Clock synchronization method and apparatus

A clock synchronization apparatus, comprising:

• a processor, and
• a memory coupled to the processor and storing instructions that, when executed by the processor, cause the clock synchronization apparatus to be configured to:
• receive a plurality of data blocks using a plurality of physical layer modules (PHYs), wherein the plurality of data blocks comprises a plurality of head data blocks, wherein the plurality of head data blocks arrive first at a receiving apparatus in the plurality of data blocks, and wherein the plurality of head data blocks is in a one-to-one correspondence with the plurality of PHYs;
• perform timestamp sampling on the plurality of data blocks received by a communications unit to generate a plurality of receipt timestamps;
• align the plurality of receipt timestamps using a first receipt timestamp as a reference, wherein the first receipt timestamp is a first data block in the plurality of receipt timestamps, wherein the first data block is received using a first PHY, and wherein the first PHY corresponds to a head data block that is last to arrive at the receiving apparatus in the plurality of head data blocks;
• generate a clock synchronization packet based on the plurality of data blocks;
• and
• write a value of a second receipt timestamp into the clock synchronization packet, wherein the second receipt timestamp of a second data block and that is based on the plurality of receipt timestamps, wherein the second data block is for sending timestamp sampling in the plurality of data blocks, and wherein a sending timestamp of the second data block is of the clock synchronization packet.

A computer program product comprising computer-executable instructions for storage on a non-transitory computer-readable medium that, when executed by a processor, cause a clock synchronization apparatus to:

• receive a plurality of data blocks using a plurality of physical layer modules (PHYs), wherein the plurality of data blocks comprises a plurality of head data blocks, wherein the plurality of head data blocks arrives first at a receiving apparatus in the plurality of data blocks, and wherein the plurality of head data blocks is in a one-to-one correspondence with the plurality of PHYs;
• perform timestamp sampling on the plurality of data blocks to generate a plurality of receipt timestamps;
• align the plurality of receipt timestamps using a first receipt timestamp as a reference, wherein the first receipt timestamp is of a first data block in the plurality of receipt timestamps, wherein the first data block is received using a first PHY, and wherein the first PHY is of a head data block that is last to arrive at the receiving apparatus in the plurality of head data blocks;
• generate a clock synchronization packet based on the plurality of data blocks;
• and
• write a value of a second receipt timestamp into the clock synchronization packet, wherein the second receipt timestamp is of a second data block and that is based on the plurality of receipt timestamps, wherein the second data block is for sending timestamp sampling in the plurality of data blocks, and wherein a sending timestamp of the second data block is of the clock synchronization packet.