Provided is a data transmission method, including: receiving, by a target base station, a RRC resume request message and first data that are transmitted by a terminal device; transmitting, by the target base station, a retrieve terminal context request message to an anchor base station, the retrieve terminal context request message carrying the first data or first indication information indicating transmission of the first data; and receiving, by the target base station, a reply message transmitted by the anchor base station, the reply message carrying second indication information indicating whether the anchor base station is capable of transmitting the first data to a core network. The first data is transmitted to the core network by the target base station in response to the second indication information indicating that the anchor base station is incapable of transmitting the first data to the core network.

A communication control method is a method using a relay user equipment relaying communication between a base station and a remote user equipment. The communication control method includes establishing a connection between the remote user equipment and the relay user equipment, and performing a random access procedure establishing a connection between the remote user equipment and the base station. The performing the random access procedure includes a proxy operation where the relay user equipment, instead of the remote user equipment, performs at least a part of an operation to be performed by a Medium Access Control (MAC) layer in the random access procedure.

A communication control method is a method using a relay user equipment relaying communication between a base station and a remote user equipment. The communication control method includes establishing a connection between the remote user equipment and the relay user equipment, and performing a random access procedure establishing a connection between the remote user equipment and the base station. The performing the random access procedure includes a proxy operation where the relay user equipment, instead of the remote user equipment, performs at least a part of an operation to be performed by a Medium Access Control (MAC) layer in the random access procedure.

Embodiments of the present disclosure disclose a cell selection or reselection method and a device, to resolve a problem that a terminal device cannot effectively and rapidly access a cell without taking a slice of the cell into consideration when performing cell selection or reselection. The method may be performed by a terminal device, and includes: receiving a MIB message from a cell; in a case of determining, based on the MIB message, that the cell can be a candidate access cell, reading a SIB message of the cell, where the SIB message includes slice information of the cell; and selecting one slice from slices of the cell to access based on slice information supported by the terminal device and the slice information of the cell.

Methods and/or systems for managing continuity of data flow in 5G networks. A UE may receive a message from a 5G network in response to a PDU session establishment request. The message indicates a failure to establish a PDU session with a first DNN and a first network slice. A PDU session may be established with at least one of a second DNN and a second network slice, if the PDU session is matching with a route selection descriptor applicable to data traffic to be routed through the PDU session. A non-CIoT device may receive a message from a 5G network in response to a service request. The message may indicate failure of a service request procedure, pertaining to a PDU session, such as due to insufficient user-plane resources. The PDU session may be closed and reestablished. If there is lower layer failure in 5G, a connection may be established with a 4G network for data transfer.

Embodiments of the present application provide a data transmission method, a terminal device, and a non-transitory computer-readable storage medium. The method includes: receiving, by a terminal device, first configuration information, sent by a network device, and the first configuration is configured to determine configuration information of pre-configured resource, and in response to the pre-configured resource being activated, transmitting uplink data or receiving downlink data via the pre-configured resource by the terminal device. The terminal device includes a memory and a processor. The memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory to execute the above-mentioned data transmission method.

Embodiments of the present application provide a state indication method, a device, and a system. The method comprises: a relay core network device receives first state indication information sent by a first device, the first state indication information comprising at least one of first indication information and second indication information, the first indication information instructing a relay UE to perform UE-to-network relay communication, the second indication information instructing the relay UE to perform UE-to-network relay communication for an emergency service, and the first state indication information being used for determining not to initiate a NAS signaling connection release process of the relay UE.

Embodiments of the present application provide a state indication method, a device, and a system. The method comprises: a relay core network device receives first state indication information sent by a first device, the first state indication information comprising at least one of first indication information and second indication information, the first indication information instructing a relay UE to perform UE-to-network relay communication, the second indication information instructing the relay UE to perform UE-to-network relay communication for an emergency service, and the first state indication information being used for determining not to initiate a NAS signaling connection release process of the relay UE.

Method, device and computer program product for wireless communication are provided. A method includes: transmitting, by a first wireless communication node, a control message to a second wireless communication node, to control the second wireless communication node to instruct a wireless communication terminal to enter a radio resource control, RRC, inactive mode and transmitting at least one small data transmission, SDT, configuration to the wireless communication terminal.

Method, device and computer program product for wireless communication are provided. A method includes: transmitting, by a first wireless communication node, a control message to a second wireless communication node, to control the second wireless communication node to instruct a wireless communication terminal to enter a radio resource control, RRC, inactive mode and transmitting at least one small data transmission, SDT, configuration to the wireless communication terminal.