Abstract: According to an embodiment, a method for use in a wireless device is provided. The method comprises waking up from a discontinuous reception (DRX) mode in a cell. The method further comprises determining whether the cell is the same as a previous cell of the wireless device. In response to determining that the cell is not the same as the previous cell, the method further comprises determining whether the wireless device missed a wake-up signal opportunity in the cell. The method further comprises monitoring each of the paging occasions associated with the wake-up signal opportunity if the cell is not the same as the previous cell and the wake-up signal opportunity was missed.

Abstract: A method for indicating and operating multiple User Equipment (UEs) in a wireless device is provided. In embodiments disclosed herein, the wireless device can recognize that there exist multiple UEs in the wireless device and determine a relation between the multiple UEs in the wireless device. Accordingly, the wireless device can provide an indication to a network node (e.g., a base station) to indicate the determined relation between the multiple UEs. The network node, one the other hand, can cause the wireless device to perform one or more actions (e.g., paging, handover, etc.) based on the indicated relation between the multiple UEs in the wireless device. By being able to determine and indicate the multiple UEs in the wireless device and perform network operations accordingly, it is possible to enhance convenience, flexibility, mobility, and basic economics of the wireless device, thus helping to improve subscriber experience.

Abstract: According to certain embodiments, a network node is operable to change a general packet radio service (GPRS) tunneling protocol (GTP) tunneling endpoint identifier (TEID) when a user equipment (UE) resumes a connection to a core network. The network node comprises processing circuitry operable to receive a resume request from a UE; determine that the UE was previously connected to the network node prior to the resume; obtain one or more GTP TEIDs that are different than GTP TEIDs that were used when the UE was previously connected to the network node; and transmit an indication of the one or more GTP TEIDs to the core network. Transmitting the indication to the core network may comprise a path switch procedure, a UE context resume procedure, or a radio access bearer modification procedure.

Abstract: Systems and methods are disclosed herein that relate to actions performed by a Radio Access Network (RAN) when redundancy is not available. In this regard, embodiments of a method performed by a RAN node are disclosed. In one embodiment, a method performed by a RAN node for RAN action when redundancy is not available comprises receiving, from a core network node, a request for a set of User Plane (UP) resources in the RAN. The method further comprises determining whether the request for the set of UP resources in the RAN can be met and sending, to the core network node, a response to the request for the set of UP resources that is based on whether the request for the set of UP resources in the RAN can be met.

Abstract: Methods may be provided to operate a wireless terminal in communication with a base station. Such methods may include receiving a Radio Resource Control RRC message from the base station, wherein the RRC message includes information regarding at least one Quality of Service, QoS, flow being reflective and/or non-reflective. Such methods may also include providing communication of a data packet between the wireless terminal and the base station using a non-reflective QoS flow, wherein the data packet includes a data field and a Service Data Application Protocol SDAP header field with a QoS Flow Identity QFI, and wherein the QFI is used for the data packet based on the information from the RRC message. Methods of operating base stations and core network nodes may also be provided. Related wireless terminals, base stations, and core network nodes are also discussed.

Abstract: Systems and methods for handling a wireless device in a Configuration Management (CM)-Connected state with Radio Resource Control (RRC) Inactive state are provided. In some embodiments, a method for performing a mobility transfer from a Fifth Generation network to an Evolved Packet System (EPS) network includes a 5G network node: receiving, from an EPS network node, a context request for context associated with a User Equipment (UE); determining data forwarding information associated with the UE; and sending, to the EPS network node, a context response comprising context information associated with the UE and data forwarding information associated with the UE. In this way, packet losses will be minimized leading to improved end user performance.

Abstract: The present invention relates to PDU session management and in particular methods and devices for establishing user plane resources for PDU sessions. This is realized in a number of embodiments such as methods and devices for an infrastructure node and user equipment node. For instance in a method for Protocol Data Unit, PDU, session management, with steps of receiving, at an Access and Mobility Management function entity, AMF, a registration request message transmitted by a user equipment, UE, wherein the registration request message comprises information indicating that one or more PDU sessions require user plane, UP, resources and identifying each of the PDU sessions that require UP resources, and in response to receiving the registration request message, the AMF transmitting to a session management function, SMF, a UP resource request message for requesting the SMF to establish UP resources for at least one of the PDU sessions that requires UP resources.

Abstract: A radio network node (12) in a radio access network (RAN1) and a method therein for Paging Policy Differentiation (PPD). The radio network node receives from a core network (CN1) a Downlink (DL) Protocol Data Unit (PDU) associated with a wireless device (10). The DL PDU is comprised in a Quality of Service (QoS)-flow, is originated from a respective service and comprises a Paging Policy Indicator (PPI) associated with the respective service. The radio network node extracts the PPI by means of a Central Unit User Plane (CU-UP) (12b). By means of the CU-UP (12b), the radio network node informs a Central Unit Control Plane (CU-CP) (12a) about the PPI. Further, by means of the CU-CP, the radio network node triggers paging of the wireless device. Furthermore, the radio network node pages the wireless device (10) according to the PPI associated with the respective service.

Abstract: A technique for selectively initiating a handover from a source system (510) comprising a first core network, CN, (512) and a first radio access network, RAN, (516) to a target system (530) comprising a second CN (532) and a second RAN (536) is described. As to a method aspect of the technique, it is determined if a control plane interface (520) for the handover is available between the first CN (512) and the second CN (532). Depending on the availability of the control plane interface (520), the handover is selectively initiated.

Abstract: According to an aspect, a network node operating in a first RAN according to a first RAT is the target of an inter-RAT (IRAT) handover. The network node receives a handover request for a user equipment from a cell in a second RAN operating according to a second RAT. After handover of the user equipment to a cell in the first RAN is completed, the network node configures the user equipment to measure one or more frequencies corresponding to the second RAN. Based on measurements reported by the user equipment for the one or more frequencies, the network node identifies one or more detected cells exceeding a measurement threshold, and sends a handover report towards the second RAN. The handover report includes, for at least one detected cell exceeding the measurement threshold, a physical cell identifier for the detected cell and a frequency identifier for the detected cell.

Abstract: Systems and methods related to conveying Time Sensitive Networking (TSN) synchronization information within a cellular communication system (e.g., a Fifth Generation System (5GS)) are disclosed. In one embodiment, a method performed by a User Equipment (UE) in a cellular communications system or a TSN Translator (TT) associated with the UE comprises receiving, from a TSN end station, a Precision Time Protocol (PTP) or generalized PTP (gPTP) announce message comprising information that identifies one or more clock domains for which the TSN end station desires to receive PTP or gPTP messages. The method further comprises sending, to a core network node in the cellular communications system, either: (a) the information that identifies the one or more clock domains extracted from the PTP or gPTP announce message or (b) the PTP or gPTP announce message. Using this information, UE specific PTP or gPTP message filtering may be applied.

Abstract: According to some embodiments, a method for use in a wireless device of acquiring system information associated with a core network comprises receiving system information from a network node. The network node is connected to one or more core networks. The system information includes an indication of a network type (e.g., enhanced packet system (EPS), fifth generation system (5GS), etc.) for each core network. The method further comprises determining a capability of the wireless device for connecting to the plurality of network types, and determining whether to connect to a core network based on the network type and the capability of the wireless device. In particular embodiments, the indication of the network type comprises a list of public land mobile networks (PLMNs) connected to the network node and an indication of network types supported by each PLMN.

Abstract: Methods of operating a network node in a cell of a wireless communication network are provided. Methods include broadcasting, to a user equipment, UE, a first network list that includes multiple public network identifiers that correspond to public networks in the cell, and broadcasting, to the UE, a second network list that includes multiple non-public network, NPN, identifiers that correspond to NPNs in the cell. Each of the public network identifiers and NPN identifiers includes multiple data fields. The network identifiers include a mobile country code, MCC, a mobile network code, MNC and at least one of a control access group, CAG, and a network identifier, NID.

Abstract: According to some embodiments, a method for use in a core network node comprises: obtaining a mapping of core network (CN) slice identifiers to radio access network (RAN) slice identifiers; receiving a slice registration request from a user equipment (UE); determining a slice identifier associated with the slice registration request; and sending a slice registration response to the UE. The slice registration response includes the determined slice identifier. According to some embodiments, a method for use in a network node comprises obtaining a mapping of CN slice identifiers to RAN slice identifiers. The method may further comprise receiving a connection request from a UE that includes a network slice identifier; determining a RAN slice identifier based on the network slice identifier; and applying a policy of a network slice associated with the determined network slice identifier to the requested connection.

Abstract: Embodiments herein relate to a method performed by a distributed unit of a network node, for establishing a connection between the distributed unit and a central unit connected to a core part of the wireless network. The network node includes the central unit and at least the distributed unit. The distributed unit performs a Domain Name Server lookup for a proxy central unit, which will act as a temporary or initial central unit with regard to a configuration transfer procedure. The distributed unit further receives an ip address of the proxy central unit and initiates the configuration transfer procedure by sending a configuration transfer message to the ip address of the proxy central unit. The distributed unit further receives an ip address of the central unit and establishes a connection between the distributed unit and the central unit using the received ip address of the central unit.

Abstract: A Radio Network Node (RNN) and a method therein for providing improved robustness of a radio link between the RNN and a wireless device. The RNN and the wireless device operate in a communications network. The RNN transmits, towards the wireless device, a transmission with a first transmission mode associated with a first level of coverage extension. When a first period of time has elapsed, the RNN transmits, towards the wireless device, the transmission using a second transmission mode associated with a second level of coverage extension. The second level of coverage extension is higher than the first level of coverage extension.

Abstract: Avoiding transmission of unnecessary 5G session management (SM) messages in a cellular communications system is disclosed. In one embodiment, a method performed by a Session Management Function (SMF) comprises determining that a non-access stratum (NAS) message carrying a Protocol Data Unit (PDU) session establishment accept indication was not sent to a user equipment (UE) by a radio access network (RAN). The method further comprises, responsive to determining that the NAS message carrying the PDU session establishment accept indication was not sent to the UE, sending a PDU session establishment reject indication to the UE. In some embodiments, determining that the NAS message carrying the PDU session establishment accept indication was not sent to the UE comprises receiving an Nsmf_PDUSession_UpdateSMContext request comprising a cause, and determining that the NAS message carrying the PDU session establishment accept indication was not sent to the UE based on the cause.

Abstract: Embodiments include methods, performed by a first radio network node (RNN) in a wireless network, to establish a communications interface with a second RNN in the wireless network. Such methods include receiving, from a third RNN in the wireless network, a Transport Network Layer (TNL) address associated with the second RNN. The first and third RNNs are configured for wireless communication with wireless devices via an E-UTRA radio access technology (RAT), and the second RNN is configured for wireless communication via an NR RAT. The third RNN can be a proxy node for discovery of TNL addresses associated with a plurality RNNs configured for wireless communication via the NR RAT. Such methods include establishing the communications interface with the second RNN based on the TNL address received from the third RNN. Other embodiments include complementary methods performed by a second RNN, and RNNs configured to perform such methods.

Abstract: A method in a target network node and a corresponding network node, for performing secure Mobile Terminated (MT) early data transmission (EDT) is provided. The method may comprise: sending a paging message to the wireless device, which has been suspended from a connection with a second network node, the paging message comprising an early data transmission (EDT) indication; receiving a random access preamble from the wireless device; obtaining context information of the wireless device; and resuming a data connection with the wireless device based on the context information.

Abstract: According to an embodiment, a method for use in a wireless device is provided. The method comprises waking up from a discontinuous reception (DRX) mode in a cell. The method further comprises determining whether the cell is the same as a previous cell of the wireless device. In response to determining that the cell is not the same as the previous cell, the method further comprises determining whether the wireless device missed a wake-up signal opportunity in the cell. The method further comprises monitoring each of the paging occasions associated with the wake-up signal opportunity if the cell is not the same as the previous cell and the wake-up signal opportunity was missed.