Abstract: A method for transmitting hybrid automatic repeat request (HARQ) acknowledgement information and a device to provide a manner of performing HARQ feedback in a Licensed Assisted Access-Long Term Evolution (LAA-LTE) system. The method for transmitting HARQ acknowledgement information includes sending, by a network device, first information to user equipment, where the first information indicates a subframe to be used by the user equipment to send the HARQ acknowledgement information to the network device on an unlicensed carrier, and receiving, by the network device in the subframe indicated by the first information, the HARQ acknowledgement information from the user equipment.

Abstract: An uplink transmission method based on a licensed-assisted access (LAA) system, and an apparatus, where the method includes reserving, for a transmission burst transmitted on an unlicensed carrier, at least one single-carrier frequency-division multiple access (SC-FDMA) symbol in a subframe of an uplink transmission burst corresponding to the transmission burst, where in the reserved at least one SC-FDMA symbol, user equipment (UE) accesses a channel using a listen-before-talk (LBT) access mechanism. Hence, a time gap for accessing the channel through LBT can be reserved for another UE in the uplink transmission burst. This improves a probability of successfully accessing the channel by another UE such that a plurality of UEs in an LAA communications system can perform uplink multiplexing.

Abstract: Embodiments of the present invention provide a data transmission method, a network device, and a terminal device. The method includes: generating, by a network device, indication information, where the indication information is used to instruct a terminal device to directly transmit uplink data on a channel resource without performing listen before talk (LBT), the channel resource is an unlicensed spectrum resource preempted by the network device through listen before talk LBT, and a first time interval between a moment at which transmission of downlink data on the channel resource ends and a moment at which the terminal device is scheduled to start the transmission of the uplink data is less than or equal to a preset time interval; and sending, by the network device, the indication information to the terminal device.

Abstract: Embodiments of the present disclosure provide examples of D2D resource allocation methods, devices, and systems. One example method includes receiving, by first UE, a first message sent by second UE, where the first message is used to request to allocate a resource to the second UE, the first UE is UE in a network coverage area of a base station, and the second UE is UE out of the network coverage area of the base station. Resource indication information of a first resource allocated to the second UE is obtained by the first UE according to the first message. A second message is sent by the first UE to the second UE, where the second message carries the resource indication information, and the second UE sends data to the first UE by using the first resource according to the resource indication information.

Abstract: A radio communications method, a base station, and a terminal, where the base station sends downlink control information to the terminal, where the downlink control information includes uplink scheduling indication information, and the uplink scheduling indication information instructing the terminal to send uplink data in a plurality of uplink sub frames on at least one unlicensed carrier, such that the terminal sends uplink data in a plurality of uplink subframes on one or more corresponding unlicensed carriers based on the uplink scheduling indication information, thereby implementing scheduling, using uplink scheduling indication information in one piece of downlink control information, of a plurality of uplink subframes to perform uplink transmission. This increases a data volume in data transmission while effectively reducing scheduling signaling overheads.

Abstract: A radio resource management (RRM) measurement method and apparatus, where the method includes receiving, by the terminal device, indication information from the network device, where the indication information indicates a time-frequency resource used to perform received signal strength indicator (RSSI) measurement on the unlicensed carrier, performing, by the terminal device on the time-frequency resource, the RSSI measurement on the unlicensed carrier to obtain an RSSI measurement result, and sending, by the terminal device, the RSSI measurement result to the network device.

Abstract: A method for communicating with an access node includes receiving measurement table information from the access node, wherein the measurement table information is derived from measurements of communications channels between access nodes and user equipments (UEs) served by the access nodes, determining an access strategy and an associated access parameter for a shared communications channel in accordance with the measurement table information, and transmitting an uplink transmission on the shared communications channel in accordance with the associated access parameter after obtaining access to the shared communications channel.

Abstract: Embodiments provide a method and an apparatus for transmitting a channel state information-reference signal (CSI-RS). The method includes: determining, by a base station based on one physical resource block (PRB) pair, a first configuration mode used for a CSI-RS, where a resource element (RE) occupied in the first configuration mode is obtained by aggregating all or a part of resource elements REs occupied in at least two second configuration modes used for the CSI-RS. The first configuration mode is a configuration mode for more than eight CSI-RS ports, and includes a correspondence between each CSI-RS port and a resource element RE. The second configuration mode is a configuration mode for eight CSI-RS ports, and comprises a correspondence between each CSI-RS port and a resource element RE. The method also includes transmitting, by the base station, the CSI-RS to user equipment using the first configuration mode.

Abstract: Methods and devices for transmitting a physical uplink shared channel (PUSCH) in a licensed-assisted access using Long Term Evolution (LAA-LTE) system are provided. One example method performed by a terminal includes: determining that a first unlicensed carrier is unavailable in a subframe n+k, and sending the PUSCH to a base station in the subframe n+k by using an alternate carrier or in one of a subframe n+k+1 to a subframe n+k+m by using the first unlicensed carrier. In such a way, a delay in sending uplink data by the terminal is reduced.

Abstract: A device-to-device (D2D) data transmission method and system, where the method implemented by a source terminal and includes sending a first message to n candidate terminals, where the first message discovers the n candidate terminals, the source terminal is out of a network coverage area of a base station, and the n candidate terminals are in the network coverage area of the base station, receiving n second messages from each candidate terminal, wherein each second message includes at least one of a user identity of each candidate terminal or status information of each candidate terminal, determining a relay terminal from the n candidate terminals according to at least one of the user identity of each candidate terminal or the status information of each candidate terminal, and transmitting the data to the base station using the relay terminal.

Abstract: A data retransmission method includes transmitting, by a first device, data to a second device by using a first carrier. The first carrier is an unlicensed carrier. The method additionally includes retransmitting, by the first device, the data to the second device by using a second carrier. The first carrier and the second carrier are different carriers. The method additionally includes sending, by the first device, control signaling to the second device. The control signaling is used to indicate the data.

Abstract: A method for transmitting channel state information and a transmission device includes sending, by a first device, carrier indication information to a second device, where the carrier indication information is used to indicate a carrier resource used when the second device sends channel state information of an unlicensed carrier; and receiving, by the first device, the channel state information sent by the second device. The first device indicates the carrier resource used for transmitting the channel state information, so that the second device can send the channel state information of the unlicensed carrier to the first device in time, and the first device can make a corresponding scheduling decision in time according to the channel state information of the unlicensed carrier.

Abstract: A method for transmitting a channel state information reference signal (CSI-RS), includes obtaining, by a first device, an unlicensed carrier. The method also includes determining, by the first device, a target CSI-RS from M pre-configured groups of CSI-RSs, where each group of CSI-RSs in the M groups of CSI-RSs are periodically sent in a time domain, different groups of CSI-RSs in the M groups of CSI-RSs have different sending periods and/or offsets, and M is an integer greater than 1. Additionally, the method includes sending, by the first device, the target CSI-RS to a second device based on the unlicensed carrier at a start sending moment of the target CSI-RS.

Abstract: The present invention discloses an information transmission method, a device, and a system, and relates to the communications field, so as to resolve a problem that a receiving device has excessively large power consumption because the receiving device needs to continuously perform blind detection on a channel to determine a moment at which data transmission is started. A specific solution is: obtaining, by a network device, a start location of a first subframe, configuring a first field in downlink control information DCI of a second subframe, and sending, to user equipment, the first subframe and the second subframe that are adjacent to each other, where the first field is used to indicate the start location of the first subframe. The present invention is used for information transmission.

Abstract: Embodiments provide a location information obtaining method and a device, and relates to the communications field. The method includes: obtaining, by a network device, location information of a reference point and location information of first user equipment; determining, by the network device, relative location information of the first user equipment relative to the reference point; and sending, by the network device, the location information of the reference point and the relative location information of the first user equipment relative to the reference point.

Abstract: A method includes: configuring, by a base station, a reference signal on a first subframe of each data frame; and configuring, by the base station, measurement resources on target subframes of each data frame, where the target subframes are all subframes of each data frame or all subframes except the first subframe of each data frame.

Abstract: Embodiments of the present disclosure provide a signal transmission method and a user equipment. The method includes: receiving, by a user equipment, an indication signal, where the indication signal is used to indicate resource numbers corresponding to physical resources occupied by one or more control signals, where a resource number corresponding to a physical resource includes time information and frequency information of the physical resource; allocating, by the user equipment according to the resource numbers, one or more physical resources corresponding to the one or more control signals; and sending, by the user equipment, the one or more control signals. With the embodiments of the present disclosure, energy consumption at a receive end can be saved.

Abstract: Embodiments of the disclosure provide a power control method, a base station, and user equipment. The method includes: determining, by the base station, a transmit power control parameter, where the power control parameter is used to determine maximum transmit power of the user equipment; sending, by the base station, the transmit power control parameter to the user equipment; and instructing, by the base station, the user equipment to use the maximum transmit power of the user equipment to send a device-to-device (D2D) signal, so that the user equipment can quickly acquire the maximum transmit power when performing D2D communication in a mobile telecommunication system (such as an LTE system).

Abstract: Embodiments of the present disclosure provide a signal transmission method and a user equipment. The method includes: receiving, by a user equipment, an indication signal, where the indication signal is used to indicate resource numbers corresponding to physical resources occupied by one or more control signals, where a resource number corresponding to a physical resource includes time information and frequency information of the physical resource; allocating, by the user equipment according to the resource numbers, one or more physical resources corresponding to the one or more control signals; and sending, by the user equipment, the one or more control signals. With the embodiments of the present disclosure, energy consumption at a receive end can be saved.