Remote LED display wireless information publishing system

Time:2018-10-22 Views:1265

An overview,

The information input of traditional LED display screen can only be done through direct connection of data cable and computer, which cannot meet the need of remote real-time information release.The wireless information release system of led display can effectively solve the problem of remote networking of led display.Based on GPRS wireless network technology, the system provides universal LED communication control interface to realize large-scale networking of LED displays.No matter where the LED display is placed, the main control center of the system can publish information accurately and instantaneously to one or more LED screens specified, greatly enhancing the flexibility of LED display to publish information.

2. LED display wireless information publishing system network topology

The wireless LED display information release system consists of LED display, LED display controller, F2103GPRSDTU and wireless LED display information release center platform.The control center publishes information through LED display software, takes GPRS network as the data transmission carrier, takes wireless data transmission unit and LED display controller as the access terminal of LED display screen, and realizes sending picture and text information from the control center to the remote wireless LED display equipment.

Iii. Features of wireless LED display information release system:

(1) large network size: the content of the traditional LED display screen is sent by the computer through the serial port data cable, and the number of the display screen is limited in size.The wireless LED display information release system sends the information through xiamen four letter GPRSDTU, which adopts TCP/IP network transmission protocol, and the number of terminal networking is not limited.

(2) real-time information release: the traditional LED display can only display the information stored in the controller fixedly, and the new information can only be updated through the computer online if it is needed.Wireless LED display can receive information sent by the information center at any time.

(3) no distance restriction: the traditional electronic display can only be used within a short distance, usually only tens of meters. The wireless LED display can be used across the country as long as the area covered by the wireless GPRS network is available, free from distance and location restrictions.

(4) easy installation and maintenance: as there is no need to lay optical cable or communication cable, the installation position of wireless LED display is easy to choose.The product adopts modular design for easy maintenance and repair.

Iv. Design principles of wireless LED display information release system

1.Advanced: make full use of advanced technologies such as computer Internet, mobile wireless communication system and LED display control, and design a domestic advanced wireless LED display information release system.Adopting the current advanced system software platform and terminal equipment, it can not only support the wireless LED display information network publishing needs, but also support the specific business needs of various industries.

2.Reliability: wireless LED display terminal can work stably and reliably with low failure rate of hardware.Communication mechanism is reliable, and the use environment of wireless network communication has its characteristics of complexity. The system communication mechanism must guarantee the high efficiency and reliability of data transmission.

3.Extensibility: the system should have good expansibility. When the number of terminals is increased, the user scope is expanded and the system function is increased, the system can be upgraded smoothly and the investment is protected.

4.Practicability: the operation of the whole system aims at convenience, simplicity and efficiency, which not only fully reflects the characteristics of rapid response, but also facilitates the information processing and release of operators, and facilitates the management to timely understand various statistical information.

5.Confidentiality: strict permission management is implemented for the management of the system. Only the key with certain permission can access, monitor, implement corresponding management and control operations, so as to ensure the security and reliability of the system.

V. main functions and functions of wireless LED display information publishing system

1.The maximum number of wireless LED displays supported by the system is more than 10000.

2.Communication system support: wireless communication mode such as GPRS/CDMA, short message communication mode;

3.The system software adopts B/S structure;

4.Support LED display device information management function;

5.Support text information real-time transmission, timing transmission;

6.The function of adding, deleting and editing the published information;

7.Define different operation users have different operation rights, and realize user hierarchical management.

Business process

The flow of GPRS private network system terminal to log on to the server platform is as follows:

1) the user issues the GPRS login request, including the special network APN specially assigned by the mobile company for the GPRS private network system;

2) according to the APN in the request, SGSN issues a query request to the DNS server, finds the GGSN connected to the enterprise server platform, and sends the user request to GGSN via the GTP tunnel package;

3) GGSN sends user authentication information (including mobile phone number, user account and password, etc.) to Radius for authentication through special line;

4) the authentication server sees authentication information such as mobile phone number, confirms that it is the request sent by the legitimate user, and assigns the user address to the DHCP server;

5) after passing the authentication of Radius, Radius sends the confirmation information of carrying user address to GGSN;

6) if the user gets the IP address, he can carry the data packet and access the information query and business processing platform of GPRS special network system.