LTE_EPC 网络结构及演进

In roaming case the PCRF is split into vPCRF and hPCRF with S9 interface
Soc Classification level 8 © Nokia Siemens Networks Presentation / Author / Date
Visited Operator Services
MME
Internet
Local Breakout allows traffic routing directly to visited service networks and internet
Soc Classification level 9 © Nokia Siemens Networks Presentation / Author / Date
Pre R8 2G/3G
P-CSCF w/SBC
BTS
BSC
Ia BG
R8 2G
S12 DT NodeB RNC Iu_c
PGW SGi
S4
SGi Internet
R8 3G
S11 uSGSN S1-U S3 S6a SGs MME
Control plane User plane
CNR
Operator services
RAN Evolved Packet Core
BSC
2G
Gb S16 SGSN S4
Gxc(*) Gx SGW PGW
PCRF
3G
NodeB
RNC Iu S12 S3
Rx+ SGi
S5
LTE
eNodeB
S1-U S1-MME MME S10 S11 Gr/S6d S6a
Operator Services Internet Corporate Services
PCRF MME
S1-MME eNodeB S11 SGW S5-GTP S10 S11 PGW SGi Gx
Rx+
LTE
S1-U S1-MME
Operator Services Internet
S6a
MME
Corporate Services
Basic EPS architecture defined in 3GPP TS 23.401 Includes the functionality for connectivity through E-UTRAN GTPv2 is C-Plane protocol in Core Network
HSS
S8b is the roaming variant of S5PMIP, and used when P-GW is at Home PLMN
S6a
Gxc interface is added since PMIP does not support QoS information delivery.
Control plane User plane
Nokia Siemens Networks EPC Solution
A-SBC BTS/NodeB BSC/RNC Gb Iu R7 DT 2G SGSN Gb Gn Gn Gx Gm S4 SGi S5 SGW SGSN PCRF Rx Mg/Mi MGCF Mn MGW IMS Core S/I-CSCF Mw
Evolved Packet System (EPS) Architecture Subsystems
• The EPS architecture goal is to optimize the system for packet data transfer. • There are no circuit switched components. The EPS architecture is made up of: – EPC: Evolved Packet Core, also referred as SAE – eUTRAN: Radio Access Network, also referred as LTE
Architecture with S4 interface is called also Common Core • GTPv2 control plane interfaces from MME and SGSN to Serving GW • EPS bearers in MME and SGSN (PDP context still in 2G/3G UE and RAN) Common Gateway • Use of S-GW as a 3GPP local anchor • Usage of P-GW as IP point of attachment • Roaming between S-GW and P-GW • Similar usage of QoS • Common policy control by PCRF Registers • Common register interface • MME/SGSN seen as a one element For optimized use the SGSN/MME can be implemented in the combined element • Combined SGSN/MME for all 3GPP accesses • Shared subscriber data • Intersystem mobility inside of element • Same feature set where applicable
EPS Architecture
LTE or eUTRAN SAE or EPC
• EPC provides access to
external packet IP networks and performs a number of CN related functions (e.g. QoS, security, mobility and terminal context management) for idle and active terminals • eUTRAN performs all radio interface related functions
PCRF Gx Rx+
Gb Iu
SGSN SGSN
S4 SGW S8a S3 PGW
3G/HSPA+
LTE
S12 S1-U S1-MME S11
SGi
Gr/S6d
Operator Services
Internet
Corporate Services
HSS
MME
ห้องสมุดไป่ตู้
S6a
Serving GW in the Visited PLMN and PDN GW at home PLMN S8a is the roaming variant of S5-GTP, and used when P-GW is at home PLMN
LTE/EPC Evolved Packet Core Workshop
Introduction to EPC & Architecture Evolution
Soc Classification level 1 © Nokia Siemens Networks
Presentation / Author / Date
Soc Classification level 3 © Nokia Siemens Networks Presentation / Author / Date
HSS
Control plane User plane
Non-roaming architecture for eUTRAN – S5(PMIP)
RAN
2G
VPLMN
vPCRF S9 Gb Iu SGSN Gxc S4 SGW S8b S3 S1-U
HPLMN
hPCRF Gx Rx+ PGW SGi
3G/HSPA+
LTE
S12
S1-MME
MME
S11
Gr/S6d
Operator Services
Internet
Corporate Services
HSS
* Needed only with S5 PMIP
Soc Classification level 5 © Nokia Siemens Networks Presentation / Author / Date
Control plane User plane
Non-roaming architecture for 3GPP accesses 2/2
MK u Control plane User plane
S5
Soc Classification level 11 © Nokia Siemens Networks
Control plane User plane
Roaming architecture for Local Breakout
HSS
hPCRF
HPLMN
Gr/S6d S6a S9
Gxc SGSN S4 SGW S5 SGi S3 S3 S11 PGW Gx Rx+ vPCRF
VPLMN
3GPP access
eUTRAN Evolved Packet Core
Gxc
PCRF
Gx
MME
S1-MME eNodeB
S11
SGW S5-PMIP
PGW SGi
Rx+
LTE
S1-U S1-MME S10 S11