1. Notes on 802.11-TGu liaison November 2005 Date: 2005-11-14 Authors:
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Stefano M. Faccin, Nokia

2. November 2005
Abstract
This document contains the IEEE – 3GPP2 liaison report for November 2005.
Stefano M. Faccin, Nokia

3. November 2005
Status of Liaison
Liaison letter sent from to 3GPP2 after September meeting
Liaison presented and discussed at 3GPP2 October meeting
Presentation of u-tgu-requirements, in
TSG-X “Core Networks” 3GPP2 TSG-X ERA (Evolution, Requirements and Architecture), jointly with
TSG-S “Services and Systems Aspects”
Stefano M. Faccin, Nokia

4. 3GPP2 Activities related to IEEE 802.11: TSG-S
November 2005
3GPP2 Activities related to IEEE : TSG-S
Stage-1 Requirements (S.R0087-0) published August 04
Four main scenarios supported:
Scenario 1: Common billing & Customer Care
Scenario 2: Common authentication & WLAN Direct IP Access
Focus on 802.1X authentication with EAP-TLS; EAP-AKA
Access to IP connectivity, not 3GPP2 services
Scenario 3: WLAN 3GPP2 IP Access
Authentication/authorization/accounting based on 3GPP2 Home System
Access to the 3GPP2 Home System packet data services
Scenario 4: Session Continuity
continuity of a packet data session while switching of network connection takes places between the available access systems (e.g. WLAN-3GPP2)
Stefano M. Faccin, Nokia

5. 3GPP2 Activities related to IEEE 802.11: TSG-X
November 2005
3GPP2 Activities related to IEEE : TSG-X
Stage-2/3 Specification Phase I (X.P0028-0) completed (3Q04). Not published yet.
Supports scenarios 1 and 2
Stage-2/3 Specification Phase II (X.P0028-A)
Planned to support scenarios 3 and 4
Stefano M. Faccin, Nokia

6. TSG-S/TSG-X Main Feedback
November 2005
TSG-S/TSG-X Main Feedback
Main comment is that 3GPP2 has been developing the 3GPP2-WLAN interworking assuming that is a black box and no enhancements/changes are possible
3GPP2 indicated that further study of the requirements will take place, and comments will be provided to
3GPP2 also indicated that for scenarios currently developed for the IW the work in TGu is most probably not relevant due to the timelines for TGu
However, for longer term aspects of the IW, TGu work can provide valid tools to 3GPP2
3GPP2 suggested to look at current 3GPP2-WLAN IW documents, even if it was reminded them that the documents had been studied to create TGu requirements
Stefano M. Faccin, Nokia

7. TSG-C SWG1.4 MMSS Ad-Hoc Group focus is on system selection aspects
November 2005
TSG-C SWG1.4 MMSS Ad-Hoc
Group focus is on system selection aspects
Currently discussing network selection proposals
Presentation on created some stir since current proposals are either based on:
Draft-adrangi, being however deprecated, or
cdma-specific L2 solutions
is now offering an open-standard solution, several parties interested to discuss further
Both L2 L3 raised the group interest
“interesting” questions: see appendix
Stefano M. Faccin, Nokia

8. Discussion Items Network selection Authentication Comment:
November 2005
Discussion Items
Network selection
Need to understand more about solution space  we should keep them posted on proposals and ideas
Questions: do we want to post them the proposals as soon as they come up and get feedback?
Authentication
Not clear on authentication to multiple SSPNs through a single AP
Not sure of relevance for 3GPP2
Comment:
There seem to be some difficulty in gauging the type, extent, and impact of the MAC enhancements corresponding to the TGu requirements
Stefano M. Faccin, Nokia

9. Way Forward (A Suggestion to TGu)
November 2005
Way Forward (A Suggestion to TGu)
We need to keep “educating” 3GPP2 on the type of enhancements being defined
E.g. describing types of proposals being submitted
in order to create awareness of type, extent, and impact of the MAC enhancements corresponding to the TGu requirements
Final goal is to generate “practical” feedback from 3GPP2 that can be used by TGu to ensure TGu solutions are relevant for and welcome by 3GPP2
Stefano M. Faccin, Nokia

10. November 2005
Appendix
Stefano M. Faccin, Nokia

11. Interesting Questions
November 2005
Interesting Questions
In order of “interest”
“Why don’t you just use AAA … ? Just extend EAP!”
I had been expecting this …
“No need for a new solution, STUN solves the problems.”
Almost fell off the chair!
But the award goes to …
Stefano M. Faccin, Nokia

12. Interesting Questions
November 2005
Interesting Questions
“Why does IEEE want to mingle with 3GPP2 where you don’t belong?”
No respectable answer could be found.
Stefano M. Faccin, Nokia