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3. 3
LTE / HSPA / EPC knowledge nuggets
Red Banana Wireless Ltd – Copyright 2013
Connecting to the IMS
www.red-banana.org
www.4g-seminar.com
R8 - Evolved Packet System
HSS
EPC
External networks
and services
LTE-UE
ENBE-UTRA
E-UTRAN
S-GW
MME
EPS
Service
Control
P-GW
(LTE)
4. 4
LTE / HSPA / EPC knowledge nuggets
Red Banana Wireless Ltd – Copyright 2013
Connecting to the IMS
www.red-banana.org
www.4g-seminar.com
LTE / EPC Basic Architecture
MME
P-GW
HSS
External Networks
and Services
User data
Control signalling
User Data and
Control signalling
LTE-Uu S1-U
S1-MME
S11
S6a
S5
Gxc Gx
SGi
Rx
X2 (C+U)
MME
S10
EPC
Other PLMN
S8
S-GW
PCRF
5. 5
LTE / HSPA / EPC knowledge nuggets
Red Banana Wireless Ltd – Copyright 2013
Connecting to the IMS
www.red-banana.org
www.4g-seminar.com
Combined General Architecture (R8)
HSS
External PS
Networks and
Services
Mc
Other PLMN
RNC
Uu
SGSN
MGW MGW
Nb
Gs
IuPS
IuCS
Iub
Gr/S6d
EIRF
Gf
D
GGSN
Gn
Gi
Gc
C
MSC
Server
MSC
Server
Nc
External CS
Networks and
Services
Mc
RNC
Iur
MME
P-GW
MME
S-GW
PCRF
Other
PCRF
Gxc
Rx
Gx Gx
S9
Um Abis
BSC
Gb A
A
SGi
LTE-Uu
S1-U
S1-MME
S11
S6a
S5
X2
S10
S8
S3
S13
S4
SGs
IuCS
Other PLMN
IMS
Platform
6. 6
LTE / HSPA / EPC knowledge nuggets
Red Banana Wireless Ltd – Copyright 2013
Connecting to the IMS
www.red-banana.org
www.4g-seminar.com
Connecting to IM CN (1)
MME
SGW PGW
HSS
1. Establish RBs
2. Register with CN &
request ‘PDN service’
3. Retrieve
Security and
subscription
parameters
4. Authenticate SIM
and secure connection
5. Accept
Registration
6. Update
location
information
7. Request
bearer
8. Request bearer and
tunnel establishment
PCRF
9. Establish QoS
and charging
rules
11. Forward
connection
details
12. Forward
connection
details
10. Establish bearer
and GTP tunnel
13. Modify RBs
P-CSCF
IMS
Platform
15. Register with
IMS
14. Establish GTP tunnel
7. 7
LTE / HSPA / EPC knowledge nuggets
Red Banana Wireless Ltd – Copyright 2013
Connecting to the IMS
www.red-banana.org
www.4g-seminar.com
Connecting to IM CN (2)
MME
SGW
HSS
(2. Register with CN &
request ‘PDN service’)
17. Request
bearer
18. Request bearer and
tunnel establishment
PCRF
19. Establish QoS
and charging rules
21. Forward
connection
details
22. Forward
connection
details
23. Modify RBs
P-CSCF
IMS
Platform
PDN
16. Request ‘IMS
service’
20. Establish bearer
and GTP tunnel
25. Register with
IMS
PGW
15. Connect to PDN
GTP tunnel
GTP tunnel
24. Establish GTP tunnel