Cisco ASR 5000 Series Administration Manual page 30

▀ How HNB-GW Works
Figure 6.
R e l-8 U E
R R C C o n n e ctio n E sta b lish m e n t
R R C In itia l D ire ct Tra n sfe r
1 0
1. Upon camping on the HNB, the UE initiates an initial NAS procedure (e.g. LU Procedure) by establishing an
RRC connection with the HNB. UE capabilities are reported to the HNB as part of the RRC Connection
establishment procedure.
2. The UE then transmits a RRC Initial Direct Transfer message carrying the initial NAS message (e.g. Location
Updating Request message) with identity (IMSI or TMSI).
3. The HNB checks UE capabilities provided in step 1, if these indicate that CSG is supported and if the identity of
the UE (provided during RRC Connection Establishment) is unknown at the HNB being accessed, i.e. no
▄ Cisco ASR 5000 Series 3G Home NodeB Gateway Administration Guide
UE Registration Call Flow of CSG UEs and CSG or Hybrid HNBs
H N B
1
(L U R e q u e st e tc .)
C h e ck R e le a se , U E
3
C a p a b ilitie s
6
C o n tin u e w ith N A S P ro ce d u re to w a rd s C N th ro u g h H N B a n d H N B -G W
H N B -G W
2
U E R e g istra tio n R e q
(IM S I, U E R e l, U E C a p e tc .)
A cce ss C o n tro l
5
(A lw a ys A cce p t )
U E R e g istra tio n A cce p t
(C o n te xt id e tc .)
C o n n e ct
(In itia l U E M e ssa g e , C S G id )
9
O p tio n a l M o b ility M a n a g e m e n t
P ro ce d u re
1 2
HNB Gateway in UMTS Network
C N (C S /P S )
4
7
S C C P C o n n R e q
(In itia l U E M e ssa g e , C S G id )
S C C P C o n n e ctio n C o n firm
A cce ss C o n tro l
11
(A lw a ys A cce p t )
8
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