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

[Fred Pook]

Hi Mahabir,
According to the Telecom Regulatory Authority of India
Consultation Paper:
http://www.trai.gov.in/trai/upload/ConsultationPapers/85/Consultation12jun06.pdf

"5.15-5.35 GHz. Presently this band is being used for WiFi
applications on delicensed basis for indoor usage. TRAI has already
recommended in its broadband recommendation for delicensing of this
band for out door usage also along with band 5.725-5.85 GHz. For this
purpose coordination with Department of Space is required so that this
band can be
provisionally delicensed on the basis of non-interference and any possible
interference can be monitored and dealt with even after delicensing."

So that probably means that the Department of Space of India has some
communication equipment in (or near) the 5.725-5.85 GHz maybe
satellite communication.

check also: http://www.geocities.com/dtmcbride/tech/em-spectrum.html
for a short list of the whole EM spectrum

Fred




On 8/5/06, Mahabir Pun <mahabir at himanchal.org> wrote:
> 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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