Abstract: A method and an apparatus for scheduling a system information block are disclosed, to increase a probability of obtaining a system information block by a terminal. A network device sends a master information block to the terminal, where the master information block includes DMTC period information; and the terminal receives the master information block, and detects a system information block, at a location of a subframe in a DMTC period. Alternatively, the master information block includes DMTC period information and DMTC time window information, and the terminal detects a system information block, at a location of a subframe in a DMTC period and in a DMTC window size. Alternatively, the master information block includes system information block period information or MF system information block content change indication information, and the terminal determines, based on the system information block period information, whether content of the detected system information block is changed.

Abstract: A power control method and apparatus for an uplink control channel are provided. The method includes: determining, by user equipment, to send first uplink control information on a first PUCCH and in a subframe i; determining transmit power for sending the first uplink control information on the first PUCCH and in the subframe i. In the embodiments of the present invention, the transmit power is determined by using a sum of a base power adjustment value and any one of a first power adjustment value determined according to a quantity of bits of the first uplink control information. Therefore, a method for determining the transmit power is provided.

Abstract: A downlink information processing method, user equipment, a base station, and a communications system are disclosed. In one aspect, a method performed by a terminal device such as user equipment (UE) includes: determining that a cell-specific frequency shift of downlink information is equal to a cell-specific frequency shift of a cell-specific reference signal (CRS), determining a resource element location according to the cell-specific frequency shift of the downlink information, where a duration of a transmission time interval (TTI) to which the resource element location belongs is less than or equal to a time length of one timeslot, receiving the downlink information at the resource element location, and demodulating downlink data according to the downlink information.

Abstract: Embodiments provide a uplink channel transmission method. Scheduling information from the network device can be received by a terminal device. The scheduling information indicates uplink time-frequency resources carrying at least one uplink channel. a first uplink channel is carried on a first uplink time-frequency resource, and the first uplink time-frequency resource occupies M subbands in the N subbands in frequency domain, M?2. The M subbands can be detected by the terminal device to determine, from the first uplink time-frequency resource, a second uplink time-frequency resource usable by the terminal device. The second uplink time-frequency resource occupies K subbands in the M subbands in frequency domain, and M>K?1. The first uplink channel can be sent by the terminal device by using the second uplink time-frequency resource.

Abstract: Example control information transmission methods and apparatus are described. One example control information transmission method includes that a terminal device determines a transmission resource based on a receiving status of downlink data and a scheduling request transmission status. The transmission resource is one of N first resources or one of M second resources. The N first resources are corresponding to N receiving statuses of the downlink data, and the M second resources are used to transmit a scheduling request. N is a positive integer greater than 1, and M is a positive integer. The terminal device sends uplink control information on the transmission resource.

Abstract: A terminal device receives first scheduling information from an access network device, where the first scheduling information is used to schedule the terminal device to transmit a first transport block by using an unlicensed carrier; performs rate matching on the first transport block, to obtain uplink data; detects the unlicensed carrier, and determines a start time domain symbol, used to send the uplink data, in at least two time domain symbols included in a first subframe, where the at least two time domain symbols include a first time domain symbol and a second time domain symbol, the second time domain symbol is later than the first time domain symbol, and the start time domain symbol is the first time domain symbol or the second time domain symbol; and sends the uplink data to the access network device from the start time domain symbol.

Abstract: Embodiments of the present application disclose a random access method, a base station, and a terminal device. The terminal device receives random access configuration information from a base station, and determines a random access channel, a base frequency, and at least two frequency hopping intervals according to the random access configuration information. The terminal device sends, over the random access channel, random access signals to the base station using frequencies determined according to the base frequency and the N frequency hopping intervals. The terminal device may send the random access signals over the random access channel to the base station according to the base frequency the frequency hopping intervals and a frequency hopping pattern.

Abstract: A network device is configured to transmit acknowledgement packets according to the length of the egress queue. The network device receives data packets from one or more endpoints and buffers the data packets in an egress buffer before transmitting the data packets. The network device also receives acknowledgement packets that are sent in response to data packets previously transmitted by the network device. The network device buffers the acknowledgement packets in an acknowledgement buffer. The network device transmits the acknowledgement packets at an acknowledgment rate that is based on a queue length of the egress buffer.

Abstract: Embodiments of the present disclosure provide a data transmission method, a network device, and a terminal. The data transmission method includes: receiving, by a network device, a first reference signal and a first physical channel that are sent by a first terminal device, where the first reference signal is at the ith symbol in a slot, i is a positive integer less than 7, the first physical channel occupies n symbols in the slot, and n is 1, 2, or 3; and demodulating, by the network device, the first physical channel according to the first reference signal. According to the present disclosure, a data transmission latency can be reduced.

Abstract: A data transmission method, an apparatus, and a system are disclosed, to resolve a problem that a transmission mechanism based on a transmission time interval TTI of one subframe or a transmission mechanism based on a TTI of 1 ms cannot satisfy a service latency requirement of a user. In a base station provided in embodiments of the present invention, a processor is configured to: determine a data transmission resource, where the data transmission resource is a short-TTI data transmission resource, and the short-TTI data transmission resource is less than a length of one subframe or is less than 1 ms in time domain; and a transceiver is configured to: send DCI to a terminal device, where the DCI is used to indicate the data transmission resource; and perform data transmission with the terminal device on the data transmission resource.

Abstract: A resource allocation indication method, a device, and a system are provided. The method includes: obtaining, by a terminal device, first indication information; and determining, by the terminal device, a target resource based on the first indication information, and sending uplink data on the target resource, where the target resource includes a resource block in M basic resource units that is allocated to the terminal device; a position of an allocated resource block in each of the M basic resource units corresponds to a first frequency domain position of a resource block in a first resource block set; the first frequency domain position is a frequency domain position obtained after a second frequency domain position of a resource block in a second resource block set is shifted; and the M basic resource units are arranged in ascending order in frequency domain.

Abstract: Embodiments of the present invention disclose a method for detecting a signal on an unlicensed spectrum channel, user equipment, and a base station. The method includes: receiving, by user equipment, instruction information sent by a base station; and starting, by the user equipment according to the instruction information, to detect a signal on an unlicensed spectrum channel. According to the present invention, only when receiving the instruction information sent by the base station, the user equipment detects the signal on the unlicensed spectrum channel according to the instruction information. This reduces power consumption of the user equipment.

Abstract: This application provides an information transmission method. The method includes: determining, by a first network device, a communication type of the first network device in a second time period; and sending, by the first network device, a signal to a second network device in a first time period through an air interface when the communication type is downlink communication or an idle communication type, where the signal is used to indicate the communication type. The second network device may use the received information on the communication type of the first network device in the second time period to determine its communication type in the second time period to minimize interference between the two network devices. For example, if the communication type of the first network device is downlink in the second time period, the second network device may determine its communication type to be downlink in the second time period.

Abstract: Embodiments of the present disclosure provide a backoff window adjustment method, and an apparatus. In downlink transmission, a base station obtains a trigger condition for adjusting a length of a backoff window on a first channel, and adjusts the length of the backoff window of the base station on the first channel according to the obtained trigger condition for adjusting the length of the backoff window on the first channel. In uplink transmission, a user equipment (UE) obtains a trigger condition for adjusting a length of a backoff window on a first channel, and adjusts the length of the backoff window of the UE on the first channel according to the obtained trigger condition for adjusting the length of the backoff window on the first channel.

Abstract: Embodiments of the present invention provide a user equipment, a network device, and a method. The user equipment includes: a receiving unit, configured to receive a physical downlink control channel in an nth timeslot; and a processing unit, configured to determine a first PUCCH resource index of a first PUCCH in an (n+k)th timeslot according to a first resource index offset and a minimum index value, where the first resource index offset is used to indicate an offset of the resource index of the first PUCCH The processing unit is further configured to determine, according to the first PUCCH resource index, an index of a second physical resource block PRB on which a second PUCCH in the (n+k)th timeslot is located, and a second PUCCH resource on the second PRB.

Abstract: A power control method and apparatus for an uplink control channel are provided. The method includes: determining, by user equipment, to send first uplink control information on a first PUCCH and in a subframe i; determining transmit power for sending the first uplink control information on the first PUCCH and in the subframe i. In the embodiments of the present invention, the transmit power is determined by using a sum of a base power adjustment value and any one of a first power adjustment value determined according to a quantity of bits of the first uplink control information. Therefore, a method for determining the transmit power is provided.

Abstract: Embodiments of the present disclosure provide a feedback information transmission method in a communications system and an apparatus. In this method, UE may determine a codebook size of the feedback information according to a status of a downlink subframe scheduled by the base station.

Abstract: Embodiments of the present invention provide a data transmission method and a data transmission device. The data transmission device includes: a detection unit, configured to detect a first signal in a first cell; a determining unit, configured to determine a reference time point according to a first sequence of the detected first signal, where the reference time point is located in a first subframe of the first cell; where the determining unit is further configured to determine a position of a data channel according to the determined reference time point; and a receiving unit, configured to receive, according to the position of the data channel, control data and/or service data carried on the data channel. According to the embodiments of the present invention, resource utilization can be improved.

Abstract: Embodiments of this application disclose an uplink channel power allocation method, including: determining, by a terminal device, priorities of N uplink channels based on a service set corresponding to each of the N uplink channels in a first time period, where each service set is corresponding to one priority, and at least one of service sets corresponding to the N uplink channels includes at least one service; and allocating, by the terminal device, transmit power to at least one of the N uplink channels based on the priorities of the N uplink channels.

Abstract: The present disclosure relates to data transmission methods and apparatus. One example method includes sending, by a radio access network device, a first transport block to a terminal device, where the first transport block includes at least two code blocks, the at least two code blocks are divided into at least two different code block sets, and each code block set includes at least one of the at least two code blocks, and receiving, by the radio access network device, first feedback information sent by the terminal device, where the first feedback information includes at least two pieces of feedback information corresponding to the first transport block, and the at least two pieces of feedback information are respectively used to indicate receiving statuses of the at least two code block sets.