Abstract: Embodiments include methods performed by a source node for handover of a user equipment (UE) from a source cell served by the source node in a wireless network. Such methods include transmitting, in the source cell according to a reference time delivery configuration, one or more messages that include respective reference times in relation to corresponding source cell transmission events. Such methods also include transmitting, to a target node in the wireless network, the reference time delivery configuration in relation to a request to handover the UE from the source cell to a target cell served by the target node. Other embodiments include complementary methods performed by the target node, as well as network nodes configured to perform such methods.

Abstract: A method for transmission reliability comprises receiving, from a first network node at a second network node, a message indicating that a first connection between the first network node and a terminal device has failed. The message comprises an indication to initiate a second connection with the terminal device from the second network node. The method further comprises establishing, at the second network node, the second connection with the terminal device based on the message. The second network node comprises a third connection established before the first connection failed. The first connection carries data transmitted in the third connection before the first connection failed, and the second connection carries data transmitted in the third connection after the first connection failed. The method for interference coordination utilizes duplicated transmissions to secure data transmission and to prevent data loss in an unexpected system failure.

Abstract: Embodiments herein relate to e.g. a method performed by a first communication device for controlling transmission of one or more data packets in a wireless communication network. The first communication device transmits an indication, to a second communication device, indicating one or more of the following: a maximum number of duplicates allowed to be transmitted for each data packet; type of duplication; a data radio bearer, DRB, for which duplication is configured; a radio link control, RLC, entity that is allowed to transmit a duplicate; an order of RLC entities in which the second communication device should transmit a first data packet and following duplicates; whether duplication is activated or deactivated for a DRB.

Abstract: Systems and methods are disclosed herein for handling an unknown Radio Resource Control (RRC) establishment cause value in a cellular communications system. In one embodiment, a method performed in a cellular communications system comprises, at a Radio Access Network (RAN) node in a RAN of the cellular communications system, receiving a RRC message from a User Equipment (UE) comprising an unknown establishment cause value and sending a message to a core network node, the message comprising an indication that the unknown cause value is included in the RRC message received from the UE. The method further comprises, at the core network node in a core network of the cellular communications system, receiving the message from the RAN node. In this manner, handling of an unknown RRC cause value over the interface between the RAN node and the core network node is enabled.

Abstract: A method, system and apparatus are disclosed for handling Quality-of-Service (QoS) updating during handover (HO). In one embodiment, a network node is configured to during a handover, HO, procedure associated with a wireless device, WD, receive a path switch request acknowledgement message comprising at least one first Quality-of-Service, QoS, parameter value associated with the WD; and as a result of the received path switch request acknowledgement message comprising the at least one first QoS parameter value, use at least one second QoS parameter value associated with the WD and send a notification, the notification indicating at least one of: that the at least one first QoS parameter value is not fulfilled, that a QoS parameter updating is not supported by the network node and that the QoS parameter updating failed.

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: Embodiments include methods for a first node that is configured for dual connectivity with a user equipment (UE) together with a second node of a wireless network. One of the first and second nodes provides a secondary cell group (SCG) for the UE. Such methods include a first unit of the first node receiving an indication of change in activation status of the SCG for the UE, and the first unit of the first node sending the indication of change in activation status to a second unit of the first node or to a first unit of the second node. Some variants include operations performed by the second unit of the first node. One of the first and second units can be a centralized unit (CU), while the other can be a distributed unit (DU). Other embodiments include first unit and first node apparatus configured to perform such methods.

Abstract: Methods and related user equipment and radio network node are described in which the UE receives a measurement configuration message via the radio network node, the measurement configuration message comprising a configuration identifier associated with a measurement configuration file, and in which the UE retrieves the measurement configuration file from the radio network node using the received configuration identifier.

Abstract: Methods supporting a Quality of Service (QoS) update during a Handover (HO) procedure are disclosed herein. More specifically, methods performed by a Radio Access Network (RAN) node and a Core Network (CN) node for supporting a QoS update during an HO are provided. The methods disclosed herein can facilitate flexible New Generation (NG)-RAN (NG-RAN) deployment with a mixture of NG-RAN nodes capable or incapable of supporting additional parameters in an HO procedure. The methods also make it possible to provide smooth NG-RAN software updates between different software releases.

Abstract: Embodiments include methods for a second node configured to serve a second cell in a wireless network. Such methods include receiving, from a first node, a mobility-related message including information associated with a plurality of first reference time information messages transmitted by the first node to a user equipment (UE). Such methods include, based on the received information, determining whether the second node can support reference time information delivery to the UE in the second cell. Such methods include, based on determining that the second node can support reference time information delivery to the UE, transmitting one or more second reference time information messages to the UE, each second reference time information message including an absolute reference time and a corresponding reference event within downlink transmissions by the second node. Other embodiments include complementary methods for the first node and network nodes configured to perform such methods.

Abstract: Embodiments include methods for a user equipment (UE) to synchronize timing with a wireless network. Such methods include receiving, from a first node serving a first cell in the wireless network, a first message that includes an absolute reference time and a corresponding reference event within downlink, DL, transmissions by the first node; and determining whether the UE received, from the first node, a timing adjustment value from which the UE can estimate a propagation delay of the DL transmissions. Such methods include, based on determining that the UE did not receive the timing adjustment value, performing one of the following: transmitting, to the first node, an indication that the UE did not receive the timing adjustment value; or declaring radio link failure with respect to the first cell and establishing a connection with a second cell capable of providing the information included in the first message.

Abstract: A technique for transmitting a control element, CE, for selectively activating and deactivating one or more secondary radio link control, RLC, entities configured for packet duplication in a radio communication between a radio device (504) and a radio access network, RAN is provided. The RAN comprises a first node (200; 100) and a second node (100; 200). The first node (200; 100) comprises a primary RLC (520) entity configured for the packet duplication and the second node (100; 200) comprises at least one of the one or more secondary RLC entities (522; 524; 526). As to a method aspect, a method comprises or initiates transmitting the CE from the RAN to the radio device (504), wherein the CE is indicative of an activity state of each of the one or more secondary RLC entities (522; 524; 526) configured for the packet duplication.

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: Methods and apparatuses are disclosed for location reporting. A mobility management node determines to establish a connection between the mobility management node and a terminal device for which location reporting is required. The mobility management node sends, to a base station, a request for establishing the connection. The request is configured to request the base station to report location information of the terminal device.

Abstract: According to an aspect, there is provided a method performed by a first core network, CN, node in a telecommunication network. The telecommunication network comprises a first radio access network, RAN, node that operates according to a first radio access technology, RAT. An update to a first security configuration between a wireless device and the first RAN node is required. The method comprises, after receiving a request from the wireless device for an emergency session so that the wireless device can establish an emergency call, initiating (901) an Emergency Service Fallback procedure to a second RAT.

Abstract: Methods and apparatuses are disclosed for location reporting. A mobility management node determines to establish a connection between the mobility management node and a terminal device for which location reporting is required. The mobility management node sends, to a base station, a request for establishing the connection. The request is configured to request the base station to report location information of the terminal device.

Abstract: A method of operating a UE to provide feedback on a streaming session. The method includes determining when a streaming session used by an application layer of the UE is being started and/or ended. Responsive to the determination, the method transmits an indication to a RAN that the streaming session is being started and/or ended. A corresponding method of operating a network node is provided to control reporting relating to streaming sessions of UEs. The method by the network node receives an indication from an UE that a streaming session is being started and/or ended, and controls whether a Quality of Experience (QoE) configuration file is sent to the UE responsive to the indication.

Abstract: Quality of Experience (QoE) Measurement collection is continued from a source network node (200) providing service to a terminal (210) to a target network node (200) following a SRNS relocation or inter-RAT handover of the terminal (210). When the source network node (200) is preparing for the transfer of a terminal (210) for which a QoE Measurement is configured, QoE Measurement parameters, which have been received by the source network node (200) from a first Measurement Initiating node (200), are sent from the source network node (200) to the target network node (200). The target network node (200) provides information about the handling of the ongoing QoE measurement to the source network node (200), e.g., whether the QoE measurement is to be continued or terminated. The source network node (200) updates to the first Measurement Initiating node (200) whether the target network node (200) will continue the QoE Measurement.

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.