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Doc.: IEEE 802.11-11/0977r1 Submission NameAffiliationsAddressPhoneemail Hitoshi MORIOKA ROOT INC.2-14-38 Tenjin, Chuo-ku, Fukuoka 810-0001 JAPAN +81-92-771-

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Presentation on theme: "Doc.: IEEE 802.11-11/0977r1 Submission NameAffiliationsAddressPhoneemail Hitoshi MORIOKA ROOT INC.2-14-38 Tenjin, Chuo-ku, Fukuoka 810-0001 JAPAN +81-92-771-"— Presentation transcript:

1 doc.: IEEE 802.11-11/0977r1 Submission NameAffiliationsAddressPhoneemail Hitoshi MORIOKA ROOT INC.2-14-38 Tenjin, Chuo-ku, Fukuoka 810-0001 JAPAN +81-92-771- 7630 hmorioka@root-hq.com Hiroshi ManoROOT INC.7-21-11 Nishi- Gotanda, Shinagawa- ku, Tokyo 141-0031 JAPAN +81-3-5719- 7630 hmano@root-hq.com Mark RISONCSRCambridge Business Park, Cowley Road, Cambridge CB4 0WZ UK +44-1223- 692000 Mark.Rison@csr.com Marc EmmelmannFraunhofer FOKUS Kaiserin-Augusta- Alle 31 10589 Berlin Germany +49-30-3463- 7268 emmelmann@ieee.org July 2011 Hitoshi Morioka, ROOT INC.Slide 1 TGai Upper Layer Setup Proposal Date: 2011-07-17 Authors:

2 doc.: IEEE 802.11-11/0977r1 Submission July 2011 Hitoshi Morioka, ROOT INC.Slide 2 Abstract This document describes a technical proposal for TGai which addresses the following phase. Upper Layer Setup

3 doc.: IEEE 802.11-11/0977r1 Submission Conformance w/ Tgai PAR & 5C July 2011 Hitoshi Morioka, ROOT INC.Slide 3 Conformance QuestionResponse Does the proposal degrade the security offered by Robust Security Network Association (RSNA) already defined in 802.11? No Does the proposal change the MAC SAP interface?No Does the proposal require or introduce a change to the 802.1 architecture?No Does the proposal introduce a change in the channel access mechanism?No Does the proposal introduce a change in the PHY?No Which of the following link set-up phases is addressed by the proposal? (1) AP Discovery (2) Network Discovery (3) Link (re-)establishment / exchange of security related messages (4) Higher layer aspects, e.g. IP address assignment 4

4 doc.: IEEE 802.11-11/0977r1 Submission Upper Layer Information IE We, IEEE802.11, should specify only a container IE which deliver upper layer information. Because –Our scope is L1 and L2. –DHCP options are growing and difficult to follow. –IP specific contents should be specified by IETF. So we should make liaison to IETF and discuss in IETF. July 2011 Hitoshi Morioka, ROOT INC.Slide 4

5 doc.: IEEE 802.11-11/0977r1 Submission Introduction of an Example Solution We intend to show just technical probability by this example. Detailed specification should be discussed in IETF. July 2011 Hitoshi Morioka, ROOT INC.Slide 5

6 doc.: IEEE 802.11-11/0977r1 Submission DHCPv4 Usually 4 messages are exchanged in DHCPv4. DHCPv4 allows multiple servers on a single subnet. DHCPREQUEST is broadcasted to notify which server is selected. July 2011 Hitoshi Morioka, ROOT INC.Slide 6 Client Server DHCPDISCOVER (Broadcast) DHCPOFFER (Unicast or Broadcast) DHCPREQUEST (Broadcast) DHCPACK (Unicast or Broadcast)

7 doc.: IEEE 802.11-11/0977r1 Submission FILS delivers DHCP messages STA put a DHCP message to UpperLayer Information IE and transmit to AP. AP picks up the DHCP message from Upper Layer Information IE, then constructs complete DHCP message and transmit it to DHCP Server. And vice versa. July 2011 Hitoshi Morioka, ROOT INC.Slide 7 STA AP DHCP Server FILS message Upper Layer Info IE DHCP message FILS message Upper Layer Info IE

8 doc.: IEEE 802.11-11/0977r1 Submission Modifications Maximum length of IE is limited to 256 octet. So one DHCP message may be divided into multiple IEs. If FILS uses only one round-trip message exchange, more modifications are required. July 2011 Hitoshi Morioka, ROOT INC.Slide 8

9 doc.: IEEE 802.11-11/0977r1 Submission One Round-trip DHCP modification 1.When AP starts up, AP transmit DHCPDISCOVER to DHCP Servers. 2.DHCP servers transmit DHCPOFFER to the AP. 3.The AP selects one DHCP server and broadcast DHCPREQUEST without IP address assignment. 4.The selected DHCP server transmits DHCPACK to the AP without IP address assignment. 5.STA transmits DHCPREQUEST in FILS message. This may or may not include specific (desired) IP address. 6.The AP transfer it to the selected DHCP server. 7.DHCP server assigns IP address even if the DHCPREQUEST does not include specific IP address. 8.The AP transfer it to the STA in FILS message. DHCP modifications are red-lined. July 2011 Hitoshi Morioka, ROOT INC.Slide 9 STA AP DHCP Server DHCP Server 1 2 3 4 5 8 DHCP Server DHCP Server 6 7

10 doc.: IEEE 802.11-11/0977r1 Submission Questions & Comments July 2011 Hitoshi Morioka, ROOT INC.Slide 10

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