Research Organizations:
China Southern Power Grid, Huawei, State Grid Global Energy Interconnection
Research Institute, State Grid Jiangsu Electric Power Research Institute, NARI,
Beijing Sifang Automation, Jiangsu Fang Tian, Guangdong Telecommunications
Planning and Designing Institute, State Grid Zhejiang, China Mobile, China
Unicom, China Telecom
Research Direction: Focus on
the high-precision time synchronization technology defined in 3GPP Release 16
to determine whether the existing standard can fully meet the requirements of
high-precision clock synchronization and timing services of power terminals.
Research Results: Focus on
the high-precision time synchronization technology defined in 3GPP Release 16
to determine whether the existing standard can fully meet the requirements of
high-precision clock synchronization and timing services of power terminals.
1.
Current situation: The GPS module is directly deployed on terminal nodes such
as the electric power DTU to implement high-precision clock synchronization.
2.
Challenges:
(1)
The GPS module is easily affected by weather and geographical environment (the
main driving force for providing high-precision time based on the 5G network).
(2)
Multiple terminals, wide coverage, and high deployment costs.
3.
3GPP R15 standard: The 5G NR-based border clock synchronization solution is
based on the achievements of the joint innovation project of China Southern
Power Grid, China Mobile, and Huawei.
4.
3GPP R16 standard: The 5GS-based preferential timing solution for multiple
clock domains is used. This solution mainly applies to the scenario where a UE
supports multiple services and is located in different clock domains.
5.
For power grid terminals and applications, 3GPP R16 and R15 support the same
clock synchronization precision and provide the same user experience.
[Summary]:
The 5G NR-based border clock synchronization solution can meet the requirements
of power clock synchronization (accuracy: 1s). The 5GS-based multi-domain clock
solution does not need to be considered.
