RE: stds-80220-requirements: 802.20 Requirements: 4.1.11 Antenna Diversity
John,
Walter,
Your arguments about the economics of deploying diversity do not address
the issue at hand. Many people agree that different markets have different
requirements and the added cost of diversity may not be appropriate or
necessary
for all markets. Certainly, as an operator, you can require that your
equipment
vendors implement receive diversity in their base stations and/or mobile
stations. It doesn't seem either appropriate or necessary for the standard
to mandate receive diversity, particularly in the mobile terminal. If the
economics are as you suggest, then it will certainly be available without
having to mandate it in the standard. My preference would be to either
delete
this section or to use the following which is close to one of the options in
the
document:
The Base Station should provide antenna diversity, which may be
an integral part of an advanced antenna solution. Antenna diversity
shall not be a requirement of the mobile station.
Best regards,
Joanne
-----Original Message-----
From: owner-stds-80220-requirements@majordomo.ieee.org
[mailto:owner-stds-80220-requirements@majordomo.ieee.org]On Behalf Of
Humbert, John J [NTWK SVCS]
Sent: Thursday, November 06, 2003 1:46 PM
To: Michael Youssefmir; Rausch, Walter F [GMG]
Cc: ! Stds-80220-Requirements (E-mail)
Subject: RE: stds-80220-requirements: 802.20 Requirements: 4.1.11
Antenna Diversity
The economics of deploying diversity are very positive just look at the
number of air interface technologies that support diversity i.e. CDMA,
GSM, IS-136.
John J. Humbert
6220 Sprint Parkway
Mailstop KSOPHD0504 - 5D276
Overland Park, KS 66251-6118
PCS (816) 210-9611
-----Original Message-----
From: owner-stds-80220-requirements@majordomo.ieee.org
[mailto:owner-stds-80220-requirements@majordomo.ieee.org] On Behalf Of
Michael Youssefmir
Sent: Thursday, November 06, 2003 10:10 AM
To: Rausch, Walter F [GMG]
Cc: ! Stds-80220-Requirements (E-mail); Michael Youssefmir
Subject: Re: stds-80220-requirements: 802.20 Requirements: 4.1.11
Antenna Diversity
Hi Walter,
I now undertsand what your preface "At a minimum" means. Essentially
you are mandating receive diversity. So I think we are back to square
one on this issue. As the current revision of the document shows
there is substantial disagreement in the wider group on this topic.
I don't see how your new text really resolves any of this. I will
just reiterate my opposition for any requirement that mandates the use
of diversity (specifically at the user terminal) for the reasons
stated in our previous lengthy discussion: Market needs vary for
many reasons in different places and with different market
segments, often requiring tradeoffs between performance, cost and other
factors like terminal size. Therefore, terminals with single antennas
should be allowed.
Mike
On Thu, Nov 06, 2003 at 09:06:25AM -0600, Rausch, Walter F [GMG] wrote:
> Mike,
>
> In 4.1.11, prefaced the requirement statement with, "At a minimum", as
an encouragement to all manufacturers to provide as robust an airlink as
possible. Stated this way, any standards compatible AI will at least
offer RX diversity, but no vendor is prevented from providing more
advanced techniques.
>
> Section 4.1.10 remands manufacturers to provide attachment points
within the PHY/MAC for the use of advanced antenna technologies, either
within his own product offering, or as upgrades at some future date.
Such upgrades may be provided by third parties, and may use techniques
that were unavailable when the original equipment was manufactured.
>
> Walter Rausch
>
> -----Original Message-----
> From: Michael Youssefmir [mailto:mike@arraycomm.com]
> Sent: Wednesday, November 05, 2003 8:34 PM
> To: Rausch, Walter F [GMG]
> Cc: ! Stds-80220-Requirements (E-mail); Michael Youssefmir
> Subject: Re: stds-80220-requirements: 802.20 Requirements: 4.1.11
> Antenna Diversity
>
>
> Hi Walter,
>
> I have a couple comments regarding your proposed text:
>
> > 4 .1.11 Antenna Diversity
> > At a minimum, the Air Interface shall provide support for receive
diversity.
>
> I think we should remove the text "At a minimum" as it provides
> little information.
>
> Also can you please clarify your proposal itself. For example, it is
> not completely clear what is being mandated and how this contributes
> more beyond section 4.1.10:
>
> 4.1.10 Support for Multi Antenna Capabilities (Closed)
>
> Interconnectivity at the PHY/MAC will be provided at the Base Station
and/or the Mobile Terminal for advanced multi antenna technologies to
achieve higher effective data rates, user capacity, cell sizes and
reliability. As an example, MIMO.
>
> Mike
>
>
> On Fri, Oct 31, 2003 at 02:55:11PM -0600, Rausch, Walter F [GMG]
wrote:
> >
> > 802.20 Requirements: 4.1.11 Antenna Diversity
> >
> >
> > Current Text (and comments)
> >
> >
> >
> >
> >
> > Editors Note: there are two versions of this section and there are
numerous proponents for deleting this section. <?xml:namespace prefix =
o ns = "urn:schemas-microsoft-com:office:office" />
> >
> > At a minimum, both the Base Station and the Mobile Terminal shall
provide two element diversity. Diversity may be an integral part of an
advanced antenna solution.
> >
> >
> >
> > The Base Station shall provide antenna diversity. Diversity may be
an integral part of an advanced antenna solution. Antenna diversity
shall not be a requirement of the mobile station.
> >
> >
> >
> > Proposed Text change.
> >
> > 4 .1.11 Antenna Diversity
> >
> >
> > At a minimum, the Air Interface shall provide support for receive
diversity.
> >
> > Rational
> >
> > Multiple antenna diversity at it's simplest provides known gain for
minimal hardware and development efforts. The vendor community is free
to work within these guidelines to provide the most cost-effective
implementation.
> >
> >
> > Walter Rausch
> > Principal Network Evolution Planner
> > Sprint Broadband
> > 6360 Sprint Parkway, Bldg. 5
> > MS: KSOPHE0310-3A350
> > Overland Park, KS 66251
> > walter.f.rausch@mail.sprint.com
> > Voice: 913-762-1598
> > FAX: 913-762-0506
> >
> >
> >
> >
> >