More “what is 802.11u?” Date: 2006-03-08 Authors: March 2006 doc.: IEEE 802.11-06/0375r0 March 2006 More “what is 802.11u?” Date: 2006-03-08 Authors: Notice: This document has been prepared to assist IEEE 802.11. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.11. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures <http:// ieee802.org/guides/bylaws/sb-bylaws.pdf>, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair <stuart.kerry@philips.com> as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at <patcom@ieee.org>. Mike Moreton & Stephen McCann Mike Moreton & Stephen McCann

March 2006 doc.: IEEE 802.11-06/0375r0 March 2006 Abstract This document gives a longer personal overview of the aims of TGu and is an extension of an earlier presentation in WNG. As we’re still at the “call for proposals” stage, we can’t be explicit about how these aims will be achieved. Mike Moreton & Stephen McCann Mike Moreton & Stephen McCann

March 2006 doc.: IEEE 802.11-06/0375r0 March 2006 Why this presentation ? Many people do not understand what TGu is trying to achieve. TGu assists the advertising and connection to remote services beyond the DS. TGu provides information to the STA about the external network prior to association. Mike Moreton & Stephen McCann Mike Moreton & Stephen McCann

March 2006 doc.: IEEE 802.11-06/0375r0 March 2006 A User Perspective Thursday 2nd March, Charles de Gaulle (Paris) airport (Terminal 2F) Five broadcast SSIDs: WIFI-PRO HUBTELECOM ADPTELECOM Wireless 28CRDSG2FO103 Which one to choose? Mike Moreton & Stephen McCann Mike Moreton & Stephen McCann

A User Perspective With TGu you’ll know March 2006 doc.: IEEE 802.11-06/0375r0 March 2006 A User Perspective With TGu you’ll know which networks provide free service, which networks you can use based on your home subscriptions which networks you could enrol with which networks don’t provide any public service (so you can’t use them) TGu provides a “virtual point of presence” for many different networks through a single AP. Mike Moreton & Stephen McCann Mike Moreton & Stephen McCann

March 2006 doc.: IEEE 802.11-06/0375r0 March 2006 802.11u in a Nutshell IEEE 802.11 currently assumes that you are pre-authorised to use the IEEE 802.11 network When you come to connect, you already have all the security credentials you need (if any) TGu considers the case when you don’t You could enrol with the network (e.g. Wi-Fi’s UAM) You could use the network to get access to one that you do have credentials for Hot spot roaming Enterprise Virtual Networks You could find a network that is advertising it will give you the service you need without credentials “Free” services Emergency call (E911) support Local information services that don’t provide general Internet access Mike Moreton & Stephen McCann Mike Moreton & Stephen McCann

March 2006 doc.: IEEE 802.11-06/0375r0 March 2006 TGu – Why Bother? Question: Hotspots exist, roaming agreements exist, so why do we need TGu? Some existing solutions assume no MAC layer changes But can be klunky, inefficient and unscalable as a result Some existing solutions assume proprietary MAC extensions E.g. multiple SSIDs in a Beacon or Probe Response But these are non-standard, and hence risky and often will not scale to larger networks. Some existing solutions use layer 3 and above (i.e. IP family) techniques to overcome problems Assume trusted relationship between AP and network Problems with scalability and inefficiency No layer 2 fast roaming (TGr) TGu exists to “do it right” Stop hacking, and fix the problems properly Do the bits that have to be done at L2, and leave the rest to others Mike Moreton & Stephen McCann Mike Moreton & Stephen McCann

March 2006 doc.: IEEE 802.11-06/0375r0 March 2006 TGu scope Creation of a requirements document, has allowed the original PAR scope to be narrowed and clarified Requirements document defines key clusters (objectives) which members wish to work on Requirements reviewed by external liaison 11 liaisons sent out in September 2005 3GPP, 3GPP2, IETF, Wi-Fi Alliance, GSMA, FMCA etc 4 liaisons responses, acted upon in January 2006 Changed requirements document Scenarios document : 11-05-355r7 Requirements document : 11-05-822r9 Mike Moreton & Stephen McCann Mike Moreton & Stephen McCann

Clusters (Objectives) March 2006 doc.: IEEE 802.11-06/0375r0 March 2006 Clusters (Objectives) Network Selection Emergency Calls Online Enrolment User Plane Protection SSPN Interface MIH (IEEE 802.21 support) Authentication (optional) Mandatory (battery, security, legacy) Mike Moreton & Stephen McCann Mike Moreton & Stephen McCann

Down Selection Process (part II) March 2006 doc.: IEEE 802.11-06/0375r0 March 2006 Down Selection Process (part II) For each cluster: Step 4: Initial Presentation of Proposal Step 11: Internal Review Mergers? Y Step 5: Carry out mergers etc. N Step 12: Vote on whether to forward to WG Step 6: Discard Unmerged Proposals (partial) Step 10: Combine Cluster Proposals >1 Proposal? Y Step 7: Elimination Procedure >75%? N Step 9: includes getting comments from no voters etc. Step 10: can start once one or more clusters have been addressed (i.e. a single solution for a particular cluster has been selected and confirmed). Step 11: includes checking all mandatory requirements have been met. Start of each meeting it might be nice to confirm the latest draft document produced by editor, plus have a confirmation vote to approve the latest draft. N Step 8: Confirmation Vote Y Step 13: Forward to WG for LB <75%? Y Step 9: No Vote Resolution N Mike Moreton & Stephen McCann Mike Moreton & Stephen McCann

Clusters - backup Network Selection Emergency Calls March 2006 doc.: IEEE 802.11-06/0375r0 March 2006 Clusters - backup Network Selection Advertisement of external network capabilities prior to association. This includes discovery of appropriate roaming relationships prior to association with the network to prevent users having to select networks on a trial and error basis. The additional information can be used to support more sophisticated network selection algorithms in user devices and make selection of hotspot services more user friendly. Emergency Calls Support of emergency calls through advertisement of capability and refined admission control This is intended to enable emergency call service support in any hotspot where regulations indicate that it is needed. The main issue is to provide access to the emergency services when the user has no credentials with which to gain access to the access network. Mike Moreton & Stephen McCann Mike Moreton & Stephen McCann

Clusters - backup Online Enrolment User Plane Protection March 2006 doc.: IEEE 802.11-06/0375r0 March 2006 Clusters - backup Online Enrolment Assistance with enrolment in a foreign hotspot User Plane Provide consistent user experience for interworking service across different deployments and manage segregation of traffic associated with different service providers Protection Ability to protect user identity as they move between different public hotspots SSPN Interface Support for application of operator policy to subscriber traffic in the hotspot MIH (IEEE 802.21 support) Support of the IEEE 802.21 Media Independent Handover capability for 802.11 technology Authentication (optional) Ability to authenticate with various providers simultaneously. This is intended to support scenarios where users may wish to access services provided by different service providers simultaneously using different subscriptions. Mike Moreton & Stephen McCann Mike Moreton & Stephen McCann