Abstract: The present invention discloses a method for counting objects within defined area, using tag transceivers attached to each object and interrogating transmitters scattered at different places within the defined area. Each counting cycle is differentiated and identified and the tags avoid responding duplicate interrogation counting requests of the same identified counting cycle. The present invention improves the counting cycle by controlling data traffic transmission by dynamically changing the tags transmission probability parameter as a function of overall uncounted number of tags at each interrogation session. The present invention discloses a new transmission protocol for collisions' identification. Such protocol applies any modulating technique for the transmitted messages header, wherein the response transmissions are synchronized and include identical headers for identifying all received signals including corrupted signals.