Abstract:
This application relates to the field of communications technologies, and discloses a transport block generation method and apparatus. The method includes: determining a TBS based on an MCS of a receiving device, a resource characteristic of an RB allocated to the receiving device, and a quantity of symbols, where the quantity of symbols is a quantity of symbols included in each RB, and each RB includes a same quantity of symbols; and generating a TB based on a TBS. TBS is determined based on the MCS of the receiving device, a quantity of RBs allocated to the receiving device, and the quantity of symbols included in the RB, and the TB is generated based on the determined TBS. The quantity of symbols included in the RB is considered in determining the TBS. Therefore, the determined TBS may vary with the quantity of symbols included in the RB.
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 invention provide a multi-user interference suppression method, terminal and base station. The method includes performing layer mapping on and precoding service data of each of paired users to obtain precoded output data, mapping the precoded output data and a common pilot sequence to a port of an antenna array for sending to each user by using the antenna array. Correspondingly, the embodiments of the present invention further provide a data receiving method, base station and terminal. By using a common pilot sequence based on the paired users, the same pilot sequence is used for each user in the paired users of a cell or a collaborative area, which is different from the technical solution in the prior art where a user-specific pilot is used and pilots of different users are orthogonal.
Abstract:
Embodiments of the present invention provide a multi-user interference suppression method, terminal and base station. The method includes performing layer mapping on and precoding service data of each of paired users to obtain precoded output data, mapping the precoded output data and a common pilot sequence to a port of an antenna array for sending to each user by using the antenna array. Correspondingly, the embodiments of the present invention further provide a data receiving method, base station and terminal. By using a common pilot sequence based on the paired users, the same pilot sequence is used for each user in the paired users of a cell or a collaborative area, which is different from the technical solution in the prior art where a user-specific pilot is used and pilots of different users are orthogonal.
Abstract:
This disclosure provides communications methods and apparatuses. In an implementation, a terminal device performs operations comprising: receiving first configuration information from a network device, wherein the first configuration information indicates a configured quantity of physical downlink control channel (PDCCH) candidate locations in a time unit corresponding to a first control resource set (CORESET) group of a plurality of CORESET groups in a target cell, and determining, based on the configured quantity and a first quantity, a quantity of PDCCH candidate locations for PDCCH detection in the time unit corresponding to the first CORESET group, wherein the first quantity is a preset quantity of PDCCH candidate locations in a time unit corresponding to a CORESET group in the target cell.
Abstract:
This application provides a communication method and apparatus, applicable to the fields such as NR and LTE, to accurately estimate a G channel or an r/R channel, so as to ensure that other subsequent channels can still be accurately estimated. The method includes: A first device receives a first reference signal and performs channel estimation based on the first reference signal. The first reference signal is a reference signal determined by a second device by performing spectrum shifting on a second reference signal, and a frequency of the first reference signal is different from a frequency of the second reference signal.
Abstract:
Embodiments of this application relate to the field of communications technologies, and disclose a precoding matrix configuration method and apparatus, to help improve performance of decoding data. The method may include: receiving first configuration information, where the first configuration information is used to configure M precoding matrices, M≥2, and M is an integer; and aggregately sending a signal in N time domain units based on the first configuration information, where the signal is a signal obtained after precoding is performed by using a precoding matrix corresponding to each of the N time domain units, the precoding matrix corresponding to each time domain unit is one of the M precoding matrices, N≥2, and N is an integer.
Abstract:
This application provides a CSI measurement method and apparatus. In the method, a terminal may send, to a network device, a first RS that occupies a plurality of frequency domain resource segments in one time domain unit, where the plurality of frequency domain resource segments are discontinuously distributed on a frequency band of the terminal, and the network device receives the first RS on a corresponding frequency domain resource segment, and measures CSI based on the first RS. Currently, to avoid channel aging, a method is to shorten an SRS periodicity. Because frequency domain resources occupied by the SRS are continuously distributed on an entire frequency band, this method leads to a waste of time-frequency resources. However, the first RS in this application is discontinuously distributed on a frequency band of the terminal, and a relatively small quantity of time-frequency resources are occupied.
Abstract:
Embodiments of this application provide a downlink control information transmission method in which after receiving one piece of downlink control information (DCI), the terminal device learns whether blind detection of DCI needs to be continued. The method includes: A terminal device receives first DCI, where the first DCI includes first indication information, and the first indication information is used to indicate a first antenna port. The terminal device determines, based on the first antenna port and antenna port configuration information, whether second DCI exists. The configuration information may include an index of a CDM group to which each of a plurality of antenna ports belongs and a maximum quantity of CDM groups that is supported by the terminal device. Alternatively the configuration information may include one or more antenna port groups, and each of the one or more antenna port groups includes one or more antenna ports.
Abstract:
A beam reporting method and a communications apparatus is provided. The method includes that a terminal device receives first information, where the first information is used to configure at least two reference signal resource groups; and sending, by the terminal device, reporting information, where the reporting information includes related information of at least two beams, the at least two beams are used to send reference signals carried on at least two reference signal resources, and the reference signals sent by using the at least two beams can be simultaneously received by the terminal device, where the at least two reference signal resources are respectively from the at least two reference signal resource groups. In this application, related information of beams of at least two transmission points is reported through one time of beam scanning, to implement beam training in a CoMP system.