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标题: 3GPP标准里的时间同步问题 [查看完整版帖子] [打印本页]

时间: 2020-8-6 10:21

作者: 我是玛丽 标题: 3GPP标准里的时间同步问题

1. 3GPP TR 22.804 V16.2.0 (2018-12) Study on Communication for Automationin Vertical Domains (Release 16)

在多个垂直行业的案例中，表达了时间同步的需求。

运动控制、大规模无线传感器、电力系统 PMU、低延迟音频流现场表演、高数据率视频流/专业视频制作。

2. 3GPP TR 22.821 V16.1.0 (2018-06) Feasibility Study onLAN Support in 5G (Release 16)

提到TSN。

3. 3GPP TS 22.104 V17.2.0 (2019-12) Service requirementsfor cyber-physical control applications in vertical domains;Stage 1(Release 17)

提到时间同步要求。

User-specific clock synchronicity accuracy level	Number of devices in one Communication group for clock synchronisation	Synchronicity budget requirement (note)	Service area	Scenario
1	Up to 300 UEs	[<x μs]	≤ 100 m x 100 m	- Motion control - Control-to-control communication for industrial controller
2	Up to 300 UEs	[<x μs]	≤ 1000 m x 100 m	- Control-to-control communication for industrial controller
3	Up to 10 UEs	< 10 μs	≤ 2500 m2	- High data rate video streaming
3a	Up to 100 UEs	<1 μs	≤10 km2	- AVProd synchronisation and packet timing
4	Up to 100 UEs	[<x μs]	< 20 km2	- Smart Grid: synchronicity between PMUs
5	Up to 10 UEs	< 50 μs	400 km	- Telesurgery and telediagnosis
NOTE: The clock synchronicity requirement refers to the clock synchronicity budget for the 5G system, as described in Clause 5.6.1. The global time domain requires in general a precision of 1 μs between the sync master and any device of the clock domain.

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