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TR 23.829 (SA2) ★
Local IP Access
and Selected IP Traffic Offload
(LIPA-SIPTO)

use "3GPP‑Page" to get the Word version
for a better overview, the Table of Contents (ToC) is reproduced

V10.0.1 (Wzip) 2011/10 43 p.

Rapporteur: Mr. Hédé, Patrice

Support of Local IP access for the Home (e)NodeB Subsystem and of Selected IP traffic offload for the Home (e)NodeB Subsystem and for the macro layer network is required in TS 22.220 and TS 22.101. This TR describes the following functionalities:

Local IP access – LIPA – to residential/corporate local network for Home (e)NodeB Subsystem;
Selected IP traffic offload – SIPTO – (e.g. Internet traffic) for Home (e)NodeB Subsystem;
Selected IP traffic offload (e.g. Internet traffic, corporate traffic) for the macro network (3G and LTE only).

full Table of Contents for TR 23.829 Word version: 10.0.1

1 Scope Word-p. 6

3 Definitions, symbols and abbreviations

3.1 Definitions

3.2 Abbreviations Word-p. 7

4 Examples for Styles

4.1.1 LIPA scenarios

4.1.2 SIPTO scenarios

4.2 Key issues Word-p. 8

4.2.1 Legal interception

4.2.3 Single/multiple PDN support

4.2.4 Deployed behind NAT

4.2.5 Operator control for SIPTO

4.3 Architectural requirements Word-p. 9

5 Architecture solutions

5.1 Architectural principles

5.2 Solution 1 - Local IP Access and Selected IP Traffic Offload solution based on traffic breakout performed within H(e)NodeB using a local PDN connection Word-p. 10

5.2.1 Applicability

5.2.2 Architectural principles

5.2.2.1 General principles

5.2.2.2 Architectural functions Word-p. 11

5.2.2.2.2 SIPTO for H(e)NodeB Word-p. 12

5.2.2.3 Activation/Deactivation mechanism for LIPA and SIPTO

5.2.2.3.2 SIPTO

5.2.3 Architecture variants Word-p. 13

5.2.3.1 Architecture variant 1 for LIPA

5.2.3.1.1 General

5.2.3.1.2 LIPA PDN connection establishment Word-p. 14

5.2.3.1.3 Inter-HeNodeB mobility Word-p. 16

5.2.3.1.4 S1 Release procedure

5.2.3.1.5 UE Triggered Service Request procedure

5.2.3.1.6 L-GW Triggered Service Request procedure Word-p. 17

5.2.3.1.7 Standards impacts Word-p. 18

5.2.3.2 Architecture variant 2 for LIPA

5.2.3.2.1 General

5.2.3.2.2 LIPA Architecture for HeNodeB Word-p. 19

5.2.3.2.3 LIPA Architecture for HNB with S4-SGSN

5.2.3.2.4 L-GW functions Word-p. 20

5.2.3.3 Architecture for LIPA for UMTS

5.2.4 Open architectural issues Word-p. 21

5.2.5 Evaluation

5.3 Solution 2 - Local IP Access and Selected IP Traffic Offload at H(e)NodeB by NAT Word-p. 22

5.3.1 Applicability

5.3.2 Architectural principles

5.3.3 Paging and Mobility Support Word-p. 23

5.3.4 Architecture diagrams

5.3.5 Deployment requirement and limitations Word-p. 24

5.3.6 Standard Impacts

5.4 Solution 3 - GGSN allocation to offload point Word-p. 25

5.4.1 Applicability

5.4.2 Architectural principles

5.4.3 Location of breakout point Word-p. 26

5.4.2.1 RNC Breakout

5.4.2.2 HNB-GW Breakout

5.4.2.3 HNB Breakout

5.4.4 Mobility aspects of LIPA and SIPTO

5.5 Solution 4 - Selected IP Traffic Offload at Iu-PS

5.5.1 Applicability

5.5.2 Architectural principles Word-p. 27

5.5.3 Traffic Offload Function

5.5.4 Offload procedure Word-p. 28

5.5.5 Impacts on specification Word-p. 29

5.6 Solution 5 - Selected IP Traffic Offload solution based on local PDN GW selection

5.6.1 Applicability

5.6.2 Architectural principles

5.6.3 Architecture Diagrams Word-p. 30

5.6.4 Standards impacts Word-p. 31

5.6.5 Open architectural issues Word-p. 32

5.7 Solution 6 - Local Gateway based Architecture

5.7.1 Applicability

5.7.2 Architectural principles

5.7.3 Open issues Word-p. 34

5.7.4 Establishment of PDN connectivity subject to LIPA or SIPTO

5.7.5 Terminating traffic handling Word-p. 36

6 Evaluation Word-p. 37

6.1 Evaluation of GW Selection mechanism

6.1.2 Scenario 1: GW close to the UE's point of attachment Word-p. 38

6.1.3 Scenario 2: GW co-located with HeNodeB or HNodeB Word-p. 39

6.2 Evaluation of GW re-selection mechanism for SIPTO

6.2.2 GW re-selection criterion

7 Conclusions Word-p. 40

7.1 Conclusion on SIPTO macro

7.2 Conclusion on LIPA

7.2.1 Conclusion on the LIPA architecture

7.2.2 Conclusion on the architecture for Rel-10

7.3 Conclusion on SIPTO in the Home (e)NodeB subsystem Word-p. 41

A Evaluation of methods for operator control of SIPTO traffic Word-p. 42

A.2 SIPTO traffic control granularity

A.3 Enforcement of SIPTO Routing Policies

B Change history Word-p. 43