Abstract:
The present disclosure relates to precoding matrix determining methods, devices, and systems. In one example method, a receive end device obtains channel state information (CSI) of a first channel and information about P antenna port groups of a transmit end device. The receive end device determines V orbital angular momentum (OAM) mode groups based on the CSI of the first channel and first OAM modes, determines a first precoding matrix based on the P antenna port groups of the transmit end device and the V OAM mode groups, and sends, to the transmit end device, first indication information indicating the first precoding matrix. The transmit end device receives the first indication information, and determines the first precoding matrix based on the first indication information.
Abstract:
This application provides a quantum communication method, an apparatus, and a system. The method includes: modulating a first symbol to an ith direction vector of a first electric wave based on a preset mapping relationship, to obtain a second electric wave; and transmitting the second electric wave, where the first electric wave supports M direction vectors, the ith direction vector of the first electric wave is one of the M direction vectors of the first electric wave, the first symbol is a symbol corresponding to first data, the ith direction vector of the first electric wave corresponds to an ith distribution result, the ith distribution result is obtained by converting the second electric wave into an energy quantum. In this application, the first symbol may be modulated to a direction vector of the first electric wave, and this application is compatible with the conventional technology.
Abstract:
The present disclosure describes example communication methods, terminals, access network devices, and core network devices. One example communication method includes sending, by an access network device, a slice resource adjustment message to a terminal, where the slice resource adjustment message includes target resource information, and wherein the slice resource adjustment message is used to instruct the terminal to adjust a resource of a slice currently accessed by the terminal to the target resource. The access network device receives a slice resource adjustment complete message sent by the terminal, where the slice resource adjustment complete message is used to indicate that the terminal has adjusted the resource of the slice currently accessed by the terminal to the target resource.
Abstract:
This application provides a communication method and apparatus applying a Huygens equivalent surface, to increase energy of a wanted signal and a degree of freedom of a spatial channel, and improve communication performance. The method includes: A receive end receives a first receiving signal based on a first Huygens equivalent surface. The receive end may further send first indication information. The first indication information includes indication information of at least one Huygens equivalent surface, the indication information of the at least one Huygens equivalent surface is determined based on a second Huygens equivalent surface, and the second Huygens equivalent surface corresponds to the first receiving signal.
Abstract:
This application relates to communication methods and apparatuses. In an example method, a first communication apparatus generates first indication information, and sends the first indication information to a second communication apparatus. The first indication information indicates M orbital angular momentum (OAM) modes jointly supported by the first communication apparatus and the second communication apparatus, where there is a correspondence between N OAM modes in the M OAM modes and a demodulation reference signal (DMRS) port.
Abstract:
Embodiments of the present disclosure provide methods and devices for inserting and extracting a pilot sequence according to a pilot mapping indicating a location for inserting the pilot sequence in a plurality of time-frequency resources. One example method includes inserting, by a transmitter according to pilot mappings corresponding to Nt transmit antenna ports by using Nt orthogonal pilot sequences that are different from each other, a pilot sequence corresponding to each of the transmit antenna ports into OFDM symbols that are included in the pilot mapping corresponding to the transmit antenna port. There is a one-to-one correspondence between the Nt pilot sequences and the Nt transmit antenna ports of the transmitter, where Nt is a positive integer greater than or equal to 2. The pilot mappings corresponding to the transmit antenna ports are the same among the Nt transmit antenna ports.
Abstract:
A method includes sending a first orbital angular momentum (OAM) reference signal in a first beam direction. The first OAM reference signal is used to determine a second beam direction from the first beam direction. The method also includes receiving first indication information. The first indication information includes information about the second beam direction. The method also includes sending a second OAM reference signal in the second beam direction. The second OAM reference signal is used to determine antenna information and a second channel response of the second OAM reference signal. The method also includes receiving second indication information. The second indication information is determined based on the second channel response and the antenna information. The second indication information is used to determine a transmission manner. The transmission manner includes OAM wave transmission, plane wave transmission, or joint transmission of OAM and a plane wave.
Abstract:
A radio resource identification method and an apparatus. The method includes: obtaining OAM mode domain information, where the OAM mode domain information includes a first OAM mode domain identifier, the first OAM mode domain identifier corresponds to a first transmission parameter of a vortex electromagnetic wave in a first OAM physical mode, or the first OAM mode domain identifier corresponds to a first ratio between the first transmission parameter and a reference value, and the reference value includes a transmission parameter of a plane electromagnetic wave or a transmission parameter of a vortex electromagnetic wave in a specified OAM physical mode in a plurality of OAM physical modes; and any plurality of waveform symbols pass through a same vortex electromagnetic wave channel; and determining a radio resource used for uplink transmission or downlink transmission.
Abstract:
Embodiments of the present invention provide a data transmission method, a sender device, and a receiver device. The method includes: sending, by a sender device, to-be-transmitted data to a receiver device according to a transmission policy; and receiving, by the sender device, feedback information sent by the receiver device. In this process, for to-be-transmitted data after a guard interval in a last radio frame of any scheduling window, the sender device sends the to-be-transmitted data according to the transmission policy, so that no timeout occurs when the sender device is waiting for the feedback information, thereby achieving an objective of improving data transmission efficiency.
Abstract:
Provided are a data packet transmission system and method, the system includes: an Agent device, a first connecting device, a MAC array, a second connecting device, a PHY array, a third connecting device and an RF array, where the Agent device sends data of a first data frame to the first connecting device, and the first connecting device sends a data packet to a destination MAC device in the MAC array; the destination MAC device sends a second data frame to the second connecting device; the second connecting device sends the data packet to a destination PHY device in the PHY array; the destination PHY device sends a third data frame to the third connecting device; and the third connecting device sends the data packet to a destination RF device in the RF array, and the destination RF device sends the data packet to a user side.