Reference Manual

Common Control Channel Handling
50 ms are discarded. Stored messages are transferred in the same order
as they arrive from MS.
Emergency calls have precedence over temporarily stored messages.
Each accepted CHANNEL_REQUEST is reported to BSC as a
CHANNEL_REQUIRED message according to /GSM:08.58:8.5.3/.
16.3 Operational Conditions
16.3.1 Paging
The number of paging groups supported by the RBS is dependent on
the channel combination:
•
(iv) The use of 16-81 paging groups is supported
•
(v) The use of 4-27 paging groups is supported
The paging queue length varies between 6 and 14 depending on the
number of paging queues in use. The length is calculated as:
Length = 14 - (PQMax/10) ; where PQMax = the highest paging group/
queue in use.
16.3.2 Immediate Assign
Max. number of elements in the IA queue = 10 and in the IAR queue =
10, in the IAPGQ = 3 and in the IRPGQ = 4.
16.3.3 CCCH Dequeuing and Transmission
A number of stacks are used for message retransmission:
•
One IA stack, number of elements = 4
•
Paging stacks (one stack/paging queue), number of elements/stack
=4
•
IAPGSs, number of elements = 3
16.3.4 Channel Request by MS
The RBS can receive and perform acceptance checks, corresponding to
full RACH capacity. The RBS can report accepted channel requests, as
CHANNEL_REQUIRED messages, corresponding to 37 % of the
requests on full RACH load.
EN/LZT 720 0008 R1A
2001-06-26
173 (421)
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