3GPP标准里的时间同步问题

我是玛丽

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.