Method and apparatus for obtaining feedback delay

An apparatus, comprising:

• a processor;
• and
• a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to:
• obtain a target time elapsed in a process from when a remote radio end receives uplink data sent from a user end to when the remote radio end sends out feedback information responsive to the uplink data to the user end, wherein the feedback information responsive to the uplink data is fed back by the apparatus to the remote radio end, and the feedback information is information about whether the apparatus successfully receives the uplink data sent by the user end;
• calculate a feedback delay by adding the target time and an air interface transmission propagation delay together, wherein the air interface transmission propagation delay is a transmission time of the uplink data from the user end to the remote radio end;
• and
• configure an uplink hybrid automatic repeat request (HARQ) ACK/NACK feedback interval to be the feedback delay.

A method for obtaining a feedback delay, the method comprising:

• obtaining, by a processing node, a transmission time of downlink detection data which is sent from the processing node to a remote radio end on a subframe on which no downlink data is sent to the remote radio end;
• obtaining, by the processing node, after receiving uplink detection data sent on a downlink subframe by the remote radio end, a transmission time of the uplink detection data from the remote radio end to the processing node;
• instructing, by the processing node, the remote radio end to feed back a time required for processing the uplink detection data and the downlink detection data at the remote radio end;
• receiving, by the processing node, the time required for processing the uplink detection data and the downlink detection data at the remote radio end, from the remote radio end;
• calculating, by the processing node, a feedback delay according to the transmission time of the uplink detection data, the transmission time of the downlink detection data and the time required for processing the uplink detection data and the downlink detection data at the remote radio end;
• and
• configuring an uplink hybrid automatic repeat request (HARQ) ACK/NACK feedback interval to be the feedback delay.

An apparatus, comprising:

• a processor;
• and
• a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to:
• obtain a transmission time of downlink detection data which is sent from the apparatus to a remote radio end on a subframe on which no downlink data is sent to the remote radio end;
• obtain, after receiving uplink detection data sent on a downlink subframe by the remote radio end, a transmission time of the uplink detection data from the remote radio end to the apparatus;
• instruct the remote radio end to feed back a time required for processing the uplink detection data and the downlink detection data at the remote radio end;
• receive the time required for processing the uplink detection data and the downlink detection data at the remote radio end, from the remote radio end;
• calculate a feedback delay according to the transmission time of the uplink detection, the transmission time of the downlink detection data and the time required for processing the uplink detection data and the downlink detection data at the remote radio end;
• and
• configure an uplink hybrid automatic repeat request (HARQ) ACK/NACK feedback interval to be the feedback delay.