doc.: IEEE /223r0 Submission March 2004 Eleanor Hepworth, Siemens Roke ManorSlide 1 Interworking Requirements Eleanor Hepworth Siemens Roke Manor

doc.: IEEE /223r0 Submission March 2004 Eleanor Hepworth, Siemens Roke ManorSlide 2 Overview Users/operators have requirements on hotspot behaviour –User: ease-of-use, low cost –Operator: control of user behaviour, flexible charging models, incremental deployment These requirements impact hotspot operation –May be necessary to support new features –Where and how should these be provided

doc.: IEEE /223r0 Submission March 2004 Eleanor Hepworth, Siemens Roke ManorSlide 3 User Scenario: New User Sign Up Hotspot New User AP Advertise New User Sign Up Operator AAA Server 1. Secure User Sign Up for limited time (e.g. providing credit card details) 2. Configure AP to disconnect user on subscription expiration 3. Disconnect User

doc.: IEEE /223r0 Submission March 2004 Eleanor Hepworth, Siemens Roke ManorSlide 4 Implications To support new user signup: –Secure anonymous access Co-existence of RSN and pre-RSN? –Advertisement of support for this capability –Transfer of operator disclaimer information? Limited network access: –Configuration of authorisation policy within AP –Graceful disconnect of users

doc.: IEEE /223r0 Submission March 2004 Eleanor Hepworth, Siemens Roke ManorSlide 5 User Scenario: Subscribed User Access Hotspot #1 Subscribed User AP Operator #1 AAA Server 2. Operator Discovery AP Hotspot #2 Operator #2 AAA Server Advertise Capability 1. Network Selection 3. Identity Selection 4. Authenticate 5. Authorisation and Accounting Policy (free access to “local services”)

doc.: IEEE /223r0 Submission March 2004 Eleanor Hepworth, Siemens Roke ManorSlide 6 Implications To support network selection: –Need to advertise network capability or characteristics e.g. cheapest, 3G interworking, free “local services” Identity selection: –Advertisement of set of operators associated with the hotspot Differential accounting: –Dynamic update of charging model per subscriber

doc.: IEEE /223r0 Submission March 2004 Eleanor Hepworth, Siemens Roke ManorSlide 7 Hotspot New User AP Advertise QoS Capability AAA Server 2. Authenticate 3. Authorisation Information 1. Network Selection Local AAA 5. Admission Control 4. Request QoS AP QoS request to Internet User Scenario: User Requesting QoS

doc.: IEEE /223r0 Submission March 2004 Eleanor Hepworth, Siemens Roke ManorSlide 8 Implications To support network selection: –Need to advertise network capability e.g. bit rates, cost Admission control: –Co-ordinate admission control decision with authorisation information for that user –Other network admission control decisions Traffic enforcement and policing: –Verify source of traffic and traffic behaviour

doc.: IEEE /223r0 Submission March 2004 Eleanor Hepworth, Siemens Roke ManorSlide 9 Suggested WIEN topics Network capability advertisement Roamed operator discovery New user sign up Dynamic configuration of AP –Interacts with new Wireless Network Management SG QoS control and enforcement