Abstract: A data processing method includes communicating, by a remote terminal device, with a network device by a relay device. The communicating includes starting a timer in response to a radio resource control (RRC) connection establishment procedure of the remote terminal device being initialized. The communicating includes sending indication information to the relay terminal device in response to the timer expiring. The indication information is useable to indicate the relay terminal device not to forward data corresponding to the remote terminal device, the indication information is useable to release a unicast link between the remote terminal device and the relay terminal device, or the indication information is useable to indicate to clear a buffer corresponding to the remote terminal device.

Abstract: A measurement configuration determining method includes receiving, by a terminal device, a first message from a network device. The first message includes a first relationship, the first relationship indicates an association relationship between an index of a reference signal and measurement configuration information. The measurement configuration information is adapted for the terminal device to perform a measurement and the terminal device determines the measurement configuration information based on the index.

Abstract: A communication method includes a terminal device sending M compressed data packets. The M compressed data packets are obtained by compressing M data packets based on a first buffer. The terminal device reestablishes a PDCP layer without resetting the first buffer. The terminal device then sends N compressed data packets. The N compressed data packets are a part or all of the M compressed data packets. When reestablishing the PDCP layer, the terminal device does not reset the first buffer. In this case, if the terminal device needs to retransmit a data packet, the terminal device may retransmit a previously obtained compressed data packet, and does not need to compress the data packet again.

Abstract: This application provides a data processing method and apparatus, and a computer storage medium. When a PDCP entity over a UM DRB is re-established, or when a cell handover occurs and the PDCP entity over a UM DRB uses a key used before the handover, the PDCP entity determines a first SDU, where the first SDU is an SDU that is associated with a sequence number by the PDCP entity but whose corresponding data has not been transmitted through an air interface; and delivers a PDU corresponding to the first SDU to an RLC entity. Data corresponding to the first SDU is redelivered, to avoid a data packet loss caused by preprocessing of the PDCP entity.

Abstract: This application provides a data transmission method and an apparatus, and relates to the field of communication technologies. According to the method, a first network device sends a first message including first information to a remote terminal device. The first message indicates the remote terminal device to switch from being connected to the first network device through a first path to being connected to a second network device through a second path. The first path includes at least one relay terminal device. The second path includes at least one relay terminal device or does not include a relay terminal device. The first information indicates a receiving status of a first PDCP entity of the first network device. The first information is carried in a switch command, so that the remote terminal device can receive the first information as soon as possible.

Abstract: This specification discloses a relay communication method and an apparatus, and relates to the field of communication technologies, to ensure security in a relay user equipment (relay UE) discovery process. The method includes: Second user equipment broadcasts a layer 2 (L2) identifier, and first user equipment receives the L2 identifier of the second user equipment, and reports the L2 identifier of the second user equipment and signal quality of the second user equipment to a first access network device. Alternatively, a radio network temporary identifier (RNTI) of second user equipment is sent to first user equipment through a unicast connection. In a relay UE discovery process, leakage of a UE RNTI is avoided, and security of relay UE is ensured.

Abstract: Embodiments of this application provide a data packet decompression method. In the method, the network side device receives a first PDCP data packet, decompresses the first PDCP data packet, and sends a first buffer data identifier to the electronic device if the first PDCP data packet fails to be decompressed, where the first buffer data identifier corresponds to buffer data used for decompressing the first PDCP data packet; the electronic device receives the first buffer data identifier, and sends first buffer data corresponding to the first buffer data identifier to the network side device, where the first buffer data is buffer data used for generating the first PDCP data packet; and the network side device receives the first buffer data, and decompresses the first PDCP data packet by using the first buffer data.

Abstract: Embodiments of this application relate to a wireless communication method applied to transmission user equipment (Tx UE), including: receiving first secondary carrier status indication information from a network device, to indicate that each of a plurality of secondary carriers is in an activated state or a deactivated state, the plurality of secondary carriers are used for multi-carrier sidelink communication between the transmission user equipment and at least one reception user equipment, and each of the at least one reception user equipment corresponds to at least one of the plurality of secondary carriers; and sending second secondary carrier status indication information to each reception user equipment, to indicate that each of the at least one secondary carrier is in an activated state or a deactivated state.

Abstract: This application provides method includes: A remote terminal device receives first configuration information by using a relay terminal device, where the first configuration information includes or indicates information used to configure a first SL RLC bearer on a sidelink between the remote terminal device and the relay terminal device. The remote terminal device establishes the first SL RLC bearer based on the first configuration information, where the first SL RLC bearer corresponds to at least one first SRB. The remote terminal device transmits control signaling to a network device on the at least one first SRB (Uu SRB) by using the relay terminal device.

Abstract: A wireless communication method implemented by a transmission user equipment includes receiving first secondary carrier status indication information from a network device, where the first secondary carrier status indication information indicates that each of a plurality of secondary carriers is in an activated state or a deactivated state, the plurality of secondary carriers are used for multi-carrier sidelink communication between the transmission user equipment and at least one reception user equipment, and each reception user equipment corresponds to at least one secondary carrier; sending second secondary carrier status indication information to each reception user equipment, where the second secondary carrier status indication information indicates that each of the at least one secondary carrier is in an activated state or a deactivated state; and when acknowledgment information is received from one or more reception user equipments, sending secondary carrier setting complete information to the network

Abstract: This application provides a data processing method and apparatus, and a computer storage medium. When a PDCP entity over a UM DRB is re-established, or when a cell handover occurs and the PDCP entity over a UM DRB uses a key used before the handover, the PDCP entity determines a first SDU, where the first SDU is an SDU that is associated with a sequence number by the PDCP entity but whose corresponding data has not been transmitted through an air interface; and delivers a PDU corresponding to the first SDU to an RLC entity. Data corresponding to the first SDU is redelivered, to avoid a data packet loss caused by preprocessing of the PDCP entity.

Abstract: Embodiments of this application relate to the communications field, and provide a route update method, the method, comprising: sending a medium access control protocol data unit (MAC PDU), wherein the MAC PDU comprises a first buffer status report (BSR); and canceling, in response to the sending of the MAC PDU, a scheduling request triggered prior to the MAC PDU assembly, wherein the first BSR comprises a buffer status up to the last event that triggers a BSR prior to the MAC PDU assembly.

Abstract: A data processing method, where a first device communicates with a second device using a relay node, where the relay node does not have a Packet Data Convergence Protocol (PDCP) entity, and the method includes transmitting, by the first device, a first data unit group, where the first data unit group is in a first sequence range, receiving, by the first device, first information using the relay node, where the first information indicates a data unit that the second device has received or has not received in the first data unit group, determining, by the first device, a second sequence range based on the first information.

Abstract: A radio bearer configuration method, an apparatus, and a system. The method includes: determining that a first sidelink radio bearer and a second sidelink radio bearer that are used during communication between the second terminal and a first terminal are associated with each other; and sending a first message to the first terminal, where the first message includes first indication information, and the first indication information is used to indicate that the first sidelink radio bearer is associated with the second sidelink radio bearer, where the first sidelink radio bearer is used by the first terminal to send first sidelink service data to the second terminal, and the second sidelink radio bearer is used by the second terminal to send a first radio link control RLC status report for the first sidelink service data to the first terminal.

Abstract: This application provides a communication method and a communications device. The method includes: A first device receives a first message sent by a second device. The first message is used to indicate a bearer configuration of a bearer of the first device and an initial status of the bearer configuration, and the bearer configuration includes a first bearer configuration and/or a second bearer configuration. The first device determines the bearer configuration and the initial status of the bearer configuration based on the first message. According to the technical solutions in embodiments of this application, a bearer configuration of a terminal device and an initial status of the bearer configuration of the terminal can be indicated. Because both the bearer configuration of a bearer of the terminal and the initial status of the bearer configuration of the terminal are indicated, communication efficiency is improved.

Abstract: A communications method and apparatus are provided. A network device determines whether a first capability of a terminal device is less than or equal to a second capability of the terminal device. The first capability is a capability of the terminal device of working at a first frequency when the terminal device supports only a first radio access technology, and the second capability is a capability of the terminal device corresponding to the first frequency in a first frequency combination. When the first capability is less than or equal to the second capability, the network device sends a first message to the terminal device. The first message is used to indicate the terminal device to measure a second frequency, the first message does not include a configuration of a first measurement gap, and the first measurement gap is used to measure the second frequency.

Abstract: This application provides a data processing method and apparatus, and a computer storage medium. When a PDCP entity over a UM DRB is re-established, or when a cell handover occurs and the PDCP entity over a UM DRB uses a key used before the handover, the PDCP entity determines a first SDU, where the first SDU is an SDU that is associated with a sequence number by the PDCP entity but whose corresponding data has not been transmitted through an air interface; and delivers a PDU corresponding to the first SDU to an RLC entity. Data corresponding to the first SDU is redelivered, to avoid a data packet loss caused by preprocessing of the PDCP entity.

Abstract: A timer control method includes a receiving device that performs re-establishment or data recovery on a Packet Data Convergence Protocol (PDCP) layer of the receiving device. The PDCP layer stops the running of a reordering timer of the PDCP layer when the reordering timer is in a running state, where the reordering timer enables the PDCP layer to wait to receive a lost data packet. Because the reordering timer is stopped from running rather than expires, the PDCP layer does not update a value of RX_DELIV.

Abstract: This application relates to a communication method and apparatus. A first device determines to process a first radio bearer in a first processing manner. The first processing manner activates or deactivates a data packet compression function of the first radio bearer. Then, the first device sends first information, where the first information is used to indicate the first processing manner. The first device can send the first information to indicate to activate or deactivate the data packet compression function, which means that the data packet compression function can be deactivated.

Abstract: A method and a device are provided. The method includes: selecting, by user equipment, a random access preamble from a random access preamble set, and selecting a random access channel resource from a random access channel resource set; sending, by the user equipment, the random access preamble by using the random access channel resource; and receiving, by the user equipment, a random access response message on a first downlink bandwidth part; wherein at least one of the random access preamble set or the random access channel resource set corresponds to the first downlink bandwidth part, and the random access channel resource includes at least one of a random access channel time domain resource or a random access channel frequency domain resource.