Abstract: A communication method and apparatus are provided. The method includes: A first node determines a sending time point of a second PDCP PDU based on first sending status information from a second node, where the first sending status information is associated with a first PDCP PDU, so that the first node can adjust the sending time point of the second PDCP PDU based on a sending situation of the first PDCP PDU, to avoid too many packet losses caused when a MAC PDU of the second PDCP PDU is not completely sent in a timely manner due to splitting and concatenation, so as to improve reliability of a synchronous data transmission mechanism in an NR system, and improve resource utilization.

Abstract: This application discloses a multicast transmission method. The multicast transmission method includes: a first network device receives a first data packet and first indication information, where the first indication information indicates a sequence of the first data packet in at least one data packet; the first network device sets a sequence number of a first protocol layer of the first data packet based on the first indication information; and the first network device sends the first data packet to a terminal device. In this way, all data packets received by the terminal device include corresponding sequence numbers of the first protocol layers.

Abstract: The present disclosure provides a stage-by-stage hydraulic design method for impellers of a multistage gas-liquid multiphase pump, including the following steps: determining design parameters of the multistage gas-liquid multiphase pump; determining pressurization coefficients of different pressurization stages for the multistage gas-liquid multiphase pump, determining hydraulic design parameters of the different pressurization stages, including volumetric flow rates and pressurization values of the different pressurization stages, stage by stage according to the pressurization coefficients of the different pressurization stages; determining parameters of the impellers of various stages according to gas contents of the impellers of the different pressurization stages; and establishing an impeller model of the multistage gas-liquid multiphase pump according to the parameters of the impellers of the various stages.

Abstract: A communication method and apparatus, wherein a first identity of a first service is obtained, and a first paging occasion is determined based on the first identity, where the first paging occasion is used by the terminal device to receive a first message, and the first message is used to page the terminal device. The first paging occasion is determined based on the first identity, so that the network device pages, on the first paging occasion, a plurality of terminal devices that is to receive data of the first service.

Abstract: A communication method, an access network device, a terminal device, and a core network device where the terminal device is handed over from a first access network device to a second access network device, the second access network device learns of first service progress of the first access network device based on a first sequence number of a data packet forwarded by the first access network device, without introducing additional progress exchange information between the two access network devices.

Abstract: A locking buckle includes first and second fixing elements opposite to each other, and a fastening element rotatably connected to the first fixing element through a rotation shaft, with a locking bar being arranged on a side thereof away from the rotation shaft, a receiving room formed between the locking bar and the rotation shaft, a limiting bar arranged on a side of the second fixing element away from the first fixing element. When rotating the fastening element to a maximum rotation angle thereof, the first and second fixing elements abut against each other and partially received in the receiving room, the locking bar clamped with the limiting bar to fix the first and second fixing elements. The first and second fixing elements respectively provide a hole and a protrusion, the fastening bar including a cover detachably fixed on the fastening element and provided with patterns or characters for identification purposes.

Abstract: This application relates to the communication field, and discloses a communication method and apparatus. The method includes: A first network device sends a radio resource control (RRC) release message to a terminal device that joins a multicast session, where the RRC release message indicates that the terminal device is to be released to a non-connected state. The first network device sends indication information to a second network device, where the indication information indicates whether a multicast and broadcast radio bearer needs to be reconfigured for the terminal device. Based on the indication information, the second network device reconfigures the multicast and broadcast radio bearer for the terminal device, or does not reconfigure the multicast and broadcast radio bearer for the terminal device.

Abstract: This application provides a handover method and a related apparatus, so that an access network device can release a buffer in time, to improve resource utilization. The method includes: A first access network device sends a first handover request message, where the first handover request message includes a sequence number of a last first data packet in at least one first data packet. The first access network device sends at least one second data packet. The first access network device sends a second sequence number, where the second sequence number is a sequence number of a last second data packet in the at least one second data packet sent to the terminal.

Abstract: This application provides a communication method and a communication apparatus. The method includes: A serving base station sends a first indication message, where the first indication message indicates that access of a mobile satellite service (MSS) terminal to a cell is not allowed or access of the MSS terminal to a frequency band corresponding to the cell is not allowed. According to the method provided in this application, when a frequency band corresponding to a fixed satellite services (FSS) terminal is reused by the MSS terminal, to avoid a case that the MSS accesses a non-permitted frequency band, the MSS terminal may reject access to the cell based on the first indication information. This resolves a problem in related technologies that when the frequency band corresponding to the FSS terminal is reused by the MSS terminal, the MSS terminal may access a non-permitted frequency band.

Abstract: In an indication information receiving method, a first terminal device receives first indication information from a first network device, and sends information about at least one HARQ process of the first terminal device to the first network device based on the first indication information, where the information about the at least one HARQ process includes a process number of a first HARQ process. The first terminal device receives first data from the first network device through the first HARQ process. This can improve reliability during data transmission.

Abstract: This invention relates to the field of biomedicine and specifically to a porcine interferon-like recombinant protein and its applications. By constructing and screening a PoIFN-? DNA shuffling bacterial library, a highly active recombinant protein Porferon was obtained. Porferon exhibits potent anti-infective activity against a broad range of porcine pathogens, including viruses, bacteria, and parasites. Its biological activity is significantly superior to that of natural porcine interferon. As such, Porferon can be used in the development of therapeutics for the prevention or treatment of infectious diseases in pigs, offering a novel and effective solution for clinical applications in veterinary medicine.

Abstract: Embodiments of this application disclose a random access method and apparatus. In one example method, when a terminal device supports positioning, the terminal device may adjust, based on a positioning capability, time for sending a preamble on a RACH Occasion (RO) resource. When the terminal device does not support positioning, a corresponding RO resource periodicity may be configured to be large. Therefore, regardless of whether the terminal device supports positioning, a network device can receive, at the same time or in a short preamble receiving time window, preambles sent on a same RO resource, and receive, at different time, in different small time ranges, or in different short preamble receiving time windows, preambles sent on different RO resources.

Abstract: A camera, consisting of a housing and an image sensor contained in the housing. The camera also has objective optics, which are coupled to the housing and which have an optical axis and which are configured to form an image on the image sensor. There is a mount, fixed within the housing, that has a frame, which holds the image sensor and is configured to rotate about the optical axis. The mount also has an actuator, which is configured to drive the frame to rotate about the axis. A controller is coupled to receive a signal indicative of a rotation of the housing about the optical axis and to drive the actuator to apply an opposing rotation to the frame.

Abstract: A method, a device, a storage medium, and electronic equipment for detecting pipe wall dirt are provided. In the above, the electronic equipment acquires a first receiving amount of a target pipeline for first light quanta currently; acquires a second receiving amount of the target pipeline for the first light quanta at a reference moment; and obtains an increased dirt thickness of the target pipeline in a target time period according to the first receiving amount and the second receiving amount, wherein the target time period represents a time length from a current moment to the reference moment.

Abstract: The present disclosure discloses a wireless audio transmission method and device. Communication between a central device and a peripheral device is based on at least one primary transmission link and at least one secondary transmission link within consecutive isochronous intervals. The primary transmission link is configured to transmit a primary audio data stream, and the secondary transmission link is configured to transmit a secondary audio data stream. The primary transmission link has a higher transmission priority than the secondary transmission link. Within one isochronous interval, transmission of one or more secondary audio data packets on the secondary transmission link is then performed within one or more second subevent intervals after transmission of one or more primary audio data packets on the primary transmission link is completed within one or more first subevent intervals and upon determining that that the current isochronous interval has one or more remaining time slots.

Abstract: The present disclosure relates to communication methods and communication apparatuses. In one example communication method, a transmit end sends a MAC subPDU to a receive end, where an RRC message included in the MAC subPDU includes one or more of a UL CCCH message, a UL CCCH1 message, or a UL DCCH message. A header of the MAC subPDU includes an LCID field. The transmit end may perform, by using the LCID field, transmission of indication information for auxiliary communication. In addition, the MAC subPDU further includes a first field, and when values of the first field are different, meanings represented by the LCID field are determined based on different LCID tables. The first field is carried in the MAC subPDU.

Abstract: The present disclosure provides a communication method and apparatus for a wireless battery management system. The wireless battery management system comprises one central device and a plurality of peripheral devices. The communication method comprises: the central device and the plurality of peripheral devices form a point-to-multipoint bidirectional communication link; when the bidirectional communication link is a periodic advertising with hierarchical responses link, each periodic advertising interval in the bidirectional communication link comprises a plurality of subevent sets, and the plurality of subevent sets comprise at least two target subevent sets, each target subevent set containing at least one subevent, and each subevent being configured with a plurality of response slots. Among the at least two target subevent sets, response slot spacings of different target subevent sets are different, and/or response slot delays of different target subevent sets are different.

Abstract: Embodiments of this application provide a method for reporting a timing advance and a communication apparatus, to implement reporting of the timing advance in a cell handover process. The method includes: receiving a handover command from an access network device, where the handover command indicates a terminal device to be handed over from a source cell to a target cell; and triggering the reporting of the timing advance when the handover command carries first indication information and/or second indication information, where the timing advance is a timing advance corresponding to the target cell, the first indication information indicates an offset threshold of the timing advance reported by the terminal device, and the second indication information indicates the terminal device to report the timing advance.

Abstract: A CO2 trans-critical freezing system includes: a freezing subsystem, including a first liquid inlet pipe and a first liquid return pipe arranged above the stratum and configured to convey low-temperature liquid CO2 to the stratum for stratum freezing construction; a liquefaction subsystem, configured to compress a volume of normal-temperature gaseous CO2, so that movement of molecules between the gaseous CO2 is limited and reduced, and the gaseous CO2 is converted into the low-temperature liquid CO2; and an inlet and return pipeline subsystem. A CO2 medium used in the system effectively solves problems of flammability, explosion hazard, high risk, difficult disposal, and environmental pollution caused by liquid ammonia and brine used in conventional freezing construction.

Abstract: This application provides a communication method, apparatus, and system. The communication method includes: a centralized unit receives a data packet sent in a multicast manner. The centralized unit generates a packet data convergence protocol (PDCP) data unit based on the data packet, where the PDCP data unit includes the data packet and a PDCP header. The centralized unit sends the PDCP data unit to a distributed unit. The distributed unit receives the PDCP data unit from the centralized unit, where the PDCP data unit includes the PDCP header, a synchronization protocol header, and a payload. The distributed unit generates a media access control (MAC) data unit, where the MAC data unit includes a MAC header, an RLC header, the PDCP header, and the payload.