3gpp Umts Hnb Architectuure New

13GPP UMTS HNB

IMS Architectures

23GPP UTRAN Architectures

Uu is the air interface between a

Iub is the interface between the Node B base station and RNC

Iur is the interface between RNCs for the purpose of RNC handoff

IuPS is the data interface between the RNC and SGSN

IuCS is the voice interface between the RNC and MSC

RANAP is the control protocol common to both IuPS and IuCS

Mobile

Core

3GPP Home Node B (femto) Architecture

HNB

FemtoMS Uu

IuCS

IuPSHNB

GW

SGSN

MSC

Iuh =

Iu / IPSec

HNB femto is like a collapsed node B and RNC

Iuh is simply Iu (CS and PS) transported over IPSec

RANAP (Iu control protocol) is carried over lightweight encapsulation and relayed through HNB-GW

RTP CS traffic is simply relayed to IuCS side

GTP-U PS traffic is simply relayed to IuPS side

HNB-GW terminates IPSec, concentrates HNBs, and splits IuCS and IuPS

HNB-GW will be implemented in PDG/PDIF boxes from Airvana, Stoke, etc

Iu runs over SS7/SIGTRAN and ATM

Node B

(BTS)MS

Uu

IuCS

IuPS

RNC

SGSN

MSC

Iub

3GPP UTRAN ArchitectureMobile

Core

33GPP HNB Architecture (UMTS Release 8)

Iuh

RANAPHNBAP

RUA

SCTP

IP

MSC

HNB

SGSNInternet

References:

TS 25.413 v5.12.0 (2005-06), UTRAN Iu Interface RANAP Signalling (release 5)



Control Plane

RANAP

SCCP

SCTP

IP

M3UA

ATM

MTP

SSC

User Plane

Iu UP

GTP

ATM

UDP

IP

IuPS

IP/ATM/TDM

Core

Control Plane

RANAP

SCCP

SCTP

IP

M3UA

ATM

MTP

SSC

User Plane

Iu UP

AAL2

ATM

IuCS

HNB

GWIPSec PDG

L2

L2

4Internet UMTS PS Core

3GPP HNB IMS Architecture (UMTS release 9)

Variant 1: SIP UA in the HNB runs over Iuh (PS)

References:

3GPP S2 090383 S2 Iuh 70 Iuh-IMS-HNB-Architecture v2, 11/2008, NEC, SoftBank

3GPP S2-090382 S2 70 IMS HNB General Architecture v7, 11/2008, NEC, SoftBank

3GPP S2-090387 S2 70 IMS HNB with Local PBX v4; 11/2008, NEC, SoftBank, Starent, NTT DoCoMo

Iuh (GTP)

Iu PS

SIP/RTPSIP UA

IMS Core

SGSN

GGSN

X-CSCF

MGWADVANTAGE:

Smart SIP femto can do more home

features; e.g. PBX integration

PDGHNB

GWIPSec

SIP/RTPGi

IP VAS


Variant 2: SIP UA runs in the HNB-GW

References:



3GPP S2-090387 S2 70 IMS HNB with Local PBX v4; 11/2008, NEC, SoftBank, Starent, NTT DoCoMo

UMTS PS Core

IMS Core

Iu PS

SIP/RTP

SGSN

GGSN

X-CSCF

MGWADVANTAGE:

No change to Iuh femtos

Internet

Iuh

IPSec PDG HNB

GW

SIP UA

GiIP VAS

DISADVANTAGE:

PS Core overload with CS

traffic


Variant 3: SIP UA runs in the HNB-GW; direct Wu to IMS

References:

3GPP S2 090384 S2 70 Wu-IMS-HNB Architecture v4, 11/2008, NEC, SoftBank

3GPP S2 090385 S2 70 IMS HNB Architecture Comparison v2, 11/2008, NEC, SoftBank

UMTS PS Core

IMS Core

Iu PS

SIP/RTP

SGSN

GGSN

HNB

GW

X-CSCF

MGW

SIP UA

ADVANTAGE:

SIP/RTP traffic is offloaded

from PS core

Internet

Iuh

IPSec

References:



ADVANTAGE:

No change to Iuh femtos

GiIP VAS

PDG

7Internet


Variant 4: SIP UA in the HNB, no Iuh

SIP/RTP

Gi

SIP/RTP

SIP UA

IMS Core

X-CSCF

MGW

ADVANTAGE:

Smart SIP femto can do more home

features; e.g. PBX integration

No Iuh in femto

Wu

IPSec

ADVANTAGE:

No HNB-GW

UMTS PS Core

GGSNGi

IP VAS

PDG/

TTGGn

8Architecture Comparison

Flat Architecture (only HNB & HNB GW)

Direct IP interface (HGi) at HNB GW

Optimized backhaul (no unnecessary GTP-U protocol

overhead)

Additional HNB / HNB-GW interface needed

Supports PS Traffic Offload from SGSN/GGSN

PS Core Bypassed Through PS CoreSupports CS Traffic Offload

Wu+ based IMS HNB

Architecture

Iuh based IMS HNB

Architecture

References:





9Internet


CSRV Role

SIP/RTP

IMS Core

X-CSCF

IPSec

UMTS CS Core

HLR

PDG/

TTG/

HNB

MSC

SMS-C

MPC

CSRV

MGW

Regardless of IMS HNB architecture, CSRV

(Convergence Server) is required for Voice, SMS,

and Supplementary Services on par with macro

network

CSRV is a signaling-only box which looks like an

App Server in the IMS domain, and a VLR in the CS

core.

Consistent with CSRV (aka MFIF/TAS) in 3GPP2

architecture

SIP

(ISC)

GSM

MAP

10

Internet


IMS Centralized Services (ICS)

IMS Core

X-CSCF

IPSec

UMTS CS Core

HLR

PDG/

TTG/

HNB

MSC

SMS-C

SCC ASIMS centralized services utilizes

legacy mobile core for voice services

AND IMS for IMS services.

Requires MSC Server changes (SIP)

HNB / ICS architecture needs

investigation.

Unclear if/how CSRV would fit into

this architecture.

References:

3GPP TS 23.292 IP Multimedia

System (IMS) centralized services;

Stage 2

SIP

(ISC)

3gpp Umts Hnb Architectuure New

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