The present application provides a method and device for sidelink wireless communications. A first node receives a first signaling via an air interface; as a response to receiving the first signaling, transmits a first radio signal, the first radio signal comprises a second signaling; receives a second data unit set via an air interface; herein, the second signaling indicates that a first data unit set is not received, and both the first data unit set and the second data unit set are transmitted through a first radio bearer; the second signaling is used to determine the second data unit set; a transmitter of the first signaling is non-co-located with a receiver of the first radio signal; the first data unit set comprises at least one data unit; the second data unit set comprises the first data unit set. The present application can effectively reduce data retransmission.

The present application provides a method and device for sidelink wireless communications. A first node receives a first signaling via an air interface; as a response to receiving the first signaling, transmits a first radio signal, the first radio signal comprises a second signaling; receives a second data unit set via an air interface; herein, the second signaling indicates that a first data unit set is not received, and both the first data unit set and the second data unit set are transmitted through a first radio bearer; the second signaling is used to determine the second data unit set; a transmitter of the first signaling is non-co-located with a receiver of the first radio signal; the first data unit set comprises at least one data unit; the second data unit set comprises the first data unit set. The present application can effectively reduce data retransmission.

Embodiments of this application disclose a communication method and a related apparatus, so that remote UE can communicate with a network via relay UE that resumes or establishes a radio resource control RRC connection, to ensure communication quality of the remote UE. The method includes: A first access network device receives a first message sent by first UE, where the first message includes a first identifier of second UE, and the first identifier is an identifier of the second UE in an RRC inactive state or an RRC idle state. The first access network device pages the second UE based on the first message. The first access network device sends a second message to the first UE, where the second message indicates the first UE to perform path switching, the second message includes a second identifier of the second UE.

Embodiments of this application disclose a communication method and a related apparatus, so that remote UE can communicate with a network via relay UE that resumes or establishes a radio resource control RRC connection, to ensure communication quality of the remote UE. The method includes: A first access network device receives a first message sent by first UE, where the first message includes a first identifier of second UE, and the first identifier is an identifier of the second UE in an RRC inactive state or an RRC idle state. The first access network device pages the second UE based on the first message. The first access network device sends a second message to the first UE, where the second message indicates the first UE to perform path switching, the second message includes a second identifier of the second UE.

A session management function receives, from a wireless device, a first message comprising delay information for offloaded processing of data for an application. The session management function sends, to the wireless device, based on the delay information, a second message comprising offloading information.

A data transmission method includes: determining one or more listening frequency bands within an unlicensed frequency range; and determining the frequency band type of at least one listening frequency band in the one or more listening frequency bands, the frequency band type including at least one of an uplink listening frequency band, a downlink listening frequency band, or an undefined listening frequency band, the downlink listening frequency band being used for downlink transmission, the uplink listening frequency band being used for uplink transmission, and the undefined listening frequency band being used for either uplink transmission or downlink transmission.

A data transmission method includes: determining one or more listening frequency bands within an unlicensed frequency range; and determining the frequency band type of at least one listening frequency band in the one or more listening frequency bands, the frequency band type including at least one of an uplink listening frequency band, a downlink listening frequency band, or an undefined listening frequency band, the downlink listening frequency band being used for downlink transmission, the uplink listening frequency band being used for uplink transmission, and the undefined listening frequency band being used for either uplink transmission or downlink transmission.

A communication method applied to a terminal device includes receiving a first message from a network device. The first message includes configuration information of at least one first reference signal. The communication method also includes receiving a second message from the network device. The second message indicates an availability of at least one second reference signal, the at least one second reference signal has a quasi co-location (QCL) relationship with at least one synchronization signal/physical broadcast channel block (SSB), and the at least one first reference signal includes the at least one second reference signal. The communication method further includes receiving, from the network device and based on the configuration information and the second message, an available reference signal of the at least one second reference signal.

A communication method applied to a terminal device includes receiving a first message from a network device. The first message includes configuration information of at least one first reference signal. The communication method also includes receiving a second message from the network device. The second message indicates an availability of at least one second reference signal, the at least one second reference signal has a quasi co-location (QCL) relationship with at least one synchronization signal/physical broadcast channel block (SSB), and the at least one first reference signal includes the at least one second reference signal. The communication method further includes receiving, from the network device and based on the configuration information and the second message, an available reference signal of the at least one second reference signal.

A transmission tunnel changing method, an access network device, and a core network device are provided. The transmission tunnel changing method is performed by a base station, and the method includes: establishing multiple transmission tunnels for one target service; receiving data of the target service by using a source transmission tunnel, where the source transmission tunnel is one of the multiple transmission tunnels; receiving a transmission tunnel change instruction, where the transmission tunnel change instruction is used to instruct to change data transmission of the target service from the source transmission tunnel to a target transmission tunnel, and the target transmission tunnel is one of the multiple transmission tunnels; and receiving the data of the target service from the target transmission tunnel.