Provided are a data transmission method, a terminal device, a network device, a chip, a computer readable storage medium, a computer program product and a computer program. The data transmission method includes: when it is determined that a terminal device is successfully handed over to a target network device, forwarding data to the target network device.

Some embodiments include an apparatus, method, and computer program product for using low layer protocols for inter-cell mobility management in a 5G wireless communications system. A serving 5G node B (gNB) can configure reports that a user equipment (UE) transmits to the serving gNB to make handover decisions. The serving gNB can configure a group of Transmission Configuration Indication (TCI) states (e.g., a group of beams) that correspond a physical cell, and the report includes layer 3 measurements corresponding to a neighboring or serving cell's TCI state. The report can be conveyed using lower layer protocols. The report can include layer 1 measurements conveyed using a layer 1 protocol and the serving gNB can perform filtering to generate corresponding layer 3 measurement results. Based on the reports, the serving gNB can perform a handover and synchronization using lower layer protocols, from one TCI state to another.

In order to provide a communication system capable of charging control in accordance with a bearer used by a UE even when the UE performs dual connectivity, a communication system according to the present disclosure includes a communication terminal (11) configured to communicate with a communication device (12) and a communication device (13) by using a different radio bearer for each of the communication device (12) and the communication device (13), and a control device (14) configured to determine whether to cause the communication device (12) to measure the traffic of each radio bearer.

This application provides a server switching method and apparatus, and a communications system. The method includes: receiving, by a terminal, a first notification message, where the first notification message includes an address of a second server; sending, by the terminal, to-be-sent service data to a first server and the second server based on the first notification message; receiving, by the terminal, downlink data from the first server; obtaining, by the terminal, data processing indication information; when obtaining the data processing indication information, sending, by the terminal, the to-be-sent service data to the second server; and receiving, by the terminal, downlink data from the second server. The server switching method and apparatus, and the communications system in the embodiments of this application can implement seamless switching, ensure service continuity, avoid service interruption caused when a terminal switches between servers, and help meet an end-to-end latency requirement.

Embodiments of this disclosure provide a signal processing method and device. The method includes: transmitting first information via RMSI, and/or transmitting second information via RRC signaling; wherein SSB related information indicated by the first indication information is at least partially same as SSB related information indicated by the second indication information.

Certain aspects of the present disclosure provide techniques for handling a radio link failure timer in the presence of a conditional handover command. A method that may be performed by a user equipment (UE) includes receiving, from a serving cell, a conditional handover command for handing over the UE to a target neighbor cell, wherein the conditional handover command includes one or more triggering conditions for executing a handover to a candidate target cell; monitoring one or more first signals from the candidate target cell for the one or more triggering conditions; and performing one of: stopping a timer based on performing a conditional handover to the target candidate cell; or detecting a timer has expired while monitoring the one or more first signals from the candidate target cell for the one or more triggering conditions.

The present application relates to methods, systems, and devices related to digital wireless communication, and more specifically, to techniques related to supporting service continuity during a network handover. In one exemplary aspect, a method for wireless communication is disclosed. The method includes receiving a first message from a second network node, the first message including slice remapping assistance information. The method also includes handing over, based on a handover procedure, a network service for a terminal from the first network node to a target network node using the slice remapping assistance information or initiate a terminal context retrieve procedure using the slice remapping assistance information.

An access and mobility management function (AMF) is modified with network slice information. First requested network slice information of a protocol data unit session is received from a wireless terminal. Second requested network slice information is generated based on the first requested network slice information of the PDU session and supported network slice information of a radio access network node of the wireless terminal

Disclosed are a slice processing method and apparatus, a storage medium, and a processor. The method includes: obtaining, by a first network side device, a first handover request sent from a source base station, and determining a handover behavior based on slice information.

A network migration method and apparatus, a communications device, and a communications system. The method includes: sending a migration request message to a target CU, where the migration request message includes first target information, and the first target information is context information of a DU of a migrating IAB node; receiving a migration response message sent by the target CU, where the migration response message includes first configuration information, and the first configuration information is information for network migration configured by the target CU for the DU; and sending the first configuration information to the IAB node, where the first configuration information is for use by the IAB node to implement a migration procedure of the DU.