Abstract:
Embodiments of the present disclosure disclose a channel quality indicator (CQI) feedback method, user equipment, and a network device. The method includes: receiving, by the user equipment, a secondary pilot receive signal of each single sector and that is obtained after a secondary pilot transmit signal of each single sector transmitted by a network device is transmitted by using a radio channel; estimating, by the user equipment, a channel matrix according to the secondary pilot receive signal of each single sector and the pre-known secondary pilot transmit signal of each single sector; estimating, by the user equipment, a CQI of each single sector according to the channel matrix and a first precoding matrix, and estimating a CQI of each joint sector according to the channel matrix and a second precoding matrix; and feeding back, by the user equipment, each CQI to the network device.
Abstract:
A channel sending method and apparatus, and a channel receiving method and apparatus relate to the communications field, where the sending method includes separately setting a repetition quantity and a sending start time of a control channel, and a repetition quantity and a sending start time of a data channel, where the repetition quantity of the control channel is less than the repetition quantity of the data channel or the sending start time of the control channel is earlier than the sending start time of the data channel, sending the control channel according to the repetition quantity and the sending start time of the control channel, and sending the data channel according to the repetition quantity and the sending start time of the data channel. Hence, the sending method can save transmit power and resolve a problem of a lag of data channel demodulation.
Abstract:
A method for transmitting an absolute grant (AG) value and a user equipment, where the method includes receiving, by a user equipment, a conventional enhanced-absolute grant channel (E-AGCH) and a newly-added grant value detecting E-AGCH that are sent by a network side device, detecting, by the user equipment, AG information carried on at least one channel of the conventional E-AGCH and the newly-added grant value detecting E-AGCH, and controlling data transmission of the user equipment according to a detection result. Hence, continuity of the data transmission of the user equipment may be ensured, and transmission efficiency is improved.
Abstract:
The present disclosure relates to communication methods and communications apparatus. One example method includes receiving, by a terminal, configuration information sent by a network device, where the configuration information is used to indicate a resource in a plurality of candidate resources of a common search space, and the candidate resources of the common search space are determined based on one or more of a cell identity, downlink bandwidth, a frequency domain resource location of a synchronization channel, and a frequency domain resource location of a broadcast channel, and receiving, by the terminal, common control information on the resource indicated by the configuration information.
Abstract:
The present invention relates to the field of wireless communications technologies, and provides a method for transmitting a carrier, a base station, user equipment, and a system. The method discloses: sending, by a base station, a second carrier, where the second carrier at least partially shares a same resource area with a first carrier, the resource area includes a plurality of resource elements, and the first carrier and the second carrier occupy different resource elements; and sending, by the base station, blank resource element indication information to user equipment that receives the second carrier, where the blank resource element indication information is used to indicate a position of a resource element occupied by the first carrier in the shared resource area. According to the solutions provided in the embodiments, a resource utilization rate of a communications system is improved, and interference between carriers is avoided.
Abstract:
Embodiments of the present invention disclose a wireless data transmission method, including: obtaining a repetition quantity required for data transmission of each user equipment (UE) in a management range, and determining a round trip time (RTT) of the UE according to obtained repetition quantity information of the UE, process quantity information of the UE, and a transmission time interval (TTI). A repetition quantity required by a UE may be learned of by using repetition quantity information of the UE. Therefore, for a coverage capability of each UE, each RTT can include as few processes as possible, provided that a requirement of the UE for a repetition quantity is met. In this way, a probability of successful data decoding may be efficiently improved, thereby efficiently improving a coverage capability of UE in wireless communication.
Abstract:
Embodiments of the present invention disclose an uplink MIMO transmission method, including: sending, by a UE, first data to a base station (NodeB) in a first process in an HARQ_RTT, and receiving an acknowledgement character related to the first data and returned by the NodeB; and determining, by the UE according to the acknowledgement character and a rank value to be used for next transmission, data transmission of the first process in a next HARQ_RTT. The present invention further provides a corresponding user equipment and base station. Implementing the method and apparatus provided by the present invention can enable a UE to correctly perform HARQ transmission using MIMO, thereby effectively ensuring performance of MIMO.
Abstract:
The present invention relates to the field of wireless communications technologies, and provides a method for transmitting a carrier, a base station, user equipment, and a system. The method discloses: sending, by a base station, a second carrier, where the second carrier at least partially shares a same resource area with a first carrier, the resource area includes a plurality of resource elements, and the first carrier and the second carrier occupy different resource elements; and sending, by the base station, blank resource element indication information to user equipment that receives the second carrier, where the blank resource element indication information is used to indicate a position of a resource element occupied by the first carrier in the shared resource area. According to the solutions provided in the embodiments, a resource utilization rate of a communications system is improved, and interference between carriers is avoided.
Abstract:
This application provides an access control apparatus and method, and an access apparatus and method. The access control apparatus includes: a receiving unit, configured to receive a first preamble sequence; a determining unit, configured to determine an acquired-terminal group; and a sending unit, configured to send a first acquisition indicator; where the receiving unit is further configured to receive a second preamble sequence, the determining unit is further configured to determine an acquired terminal, and the sending unit is further configured to send a second acquisition indicator, where the second acquisition indicator is used to indicate access of the acquired terminal. In the present invention, a process of contending for an access resource by a terminal transforms from one-phase contention to two-phase contention, so that a quantity of preamble sequences received by the base station each time can be greatly reduced, thereby effectively reducing load of the base station.
Abstract:
Embodiments of the present invention provide a method and an apparatus for controlling transmit power of user equipment. The method includes: when total uplink transmit power of user equipment UE exceeds maximum allowed transmit power, calculating a first gain factor according to the maximum allowed transmit power; performing quantization processing on the first gain factor according to a gain factor of a first physical channel, to obtain a second gain factor, where the first physical channel includes a DPCCH2; reducing a gain factor of a second physical channel to the second gain factor, to reduce transmit power of the second physical channel, so that the total uplink transmit power of the UE does not exceed the maximum allowed transmit power, where the second physical channel includes an HS-DPCCH. This reduces a calculation error and improves control accuracy of transmit power.