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Effectiveness of Reduction of Message Exchanges

Effectiveness of Reduction of Message Exchanges. Authors:. Date: 2010-07-14. Significant comments to FIA. Proposed idea and scope Reducing the number of massage exchange of association and authentication. Comment Is this enough effective to reduce the total link set up time?

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Effectiveness of Reduction of Message Exchanges

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  1. Effectiveness of Reduction of Message Exchanges Authors: Date: 2010-07-14 Hiroki Nakano, Trans New Technology, Inc.

  2. Significant comments to FIA • Proposed idea and scope • Reducing the number of massage exchange of association and authentication. • Comment • Is this enough effective to reduce the total link set up time? • Should we consider the reduction of the number of exchanges of the higher layer? Hiroki Nakano, Trans New Technology, Inc.

  3. STA AP 1/16 = 6.25% Probe (1 round trip) Authentication (1 round trip) 2/16 = 12.5% Association (1 round trip) EAPOL-Start Most of message exchanges are consumed for Authentication and Association. EAPOL-Start (0.5round trip) EAP-Identity (1 round trip) Establishing TLS tunnel for PEAP (3 round trip) 11/16 = 68.75% PEAP EAP-MSCHAPv2 (4 round trip) EAP-Success EAPOL-Success (0.5round trip) EAPOL-Key (2 round trip) DHCP (2 round trip) 2/16=12.5% Hiroki Nakano, Trans New Technology, Inc.

  4. How many roundtrips do messages go? 75% off! Hiroki Nakano, Trans New Technology, Inc.

  5. Other considerations • Channel scan sometimes employs a few seconds. • This is an implementation issue. • An STA having multiple channel radio can do for a couple of milliseconds. • DHCP for IPv4 sometimes employs a few seconds. • This is another implementation issue. • An STA can send DHCPREQUEST as soon as receive the first DHCPOFFER. This enables STA to complete DHCP process in a few 10 milliseconds without any violation against RFC2131 (Dynamic Host Configuration Protocol). Hiroki Nakano, Trans New Technology, Inc.

  6. Collaboration with DHCP 50% off! • If 802.11 provides mechanism transferring data to assign an IP address during process of 802.11, total message exchanges are reduced moreover. • But this is a minor problem. Hiroki Nakano, Trans New Technology, Inc.

  7. Conclusion • Question • Is this enough effective to reduce the total link set up time? • Should we consider the reduction of the exchange number of the higher layer? • Answer • During setting up link, most time-consuming part is “Authentication and key distribution.” • FIA tries to shorten the very part. • If 802.11 helps its upper layer, things get better. Hiroki Nakano, Trans New Technology, Inc.

  8. Questions and Comments? Hiroki Nakano, Trans New Technology, Inc.

  9. Hiroki Nakano, Trans New Technology, Inc.

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