Abstract:
Embodiments of the present disclosure describe a control signaling reception method and apparatus. The method includes: receiving to-be-received control signaling using a control channel, wherein the control signaling carried on the control channel indicates operation of at least two terminal devices; and demodulating the to-be-received control signaling; wherein the control channel occupies a part of subcarriers in a system bandwidth in a frequency domain. According to the embodiments of the present disclosure, common control signaling that can indicate operation of multiple terminal devices and user dedicated control signaling that can indicate an operation behavior of only one terminal device are carried on different physical channels for transmission. In this way, different resource mapping manners and different signal processing manners can be used according to different transmission requirements, so as to optimally balance resource overheads and transmission reliability of different types of control signaling, thereby improving transmission resource use efficiency.
Abstract:
A method for feeding back information about a channel between antenna arrays is provided, which includes: receiving, by a first network device, sub-channel channel information of N×M sub-channels that is sent by a second network device, where an antenna array of the first network device includes M panels, an antenna array of the second network device includes N panels, the channel between the first network device and the second network device includes the N×M sub-channels, M is a positive integer that is greater than or equal to 2, N is and N is a positive integer, M and N are not to be 1 at the same time, and the M panels and the N panels each includes at least two antennas; generating channel information of the channel between the first network device and the second network device according to the sub-channel channel information of the N×M sub-channels.
Abstract:
Embodiments of the present disclosure provide a method for obtaining channel state information, including: sending, by a base station, one or multiple pieces of downlink signaling to user equipment, where the one or multiple pieces of downlink signaling instruct the user equipment to feed back channel dimension information, where the channel dimension information includes an effective dimension of a channel subspace of a statistical channel between the base station and the user equipment, and the effective dimension of the channel subspace is less than a quantity of reference signal ports used to measure channel state information; and receiving, by the base station, the channel dimension information fed back by the user equipment.
Abstract:
This application discloses a transmission control method, apparatus, and system, and a storage medium, and belongs to the field of communications technologies. The method includes: generating target control format indicator information, where the target control format indicator information is used to indicate a target time-frequency resource occupied by a downlink control channel; and sending the target control format indicator information. According to this application, a problem that a time-frequency resource occupied by a downlink control channel cannot be adjusted can be resolved, and the time-frequency resource occupied by the downlink control channel can be flexibly adjusted. This application is used for transmission control.
Abstract:
This application provides a technical solution for rank indication, and especially when a CQI number is not configured or a CQI number is 1, a network device configures a rank indication restriction parameter as that at least one of ranks whose index numbers are 0, 1, 2, and 3 is allowed to be reported by the terminal device; or even if the network device does not perform the foregoing configuration, and none of the ranks whose index numbers are 0, 1, 2, and 3 is allowed to be reported, the terminal device may select at least one rank for RI reporting, so as to resolve a problem that a system cannot work. In addition, according to embodiments of this application, bit overheads required for RI reporting may further be reduced.
Abstract:
A method for feeding back information about a channel between antenna arrays is provided, which includes: receiving, by a first network device, channel information of N×M sub-channels that is sent by a second network device, where an antenna array of the first network device includes M subarrays, an antenna array of the second network device includes N subarrays, a channel between the antenna array of the first network device and the antenna array of the second network device includes the N×M sub-channels, M and N are positive integers and are not both 1, and the M subarrays and the N subarrays each include at least two antennas; and generating channel information of the channel between the antenna array of the first network device and the antenna array of the second network device according to the channel information of the N×M sub-channels that is from the second network device.
Abstract:
Embodiments disclose an antenna information sending method and device, and an antenna information receiving method and device. The method includes: obtaining first antenna information of a terminal device, where the first antenna information includes at least one or more of a maximum number of layers for uplink spatial multiplexing that are supported by the terminal device, an antenna number supported by the terminal device, or whether the terminal device supports smart switch on/off of UE's antenna ports. The method also includes sending the first antenna information to a base station. In this way, the terminal device can control, according to a service requirement of the terminal device, an antenna deployed on the terminal device, and report antenna information of the terminal device to the base station in a timely manner.
Abstract:
Embodiments of the present disclosure provide a method for obtaining channel state information, including: sending, by a base station, one or multiple pieces of downlink signaling to user equipment, where the one or multiple pieces of downlink signaling instruct the user equipment to feed back channel dimension information, where the channel dimension information includes an effective dimension of a channel subspace of a statistical channel between the base station and the user equipment, and the effective dimension of the channel subspace is less than a quantity of reference signal ports used to measure channel state information; and receiving, by the base station, the channel dimension information fed back by the user equipment.
Abstract:
Embodiments of the present invention provide a method, a device, and a system for transmitting data based on a hybrid automatic repeat request (HARQ). The method includes: adjusting, according to current physical resources, a channel quality indicator (CQI) fed back by a terminal to obtain an adjusted CQI and determining an initial transmit power corresponding to the adjusted CQI; calculating an optimum number NRV of redundant versions (RVs) according to a signal-to-noise ratio (SNR) gain, the adjusted CQI, and a requirement on quality of service of the terminal; adjusting the initial transmit power according to the optimum number of RVs and the adjusted CQI; and using NRV transmit time intervals (TTIs) and the adjusted transmit power to transmit NRV RVs of a transport block (TB) to the terminal. The embodiments of the present invention further provide a base station, a terminal, and a system for transmitting data.
Abstract:
This application provides a channel state information (CSI) measurement method and an apparatus. The method includes: A network device receives, from a terminal, a first reference signal (RS) used to measure uplink CSI and a second RS used to measure the uplink CSI. The first RS includes one or more RS ports, and the one or more RS ports correspond to one or more antenna ports of the terminal. Correspondingly, the second RS includes one or more RS ports, and the one or more RS ports also correspond to one or more antenna ports of the terminal. In addition, the one or more antenna ports, of the terminal, corresponding to the one or more RS ports included in the second RS are partially or completely the same as the one or more antenna ports, of the terminal, corresponding to the one or more RS ports included in the first RS.