I. Project Name

China StarNet Network Application Research Institute Co., Ltd. NTP Clock Synchronization System Construction Project

II. Duration of Cooperation

2026 year 4 month

III. Company Profile of China StarNet Network Application Research Institute Co., Ltd.

China StarNet Network Application Research Institute Co., Ltd. was established in 2021 year 9 Month, registered capital 150000 With capital of ten thousand yuan, the company is headquartered in Haidian District, Beijing. It is a subsidiary of China Satellite Network Group, a centrally administered state-owned enterprise, and a national-level high-tech enterprise. The company focuses on foundational software services, satellite communication services, and software development, holding numerous core patents in areas such as electronic device control and satellite communications. Its developed products—including a standardized object‑model management system and a user‑perceived performance evaluation and analysis platform—are widely deployed in the construction of low‑Earth‑orbit satellite internet networks. 6G Core scenarios such as integrated space–air–ground networks. As a leading R&D entity in the satellite‑internet sector, the company leverages its parent company’s resource advantages to secure favorable policy treatment in areas like spectrum allocation and orbital slot applications. 2024-2025 Over the years, it has successively been approved as a provincial key laboratory and has received the National Telecommunications Society Science and Technology Award, providing critical technological support for national information sovereignty and security.

IV. Purchased Products

The network time server developed by Beijing Zhongxinchuang Technology Co., Ltd. DNTS-9 It is an intelligent, high-precision device. NTP Network time server. DNTS-9 Network time servers obtain standard time information from navigation and positioning satellite systems such as the BeiDou system, and via… NTP/SNTP or other network protocols, providing standard time services across the network. Devices that require time synchronization—such as personal computers, servers, and controllers—can synchronize with international standard time.

Use simultaneously GNSS Priority can be defined for satellite receivers, and the system supports a single receiver. / Dual receivers, single antenna / Dual-antenna configuration; each receiver can be set to time‑synchronization mode either independently or in conjunction with others. When the receiver and all other available time sources lose signal, DNTS-9 It uses a built-in rubidium atomic clock for timekeeping and provides continuous time services to external users.

DNTS-9 In addition to serving as a primary network time‑synchronization device, it can also function as a secondary time server, enabling more effective time synchronization in large‑scale network environments. It can support distributed networks, computer security systems, file management systems, e‑commerce systems, and online… B2B The system, along with cloud databases, requires precise standard time signals for storage and maintenance, and has been successfully deployed across sectors including government, finance, mobile telecommunications, public security, petroleum, electric power, transportation, industry, and national defense.

DNTS-9 Network time servers are extremely easy to install and use: simply connect the satellite receiving antenna and plug the network port into a network switch, and you can achieve time synchronization across all devices on the network.

V. Customer Requirements

1. In satellite Internet R&D scenarios, high-precision time synchronization requires client‑side synchronization accuracy within the local area network. ≤2ms , support UTC Time tracing;
2. It is compatible with multi‑physical isolation network environments and requires unified time synchronization for distributed scientific research equipment.
3. It features high reliability and supports autonomous timekeeping in the absence of satellite signals, ensuring continuous timing services.
4. It meets domestic localization and adaptation requirements, with core components and software systems compliant with the security standards of research institutes.
5. Provides comprehensive remote management and monitoring capabilities, supporting multi-device access and alert notifications.
6. It meets the time synchronization requirements of multiple scenarios, including satellite launch measurement and control as well as communication network testing.

VI. Solution

In response to customers’ core needs, Zhongxin Chuang offers customized time synchronization solutions:

1. Core Equipment: Deployment DNTS-9 Type NTP Server, supports BeiDou, GPS 、 GLONASS 、 Galileo Multi-mode GNSS Time synchronization: a standalone BeiDou time‑synchronization mode is available, with timing accuracy ( 24 Hourly average) ≤5ns , meeting research-grade precision requirements;
2. Redundant Design: Equipped with Dual Receivers + Dual-antenna architecture, supports customizable time-source priority, and features a built-in high‑performance oven‑controlled crystal oscillator (with excellent holdover performance). ≤8.64 µs/24 hours), and automatically switches to timekeeping mode when no satellite signal is available;
3. Network adaptation: provided 4 Fully isolated Gigabit Ethernet interface, supports IPv4/IPv6 Dual-stack, compatible with multi‑physical‑isolation network environments, single network port. NTP Throughput ≥90,000 Next / seconds;
4. Security Assurance: Supported RSA Asymmetric encryption, AES Encryption and certificate-based authentication, with tiered access control configured, through GB/T17626 IV Level electromagnetic compatibility testing;
5. Management platform: Included DNTS Manager Centralized management software that enables remote monitoring, log aggregation, and alert notifications for thousands of servers and tens of thousands of clients (supports syslog 、 SNMP 、 email Multi-protocol alarm);
6. Domestic Adaptation: Offers a fully domestically sourced configuration for core components, ensures compatibility with domestic operating systems and research equipment, and provides a comprehensive test report.

VII. Implementation Outcomes

1. Time synchronization accuracy meets the standard: client and UTC Time synchronization deviation is controlled within 0.03-2ms (LAN typical value), meeting the high-precision timing requirements of satellite development, TT&C, and other scenarios;
2. Stable Operation Assurance: Equipment MTBF reach 90000 hour, achieve 7×24 Continuous timekeeping over hours, maintaining high‑precision timing even in the absence of satellite signals;
3. Multi‑scenario compatibility: Successfully adapted to a variety of application scenarios, including distributed scientific research networks and satellite communication test systems, supporting the simultaneous access of tens of thousands of terminal devices.
4. Enhanced Operations and Maintenance Efficiency: A centralized management platform enables real-time device monitoring, remote configuration, and fault alerts, reducing O&M response times. 50%；
5. Security and Compliance: End-to-end encryption and domestically developed configurations meet the information security requirements of research institutions and have passed relevant compliance assessments.

VIII. Application Cases

China Academy of Launch Vehicle Technology, Tianma Telescope of the Chinese Academy of Sciences, Shenzhou‑14 Manned Spacecraft, Shanghai Academy of Spaceflight Technology, China Electric Power Research Institute, Institute of Physics of the Chinese Academy of Engineering, Institute of Automation of the Chinese Academy of Sciences, Institute of Oceanology of the Chinese Academy of Sciences, Institute of High Energy Physics of the Chinese Academy of Sciences, China Institute of Atomic Energy, Nanjing Institute of Astronomical Optical Technology of the National Astronomical Observatories, China Academy of Information and Communications Technology, Lanzhou Branch of the Chinese Academy of Sciences, Institute of Modern Physics of the Chinese Academy of Sciences, China Railway Scientific Research Institute, Instrument Research Institute of the Nanjing Astronomical Observatory of the Chinese Academy of Sciences, Xichang Satellite Launch Center, China Electronics Technology Group Corporation No. 54 Research Institute, the Tenth Research Institute of China Electronics Technology Group Corporation, the Eighth Research Institute of China Electronics Technology Group Corporation, the Fifteenth Research Institute of China Electronics Technology Group Corporation, the Thirty-Sixth Research Institute of CETC, the Xi’an Flight Automatic Control Research Institute of Aviation Industry Corporation of China, the Taiyuan Satellite Launch Center, the Beijing‑1 Satellite Ground Station, China Putian, Shanghai Lizheng Satellite Application Technology, the Shanghai Small Satellite Engineering Center, the Chongqing Transportation Science Research Institute of China Merchants Group, the Railway Research Institute, the Lanzhou Institute of Physics, the …th Research Institute of China Electronics Technology Group Corporation. 12 Research institutes, including the Shanghai Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences and the Institute of Information Science, among others.

The choice of numerous departments and enterprises signifies recognition of Zhongxinchuang’s products and services. Beijing Zhongxinchuang Technology Co., Ltd. was founded in 2002 Year, deeply cultivating the time synchronization field. 22 Year, relying on independently developed core technologies, 7×24 With round-the-clock service support and authoritative testing and certification, we provide reliable time‑synchronization solutions for industries across the board. Moving forward, we will continue to collaborate sincerely with partners from all sectors to jointly achieve win‑win outcomes and shared progress for businesses and society alike!