1. 3GPP WLAN Interworking update
May 2003
doc.: IEEE /229r1
March 2004
3GPP WLAN Interworking update
Cheng Hong, Panasonic
Osok Song, Samsung Electronics
(WNG-SC)
Date : 16th March 2004
Cheng Hong, Osok Song
Tan Pek-Yew, Matsushita Electric Ind.

2. Overview of relevant activities in 3GPP
March 2004
Overview of relevant activities in 3GPP
Stage 1 (Requirement)
SA1: TS (Expected to be approved this month)
Stage 2 (Architecture)
SA2: TS (Expected to be approved this month)
Stage 3 (Protocol)
CN1: TS (Protocol between mobile node and core network)
CN4: TS (Protocol inside core network)
SA3: TS (Security protocol)
Cheng Hong, Osok Song

3. March 2004
Time Plan
Security protocols (SA3) TS
Stage 3 protocols (CN1,4)
TS , TS
Specification of Architecture (SA2) TS
Feasibility Study (SA1) TR
Requirements (SA1) TS
2001
2002
2003
2004 6 1 6 1 6 1 6 12
Cheng Hong, Osok Song

4. Scenarios Phased approach
March 2004
Scenarios
Phased approach
Scenario 1: Common Billing and Customer Care
Scenario 2: 3GPP System based Access Control and Charging
Scenario 3: Access to 3GPP System PS based Services
Scenario 4: Service Continuity
Scenario 5: Seamless Services
Scenario 6: Access to 3GPP System CS based Services
In Release 6, Scenario 2 and 3 (partially) are supported.
Cheng Hong, Osok Song

5. Status of WLAN group in SA2
March 2004
Status of WLAN group in SA2 TS
Defining architecture for 3G/WLAN interworking
Only for scenario 2 and 3 for this release.
Current version is v2.5.0
Expected to be approved this month as v6.0.0
Freezing TS is scheduled to be June 2004 (Two more meetings before freezing).
Cheng Hong, Osok Song

6. 3GPP WLAN Interworking Arch.
March 2004
3GPP WLAN Interworking Arch.
Cheng Hong, Osok Song

7. March 2004
Status of SA3/CN1/CN4
They are currently working on scenario 2 due to instability of stage 2 work for scenario 3.
SA3
AAA mechanism (EAP-AKA, EAP-SIM)
Confidentiality and Integrity mechanism
CN1
Network selection
CN4
AAA protocols between core network entities
They are expected to finish stage 3 works (including scenario 3 works) by end of this year.
Cheng Hong, Osok Song

8. Open issues related to IEEE 802.11 Group
March 2004
Open issues related to IEEE Group
The network selection
Use of specific SSID format for interworking
EAP based network selection
Traffic (policy) and QoS enforcement in WLAN
Use of VLAN in scenario 3
What are the impact on WLAN now?
Can it be mandatory? i.e. supported at every MT, AP
Can necessary QoS be provided with VLAN?
Roaming supported?
Cheng Hong, Osok Song

9. Description of network selection problem
March 2004
Description of network selection problem
Cheng Hong, Osok Song

10. March 2004
Future Plan at 3GPP
3GPP will start to discuss scenario 4 (vertical handover between 3G access network and WLAN) from the second half this year.
Mobility support of WLAN by IEEE Group is essential.
Cheng Hong, Osok Song

11. Conclusions Next step for WIEN
March 2004
Conclusions
Next step for WIEN
Scope the group’s work and map the open issues from 3GPP to IEEE802.11
Verifying consistency with the existing IEEE solutions
Is the 3GPP TS precludes any IEEE solutions (/in development)?
?? Develop solution
Cheng Hong, Osok Song