摘要:
The present invention provides a method, base station, and user equipment for transmitting a control channel. Grouping is performed, according to an aggregation level of the to-be-transmitted control channel, on sub-blocks in physical resource blocks configured by the base station for the to-be-transmitted control channel, then interleaving is performed, and then candidate control channels are mapped to the interleaved sub-blocks, so that any candidate control channel of the to-be-transmitted control channel is sent on consecutive time-frequency resources as possible, and meanwhile different candidate control channels are on different PRB pairs as possible. In this way, the base station may have better flexibility during actual sending of the ePDCCH, thereby not only achieving a precoding gain and facilitating better transmission of control information, but also achieving a larger scheduling gain.
摘要:
The present invention provides a random access method, a base station, and a user equipment. The method includes: obtaining, by the UE, a PRACH sequence; and sending, by the UE, the PRACH sequence to the base station to perform random access, and carrying first information when sending the PRACH sequence so that the base station receives the first information in a random access process. In the technical solutions of the present invention, the UE sends the first information in the random access process, which improves transmission efficiency of the first information. The present invention is particularly applicable to services of small packets.
摘要:
Embodiments of the present invention provide a method for mapping control channel resources, a base station, and a user equipment, which relate to the field of communications and are capable of dynamically setting the number of E-CCEs multiplexed in one resource set so as to ensure stable performance of E-CCEs, thereby improving the accuracy of receiving an E-PDCCH by a user. The method for mapping control channel resources includes: determining, by a base station, the number of E-CCEs multiplexed in one resource set, where the E-CCEs are borne over REs for transmission in the resource set, and the E-CCEs constitute an E-PDCCH; sending the E-PDCCH to a user equipment according to the determined number of E-CCEs multiplexed in one resource set; and receiving, by the user equipment, the E-PDCCH, and obtaining the number of E-CCEs multiplexed in one resource set. The embodiments of the present invention apply to a resource mapping.
摘要:
Embodiments of the present invention provide an uplink power control method, a user equipment and a base station. The method comprises: receiving configuration information of a channel state information reference signal CSI-RS from the base station, wherein the configuration information of the CSI-RS comprises reference signal port information and reference signal power information; and measuring a path loss for uplink power control based on the configuration information of the CSI-RS. The embodiments of the present invention use the CSI-RS to measure the path loss, which differs from a common CRS in that the CSI-RS may aim at a specific base station. Therefore, path loss measurement may be performed in respect of a target base station of uplink transmission, enabling the path loss compensation to match the actual path loss, thus improving the performance of uplink power control.
摘要:
Embodiments of the present invention provide a channel measurement and feedback method, a network device, and a system, and relate to the field of communications technologies. The method includes: receiving, by a first network device, pilot port configuration information sent by a second network device, where the pilot port configuration information is used to describe at least two pilot ports; measuring, by using the at least two pilot ports, a pilot signal sent by the second network device, and determining first information, where the first information includes at least one of second information of the first network device or third information of a third network device when it is assumed that the first network device and the third network device communicate with the second network device by performing spatial multiplexing on a same time frequency resource, the second information includes at least one of information about a pilot port used by the first network device, an RI used by the first network device, a PMI used by the first network device, or a CQI, and the third information includes at least one of information about a pilot port used by the third network device, an RI used by the third network device, a PMI used by the third network device, or a CQI; and feeding back the first information to the second network device. The present invention improves accuracy of channel measurement.
摘要:
An information transmission method and apparatus are provided. In the method, a terminal device generates a first codeword, where the first codeword is obtained based on a second codeword, a quantity of elements included in the second codeword is greater than a quantity of elements included in the first codeword, the second codeword is associated with a first coefficient set of a downlink channel, and the first coefficient set includes an element included in at least one row vector or column vector of a first coefficient matrix; and then the terminal device feeds back the first codeword to a network device. The terminal device can indicate a position and a numerical value of an element in the first coefficient set by reporting only the first codeword. This manner is simple. In addition, a codeword length of the first codeword is shorter than a codeword length of the second codeword. Therefore, a quantity of bits required for reporting the first codeword by the terminal device is definitely less than a quantity of bits occupied for reporting at least one space-frequency combination coefficient, reducing overheads.
摘要:
Embodiments of the present invention provide a channel measurement method, user equipment, and a codebook indication method, to reduce calculation complexity of the user equipment or a terminal by specifying a precoding numbering sequence. Embodiments of the present invention further provide user equipment. The technical solutions provided in embodiments of the present invention can optimize indication of a codebook, to reduce resources and improve channel performance.
摘要:
This application provides a reference signal transmission method and an apparatus, used in a multipoint coordination transmission scenario. In the reference signal transmission method, a frequency domain resource that carries a target reference signal in a frequency domain resource or a time domain resource that is associated with each QCL assumption may be separately determined, and then the target reference signal carried on the frequency domain resource that is associated with the QCL assumption is separately received by using the corresponding QCL assumption. Therefore, each QCL assumption can be used to perform channel parameter estimation, and further, a channel parameter estimation result is used to assist a DMRS in performing channel estimation, thereby improving accuracy of channel estimation.
摘要:
This application provides a method for sending channel state information and a related device. The method includes: receiving L reference signals, where L is a positive integer greater than or equal to 1; and sending channel state information, where the channel state information includes resource indexes of M reference signals in the L reference signals, K pieces of antenna panel state information, and M sets of channel quality information, where the K pieces of antenna panel state information indicate states of antenna panels; the K pieces of antenna panel state information are related to M sets of channel quality information; and the M sets of channel quality information are in a one-to-one correspondence with the resource indexes of the M reference signals. Based on the foregoing technical solutions, a terminal device notifies a network device of a quantity and a length of sent channel quality information. In this way, implementation complexity of obtaining the channel quality information by the network device can be reduced, and load of the network device can be reduced.
摘要:
This application relates to a communications method and apparatus, and a device. The communications method includes: A terminal device determines a first codeword set, where the first codeword set includes a first codeword, the first codeword is a 4 x 1 matrix, and each element in the matrix is a non-zero element. In embodiments of this application, the first codeword set may include a fully-coherent codeword. The terminal device sends uplink data to a network device by using the fully-coherent codeword, so that power for sending the uplink data can reach rated maximum transmit power, to improve sending quality of the uplink data, and also improve transmit power utilization of the terminal device.