Abstract: A method of operating a wireless device (300) is described. The method includes providing (1001) a connection with a source access node. The method also includes receiving (1005) a handover command from the source access node while providing the connection with the source access node. The method also includes establishing (1009) a connection with a target access node responsive to receiving the handover command. The method further includes transmitting (1019) uplink data to the source access node after establishing the connection with the target access node. Related wireless devices are also discussed.

Abstract: A wireless device, a network node, a core node and methods therein, for managing reachability of the wireless device. The wireless device starts an AS (Access Stratum) reachable timer when entering an inactive state. If the AS reachable timer expires while still in the inactive state, the wireless device sends to the network node a reachable notification indicating that the wireless device is reachable. If entering a connected state before the AS reachable timer expires, the wireless device stops the AS reachable timer when changing from the inactive state to a connected state. If the core node receives from the network node a not reachable notification indicating that the wireless device is not reachable, the wireless device can be marked as not reachable via paging.

Abstract: According to certain embodiments, a method performed by the wireless device comprises sending data packets using a first QoS-flow to DRB mapping; receiving a new mapping; and sending an SDAP end marker indicating that the wireless device is applying the new mapping. Also disclosed is a wireless device configured to perform the method.

Abstract: Systems, methods, and apparatus for reporting a Downlink Data Delivery Status (DDDS) are disclosed herein. An example method includes a network node generating a DDDS frame including an indicator that a highest transmitted Packet Data Convergence Protocol (PDCP) Packet Data Unit (PDU) sequence number is present in the DDDS frame, an indicator that a highest successfully delivered PDCP PDU sequence number delivered is present in the DDDS frame, a desired buffer size for a data bearer, the highest transmitted PDCP PDU sequence number, and the highest successfully delivered PDCP PDU sequence number. The network node provides the DDDS frame to a second network node.

Abstract: A method for a transfer of a UE context within a secondary network from a source secondary network node to a target secondary network node. The UE is served by a master network node and the source secondary network node. The method includes the following steps performed by the UE: receiving a first message indicative of a secondary network node measurement configuration; based on the measurement configuration, performing measurements of potential candidates for a target secondary network node; and sending a second message comprising a measurement report indicative of the measurements of potential candidates for a target secondary node.

Abstract: Methods performed by base stations and wireless devices in networks are disclosed. A method performed by a base station comprises: initiating a QoS-flow to DRB remapping; informing a target base station that the remapping is ongoing; and providing the target base station an old and a new QoS-flow to DRB mapping, wherein the old mapping was in place before the remapping, and the new mapping will be in place after the remapping. Another method performed by a base station comprises: receiving an indication from a further base station that QoS-flow to DRB remapping is ongoing; receiving an old and a new QoS-flow to DRB mapping from the further base station; and receiving signals from a wireless device using the old and new QoS-flow to DRB mappings. A method performed by the wireless device comprises: sending data packets using a first QoS-flow to DRB mapping; receiving a new mapping; and sending an SOAR end marker, indicating that the wireless device is applying the new mapping.

Abstract: A method performed by a first core network entity. The method comprises receiving a first user plane release request message from a radio access network entity or a second core network entity. The first user plane release request message comprises a request for a downlink tunnel associated with unicast of user plane data for one or more wireless devices in a multicast or broadcast session to be released. The method further comprises sending a second user plane release request message to a third core network entity. The second user plane release request message comprises a request for the downlink tunnel associated with unicast of user plane data for one or more wireless devices in a multicast or broadcast session to be released.

Abstract: A method performed by a User Equipment, UE, is provided. The UE receives (s302) a first message comprising a group identifier, ID, allocated for a particular multicast-broadcast services, MBS, session. While camping on radio access network, RAN, node that does not support MBS services and while being in a radio resource control, RRC, state other than RRC_CONNECTED, the UE receives (s304) from the RAN node a paging message. The UE determines (s306) whether the paging message comprises the group ID.

Abstract: A method for a transfer of a UE context within a secondary network from a source secondary network node to a target secondary network node. The UE is served by a master network node and the source secondary network node. The method includes the following steps performed by the UE: receiving a first message indicative of a secondary network node measurement configuration; based on the measurement configuration, performing measurements of potential candidates for a target secondary network node; and sending a second message comprising a measurement report indicative of the measurements of potential candidates for a target secondary node.

Abstract: The present application generally relates to wireless communication technology. More particularly, the present application relates to a method and apparatus for providing service continuity for Multicast and Broadcast Service (MBS). The present application also relates to computer program product adapted for the same purpose. According to one embodiment of the present application, a method in a first RAN node for providing service continuity for Multicast and Broadcast Service (MBS) comprises: receiving (510) from a UE a request for retransmitting one or more missing Packet Data Units (PDUs) in MBS data associated with an MBS session previously transmitted from a second RAN node to the UE; and handling (520) retransmission of the missing PDUs based on the request.

Abstract: A method, system and apparatus are disclosed. According to one or more embodiments, a network node including a target central unit, CU, the target CU including a CU-CP, and a CU-UP, that are in communication with each other via at least one interface is provided. The network node configured to identify a handover request associated with an inter-system handover, determine a configuration for the CU-UP to one of add and omit a service data adaptation protocol, SDAP, header for at least one inter-system data packet that is to be transmitted to a wireless device and cause transmission of at least one message over the interface where the at least one message configured to initiate a bearer context procedure, indicate that the bearer context procedure is associated with the inter-system handover, and indicate the configuration of the CU-UP.

Abstract: A method performed by a first network node for handling Quality of Service, QoS, parameters for respective first and second radio resources to be provided to a User Equipment, UE, in Multi Radio access technology—Dual Connectivity. The first network node sends (502) a first indication to the second network node. The first indication indicates a first set of downgraded QoS levels and their respective one or more QoS parameters currently supported in the first network node. The first network node receives (503) a second indication from the second network node. The second indication indicates the second set of downgraded QoS levels and their respective one or more QoS parameters currently supported in the second network node. The first network node decides (504) one or more QoS parameters for the first radio resources to be provided to the UE from the first network node in the MR-DC.

Abstract: A network node (300a) receives, over an interface between the network node (300a) and a further network node (300b), a message comprising paired user equipment (UE) identifiers for UE identification over the interface to the network node (300a) and further network node (300b), respectively. Responsive to determining that the identifier for UE identification to the network node (300a) uniquely identifies a UE (150) to the network node (300a), the network node (300a) validates the message irrespective of whether the identifier for UE identification to the further network node (300b) uniquely identifies the UE (150) to the further network node (300b).

Abstract: Systems and methods for session continuity of Multicast Broadcast (MB) Sessions are provided. In some embodiments, a method performed by a base station for session continuity of MB Sessions includes at least one of: providing at least one MB Session to a wireless device connected in 5G; determining that the wireless device is handed over to a target Next Generation Radio Access Network (NG-RAN); and providing session continuity of the at least one MB Session to the wireless device. In some embodiments, being handed over to the target NG-RAN comprises an Xn handover. In some embodiments, being handed over to the target NG-RAN comprises a N2 handover. Some embodiments of the current disclosure provide support for Multicast Broadcast Session continuity (aka “Handover”) at Inter-gNB Xn Handover and Inter-gNB N2 Handover in the 5G NR radio access.

Abstract: According to some embodiments, a method performed by a wireless device operating in a non-terrestrial network (NTN) comprises receiving a first tracking area identity (TAI) from a first cell. The first cell is an earth moving cell and the first TAI is associated with a first fixed tracking area. The method further comprises receiving a second TAI. The second TAI is associated with a second fixed tracking area. The method further comprises determining whether the wireless device should notify a network node of a tracking area update based at least in part on information related to the second TAI, and upon determining the wireless device should notify the network node of the tracking area update, transmitting a tracking area update.

Abstract: According to some embodiments, a method performed by a network node comprises: mapping a first cell identifier associated with the network node to a second cell identifier associated with a first geographical coverage location of a beam transmitted by the non-geostationary satellite; broadcasting the first cell identifier to one or more wireless devices in the first geographical coverage location; and transmitting the second cell identifier to a core network node as part of location information for one of the one or more wireless devices in the first geographical coverage location.

Abstract: A method for a transfer of a UE context within a secondary network from a source secondary network node to a target secondary network node. The UE is served by a master network node and the source secondary network node. The method includes the following steps performed by the UE: receiving a first message indicative of a secondary network node measurement configuration; based on the measurement configuration, performing measurements of potential candidates for a target secondary network node; and sending a second message comprising a measurement report indicative of the measurements of potential candidates for a target secondary node.

Abstract: Systems and methods are provided herein for handling Quality of Service (QoS) mobility and dual connectivity. In some embodiments, a method of operation of a network node in a cellular communications network includes deciding to split an existing Protocol Data Unit (PDU) session that includes a current uplink tunnel information; and setting up resources for the split PDU session. In this way, it may be possible to support QoS mobility in the different tunnel during dual connectivity. In some embodiments, the network node is a Master Next Generation—Radio Access Network (NG-RAN) node, and setting up resources for the split PDU session includes sending an S-Node Addition/Modification Request including the current uplink tunnel information for the split PDU session to a Secondary NG-RAN node in the cellular communications network; and receiving a newly added additional downlink tunnel information from the Secondary NG-RAN node.

Abstract: There is provided a method for managing a quality of service (QoS) in a telecommunications network. The method is performed by a first network node of the telecommunications network. If the first network node is unable to fulfil a first QoS indicated in a least preferred alternative QoS profile of one or more alternative QoS profiles, a first message is signalled to a core network node. The first message comprises a first indication that indicates that the first network node is unable to fulfil the first QoS indicated in the least preferred alternative QoS profile.

Abstract: The invention refers to a transfer of a User Equipment, UE, context within a secondary network from a secondary network node (110A) to a new secondary network node (110B), wherein the UE (105) is served by a master network node (120) and the secondary network node (110A), the method comprising: the UE receiving a first message (1202) indicative measurement configuration constructed by the secondary network node (110A); the UE performing, based on the measurement configuration, measurements of potential candidates for anew secondary network node (110B); and the UE sending a second message (1203) comprising a measurement report indicative of the measurements of potential candidates for the new secondary node.