Abstract: Methods for dynamically triggering a Flow Control (FC) configuration change. The methods, which can be performed by a wireless device and/or a base station, involve determining whether there is a need to trigger the FC configuration change and triggering the FC configuration change in response to determining that the FC configuration change is needed. The FC configuration change includes switching between an FC activated state, in which FC and aggregation are enabled and Active Queue Management (AQM) is configured for a Packet Data Convergence Protocol (PDCP) Service Data Unit (SDU) buffer, and an FC deactivated state, in which FC and aggregation are disabled and AQM is configured for a Radio Link Control (RLC) SDU buffer. By dynamically triggering the FC configuration change, it is possible to enable FC and aggregation based on traffic volume on a Radio Bearer (RB) such that the benefit of aggregation can be realized when needed.

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 network node for transmission of a Packet Data Convergence Protocol, PDCP, Protocol Data Unit, PDU, to a wireless communications device is provided. The network node and the wireless communications device operate in a wireless communications network. The network node arranges (505) a number of PDCP PDUs in a numerical order based on their respective PDCP Sequence Number, SN. The number of PDCP PDUs is taken from a first set of PDCP PDUs comprising one or more first time transmitted PDCP PDUs and from a second set of PDCP PDUs comprising one or more retransmitted PDCP PDUs. The one or more first time transmitted PDCP PDUs and the one or more retransmitted PDCP PDUs are received from a controlling node. The network node transmits (506) the number of the PDCP PDUs in the numerical order to the wireless communications device 120.

Abstract: A method performed by a control node for handling communication of data of one or more wireless devices in a wireless communications network. The control node triggers a control process on radio access bearers (RAB) and identifies more than one RAB, to perform the control process on, for at least one wireless device. The control node further bundles control information associated with the identified more than one RAB in a control signal; and provides to a process node, the control signal for the identified more than one RAB.

Abstract: The invention refers to a method performed by a control plane, CP, functional part (415) of a base station, the method comprising establishing a transport network layer, TNL, association with a network function (440B) that supports a plurality of user plane, UP, functional parts of first base station; transmitting to the network function a request message (701) comprising information for selecting a first UP functional part among the plurality of UP functional parts; and receiving, in response to the request message, a response message (703) transmitted by the network function, wherein the response message comprises an identifier of the first UP functional part. The invention further refers to corresponding methods performed by the UP functional part, the network function, and to a corresponding base station.

Abstract: The invention relates to a method performed by a network function capable of supporting at least a user plane, UP, functional part of a base station (440B), comprises establishing a transport network layer, TNL, association with a control plane, CP, functional part of the base station; receiving a request message (501) from the CP functional part of the base station (415), wherein the request message comprises an identifier of the base station; creating a UP functional part of the base station using the identifier of the base station; and transmitting a response message (505) to the CP functional part of the base station, wherein the response message comprises an identifier of the created UP functional part of the base station; the invention further relates to a method performed by a CP functional part of a base station; and to corresponding network node adapted to perform above-described methods.

Abstract: A method performed by a network node for transmission of a Packet Data Convergence Protocol, PDCP, Protocol Data Unit, PDU, to a wireless communications device is provided. The network node and the wireless communications device operate in a wireless communications network. The network node arranges (505) a number of PDCP PDUs in a numerical order based on their respective PDCP Sequence Number, SN. The number of PDCP PDUs is taken from a first set of PDCP PDUs comprising one or more first time transmitted PDCP PDUs and from a second set of PDCP PDUs comprising one or more retransmitted PDCP PDUs. The one or more first time transmitted PDCP PDUs and the one or more retransmitted PDCP PDUs are received from a controlling node. The network node transmits (506) the number of the PDCP PDUs in the numerical order to the wireless communications device 120.

Abstract: A method performed by a control node for handling communication of data of one or more wireless devices in a wireless communications network. The control node triggers a control process on radio access bearers (RAB) and identifies more than one RAB, to perform the control process on, for at least one wireless device. The control node further bundles control information associated with the identified more than one RAB in a control signal; and provides to a process node, the control signal for the identified more than one RAB.

Abstract: Disclosed herein is a method, network node, and computer program product for buffer handling utilizing in-band control signaling. The method includes storing, in a buffer memory, first data to be transmitted to a user equipment. The method further includes obtaining a discard message from a second network node. The method additionally includes discarding the first data based on the discard message. In another embodiment, the method includes obtaining a transmission status feedback message. The method also includes determining that a first buffer memory of a second network node contains first data. The method further includes sending a discard message to the second network node. The discard message comprises an indication that the second network node is to discard the first data.