Sounding reference symbol transmission method and radio remote unit

A radio remote unit (RRU) comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium coupled to the processor and storing programming instructions for execution by the processor, wherein the programming instructions instruct the processor to:
• receive a plurality of pieces of sampled data in a first period by using each antenna of an antenna array;
• identify whether all of the plurality of pieces of sampled data are sounding reference symbol (SRS) sampled data;
• in case that all of the plurality of pieces of sampled data are the SRS sampled data, buffer the plurality of pieces of sampled data into a buffer;
• and
• read the plurality of pieces of sampled data from the buffer in a second period, and send the read plurality of pieces of sampled data to a baseband processing unit (BBU), wherein duration of the second period is longer than duration of the first period.

A base station comprising an antenna array, a baseband processing unit (BBU), and a radio remote unit (RRU), wherein the antenna array is connected to the RRU, and the RRU is connected to the BBU, and the RRU is configured to:

• read a plurality of pieces of sampled data from a buffer in a second period;
• and
• send the read plurality of pieces of sampled data to the BBU,
• wherein all of the plurality of pieces of sampled data are sounding reference symbol (SRS) sampled data and received by the RRU in a first period by using each antenna of the antenna array, duration of the second period is longer than duration of the first period.