LED display of remote wireless information dissemination system works

Time:2018-11-28 Views:134

An overview,

Traditional LED screen information input can only be directly connected to the computer through a data line, which can not meet the needs of real-time remote information release.LED display wireless information release system can effectively solve the problem of remote networking LED display.Based on GPRS wireless network technology, the system provides a universal LED communication control interface to realize large-scale networking of LED display screen.No matter where the LED screen is placed, the main control center of the system can release information accurately and instantly to one or more specified LED screens, greatly enhancing the flexibility of information release of LED screens.

Ii. LED display wireless information publishing system network topology

Wireless LED display information release system consists of LED display, LED display controller, F2103 GPRS DTU and wireless LED display information release center platform.The control center USES LED display information publishing 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 remote transmission of image and text information from the control center to remote wireless LED display equipment.

Iii. Features of wireless LED display information release system:

(1) large networking scale: the content of traditional LED display screen is sent by the computer through serial port data line, and the number of display screen is limited in scale.Wireless LED display information release system sends information through a variety of current GPRS control system, using TCP/IP network transmission protocol, the number of terminal networking is not limited.

(2) real-time information release: traditional LED screen can only display the information stored in the controller fixedly. If new information needs to be released, the information can only be updated online by the computer.Wireless LED display can receive information from the information center at any time.

(3) not limited by distance: traditional electronic display screen can only be used within a short distance, generally only a few tens of meters, wireless LED display screen in the national scope, as long as the wireless GPRS network coverage can be used, not limited by distance and location.

(4) easy installation and maintenance: since there is no need to lay optical cable or communication cable, the installation location of wireless LED display screen is easy to choose.Modular design is adopted to facilitate maintenance and repair.

Iv. Design principles of wireless LED display information release system

1.Advanced: make full use of computer Internet, mobile wireless communication system, LED display control and other advanced technology, design has the domestic advanced wireless LED display information release system.The use of the current advanced system software platform and terminal equipment, not only can support wireless LED display information network release needs, but also can support the specific business needs of various industries.

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

3.Expansibility: the system should have good expansibility. When the number of terminals increases, the user range expands and the system function increases, the system can be upgraded smoothly and the investment can be protected.

4.Practicality: 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 the timely understanding of various statistical information by the management.

5.Confidentiality: strict authority management is implemented for the management of the system. Only keys with certain authority can be accessed, monitored, and corresponding management and control operations implemented to ensure the safety and reliability of the system.

5. Main functions of wireless LED display information release system

1.The maximum number of wireless LED screens supported by the system is more than 10,000;

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

3.The system software adopts B/S structure;

4.Support LED display device information management function;

5.Support real-time and regular sending of text information;

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

7.Define different operation users have different operation permissions to achieve hierarchical management of users.

Vi. Business process

The process of GPRS private network system terminal accessing the server platform online is as follows:

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

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

3) GGSN sends user authentication information (including mobile phone number, user account, password, etc.) to Radius via a dedicated line for authentication;

4) Radius authentication server sees authentication information such as mobile phone number, confirms that the request is from legitimate users, and requests to assign user address to DHCP server;

5) after passing Radius authentication, Radius sends GGSN confirmation information with user address;

6) when the user gets the IP address, he/she can carry the packet and access the GPRS private network system information query and business processing platform.