Abstract: PDT(Professional Digital Trunking) standard protocol can not meet the requirement of large number of terminals reporting positioning data periodically in a specified short time. In order to solve this problem, an efficient positioning data reporting method based on group text short message pull-up and dedicated data channel reporting is proposed. Firstly, the cable dispatching terminal initiates the positioning data pull-up request, and then PDT system encapsulates the group text short message and sends it to target terminals. Finally, target terminals report the positioning data on the dedicated data channel in sequence. The effectiveness and feasibility of the method are proved by the experimental simulation.

Key words: professional digital trunking (PDT), positioning data reporting method, group text short message pull-up, dedicated data channel reporting