Last updated: December 3, 2008
This section is only applicable to the lab applications.
Packet Broadcast Control Channel (PBCCH) is transmitted in all operating modes except CW and Cell Off when the PBCCH is enabled. When available, the PBCCH is the channel that is used by the mobile station, in place of the BCCH, for control information and signaling related to packet services.
PBCCH can only be enabled/disabled when operating mode is Cell Off.
When the PBCCH is activated, PSI1, PSI2, PSI13, PSI3bis, and PSI13qtr are transmitted on the new channel. When the PBCCH is on, it is generated in Timeslot 1 on the same ARFCN as the BCCH. The Neighbour Cell parameters are also transmitted on the PBCCH when it is activated (see Configuring the PBCCH BA Table ).
Once activated, the PBCCH may be used by the mobile station, in place of the BCCH, to Attach to the test set. You can see requests by the mobile station to Attach by observing the PRACH count indicator.
You can configure the PRACH length to be either 8 bits or 11 bits to test the mobile station's ability to properly encode the PRACH. The procedure to change the PRACH Length is included with the procedure to change the state of the PBCCH below.
This procedure describes how to change the state of the PBCCH.
Call Setup
screen.
Operating Mode
softkey (
F1
) and select
Cell Off
.
Cell Info
softkey (
F6
).
Cell Operation
softkey (
F1
) to open the Cell Operation menu.
PBCCH
to
On
.
PRACH
to
8
or
11
bits as desired.
Return
softkey (
F6
) to go back to the Call Setup screen.
Operating Mode
softkey (
F1
) and select
Active Cell
.To verify that the PBCCH is on, switch on the mobile station and verify that a PRACH is received during the attach procedure. The PRACH counter is on the Call Setup screen.