Abstract: A communication method, a communication apparatus, and a medium. Broadcast information is received, where the broadcast information includes a corresponding value of a target parameter in one or more terrestrial geographic location regions. A first value is obtained based on a target region and the broadcast information, where the target region is the terrestrial geographic location region in which a terminal device is located. The first value is a corresponding value of the target parameter in the target region. The first value is usable to indicate synchronization signal power corresponding to the target region. The terminal device obtains corresponding synchronization signal power based on different terrestrial geographic location regions in which the terminal device is located.

Abstract: This application provides a random access method and a communication apparatus, which may be applied to a communication system, to avoid using a global navigation satellite system (GNSS) capability of a terminal apparatus to perform random access. According to embodiments of this application, a random access success rate can be improved when a terminal apparatus performs random access (for example, in the case of a non-GNSS capable terminal apparatus). In some embodiments, a terminal apparatus receives first indication information from a network device. The first indication information indicates a first correspondence between a first service area of the network device and at least one first timing advance. The first service area is a service area in which the terminal apparatus is located. In this way, the terminal apparatus can send a message 1 to the network device based on the at least one first timing advance, to perform random access.

Abstract: This application discloses a communication method and apparatus. A terminal receives first indication information from a first cell corresponding to a first satellite, where the first indication information indicates the terminal to perform uplink synchronization with a second satellite without triggering a random access procedure. After the terminal is within a coverage area of the second satellite, if a first synchronization signal and physical broadcast channel block (SSB) is the same as a second SSB, the terminal performs uplink synchronization with the second satellite without triggering the random access procedure. The first SSB is used for communication between the terminal and the first satellite, and the second SSB is used for communication between the terminal and the second satellite. This way efficiency of inter-satellite handover of the terminal can be improved.

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: 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: In accordance with an embodiment, a method includes: encoding, by a first terminal at a satellite link control (SLC) layer, a first user identification (ID) of the first terminal into binary first data, wherein the first user ID comprises second data and third data, the binary first data includes binary fourth data and binary fifth data, the binary fourth data is obtained by encoding sixth data, the sixth data is obtained by compressing the second data, a data length of the sixth data is less than that of the second data, and the binary fifth data is obtained by encoding the third data; filling, by the first terminal at the SLC layer, the binary first data in a user ID field in frame header information of a first user frame; and sending, by the first terminal, the first user frame to a satellite network device.

Abstract: In an implementation, an apparatus receives first indication information from a network device, and when the apparatus needs to report a first measurement quantity, the apparatus may determine, based on the first indication information, positioning reference signals associated with the first measurement quantity, so that the apparatus can obtain and report the first measurement quantity by measuring the determined positioning reference signals associated with the first measurement quantity. The first measurement quantity is used for determining a distance between the apparatus and a second apparatus, to assist in positioning a target apparatus.

Abstract: This application provides a satellite alignment method, a terminal device, and a computer-readable storage medium, and relates to the field of satellite communication technologies. In this application, locations of a satellite that needs to be aligned with at different moments and phase differences of a signal arriving at antenna elements of the terminal device at different moments can be obtained based on ephemeris information, and a beam is generated based on the phase difference of the signal arriving at the antenna elements, so that the generated beam is directed to the locations of the satellite at different moments, and a radiation direction of the antenna element of the terminal device is automatically aligned with the satellite, to improve alignment efficiency. In addition, alignment accuracy can be improved, and effective communication between the terminal device and the satellite is enhanced.

Abstract: A communication method includes receiving first information, where the first information indicates at least one first resource, and the first resource is used for transmission of a first scheduling request (SR); and sending the first SR to a network device on the first resource, where the first SR is used to request a second resource for transmission of a sidelink positioning reference signal (SL-PRS), and the SL-PRS is used for sidelink positioning. According to the method, the at least one first resource is pre-configured for the terminal device based on the first information. When the terminal device has the SL-PRS to be transmitted, the terminal device may send the first SR to the network device on the first resource, and the terminal device may request, from the network device via the first SR, the resource for transmission of the SL-PRS.

Abstract: An information transmission method and an apparatus. A determination is made that a first sidelink grant is usable to transmit information to a first destination address in at least one destination address, where the first destination address has first information with a highest priority in the at least one destination address. A first terminal apparatus selects, from at least one destination address, a first destination address associated with a first sidelink grant, where the first destination address has first information with a highest priority in the at least one destination address, and one of the at least one destination address has an SL-PRS, or one of the at least one destination address has an SL-PRS and second information.

Abstract: This application provides a positioning method and a first communication apparatus. The first communication apparatus sends a first message used to request a second message from a second communication apparatus, and the second message is a positioning message or a positioning reference signal. The first communication apparatus receives the second message in a first time period that, includes a time period from sending the first message to receiving the second message, or includes a time period from a first moment to receiving the second message, where the first moment is a moment after the first communication apparatus sends the first message. The first communication apparatus is in DRX active time in the first time period. Accordingly, the communication apparatus is able to receive a positioning message in time, to meet a delay requirement.

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: Embodiments of this application describe an inter-device communication method, a related device, and a system. The method includes a first device sending a first message. The first message includes a first parameter that indicates that the first message is a message for announcing provision of an interactive business service. A second device receives the first message. The second device determines, based on the first message, whether the first device can provide the interactive business service for the second device. The second device communicates with the first device when the second device determines that the first device can provide the interactive business service for the second device. According to the technical solutions provided in embodiments of this application, interaction between devices can be more matched.

Abstract: A communication method includes obtaining an identifier of a first resource. The first resource is used for transmission of a sidelink positioning reference signal. The identifier of the first resource is determined based on at least one of a length of a time domain resource available for transmission of the sidelink positioning reference signal, a start position of a time domain resource used for transmission of the sidelink positioning reference signal, or a length of the time domain resource used for transmission of the sidelink positioning reference signal. The communication method also includes sending the sidelink positioning reference signal on the first resource.

Abstract: This application relates to a communication method, an apparatus, and a system. A first terminal device sends first information to a network device, where the first information indicates an identifier of at least one second terminal device corresponding to the first terminal device, and the identifier of the at least one second terminal device is for configuring or deconfiguring, by the network device, the first terminal device to perform multipath communication based on a non-3GPP communication interface between the first terminal device and the at least one second terminal device. Through reporting by the first terminal device, the network device can obtain the identifier of the second terminal device that communicates with the first terminal device through a non-3GPP connection, so that the network device can configure the first terminal device to implement UE aggregation with the second terminal device.

Abstract: Embodiments of this application provide a data transmission method and a communication apparatus. According to this application, a first device can determine, based on a quantity of time domain subunits occupied by a PRS, a quantity of resources of a first physical shared channel within a first frequency domain unit, and determine, based on the quantity of resources of the first physical shared channel within the first frequency domain unit, a TBS of a first TB transmitted on the first physical shared channel, to improve accuracy of the determined TBS and improve transmission performance.

Abstract: 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 sidelink radio link control (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 signaling radio bearer (SRB). The remote terminal device transmits control signaling to a network device on the at least one first SRB by using the relay terminal device.

Abstract: Embodiments of this application describe an inter-device communication method, a related device, and a system. The method includes a first device sending a first message. The first message includes one or more of the following parameters: a first parameter, a second parameter, and a third parameter. The first parameter is used to indicate that the first message is a message for announcing provision of an interactive business service. The second parameter is used to indicate an identifier corresponding to the interactive business service that can be provided by the first device. The third parameter is used to indicate a processing capability that can be provided by the first device for the interactive business service.

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: 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