Abstract: A radio device configures a radio connection between the radio device and a cellular network. The radio connection is registered for a cell area comprising at least a first cell and a second cell of the cellular network. Before a decision of the radio device to perform a change from the first cell to the second cell, the radio device determines a configuration which enables performing allocation of radio resources to the radio device via a control channel of the second cell. After the change of the radio device from the first cell to the second cell, the radio device resumes transmission on the radio connection by requesting allocation of radio resources of second cell based on the determined configuration.

Abstract: A method performed by a user equipment includes receiving, via a radio access network (RAN), a radio resource control (RRC) message indicating to transition from RRC_CONNECTED to RRC_INACTIVE. The RRC message includes a resume identifier. The user equipment performs a connection resume procedure that includes transmitting, to the RAN, an RRC connection resume request that includes the resume identifier and transmitting, to the RAN, an RRC resume complete message that includes an index of a selected public land mobile network (PLMN) identity.

Abstract: Systems and methods for redirecting Radio Resource Control (RRC) messages in a wireless system that uses Central Unit (CU)/Distributed Unit (DU) splitting and either network sharing or network slicing are disclosed. In some embodiments, a method performed by a shared Distributed Unit (DU) comprises receiving a RRC message from a User Equipment (UE) and sending a first DU-to-Central Unit (CU) message to a first CU, where the first DU-to-CU message comprises the RRC message. The method further comprises either obtaining an indication that the first CU is a wrong CU for the RRC message or determining that the first CU is a wrong CU for the RRC message. The method further comprises sending another DU-to-CU message to a second CU, where the other DU-to-CU message comprises the RRC message or a RRC message related to the RRC message.

Abstract: Systems, methods, and apparatus are disclosed for a user equipment. An example method performed by a user equipment includes establishing a connection to a Radio Access Network (RAN) via a first network node. Communications are provided over the connection using Signaling Radio Bearer 1 (SRB1) configured with a New Radio (NR) Packet Data Convergence Protocol (PDCP). After the connection is suspended, the user equipment receives a Radio Resource Control (RRC) connection re-establishment message from a second network node. The connection re-establishment message includes a radioResourceConfigDedicated information element (IE). The user equipment re-establishes the connection to the RAN by applying a Long-Term Evolution (LTE) PDCP configuration to SRB1, performing a radio resource configuration procedure in accordance with the radioResourceConfigDedicated IE, and sending an RRC connection re-establishment complete message to the second network node.

Abstract: Embodiments of the present disclosure relate to frequency or RAT selection based on slice availability. In one aspect, a core network function is provided for determining information for RAT and/or frequency selection based on knowledge of network slices and providing that information to a RAN node, which may provide that information to a UE. The information may be a RFSP index or other index parameter, which may be set based on subscription related information or other information. Slice knowledge may include knowledge of availability of network slices at the network, active slices for the UE, slices to which the UE is registered or connected, and/or slices to which the UE is allowed access. In another aspect, a RAN node performs mapping to mobility policies for UE active or idle mobility based on the determined information along with slice or subscription information provided by a CN node.

Abstract: Methods are provided for a User Equipment, UE, in NR RRC to revert back to an old security context if an RRC Resume procedure from an inactive state fails. In this way, any subsequent Resume attempts by the UE will derive new security keys from the old keys, which means that the keys and security context will be the same for each attempt. In this way, the security context in the UE will remain synchronized with the network security context, regardless of how many attempts the UE has performed (assuming the network does not change the security context when the Resume procedure fails). Alternatively, the UE may store the new security context it derives during the first Resume attempt, and then ensure that it is reused at subsequent Resume attempts.

Abstract: A method for inter-Radio Access Technology (RAT) handover comprises preparing, at a target node, a reconfiguration message based on that the target node is inter-RAT and intra-system to a source node, and sending, to the source node, the reconfiguration message for forwarding the reconfiguration message to a user equipment (UE). The reconfiguration message comprises configuration for reconfiguring lower layer at the UE and further keeps the UE from reconfiguring upper-layer configuration. The target node disclosed in the method prepares a reconfiguration message specific to different types of RAT combination and system between the source node and the target node to provide loss-less and in-order data delivery during and after the handover.

Abstract: According to certain embodiments, a target network node for communicating with a user equipment (UE) that was previously in communication with a source network node, comprises an interface operably coupled to processing circuitry. The interface is configured to receive a connection resume request from the user equipment, wherein the connection resume request comprises a resume identification associated with the source network node. The processing circuitry is configured to determine that the UE was previously in communication with the source network node. The interface is further configured to transmit the connection resume request to the source network node, receive a radio resource control (RRC) response from the source network node, and forward the RRC response to the UE.

Abstract: A method in a User Equipment (UE) of an Evolved Packet System (EPS) establishes a security key (K_eNB) for protecting Radio Resource Control/User Plane (RRC/UP) traffic exchanged with a serving eNodeB. The method comprises sending a Non-Access Stratum (NAS) Service Request to a Mobility Management Entity (MME), the request indicating a NAS uplink sequence number (NAS_U_SEQ). The method further comprises receiving an indication of the NAS_U_SEQ of the NAS Service Request sent to the MME, back from the MME via the eNodeB. The method further comprises deriving the K_eNB from at least the received indication of the NAS_U_SEQ and from a stored Access Security Management Entity-key (K_ASME) shared with said MME.

Abstract: A method in a network node includes obtaining a first identifier associated with resuming an inactive connection between a wireless device and a network. The method further includes receiving a second identifier from the wireless device. The second identifier is either the same as the first identifier or is associated with the first identifier. The method further including determining a location indicator based on the second identifier. The location indicator indicates a location within the network from which to obtain information associated with the connection. The method further including obtaining the information associated with the connection from the location indicated by the location indicator. The method further including using the information associated with the connection to facilitate resuming the connection between the wireless device and the network.

Abstract: An access node (111, 112) of a cellular network transmits an identifier (502, 505) enabling selection of access information from an access information table. The access information is applicable by a radio device (10) for accessing the cellular network. Further, the access node transmits (501, 504) timing information indicating a time of a next transmission of the access information table. Depending on the timing information, the radio device (10) may decide whether to switch to another carrier frequency or to wait on a currently used carrier frequency to receive the access information table.

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 by an integrated access backhaul (IAB) node in a radio network includes generating a delivery status that indicates a status of a data connection, the data connection has a logical interface connection to a central unit (CU) node, the logical interface connection of the data connection is not terminated at the IAB node, and transmitting the delivery status to the CU node. The data connection may be a radio bearer.

Abstract: A method in a wireless device comprises monitoring one or more aspects of signaling with a network for abnormal signals indicative of network jamming. The method comprises detecting, based on the monitored one or more aspects of signaling with the network, one or more abnormal signals indicative of network jamming.

Abstract: Embodiments of the present disclosure relate to frequency or RAT selection based on slice availability. In one aspect, a core network function is provided for determining information for RAT and/or frequency selection based on knowledge of network slices and providing that information to a RAN node, which may provide that information to a UE. The information may be a RFSP index or other index parameter, which may be set based on subscription related information or other information. Slice knowledge may include knowledge of availability of network slices at the network, active slices for the UE, slices to which the UE is registered or connected, and/or slices to which the UE is allowed access. In another aspect, a RAN node performs mapping to mobility policies for UE active or idle mobility based on the determined information along with slice or subscription information provided by a CN node.

Abstract: A relay node, configured for mapping end-user bearers to backhaul bearers for communications with a distributed unit, DU, of a donor base station, maps (2062) first end-user bearers to a first set of backhaul bearers for communications with the DU via a first mobile termination, MT, entity in the relay node, maps (2604) second end-user bearers to a second set of backhaul bearers for communications with the DU via a second MT entity in the relay node and exchanges (2606) data with the DU over the first and second sets of backhaul bearers, via the first and second MT entities, respectively.

Abstract: According to an aspect, a user equipment, UE, in a suspended state in a Radio Access Network, RAN, in response to expiration of a first timer, transmits an RRCResumeRequest message. The UE receives a reject message in response to the RRCResumeRequest message. In response to the reject message, the UE starts a second timer and subsequently transmits a further RRCResumeRequest message. The further RRCResumeRequest message is received by the network during a period bounded approximately by the lesser of a duration of the second timer and a period of the periodic UE event and the greater of the duration of the second timer and the period of the periodic UE event.

Abstract: According to an exemplary embodiment a method may be provided to operate a central unit, CU, node that is coupled with first and second distributed unit, DU, nodes. Communication is provided between the CU node and a mobile communication device through the first DU node over a first radio link between the first DU node and the mobile communication device. A message is received from the first DU node informing the CU node that the radio link is temporarily unavailable. Responsive to receiving the message, communication through the first DU node is suspended, wherein configuration of the first DU node to serve the mobile communication device using the first radio link is maintained. While suspending communication through the first DU node, communication may be provided through the second DU node over a second radio link between the second DU node and the mobile communication device.

Abstract: Configuring an adaptation layer in a relay node communicates with a central unit of a donor base station through a distributed unit of the donor base station comprises connecting to the donor base station, after establishing the connection, configuring an adaptation layer in a protocol stack for an MT part of the relay node, the adaptation layer providing for routing of incoming packets to one or more further relay nodes or to one or more user equipments, UEs, connected to the relay node and for mapping of those incoming packets to bearers, and, after configuring the adaptation layer for the MT part of the relay node, configuring an adaptation layer for the distributed unit part of the relay node for forwarding packets exchanged between the central unit of the donor base station and the first further relay node downstream of the relay node.

Abstract: Embodiments herein relate to a method, performed by a User Equipment (UE) 120, for handling discontinous reception (DRX) operation. The method comprises applying a delay for at least one action performed as a response to data and/or signaling received by the UE during a predefined first time period after the UE 120 has entered an active state. Embodiments herein further relate to a method, performed by a network node 110, for handling discontinous reception (DRX) operation. The method comprises sending a configuration message to a User Equipment (UE) 120, which message comprises information regarding actions to be delayed by the UE 120.