A data transmission method and apparatus. The method includes: a source access network device that receives an end marker from a core network device through a transmission tunnel of a PDU session of a first terminal device, where the PDU session is associated with a first multicast/broadcast service; and in response to the end marker, the source access network device determines, based on the association between the PDU session and the first multicast/broadcast service, that the end marker acts on the first multicast/broadcast service of the first terminal device, to stop sending data of the first multicast/broadcast service to a target access network device through a forwarding tunnel of the first terminal device.

A method, apparatus, and a computer-readable storage medium are provided for forwarding of buffered user data at a target node to a re-establishment node. In an example implementation, the method may include receiving, by a first network node, a handover cancel or an Xn-User plane address indication message from a second network node, the handover cancel or the Xn-User plane address indication message including tunnel addresses for one or more data radio bearers; and forwarding, by the first network node, buffered downlink packets to a third network node or the second network node, the forwarding based at least on the tunnel addresses. In an additional example implementation, the method may include sending, by a third network node, tunnel addresses for one or more data radio bearers to a second network node upon re-establishing of a radio resource control connection; and receiving, by the third network node, buffered packets at the first network node from a second network node or the first network node. In an additional example implementation, the method may include initiating, by a user equipment, a radio resource control re-establishment procedure with a third network node, the re-establishment procedure is initiated upon a handover failure of the user equipment from a second network node to a first network node; and receiving, by user equipment, buffered packets at the first node from a third network node.

A method, apparatus, and a computer-readable storage medium are provided for forwarding of buffered user data at a target node to a re-establishment node. In an example implementation, the method may include receiving, by a first network node, a handover cancel or an Xn-User plane address indication message from a second network node, the handover cancel or the Xn-User plane address indication message including tunnel addresses for one or more data radio bearers; and forwarding, by the first network node, buffered downlink packets to a third network node or the second network node, the forwarding based at least on the tunnel addresses. In an additional example implementation, the method may include sending, by a third network node, tunnel addresses for one or more data radio bearers to a second network node upon re-establishing of a radio resource control connection; and receiving, by the third network node, buffered packets at the first network node from a second network node or the first network node. In an additional example implementation, the method may include initiating, by a user equipment, a radio resource control re-establishment procedure with a third network node, the re-establishment procedure is initiated upon a handover failure of the user equipment from a second network node to a first network node; and receiving, by user equipment, buffered packets at the first node from a third network node.

Embodiments include methods for an integrated access backhaul (IAB) node in a wireless network to migrate from a first centralized unit (CU) to a second CU. Such methods include receiving a handover command from the first CU via a source parent IAB node. The handover command includes an identifier of a target cell for the handover. Such methods include determining that the handover command is for an inter-CU migration of the IAB node to the second CU and, based on determining that the handover command is for an inter-CU migration, performing modified handling of uplink and/or downlink data buffered at the IAB node until execution of the handover command. Embodiments also include complementary methods for handling migration of a child IAB node from a first CU to a second CU, as well as IAB nodes configured to perform such methods. FIG. 17 is selected for publication.

Methods, systems, and devices related to mobility management (e.g., reducing transmission delay and interference, and/or increasing transmission reliability) using the unlicensed spectrum are described. In one representative aspect, a method for wireless communication includes receiving, at a wireless communication node, a first message from a mobile device requesting a reestablishment of a network connection; transmitting, from the wireless communication node, a second message to the mobile device, the second message including information for reestablishing and reconfiguring the network connection; and receiving, at the wireless communication node, a third message from the mobile device acknowledging at least one of (1) completing a reestablishment of the network connection, or (2) completing a reconfiguration of the network connection.

The present disclosure relates to a serving wireless communication node (AP.sub.1) in a wireless communication system (1), wherein the serving node (AP.sub.1) is adapted to determine that a served user terminal (2) is going to enter a zone (3) that switches between being reachable and unreachable for the serving node (AP.sub.1), and to predict data (x.sub.m+1 . . . x.sub.n) to be transmitted to the user terminal (2) for at least a part of the time the user terminal (2) is in the zone (3) and is unreachable for the serving node (AP.sub.1). When the zone (3) is reachable, the sewing node (AP.sub.1) is adapted to transfer predicted data (x.sub.m+1 . . . x.sub.n) to a cache node (AP.sub.C) positioned within the zone (3), enabling the cache node (AP.sub.C) to transfer the predicted data (x.sub.m+1 . . . x.sub.n) to the user terminal (3) when the user terminal (2) is in the zone (3) and is unreachable for the serving node (AP.sub.1).

The present disclosure relates to a serving wireless communication node (AP.sub.1) in a wireless communication system (1), wherein the serving node (AP.sub.1) is adapted to determine that a served user terminal (2) is going to enter a zone (3) that switches between being reachable and unreachable for the serving node (AP.sub.1), and to predict data (x.sub.m+1 . . . x.sub.n) to be transmitted to the user terminal (2) for at least a part of the time the user terminal (2) is in the zone (3) and is unreachable for the serving node (AP.sub.1). When the zone (3) is reachable, the sewing node (AP.sub.1) is adapted to transfer predicted data (x.sub.m+1 . . . x.sub.n) to a cache node (AP.sub.C) positioned within the zone (3), enabling the cache node (AP.sub.C) to transfer the predicted data (x.sub.m+1 . . . x.sub.n) to the user terminal (3) when the user terminal (2) is in the zone (3) and is unreachable for the serving node (AP.sub.1).

The present disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4.sup.th-Generation (4G) communication system such as Long Term Evolution (LTE). The embodiments in the present disclosure allow to transfer remaining data between different base stations in a dual-registration interworking process, which provides terminal mobility between 4G and 5G networks without a data loss. Further, it provides the terminal mobility with no data loss without changing 5G and 4G base station implementation through addition of a simple function of new equipment, such as SMF and UPF. Further, it supports different QoS and forwarding path units in the 5G/4G networks without changing 5G and 4G base station functions. Further, it exempts additional function implementation costs for re-ordering in a terminal and a network through in-order delivery of packets to the terminal without changing the packet order during 4G-5G network movement.

An abnormal traffic analysis apparatus includes receiving means for receiving traffic from a device, analysis means for analyzing whether or not traffic received from the device is abnormal traffic, analysis result recording means for recording a result of analysis performed by the analysis means, and device management means for managing movement of the device between edges. If it is determined by the device management means that a device that is a target of analysis performed by the analysis means moves to an edge, the receiving means creates information for continuing analysis of traffic received from the device and transmits the information to an apparatus for analyzing traffic that is included in the edge to which the device moves.

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method and equipment for handover are provided. The method includes informing, by a source base station, a source core network whether a direct data forwarding path is available, determining, by the source core network, whether to use direct data forwarding or indirect data forwarding, informing, by the source core network, a target core network of information of direct data forwarding, indirect data forwarding or data forwarding being not possible, informing, by the target core network, a target base station of the information of direct data forwarding, indirect data forwarding or data forwarding being not possible, and allocating, by the target base station, tunnel information for data forwarding.