May 2007 Andre w Myl es (C Slide 1 doc.: IEEE 802.11-07/0764r0 Submission Liaison report from the Wi-Fi Alliance to 802.11 WG Notice: This document has been prepared to assist IEEE 802.11. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.11. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures < http:// ieee802.org/guides/bylaws/sb-bylaws.pdf >, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair <[email protected]> as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at <[email protected]>. Date: 2007-05-16 N am e Com pany A ddress Phone E-m ail Andrew M yles Cisco +61 2 84461010 andrew.myles@ cisco.com Authors:
Transcript
May 2007
Andrew Myles (Cisco)
Slide 1
doc.: IEEE 802.11-07/0764r0
Submission
Liaison report from the Wi-Fi Alliance to 802.11 WG
Notice: This document has been prepared to assist IEEE 802.11. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.11.
Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures <http:// ieee802.org/guides/bylaws/sb-bylaws.pdf>, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair <[email protected]> as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at <[email protected]>.
• 82% of US hotels offer Wi-Fi– Source: American Hotel & Lodging Assn
Melbourne
May 2007
Andrew Myles (Cisco)
Slide 10
doc.: IEEE 802.11-07/0764r0
Submission
… which means the promise of one billion chipsets sold in a year might not be far off!
0
100
200
300
400
500
600
700
2006 2010
Dev
ices
(m
illi
on
)
Enterprise APsHome/SOHOCEPhonesPCsSource: In-Stat
• Both CE and Voice are forecast to make a big impact by 2010
• They will enable even more use of Wi-Fi both in all market segments
• One billion chipsets is forecast by 2012
CE
Voice
Not far from 1B!
May 2007
Andrew Myles (Cisco)
Slide 11
doc.: IEEE 802.11-07/0764r0
Submission
This historical (and future) success is based on the partnership of the 802.11 WG & the Wi-Fi Alliance
Standards development Product certification
May 2007
Andrew Myles (Cisco)
Slide 12
doc.: IEEE 802.11-07/0764r0
Submission
Like all great partnerships the IEEE 802.11 WG and the Wi-Fi Alliance need to “work on it”
• Like all great partners/marriages the WFA & the 802.11 WG have:– Had rocky moments
– eg liaison presentation in Nov 06
– Had disagreements– eg WFA introduction of “draft 11n” and WMM
– Imperfections on both sides– eg process issues
• But ultimately the WFA & the 802.11 WG need each other
• The rest of this presentation is based on the idea that WFA & the 802.11 WG can strengthen the relationship with:– Communications– Honesty– Learning from each other & history
May 2007
Andrew Myles (Cisco)
Slide 13
doc.: IEEE 802.11-07/0764r0
Submission
The agenda is focused on open communications between the WFA & the IEEE 802.11G
1
2
3
4
Who is the WFA?• What, who & how
What have the WFA done in the past?• Lessons learnt
What can the IEEE 802.11 WG do to help?
What are the WFA planning to do in the future?• Plans & possibilities
May 2007
Andrew Myles (Cisco)
Slide 14
doc.: IEEE 802.11-07/0764r0
Submission
The Wi-Fi Alliance is an international trade & certification association for 802.11 products
The Wi-Fi Alliance Is a non-profit internationaltrade association (ITA) that:
• Certifies the interoperability of IEEE 802.11based products using eleven independent testlabs in seven countries (over 3,400 so far)
• Facilitates collaboration within the ecosystem: manufacturers, standard bodies, regulators, service providers, and carriers
• Acts as a thought leader on all issues related to Wi-Fi products and technology
May 2007
Andrew Myles (Cisco)
Slide 15
doc.: IEEE 802.11-07/0764r0
Submission
The Wi-Fi Alliance has over 300 members with representation from across the ecosystem
Ful
l lis
t of m
embe
r co
mpa
nies
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ttp://
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w.w
i-fi.o
rg
Sp
on
so
rsS
am
ple
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gu
lar
me
mb
ers
May 2007
Andrew Myles (Cisco)
Slide 16
doc.: IEEE 802.11-07/0764r0
Submission
The Wi-Fi Alliance is truly international with only 44% of members based in the Americas
Europe15%
Asia-Pacific41%
Americas44%
… and we schedule one meeting per year per region
May 2007
Andrew Myles (Cisco)
Slide 17
doc.: IEEE 802.11-07/0764r0
Submission
Two sites: Japan
One site: Korea
Three sites: Taiwan
One site: China
Three sites: EU Two sites: USA
One site: India
One site: USAWFA R&D California
2007
One site: Taiwan
Pre-cert lab
Certification lab
The Wi-Fi Alliance has authorised certification labs in seven countries
May 2007
Andrew Myles (Cisco)
Slide 18
doc.: IEEE 802.11-07/0764r0
Submission
The primary goal of the Wi-Fi Alliance is ensure interoperability for customers & vendors
• The goal is to help ensure that 802.11 based products from multiple vendors work together to:– Reduce returns and customers support for vendors– Ensure an excellent user experience for customers
• This is achieved by testing 802.11 products against a test-bed of “golden products”:– Mostly using “low bar” performance testing– With some conformance testing– And some performance testing
• This test bed approach is a pragmatic solution well suited to the WLAN industry that provides a good compromise between:– Full conformance testing– Cost of testing
May 2007
Andrew Myles (Cisco)
Slide 19
doc.: IEEE 802.11-07/0764r0
Submission
The WFA uses a governance model based on work done in Task Groups with review by the BoD
Law
TG
• Self selected group of members, often with a commercial interest in the activities of the TG
• Quite rightly, they do not necessarily have the interest of all members at “top of mind”
BoD & TGs counterbalance each other,in a way that other systems would not
BoD
• Directors, although appointed by Sponsors, must act in interests of all members (“fiduciary duty”)
• The BoD acts as “house of review” to ensure recommendations from TGs make sense for the WFA
Directorresponsibilities
•Act in compliance with the law
•Act in the best interests of the WFA
•…
Observation: there is no equivalent body in the IEEE 802.11 WG, which sometimes deadlocks with no mechanism for resolution
May 2007
Andrew Myles (Cisco)
Slide 20
doc.: IEEE 802.11-07/0764r0
Submission
The agenda is focused on open communications between the WFA & the IEEE 802.11G
1
2
3
4
Who is the WFA?• What, who & how
What have the WFA done in the past?• Lessons learnt
What can the IEEE 802.11 WG do to help?
What are the WFA planning to do in the future?• Plans & possibilities
May 2007
Andrew Myles (Cisco)
Slide 21
doc.: IEEE 802.11-07/0764r0
Submission
The WFA have a continuing pipeline of certifications, from which we continue to “learn”
Market development
Another time
Influencing
Another time
Certifications
When?
Status?
Number?
Observations?
Lessons?• These lessons can be used to draw a variety of conclusions
• In this presentation, we will explore some possibilities
• However, final conclusions are “homework” for all of us
May 2007
Andrew Myles (Cisco)
Slide 22
doc.: IEEE 802.11-07/0764r0
Submission
The Wi-Fi Alliance currently has certifications for PHY, security, QoS, spectrum man. & convergence …
PHYs
• 802.11b (2.4GHz)
• 802.11a (5GHz)
• 802.11g (2.4GHz)
Security
• WPA™ - Personal/Enterprise
• WPA2™ - Personal/Enterprise
• Extended EAP testing
• Wi-Fi Protected Setup™
Quality of Service
• WMM™
• WMM™ Power Save
Spectrum management
• 802.11h+d
Convergence
• CWG-RF
May 2007
Andrew Myles (Cisco)
Slide 23
doc.: IEEE 802.11-07/0764r0
Submission
… and there have been almost 3,500 products certified by the WFA since 2000
• Users have diverse needs and will not be told they can only have a single solution
• Users sometimes want proprietary mechanisms
May 2007
Andrew Myles (Cisco)
Slide 30
doc.: IEEE 802.11-07/0764r0
Submission
The Wi-Fi Protected Setup certification aims to make security easy to set up in the home
Name
• Wi-Fi Protected Setup™ - PIN
• Wi-Fi Protected Setup™ - PBC
Introduced
• January 2007
Status
• Optional
Certifications
• PIN: 32 (May 2006)
• PBC: 22 (May 2006)
Observations
• WFA developed a specification to make easier for home users to configure security
• Two variants are currently certified (PIN, Push Button) with NFC likely soon
• Relatively new certification and its success is still unclear
Lessons for WFA & IEEE
• Developing good specifications or standards is hard!
• Enterprise & home markets have different needs
May 2007
Andrew Myles (Cisco)
Slide 31
doc.: IEEE 802.11-07/0764r0
Submission
The success of the WMM certification of QoS is building after a slow (& maybe too early) start
Name
• WMM (Wi-Fi Multimedia™)
Introduced
• September 2004 (standard ratified Sept 05)
Status
• Optional
Certifications
• 379 (May 2006)
Observations
• Based on WFA’s WMM spec, which is similar to a fraction of 802.11e (EDCA)
• WMM developed when it seemed unlikely 11e would be ratified soon
• WMM success has been slow but is now building because EDCA is needed in new apps
Lessons for WFA & IEEE
• It’s really hard to pick what is needed and when
May 2007
Andrew Myles (Cisco)
Slide 32
doc.: IEEE 802.11-07/0764r0
Submission
The WMM Power Save certification provides a platform for “next generation” applications like voice
Name
• WMM (Wi-Fi Multimedia™) Power Save
Introduced
• December 2005(standard ratified Sept 05)
Status
• Optional
Certifications
• 41 (May 2006)
Observations
• Based on WFA’s WMM specification, which is similar to APSD in 802.11e
• Success has been slow but it is believed need for WMM-PS will grow because it is an enabling technology for many “next generation” applications– eg voice
Lessons for WFA & IEEE
• The promise of voice is coming but slowly
May 2007
Andrew Myles (Cisco)
Slide 33
doc.: IEEE 802.11-07/0764r0
Submission
The CWG-RF certification represents the first significant WFA experiment in performance testing
Name
• RF Performance Evaluation of Wi-Fi Mobile Converged Devices
Introduced
• Sept 2006
Status
• WFA optional
• CTIA mandatory for– CDMA/Wi-Fi in April 07– GSM/Wi-Fi soon!
Certifications
• 1 (May 2006)
Observations
• Joint certification with the CTIA
• First WFA experiment with performance testing
• Certifies the RF performance of mobile converged devices (but results are private to vendor)
• Limited impact or success so far but expected to ramp soon now that CTIA making it mandatory & number of labs increasing
Lessons for WFA & IEEE
• None yet …
May 2007
Andrew Myles (Cisco)
Slide 34
doc.: IEEE 802.11-07/0764r0
Submission
The 11h+d certification, representing a small part of 802.11h/d, is useful but not required for 5GHz operation
Name
• 802.11h+d
Introduced
• Early 2004
Status
• Optional– 11h in 5GHz band– 11d in 2.4GHz 7 5GHz bands
Certifications
• 11h: 106 (May 2006)
• 11d: 119 (May 2006)
Notes
• Based on very small subset of 802.11h and 802.11d
• Uses conformance testing
• Makes use of 5GHz band with radar requirements easier but it is not actually required
Lessons for WFA & IEEE
• The market will use only the subset of 802.11 amendments that it perceives to be useful– ie very little of 802.11h is actually
tested as part of certification
May 2007
Andrew Myles (Cisco)
Slide 35
doc.: IEEE 802.11-07/0764r0
Submission
The “lessons” highlight the contradicting forces we face together & a potential new direction
Make the right features
available to the market on time
Standardisation by committee
• Start early
• Anticipate the market
• Produce“bloat-ware”
• Get it wrong and waste effort
Standardisation by the market
• Start late
• Follow themarket
• Act as“rubber stamp”
• Get it rightbut too late
Go
al
The answer should be a compromise
• The IEEE & WFA can work together to satisfy market needs in a timely manner, eg 11i/WPA
• The IEEE & WFA need to avoid:– Working against each
other, eg 11e/WMM– Ignoring each other,
eg early WFA input into 11n
One extreme Other extreme
May 2007
Andrew Myles (Cisco)
Slide 36
doc.: IEEE 802.11-07/0764r0
Submission
The agenda is focused on open communications between the WFA & the IEEE 802.11G
1
2
3
4
Who is the WFA?• What, who & how
What have the WFA done in the past?• Lessons learnt
What can the IEEE 802.11 WG do to help?
What are the WFA planning to do in the future?• Plans & possibilities
May 2007
Andrew Myles (Cisco)
Slide 37
doc.: IEEE 802.11-07/0764r0
Submission
The WFA has definite plans for new certifications, mostly related to the voice opportunity
PHY/MAC
• Draft 802.11n
Applications
• Voice Over Wi-Fi– Home & Small Office– Enterprise
QoS
• WMM– Admission Control
Wi-Fi Mobile Convergence
• Device class
May 2007
Andrew Myles (Cisco)
Slide 38
doc.: IEEE 802.11-07/0764r0
Submission
The WFA will start the draft 802.11n certification in June 07Name
• The market has demanded a certification on baseline 11n well before 11n is ratified; both WFA & IEEE are late
• Press release issued today, with consumer white paper & test bed
Lessons for WFA & IEEE
• The market will respond without waiting for the standards or certification processes
May 2007
Andrew Myles (Cisco)
Slide 39
doc.: IEEE 802.11-07/0764r0
Submission
The planned WFA device class certification will support the needs of converged devices
Name
• WMC – Device class
Planned
• 2007?
Status
• Optional
Observations
• Defines three types of tests for converged devices when the cellular phone is active & when a cellular signal is present:– Association tests– Throughput tests– VoWi-Fi tests
• Verifies converged devices can handle Wi-Fi data/voice applications with acceptable performance during simultaneous cellular operation
May 2007
Andrew Myles (Cisco)
Slide 40
doc.: IEEE 802.11-07/0764r0
Submission
The planned Voice – Home and Small Office certification will extend Wi-Fi testing into the realm of performance
Name
• Voice – Home & Small Office
Planned
• 2007?
Status
• Optional
Observations
• Uses existing WFA certifications tests as baseline, including WMM & WMM-PS
• Adds minimum performance tests to show operation possible with four voice streams:– Throughput– Packet Loss– Delay bound– Jitter
May 2007
Andrew Myles (Cisco)
Slide 41
doc.: IEEE 802.11-07/0764r0
Submission
The planned Voice – Enterprise certification will extend Wi-Fi testing into the realm of performance
Name
• Voice – Enterprise
Planned
• 2008?
Status
• Optional
Observations
• Similar concepts to Voice – Home & Small Office
• Extended to handle requirements of the enterprise, particularly for low latency hand-off and measurement
• Will also includes tests for:– 802.11r functionality– 802.11k functionality– WMM-AC
May 2007
Andrew Myles (Cisco)
Slide 42
doc.: IEEE 802.11-07/0764r0
Submission
The WMM-AC certification will extend the WMM certification to admission control
Name
• WMM-Admission Control
Planned
• March 2008
Status
• Optional
Observations
• Based on WMM specification, although some efforts are being made to realign aspects with 11e
May 2007
Andrew Myles (Cisco)
Slide 43
doc.: IEEE 802.11-07/0764r0
Submission
The WFA has less definite plans for additional certifications in the medium term
Applications
• Video
Security
• Extended EAP methods
• Management frame protection (based on 802.11w)
• Wi-Fi Protected Setup™ extensions
Wi-Fi Mobile Convergence
• Handover
• RF Performance with Blue Tooth
• Power consumption
Other
• Mesh(based on 802.11s)
May 2007
Andrew Myles (Cisco)
Slide 44
doc.: IEEE 802.11-07/0764r0
Submission
The WFA has very vague plans for additional certifications in the long term
Standards
• 802.11p (Vehicular W-Fi)?
• 802.11u (Interfacing with external networks)?
• 802.11v (Radio Resource Management)?
• 802.11y (3.6GHz PHY)?
• …
Other
• Who knows?
May 2007
Andrew Myles (Cisco)
Slide 45
doc.: IEEE 802.11-07/0764r0
Submission
?Developown specs
Use 802.11specs
Use otherspecs
The likely & possible certifications highlight a variety of challenges facing the WFA
Follow the market Lead the market
Interoperability
Performance
Conformance
Layer 1/2 only Upper layers tooPartnership
with others
May 2007
Andrew Myles (Cisco)
Slide 46
doc.: IEEE 802.11-07/0764r0
Submission
The agenda is focused on open communications between the WFA & the IEEE 802.11G
1
2
3
4
Who is the WFA?• What, who & how
What have the WFA done in the past?• Lessons learnt
What can the IEEE 802.11 WG do to help?
What are the WFA planning to do in the future?• Plans & possibilities
May 2007
Andrew Myles (Cisco)
Slide 47
doc.: IEEE 802.11-07/0764r0
Submission
VHTDLSQES
VTS
One view of 802.11 suggests it is succeeding in supporting “everywhere for everyone”
• Supports industry-wide branding and communications
Mar
keti
ng
• Defines complex, feature-rich technical standards for PHY and MACT
ech
nic
al • Specifies subsets of IEEE standards
• Undertakes interoperability testing T
ech
nic
al • Adds differentiating features based on standards, but often before standardsT
ech
nic
al
• Sells and supports vendor’s wireless productsS
ales
• Markets vendor’s wireless products
Mar
keti
ngTraditional model
places standards group too far from
“market needs” resulting in slow development &
bloated standards
May 2007
Andrew Myles (Cisco)
Slide 55
doc.: IEEE 802.11-07/0764r0
Submission
The traditional model of throwing standards & certifications “over the wall” no longer works
VendorsIndustryassociation
Standardsgroup
The current model
“throw it over the wall”
A better model?
“work together continuously”
May 2007
Andrew Myles (Cisco)
Slide 56
doc.: IEEE 802.11-07/0764r0
Submission
So what can the 802.11 WG do to better meet market needs in a timely manner?
Some suggestions can be added to those made in Nov 06
• Internally focused options might include:– Consider smaller more focused amendments?– Develop less (big) amendments in parallel?– Change culture away from rules based back to consensus?
• Externally focused options might include– Only standardise proven technologies, with less “academia”?– Change direction (even midstream) based on industry feedback?– Find ways to support certification of stable elements of drafts? – Adopt what industry does as a matter of course? eg WMM/11e– Look for new standards development models? eg wrt VHT?
• The answer is up to the IEEE 802.11 WG but will have an effect on the continuing market relevance of the 802.11 standardMarket needs?
May 2007
Andrew Myles (Cisco)
Slide 57
doc.: IEEE 802.11-07/0764r0
Submission
The WFA is willing to help in whatever way necessary because this is our industry too!
The WFA want to use 802.11 standards to meet market needs
• Allow us to evaluate market needs relative to technical features on an ongoing basis
• Consider changing course based on these markets evaluations
• Help us to provide certification of early drafts (perhaps by standardisation of subsets of features) to the market
• …
May 2007
Andrew Myles (Cisco)
Slide 58
doc.: IEEE 802.11-07/0764r0
Submission
Only Wi-Fi CERTIFIED makes it Wi-Fi!
• Visit www.wi-fi.org for:– White papers– Listing of Wi-Fi CERTIFIED products– Membership information
• Membership options include:– Regular membership for those interested in influencing and
participating in certification activities– Adopter membership for ecosystem players who want insight into the
industry
• More information may be obtained from:– Frank Hanzlik (Managing Director) - [email protected]– Andrew Myles (Chairman) – [email protected]
