Calibration method and apparatus

A control apparatus of a remote radio unit (RRU), comprising:

• a memory, configured to store a computer program;
• and
• at least one processor, configured to execute the computer program stored in the memory, to cause the control apparatus of the RRU to perform:
• receiving resource configuration information from a centralized control apparatus, wherein 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 determined by the centralized control apparatus, a quantity of hops of a calibration path between the RRU and each of the n other RRUs is 1, and a quantity of hops of a shortest calibration path between any two RRUs in the calibration path topology is less than or equal to a preset hop quantity threshold, wherein n is a natural number greater than or equal to 1;
• and
• controlling, based on the resource configuration information, the RRU to send and receive the calibration signal on the time-frequency resource;
• obtaining m groups of path information based on the calibration signal sent and received by the RRU, wherein m=1, or m=M, M is a quantity of channels of the RRU, and each of them groups of path information comprises path information of n calibration paths between one channel of the RRU and the n other RRUs;
• obtaining m calibration coefficients based on the m groups of path information;
• and
• compensating the M channels of the RRU by using the m calibration coefficients.

A centralized control apparatus, comprising:

• a memory, configured to store a computer program;
• and
• at least one processor, configured to execute the computer program stored in the memory, to cause the centralized control apparatus to perform:
• determining a calibration path topology based on signal quality between N remote radio units (RRUs), wherein in the calibration path topology, a quantity of hops of a calibration path between two RRUs between which signal quality is greater than or equal to a preset signal quality threshold is 1, and a quantity of hops of a shortest calibration path between any two RRUs is less than or equal to a preset hop quantity threshold;
• and
• allocating a time-frequency resource to each of the N RRUs based on the calibration path topology, and sending, to a control apparatus of each of the N RRUs, configuration information indicating the corresponding time-frequency resource, wherein the time-frequency resource corresponding to the RRU is used by the RRU to send and receive a calibration signal.