With the accelerated development of the global economy, the global population is also expanding rapidly, the demand for natural resources is also increasing, the ecological environment is increasingly damaged, and many precious species are on the verge of extinction. In recent years, the country has attached more and more importance to the harmonious and sustainable development of society, and the efforts for ecological protection have been increasing. A series of rare animal and plant protection areas have been established to protect these endangered species, and a series of achievements have been made. However, with the development of science and technology, manpower alone can no longer meet the further protection of the protected areas, and the installation of advanced video surveillance systems has become an imperative need.

A small island near the coast was designated as a protected area by the state in the early years because of the large number of rare animals living there. The island is about 15 kilometers offshore. In the past, it was only protected by regular patrols by manpower, which wasted a lot of manpower and material resources, but did not achieve a good protection effect. A more advanced and efficient protection solution is urgently needed.

2. User solution design and thinking

In view of the above situation of the user, it is necessary to establish a video surveillance system on the island to observe and study the precious animals on the island, so as to achieve the protection of the birds on the island and avoid being disturbed by irrelevant people. For some special places, warning devices and shouting devices can also be installed. When irrelevant people enter, they can be shouted remotely to leave the protected area as soon as possible. When installing video surveillance on the island, if there is mains electricity, it can be used directly; if there is no mains electricity, solar energy and wind energy can be used to power the monitoring equipment.

Since the island is far away from the shore, if traditional wired deployment is adopted, it will be a huge expense and there will be a large maintenance risk. Therefore, the solution recommended by our company to users adopts the transmission mode of wireless digital bridge to avoid the disadvantages of traditional wiring. The construction period is short, and maintenance is simple and convenient.

When designing the wireless solution, follow the following system design principles: This design mainly implements the two main lines of "high quality" and "low cost". It also takes into account construction, maintenance and operation factors, and will leave room for expansion for future development, increased maintenance and other factors. The design content of this system is systematic, complete and comprehensive; the design plan is scientific, reasonable and operational.

3. Discussion on the implementation of the specific plan

In this plan, there are two parts. The first part is mainly the use of digital wireless equipment to summarize the monitoring points on the island and summarize them to the commanding heights of the island. The second part is to transmit the monitoring video on the island to the monitoring center on the shore through wireless equipment over long distances.

Part I:

Summary of surveillance cameras on the island; Due to the short distance, our company's 5G wireless device SF-5040G can be used for summary. As shown in the figure above, 6 observation points are set up on the island. The distance between each observation point is about 1-2 kilometers, and it is distributed in an irregular ring as shown in the figure above;

Nodes A, B, and F are group 1, and F and D are medium-distance forwarding nodes, that is: A and B collect the obtained signals and pass them to node F through SF-5040G, and node F passes them to the remote node through SF-5040G

. Nodes C, D, and E are group 2, and F and D are medium-distance forwarding nodes, that is: C and E collect the obtained signals and pass them to node D through SF-5040G, and node D passes them to the remote node through SF-5040G

. Part 2:

The highest point of the island is transmitted to the monitoring center on the shore; after the remote node obtains the data, it transmits the signal data to the monitoring convergence center 15KM away through the SF-5040G25 , a 25dBi high-gain flat antenna, so that the monitoring center can observe the situation on the island in real time, and at the same time, the feedback signal and control signal of the convergence center can be sent to each terminal camera to achieve the corresponding operation action. In addition, if the number of surveillance cameras on the island is increased later, our company's Gigabit backbone wireless transmission equipment SF-5000MS must be used in this long-distance transmission section.