doc.: ieee 802.11-04/223r0 submission march 2004 eleanor hepworth, siemens roke manorslide 1...
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March 2004
Eleanor Hepworth, Siemens Roke ManorSlide 1
doc.: IEEE 802.11-04/223r0
Submission
Interworking Requirements
Eleanor Hepworth
Siemens Roke Manor
March 2004
Eleanor Hepworth, Siemens Roke ManorSlide 2
doc.: IEEE 802.11-04/223r0
Submission
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
March 2004
Eleanor Hepworth, Siemens Roke ManorSlide 3
doc.: IEEE 802.11-04/223r0
Submission
User Scenario: New User Sign Up
Hotspot
New User
AP
AP
AP
Advertise New UserSign Up
OperatorAAAServer
1. Secure User Sign Up for limited time(e.g. providing credit card details)
2. Configure AP to disconnect useron subscription expiration
3. Disconnect User
March 2004
Eleanor Hepworth, Siemens Roke ManorSlide 4
doc.: IEEE 802.11-04/223r0
Submission
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
March 2004
Eleanor Hepworth, Siemens Roke ManorSlide 5
doc.: IEEE 802.11-04/223r0
Submission
User Scenario: Subscribed User Access
Hotspot #1
SubscribedUser AP
AP
Operator #1AAA Server
2. Operator Discovery
AP
AP
Hotspot #2
Operator #2AAA ServerAdvertise Capability
1. Network Selection
3. IdentitySelection
4. Authenticate
5. Authorisation and Accounting Policy(free access to “local services”)
March 2004
Eleanor Hepworth, Siemens Roke ManorSlide 6
doc.: IEEE 802.11-04/223r0
Submission
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
March 2004
Eleanor Hepworth, Siemens Roke ManorSlide 7
doc.: IEEE 802.11-04/223r0
Submission
Hotspot
New User
AP
AP
Advertise QoS Capability
AAAServer
2. Authenticate
3. AuthorisationInformation
1. Network Selection
LocalAAA
5. Admission Control
4. Request QoSAP
QoS request to Internet
User Scenario: User Requesting QoS
March 2004
Eleanor Hepworth, Siemens Roke ManorSlide 8
doc.: IEEE 802.11-04/223r0
Submission
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
March 2004
Eleanor Hepworth, Siemens Roke ManorSlide 9
doc.: IEEE 802.11-04/223r0
Submission
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