Network Selection Problem Definition Draft-ietf-eap-netsel-problem-01.txt - PowerPoint PPT Presentation

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Network Selection Problem Definition Draft-ietf-eap-netsel-problem-01.txt

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Request feedback on problem selection document from 802.11. ... Issue: Relationship between mediating network and identifier selection ... – PowerPoint PPT presentation

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Title: Network Selection Problem Definition Draft-ietf-eap-netsel-problem-01.txt


1
Network Selection Problem DefinitionDraft-ietf-ea
p-netsel-problem-01.txt
  • Jari Arkko
  • Bernard Aboba

2
Outline
  • History and Status
  • The basic problem
  • Issues

3
History and Status
  • Draft -00 created based on EAP WG discussions
    that started with Farids draft
  • Additional work during the last few months
  • NAIbis in RADEXT WG
  • Farids EAP network discovery draft
  • The Groeting draft and implementation results
  • IEEE WIEN network selection work
  • 3GPP network selection work
  • Draft -01 updates the problem definition based on
    discussions and external events

4
Recent Developments
  • IEEE 802.11 WIEN study group formed.
  • Liaison letter received from 802.11 Chair,
    requesting review of network discovery documents.
  • Plan
  • Request feedback on problem selection document
    from 802.11.
  • Update problem statement document to incorporate
    feedback.
  • EAP WG last call.

5
The Basic Problem
6
Theres actually multiple problems
  • Access Network Discovery
  • Which access point to attach to?
  • Typically based on lower layer information.
  • Identifier Selection
  • Which identity and credentials to use for this
    AP?
  • An NAI issue which affects EAP.
  • Selection of roaming intermediaries
  • How to route the AAA conversation to the home
    network?
  • Payload Routing
  • How to route payload traffic in the right way
  • Filters and mandatory tunnels

7
An alternative decomposition
  • Discovery
  • Access networks and access points
  • Home networks available through these
  • Mediating networks
  • Decision
  • Manual or automatic
  • Automatic is preferred
  • Most likely needs some pre-provisioned preference
    information
  • Indicating the selected network
  • Attach to the chosen network and access point
  • Provide the chosen identity and home domain
  • Possibly provide some hints about mediating
    networks

8
Yet another alternative decomposition
  • Type of information discovered
  • Access network identity
  • Roaming agreements
  • QoS
  • Cost
  • Service parameters
  • ...

9
Some Earlier Findings...
  • All the problems are relevant, and new solutions
    are needed
  • The problems are very hard if you consider them
    with large number of networks, fast handoffs,
    security, and automatic decisions
  • The proliferation of multiple network selection
    technologies within IEEE 802, IETF, and 3GPP
    would be bad
  • Need to produce some early, simple solutions and
    wait for more full-blown schemes later

10
Issues
11
Issue Scope of Information
  • A larger amount of information may be necessary
    for (ideal) network selection
  • Service parameters, middlebox existence
  • QoS, Cost
  • EAP is an unlikely carrier for this information
  • What about the verification of this information
    vs channel bindings?
  • Proposal just discuss the problem without
    talking about where the information is carried.
    Point out possible connection with channel
    bindings to verify the information.

12
Issue Relationship between mediating network and
identifier selection
  • Observation both mediating networks and
    identifiers are represented in the same data item
    (NAI)
  • Would an EAP network discovery advertisement work
    rather as a general identity hint than
    mediating-network-only hint?
  • Hint foo.com
  • Possible NAI to use jari_at_foo.com
  • Another possible NAI arkko.com!jari_at_foo.com
  • Proposal Document this relationship

13
Issue Documenting Ongoing Work in Other SDOs
  • Need to add a more up-to-date description of what
    IEEE 802.11 WIEN is working on
  • Anything else?
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