Caltta PDT Trunking System Safeguards Jilin Expressway Police

Jilin, as the geometric center of Northeast Asia, is not only an important gateway for the "Belt and Road" initiative to the north but also holds the significant responsibility of maintaining national border security. With the rapid development of expressway construction and the increasing demand for security management in Jilin Province, building an efficient, stable, and intelligent public security communication network has become a critical support for ensuring public safety and enhancing emergency response capabilities.

Caltta, leveraging its deep expertise in private network communication technology, has built a PDT digital trunking system based on SDR technology for the Jilin Provincial Public Security Department's Expressway Public Security Bureau, thoroughly enhancing the intelligence and professionalism of the province's highway public security communication system.

Project Background: High-speed Development with a Focus on Safety

The Jilin Provincial Public Security Department's Expressway Public Security Bureau, as the backbone of traffic safety, security management, and criminal investigation on the province's expressways, administers six detachments in Changchun, Jilin, Siping, Tonghua, Songyuan, and Yanbian, and is responsible for the security of over 5000 kilometers of expressways. According to the "Jilin Province Main Highway Network Long-Term Planning (2023-2035)," the total planned mileage of expressways in the province will reach 7212 kilometers, with an expanding coverage area and increasingly heavy security and control tasks.

Meanwhile, facing challenges such as long borderlines, heavy security tasks, and frequent large-scale events, the original communication system urgently needs an upgrade to meet the practical command needs of cross-regional, cross-police force, and rapid linkage.

Communication Challenges: Complex Scenarios Call for Intelligent Responses

According to the unified deployment of the Ministry of Public Security and the Provincial Public Security Department, Jilin Province needs to accelerate the construction of a 350 MHz PDT private network communication system to strengthen unified command, risk warning, and emergency response capabilities. However, in reality, the complex topography of expressways, high traffic volume, and frequent incidents make it difficult for traditional communication systems to meet the requirements in terms of coverage, dispatch efficiency, and emergency response.

In this context, a communication system that is flexibly deployable, broadly covered, and highly integrated has become the core support for the transformation and upgrading of highway public security.

Solution: Reshaping the Communication Landscape with SDR at its Core

Caltta has customized a PDT digital trunking system solution based on SDR technology for the Jilin Provincial Public Security Department's Expressway Public Security Bureau. Through the implementation of phase one and phase two projects, a widely covered, stable, and intelligent public security private network has been established.

The construction includes:

• Establishing core PDT networks, dispatch, recording, and network management systems;

• Deploying nearly two hundred ground and tunnel base stations, and building a backbone communication network;

• Equipping hundreds of handheld terminals, vehicle-mounted radios, and base station equipment to meet daily law enforcement and emergency communication needs;

• Introducing self-organizing network base stations and an encrypted authentication platform to enhance emergency dispatch and communication security.

This system achieves full coverage of 22 expressways across the province, serving 13 highway public security sub-bureaus and management offices, special service detachments, and is widely used in daily duty, major security, emergency response, and cross-regional collaboration scenarios.

Technological Highlights: Injecting "Smart Momentum" into Public Security Operations

BS8700 Base Station

The world's first PDT digital trunking base station BS8700 based on SDR technology increases deployment efficiency by 30-50%, reduces power amplifier energy consumption by 80%, features four-way diversity reception, and long-distance coverage, making it particularly suitable for complex environments such as tunnels and mountainous areas, significantly enhancing network construction efficiency and communication coverage capabilities.

Interconnection and Unified Dispatch

The system supports interconnection with the Provincial Public Security Department and local PDT platforms, breaking down information silos and achieving unified communication dispatch across the province.

Visualized Command and Dispatch

Equipped with PGIS geographic information systems, the system enables a command structure that links maps with voice, enhancing the visibility and efficiency of incident response.

Secure Encrypted Communication

The deployment of an authentication and encryption platform meets the high standards for communication confidentiality and access control required by public security systems.

The upgrade of the Jilin expressway public security communication system is not only a technological innovation but also another practice of Caltta empowering the public security with technology and safeguarding public safety. In the future, Caltta will continue to deepen collaborative innovation with public security systems, promote the deep integration of intelligent communication and practical applications, support the high-quality development of smart policing, and provide solid support for social governance in the new era.