Communication apparatus, control method for communication apparatus, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorMitsumasa Abe
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Abstract
A communication apparatus including a first clock and a second clock which operate according to a predetermined time synchronization protocol synchronizes time of the first clock with the time of a time source device, and measures a staying time, in the communication apparatus, of a packet to be transferred to a second communication apparatus or the time source device, with consideration of the time of the second clock.
Claims9
A communication apparatus including a first clock and a second clock which operate according to a predetermined time synchronization protocol, the communication apparatus comprising:
- a time synchronization unit configured to synchronize time of the first clock with time of a time source device;
- and
- a measurement unit configured to measure a staying time, in the communication apparatus, of a packet to be transferred to a second communication apparatus or the time source device, based on time of the second clock,
- wherein the time synchronization unit synchronizes the time of the second clock with the time of the first clock during a period in which the staying time is not being measured by the measurement unit after synchronizing the time of the first clock with the time of the time source device.
A control method for a communication apparatus including a first clock and a second clock which operate according to a predetermined time synchronization protocol, the control method comprising:
- synchronizing time of the first clock with time of a time source device;
- and
- measuring a staying time, in the communication apparatus, of a packet to be transferred to a second communication apparatus or the time source device, based on time of the second clock,
- wherein the synchronizing synchronizes the time of the second clock with the time of the first clock during a period in which the staying time is not being measured by the measuring after synchronizing the time of the first clock with the time of the time source device.
A non-transitory computer-readable storage medium storing computer-executable instructions that, when executed by a computer, cause the computer to perform a control method for a communication apparatus including a first clock and a second clock which operate according to a predetermined time synchronization protocol, the control method comprising:
- synchronizing time of the first clock with time of a time source device;
- and
- measuring a staying time, in the communication apparatus, of a packet to be transferred to a second communication apparatus or the time source device, based on time of the second clock,
- wherein the synchronizing synchronizes the time of the second clock with the time of the first clock during a period in which the staying time is not being measured by the measuring after synchronizing the time of the first clock with the time of the time source device.
Dependencies are inferred from the claim text.