Problem with RF zig zag algorithm

Hai Every one.

I am working in the rf project,
Rf frequency - 433mhz,

When i connect one transmitter and receivier the transmission is going on properly, But when i connect more than one transmitter no data is receivied by the recivier,
What i want to do if i want to receive more transmitter data by a receiver ?

hi,

are you sure that both transmitters dont transmit at the same time. What is the error detection technique used

Yes, all the transmitter's will transmitt their data at same time.

Hi,

If all transmits data at the same time you would just receive corrupted data.What is your design aim?

Can any thing be done in the receivier side? because 20 transmitter will send data's
The time intervals are in seconds. so i cant change that.