Registration – Codan Radio P25 Training Guide User Manual

Page 81

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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

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