Hytera DMR System Planner
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2.11.2 Positioning System
（
LP
）
The topological diagram of Hytera digital location service system is shown in figure
below. This system is comprised of three parts: 1) GPS, 2) radio network, and 3) PC.
Figure 2.11.2-1: Hytera Location System Diagram
In the location system, the GPS RX module in the radio receives GPS information
(including latitude, longitude, altitude, time, speed), providing basic location data
source for the system. Then the received location information is transmitted to the
Dispatcher Station in control center over the wireless air interface; finally to PC via
the USB cable. PC can communicate with any radio in the wireless radio network.
For example, it can request any radio in the system to send its location information.
There are two types of reporting: periodical reporting and single reporting. When the
radio is in an emergency, it can send its GPS information to PC, for the dispatcher to
arrange rescue according to the location.
The radio communicates with PC via the Hytera Location Protocol (LP); this protocol
allows the information to be transmitted in the radio network over the public air
interface, and between PC and the Dispatcher Station via the USB cable. The LP
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