Uplink timing method and related apparatus

An uplink timing apparatus, comprising:

• a memory configured to store instructions;
• and
• one or more processors coupled to the memory and configured to execute the instructions to cause the uplink timing apparatus to:
• receive, from a network device, timing information and a synchronization signal;
• and
• send, to an access network device that does not support downlink transmission, an uplink signal at a first uplink sending moment,
• wherein the first uplink sending moment is based on the timing information and the synchronization signal,
• wherein the timing information comprises at least one of a first time point or an offset, wherein the first time point is a start time point, of a downlink time unit, that is based on the synchronization signal, or an uplink timing reference point, for sending the uplink signal, is based on at least one of the first time point or the offset,
• wherein the uplink timing reference point is based on the first time point and the offset,
• wherein the offset is a time offset of the uplink timing reference point relative to the first time point,
• wherein the offset is based on a difference between a first path distance and a second path distance,
• wherein the first path distance is between the uplink timing apparatus and the network device, and
• wherein the second path distance is between the uplink timing apparatus and the access network device.

A computer program product comprising instructions that are stored on a non-transitory computer-readable medium and that, when executed by one or more processors, cause an uplink timing apparatus to:

• receive, from a network device, timing information and a synchronization signal;
• and
• send, to an access network device that does not support downlink transmission, an uplink signal at a first uplink sending moment, wherein the first uplink sending moment is based on the timing information and the synchronization signal,
• wherein the timing information comprises at least one of a first time point or an offset, wherein the first time point is a start time point, of a downlink time unit, that is based on the synchronization signal, or an uplink timing reference point, for sending the uplink signal, is based on at least one of the first time point or the offset,
• wherein the uplink timing reference point is based on the first time point and the offset, wherein the offset is a time offset of the uplink timing reference point relative to the first time point,
• wherein the offset is based on a difference between a first path distance and a second path distance, wherein the first path distance is between the uplink timing apparatus and the network device, and wherein the second path distance is between the uplink timing apparatus and the access network device.