Codan Radio P25 Training Guide - Manual (Page 81)

P25 RADIO SYSTEMS | TRAINING GUIDE
Chapter 6: P25 Trunking Page 73
REGISTRATION
The subscriber unit (mobile or portable radio unit) registers with the network whenever the subscriber
is turned on or moves into a new zone. Registration ensures that only authorized users access the
network, and that the network can track where the subscriber is located.
There are two types of registration in a P25 trunked network, a full registration and a location registration.
A full registration will check the validity of the subscriber and will occur when the subscriber is fi rst
switched on, enters a new registration area, the user selects a new network or when the RFSS requests
registration. A location registration occurs when the subscriber has moved to another site within the
coverage area.
Figure 6-2 below shows an example of a P25 trunked system infrastructure confi guration. The
registration area is defi ned as a System and the Location Registration Area may be defi ned as one or
more sites within the RFSS.
Figure 6-2: P25 Trunking System Infrastructure
WIDE AREA
COMMUNICATION NETWORK
WACN ID 1
TRUNKING NETWORK INFRASTRUCTURE CONFIGURATION
RF
SUB-SYSTEM
RFSS ID 1
SYSTEM ID 1 SYSTEM ID 2
SITE ID 1 SITE ID 2
RF
SUB-SYSTEM
RFSS ID 2
SITE ID 3
INTER SUBSYSTEM INTERFACE (ISSI)
LOCAL REGISTRATION AREA (LRA)*
RF
SUB-SYSTEM
RFSS ID 3
SITE ID 4
REGISTRATION AREA (RA)
LOCAL REGISTRATION AREA
(LRA)*
*LOCAL REGISTRATION AREAS ARE
DEFINED BY ADMINISTRATOR