A system for delaying or inhibiting data is provided in order to shorten the time required for a reselection process from a first communication protocol to a second communication protocol. Reselection from the first communication protocol to the second communication protocol (e.g., 3G to 4G) requires a period of time without data transfers to allow the reselection to complete. The system delays or inhibits data transfers on the mobile device until the reselection process completes or the mobile device is idle for a predetermined length of time. In an embodiment, the system can buffer outgoing data and then send the data once the reselection has completed. In other embodiments, the system can drop packet sessions or ignore incoming packet pages. In another embodiment, the system can delay or inhibit data based on the priority of the data.

Methods, apparatus, and systems for providing multicast handover are disclosed. In one example aspect, the method includes receiving, by a first radio access node, a multicast flow comprising data packets of a multicast service, determining, by the first radio access node, whether to initiate a handover procedure for a user device from the first radio access node to a second radio access node, replacing, upon determination to initiate the handover procedure, by the first radio access node, a first portion of the data packets with a flow identifier of a unicast flow, and forwarding, by the first radio access node, the data packets of the multicast service including the flow identifier of the unicast flow to the second radio access node.

Embodiments of this application provide a duplication mode communication processing method in a central unit-distributed unit (CU-DU) architecture. In a possible implementation, in a process of establishing a user plane tunnel between a CU and a DU by exchanging information about uplink tunnel endpoints and information about downlink tunnel endpoints, the DU provides an identity of a primary path to the CU, thereby implementing a duplication mode of a data radio bearer.

Embodiments of this application provide a duplication mode communication processing method in a central unit-distributed unit (CU-DU) architecture. In a possible implementation, in a process of establishing a user plane tunnel between a CU and a DU by exchanging information about uplink tunnel endpoints and information about downlink tunnel endpoints, the DU provides an identity of a primary path to the CU, thereby implementing a duplication mode of a data radio bearer.

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. The present disclosure provides a method for performing access for a UE. In addition, the present disclosure discloses a data forwarding method and a data forwarding equipment, user equipment and base station. By the technical solutions disclosed in the present disclosure, a UE may help a base station to forward data of other UEs.

Provided are a data transmission method and apparatus. The method includes: detecting, by a source base station, that link quality of a connection with a terminal degrades; sending data unsuccessfully transmitted by a DU via a downlink data frame to a target base station through a CU, and transmitting the data unsuccessfully transmitted to the terminal through the target base station; or receiving, by the target base station, a link quality degradation message of an original base station so as to stop sending offload data to the source base station and transmitting the data unsuccessfully transmitted indicated by a maximum serial number of the data which has been transmitted continuously and successfully in the message to the terminal.

Systems, methods, apparatuses, and computer program products for mobility failure evidence-related operations. A UE may measure, record, and report a channel access waiting (CAW) time period that elapsed from having a handover-related message in a transmission buffer until a channel for transmission of the handover-related message was obtained or until an acknowledgement or negative acknowledgement from a receiver of the handover-related message was received. The CAW time period information may be provided to a network node, and the network node may control mobility robustness optimization based on the received information.

Provided are a data packet transmission method and apparatus, communication node and medium. The method includes transmitting a handover request message that includes information for a target donor node to forward data; and receiving retransmission data packets forwarded by the target donor node.

Disclosed is a method performed by a network node (130, 140, 160) of a wireless communication network (100) comprising a first (130) and a second (140) core network node and a first (150) and a second (160) base station (150). A session of a wireless device (170) comprises data packets routed via a plurality of anchor network nodes (115, 120) from a data network (110). In connection with the wireless device (170) handing over from the first base station (150) and the first core network node (130) to the second base station (160) and the second core network node (140), the method comprises receiving information of the number of the plurality of anchor network nodes (115, 120) via which data packets of the session are routed, receiving data packets from the plurality of anchor network nodes (115, 120), receiving an end marker of each of the plurality of anchor network nodes (115, 120), each end marker indicating a last data packet of one of the plurality of anchor network nodes routed via the first core network node (130), and when the number of received end markers equals the number of the plurality of anchor network nodes, triggering to send to the wireless device (170) any data packets related to the session not routed via the first base station stored in a buffer of the second base station.

Disclosed is a method performed by a network node (130, 140, 160) of a wireless communication network (100) comprising a first (130) and a second (140) core network node and a first (150) and a second (160) base station (150). A session of a wireless device (170) comprises data packets routed via a plurality of anchor network nodes (115, 120) from a data network (110). In connection with the wireless device (170) handing over from the first base station (150) and the first core network node (130) to the second base station (160) and the second core network node (140), the method comprises receiving information of the number of the plurality of anchor network nodes (115, 120) via which data packets of the session are routed, receiving data packets from the plurality of anchor network nodes (115, 120), receiving an end marker of each of the plurality of anchor network nodes (115, 120), each end marker indicating a last data packet of one of the plurality of anchor network nodes routed via the first core network node (130), and when the number of received end markers equals the number of the plurality of anchor network nodes, triggering to send to the wireless device (170) any data packets related to the session not routed via the first base station stored in a buffer of the second base station.