Abstract: A short-distance communication method includes: obtaining at least one piece of code data; sending a scheduling type indication and a data type indication to a second device, where the scheduling type indication indicates that the at least one piece of code data includes initially transmitted data, retransmitted data, or initially transmitted data and retransmitted data, and the data type indication indicates location information and/or an amount of a part or all of the at least one piece of code data; and sending the at least one piece of code data to the second device.

Abstract: A Mach-Zehnder (MZ) modulator includes a splitter, two modulation arms, and a coupler. The two modulation arms include two optical transmission waveguides and two electrodes. The splitter is configured to perform power splitting on an optical carrier to obtain two optical carriers and input the two optical carriers to corresponding input ports of the two optical transmission waveguides, respectively. The two electrodes include a first electrode and a second electrode which are respectively configured to receive two differential electrical signals and apply the two differential electrical signals to the two optical transmission waveguides to change phases of the two optical carriers. Two input ends of the coupler are connected to output ports of the two optical transmission waveguides, respectively, and are configured to perform interference on the optical carriers whose phases are changed via the two modulation arms and output the optical carriers.

Abstract: A terminal device determines a resource of a physical uplink control channel. The physical uplink control channel carries a first encoded bit sequence and a second encoded bit sequence, the first encoded bit sequence is corresponding to first uplink control information, and the second encoded bit sequence is corresponding to second uplink control information. The resource for the physical uplink control channel includes N orthogonal frequency division multiplexing (OFDM) symbol sets. The first encoded bit sequence is carried in an OFDM symbol included in j OFDM symbol sets, the j OFDM symbol sets are a part of or all of of the N OFDM symbol sets, where j is a positive integer less than or equal to N. The terminal device sends, on the resource for the physical uplink control channel, a signal that is generated based on the first uplink control information and the second uplink control information.

Abstract: A communication method includes: receiving first indication information, wherein the first indication information indicates radio frequency chain switching; and sending a first uplink transmission, wherein the first uplink transmission comprises information about a power headroom, and the power headroom is determined based on at least one of a first power class or a second power class, wherein the first power class corresponds to an uplink transmission after the radio frequency chain switching, the second power class corresponds to an uplink transmission before the radio frequency chain switching, and the first uplink transmission is the uplink transmission after the radio frequency chain switching.

Abstract: A communication method and apparatus are provided. A first terminal device sends a first vehicle to everything (V2X) service based on a first layer 2 address pair, and sends a second V2X service based on a second layer 2 address pair. Both a destination layer 2 address in the first layer 2 address pair and a destination layer 2 address in the second layer 2 address pair correspond to a terminal device group. A transmission configuration of the first V2X service is different from a transmission configuration of the second V2X service. Because the first terminal device allocates V2X services with different transmission configurations to different destination group L2 addresses, discontinuous reception (DRX) can be enabled for some V2X services, to effectively save power of the first terminal device, and DRX can be disabled for some V2X services, to meet a quality of service (QoS) requirement of V2X services.

Abstract: A clock synchronization method, a device, and a system are provided. The method includes: A first device receives first information sent by a second device, where the first information includes second clock domain identification information. The first device updates clock domain identification information of the first device to the second clock domain identification information and sends a first synchronization request to the second device when quality of a signal between the first device and a second master device meets a first condition. The first device receives a first synchronization indication from the second device, where the first synchronization indication includes the second clock domain identification information and a first moment at which the second device sends the first synchronization indication. The first device synchronizes a clock of the first device to a second clock based on the second clock domain identification information and the first moment.

Abstract: A terminal device camps on a first cell in an idle state or an inactive state. The terminal device measures the first cell based on a first non-cell defining synchronization signal/physical broadcast channel block (NCD-SSB) frequency, and measures a second cell based on the first NCD-SSB frequency and/or a cell defining synchronization signal/physical broadcast channel block (CD-SSB) frequency. The terminal device performs cell reselection based on a measurement result of the first cell and a measurement result of the second cell.

Abstract: This application provides a communication method and apparatus. The method includes: receiving first information; determining N modes from M modes based on the first information, where N is an integer greater than 0, M is an integer greater than or equal to N, and the M modes include one or more of a first mode, a second mode, and a third mode; and sending a transport block in one of the N modes. A transmission mode of at least one antenna panel on a terminal device is accurately indicated by indication information.

Abstract: A communication method and apparatus. One method includes: a session management network element obtains an identifier of a DN accessed by a terminal device and/or an identifier of a network slice accessed by the terminal device. The session management network element determines, based on the identifier of the DN and/or the identifier of the network slice, a service type requested by the terminal device. The session management network element requests, from an access network device on a satellite, tunnel information corresponding to the service type. The session management network element receives, from the access network device, the tunnel information corresponding to the service type.

Abstract: This application discloses a device collaboration method. A first electronic device establishes a collaboration connection to a second electronic device. The first electronic device obtains a first instance attribute of a first data object and a second instance attribute of a second data object. The first electronic device sends the first instance attribute to the second electronic device through a first session, and sends the second instance attribute to the second electronic device through a second session. In this way, two data objects that are the same on the first electronic device and the second electronic device are associated with a same session identifier. The first electronic device may monitor attribute changes of data objects of different types, and send only a data object whose attribute changes to the second electronic device.

Abstract: Embodiments of this application provide a beam failure recovery method and apparatus, and a system. The method includes: After a beam failure occurs on a first beam on a first carrier, a first terminal device activates resources of candidate beams on the first carrier. The first beam is a beam used for communication between the first terminal device and a second terminal device. The first terminal device communicates with the second terminal device based on a second beam. The second beam is one of the candidate beams. The beam failure recovery method and apparatus, and the system can reduce overheads of a beam failure recovery procedure in a sidelink system.

Abstract: A method includes: forming, on a substrate (10), an epitaxial layer (11) and a source conducting layer (21), where the epitaxial layer includes a first via, to form a first epitaxial layer (101) of the first transistor and a second epitaxial layer (102) of the second transistor; the source conducting layer includes a first source (211) of the first transistor and a second source (212) of the second transistor; and an edge of the first source (211) is flush with an edge of the first epitaxial layer (101) close to a side of the first via, and an edge of the second source (212) is flush with an edge of the second epitaxial layer (102) close to a side of the first via; forming a first conducting layer (13) in the first via; forming a second via; and forming a second conducting layer (14) in the second via.

Abstract: This application relates to the field of antenna technologies, and in particular, to an antenna assembly. The antenna assembly includes a first antenna array element, a second antenna array element, and a filtering structure. The first antenna array element supports receiving in a first frequency band, and the second antenna array element supports transmitting in a second frequency band. The filtering structure includes at least one of a first filtering structure and a second filtering structure. The first filtering structure is disposed on the first antenna array element, and the second filtering structure is disposed on the second antenna array element. Isolation of the antenna assembly is high.

Abstract: A communication method and an apparatus to reduce signaling overheads in a registration process of a terminal device. The method includes: receiving a registration request from a read/write device, sending a transmission request to an application network element, and notifying the read/write device of a registration success. The registration request includes identification information of the terminal device, the registration request is used to request to register the identification information with a network, the transmission request includes the identification information, and the transmission request is used to request to transmit the identification information to the application network element.

Abstract: This application discloses a secondary cell activation method and an apparatus, and relates to the communication field, so that a terminal device can report a channel state information measurement result in a secondary cell activation phase to a network device. The secondary cell activation method includes: A terminal device receives first indication information, where the first indication information is used to indicate an uplink resource for reporting a channel state information measurement result in a secondary cell activation phase; and the terminal device sends the channel state information measurement result to a network device based on the first indication information.

Abstract: In an application development system, a first electronic device sends an original installation package of a target application to a server. The original installation package of the target application indicates a function and/or a page layout corresponding to at least one type of device information. The server determines at least one target installation package based on the original installation package. The at least one target installation package one-to-one corresponds to the at least one type of device information. The server receives a first download request sent by a second electronic device, and sends a first installation package to it; the server receives a second download request sent by a third electronic device, and sends a second installation package to it. The first installation package and second installation package are a target installation package corresponding to device information of the second electronic device and third electronic device respectively.

Abstract: Embodiments of this application disclose a baseband unit (BBU) and an access network device. The BBU includes M lasers, M switches (SWs), M photodetectors (PDs), an arrayed waveguide grating (AWG), M transmit ports, and M receive ports, where M is an integer greater than or equal to 2. An ith laser is coupled to an input end of an ith SW, an upper output end of the ith SW is coupled to an ith transmit port, and the AWG is separately coupled to lower output ends of the M switches SWs, the M PDs, and the M receive ports, where i=1, 2, . . . , or M. When a networking mode used by the BBU needs to be changed, an optical module or a component in the BBU does not need to be replaced, so that applicability, universality, and flexibility of the BBU can be improved.

Abstract: A computer-implemented method for video data communication in a network includes receiving, by a node in the network, an Internet protocol (IP) data packet. The IP data packet includes an IP network layer header and an IP network layer payload. The IP network layer payload is parsed, by the node, to detect a Network Abstraction Layer Unit (NALU). The NALU includes a NALU header and a NALU payload. Priority information in the NALU header is detected by the node. The priority information indicates a transport priority of the NALU. A differentiated services (DS) field in the IP network layer header is updated based on the transport priority to generate an updated IP data packet. The updated IP data packet is forwarded to a second node in the network for discarding or processing based on the updated DS field.

Abstract: Embodiments of this application provide a sidelink management method, an apparatus, and a system. The method includes: A first terminal device repeatedly sends first request information to a second terminal device via a plurality of first to-be-selected beams, where the first request information is used to trigger a connection to the second terminal device; the first terminal device receives first feedback information from the second terminal device via the plurality of first to-be-selected beams, where the first feedback information is used to provide feedback on the first request information; and the first terminal device determines a first beam based on the first feedback information, where the first beam is one of the plurality of first to-be-selected beams. The sidelink management method, the apparatus, and the system can less limit a link establishment distance between terminal devices, and improve a sidelink establishment success rate.

Abstract: This disclosure provides a communication method and a communication apparatus. In some aspects, a network device receives first indication information from a core network device, where the first indication information indicates the network device to trigger, after receiving uplink data from a first terminal device, a second terminal device to access the network device. After the network device receives first uplink data from the first terminal device, the network device triggers the second terminal device to access the network device. According to the method, complexity of data transmission and processing procedures of an inventory taking procedure transplanted to a cellular network can be reduced, so that an inventory taking rate of terminal devices and a communication capacity of a system are effectively improved.