Abstract: A channel information transmission apparatus and method, and a system are disclosed to improve channel information feedback precision. A first device includes: a receiving module, configured to receive a reference signal from a second device; a processing module, configured to obtain a precoding matrix based on the reference signal, and generate first channel information and second channel information that are used to indicate the precoding matrix; and a sending module, configured to send the first channel information and the second channel information to the second device.

Abstract: The present disclosure relates to synchronization beam sending and receiving methods, network devices, terminals, and systems. One example synchronization beam sending method includes sending, by a network device, at least one first subframe to a terminal, where the at least one first subframe includes at least one first beam identifier and at least one second beam identifier, a first beam corresponding to the first beam identifier is a beam in a first beam set, a second beam corresponding to the second beam identifier is a beam in a second beam set, an intersection set of the first beam set and the second beam set is empty, and the first beam identifier and the second beam identifier are different.

Abstract: Embodiments of the present invention disclose methods and apparatuses for receiving and sending a control channel, and are applicable to the field of communications technologies. In the embodiments of the present invention, a base station carries scheduling information of a user equipment of an R11 system in both the PDCCH region and the E-PDCCH region of a downlink subframe. In this way, the user equipment needs to detect the control channel within the PDCCH region and the E-PDCCH region, so that resources of the two regions are available to the user equipment of the R11 system. Moreover, the user equipment detects only the control channel of the first type in the PDCCH region, and detects control channels of the other type in the E-PDCCH region. The method in the embodiments of the present invention does not increase the number of control channel detections.

Abstract: A wireless access method and apparatus, the method including sending N first signal sets on N first resources, where N is an integer greater than 1, receiving Z response signals from a terminal for the N first signal sets, where each response signal of the response signals comprises indication information of a resource on which the respective first signal set of the N first signal sets is located, Z is an integer greater than or equal to 1, and Z is less than or equal to N, and sending M second signal sets on M second resources according to the Z response signals, where M is an integer greater than or equal to 1, and each second signal set of the M second signal sets corresponds to at least one of the N first signal sets.

Abstract: Embodiments of the present disclosure relate to the communications field, and provide a reference signal transmitting/receiving method and system, and an apparatus. The method includes: determining, by a transmitting device, a first resource map of a reference signal supporting Z antenna ports, and transmitting the reference signal after the reference signal supporting Z antenna ports is mapped to a target time-frequency resource based on the first resource map, where the first resource map is repeated in time domain and/or frequency domain in a repetition unit of K resource units, each of the K resource units corresponds to a second resource map of a reference signal supporting P antenna ports, and the P antenna ports corresponding to the second resource map for every two adjacent resource units include G same antenna ports and H different antenna ports.

Abstract: In a system and method of control channel transmission in the communications field, REs, except those used for transmitting a DMRS, are grouped in each physical resource block pair of L physical resource block pairs. The L physical resource block pairs are determined to be used to transmit a control channel into N eREGs. The number of valid REs are calculated except other overheads in each eREG of the N eREGs. Each of the eCCEs are mapped onto M eREGs according to the number of valid REs included in each eREG of the N eREGs of each physical resource block pair. The eCCE is sent in the REs included in the eREG.

Abstract: A signal transmission method, system and device are described. When measuring a reference signal and determining channel quality, a user equipment (UE) obtains a difference between codeword-to-CSI-RS mapping relationships by using a channel quality measurement model. The UE, using a measurement, calculates an optimized mapping relationship. The UE determines at least one mapping relationship from the mapping relationships, to adjust a codeword-to-CSI-RS mapping relationship of a channel.

Abstract: A link recovery method, a terminal device, and a network device are provided. In an embodiment, a method includes: receiving, by a terminal device from a network device, a first signaling and a second signaling, wherein the first signaling indicates one or more reference signals for detecting channel quality information, the second signaling indicates quasi co-location (QCL) information of a physical downlink control channel (PDCCH) and QCL information of the one or more reference signals.

Abstract: This application discloses a signal transmission method, related devices, and a system. The method includes: sending, by a terminal, link reconfiguration request information to a network device at a moment n, where the link reconfiguration request information is used to initiate link reconfiguration; and detecting, by the terminal based on first information, a PDCCH during a first time period after the moment n, where the first information includes QCL information of a first reference signal and a second reference signal, the first reference signal is used to demodulate the PDCCH, and the second reference signal is a reference signal meeting a first threshold.

Abstract: This application provides a channel state information feedback method and an apparatus. The method includes: generating first frequency domain indication information and M1 pieces of first precoding indication information, where the first frequency domain indication information is used to indicate L1 frequency domain subbands in T frequency domain subbands, the T frequency domain subbands are a system bandwidth or a part of the system bandwidth, 1?L1<T, the T frequency domain subbands are in a one-to-one correspondence with T precoding matrices, and a precoding matrix wk corresponding to a kth frequency domain subband satisfies: Wk=W1×W2k, where w1 represents a matrix with Nt rows and R columns, and W2k represents a matrix with R rows and S columns; and w1 represents a matrix with Nt rows and R columns, and W2k represents a matrix with R rows and S columns.

Abstract: According to various aspects of the present disclosure, methods, systems, and media for object tracking are provided. In some embodiments, the systems may include: at least one hardware processor to: detect a target object in first image data provided by a first camera; determine a first plurality of neighboring cameras of the first camera that have detected the target object; determine at least one of the first plurality of neighboring cameras as a next node of the first camera; and generate first topological data for the first camera and the next node of the first camera.

Abstract: The present disclosure describes a message transmission method. In one example method, a first signal is received by a first device from a second device using a radio channel. A second signal, corresponding to and different from the received first signal, is transmitted by the second device to the first device. Information carried by the second signal corresponds to one of M state values. A first sequence corresponding to one or more subcarriers occupied by the second signal is directly proportional to a product of a preset second sequence and a third sequence in a state sequence set. Channel information of the radio channel is estimated by the first device according to the received first signal and the preset second sequence. The information carried by the second signal is determined by the first device according to the estimated channel information of the radio channel and the received first signal.

Abstract: A channel information sending method, a data sending method, and a device are provided, to improve feedback precision of a precoding matrix. A first device includes: a receiving module, configured to receive a reference signal; a processing module, configured to measure the reference signal to obtain first channel information and second channel information; and a sending module, configured to send the first channel information and the second channel information. When generating the precoding matrix, the second device may perform weighted combination on M first vectors based on the weighted combination factor indicated by the received second channel information, instead of selecting only one eigenvector from a plurality of eigenvectors, so that the generated precoding matrix is more precise.

Abstract: A channel state information (CSI) feedback method is provided. A receive end receives CSI process configuration information. The CSI process configuration information includes at least one CSI process, and a first CSI process in the at least one CSI process is associated with K reference signal resources and M interference measurement resources. For the first CSI process, the receive end obtains a target reference signal resource based on the K reference signal resources, obtains a target interference measurement resource based on the M interference measurement resources, and obtains CSI based on the target reference signal resource and the target interference measurement resource. The receive end sends the CSI. The CSI includes a target index, and the target index is used to represent the target reference signal resource and/or the target interference measurement resource. In this way, CSI feedback flexibility is improved.

Abstract: Embodiments of the present invention provide methods for transmitting and receiving a control channel, a base station, and a user equipment, which relate to the communication field, and can solve a transmission problem of available changing transmission resources caused by introduction of an E-PDCCH. A method for configuring a control channel resource includes: determining, by a base station according to a system configuration and/or user configuration, resource elements REs included in an extended control channel element E-CCE, and transmitting an extended physical downlink control channel E-PDCCH to a user equipment, where the E-PDCCH is carried by the E-CCE; and receiving, by the user equipment, the E-PDCCH, and obtaining the REs included in the E-CCE, and receiving, over the REs included in the E-CCE, the E-PDCCH transmitted by the base station. The embodiments of the present invention are used for configuring and detecting a control channel resource.

Abstract: This application provides an information indication method. The method includes: determining, by a terminal device, that communication on a first downlink resource fails, where the first downlink resource is a resource configured by a network device for the terminal device; and sending, by the terminal device, first indication information to a network device on a first uplink resource, where the first indication information is used to indicate that the communication on the first downlink resource fails, the first uplink resource is a resource used to carry second indication information, and lengths of respective information bits of the second indication information and the first indication information are the same, but status bits of the information bits are different.

Abstract: This application discloses a method for indicating PDSCH receiving information, a data receiving method, and an apparatus. According to this application, a network device generates first indication information, where the first indication information is used to indicate physical downlink shared channel PDSCH receiving information, and the PDSCH receiving information includes information identical to physical downlink control channel PDCCH receiving information; and the network device transmits the first indication information over a PDCCH. This application can be used to improve efficiency of indicating PDSCH receiving information, thereby improving PDSCH receiving performance.

Abstract: This application provides a channel state information feedback method, user equipment, and a base station. A base station configures N first reference signal resources for UE, and sends the N first reference signal resources to the UE. The UE feeds back the CSI of the M first reference signal resources in a horizontal dimension and the M pieces of first reference signal resource indication information to the base station. This overcomes a disadvantage that only channel state information in a horizontal dimension is fed back in conventional channel estimation.

Abstract: Embodiments of the present invention provide a signal transmission apparatus, system, and method. A first network device detects, in a first resource group, a first signal sent by a second network device, and the first network device determines an mth resource in a second resource group according to an nth resource in the first resource group and a first correspondence.

Abstract: Embodiments of the present application provide a signal sending method, a device, and a system. A base station modulates, by using a first modulation scheme, signaling carried in a control channel, and modulates, by using a second modulation scheme, data carried in a traffic channel; and the base station sends, to UE, a signal obtained after modulation. In this way, the base station can independently select a modulation scheme for the control channel and the traffic channel, avoiding a case in which a modulation scheme used by the control channel and a modulation scheme used by the traffic channel must be the same, so that the base station can flexibly select a channel modulation scheme.