[wsfii-discuss] Why is 5.725 to 5.8 50 GHz not delicensed for outdoor use?

Sat Aug 5 04:00:51 UTC 2006

Hello Hitesh;

Thanks for the information.

I am doing progress slowly and I am in the right track so far. I hope the
government will dilicense it.

Could you tell as why 5.7 - 5.8 GHz was delicensed only for indoor use?
Does it create interferences if it is used outdoors?

We have used Canopy BH-20 in our network for the backbone. After hat we
are usig 2.4 GHz to distribute to the end-users.

Thanks.

Mahabir

> Hi Mahabir,
> I have little to contribute to what Fred and Vikram have already said .
> However in addition I would also like to add that the 5.7
> GHz spectrum for outdoor use is not delicensed.
> It can be used but only for indoor  use.
> The license for 5.7 GHz for outdoor use costs a lot of
> money running into lakhs of Indian rupees.
> Many ISP's are linking their remote sites wirelessly by
> using
> Properietary systems like Canopy , by Motorola.
> It uses OFDM and gives very accepted performance even
> in harsh weather conditions.
> Canopy still uses 2.4 GHz but needs tweaking for
> integration with traditional 802.11 b/g n/w, maybe you
> could consider this for use , since its a better alternative
> for long distance , effective wireless links without
> interference from other devices using the 2.4 GHz ISM
> band.
>
> I hope you find the information useful.
>
> Regards
> Hitesh Shetty
>
>
>
>
> On 8/4/06, Fred Pook <fredpook at gmail.com> wrote:
>>
>> Hi Mahabir,
>> There is some confusion in the earlier Indian government
>> documentations as to what frequencies are de-licensed, but lately I
>> find more and more mentioned:
>> 5.15 - 5.35 GHz & 5.725 - 5.875 GHz that would follow the US/Canada
>> policy.
>> The following is from:
>> http://www.dot.gov.in/finstatus/PERFORMANCE_BUDGET_2005-06.pdf
>>
>> "To encourage expansion of broadband connectivity at a faster pace, both
>> outdoor and indoor usage of low power Wi-fi and WiMax systems in 2.4
>> GHz–
>> 2.4835 GHz band has been delicensed. The use of low power indoor systems
>> in
>> 5.15 - 5.35 GHz & 5.725 - 5.875 GHz has also been delicensed."
>>
>> These are the specs you will find in 802.11a equipment:
>> 1). US/Canada:12 non-overlapping channels (5.15 ~ 5.35GHz, 5.725 ~
>> 5.825GHz)
>> 2). Europe: 19 non-overlapping channel (5.15 ~ 5.35GHz, 5.47 ~ 5.725GHz)
>> 3). Japan: 4 non-overlapping channels (5.15 ~ 5.25GHz)
>> 4). China : 5 non-overlapping channels (5.725 ~ 5.85GHz)
>>
>> And the following is the Response of ISPAI (Internet Service Providers
>> Association of India) on on the recent Consultation Paper No. 9 of the
>> Telecom Regulatory authority Of India. ISPAI has been lobbying for
>> Open Spectrum for years in India. The response shows deep insights in
>> to the future of wireless broadband as well, recommended reading for
>> all of us worldwide:
>> http://www.trai.gov.in/trai/upload/misc/20/ISPAI.pdf
>>
>> "The government has already de-licensed indoor as well as outdoor
>> usage in the 2.4 – 2.4835 GHz band (paving way for growth of
>> technologies like 802.11b/g and Bluetooth, inter alia). Similarly,
>> 5.150-5.350 GHz & 5.725-5.825 GHz bands have been de-licensed for
>> indoor / in-campus usage paving the way for deployment of technologies
>> like 802.11a and RLAN, etc. Authority's recommendations in this regard
>> have been seminal and we hope that the government would de-license the
>> outdoor usage in the 5.150-5.350 GHz & 5.725 – 5.825 GHz as well, as
>> reiterated by the Authority from time to time."
>>
>> I hope this will help you in your efforts in Nepal,
>> Thanks, Fred
>>
>>
>>
>> On 8/4/06, Vickram Crishna <vvcrishna at radiophony.com> wrote:
>> > Mahabir Pun wrote:
>> > > I am going to have a meeting with top level government officials,
>> who
>> > > regulate the bands. Is ISM band 5.725 to 5.850 GHz band free in
>> India.
>> I
>> > > am tryig to make this band free too. Please let me
>> > > know.
>> > >
>> >
>> > Mahabir
>> >
>> > The band around 5.1 GHz (not 5.725-5.850 GHz) is free to use indoors
>> and
>> > licensing for specific outdoor use is said to be trivial to obtain -
>> one
>> > hears that the WPC (who administers bandwidth in India) is waiting for
>> > public demand before opening up the band to free use.
>> >
>> > Of course, the fact that commercially interesting WiMax uses a similar
>> > band could play some role, with so much money to throw around, as in
>> the
>> > case of the GSM and CDMA bands <folding hands with saintly
>> expression>.
>> > Trials have already begun, and I hope that we will get access to the
>> > results. Interestingly, one location set up for intensive testing
>> > comprises 400 sq km around Pune, on the western edge of the Deccan
>> > plateau, which is currently experiencing the heaviest rainfall in 99
>> > years. The robustness of the hybrid network (WiMax plus WiFi) should
>> be
>> > useful for future reference, a good learning experience.
>> >
>> > ---
>> > Vickram
>> >
>> > _______________________________________________
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>> >
>>
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