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Transcript of Doc.: IEEE 802.11-07/0764r0 Submission May 2007 Andrew Myles (Cisco)Slide 1 Liaison report from the...
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]>.
Date: 2007-05-16
Name Company Address Phone E-mail
Andrew Myles Cisco +61 2 84461010 [email protected]
Authors:
May 2007
Andrew Myles (Cisco)
Slide 2
doc.: IEEE 802.11-07/0764r0
Submission
This presentation is made to the IEEE 802.11 WG on behalf of the Wi-Fi Alliance
Andrew Myles, the presenter is:
• Employed by Cisco Systems
• Affiliated with Cisco Systems
• Chairman of the Wi-Fi Alliance
• Presenting on behalf of the Wi-Fi Alliance
• Presenting in response to an invitation by the 802.11 WG Chair
May 2007
Andrew Myles (Cisco)
Slide 3
doc.: IEEE 802.11-07/0764r0
Submission
Research shows 802.11 (aka Wi-Fi) is becoming an essential part of our everyday lives
Research in the US reveals some factoids about the impact of Wi-Fi …
• 80% say Wi-Fi is more essential than their iPod
• 81% would rather see their favourite team lose than give up Wi-Fi for a week
• 90% would rather do without their daily Starbucks than their Wi-Fi
… the bottom line is that Wi-Fi is affecting real people in their everyday lives
Source: WFA/Kelton Research,July & October 2006
May 2007
Andrew Myles (Cisco)
Slide 4
doc.: IEEE 802.11-07/0764r0
Submission
Wi-Fi has become popular based on products that are not optimised for wireless use …
.. with apologies to all those in the PC industry
• Not very usable while on the move
• Not really suitable for many voice applications
• Until recently, laptops were mainly an enterprise style product
May 2007
Andrew Myles (Cisco)
Slide 5
doc.: IEEE 802.11-07/0764r0
Submission
… and yet the Wi-Fi market reached over 200 million chipsets per year in 2006
• In 1997, the first IEEE 802.11 standard was ratified
• In 2005, over 150 millionWi-Fi devices were sold
• In 2006, over 200 millionWi-Fi devices were sold(33% growth rate)
Enterprise APs
Home/SOHO
CEPhones
PCs0
40
80
120
160
200
2005 2006
Dev
ices
(m
illio
n)
Source: In-Stat
May 2007
Andrew Myles (Cisco)
Slide 6
doc.: IEEE 802.11-07/0764r0
Submission
Wi-Fi is now being implemented in a wide variety of more interesting devices …
Microsoft Zune
Sony mylo Nikon CoolpixSony PS3
NabaztagNokia N series
May 2007
Andrew Myles (Cisco)
Slide 7
doc.: IEEE 802.11-07/0764r0
Submission
… including lots of Wi-Fi & Wi-Fi/cellular converged phone devices …
May 2007
Andrew Myles (Cisco)
Slide 8
doc.: IEEE 802.11-07/0764r0
Submission
… with some of the new devices actually used for voice (and not just data) …
• Numerous Wi-Fi carrier voice and data deployments are underway, and others expected during 2007 and 2008
• Wi-Fi with UMA is the predominant voice approach today, although SIP solutions also exist
• Examples of voice deployments include:– BT Fusion:voice & data in the home/office network at more than
2,000 Openzone hotspots– Orange Unik for Professionals: provides Wi-Fi to GSM handoff,
and includes unlimited use for Wi-Fi calls– NTT DoCoMo: SIP-based voice for large enterprise customers
May 2007
Andrew Myles (Cisco)
Slide 9
doc.: IEEE 802.11-07/0764r0
Submission
… based on access in many locations outside the home or office …
• 143k+ hot spots in 132 countries– Source: JiWire (12 March 2007)– Other sources indicate 200k+ hot spots
• 500+ muni deployments in 29 countries– Source: Tropos & WFA
• 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
at h
ttp://
ww
w.w
i-fi.o
rg
Sp
on
so
rsS
am
ple
re
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
0
500
1,000
1,500
2,000
2,500
3,000
3,500
Jan-00 Jan-01 Jan-02 Jan-03 Jan-04 Jan-05 Jan-06 Jan-07
Ag
gre
gra
te p
rod
uct
s ce
rtif
ied
May 2007
Andrew Myles (Cisco)
Slide 24
doc.: IEEE 802.11-07/0764r0
Submission
The 802.11b certification seeded the incredible success of the Wi-Fi industry
Name
• 802.11b
Introduced
• April 2000(standard ratified Sept 99)
Status
• Mandatory (if implemented)
Certifications
• 2,746 (May 2006)
Observations
• PHY & MAC certification based 802.11b and DCF MAC
• 802.11b is a wildly successful certification that was the basis of the early success of Wi-Fi
• 802.11b was the right standard/product at the right time
Lessons for WFA & IEEE
• Simple & interoperable products that meet a need are “deadly” in the market
May 2007
Andrew Myles (Cisco)
Slide 25
doc.: IEEE 802.11-07/0764r0
Submission
The 802.11a standard and certification was probably “before its time”
Name
• 802.11a
Introduced
• October 2002(standard ratified Sept 99)
Status
• Mandatory (if implemented)
Certifications
• 556 (May 2006)
Observations
• PHY & MAC certification based 802.11a and 802.11 DCF MAC
• 802.11a was not as successful in the market as originally hoped– Only 556x 802.11a certifications
vs 2,746x 802.11b certifications– 802.11a’s problem was that
802.11b/g based on 2.4GHz was “good enough” for a long time
Lessons for WFA & IEEE
• Good standards and proven interoperability are not enough for success
May 2007
Andrew Myles (Cisco)
Slide 26
doc.: IEEE 802.11-07/0764r0
Submission
The 802.11g certification leveraged 802.11b’s success in 2.4GHz and 802.11a’s technology
Name
• 802.11g
Introduced
• July 2003(standard ratified June 03)
Status
• Mandatory (if implemented)
Certifications
• 1,932 (May 2006)
Observations
• PHY & MAC certification based 802.11g and 802.11 DCF MAC
• 802.11g is a wildly successful certification that has leveraged 802.11b’s success in 2.4GHz and 802.11a’s technology
Lessons for WFA & IEEE
• The combination of backward compatibility, improved performance and an easy upgrade path is usually better
May 2007
Andrew Myles (Cisco)
Slide 27
doc.: IEEE 802.11-07/0764r0
Submission
The WPA certification addressed the “WEP issue” in partnership with the IEEE 802.11 WG
Name
• Wi-Fi Protected Access– WPA – Personal– WPA - Enterprise
Introduced
• April 2003(standard ratified June 04)
Status
• Mandatory
Certifications
• Personal: 2,076 (May 2006)
• Enterprise: 1,709 (May 2006)
Observations
• WPA is based on the TKIP aspects of 802.11i– “Personal” is based on PSK– “Enterprise” is based on 802.1X
• WPA was introduced (in partnership with IEEE) well before 802.11i was ratified to address the “WEP debacle”
Lessons for WFA & IEEE
• The option to configure security operation is a “threshold attribute”
• WFA & IEEE can work together on pre-ratification certifications
May 2007
Andrew Myles (Cisco)
Slide 28
doc.: IEEE 802.11-07/0764r0
Submission
The WPA2 certification satisfied the basic security requirements of WLANs
Name
• Wi-Fi Protected Access 2– WPA2 – Personal– WPA2 - Enterprise
Introduced
• September 2004(standard ratified June 04)
Status
• Mandatory as of March 2006
Certifications
• Personal: 1,011 (May 2006)
• Enterprise: 811 (May 2006)
Observations
• WPA2 is based on the CCMP part of 802.11i– Personal is based on PSK– Enterprise is based on 802.1X
Lessons for WFA & IEEE
• It is always better to let security experts design security protocols
• Note: this lesson probably applies to all elements of standards development
May 2007
Andrew Myles (Cisco)
Slide 29
doc.: IEEE 802.11-07/0764r0
Submission
The extended EAP certification tests interoperability for the many common EAP methods
Name
• Extended EAP (Extensible Authentication Protocol)
Introduced
• April 2005
Status
• Mandatory(for Enterprise products)
Certifications
• EAP-TLS: 1,564 (May 2006)
• …
Observations
• Certifies interoperability of:– EAP-TLS– EAP-TTLS/MSCHAPv2– PEAPv0/EAP-MSCHAPv2– PEAPv1/EAP-GTC– EAP-SIM
Lessons for WFA & IEEE
• 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
• Draft 802.11n
Planned
• June 2007
Status
• Optional
Certifications
• Draft 80211n based on D2.0
• Handheld and CE profile (2008?)
• Ratified 802.11n (2008?)– Hopefully backward compatible
Observations
• 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”
90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08
Start
11-1997 11-1999 11-2003 11-200711a
11d11g11h
11i
11e11k
11b
11n
11p
11w
11j
11r
11s
11u
11y
Delighted to be connected
Delighted to besecurely connected
Demanding managed, reliable & secure
connections anywherewith high performance
for any application
11v
09
In development
Scheduled
Ratified
May 2007
Andrew Myles (Cisco)
Slide 48
doc.: IEEE 802.11-07/0764r0
Submission
However, the objective evidence suggests the 802.11 WG has not been so successful in recent times
• No 802.11 amendments have been ratified since 2005 and only one is possible in 2007
• The last “useful to customers” amendment was arguably ratified as far back as 2004
• Development of recent 802.11 amendments is taking too long; about twice as long as ratified amendments
• The increasing number of parallel 802.11 amendments increases risks arising from complexity
May 2007
Andrew Myles (Cisco)
Slide 49
doc.: IEEE 802.11-07/0764r0
Submission
No 802.11 amendments have been ratified since 2005 and only one is possible in 2007
0
1
2
1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
Rat
ifica
tions
by
year
11k?
May 2007
Andrew Myles (Cisco)
Slide 50
doc.: IEEE 802.11-07/0764r0
Submission
The last “useful to customers” amendment was arguably ratified as far back as mid 2004
2003 2004 2005 2006 2007
11h (Sept 2003)• Only tiny fraction used
for spectrum manage.• A building block for
future amendments
11j (June 2004)• Mostly not
implemented• A building block for
future amendments
11e (Sept 2005)• Mostly not
implemented• Arguably incomplete• WMM just rampingL
ess
use
ful
11g (June 2003)• Wildly successful in
the market place
11i (June 2004)• Required for the
market place to even existU
sefu
l
today
May 2007
Andrew Myles (Cisco)
Slide 51
doc.: IEEE 802.11-07/0764r0
Submission
Development of recent 802.11 amendments is taking too long; about twice as long as ratified amendments
In development
Approved
May 2007
Andrew Myles (Cisco)
Slide 52
doc.: IEEE 802.11-07/0764r0
Submission
The risks associated with complexity are increasing along with the number of parallel amendments
Note: excluding rollups and recommended practices, eg 11F, 11ma/mb, 11T
May 2007
Andrew Myles (Cisco)
Slide 53
doc.: IEEE 802.11-07/0764r0
Submission
More subjective evidence also suggest some standards development issues for the industry
“Hallway” comments suggests that at least people believe:
• 802.11 standards are often “bloated” with unused or broken features
• 802.11 standards reflect political compromise too often, and not the proven needs of the market
• 802.11 standards look like “the house that Jack built”, making further development increasingly difficult
• 802.11 are losing the simplicity that made them so successful in the first place
• 802.11 standardisation process is too slow
• …
May 2007
Andrew Myles (Cisco)
Slide 54
doc.: IEEE 802.11-07/0764r0
Submission
The traditional model of throwing standards & certifications “across the wall” no longer works
“Feature bloat” “Differentiated features”“Minimal features”
Standardsgroup
VendorsIndustryassociation
• 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]