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History of 802.11s Standardization

History of 802.11s Standardization

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History of 802.11s Standardization

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  1. History of 802.11s Standardization Authors: Date: 2007-09-12 Donald Eastlake 3rd, Motorola

  2. Abstract A snapshot of the history of the 802.11s standardization effort. Donald Eastlake 3rd, Motorola

  3. History of 802.11s StandardizationIn the beginning • Nov 2003 – 802.11 ESS Mesh Study Group created. • Jan 2004 – 802.11 ESS Mesh Study Group recommends a charter (PAR) and justification (5 Criteria) for an 802.11 ESS Mesh Networking Task Group. • Mar 2004 – Approval of 802.11s PAR (Charter) and 5 Criteria (Justification) by 802 Executive Committee for forwarding to IEEE-SA. • May 13, 2004 – 802.11s approved by IEEE-SA. Donald Eastlake 3rd, Motorola

  4. History of 802.11s StandardizationMain Points of Initial PAR (Charter) • Produce an amendment to the 802.11 standard creating a Wireless Distribution System with automatic topology learning and dynamic wireless path configuration. • Target number of packet forwarding nodes: ~32 • Support unicast and broadcast/multicast traffic. • Use 802.11i security or an extension thereof. • Extensible routing to allow for alternative forwarding path selection metrics and/or protocols. • Use the 802.11 four-address frame format or an extension. • Interface with higher layers and connect with other networks using higher layer protocols. • Limited to the Extended Service Set (AP meshing) case. Donald Eastlake 3rd, Motorola

  5. History of 802.11s StandardizationIn the beginning • Jan 2005 – Call for 802.11s proposals issued. 35 notices of intent to submit a proposal were received. Call referenced the following documents developed by 802.11s: • Usage Models • Functional Requirements and Scope • Comparison Categories and Informative Checklists • July 2005 – 15 proposals actually presented. • Mar 2006 – One Joint Proposal, supported by Motorola, presented and unanimously (vote 119-0-3) adopted as the baseline for the 802.11s standard. Call for informal technical comments issued with 1 May 2006 deadline. Donald Eastlake 3rd, Motorola

  6. History of 802.11s StandardizationUse Cases • Initial list: • Residential, Office, Campus/Community/Public Access, Public Safety, and Car-to-Car. • 802.11s voted to remove the car-to-car case and add a military case. The Military and Public Safety cases were almost merged. Final result: • Residential • Office • Campus/Community/Public Access • Public Safety • Military Donald Eastlake 3rd, Motorola

  7. Airespider ATR BAE Systems BelAir Cisco Systems ComNets NTT DoCoMo Firetide Fujitsu Hewlett Packard Huawei Intel InterDigital History of 802.11s StandardizationProposal Sponsors Affiliations of authors of the Joint Proposal • ITRI • Kiyon • Kyushu University • MITRE • Mitsubishi Electric • Motorola • NextHop • NICT • Nokia • Nortel • NRL • NTUST • Oki Electric • PacketHop • Philips • Qualcomm • Samsung • Siemens • Sony • STMicroelectronics • Swisscom • Texas Instruments • Thomson • Tropos • Wipro Donald Eastlake 3rd, Motorola

  8. History of 802.11s StandardizationGetting to the First Letter Ballot • May 2006 – 283 informal comments received from 18 people. • Nov 2006 – The informal comments having been resolved, 802.11s Draft D1.0 was sent to its first Letter Ballot. • Jan 2006 – D1.0 failed with a 48.3% approval required and a little over 5,700 comments. (Most 802.11 Drafts fail their first Letter Ballot and some fail 2 or 3 times before achieving 75% approval and getting into recirculation.) Donald Eastlake 3rd, Motorola

  9. History of 802.11s StandardizationLetter Ballot Comment Resolution Donald Eastlake 3rd, Motorola

  10. History of 802.11s StandardizationLetter Ballot Comment Resolution Donald Eastlake 3rd, Motorola

  11. History of 802.11s StandardizationResolution of PAR Defect • The Joint Proposal and all Drafts ignored PAR restriction to AP meshing. This could cause problems late in the process. • Jan 2007 – Motion to amend PAR fails in 802.11 WG at a lightly attended closing plenary by one vote (74.82% approval) due to inadequate socialization in advance. • Mar 2007 – Motion to amend PAR passes in 802.11 WG (91.34% approval). • July 2007 – PAR amendment approved unanimously by 802 Executive Committee. • 22 August 2007 – PAR amendment approved by IEEE-SA. • Current PAR • http://standards.ieee.org/board/nes/projects/802-11s.pdf Donald Eastlake 3rd, Motorola

  12. 802.11 Stations Mesh Access Points Mesh Points Access Points History of 802.11s StandardizationResolution of PAR Defect • New PAR allows Mesh Point capabilities to be orthogonal to Access Point capabilities. Donald Eastlake 3rd, Motorola