Abstract: There are provided apparatuses, methods and computer program products. In accordance with an embodiment, there is disclosed a method comprising activating a secondary cell group provided by a secondary node co-operating with a master node for providing dual-connectivity communication resources for a user equipment. The activation is initiated either by the secondary node or the master node. Wherein when the activation is initiated by the secondary node a request is formed to activate the secondary cell group and the request is sent on a data radio bearer to the master node to be delivered to the user equipment for activation of the secondary cell group; and an activation indication is received from the user equipment. Wherein when the activation is initiated by the master node at least one message is received from the user equipment or from the master node; and initiation of the activation of the secondary cell group provided by the secondary node is determined based on the received at least one message.

Abstract: Systems, methods, apparatuses, and computer program products for protocol data unit (PDU) with service data unit (SDU) segment and indication of SDU-tail length. A method may include transmitting, to a network element, a radio link control data protocol data unit including a non-last segment of a service data unit. The protocol data unit may include an indication of a number of bytes of the service data unit that follow this segment in the service data unit.

Abstract: An apparatus of wireless communications comprising at least one processor, and at least one memory including computer program code, wherein the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus at least to: detect a radio link failure of a master cell group; suspend master cell group transmission for radio bearers, based on the detecting; and transmit or report a radio resource control indication over at least one of a signaling radio bearer between the apparatus and a secondary node, or a secondary cell group leg of a split signaling radio bearer.

Abstract: A method and apparatus may include configuring a split bearer. The split bearer is configured with a first data path between a user equipment and a first network node, and the split bearer is also configured with a second data path between the user equipment and a second network node. The split bearer is configured for a switching operation. The switching operation includes an operation where data transmission is restricted to be towards only one of the first data path and the second data path. The method also includes first transmitting on the split bearer towards the first data path. The method also includes performing the switching operation. The transmitting towards the first data path is switched to transmitting towards the second data path. The method also includes second transmitting on the split bearer towards the second data path.

Abstract: Examples of the disclosure relate to an apparatus comprising means for: receiving configuration information to enable communication with a first node apparatus and with a second node apparatus, wherein the configuration information relates to split bearer communication; using the configuration information relating to the first node apparatus to communicate with the first node apparatus; storing the configuration information relating to the second node apparatus; and using the stored configuration information to switch from communicating with the first node apparatus to communicating with the second node apparatus if communicating with the first node apparatus has failed.

Abstract: Example embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media of signaling reduction at handover of an IAB node. The method including sending, from a first device to a second device, a request message for a handover from the first device to the second device for a third device, the request message including a first cell configuration of the third device associated with the first device; receiving, from the second device, a response message acknowledging to the request, the response message including a resource configuration for a connection between the third device and the second device and a second cell configuration of the third device associated with the second device and sending the resource configuration to the third device. In this way, the signal overhead for the handover of an IAB node may be reduced significantly.

Abstract: A method including using master cell group resources for a downlink data transmission to a user equipment, wherein the user equipment is configured with at least one secondary cell group terminated split bearer and a secondary cell group is deactivated; determining, at a centralized central unit user plane, when secondary cell group resources of the deactivated secondary cell group are needed, wherein the determining is based, at least partially, on a data volume threshold for a data radio bearer as configured by a central unit control plane; and based upon the determining that the secondary cell group resources are needed, sending a notification to the central unit control plane to trigger activation of the secondary cell group resources.

Abstract: An apparatus comprising: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: receive (1400) a request to create context for a migrating node and optionally at least one child node of the migrating node; allocate (1402) addresses to the migrating node and optionally the at least one child node of the migrating node; and send (1404) the addresses allocated to the migrating node and optionally the at least one child node of the migrating node, prior to the migrating node migrating from a source to a target.

Abstract: There is disclosed method for a network apparatus, the method comprising configuring the network apparatus to use a first transmit and/or receive pattern selected from a plurality of available transmit and/or receive patterns for performing discovery procedures with another network apparatus, wherein the first transmit and/or receive pattern is selected from said plurality in dependence on at least the mobility of said network apparatus and/or on the relative mobility of said network apparatus to said another network apparatus.

Abstract: Embodiments of the present disclosure relate to for inter-CU topology adaptation. A first device establishes a communication interface between the first device and a second device. The first device receives from the second device a handover complete message indicating that a handover of the second device from a third device to the first device is completed. The first device transmits to the second device a command indicating the second device to activate cells configured by the first device.

Abstract: An apparatus comprising: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: receive (1400) a request to create context for a migrating node and optionally at least one child node of the migrating node; allocate (1402) addresses to the migrating node and optionally the at least one child node of the migrating node; and send (1404) the addresses allocated to the migrating node and optionally the at least one child node of the migrating node, prior to the migrating node migrating from a source to a target.

Abstract: A relay node within a network, the network further comprising at least one donor node coupled to the relay node, and a mobile termination coupled to the relay node and at least one donor node, the relay node comprising means for: receiving a configuration message; configuring the relay node, based on the configuration message, to perform at least one of: receiving packets from the mobile termination and originating from one of the donor nodes; and sending packets to one of the donor nodes by transmitting them to the mobile termination.

Abstract: A device communicates with a terminal in association with at least a first other device, using at least two carriers, wherein at least a first carrier towards the terminal is established from the device and at least a second carrier is established towards the terminal from the first other device. The device receives a report indicative of a connection quality of the first carrier, responsive thereto issues a request for handover of the first carrier towards a second device, sends relocation information in relation to the first carrier towards the first other device, and only after sending that relocation information, commands the terminal to perform a handover of the first carrier to the second device. Such device, in cooperation with other devices, accomplishes an optimized handover in terms of a primary component carrier relocation from a serving eNB towards a target eNB, while a secondary component carrier is maintained.

Abstract: Systems, methods, apparatuses, and computer program products for packet backtracking and/or rerouting by integrated access and backhaul (IAB) nodes are provided. One method may include receiving, at a network node, a packet over an ingress link. The method may also include determining whether the packet is being returned as undeliverable, and, when it is determined that the packet is being returned as undeliverable, re-routing, discarding or sending the packet over a return egress link.

Abstract: A method and apparatus may include configuring a split bearer. The split bearer is configured with a first data path between a user equipment and a first network node, and the split bearer is also configured with a second data path between the user equipment and a second network node. The split bearer is configured for a switching operation. The switching operation includes an operation where data transmission is restricted to be towards only one of the first data path and the second data path. The method also includes first transmitting on the split bearer towards the first data path. The method also includes performing the switching operation. The transmitting towards the first data path is switched to transmitting towards the second data path. The method also includes second transmitting on the split bearer towards the second data path.

Abstract: A method and apparatus may include configuring a split bearer. The split bearer is configured with a first data path between a user equipment and a first network node, and the split bearer is also configured with a second data path between the user equipment and a second network node. The split bearer is configured for a switching operation. The switching operation includes an operation where data transmission is restricted to be towards only one of the first data path and the second data path. The method also includes first transmitting on the split bearer towards the first data path. The method also includes performing the switching operation. The transmitting towards the first data path is switched to transmitting towards the second data path. The method also includes second transmitting on the split bearer towards the second data path.

Abstract: An apparatus of wireless communications comprising at least one processor, and at least one memory including computer program code, wherein the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus at least to: detect a radio link failure of a master cell group; suspend master cell group transmission for radio bearers, based on the detecting; and transmit or report a radio resource control indication over at least one of a signaling radio bearer between the apparatus and a secondary node, or a secondary cell group leg of a split signaling radio bearer.

Abstract: Various communication systems may benefit from the appropriate control of the timing of communication. For example, certain wireless communication systems may benefit from packet data convergence protocol windows, for example in the case of split bearers being in use. A method can include transmitting a plurality of protocol data units over a bearer mapped to a plurality of logical channels. The protocol data units can be transmitted in a radio link control unacknowledged mode. The method can also include managing at least one transmission characteristic of the transmitted plurality of protocol data units.

Abstract: A method includes receiving at a first base station rate information dependent on communication between a user equipment and another base station and using said rate information to schedule communications between said first base station and said user equipment.

Abstract: Data forwarding may be useful in many communication systems. Thus, for example, data forwarding support may be useful in dual connectivity in, for example, the third generation partnership project (3GPP) and more particularly to dual connectivity with enabled downlink (DL) data back forwarding. A method can include receiving, by a first network node, an indication indicating that for at least one split bearer, data received prior to the indication is to be forwarded to a second network node. The indication can also indicate that the at least one split bearer should be kept or maintained at the first network node. The method can also include, in response to the received indication, forwarding the data for the at least one split bearer received prior to the indication to the second network node.