monitored signals become unacceptable, for example because of an interruption in the signals. The gateway responds by signalling the unavailability of the P-CSCF to user equipment, which was associated with the P-CSCF during a previous registration with the IMS network. In response, for example, the user equipment affected by the failure may request re-registration with the IMS network using a different available P-CSCF.

Abstract: An originating P-CSCF node receives a SIP INVITE request from first user equipment (UE) that originates a call to a second UE. If a relay candidate address for the first UE is not present in the SIP INVITE request, the SIP INVITE request is modified to include a first address provided by an originating IMS-AGW node as a relay candidate for the first UE and forwarded to the second UE. The originating P-CSDF node receives a SIP INVITE response message from the second UE in response to the SIP INVITE request. If a relay candidate address for the second UE is not present in the SIP INVITE response, the SIP invite response is modified to include a second address provided by an originating IMS-AGW node as a relay candidate for the second UE and forwarded t the first UE. The address information is used by both UEs in ICE operations.

Abstract: A method of registering or deregistering a user to or from an IP Multimedia Subsystem (IMS) network. A SIP Application Server (SIP-AS) performs a registration or deregistration with the IMS network on a user's behalf. The registration or deregistration is performed over one of the following interfaces: a Service Control Interface (ISC) with a Serving Call State Control Function (S-CSCF), a Gm interface with a Proxy CSCF (P-CSCF), or an Ma interface with an Interrogating CSCF (I-CSCF).