Abstract: Embodiments of this disclosure provide a relay selection method and apparatus and a system. The method includes: relay equipment broadcasts relay discovery information, the relay discovery information including identifier information (a relay UE ID) of the relay equipment and identifier information (a cell ID) of a serving cell of the relay equipment, so that remote terminal receiving the relay discovery information selects relay equipment according to the relay discovery information or transmits relay information of discovered relay equipment to an eNB, thus the eNB may select relay equipment for the remote terminal. With the embodiments of this disclosure, the serving cell may learn a cell where a relay to which the terminal accesses is located, so as to perform configuration for the terminal or perform path switching of downlink data.

Abstract: A signal monitoring method is provided: If the terminal device determines, based on a message received or sent in a first time unit, that the terminal device is not in a DRX active time in a second time unit, the terminal device monitors the power saving signal in the second time unit. The terminal device determines, based on the power saving signal, whether to monitor a PDCCH in a first time interval. The first time unit is located before the second time unit, and is separated from the second time unit by M third time units. M is an integer greater than or equal to 1. The embodiments of this application are applied to a mobile communications system such as 5G NR.

Abstract: A scheduling request (SR) configuration method and sending method, and a corresponding apparatus are provided, to resolve a prior-art problem of a scheduling request configuration method and sending method, and a corresponding apparatus. The scheduling request configuration method includes: receiving, by a user equipment (UE), control signaling sent by a network device, where the control signaling is used to configure, for the UE, an SR configuration associated with at least one logical channel and at least two SR resource configurations associated with the SR configuration, and the SR resource configurations indicate physical resources used to signal an SR associated with the at least one logical channel; and signaling, by the UE based on a physical resource indicated by one of the at least two SR resource configurations, an SR associated with one of the at least one logical channel.

Abstract: This application discloses a communication method and a related product. The method includes: sending a first message, where the first message includes a first link configuration parameter, and the first link configuration parameter is used to establish a first link; and receiving a first acknowledgement message sent by a second user terminal, where the first acknowledgement message is used to indicate that the second user terminal completes establishment of the first link to the first user terminal.

Abstract: The present invention discloses a phosphine nitrogen ligand with multiple chiral centers and its synthesis method and application. The ligand has the axial chirality of a biaryl skeleton and the central chirality of a chiral amine. The chiral ligand is synthesized from commercially available raw materials through a simple five-step reaction, and the resulting diastereomer can be separated by simple column chromatography or recrystallization. The chiral phosphine nitrogen ligand synthesized by the present invention can catalyze the asymmetric three-component coupling reaction of terminal alkynes, aldehydes and amines, and realize the efficient preparation of chiral propargyl amines with high optical activity.

Abstract: This application relates to a discontinuous reception method. In the first time unit, for example, the first symbol, after a hybrid automatic repeat request HARQ feedback occasion of a sidelink HARQ process, a first terminal may start a drx-HARQ-RTT-TimerSL and start a drx-RetransmissionTimerSL when the drx-HARQ-RTT-TimerSL expires. During running of the drx-RetransmissionTimerSL, the first terminal monitors a physical downlink control channel. In this way, sidelink retransmission efficiency can be improved, an increase of a sidelink retransmission delay can be avoided, and sidelink-based applications, such as unmanned driving, automatic driving, assisted driving, intelligent driving, networked driving, intelligent networked driving, and car sharing in the field of artificial intelligence can be better supported.

Abstract: This application provides a communication method, a communications device, and a network device. When a beam failure occurs in a secondary cell of the communications device, the communications device sends a beam failure recovery request to the network device by using a PUCCH or a MAC CE, and determines an active state time of DRX based on a status of the beam failure recovery request. The communications device may also determine a stopping time of an uplink retransmission timer based on a running status of a configured grant timer, where the DRX of the communications device is in an active state when the uplink retransmission timer works; and monitors a PDCCH when the DRX of the communications device is in the active state.

Abstract: An indication method includes: receiving, by first user equipment, a first message sent by second user equipment, where the first message includes information indicating that the second user equipment supports an evolved user equipment-to-network relay function; and receiving, by the first user equipment, a second message sent by a network device, where the second message includes information indicating that the network device supports an evolved user equipment-to-network relay, or the second message includes information indicating that a cell in which the network device sends the second message supports an evolved user equipment-to-network relay.

Abstract: A sidelink resource determining method, an apparatus, and a system, to improve reliability of sidelink data transmission when a first terminal does not receive acknowledgment information for a first data packet from a second terminal. According to the method, when the first terminal determines that the first terminal does not receive the acknowledgment information that is for the first data packet and that is fed back by the second terminal, if the first terminal determines that the second terminal fails to decode the first data packet, the first terminal may determine a sidelink resource used to retransmit the first data packet, so that the first data packet can be retransmitted on the re-determined sidelink resource. In this way, reliability of sidelink transmission is improved. The solution may be applied to fields including unmanned driving, automated driving, driver assistance, intelligent driving, connected driving, intelligent network driving, car sharing, and artificial intelligence.

Abstract: A data processing method, including determining, by a second device, in response to a first device switching from the second device to a third device, data receiving status information of the first device, and reporting, by the second device, the data receiving status information of the first device, where the data receiving status information instructs a fourth device to send data to the first device according to the data receiving status information.

Abstract: This application discloses a path switching method that includes: sending, by a first terminal, a first message to a first network device, where the first message is used to request to switch a second terminal from an indirect connection path for communicating with the first network device by using the first terminal to a direct connection path for communicating with the first network device or a second network device, or the first message is used to request to release a link between the first terminal and the second terminal, and the first network device is different from the second network device; and releasing, by the first terminal, the link between the first terminal and the second terminal. With this solution, a relay terminal can trigger switching of a remote terminal from an indirect connection path to a direct connection path, to adapt to a relay scenario more flexibly.

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: A communication method and apparatus are disclosed, and are applicable to fields such as V2X, the internet of vehicles, intelligent networked vehicles, driver assistance, and intelligent driving. The method includes: A terminal device determines that uplink transmission and sidelink transmission both exist; and when one or more of a first condition, a second condition, a third condition, and a fourth condition are not met, the terminal device performs the sidelink transmission; or when any one of one or more of a first condition, a second condition, a third condition, and a fourth condition is met, the terminal device performs the uplink transmission.

Abstract: This application provides a communication method and apparatus, to help ensure a transmission reliability and/or communication range requirement. When configuring a transmission resource of a sidelink for a terminal, a network device also configures attribute information of the transmission resource. The attribute information may indicate reliability and/or a communication range corresponding to the transmission resource. The terminal device may select a matched logical channel for the transmission resource based on the attribute information of the transmission resource and attribute information of each logical channel of the terminal device. The attribute information of the logical channel is used to indicate reliability and/or a communication range of the logical channel.

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 processing apparatus and method for network indication and a communications system in a procedure of RC-IWK. The processing method includes: a base station determines whether UE context release indication contains information on a cause of release indicating that a traffic of a UE is steered from the LTE to the WLAN, when the UE context release indication transmitted by an MME; and initiates a connection reconfiguration procedure to the UE so that the UE is kept in a connected state, in a case where the UE context release indication contains the information on the cause of release indicating that the traffic of the UE is steered from the LTE to the WLAN. Hence, a case, for example, where the UE not expecting to use the LTE is steered to the LTE system again, will not occur.

Abstract: This application provides a pending SR cancellation method and an apparatus. In the method, when a specific condition is met, a terminal cancels a pending SR triggered by an uplink BSR, and when some other conditions are met, the terminal cancels a pending SR triggered by a sidelink BSR. In other words, the terminal may independently cancel the SR triggered by the uplink BSR and the SR triggered by the sidelink BSR. When canceling the SR triggered by the uplink BSR, the terminal may not cancel the SR triggered by the sidelink BSR, so that when sidelink data has a relatively high latency requirement.

Abstract: Embodiments of this application provide a method and a base station for obtaining a data radio bearer identifier. The method for obtaining a data radio bearer identifier includes: sending, by a first base station, a first message to a second base station, where the first message is used to request to add a data radio bearer (DRB); receiving, by the first base station, a second message sent by the second base station, where the second message is used to indicate an identifier of at least one DRB; and sending, by the first base station, first information to user equipment, where the first information includes DRB configuration information, and the DRB configuration information includes the identifier of the at least one DRB.

Abstract: A method for determining a hybrid automatic repeat request (HARQ) feedback resource includes determining, by a transmit end, the HARQ feedback resource of a receive end based on processing capability information of the receive end of a priority of data transmitted between the transmit end and the receive end, where the HARQ feedback resource carries HARQ information corresponding to the data transmitted between the transmit end and the receive end, and sending, by transmit end to the receive end, indication information indicating the HARQ feedback resource.