Abstract: A data transmission method, including receiving, by a terminal device in a downlink control part, first downlink control information and a first downlink reference signal that are sent by a network device, receiving, by the terminal device in a first downlink data part according to the first downlink control information, first data sent by the network device, generating, by the terminal device, feedback information based on the first downlink reference signal and the first data, sending, by the terminal device, the feedback information to the network device in an uplink feedback part, and receiving, by the terminal device in a second downlink data part according to the first downlink control information, second data sent by the network device, where the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part constitute a first time unit.

Abstract: This application discloses a data sending method. The method includes: determining, by a transmit end, a first resource based on a first parameter n, where n represents a quantity of transmissions of a first information block, the first resource is used for a current transmission of the first information block, and n is greater than or equal to 0; and transmitting, by the transmit end, first data by using the first resource, where the first data is data that is obtained by processing the first information block and that is used for the current transmission, where the first resource is included in K preconfigured resources. According to the data sending method, data transmission reliability is improved.

Abstract: A channel quality indicator feedback method and device. The method includes: determining, by a terminal device, a response message of data and a channel state, where the response message includes an acknowledgement message and/or a negative acknowledgement message; determining, by the terminal device, first channel state information based on the response message of the data and the channel state; and sending, by the terminal device, the response message and the first channel state information to the network side device. According to the method and apparatus provided, reliability of downlink data from a base station can be improved.

Abstract: In a control information sending method, a network device sends first physical layer control information to a first terminal device, where the first physical layer control information indicates a first index to the first terminal device, and instructs the first terminal device to monitor second physical layer control information within a first time period. The network device sends the second physical layer control information to at least one terminal device within the first time period, where the second physical layer control information includes at least one control information field, the at least one control information field includes a first control information field, and the first control information field instructs the first terminal device to receive or send data, or the first control information field instructs the first terminal device to receive or send data or not to receive or send data.

Abstract: This application provides a data transmission method and apparatus. The method includes coding, by a terminal device, a first transport block to obtain a first coded transport block, where the first transport block includes first data; coding, by the terminal device, indication information to obtain coded indication information, where the indication information is used to indicate whether the terminal device sends a first buffer status report BSR when the terminal device sends the first data, and the first BSR indicates a data amount of to-be-transmitted data currently buffered in a buffer of the terminal device; and sending, by the terminal device, the first coded transport block and the coded indication information to a network device. According to the data transmission method and apparatus provided in embodiments of this application, the network device can directly learn whether the terminal device sends a BSR, so as to reduce a communication delay.

Abstract: This application provides a data transmission method and apparatus. A terminal device sends first data to a network device in the nth time unit, where n is an integer greater than or equal to 0. The terminal device send second data to the network device when the terminal device does not receive the response message corresponding to the first data before the (n+k)th time unit, wherein the second data is new data which is different from the first data, where k is a positive integer. According to the data transmission method provided in some embodiments of this application, the terminal device may flexibly determine the transmission mode of the second data based on an actual situation, so as to reduce a transmission delay of uplink data and improve transmission reliability of the uplink data.

Abstract: A network device sends configuration information to a terminal device, where the configuration information includes a scale factor corresponding to each aggregation level in a first aggregation level set; the network device sends DCI in a first DCI format to the terminal device, where an aggregation level corresponding to the DCI in the first DCI format is an aggregation level in the first aggregation level set. The terminal device receives the configuration information, determines, based on the scale factor corresponding to each aggregation level in the first aggregation level set, a quantity of candidate PDCCHs corresponding to each aggregation level in the first aggregation level set; the terminal device receives the DCI in the first DCI format based on the quantity of candidate PDCCHs corresponding to each aggregation level in the first aggregation level set.

Abstract: Embodiments of this application provide a control information sending method and apparatus. A network device generates first control information for a first TB, where the first TB includes n code block (CB) groups, where N is a maximum quantity of CB groups included in the first TB; each CB group includes at least one CB; the first control information includes N control information fields, and the N control information fields are in correspondence with the maximum N CB groups included in the first TB; and a control information field i in the N control information fields is used to indicate whether a CB group corresponding to the control information field i is to be sent or received, and i?[1, N]. In this way, a quantity of bits included in downlink control information can remain fixed, thereby reducing blind detection complexity of a terminal device.

Abstract: A control information communication method and apparatus, the method including receiving, by a terminal device, first control information sent by a network device, where the first control information includes first indication information and information about a first time-frequency resource that carries at least first data including a first bit obtained by encoding a first information block, and the first indication information indicates initial transmission or retransmission of the first information block, and receiving, by the terminal device, second control information sent by the network device, where the second control information includes second indication information and information about a second time-frequency resource that carries at least second data including a second bit obtained by encoding the first information block, and where the second indication information indicates that feedback information for the first information block is determined based on a result of combining and decoding the first

Abstract: A data transmission method and an apparatus are disclosed. The method includes: determining, by an access network device, a transmission mode of service data, where the transmission mode includes a one-time transmission mode and an automatic repeat transmission mode; sending, by the access network device, first indication information to a terminal device, where the first indication information indicates the determined transmission mode; and sending, by the access network device, the service data to the terminal device using the determined transmission mode.

Abstract: This application provides a downlink information transmission method and apparatus, and a device. The method includes: encoding information into a plurality of transport blocks; determining a time-frequency resource used to send each transport block; sending downlink resource indication information to user equipment, where the downlink resource indication information indicates a time-frequency resource location occupied by an Mth transport block; and sending corresponding transport blocks on the time-frequency resources. The user equipment receives the transport blocks based on the downlink resource indication information and decodes the transport blocks to obtain the information, where the downlink resource indication information indicates a resource of only one transport block. A terminal device may determine a time-frequency resource location of another transport block based on a location parameter of the another transport block, and receive and decode the another transport block.

Abstract: A downlink resource scheduling method, a terminal device and a network device are disclosed. In an embodiment a method includes receiving first pre-scheduling indication information sent by a network device, wherein the first pre-scheduling indication information is used to instruct the terminal device to receive a first downlink data channel, receiving, according to the first pre-scheduling indication information, a downlink signal sent by the network device, wherein the downlink signal sent by the network device comprises the first downlink data channel and detecting at least one piece of post-scheduling indication information in the downlink signal sent by the network device, wherein the at least one piece of post-scheduling indication information is used by the terminal device to determine a resource occupied by the first downlink data channel in the received downlink signal.

Abstract: Embodiments of this application disclose a wireless communication method, a network device, and a terminal device, to reduce receiving performance loss of a terminal device that is caused by resource reallocation. The method includes: sending, by the network device, a physical downlink control channel, where the PDCCH indicates one or more time-frequency resources scheduled by the network device; reallocating, by the network device, at least one of the time-frequency resource; and sending, by the network device, at least one piece of posterior resource indication information, where the at least one piece of posterior resource indication information indicates the reallocated time-frequency resource in the time-frequency resources.

Abstract: A method for transmitting control information, a user equipment and a network device are disclosed. In an embodiment a method for transmitting control information include receiving, by a user equipment, a first part of downlink control information in a downlink control region sent by a network device and receiving, by the user equipment, downlink data and a second part of the downlink control information in a downlink data region based on the first part of the downlink control information, wherein the downlink data and the second part of the downlink control information is sent by the network device.