From MWCS 2017 Debut to 4K Aerial Mastery: How Dagong Technology's Tethered UAV Rewrote Broadcast History

Shanghai, China — On June 28, 2017, amidst the deafening roar of drone racing at the Mobile World Congress Shanghai (MWCS) at the SNIEC, a silent technological revolution was unfolding in an unassuming corner of the exhibition hall. A tethered UAV, grounded by a single cable, demonstrated the capability to hover indefinitely—marking the industry's debut of a technology that would fundamentally shatter the 30-minute battery curse of traditional drones and, within eight years, entirely rewrite the rules of global broadcast live-streaming.

While the 2017 MWCS spotlight focused on consumer drones and 5G trends, it was the nascent tethered UAV systems that offered a glimpse into the future of persistent aerial operations. Connected to ground power via a specialized photoelectric composite tether cable—aptly described as an "umbilical cord linking sky and earth"—these early platforms proved their immense value in emergency communication alongside telecom operators. However, the engineering pioneers at Beijing Dagong Technology Co., Ltd., who had already been quietly refining this technology since the company's inception in 2015, foresaw a far more transformative application: broadcast-grade aerial live-streaming.

The transition from emergency communication to high-definition live broadcasting required conquering three formidable technical bottlenecks: power system stability, broadcast-level image transmission quality, and robust wind resistance. Traditional wireless drone feeds were notoriously vulnerable to signal dropout and interference, incapable of meeting the stringent demands of television broadcasting. Dagong Technology’s ingenious solution was to utilize the tether cable not just for power, but as a dedicated fibre-optic highway for data. This guaranteed an unwavering, ultra-high-definition video feed back to the broadcast truck, immune to the electromagnetic interference that plagues wireless transmissions.

The ultimate vindication of this eight-year technological crusade arrived on July 1, 2021. During the CPC Centenary Celebration at Tiananmen Square, Dagong Technology’s tethered UAV system defied complex urban airflow to hover at a precise 100-meter altitude, delivering a breathtaking 4K ultra-high-definition "Helmsman's Perspective" to a global audience. Overcoming violent gusts with Level 6+ wind resistance, the system flawlessly transmitted a colossal 12G bandwidth baseband live signal directly into the national broadcast network—a feat utterly impossible for battery-dependent drones or traditional cable-suspended camera systems like Spidercams.

Today, the legacy of that pivotal 2017 MWCS debut has propelled tethered UAVs far beyond their origins. They have evolved into indispensable "airborne new infrastructure" across multiple sectors:

· Major Event Broadcasting: Providing permanent, stable aerial shots for national celebrations and large-scale sports events.

· Cultural Tourism: Elevating visitor experiences with persistent, unique aerial perspectives over scenic districts.

· Emergency Communication: Rapidly deploying high-altitude base stations during disasters to restore critical networks.

· Security Monitoring: Executing wide-area, 24-hour uninterrupted surveillance.

As the global low-altitude economy accelerates, Dagong Technology is already spearheading the next evolutionary leap: transforming the tethered UAV from a mere "aerial camera" into an "intelligent airborne node." Powered by 5G integration and artificial intelligence, future Dagong systems will feature automated obstacle avoidance, intelligent tracking, and multi-machine coordination. From a quiet exhibit in Shanghai to the backbone of broadcast television, Beijing Dagong Technology has proven that a single, resilient tether is all it takes to anchor the future of the skies.