Huawei Technologies Co., Limited

Chaoyi Yan

Quanzhong Gao

Hui Huang

Jing Liu

Zezhou Luo

Feng Li

Chen Wang

Chao Zhang

Junjie Yan

Bo Wang

Yue Liu

Heng Xu

Jia Liu

Guochen Liu

Fan Luo

Siduo Shen

A switching method includes receiving, by a source network device, N pieces of data channel quality information. The N pieces of data channel quality information are in a one-to-one correspondence with N candidate network devices. Each of the N pieces of data channel quality information is used to indicate coverage quality of a data channel between a terminal device and a candidate network device corresponding to the data channel quality information. N is an integer greater than or equal to 1. The method also includes determining, by the source network device, based on the N pieces of data channel quality information, one of the N candidate network devices as a target network device to which the terminal device is to be switched from the source network device.

Switching method and communication apparatus

A carrier aggregation system includes a TDD carrier and an FDD carrier, and a method for the carrier aggregation system includes: a terminal device receives downlink information by using a secondary component carrier; and the terminal device sends feedback information for the downlink information by using a primary component carrier. When the primary component carrier or the secondary component carrier is a TDD carrier, at least one first subframe that includes P consecutive sTTIs exists in the TDD carrier, and at least one sTTI that occupies two OFDM symbols exists in the P consecutive sTTIs, where P is an integer greater than 1. Embodiments of the present disclosure further provide a corresponding terminal device and network device.

Communication method for carrier aggregation system, terminal, and network device

A communication apparatus acting as a baseband unit (BBU) or being applicable to a BBU, and having instructions for obtaining first coordination information to be sent to a second BBU, determining, based on preset link information, a transmission link corresponding to the second BBU, the transmission link including a first remote radio unit (RRU) and a second RRU, the first RRU belonging to the BBU, the second RRU belonging to the second BBU, and the first RRU and the second RRU being connected through a wired link, sending the first coordination information to the first RRU, sending indication information to the first RRU, the indication information indicating to the first RRU to send the first coordination information to the second RRU through the wired link, the indication information having an identifier of the second RRU.

Information transmission method and communication apparatus

This application provides a calibration method: receiving, by a control apparatus of an RRU, resource configuration information, where a time-frequency resource indicated by the resource configuration information is used to send and receive a calibration signal between the RRU and n other RRUs, the n other RRUs are RRUs in a calibration path topology, a quantity of hops of a calibration path between the RRU and each of the n other RRUs is 1; controlling, based on the resource configuration information, the RRU to send and receive a calibration signal on the time-frequency resource; obtaining m groups of path information based on the calibration signal; obtaining m calibration coefficients based on the m groups of path information; and compensating M channels of the RRU by using the m calibration coefficients.

Calibration method and apparatus

A method for calibrating a channel between radio remote unit (RRUs) includes: for each subcarrier in M subcarriers in full bandwidth, instructing, by a baseband unit (BBU), a reference RRU to transceive a calibration signal on the subcarrier by using a reference channel and a preset channel in a preset RRU, and calculating a calibration coefficient; and determining a first correspondence according to M calibration coefficients obtained by means of calculation, where the first correspondence includes a correspondence between a frequency of each subcarrier and the calibration coefficient on the subcarrier, 2&#x2264;M&#x3c;N, N is a total quantity of subcarriers in the full bandwidth, and both M and N are integers.

Method and apparatus for calibrating channel between radio remote units RRUs

A beamforming method and apparatus are disclosed, to expand coverage of a PDCCH in a particular direction, and improve demodulation performance of the PDCCH. Under this method, a cell-specific reference signal CRS wide beam can be combined by a base station with N CRS narrow beams to form N CRS composite beams. A first beam can be selected by the base station from the N CRS composite beams. Beamforming processing can be performed by the base station on a physical downlink control channel (PDCCH) based on a weight of the first beam to form a second beam. The first beam and the second beam can be sent.

Beamforming method and apparatus

A wireless communication method, a base station and a terminal are disclosed. In an embodiment a method includes determining, by a base station, a first resource and a second resource from a target resource, wherein the target resource is a resource shared by at least one terminal in a first Radio Access Technology (RAT) and at least one terminal in a second RAT, the first resource being a resource used by the terminal in the first RAT, and the second resource being a resource used by the terminal in the second RAT, sending, by the base station, first indication information to the terminal in the first RAT, wherein the first indication information is used to indicate the first resource to be used by the terminal in the first RAT and sending, by the base station, second indication information to the terminal in the second RAT, wherein the second indication information is used to indicate the second resource to be used by the terminal in the second RAT.

Wireless communication with shared resources for different radio access technologies, base station, and terminal

Embodiments of the present invention relate to a method and device for determining RRU. The method includes: a BBU obtains interference strength information of a terminal, where the interference strength information includes a downlink mode of the terminal. The method further includes: if demodulation is performed by using a dedicated reference signal (DRS) in the downlink mode, the BBU performs resource scheduling on the terminal by using a second RRU, where the second RRU is selected by the BBU from multiple first RRUs that serve the terminal; or if demodulation is performed without using a DRS in the downlink mode, the BBU performs resource scheduling on the terminal by using a third RRU, where the third RRU is determined by the BBU according to any one of an uplink signal strength value of the terminal, a downlink quality value of the terminal, or an uplink quality value of the terminal.

Method and device for determining remote radio unit

The method includes acquiring a working remote radio unit (RRU) set of a user equipment (UE), determining an RRU having the highest signal strength of the UE and screening the working RRU set based on the RRU having the highest signal strength, to generate a first paired RRU set of the UE, generating a paired UE set based on the first paired RRU set, determining whether an RRU exists in the first paired RRU set, when an RRU exists in the first paired RRU set, determining a second paired RRU set of the UE according to the first paired RRU set and the paired UE set and determining an actual user attribute of the UE according to the second paired RRU set and an initial user attribute of the UE, and scheduling a resource for the UE according to the actual user attribute of the UE.

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Shenzhen, China

Chaoyi Yan