Three demand analysis of smart street lights
3.1 Wireless coverage requirements
The development of WLAN allows people to get rid of the shackles of cables, and can access network resources more conveniently, flexibly, and quickly. People's demand for WiFi is becoming stronger. Nowadays, coupled with the popularization of mobile smart terminals, almost everyone has a mobile terminal. People want to be able to access the Internet anytime and anywhere, surf the web, search for information, browse news, post photos, send and receive emails, etc.
3.2 Wireless bridge backhaul requirements
In the process of wireless network deployment, wireless APs are placed on street lights about every 100m. Then the wireless APs on each street light need to pull network cables or optical fibers, which leads to high construction costs, so in the process of smart city construction In this case, bridging technology is often required, and wireless bridging technology is required to be used without reducing the performance and use of the equipment.
3.3 Monitoring access requirements
How to make the places where we live safer, how to build a strong security network to ensure the safety of the entire city, the use of scientific and advanced technical defense methods is the most effective, and has become a hot topic of most concern.
Use WLAN to provide access services for monitoring facilities deployed in various areas. Through the image monitoring system, the public security department can realize online visual security patrols, 110 police situation immediate handling, dynamic real-time control of public complex places, detection of motor vehicle cases, and Some cases are prone to waiting, tracking and so on.
3.4 Other expansion requirements (sensors, etc.)
In the process of smart city construction, smart light poles are often used as an entry point. In the process of smart light pole construction, some other businesses need to be expanded, such as LED large-screen display, PM2.5 detection, temperature and humidity sensors, etc.
Four smart street light solutions
4.1 Wireless networking architecture of smart street lights
4.1.1 Topology diagram of smart street lamp wireless networking
The entire wireless network adopts a thin AP+AC network architecture
Central end: Deploy a wireless controller in the central computer room and hang the wireless controller on the core switch. Street lamp end: Install AP on the street lamp. The root AP is connected to the operator line through the wired network and can bridge 2 APs.
4.1.2 Wireless RF planning for smart street lights
Since the wireless AP part used this time transmits data back through bridge connection, we use dual-frequency wireless AP. Use 5G to transfer data back and forth, and 2.4G for wireless coverage. Due to the uncertainty of the urban environment, it is recommended to bridge APs no more than two hops to achieve better results. If the number of bridge hops is too much, it will cause huge traffic pressure with the AP, and the wireless network will be unstable. So 2 jumps are recommended.
4.1.3 Wireless side quality indicators
l Wireless coverage signal strength
At more than 95% of the design target coverage area, the received signal strength is greater than or equal to -65dBm.
l User authentication test
Test the main WEB certification, repeat the access test 20 times for different APs, and the WEB certification pass rate>=95%
l Website visit success rate, homepage response delay test
It is required that the success rate of visiting domestic hot websites is not less than 99%; the display delay of visiting domestic websites is not more than 3 seconds; the display delay of visiting international websites is not more than 5 seconds
l Signal to Noise Ratio (SNR)
In more than 95% of the design target coverage area, the signal-to-noise ratio (SNR) received by the user terminal's wireless network card is greater than
25dB。
l Same frequency interference test
For multiple AP coverage areas, check whether there is co-channel interference. Co-channel interference is less than -80dBm, and adjacent channel interference is less than -70dBm. l Signal leakage
The indoor wireless signal leaks to the outdoor area, and the signal strength at 10m is not higher than -75dBm.
l PING package test
PING wireless controller IP address delay is not more than 50ms; Ping packet loss rate is not more than 3%.
4.1.4 Outdoor AP
NAP-8000 outdoor wireless access point is a self-developed outdoor high-speed wireless access device that supports 802.11a/b/g/n/ac dual-band concurrent. Adopt 3x3 MIMO technology, support 11ac/a/n and 11b/g/n dual-frequency concurrency,
The whole machine can reach up to 1750Mbps. The equipment adopts Gigabit Ethernet port uplink to ensure wireless high-speed transmission; adopts PoE remote power supply to make network deployment easier.
NAP-8000 adopts the IP 68 highest protection grade shell design, supports fully enclosed waterproof, moisture-proof, dust-proof, fire-proof, sun-proof, etc. It can still be used normally in extremely harsh outdoor environments, which can effectively avoid outdoor bad weather and environmental impact , Whether it is in the humid south or cold north is applicable. NAP-8000 also supports point-to-point and point-to-multipoint relay bridge functions, which improves the feasibility of outdoor networking solutions. Together with the NAC series controllers, it brings users an unprecedented fast experience and safer business access.
4.2 Smart street light IoT networking architecture
4.2.1 Topology Diagram of Smart Street Light Internet of Things
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4.2.2 Smart street light IoT architecture
The IoT platform is deployed in the computer room, or you can use the public cloud IoT platform to open the relevant account. Sensor equipment is deployed in each light pole, and the sensor equipment can be connected to the network through wifi or through the lora gateway.
4.2.3 Introduction to smart street light IoT front-end equipment
1. Intelligent power strip
The smart power strip has two specifications, namely: wifi specification and lora specification.
2. Temperature and humidity sensor, PM2.5 sensor
The sensor can effectively detect the urban environment, temperature, humidity, etc. You can access the IoT gateway through the lora protocol, and access the IoT platform through the wired Internet. The IoT platform can analyze and process the data collected by the sensors.
4.3 Profitability analysis of smart street lamps
4.3.1 Rent
Similar to the current broadband Internet access method, users who need long-term wireless Internet access are opened through designated locations, and certain time permissions are set for the Internet accounts. The service fee is charged directly, and free promotion may be adopted during the early trial period.
4.3.2 Advertising
WiFi serves as an Internet business portal. Through free WiFi, a national WiFi advertising alliance is gradually established. When the number of users grows to a certain number, commercial advertisements will be broadcast in rotation. Each city is gradually led by excellent agents to set up marketing centers to be responsible for O2O entrance, advertising media operations, big data and other businesses.
Users can use wireless city Internet services for free, and third-party operating agencies use free thinking to rapidly develop users, and achieve sustainable development and continuous profitability through advertising media and data value-added services.
4.3.3 Big data
By collecting the usage habits of users who use wireless networks and the types of websites visited, analyze and provide different services. Through the establishment of an O2O marketing center, precise advertising is carried out.
1. At the same time, place the advertisement of the merchant on the WIFI landing page, and the advertisement space can also be sold, which will bring additional continuous income;
2. Mark the merchant’s "slogan" or "business name" in a prominent font on the advertisement page, and the customer enters the "slogan" or "business name" on the landing page to obtain wireless network services to achieve the purpose of enhancing the advertising effect.
4.3.4 Data interface
Provide user-related data to Internet companies or use them in the international market, or provide Internet companies with data analysis interfaces, similar to big data.
4.4 Wireless City Compatibility Solution
4.4.1 Compatible with wireless Internet billing system
The wireless controller is compatible with the existing authentication and billing systems of the operators, and can be connected with the billing systems such as Ruijie SAM, Radius, Urban Hotspot, and Abyss.
4.4.2 Compatible with wireless devices from other vendors for unified certification
Due to the uneven deployment of wireless networks in cities, some areas have already deployed wireless devices in the early days, while some areas have not yet been deployed, and in areas where wireless devices have been deployed, the equipment vendors deployed are also different, resulting in wireless devices in the entire city. It conducts unified certification management.
As a portal server, the wireless controller can be connected to other vendors' equipment for unified authentication. Account authentication can use the built-in account server or connect to an external account server. Guest authentication support: SMS authentication, WeChat authentication, temporary visitor authentication, user-free authentication.
The topology diagram is as follows:
In addition, the wireless controller acts as a portal server and can also be used as a wired end authentication. It can also support visitor authentication and account authentication. Account authentication can use the built-in account server or connect to an external account server. Visitor authentication support: SMS authentication, WeChat authentication, temporary visitor authentication, user-free authentication.
The wireless controller can be used as a portal client to connect to an existing portal server. Portal servers that support docking include: wireless controller portal, Sangfor portal, H3C portal and all portal2.0 servers.
The topology is as follows:
Six case introduction
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- Pingdingshan Wireless City, Henan
Construction background
In the era of mobile Internet, people cannot do without mobile phones, let alone the Internet. Because of its convenience and speed, Wi-Fi has become one of the main ways for modern people to surf the Internet. In order to implement the relevant requirements of the "Notice of the Central Committee of the Communist Party of China and the State Council on Printing and Distributing the National New Urbanization Plan (2014-2020)" and the "Several Opinions of the State Council on Promoting Information Consumption and Expanding Domestic Demand", the Xinhua District Government Information Project Under the leadership of the government, the "Wireless City, Smart Xinhua" project was built.
According to the plan, this free Wi-Fi installation involves a total of one to three phases of planning:
The area covered by the first phase of the project mainly includes Tiyu Road, Zhongxing Road, Kaiyuan Road between Miningong Road and Jianshe Road, Mining Road and Jianshe Road between Kaiyuan Road and Sports Road, Heping Road, and between Zhongxing Road and Kaiyuan Road. Yuyou Road has basically formed a "Tian" character, and it was put into trial operation in July 2015.
The second phase will achieve full coverage of hot spots such as intersections, crowded centers, schools, and convenient places.
The third phase will be extended to the west of Jianshe Road to the vicinity of Bailuzhou National Urban Wetland Park.
Solution value
To achieve full wireless free Wi-Fi coverage in the main areas of Pingdingshan urban area, citizens no longer have to worry about not having wireless free Wi-Fi when shopping.
After the "Wireless City, Smart Xinhua" project is fully implemented, it can accommodate 50,000 people surfing the Internet at the same time, and citizens can surf the Internet for free whether they use a computer or a mobile phone, as long as the device supports Wi-Fi network access.
The "Wireless City, Smart Xinhua" project has been registered with the municipal public security network supervision, industry and commerce and other departments, and the actual name has been verified through mobile phone text messages.
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- Guilin Zhongshan Middle Road Wireless City
Construction background
Guilin Zhongshan Road is the most prosperous area in Guilin, the north-south traffic artery and the famous landscape avenue. In order to provide people living in Guilin and tourists visiting Guilin with a more convenient and effective terminal Internet environment, in 2015, the Guilin Municipal Government proposed a wireless city coverage for Guilin. The first phase of the project started from the most prosperous Guilin city. Construction of Zhongshan Road in the area began.
Construction Content
This time, the Guilin Municipal Government used technical equipment to wirelessly cover Zhongshan Road. This time, the wireless network coverage is provided for free to the users and tourists in Guilin streets. The technology is based on the actual situation of the main road wireless Wi-Fi coverage. Wireless APs are deployed in newsstands along the street, and each newsstand is broadband access, and finally aggregated to the central computer room.
Solution value
The wireless network coverage is free for users, passers-by, and tourists in Feiguilin Street. Follow the WeChat official account (Guilin from the perspective of Guilin) through WeChat and portal page authentication for application promotion. In the later stage, the platform will serve as the entire Guilin local service platform, integrating local tourism, scenic spots, hotels, specialty products and other resources in a one-stop manner.
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- Wireless City of Wuwei City (Liangzhou District), Gansu
Construction background
Liangzhou District is located in Wuwei City, Gansu Province. Liangzhou District has 19 towns and 18 townships, 2 ecological construction headquarters, 7 urban street offices, and a total area of 5081 square kilometers. There are 449 administrative villages inhabited by Han There are 25 ethnic groups, including Hui, Hui, Tibetan, and Manchu, with a total population of 1.0225 million.
The wireless city project in Liangzhou District, Wuwei City, is mainly for Wi-Fi coverage in indoor (large supermarkets) and outdoor areas (squares, streets, public areas) in the main urban area. Wi-Fi is deployed in this project. There are more than 2,000 points, and the project is still under construction.
Solution value
After the completion of the wireless city project in Wuwei City (Liangzhou District), Gansu, it will provide free wireless Internet services for public areas in the main urban area of Liangzhou District, and realize the following wireless added value while providing Internet access.
1. WeChat authentication will increase the attention of the city's WeChat public account.
2. User information collection (WeChat ID, mobile phone number).
3. Crowd flow analysis function.
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