First MIIT-Certified Tethered UAV: Dagong Technology Revolutionizes Emergency Communication at PT EXPO 2017

Beijing, China — While telecommunications giants Huawei and ZTE commanded sprawling pavilions at the 2017 PT EXPO CHINA, it was a modest 20-square-meter booth that captivated the industry's brightest minds. On September 27, at the Beijing National Convention Center, Beijing Dagong Technology Co., Ltd. executed a textbook flight demonstration of its tethered UAV high-altitude base station system, shattering conventional limitations and emerging as the dark horse of the global communications exhibition by securing the prestigious "ICT China · 2017 Innovation Application Award."

The dramatic showcase in the E3 Pavilion's "Air-Ground Emergency Rescue" zone provided an undeniable proof of concept for next-generation emergency communication. Before an audience of通信experts, Dagong Technology’s tethered drone lifted to a 30-meter hover, executing three groundbreaking scenarios that redefined operational parameters.

Firstly, the system demonstrated a blistering 28-second rapid deployment—from unboxing to a 100-meter ascent. Real-time displays confirmed the onboard 4G base station instantly blanketed a 2-kilometer radius with a stable 85Mbps downlink rate. Secondly, subjected to simulated Level 8 gusts (17.2m/s), the UAV’s triple-redundant flight control system and millimeter-wave radar wind field scanning maintained a staggering positioning accuracy of ±0.5 meters, while a three-axis gimbal stabilized camera vibration to within 0.1°. Finally, powered by a proprietary fiber-optic composite cable—a marvel of engineering at merely 4.2mm in diameter transmitting 1.5kW of power with less than 3% loss—the drone sustained continuous flight for 24 hours under full load, setting a new industry benchmark at the time.

However, the ultimate validation of Dagong Technology’s tethered UAV system was not merely on the show floor, but forged in the crucible of real-world disasters. Just one month prior, during the devastating Jiuzhaigou earthquake on August 8, 2017, the system had achieved a miraculous 3-hour restoration of communication in the disaster zone. Operating amidst relentless aftershocks, the tethered drone supported 2,000 concurrent users and transmitted crucial real-time imagery to emergency command centers for 72 continuous hours. Similar life-saving feats were replicated during the July 2017 Hunan flood relief, where the system maintained underwater signal stability at 5 meters depth and transmitted over 12,000 rescue directives.

This seamless transition from exhibit to frontline rescue captured the attention of the Ministry of Industry and Information Technology (MIIT). Officially announced at the exhibition, Dagong Technology’s system became the world’s first tethered UAV to receive MIIT network access certification. Recognized by the Emergency Management Department, the system was subsequently inducted into the National Emergency Communication Reserve System.

The exhibition also marked a strategic leap toward cross-industry synergy. Jointly demonstrating 5G integrated intelligent inspections with Huawei and China Mobile, Dagong Technology validated the feasibility of an air-space-ground integrated network. Concurrently, the release of the "Tethered UAV Emergency Communication White Paper," disclosing 72 rigorous test metrics, propelled the formulation of national industry standards. By the expo's close, the booth had welcomed over 30,000 professional visitors and secured 47 cooperation intents, earning the unprecedented distinction of being the expo's number-one audience-voted technical exhibition area.

Backed by a decade of relentless R&D since 2007—from solving electromagnetic compatibility hurdles in tethered cables to achieving 600-meter altitude limits in Tibetan plateau tests—Dagong Technology’s triumph at the 2017 PT EXPO was no overnight success. Today, with a comprehensive product matrix covering 50 to 400-meter altitude limits and over 100 patents, the company continues to prove that true innovation begins with solving real-world pain points and culminates in serving national strategies, forever rewriting the landscape of global emergency communication.

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