Cisco ASR 5000 Series Administration Manual page 43

MME in LTE/SAE Wireless Data Services
Figure 7. Subscriber Registration Setup Message Flow
R a n d o m A cce ss
p ro ce d u re
A tta ch R e q u e st
2
(u se r id e n tity )
A u th e n tica tio n A K A p ro ce d u re
R B _ E st-R e q u e st
1 4
(A tta ch A cce p t)
R B _ E st-R e sp
(A tta ch C o m p le te t )
1 7
1. UE and eNodeB performs Random Access procedure.
2. After Random Access procedure completion, UE sends Attach Request with user identity to eNodeB.
3. The eNodeB forwards the Attach Request to MME
4. MME starts Authentication procedure with eNodeB and UE.
5. Once UE get authenticated MS sends Update Location Request to HSS with user IMSI derived during
Authentication procedure.
6. Once user get validated at HSS with IMSI, HSS sends Insert Subscriber Data Request to MME providing
subscriber profile and service subscription information to MME.
7. MME sends Create Bearer Request to Serving Gateway.
8. The S-GW forwards the request to P-GW.
9. P-GW reserves the EPS bearer and sends Create Bearer Response to the S-GW and establishes the EPS bearer
with S-GW for this user.
10. Once S-GW receives the Create Bearer Response from P-GW it reserves the EPS bearer and sends Create Bearer
Response to the MME and establishes the EPS bearer with MME for this user.
OL-22987-01
M M E
e N o d e B
1
A tta ch R e q u e st
3
(u se r id e n tity )
U p d a te lo ca tio n
4
In se rt su b scrib e r d a ta
6
In se rt su b scrib e r
d a ta A ck
U p d a te lo ca tio n
8
9
A tta ch A cce p t
1 3
(n e w S -T M S I)
1 5
A tta ch C o m p le te
1 6
(In i C o n te xt S e tu p )
H S S
S e rvin g G W
5
(IM S I)
7
A ck
C re a te B e a re r R e q u e st
C re a te B e a re r R e sp o n se
1 2
1 7
Cisco ASR 5000 Series Mobility Management Entity Administration Guide ▄
P D N G W
C re a te B e a re r R e q u e st
1 0
C re a te B e a re r R e sp o n se
1 1
1 7
How MME Works ▀
E n te rp rise
In te rn e t
1 7
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