802 Handoff ECSG Overview for Joint 16e/Handoff

1. 802 Handoff ECSGOverview for Joint 16e/Handoff David Johnston david.johnston@ieee.org dj.johnston@intel.com David Johnston, Intel

2. Purpose • Explain what has been done in 802 Handoff • Understand areas of possible intersection with 802.16e • Make sure we aren’t heading for a train wreck! David Johnston, Intel

3. Problems We Are Addressing • You don’t know what you attached to when you associated/registered/plugged into a L2 network • Upper layers don’t know what is going on at L2 and so can’t make good handover decisions • There is no media independent way of asking for handover related information over a link. A conduit is needed. David Johnston, Intel

4. The Link Interface • A media independent protocol operating over 802 links • Get handover or network detection and selection information • Maybe act as conduit for event into • Maybe act as conduit for backhaul signalling • CUPE model being promoted • Controlled and Uncontrolled Port Entity David Johnston, Intel

5. 802.1x David Johnston, Intel

6. CUPE* Model*Controlled/Uncontrolled Port Model David Johnston, Intel

7. What about 802.1X in 802.16? • We build on the 802.1X to give us a conduit • Backhaul AAA schemes may mandate it • So be aware that it may infiltrate products regardless of the specification • Its only a conduit • So 802.16 can put in its own substitute conduit • We could do it in handoff as a recommended practice • Probably only a container frame for Handover IEs. David Johnston, Intel

8. Handover Information • Define a set of structured information that can be used to make handover decisions • Try to align with structured information from non 802 groups to allow effective interworking with them • IETF, 3GPP, 3GPP2 • Achieve levels of mapping • Structure equivalence – easy • Semantic equivalence – requires hard work • Encoding equivalence – next to impossible David Johnston, Intel

9. Triggers • An API or management interface or MIB or MAC service interface to: • L2 Triggers • An enabler for fast mobile IP • Advanced handover decision making • Trajectory • Location based • Preemptive handover preparation • Triggers not yet defined • Strong will to align triggers between the groups/IETF etc. David Johnston, Intel

10. Network Detection and Selection • Early discovery of access point properties • What’s going on at L3 – IP, DHCP, subnets etc • What’s going on at L2 – VLAN, 1X • What auth services are required/supported • Neighbor, channel, location information • QoS capabilities/capacities • Improve scanning efficiency • Neighbor lists David Johnston, Intel

11. Network Detection and Selection • We are proposing means by which very early, non secured information can be accessed by mobile stations • Not so relevant for 802.16 • Longish attachment time • Other methods can substitute • Backhaul communication • Preemtive triggers • Pre authentication • Neighbour lists. David Johnston, Intel