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US 11,310,757 B2Granted
Time synchronization method and apparatus
AssigneeHuawei Technologies Co., Ltd.
InventorsFeng Yu, Haifeng Yu, Bo Lin, Guangwei Yu, Feng Gao
Life of this patent
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Abstract
A time synchronization method and an apparatus are disclosed. The method includes: receiving, by a terminal device, a first time sent by an access network device; obtaining a first transmission delay; obtaining a fourth time based on the first transmission delay and the first time; and synchronizing a time of the terminal device based on the fourth time.
Claims16
A method, comprising:
- receiving, by a terminal device, a first frame number and a first value from an access network device, wherein the first value is used to calculate a first time period;
- obtaining, by the terminal device, a reference time based on a sum of the first time period and a preset time;
- and
- synchronizing, by the terminal device, a time of the terminal device based on the reference time, wherein a first system frame indicates a time domain location corresponding to the reference time, the first system frame is closest to a second system frame, a frame number of the first system frame is equal to the first frame number, and the terminal device receives the first value in the second system frame.
1 more element
A method, comprising:
- determining, by an access network device, a first frame number and a first value, wherein the first value is used to calculate a first time period, the first time period is used to determine a reference time, and the reference time is used to synchronize a time of a terminal device;
- and
- sending, by the access network device, the first frame number and the first value to the terminal device, wherein a first system frame indicates a time domain location corresponding to the reference time, the first system frame is closest to a second system frame, a frame number of the first system frame is equal to the first frame number, and the terminal device receives the first value in the second system frame.
A device, 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 first frame number and a first value from an access network device, wherein the first value is used to calculate a first time period;
- obtain a reference time based on a sum of the first time period and a preset time;
- and
- synchronize a time of the device based on the reference time, wherein a first system frame indicates a time domain location corresponding to the reference time, the first system frame is closest to a second system frame, a frame number of the first system frame is equal to the first frame number, and the device receives the first value in the second system frame.
4 more elements
A device, comprising:
- a processor;
- and
- a non-transitory computer-readable storage medium coupled to the processor and storing programming instructions for execution by the processor, the programming instructions instruct the processor to:
- determine a first frame number and a first value, wherein the first value is used to calculate a first time period, the first time period is used to determine a reference time, and the reference time is used to synchronize a time of a terminal device;
- and
- send the first frame number and the first value to the terminal device, wherein a first system frame indicates a time domain location corresponding to the reference time, the first system frame is closest to a second system frame, a frame number of the first system frame is equal to the first frame number, and the terminal device receives the first value in the second system frame.
3 more elements
Dependencies are inferred from the claim text.