Taking into account the winter high temperature weather and summer high temperature weather in China, key components in streetlight monitoring systems use military grades. And in front of the factory, the product is uniformly low-temperature and high temperature aging.
We can choose GPRS as a systematic communication method. At present, most cities in my country will open the GPRS business, which is the mainstream transmission resource used in the future light monitoring system, which is an inevitable trend of street lamp monitoring system.
In the past, the road light inspection is a work that takes a lot of manpower for the municipal department. Now the application of the GPRS network in this area has automated the inspection. Xiamen Blues Communications Co., Ltd. and system integrators jointly developed the night-view lighting monitoring management system for special development of the 5th City Games Municipal Department, using advanced GPRS networks, integrating computer, communication, electromechanical, automatic control and other advanced technologies , Successfully realize real-time monitoring and management of night lighting systems and streetlights, ensuring efficient and stable, all-weather operation.
Compared with the night lighting system of other cities, it is obvious. The China Mobile's GPRS network is used by the China Mobile, is the mainstream technology and must be routed by the third generation mobile communication. With the advantages of always online, quick login, high-speed transmission, measure charges, free handover, overcome the length of the construction period such as wired communication, wireless cluster, CDMA, etc., large investment scale, network coverage, unsuccessful technology, The terminal supports less disadvantages, improves the system's scientific and technological content, ensures the stability of the system, greatly reduces the system's construction investment and operational costs, and upgraded a good foundation for future system, is the most ideal night lighting monitoring management system.
Regardless of the function or from reliability, there is no wireless network can be compared with the mobile communication network. Overall, there is the following advantages:
First, cover the area wide, the current coverage of mobile communication networks is over 95%, and the coverage rate of non-side area is almost 100%. GPRS users can distribute and move their own network points at will, without having to worry about the maintenance of the line or the communication interruption caused by the wire during transfer. Construction of new monitoring points does not need to be worked, embedded and other. Compared with fiber, or small investment in the specialline system is convenient. The communication distance is far from any occasions. The coverage is better, relatively many wireless data networks (clusters, two-way paging, CDPD, CDMA), the network coverage is the best.
Second, GPRS network access speed is fast, providing seamless connection with existing data networks. Since the GPRS network itself is a packet data network, support TCP / IP, X.25 protocol, so there is no need to pass through networks such as PSTN, directly with the packet data network (IP network or X.25 network), access speed For a few seconds, it is fast than the circuit data service. With TCP / IP protocol, network access is more direct and convenient than previous wireless data networks (clusters, two-way paging, GSM short messages).
Third, the network reliability is high. First of all, there is a large redundant device and channel; secondly equipment is reused; again, once the base station is damaged, the mobile company is repaired very timely.
Fourth, the stability is good, on the one hand, the ability to resist natural interference is strong; on the other hand, the frequency band is dedicated, and it will not be subject to human interference. GPRS is best supported frequent, a small amount of burst data services. Communication quality is stable and reliable, never dropped.
5. GPRS tariff is inexpensive, and the bill is reasonable. GPRS tariffs are not cheap than cable network tariffs. The streetlight monitoring data acquisition business does not have a large amount of information transmission, unnecessary line (DDN, frame relay) with high tariffs (DDN, and Frame relay). GPRS can also be charged based on the amount of communication provided by the communication. In the GPRS network, users only need to connect to the network, keep this connection for a long time, and only occupy channels and billing only when transmitting data, and not occupying the channel. In this way, the business point is not to establish a connection frequently, and the cost is not required to pay the gate. GPRS is a new technique in the mobile communication network, completes the wireless Internet access, and this technique is transmitted (TCP / IP) transmission when data transfer, and provides a transparent channel. Network capacity is only assigned when needed. Once the packet completes the send task, the channel capacity is immediately released, so that instant connection and efficiency transmission are provided, real-time online features. Therefore, it is an economical efficient grouping data technology.
For the network, main station and slave equipment can be used
IP
And fixed
IP
Two working methods, when constituting small-scale monitoring nets, the master station and slave station use dynamics
IP
Way, use the dynamic domain name to use the public network to save costs (no need to rent
DDN
When equipped with a large network, the host can be fixed
IP
And use the private network to improve the efficiency of the system, but can still be used when conditions do not have
IP
And public network, this time efficiency is only fixed
IP
low
0.2%
.
