Reference Manual

Common Control Channel Handling
However, if more than one IA is sent in the same
IMMEDIATE_ASSIGNMENT_EXTENDED message on air interface,
the same number of IMMEDIATE_ASSIGNMENT_SENT messages
should be sent on Abis.
16.2.4 CCCH Dequeuing and Transmission
Downlink CCCH capacity is used for PAGING as well as for access
grant (IMMEDIATE ASSIGN).
The RBS supports:
•
Dequeuing and scheduling
• Packing of messages
• Selection of Page Mode
• Retransmission of messages
• Dummy paging
•
Transmission of system information 7, 8, 13, 16 and 17
Handling of Paging is covered in the section Paging above. Handling of
Immediate Assign is covered in section Immediate Assign above.
Supported Logical Channels /GSM:05.02:3.3.3/:
AGCH Access Grant Channel
PCH Paging Channel
Dequeuing and Scheduling
The RBS dequeues and transmits messages from the CCCH queue
system in the following order of priority, where a) has the highest
priority:
a) SYSTEM_INFORMATION
b) IMMEDIATE_ASSIGNMENT
•
/GSM:04.08:9.1.18/
•
/GSM:04.08:9.1.19/
c) IMMEDIATE_ASSIGNMENT_REJECT
• /GSM:04.08:9.1.20/
d) IMMEDIATE_ASSIGNMENT for Paging Group
e) IMMEDIATE_ASSIGNMENT_REJECT for Paging Group
f) PAGING_REQUEST
If no messages are queued for transmission:
• IMSIs, TMSIs and IAs stored for retransmission (see section
Retransmission of Messages below) are sent at the same priority
level as described above.
• If no messages are stored for retransmission, "Dummy Paging" is
used (see section Dummy Paging below).
EN/LZT 720 0008 R1A
2001-06-26
169 (421)
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