AIS(Automatic Identification system)

I am looking for expert in AIS(Automatic Identification System) [login to view URL] I have over 80 greenhouses and installed 10 sensors in each rooms(So, total sensor numbers are over 800) Temperature and humidity, gas sensors , etc .. The measurement values from each sensors are transmitted via wireless transceiver. The wireless transceiver is connected to PC via RS232 port and send measurement data to PC. PC is installed in each greenhouses. The wireless transceiver is already built. There is a micro controller(PIC series) in the wireless transceiver. - My requirements are as following. 1 - I am going to build wireless communication system for my greenhouses. 2 - All measurement data is transmitted via wireless in run time. 3 - I want to see measurement data in any other greenhouses when I am in any greenhouses. Of course, the measurement data in all greenhouses must be shown on PC. 4 - I want to use TDMA(Time-division multiple access). [login to view URL] 5 - If you have TDMA program for AIS, I want to discuss about it in detail.