doc.: ieee 802.11-00/106 approved by 802.11 and 802.15 may 2000 vic hayes, lucent technologiesslide...
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![Page 1: Doc.: IEEE 802.11-00/106 Approved by 802.11 and 802.15 May 2000 Vic Hayes, Lucent TechnologiesSlide 1 Copyright, 1996 © Dale Carnegie & Associates, Inc](https://reader036.vdocuments.net/reader036/viewer/2022072015/56649ebe5503460f94bc8393/html5/thumbnails/1.jpg)
May 2000
Vic Hayes, Lucent Technologies
Slide 1
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15Copyright, 1996 © Dale Carnegie & Associates, Inc.
Response to the UK-RA Strawman proposal for the use of RLANs in the 5 GHz bandPresented by Vic Hayes, Ombudsman for Regulatory affairs of IEEE 802
From IEEE 802.11 Standards Working Group for Wireless Local Area Networks
Unanimously approved with 21, 0, 3*), final approval with 13, 0, 1*)
and IEEE 802.15, Standards Working Group for Wireless Personal Area Networks
Unanimously approved with 19, 0, 5*), final approval with 9, 0, 6*)
*) approving, disapproving, abstaining
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May 2000
Vic Hayes, Lucent Technologies
Slide 2
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
• We support the initiative of the UK-RA to change the situation in the 5 GHz band– from an unused allocation
– into one which will shortly bring high data rates in the hands of the work force, educational institutes, the traveler and the home
• We also support the adoption throughout Europe
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May 2000
Vic Hayes, Lucent Technologies
Slide 3
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
100 MHz Spectrum available for 8 + 2 years…. unused
Yet, the Strawman allocates 100 MHz uniquely to HIPERLAN/1 for another 2 years
For what usage? Search on the internet:one announcement for a product in April 1999
no product yet
one website: HIPERLAN/1 allianceevidence of a single meeting in May 1999
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May 2000
Vic Hayes, Lucent Technologies
Slide 4
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Observations supporting removal of HIPERLAN/1
• Spectrum is not used for 8 years– In 1992 Spectrum was assigned for HIPERLAN
(Recommendation T/R 22-06, Madrid 992).
– The standard was published October 1996 as ETS 300 652.
• Standard is available for about 4 years, no products are available yet
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May 2000
Vic Hayes, Lucent Technologies
Slide 5
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Observations supporting removal of HIPERLAN/1
• No products on the market– April 1999 one company announced HIPERLAN/1
product
– To date there is still no product actually available
– There is a single page website with HIPERLAN/1 as title. No products are mentioned.
• Is it really required to reserve 100 MHz of spectrum for another 2 years?
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May 2000
Vic Hayes, Lucent Technologies
Slide 6
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Conclusion for 5150-5250 MHz band
• Restriction of HIPERLAN Type 1 is a continued under-utilization of spectrum
• 802.11 supports addition of 802.11a and HIPERLAN Type 2 and suggests the removal of HIPERLAN Type 1
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May 2000
Vic Hayes, Lucent Technologies
Slide 7
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Suggestion 1
• Remove “HIPERLAN/1” from the 5150-5250 MHz
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May 2000
Vic Hayes, Lucent Technologies
Slide 8
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Proposal to discontinue HIPERLAN/0
• Support from IEEE 802.11 and 802.15 with the proviso that the use of the spectrum is under some level of control to protect against interference from non-high-data-rate applications – This could be done by limiting the use to devices
conforming to recognised standards, with a clear scope of high data rates such as HIPERLAN/2 and 802.11a
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May 2000
Vic Hayes, Lucent Technologies
Slide 9
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Recommendation 1
• Add ”HIPERLAN/2 and IEEE 802.11a” devices to the allocation of the 5150-5250 MHz
• Do a regular review as new standards are published
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May 2000
Vic Hayes, Lucent Technologies
Slide 10
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Licensed Spectrum?• Agree with the considerata of the Strawman proposal
• Agree with the need for licensed spectrum
• But NOT in the 455 MHz allocated to HIPERLAN/2 and 802.11a– removal of the spectrum from the license exempt use will result in
unacceptable performance and thus capacity degrades
– Note that the 455 MHz does include spectrum used by radars. • A typical wideband radar uses more than 100 MHz
– HIPERACCESS is a typical licensed band application which has been moved outside the 5 GHz range
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May 2000
Vic Hayes, Lucent Technologies
Slide 11
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Conserve spectrum for license exempt
– High data rates require a large signal margin and this in turn limits the tolerance for interference – including interference from the same system
– For example, the re-use factor for the 54 Mb/s mode range is 67 – which means that 67 channels are needed to achieve the full 54 Mb/s on each channel in an arbitrarily large system
– If there are fewer channels the interference among channels will be larger and the maximum data rate can not be achieved
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May 2000
Vic Hayes, Lucent Technologies
Slide 12
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Conserve spectrum for license exempt
– Therefore a large number of channels is needed to assure adequate capacity in high density systems
– The current 18 channels are about enough for most situations but we are at the cusp of the performance curve and further reduction will result in unacceptable performanceNOTE:HIPERLANs have always been positioned
as user owned and consequently operated in license exempt spectrum
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May 2000
Vic Hayes, Lucent Technologies
Slide 13
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Conserve spectrum for license exempt
• band partitioning is per definition wasteful - notably in short range systems like wireless LANs: – in many cases, the “licensed“ spectrum would go
unused even though there is an operator in place but have no customers
– the places where an operator may want to provide services is not necessarily one where the private use is very dense. So, partitioning for these reasons leads to unused spectrum
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May 2000
Vic Hayes, Lucent Technologies
Slide 14
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Alternative to licensed service• A better way may be found to give service
providers some priority to use certain channels – for instance by allowing them NOT to employ DFS (whereas user owned and operated systems would be required to employ DFS)
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May 2000
Vic Hayes, Lucent Technologies
Slide 15
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Recommendation 2
• Allocate the entire band 5470-5725 MHz to licensed exempt
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May 2000
Vic Hayes, Lucent Technologies
Slide 16
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Summary
• Add ”HIPERLAN/2 and IEEE 802.11a” devices to the allocation of the 5150-5250 MHz
• Suggest removal of “HIPERLAN/1” from the 5150-5250 MHz band
• Do a regular review as new standards are published
• Allocate the entire 5470-5725 MHz band to licensed exempt
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May 2000
Vic Hayes, Lucent Technologies
Slide 17
doc.: IEEE 802.11-00/106
Approved by 802.11 and 802.15
Proposed Band plan
Band Use5150-5250 MHz HIPERLAN Type 1, HIPERLAN Type 2 and
IEEE 802.11a, for indoor systems only, licenceexempt. Max EIRP 200mW. The use ofHIPERLAN Type 1 to be reviewed after two years
5250-5350 MHz HIPERLAN Type 2/IEEE 802.11a, for indoorsystems only, licence exempt. Max EIRP 200mW
5470-5570 MHz HIPERLAN Type 2/IEEE 802.11a, licenceexempt. Outdoor and indoor systems. Max EIRP1W
5570-5725 MHz HIPERLAN Type 2/IEEE 802.11a, , outdoor andindoor systems, licence exempt. Max EIRP 1W
5725-5875 Low power devices, licence exempt. Max EIRP25 mW