The data services include positioning, text messaging, telemetry, and data transfer. These applications require data interaction with the radio. The power on/off state of the radio must be controlled. The Radio Registration Protocol (RRS) provides a common registration service. This service can receive or cancel the radio registration application, store related data, and transmit data to the required client application system. Thus, all application client programs obtain online information of the radio through accessing the RRS server, thus saving wireless talkback channel resources.
Figure 6 Architecture for the RRS Protocol
As shown in Figure 6, the RRS is a protocol based on the UDP/IP. The radio sends registration information to the console in the control center when the radio is either powered on or off. The console then transfers the protocol data packet to the RRS server through the USB. The RRS server records the radio data after receiving the registration information.
The RRS contains the following two basic protocols.
When the radio is powered on, it sends the On-Line Registration Protocol to the RRS server, indicating that the radio has logged into the application system. The RRS server receives the registration information sent by the radio, and sends an ACK to the radio.
When the radio is powered off, it sends the Off-Line Registration Protocol to the RRS server, indicating that the radio has exited the application system. The RRS server receives the cancellation information sent by the radio, and sends an ACK to the radio.