Joint channel correction method, related apparatus, and system

A joint channel correction apparatus, comprising:

• a transceiver, configured to:
• send a first joint channel correction instruction to a first remote radio unit (RRU) for triggering the first RRU to send a first correction reference signal through X1 transmit channels in X1 traffic channels of the first RRU,
• send a second joint channel correction instruction to a second RRU for triggering the second RRU to send a second correction reference signal through X2 transmit channels in X2 traffic channels of the second RRU, and
• receive a result sent by the second RRU about reception of the first correction reference signal through X2 receive channels in the X2 traffic channels, and receive a result sent by the first RRU about reception of the second correction reference signal through X1 receive channels in the X1 traffic channels;
• and
• a processor, configured to obtain correction compensation coefficients of the X1 traffic channels or the X2 traffic channels through calculation according to the first correction reference signal, the result about reception of the first correction reference signal through the X2 receive channels, the second correction reference signal, and the result about reception of the second correction reference signal through the X1 receive channels, wherein X1 and X2 are integers greater than 1.

A communications system, comprising:

• a remote management device, a first remote radio unit (RRU), and a second RRU, wherein:
• the remote management device is configured to:
• send a first joint channel correction instruction to the first RRU to trigger the first RRU to send a first correction reference signal through X1 transmit channels in X1 traffic channels of the first RRU;
• send a second joint channel correction instruction to the second RRU to trigger the second RRU to send a second correction reference signal through X2 transmit channels in X2 traffic channels of the second RRU;
• receive a result sent by the second RRU about reception of the first correction reference signal through X2 receive channels in the X2 traffic channels, and receive a result sent by the first RRU about reception of the second correction reference signal through X1 receive channels in the X1 traffic channels;
• and
• obtain correction compensation coefficients of the X1 traffic channels or the X2 traffic channels through calculation according to the first correction reference signal, the result about reception of the first correction reference signal through the X2 receive channels, the second correction reference signal, and the result about reception of the second correction reference signal through the X1 receive channels, wherein X1 and X2 are integers greater than 1.