Abstract:
Embodiments of the present invention disclose a pilot signal transmitting method, and a channel estimation method, an apparatus, and a system. The method includes: within a transmission time interval (TTI), transmitting a first pilot signal (CPICH1) on a first antenna, and transmitting a second pilot signal (CPICH2) on a second antenna; when no first-type terminal is scheduled within coverage of a MIMO system within the TTI, transmitting a third pilot signal (CPICH3) on a third antenna, and transmitting a fourth pilot signal (CPICH4) on a fourth antenna; and when a first-type terminal is scheduled within the coverage of the MIMO system within the TTI, transmitting the CPICH3 and a fifth pilot signal (CPICH5) on the third antenna, and transmitting the CPICH4 and a sixth pilot signal (CPICH6) on the fourth antenna. By using the method, interference of a pilot signal to a legacy terminal can be greatly reduced.
Abstract:
The present disclosure is applicable to the field of communications, and provides a method for positioning a channel boundary and a base station, where the method includes: receiving cell timing difference information of a channel of a reference cell, and obtaining a boundary of a high speed-dedicated physical control channel (HS-DPCCH) through calculation according to the cell timing difference information; and obtaining a CQI sending time point of the HS-DPCCH and a reception time point of a high speed-shared control channel (HS-SCCH) through calculation according to the boundary of the HS-DPCCH.
Abstract:
Embodiments of the present invention provide a communication method, a device, and a base station applied in a WCDMA system. The method includes sending downlink data with same timing via downlink carriers that are respectively configured in a first communication area, a second communication area, and a third communication area. The first communication area, the second communication area, and the third communication area are communication areas with every two thereof being adjacent to each other. The downlink carriers covered at edges of any two of the first communication area, the second communication area, and the third communication area have different frequencies. The communication areas serve as communication cells or communication sectors.
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 disclose a user equipment, a network side device, and a method for sending a DPCCH, which relate to the field of communications, so as to implement that the network side device knows a moment at which a DPCCH is sent and a DPCCH is periodically sent. Solutions provided in the embodiments of the present invention include: receiving indication information sent by the network side device by using the user equipment; activating a second carrier of DC-HSUPA according to the indication information; acquiring uplink DTX parameters; and periodically sending an uplink DPCCH on the second carrier of the DC-HSUPA according to the indication information and the uplink DTX parameters. The present invention is used to send a DPCCH.
Abstract:
Embodiments of the present invention disclose a channel timing method and apparatus for multiflow transmission, where the method includes: configuring time reference information of a non-time reference cell in a case of multiflow transmission; and sending the time reference information to the non-time reference cell, so that the non-time reference cell obtains a high speed dedicated physical control channel (HS-DPCCH) timing by using the time reference information. According to the foregoing solution, time reference information of a non-time reference cell is configured at a higher layer, and is sent to a user equipment, so that the user equipment obtains a high speed dedicated physical control channel (HS-DPCCH) timing by using the time reference information, so that the UE can obtain correct timing relationships between the HS-DPCCH in the non-time reference cell and an uplink DPCH, and between the HS-DPCCH and an HS-PDSCH.
Abstract:
A method for managing uplink carrier frequencies is provided, which is applicable to the field of communication. The method includes the following steps: A state switching response message sent by a UE is received, where the state switching response message includes a result of state switching performed by on a secondary uplink carrier serving cell; The result of the state switching is notified to a secondary uplink carrier non-serving cell in a secondary carrier active set through an RNC. A device and a system for managing uplink carrier frequencies are further provided. Through the method, device, and system provided in embodiments of the present invention, the uplink carrier frequencies are managed, so as to facilitate transmission of uplink data during multi-cell collaboration.
Abstract:
Embodiments of the present invention provide a channel quality indicator feedback method and apparatus, and a user equipment, so as to improve accuracy of channel quality reflection. The method includes: acquiring a first channel quality indicator CQI1 based on detection of a pilot that is sent by a base station; acquiring a second channel quality indicator CQI2 based on a result of detection of a demodulation pilot; and sending the first channel quality indicator CQI1 and/or the second channel quality indicator CQI2 to the base station in a manner in which the base station can distinguish the first channel quality indicator CQI1 and/or the second channel quality indicator CQI2. The method provided by the embodiments of the present invention objectively reflects a current channel quality status, so that the base station can acquire accurate channel quality information, thereby objectively scheduling data based on the channel quality information and improving data sending efficiency of a channel.
Abstract:
The present invention discloses a method and an apparatus for acquiring downlink quality information, which relate to the communications field and are used to resolve a problem in the prior art that a base station cannot learn interference caused by a UE to a neighboring cell. The method provided in the present invention includes: measuring the downlink quality information; and reporting the downlink quality information to a network-side device. The present invention is applicable to the communications field, and is used for acquiring the downlink quality information by the base station.
Abstract:
Embodiments of the present invention provide a method for controlling cell activation, a base station, and a terminal. According to the method for controlling cell activation, the base station, and the terminal that are provided in the embodiments of the present invention, through determination on cell identification information in the RRC signaling reconfiguration message, a corresponding cell remembers a previous activated state, or activation processing is performed, thereby implementing in an MF-Tx scenario, optimized configuration of an activated or deactivated state of the cell that participates in the multi-flow transmission when reconfiguration is implemented through RRC signaling.