Introducing 4G Connection for Drones with DJI Cellular Dongle

Extend your drones operational range with 4G connectivity using the DJI Cellular Dongle

By DJI Enterprise DJI Enterprise
August 27, 2024

In today's rapidly advancing technological landscape, drone operators are looking to increase their ability to fly drone operations by diversifying their missions while simultaneously enhancing operational efficiency and safety. Our latest innovation, the DJI Cellular Dongle, is a game-changer in this regard. It allows drone operators to operate drones from distances across a diverse range of missions by providing an advanced 4G transmission redundancy to the pilot via the DJI Cellular Dongle. [1] This capability represents a significant leap forward in drone technology, offering unparalleled range and connectivity to your drone for complex mission environments. Learn about the essential features of the DJI Cellular Dongle and its capability of providing users with an advanced 4G transmission to their drone for increased operational scenarios.

Seamless Integration with Existing Products

The 4G Enhanced Transmission system is designed to work seamlessly with existing drone models and controllers. It is compatible with various enterprise drones, including the M350 RTK, M300 RTK, M30T, Matrice 3D/3TD, and Mavic 3E/3T/3M. The integration process is straightforward, requiring the addition of a 4G dongle to the drone and the DJI RC PLUS or DJI RC PRO Enterprise remote controller, making it accessible for both new and existing drone users. It also works seamlessly with the DJI Dock 2. This wide range of compatibility ensures that enhanced 4G transmission can boost the capabilities of any flight operation you need to perform.

Dual-Mode Operation with OcuSync

OcuSync is an integrated high-resolution video transmission system that provides wireless connectivity between your remote controller and your drone. One of the standout features of the enhanced 4G transmission system is its ability to operate in dual modes with OcuSync. Under normal conditions, the system uses OcuSync for high-quality, low-latency image transmission. However, in scenarios where OcuSync encounters interference or obstruction, the system automatically switches to 4G, either augmenting the transmission or taking over entirely if OcuSync is disconnected. This ensures continuous and reliable communication between the drone and the remote controller.

 

ocusync 1

Connectivity Under Normal Conditions

 

ocusync 2

Connectivity Under Interference or Long-Distance Transmission Conditions

 

ocusync 3

Connectivity Under Complete Disconnection Conditions

Enhanced Transmission Range and Quality

By using 4G connectivity, the range and quality of transmission are significantly improved. This is especially beneficial in urban areas where traditional signals can be obstructed. The enhanced 4G transmission system allows drones to operate over longer distances [2] with stable and precise image transmission, ultimately enhancing situational awareness and operational effectiveness.

 

Drone Signal Connectivity4G Enhanced Transmission

Support for Network RTK

The enhanced 4G transmission from the DJI Cellular Dongle system also supports Network RTK (Real-Time Kinematic) data transmission. This is particularly beneficial for missions requiring high-precision positioning, such as LiDAR point cloud collection for detailed 3D mapping. The ability to maintain RTK connectivity even when the primary radio link is lost ensures that the quality and accuracy of the collected data are preserved.

Private Deployments and SDK Availability

For organizations or users with specific security and data privacy requirements, DJI offers an SDK for the private deployment of the enhanced 4G transmission service. This allows end users to set up the 4G transmission service on their local server and configure it using the Pilot App. Consequently, real-time video streaming can be transmitted from the aircraft to their local server and then to the remote controller via 4G network.

Users who want to deploy their private 4G Transmission service can apply for a SDK License using the following link: https://developer.dji.com/resources/server/free/

You can also refer to a tutorial video HERE on how to deploy this service.

Benefits for Customers Using Drones

1. Increased Operation Range and Flexibility

The DJI Cellular Dongle provides an enhanced 4G transmission system that significantly extends the operational range of drones. This allows them to be used in diverse and challenging environments. This is particularly advantageous for missions that require operations beyond the visual line of sight, [1] such as infrastructure inspections, agricultural monitoring, and search and rescue missions. Maintaining a reliable connection over longer distances enhances the effectiveness and safety of these operations.

 
2. Improved Safety and Reliability
 
Safety is a paramount concern in drone operations. The dual-mode operation of the enhanced 4G transmission ensures that there is always a backup communication link available. In the event of interference or signal loss with OcuSync, the system seamlessly switches to 4G, preventing potential accidents and ensuring that the drone remains under control. This redundancy is crucial for high-stakes operations, such as emergency response and public safety missions.
 

DJI RC ControllerDJI RC Controller

3. Enhanced Data Accuracy and Quality

For applications that rely on high-precision data, such as surveying, mapping, and environmental monitoring, the Cellular Dongle's enhanced 4G transmission provides a reliable solution for maintaining data integrity. The support for Network RTK ensures that positional data remains accurate even in challenging conditions. This leads to more precise and reliable outputs, improving the overall quality of the collected data.
 
4. Real-Time Data Transmission
 
In scenarios where real-time data transmission is critical, such as live video streaming during surveillance or search and rescue missions, the enhanced 4G transmission excels. The ability to transmit high-quality video in real time allows for better decision-making and coordination with partners and agencies. For instance, real-time video feeds can be relayed to command centers in public safety operations, enabling prompt and informed responses.
 
5. Cost-Effective and Scalable Solution
 
The modular nature of the Cellular Dongle makes it a cost-effective solution for organizations of all sizes. Users can start with basic setups and scale up as needed by adding more 4G dongles and leveraging the private deployment SDK. This flexibility allows organizations to tailor the system to their specific needs and budget constraints.

Get Started Now

The DJI Cellular Dongle and enhanced 4G transmission system represents a transformative advancement in drone technology, offering significant benefits across various applications. By enhancing transmission range, improving safety and reliability, and supporting high-precision data collection, this system empowers operators to push the boundaries of what drones can achieve. Whether it's for urban monitoring, disaster response, agriculture, or infrastructure inspection, the enhanced 4G transmission system provides a robust and flexible solution that meets the evolving needs of drone operators.

Compatible Dongles / Accessories for Different Aircraft Models

Product Mandatory Items Optional Items
Mavic 3 Enterprise Series

DJI Cellular Dongle

DJI Cellular Dongle Mounting Kit

DJI Cellular Dongle for remote controller

Note: It is not needed if you connect the remote controller to Internet via a Wi-Fi connection

Matrice 30 Series Matrice 30 Series 4G Dongle Kit N/A
Matrise 350 RTK / Matrice 300 RTK Matrice 350 RTK 4G Dongle Kit N/A
Dock 2 & M3D Series

DJI Cellular Dongle 2 for M3D Series drones

DJI Cellular Dongle 2 for Dock 2

Note: It is not needed if you connect the Dock 2 to internet via ethernet

Note: The Matrice 300 RTK uses the Matrice 350 RTK 4G Dongle Kit and DJI Cellular Dongle, it needs to be paired with the DJI RC Plus remote controller.

Frequently Asked Questions

1. What are the 4G signal strength requirements when using enhanced 4G transmission ?
 
To ensure a clear and smooth transmission experience, a network speed of at least 5Mbps (uplink) is generally required (the actual transmission experience is related to the local 4G network signal conditions). The 4G network signal conditions include the network status of the drone in the sky and the remote controlled on the ground. Weak or no signal, or network congestion at either end, can lead to a degraded 4G transmission experience, resulting in issues such as image transmission lag, significant control delay, or even loss of image transmission and control.
 
Therefore, when using enhanced transmission, please pay attention to the following:
 
  • Always choose a location where the 4G signal on the remote controller or mobile device is nearly full to operate the drone for a better enhanced transmission experience.
  • Enhanced transmission uses 4G network transmission. After the OcuSync is disconnected, flying entirely on 4G may have some delay and lag. Fly with caution.
  • When the OcuSync image transmission signal is weak or disconnected, maintain an appropriate flight altitude. In open areas, try to fly below 120 meters to get a better 4G signal.
  • In environments with tall buildings, set an appropriate return-to-home altitude (higher than the buildings).
  • If you are in a restricted flight area with many tall buildings, ensure the obstacle avoidance and bypass function is enabled, and fly with caution.
  • Beyond visual line of sight (BVLOS) flights are not recommended, especially at night.
  • If the DJI Pilot 2 app indicates a weak image transmission signal, fly with caution.

 

When using the DJI Cellular Dongle, is it normal for the 4G signal bars to fluctuate continuously on the ground or in the sky?
 
4G signal transmission relies on public cellular telecommunication networks, which is mainly reflected in the following two aspects:
 
  • Network Speed: This is primarily determined by the 4G signal strength from the location of the pilot and the aircraft's flight location, as well as the level of network congestion at the corresponding base station.

  • Network Load: In dense population areas, base station resources are relatively limited, and many users share the base station resources. As a result, each user may experience less bandwidth resources and larger real-time latency. Since 4G transmission uses the mobile network provided by operators for data transmission, the actual transmission experience is related to the local 4G network quality. The 4G network quantity includes the network status at both the aircraft end and the ground end. Weak or no signal, or network congestion at either end, can lead to poor 4G signal quality, such as fluctuating 4G signal bars, image transmission lag, significant control delay, or even loss of image transmission and control.

Footnote:
[1] Before purchasing and using the 4G Transmission service, make sure to check your local regulations regarding the use of 4G transmission for drones and obtain the necessary approvals/waivers.
[2] Make sure to refer to your local drone regulations before flying. Always maintain a visual line of sight of your drone unless you have the necessary waivers and approvals.
 
Additional note:
1. This service is not available in the U.S. and other regions. Make sure to check the local regulations or reach out to DJI to confirm its availability.
2. Please check local regulations in regards to the use of LTE service with drones, for example, UK operators must get permissions from local regulators.
 
Want to learn how to privately deploy the 4G enhanced link data relay service? Click the video below to learn now:
 

 

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Tags: Drone Ecosystem, Product Innovation

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