RE: stds-802-18 FW: <WPAN> 802.18 input contributions on UWB
David,
The papers have been sent to the wireless WGs both as
an FYI and for review and comment in order for us to
have a better view of how the WGs interpret the material
presented.
802.18 will have to see what feedback we get, as well
as considering what's going on in the ITU-R on UWB,
before determining any course of action.
Because the subject of ITU-R studies to determine the
appropriate protection criteria for RLANs is "on the
table" at the ITU-R, I think it's appropriate to ask
802.11 for inputs in the subject.
This does NOT mean that 802.18 is "anti-UWB," but only
that we are responding to the realities of what is
unfolding in the ITU-R.
Regards,
Carl
> -----Original Message-----
> From: Baddeley David-tte001 [mailto:David.Baddeley@motorola.com]
> Sent: Tuesday, November 11, 2003 10:12 AM
> To: Stevenson, Carl R (Carl)
> Cc: 'stds-802-11@ieee.org'; 'stds-802-15@ieee.org';
> 'stds-802-16@ieee.org'; 'stds-802-20@ieee.org'
> Subject: RE: stds-802-18 FW: <WPAN> 802.18 input contributions on UWB
>
>
> Carl,
>
> Are the working groups in fact doing work on this? Isn't
> 802.18 likely to be the place where this will be studied?
>
> I suggest that before 802.18 questions the FCC limits as
> Michael proposes the following should also be considered:
> - below 3.1 GHz is "out-of-band" for the UWB emission
> 802.15.3a requires. As far as device operation is concerned
> it could be filtered arbitrarily low but with cost impact,
> probably to a level below the associated digital circuitry
> emission which is in the EMC regulatory domain. This
> principle is true for any transmitter but a compromise is
> always accepted for what is economically feasible. In 802.11a
> OFDM modulation is specified (by the IEEE) to be 28dB down at
> the adjacent channel centre frequency and 40dB down generally
> beyond 30MHz. This for a transmitter with +30dBm allowed in
> band meaning that it might emit -10 dBm in the 2.4 GHz band.
> A similar argument can be made for 802.11g interference to
> 802.11a. I would not like to see us responsible for opening
> this discussion with regulators on out of band emissions from
> IEEE short range devices generally.
> - UWB receivers will need to avoid 5GHz WLAN interference
> because they could be saturated so 802.15.3a proposals all
> avoid use of the 5-6 GHz band.
>
> Regards,
> David
>
> David Baddeley
> Motorola SPS
> 207 rte de Ferney
> 1218 Grand-Saconnex, Geneva
> Switzerland
> Tel +41 22 7991 216
> GSM: +41 (0)79 3100401
>
>
> -----Original Message-----
> From: Stevenson, Carl R (Carl) [mailto:carlstevenson@agere.com]
> Sent: Monday, November 10, 2003 10:31 PM
> To: stds-802-18@ieee.org
> Subject: stds-802-18 FW: <WPAN> 802.18 input contributions on UWB
> Importance: High
>
>
> FYI, the attached message/docs were sent to the
> wireless WGs for review/comment.
>
> Regards,
> Carl R. Stevenson
> Chair, IEEE 802.18 Radio Regulatory Technical Advisory Group
> 610-965-8799 (home office) 610-712-3217 (fax mailbox)
> 610-570-6168 (cellphone) Short Message Service:
> 6105706168@voicestream.net carl.stevenson@ieee.org
>
>
>
> > -----Original Message-----
> > From: Stevenson, Carl R (Carl)
> > Sent: Monday, November 10, 2003 4:09 PM
> > To: stds-802-11@ieee.org; stds-802-15@ieee.org;
> stds-802-16@ieee.org;
> > stds-802-20@ieee.org
> > Subject: <WPAN> 802.18 input contributions on UWB
> > Importance: High
> >
> >
> > Dear WG folks,
> >
> > The attached documents were input as contributions to 802.18 on UWB
> > coexistence issues.
> >
> > I am forwarding them to the wireless WGs for review and comment.
> >
> > I would strongly encourage the WGs to consider having an ad
> hoc group
> > review these documents and prepare a consolidated set of
> comments to
> > 802.18 on behalf of, and with the approval of, the WG as a
> whole. This
> > would be MUCH more practical for 802.18 to absorb, due to the small
> > size of 802.18, rather than a plethora of individual comments.
> >
> >
> > Regards,
> > Carl R. Stevenson
> > Chair, IEEE 802.18 Radio Regulatory Technical Advisory Group
> > 610-965-8799 (home office) 610-712-3217 (fax mailbox)
> > 610-570-6168 (cellphone)
> > Short Message Service: 6105706168@voicestream.net
> > carl.stevenson@ieee.org
> >
> > <<18-03-0046-00-0000_UK UWB_co-existence_update.ppt>>
> > <<18-03-0049-00-0000_Est_UWB_Interference_Pot_M_Lynch.doc>>
> >
> >
>
--------
This message came from the IEEE P802.15 Mailing List
Info at http://grouper.ieee.org/groups/802/15/