Abstract: A communication method and apparatus are provided, so that a terminal device determines whether DCI obtained through monitoring is repeatedly transmitted on a PDCCH or individually transmitted on a PDCCH. A network device determines first configuration information based on a first condition, and sends the first configuration information to a first terminal device. The first configuration information includes information indicating the first terminal device to monitor a PDCCH candidate based on a span, and includes configuration information of a first PDCCH candidate and a second PDCCH candidate.

Abstract: A communication method includes: a first device determines first control information, where the first control information carries first information, and the first information is used to indicate emergency information; and the first control information is format-3 control information, format-3A control information, format-6-0A control information, format-6-0B control information, format-6-1A control information, or format-6-1B control information; the first device sends the first control information to a second device; and the first device sends the emergency information to the second device. The method expands coverage of a network, and may be applied to an internet of things (IoT), for example, machine type communication (MTC), a long term evolution-machine (LTE-M), or machine-to-machine (M2M).

Abstract: A communication method includes detecting, by a terminal device, downlink control information (DCI) on at least one of a first physical downlink control channel (PDCCH) candidate or a second PDCCH candidate. The communication method also includes, in response to determining the at least one of the first PDCCH candidate or the second PDCCH candidate is associated with another PDCCH candidate, determining, by the terminal device, a reference PDCCH candidate based on the first PDCCH candidate, the second PDCCH candidate, and the another PDCCH candidate. The reference PDCCH candidate is used to determine at least one of time-frequency-space domain transmission resource information indicated by the DCI, uplink transmit power information indicated by the DCI, or uplink feedback information corresponding to the DCI.

Abstract: This application provides a radio resource measurement method and apparatus. The method includes: determining frequency domain resources of a narrowband on which an RSS pilot is located, where the RSS pilot occupies a part of the frequency domain resources of the narrowband; and determining, based on the frequency domain resource of the narrowband, a first radio resource measurement result corresponding to the RSS pilot. According to the method, UE can determine, based on the frequency domain resource of the narrowband occupied by the RSS pilot, the first radio resource measurement result corresponding to the RSS pilot.

Abstract: Embodiments of this application disclose a data transmission method, a control information sending method, and a device, and relate to the field of communications technologies. The method may include: determining, by the communications device, a first resource used for receiving or sending data; receiving control information, where the control information includes first indication information that can be used to indicate that a resource is punctured or postponed, and where the first indication information is used to indicate that a second resource is punctured or postponed; and determining, by the communications device, a third resource based on the first indication information and the first resource, and receiving or sending the data by using the third resource.

Abstract: Embodiments of this application disclose a data transmission method, a control information sending method, and a device, and relate to the field of communications technologies. The method may include: determining, by the communications device, a first resource used for receiving or sending data; receiving control information, where the control information includes first indication information that can be used to indicate that a resource is punctured or postponed, and where the first indication information is used to indicate that a second resource is punctured or postponed; and determining, by the communications device, a third resource based on the first indication information and the first resource, and receiving or sending the data by using the third resource.

Abstract: This application discloses a data transmission method and an apparatus. The method includes: A network device generates downlink control information DCI. The DCI indicating a first modulation scheme or a second modulation scheme. The DCI includes a modulation and coding scheme MCS field. The DCI indicates the first modulation scheme when the MCS field is in a first state, or the DCI indicates the second modulation scheme and an MCS index of the second modulation scheme when the MCS field is in a second state. The network device sends the DCI. A terminal receives the downlink control information DCI, and receives or sends data based on the DCI. In embodiments of this application, the first modulation scheme, the second modulation scheme, and the MCS index of the second modulation scheme are indicated by using different states in the MCS field, to support a new modulation scheme without increasing DCI overheads.

Abstract: A signal demodulation method, a signal transmission method, and a related apparatus. The signal demodulation method includes: a terminal device receives a first tracking reference signal from a first transmission reception apparatus of a single frequency network cell; a second tracking reference signal occupying different time-frequency from the first tracking reference signal from a second transmission reception apparatus of the single frequency network cell; and receives indication information indicating tracking reference signals from the first transmission reception apparatus or the second transmission reception apparatus; determines, based on the one or more tracking reference signals for receiving the downlink signal, a first carrier frequency on which the downlink signal is to be received; receives the demodulation reference signal and the downlink data based on the first carrier frequency; and demodulates the downlink data based on the demodulation signal.

Abstract: A communication method includes receiving downlink control information (DCI), wherein the DCI is useable to indicate a second delay of uplink feedback information of a physical downlink shared channel scheduled by a physical downlink control channel, determining the second delay based on the-DCI, and sending, on a last uplink bandwidth reduced low complexity-coverage enhancement (BL/CE) subframe of Z uplink BL/CE subframes based on the second delay, the uplink feedback information corresponding to the physical downlink shared channel. The second delay includes the following subframes in sequence Y-Z-1 downlink (BL/CE) subframes, one subframe, and the Z uplink BL/CE subframes. Y is an integer greater than or equal to 4 and less than or equal to 13, and Z is an integer equal to 1, 2, or 3.

Abstract: This application provides a communication method and apparatus. The communication method includes: adding a modulation coding scheme whose modulation order is 10 for communication between a network device and a terminal device, to improve communication efficiency of the terminal device in an area with better channel quality, including a central area.

Abstract: This application provides a data transmission method and a communications apparatus. The method includes: receiving uplink resource configuration information including information about at least two uplink reference points, and one uplink reference point corresponds to one uplink carrier; and determining, based on the uplink resource configuration information, an uplink carrier on which an uplink transmission resource is located.

Abstract: A signal demodulation method, a signal transmission method, and a related apparatus. The signal demodulation method includes: a terminal device receives a first tracking reference signal from a first transmission reception apparatus of a single frequency network cell; a second tracking reference signal occupying different time-frequency from the first tracking reference signal from a second transmission reception apparatus of the single frequency network cell; and receives indication information indicating tracking reference signals from the first transmission reception apparatus or the second transmission reception apparatus; determines, based on the one or more tracking reference signals for receiving the downlink signal, a first carrier frequency on which the downlink signal is to be received; receives the demodulation reference signal and the downlink data based on the first carrier frequency; and demodulates the downlink data based on the demodulation signal.

Abstract: A carrier frequency tracking method, a signal transmission method, and a related apparatus. The carrier frequency tracking method includes: a terminal device receives a first tracking reference signal from a first transmission reception apparatus of a single frequency network cell; the terminal device receives a second tracking reference signal from a second transmission reception apparatus of the single frequency network cell, where the first tracking reference signal and the second tracking reference signal occupy different time-frequency resources; and the terminal device performs carrier frequency tracking based on at least one of the first tracking reference signal and the second tracking reference signal.

Abstract: A gap determining method includes: A terminal device receives first configuration information and second configuration information from a network device. The terminal device receives scheduling information from the network device. The terminal device determines a downlink gap of the first channel based on the first configuration information. The terminal device determines a first gap between the N transport blocks based on the second configuration information. When the terminal device determines that a preset condition is satisfied, the terminal device determines that a gap part that is included in the first gap and that overlaps with the downlink gap is postponed in time domain and that a gap part obtained through postponing does not overlap with the downlink gap; or when the first gap includes a gap part that overlaps with the downlink gap, the terminal device determines that the gap part belongs to the downlink gap.

Abstract: Embodiments provide an information processing method and a terminal device, so that a network device can indicate a reserved resource, and the terminal device can process the reserved resource. In these embodiments, configuration information of a reserved resource sent by a network device can be received by a terminal device. The terminal device can determine, based on the configuration information of the reserved resource, that a resource type of the reserved resource is a first-type reserved resource or a second-type reserved resource. The terminal device can determine a radio frequency processing manner on the reserved resource based on the resource type.

Abstract: This application provides a communication method and apparatus. The method includes: implicitly indicating a quantity of time units for transmitting a data channel and a quantity of times of retransmission of the data channel by using a size of a resource for transmitting a control channel.

Abstract: This application provides an information processing method and a communications device. An information processing method includes: a first communications device receives first information from a second communications device. The first communications device determines, based on the first information, that a start location of a first time window is a K1th time unit after a start location of a first resource or the start location of the first time window is a K2th time unit after an end location of the first resource. The first resource is a resource used by the first communications device to transmit data, and K1 and K2 are positive integers. The first communications device monitors, based on the determined start location of the first time window, control information sent by the second communications device.

Abstract: A method including: When downlink control information includes a first field, the first field includes (N+2) bits. A quantity L of TBs is determined based on the first field. When L is greater than 1, the L TBs can include both a newly transmitted TB and a retransmitted TB. In j consecutive bits in the first field, a bit state of only one bit is 1, bit states of j?1 bits are all 0, and j=N+1?L. k=0, a bit state of a bj bit in the first field is 1, and L consecutive bits in the first field, carry NDI of the L TBs; or k=L+1, a bit state of a bL bit in the first field is 1, and L consecutive bits in the first field, carry NDI information of the L TBs.

Abstract: This application provides a communication method, an access network device, and a terminal. The communication method includes: monitoring, by a terminal after completing initial transmission of first uplink data in a first-type transmission mode, a first downlink control channel sent by an access network device, where the first downlink control channel carries first downlink control information, the first-type transmission mode includes performing grant-free uplink data transmission based on radio resource control configuration signaling or based on radio resource control reconfiguration signaling and not based on layer 1 signaling, and the first downlink control information includes HARQ feedback information for the first uplink data, retransmission scheduling information for the first uplink data, or scheduling information for second uplink data; and detecting, by the terminal, the first downlink control information on the first downlink control channel.

Abstract: Embodiments of this application provide a resource indication method and a communication device. The resource indication method includes: A first communication device receives first information sent by a second communication device, where the first information is used to indicate a first resource pattern and indicate a reserved resource determined by using the first resource pattern, the first resource pattern is used to determine a position corresponding to each of N resource sets, and N is a positive integer greater than or equal to 1. The first communication device determines reserved resource based on the positions corresponding to the N resource sets and indicated by the first resource pattern, where the reserved resource is a resource unavailable to the first communication device. The first communication device determines not to transmit a signal by using the reserved resource.