Unexpected emergency Communication System

Dependable emergency communication plays an important role in emergency response, particularly in big city by using large population, crowed site visitors and dense high properties. Once the natural or even man-made disaster happens, the first responders must manage to communicate reliably with all of the human resources that could happen or will be involved.

1. The Airborne Lte Emergency Communication Base Station(Patron-A10)will be installed on the tethered uav. And through testing, the tethered UAV will certainly hover at different height to compare the different performance.

2. The patrol car equip which includes a vehicle-mounted CPE(Knight-V10)will patrol while in the city to test the length of time distance does the bottom station(Patron-A10) can cover.

SEVERAL. Four people with Broadband Trunking Handset(Cuckoo-HT2)walk surrounding the base station to analyze the effective range for any handset.

4. The commander center located in a police station 3km for away from the UAV with a 2watts CPE(Knight-M2) is good for commanding and dispatching depend on the dispatch console video clip and voice communication with patrol car along with the four patrol people.

3. Preparation Work

Tethered UAV

①　Rapidly deploy drone and airborne base station after coming to the test site:

②　Fuel the generator and turned the idea on quickly.

③　Place the drone in the biggest market of the site and deploy the energy cord required by this drone

④　Connect the system towards the power source and wait for the takeoff command.

Your whole process took 9minutes.

Release The Command Center:

①　The command center was deployed in the security room of the population Security Building.

②　Install the CPE, antenna, Portable Multimedia system Dispatching Console.

③　Power the gear. Wait for the technique running normally.

④　Wait for your start command.

The total deployment took 2minutes.

Deploying That Patrol Car

①　Install your camera, LTE 4G Private Multilevel CPE and antennas on the patrol car.

②　Power for the system and wait for your system to work usually.

③　Wait for the begin command.

The entire deployment required 2minutes.

Deploying the phone

①　Four staff members keep one Broadband Trunking Handset for their hand and ready to walk around the station.

The entire deployment went on 1minute

Configurating and Inspecting The System Main Parameters:

Base station frequency wrist band: center frequency 594 MHz, 10M cell bandwidth. §

Base station power: single channel 10W having 6dbi antenna. §§

Vehicle-mounted backhaul CPE default energy: 5W with 3dbi antenna.

That Broadband Trunking Handset default electric power: 200mw and the antenna attain is 1. 5dbi.

SEVERAL. The Entire Testing Progression

1. The drone shot to popularity and hovered at 80~ 90meters height.

2. the patrol car departed as outlined by the scheduled route. The camera’s video was send back to command center via the actual CPE in real-time

3 OR MORE. The four patrol workers began to walk around at random and communicate with the command center in real time by voice and training video.

The vehcile mounted CPE testing result

The Patrol Car Drives Across the Road Towards to this Bridge.

Video during all the driving process from the starting place to the bridge is apparent and smooth, and there is only awhile stuck when the car turning half. And the corner is definitely 7. 4km away through the UAV base station. The specific test process is established below (green for smooth video clip, yellow for stuck training video, red is lost online video media connection)

There is continuous high-rise congestion between the signal interruption position in the vehicle CPE and the drone. The arrow down below shows the occlusion scenario:

The figure right shows the last video screen seen because of the command center. After the vehicle enters the depth from the building and the auxiliary road of the Bridge, the signal seemingly blocked and the mark connection is interrupted.

The picture around the left show the car travels while in the opposite direction of the best route. After a timeframe, the patrol car was quickly blocked by the mountain, and then the CPE lost the call, but the video quality was huge before the loss. The suitable test process is shown inside the below figure (green for smooth video, yellow pertaining to stuck video, red intended for lost video connection)

Broadband internet Trunking Handset Test Effects

The effective transmission distance with the Broadband Trunking Handset is about 3. 8km. The quality of real-time video transmission throughout the test is very excessive. Except the video is slightly stuck in the place 1. 3km from your drone because of transmission blocked, and during many of the rest places the training video is smooth and clear. The specific test process is shown inside the following figure:

(green regarding smooth video, yellow intended for stuck video, red pertaining to lost video connection)

Conclusion

Compared with other emergency methods, the solution that deploys base station in the air through UAV features the characteristics of quicker deployment, more flexible marketing web, wider coverage, and more substantial user capacity.

This test verified the working performance from the airborne integrated base place (BBU+RRU+dispatching station+core network) to the tethered drone. The whole system need a shorter deployment time to achieve quickly answer on-site emergency communication receive requirements. During the entire test, the UAV hover time is 3 working hours and 40 minutes.

According to the test results, so as to avoid mountain or substantial building blocking signal tranny, the hovering height belonging to the drone can be raised in order to resolve the problem. The effective coverage radius from the airborne base station is concerning 10km. In suburban ecosystem, the deployment point may be selected within the collection of 5-7km, and inside urban environment, the deployment points is usually selected within 3-5km.

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