Abstract: A random access method and apparatus are provided. The method includes sending, by a first terminal side device, a random access preamble to a network side device, receiving, by the first terminal side device, a random access response (RAR) corresponding to the random access preamble, where the RAR includes P temporary cell radio network temporary identifiers (TC-RNTIs), and P is an integer greater than 1, and sending, by the first terminal side device to the network side device based on the RAR, a first message and a demodulation reference signal used to demodulate the first message, where the demodulation reference signal is generated based on a first TC-RNTI, and the first TC-RNTI is one of the P TC-RNTIs.

Abstract: A video service transmission method and apparatus in the field of communications technologies are provided, where data in a video data frame can be split into at least two substreams based on a mapping relationship between data importance and a substream. The data of the at least two substreams may then be mapped, based on port numbers corresponding to the at least two substreams, to bearers corresponding to the at least two substreams, for transmission. Because a network can use different processing methods for data on different bearers, reliable transmission of video data frames of high importance can be ensured with priority by using the video service transmission method and apparatus, so as to improve service experience of video users in a scenario of constrained transmission resources.

Abstract: Embodiments of this application provide a sounding reference signal (SRS) transmission method, apparatus, and system, so as to implement sounding reference signal BP-based switching. The method includes: determining that a transmission conflict occurs between a sounding reference signal (SRS) on a first bandwidth part (BP) and an SRS on a second BP; and discarding the SRS on the first BP, where a priority of the SRS on the first BP is lower than a priority of the SRS on the second BP.

Abstract: A communications method and apparatus are provided. The method includes: receiving, by a terminal device, a first message from a network device, where the first message includes first offset information, or the first message includes second offset information, or the first message includes the first offset information and the second offset information; the first offset information is used to indicate a time offset value of a random access response RAR monitoring window for monitoring a RAR; and the second offset information is used to indicate a time offset value for sending a second message, and the second message is a message sent by the terminal device based on the RAR; and randomly accessing, by the terminal device, the network device based on the first message.

Abstract: A fuel cell including an electrochemical reactor; a cooling circuit; a controller; a coolant circuit; a first temperature sensor; and a second temperature sensor. The cooling circuit includes a cooling pipe, a water pump, a radiator, a heater, and a thermostatic three-way valve. The cooling circuit is configured to cool the electrochemical reactor. The controller is configured to control operations of the electrochemical reactor and the cooling circuit. The cooling pipe includes a first water inlet and a first water outlet; and the coolant circuit is disposed between the first water inlet and the first water outlet. The first temperature sensor is disposed at the first water inlet. The second temperature sensor is disposed at the first water outlet. The first temperature sensor and the second temperature sensor are configured to detect and transmit temperature data of a coolant in the cooling pipe to the controller.

Abstract: The application relates to allocating transmission resources in communication networks that provide low latency services. A terminal receives, from a base station time-frequency resource division information, which indicates a division of a time-frequency resource that is allowed to be used by another service. The division of the time-frequency resource includes one or more resource units in time domain and one or more resource units in frequency domain. The terminal further receives from the base station time-frequency resource indication information, which indicates that, in the time-frequency resource that is allowed to be used by the other service, at least one time domain resource unit and at least one frequency domain resource unit are occupied by the other service. The terminal communicates with the base station using the time-frequency resource except the at least one time-domain resource unit and at least one frequency-domain resource unit that are occupied by the other service.

Abstract: Embodiments of the present application provide a data transmission method. The method includes: sending, by user equipment, uplink data to a base station by using an uplink user equipment relay; and receiving, by the user equipment, downlink data from the base station, or receiving, by the user equipment, downlink data from the base station by using a downlink user equipment relay. Uplink transmission and downlink transmission are separately performed in different transmission paths, so as to reduce impact of a fault of a user equipment relay on a network, and improve network reliability.

Abstract: This application discloses a data transmission method. The method includes: obtaining a baseline value, wherein the baseline value indicates a time interval between a downlink frame timing and an uplink frame timing, and is associated with a timing advance for sending uplink data; and receiving the uplink data. This application further provides a base station and user equipment.

Abstract: A melting pot includes a pot body and a float salvaging apparatus. The pot body is provided with a melting chamber having an open upper end. The float salvaging apparatus includes a hanging bracket, a bearing plate, a rotating plate and a drive assembly configured to drive pivoting of the rotating plate. The hanging bracket is disposed above the melting chamber. The rotating plate is pivotably disposed on the bearing plate, and the bearing plate and the rotating plate are provided on the hanging bracket between an initial position and a first salvaging position in a manner of moving up and down. The drive assembly is connected to the rotating plate.

Abstract: A resource allocation method to resolve a problem that a transport block of a typical enhanced voice service (EVS) scenario in an air interface is much smaller than a transport block of a conventional adaptive multi rate (AMR), and use of a resource allocation method in the existing long term evolution (LTE) causes a waste of user spectrum resources such that spectrum utilization in an EVS scenario can be improved. The method includes determining resource allocation information and resource allocation block indication information, where the resource allocation information includes information indicating at least one fractional resource block (FRB) allocated to user equipment, and the resource allocation block indication information indicates that a resource allocation block is the FRB, where a resource occupied by the FRB is less than one RB, and notifying the user equipment of the resource allocation information and the resource allocation block indication information.

Abstract: A resource request method and system, a device, and a network side node are provided. The method includes the following steps: A target device sends a first target device message to a relay device. When receiving the first target device message, the relay device sends a first relay device message to a network side node according to the first target device message. The network side node receives the first relay device message, and sends first grant information to the target device according to the first relay device message. The first grant information includes a data transmission resource allocated by the network side node to the target device. According to embodiments of the present disclosure, energy consumption of a sending device, that is, a target device, can be reduced while the sending device obtains a transmission resource.

Abstract: A downlink transmission method and a corresponding base station and terminal are provided. In some feasible implementations, a base station sends downlink control information to a terminal in a subframe n+k, where the downlink control information includes indication information and a HARQ process identification, the indication information is used to indicate a location of at least one OFDM symbol in data that is sent by the base station to the terminal in a subframe n, the HARQ process identification in the downlink control information is the same as a HARQ process identification in the subframe n, and both n and k are natural numbers; and the base station transmits, in the subframe n+k, at least data that is sent to the terminal and that is on the at least one OFDM symbol that is in the subframe n and that is indicated by the indication information.

Abstract: Embodiments provide a communication method, a network device, and a terminal device. Under the method, a network device can send SRS configuration information of a first transmission resource and of a second transmission resource to a terminal device. The first transmission resource is a switching source carrier or bandwidth part. The second transmission resource is a switching destination carrier or bandwidth part. The SRS configuration information of the first and second transmission resource includes a first OFDM symbol set and a second OFDM symbol set respectively. Some and all symbols in the first set and second set may be used by the terminal device to send an SRS on the first and second transmission resource respectively. In various embodiments, the network device configures one or more symbols for the terminal device to transmit an SRS, so that high-frequency channel measurement can be better supported.

Abstract: Embodiments of this application provide a sounding reference signal (SRS) transmission method, apparatus, and system, so as to implement sounding reference signal BP-based switching. The method includes: determining that a transmission conflict occurs between a sounding reference signal (SRS) on a first bandwidth part (BP) and an SRS on a second BP; and discarding the SRS on the first BP, where a priority of the SRS on the first BP is lower than a priority of the SRS on the second BP.

Abstract: The present invention relates to the field of wireless communications technologies, and provides a method for transmitting a carrier, a base station, user equipment, and a system. The method discloses: sending, by a base station, a second carrier, where the second carrier at least partially shares a same resource area with a first carrier, the resource area includes a plurality of resource elements, and the first carrier and the second carrier occupy different resource elements; and sending, by the base station, blank resource element indication information to user equipment that receives the second carrier, where the blank resource element indication information is used to indicate a position of a resource element occupied by the first carrier in the shared resource area. According to the solutions provided in the embodiments, a resource utilization rate of a communications system is improved, and interference between carriers is avoided.

Abstract: Embodiments of the present invention provide an uplink transmission method and an apparatus. When a first data packet and a second data packet are simultaneously transmitted, UE maps the first data packet to a first time-frequency resource of a time-frequency resource block, maps the second data packet to a second time-frequency resource of the time-frequency resource block, sends the first data packet and the second data packet by using different time-frequency resources of the same time-frequency resource block, and feeds back a receiving result of the first data packet and the second data packet by using a new feedback mechanism. In this way, a conflict between an initially transmitted data packet and a retransmitted data packet in an SPS scenario can be avoided, and time-frequency resources can be more effectively used.

Abstract: The application relates to allocating transmission resources in communication networks that provide low latency services. A terminal receives, from a base station time-frequency resource division information, which indicates a division of a time-frequency resource that is allowed to be used by another service. The division of the time-frequency resource includes one or more resource units in time domain and one or more resource units in frequency domain. The terminal further receives from the base station time-frequency resource indication information, which indicates that, in the time-frequency resource that is allowed to be used by the other service, at least one time domain resource unit and at least one frequency domain resource unit are occupied by the other service. The terminal communicates with the base station using the time-frequency resource except the at least one time-domain resource unit and at least one frequency-domain resource unit that are occupied by the other service.

Abstract: A video service transmission method and apparatus in the field of communications technologies are provided, where data in a video data frame can be split into at least two substreams based on a mapping relationship between data importance and a substream. The data of the at least two substreams may then be mapped, based on port numbers corresponding to the at least two substreams, to bearers corresponding to the at least two substreams, for transmission. Because a network can use different processing methods for data on different bearers, reliable transmission of video data frames of high importance can be ensured with priority by using the video service transmission method and apparatus, so as to improve service experience of video users in a scenario of constrained transmission resources.

Abstract: A resource request method and system, a device, and a network side node are provided. The method includes the following steps: A target device sends a first target device message to a relay device. When receiving the first target device message, the relay device sends a first relay device message to a network side node according to the first target device message. The network side node receives the first relay device message, and sends first grant information to the target device according to the first relay device message. The first grant information includes a data transmission resource allocated by the network side node to the target device. According to embodiments of the present disclosure, energy consumption of a sending device, that is, a target device, can be reduced while the sending device obtains a transmission resource.

Abstract: A downlink transmission method and a corresponding base station and terminal are provided. In some feasible implementations, a base station sends downlink control information to a terminal in a subframe n+k, where the downlink control information includes indication information and a HARQ process identification, the indication information is used to indicate a location of at least one OFDM symbol in data that is sent by the base station to the terminal in a subframe n, the HARQ process identification in the downlink control information is the same as a HARQ process identification in the subframe n, and both n and k are natural numbers; and the base station transmits, in the subframe n+k, at least data that is sent to the terminal and that is on the at least one OFDM symbol that is in the subframe n and that is indicated by the indication information.