Abstract:
Embodiments of this application disclose a modulation method. A first communication apparatus generates a first symbol stream based on a symbol type quantity, a probability distribution corresponding to a first symbol of each symbol type, a bit quantity corresponding to each first symbol, and a first original bit stream, the bit quantity corresponding to each first symbol is a bit quantity required by each first symbol that is represented by using a bit, and first symbols of different symbol types correspond to different probability distributions and/or different signal amplitudes; and the first communication apparatus generates a first quadrature amplitude modulation (QAM) symbol stream based on the first symbol stream and a second original bit stream.
Abstract:
This application discloses a directional measurement method and a device. In this solution, a terminal device may determine a to-be-measured receive beam, and perform RSSI measurement on the to-be-measured receive beam. According to the method, the terminal device may perform RSSI measurement on the to-be-measured receive beam in a targeted manner, and does not need to perform RSSI measurement in all directions. Therefore, in the method, directional RSSI measurement of the terminal device can be implemented, time and power that are consumed by the terminal device to perform RSSI measurement can be reduced, and RSSI measurement efficiency of the terminal device can be improved.
Abstract:
Embodiments of this application provide a communication method and a device, so that a terminal device in a communications system implements sidelink communication in an unlicensed frequency band. In an example implementation, a network device in the communications system may send configuration information, to indicate a channel access mode used when the terminal device performs sidelink communication in the unlicensed frequency band. After receiving the configuration information, the terminal device that accesses the network device may perform sidelink communication in the unlicensed frequency band based on the channel access mode indicated by the configuration information. According to this solution, the terminal device in the communications system may implement sidelink communication in the unlicensed frequency band.
Abstract:
Embodiments of this application disclose a resource allocation method, a base station, and a terminal. The method includes: A base station sends a configuration message to a terminal, where the configuration message is used to configure, for the terminal, a random access channel RACH resource used in a channel occupancy time COT. The base station receives a random access request that is sent by the terminal based on the RACH resource allocated by using the configuration message. According to embodiments of this application, a random access latency of the terminal can be reduced.
Abstract:
A method for indicating a transmission opportunity (TXOP) duration in a wireless communication system includes generating, by a TXOP holder, a physical layer protocol data unit (PPDU). The PPDU includes a High Efficiency Signal field A (HE-SIGA), and the HE-SIGA includes a TXOP duration field. The TXOP duration field is used to indicate to other stations a remaining time for using a channel by a station. The TXOP duration field includes a first part which indicates a granularity used, and a second part which indicates the TXOP duration using the granularity indicated by the first part. The TXOP holder sends the generated PPDU.
Abstract:
A multi-carrier aggregation method and apparatus, user equipment, and a network side device are disclosed. The method includes: determining, by a network side device according to information about a transmission resource that is obtained when at least one component carrier is successfully obtained through contention, start and end times of a scheduling phase corresponding to the at least one component carrier, where the scheduling phase is divided by an uplink-downlink switch point into an uplink phase of the scheduling phase and a downlink phase of the scheduling phase, the uplink-downlink switch point is used to divide a time to obtain an uplink time of the component carrier and a downlink time of the component carrier, and uplink-downlink switch points of two or more component carriers are aligned in time; and performing, by the network side device, downlink transmission with user equipment in the downlink phase of the scheduling phase.
Abstract:
A method, an eNodeB and a User Equipment for transmitting Random Access Response messages are provided. The method includes: receiving Random Access Preamble transmitted by the UE through the Random Access Channel; according to the RAP, determining whether the UE belongs to the central group or the edge group of the Random Access Area; after determining that the UE belongs to the central group of the RAA, determining the RAA which the UE belongs to; transmitting the first RAR message to the UE according to the RAP, the channel resource information of the RACH, and the RAA. By transmitting the RAR message on the basis of the RAP and the RAA, the method, eNB and UE for transmitting RAR messages enable different RAR messages to be transmitted with respect to identical Random Access requests of different RAAs.
Abstract:
A compensation method, a base station, and a user equipment for uplink power control in a CoMP system are provided. The method includes: a base station determines an adjustment value for an uplink sending power of a UE; the base station sends to the UE indication information and the adjustment value for the uplink sending power of the UE, where the indication information is used for indicating a range of the adjustment value for the uplink sending power of the UE, so that the UE, according to the indication information and the adjustment value for the uplink sending power of the UE, determines the uplink sending power of the UE. Embodiments of the present invention are capable of improving the quality of sending uplink data.
Abstract:
Embodiments of the present invention disclose a transmit diversity method, a related device, and a system, which mainly includes: configuring two different antenna ports separately for different antennas in a network, so that the antennas can use transmit diversity based on the configured antenna ports. In one aspect, because two antenna ports are used in the network to perform transmit diversity, a diversity gain of multiple antennas is obtained. In another aspect, a cavity position caused by a completely identical precoding codebook used in the network is avoided, and therefore network communication performance is improved. The technical solutions according to the embodiments of the present invention efficiently use the transmit diversity of the multiple antennas to acquire diversity gain so as to improve network communication performance.
Abstract:
Embodiments of the present invention provide a method, device, and system for sending channel state information. The method for sending channel state information includes: setting number of bits used for quantizing a relative received power value; sending the number of bits to a user equipment UE; receiving a received power codebook index value; determining a received power codebook element corresponding to the received power codebook index value; and processing a signal according to the corresponding received power codebook element.