The control system of LED display is divided into online system and offline system.The online system means the display can play the programmes in real time,like the live show,the football game,the video playing on the computer,and it"s very easy to change the contents on the display.To the contray ,the offline system is always used in advertisement or other field that it"s no need to change the contents frequently,it works without any signal lines,once the programs are sent into it,just turn on the power,it"ll show the contents,it"s very convenient to use,based on your ideas,it can be placed everywhere needed.
   In this project,the wireless control method would be the bet choice,Nowadays,as the wireless router is widely spread, the solution can be used in the LED control system,as the figure shown below;
   The display are connected with the wireless router,and users can use a laptop or desktop with the wireless network card to configurate these displays,if these displays are placed together,and the host computer is near the displays,this will be the very  facilitated to control,Also,if the displays are not that far from your working place,you can use a USB storage device or a SD card to update the programs in the display.
   There is another way to make the control distance more farther,that is through the GPRS or the GSM. The mobile network is very matural at the present,GPRS,GSM,3G,even the WIFI are all familiar to us,they exist everywhere around you,So it also can be applied to the LED display,through a GSM module,what the user need is just sent a short massage to the display.The GSM module has a RS232 or RS485 output,connect it with the common control system like lytec or ledok,and put a mobile card in the module,when the GSM module received a message,it will sent it to the control system through the serial port,and tell the system what kind of effect you want to add.This solution can be applied to the traffic VMS,or the scenario that many displays are used to the diffenrent places,and they"re very far from your working place.