Abstract: A method and device for power savings on a dormant secondary cell group are disclosed. In an approach, a wireless transmit receive unit (WTRU) may receive, from a network, a report configuration to report a channel quality indicator to a master cell group, MCG, or a secondary cell group, SCG, based on the received configuration (e.g. comprising different periodicities in order to report the CQI). In an approach, the channel quality indicator may be transmitted with a decreasing regularity. In an approach, the channel quality indicator may be transmitted with a period (periodicity) that depends on a discontinuous reception status of the MCG. In an approach, the channel quality indicator may be transmitted depending on a presence of high priority data (e.g. number of DCIs received, preemption indication, LCH priority; PDCCH).

Abstract: Embodiments of the present disclosure include methods, performed by a first node in an integrated access backhaul (IAB) network, for flow control of data transmission from a base station to a plurality of user equipment (UEs) via the IAB network. Such embodiments can include detecting a reduction in data transmission throughput in the first node, and determining that the reduction in data transmission throughput is due to congestion in one or more particular downstream nodes in the IAB network. Such embodiments can also include sending a flow-control message to an upstream node in the IAB network, wherein the flow-control message identifies one or more nodes, in the IAB network, for which a flow-control operation is requested in relation to data transmitted from the upstream node. Other embodiments include complementary methods performed by a second node (e.g., upstream from the first node) and IAB nodes configured to perform such methods.

Abstract: A method is performed by a wireless device for transmitting PDCP packets over a multi-hop path to a receiver, in accordance with particular embodiments. The method begins with receiving PDCP signalling indicating that at least one transmitted PDCP packet has not been received. For example, the PDCP signalling may comprise a PDCP status PDU, or may comprise PDCP data recovery or PDCP re-establishment RRC signalling. In response to receiving the PDCP signalling indicating that at least one transmitted PDCP packet has not been received, the wireless device retransmits the at least one transmitted PDCP packet that has not been received, even if said transmitted PDCP packet has been acknowledged by a lower protocol layer. A method is also performed by a network node in accordance with particular embodiments.

Abstract: A method, system and apparatus are disclosed for preventing reestablishment at descendant nodes with no alternative paths in Integrated Access Backhaul (IAB) networks. In one embodiment, a method implemented in a network node configured to communicate with at least one descendant node over a backhaul network includes transmitting an indication to the at least one descendant network node in which the indication is associated with a radio link failure; and receiving at least one message in response to the indication, the at least one message being associated with an alternative path availability of the at least one descendant network node toward a third network node.

Abstract: Embodiments include methods by a user equipment (UE) configured for dual connectivity with a master node providing a master cell group that includes a primary serving cell (PCell) and with a secondary node providing a secondary cell group that includes a primary secondary cell (PSCell). Such methods include detecting a radio link problem associated with a first serving cell, wherein first serving cell is the PCell or the PSCell. Such methods include, in response to detecting the radio link problem, for each of the UE's split radio bearers that has a primary path set to a first cell group that includes the first serving cell, performing a recovery procedure such that all uplink data transmission for the split radio bearer occurs only via a secondary path that does not include the first serving cell. Embodiments also include complementary methods performed by network nodes, as well as UEs and network nodes.

Abstract: Methods and apparatus are provided for handover of a UE from a source node connected to a first core network to a target node connected to a second core network. The UE receives, from the source node, a mobility command including an indication of the radio access technology (RAT) used by the target node and a message container containing configuration information for the target node. The UE further determines, based on the indication of the RAT used by the target node, whether to treat the handover as an inter-RAT handover or as an intra-RAT handover with a core network change, and performs a radio resource control procedure for one of an inter-RAT handover or an intra-RAT handover with a core network change based on the determination.

Abstract: A method performed by a user equipment, UE, for handling communication in a wireless communication network, providing dual connectivity, DC, communication through a master node using a master cell group, MCG, over a first radio interface between the UE and the master node and through a secondary node using a secondary cell group, SCG, over a second radio interface between the UE and the secondary node. The UE detects a failure associated with the SCG and suspends actions associated with the SCG. The UE further performs a reconfiguration of the SCG in case the UE has received a MCG radio resource control, RRC, message comprising SCG configuration, wherein performing the reconfiguration of SCG comprises applying the reconfiguration; and resuming or not resuming the actions associated with the suspended SCG.

Abstract: A radio network equipment central unit (20, 1700) receives a message (15) that indicates an update to a transport layer address of a radio network equipment distributed unit (10, 1600) from an old transport layer address (12A) to a new transport layer address (12B). The message (15) indicates the old transport layer address (12A) and indicates the new transport layer address (12B). The message (15) may be received from the radio network equipment distributed unit (10, 1600), or from a distributed unit of an integrated access backhaul donor. Regardless, for each of multiple user plane bearers or transport layer tunnels that are associated with the old transport layer address (12A), the radio network equipment central unit (20, 1700) may update a transport layer address of that bearer or tunnel from the old transport layer address (12A) to the new transport layer address (12B).

Abstract: A method (400) for providing radio link failure (RLF) information. The method includes a UE (302) detecting (s402) an RLF with respect to a master cell group (MCG). The method also includes, in response to detecting the RLF with respect to the MCG, the UE either storing an RLF report and initiating a fast MCG link recovery procedure (s404) or transmitting an enhanced MCG failure information message as part of the fast MCG link recovery procedure.

Abstract: A method where a first network node receives from a second network node a packet with a path identifier value in the header. A plurality of bearers associated with the path are determined based on the path identifier value and used to assign at least one resource to the packet before it is transmitted to a third network node based on the at least one resource.

Abstract: According to certain embodiments, a method performed by a wireless device (110) for measurement reporting includes sorting a plurality of measurements for a measurement report based on at least one measurement quantity. The method further includes reporting, to a network node (160), measurement information selected from the plurality of measurements sorted based on the at least one measurement quantity.

Abstract: According to some embodiments, a method performed by a wireless device capable of operating in dual connectivity with a first network node in a master cell group (MCG) and a second network node in a secondary cell group (SCG) comprises receiving a connection configuration message from the first network node. The message includes parameters for setup or modification of the SCG. The method further comprises: storing parameters for synchronization or random access with the second network node; operating in dual connectivity with the first and second network nodes; storing configuration information about the second network node received via system information; receiving a connection release message from the first network node; receiving a connection resume message from the first network node; determining the message does not include a new or modified configuration for the SCG; and performing synchronization and random access with the second network node using the stored parameters.

Abstract: A method of operating a wireless device in a communication network includes receiving a message that indicates to the wireless device to enter a dormant state and that includes a configuration, determining that the wireless device is unable to comply with the configuration, and responsive to determining that the wireless device is unable to comply with the configuration, performing a recovery action. A method of operating a wireless network node includes sending an RRC release message instructing a wireless device to transition to a dormant state, the RRC release message including a configuration to be applied by the wireless device, and receiving a confirmation message indicating that the wireless device has properly applied the configuration, has not applied the configuration, or has partially applied the configuration. Related wireless devices and network nodes are disclosed.

Abstract: According to certain embodiments, a method in a wireless device is provided. The wireless device is currently connected to a first radio access node and configured with an s-measure by the first radio access node that controls when the wireless device starts performing measurements. Upon configuration by the first radio access node to perform measurements on a first radio access technology, RAT, the wireless device starts to perform the measurements when the first radio access node's s-measure criteria is fulfilled. Upon configuration by the first radio access node to perform measurements on a second RAT, the wireless device starts to perform the measurements on the second RAT whether the first radio access node's s-measure criteria is fulfilled or not.

Abstract: According to an example embodiment, a method of operating a node of a wireless communication network. An early measurement configuration is transmitted to a communication device. The early measurement configuration includes a received signal threshold for early measurement reports. A logged MDT measurement configuration is transmitted to the communication device. A release message is transmitted to the communication device. After transmitting the release message, a resume/setup message is transmitted to the communication device. After transmitting the resume/setup request message, a logged MDT measurement report is received from the communication device. The logged MDT measurement report includes a plurality of signal measurements for a respective plurality of frequencies, and the logged MDT measurement report includes the early measurement configuration. Related methods of operating a communication device, nodes, communication devices, and computer program products are also discussed.

Abstract: Embodiments include methods, by a first radio access network (RAN) node, for load balancing with a second RAN node. Such methods include receiving, from the second RAN node, one or more first indications related to resource aggregation capabilities for a plurality of cells served by the second RAN node. Such methods include determining one or more of the following based on the first indications: overall capacity available for offloading user equipment, UEs, to the plurality of cells; whether resources from the plurality of cells can be aggregated to meet service requirements of one or more UEs served by the first RAN node; and one or more UEs to be handed over to the second RAN node. Other embodiments include complementary methods by a second RAN node, as well as first and second RAN nodes configured to perform such methods.

Abstract: A method performed by a first base station, is described. The first base station determines a change in one or more measurements to be performed by a UE. The measurements are associated with a first set of frequencies. The first base station also transmits a first message to a second base station comprising information regarding which frequencies in the first set are to be changed. The first base station and the second base station serve the UE. A method performed by the second base station is also described whereby the second base station receives the first message. In a method performed by the UE, the UE receives, from the first base station, a configuration message configured to specify the measurements to perform and a measurement gap configuration. The UE then takes the measurements based on the configuration message.

Abstract: Methods performed by wireless device for filtering relevant early measurement results are provided. Operations of such methods include obtaining multiple idle/inactive measurement results while the wireless device is in an idle/inactive state and transitioning from the idle/inactive state to an active state. Operations may include, responsive to transitioning from the idle/inactive state to the active state, selecting a subset of the idle/inactive measurement results based on capabilities of frequencies associated with idle/inactive measurement results to be used by the wireless device. Operations may further include transmitting the subset of the idle/inactive measurement results to a network node in a wireless communication network.

Abstract: A wireless device (16) receives a control message (26) indicating a conditional configuration (28-1) that the wireless device (16) is to add, modify, or release for a link (20). The control message (26) includes configuration-specific information (30-1) that distinguishes the conditional configuration (28-1) from one or more other conditional configurations that are configurable for the link (20). The configuration-specific information (30-1) may for example includes a conditional configuration identifier that is unique at least among any conditional configurations configured for the link (20).

Abstract: According to some embodiments, a method performed by an integrated access and backhaul (IAB) donor control unit (CU) network node comprises obtaining a first mapping between a first traffic type and a first communication path. The first communication path is for communicating the first traffic type between the IAB donor CU network node and an IAB network node. The method further comprises transmitting the first mapping to the IAB network node.