A time synchronization method and device
A technology of time synchronization and time, which is applied in the direction of synchronization devices, connection management, wireless network protocols, etc., and can solve problems such as inaccurate time synchronization
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Embodiment 1
[0311] figure 2 It is a schematic flowchart corresponding to a time synchronization method provided in Embodiment 1 of the present application. Such as figure 2 shown, including:
[0312] In step 201, the access network device determines time information.
[0313] Here, the time information may include time of the first time type, such as XX hour XX minute XX millisecond XX microsecond, or XX hour XX minute XX millisecond XX microsecond XX nanosecond, wherein the first time type may correspond to UTC.
[0314] Further, the time information may also include the time difference between the first time type and other time types (GPS time or local time), for example, the time difference between UTC and GPS time, or the time difference between UTC and local time.
[0315] In this embodiment of the application, the time unit used for the time information can be any time unit whose precision is higher than or equal to milliseconds (ms), such as microseconds (us), nanoseconds (ns)...
example 2
[0346] Specifically, if the access network device receives the request message sent by the terminal device, since the request message includes at least one of the above items, example 1, the request message only includes the demand information of the time information and the time type requested by the terminal device , the access network device may determine the time type of the time information according to the time type requested by the terminal device, and determine the granularity of the time information according to the first indication information, or may determine the granularity of the time information according to a pre-agreed granularity. Example 2, the request message only includes the requirement information of the time information, then the access network device may determine the time type of the time information according to the pre-agreed time type, and determine the granularity of the time information according to the first indication information, or, The granul...
Embodiment 2
[0384] image 3 A schematic flowchart corresponding to a time synchronization method provided in Embodiment 2 of the present application, as shown in image 3 shown, including:
[0385] Step 301a, the access network device sends a first request message to the core network device, for requesting the core network device to send the first indication information;
[0386] Step 301b, the core network device receives the first request message, and sends the first indication information to the access network device,
[0387] Here, the first indication information includes granularity requirement information of the time information and / or QoS information of services supported by the terminal device.
[0388] Step 302, the access network device receives the first indication information sent by the core network device, and determines time information according to the first indication information.
[0389] Here, the granularity of the time information determined by the access network ...
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