RE: stds-80220-requirements: Antenna Diversity Requirement, 4.1.12
I believe a similar situation exists for FDD systems as well where having
multiple antennas on the mobile terminal ought not to be mandatory becuase
of form factor, cost and processing considerations. This sentiment is also
expressed in Section 4.1.13 of the rev 6 doc reproduced below. Also,
instead of diversity, a broader term such as "multi-antenna processing"
might be more appropriate since it encompasses the use of other techniques
as well.
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"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.
Action: Change to !§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.!¨
Rationale: This requirement is a vendor specific implementation requirement,
and not related to the MAC/PHY Also this material was not introduced with a
rationale. In fact, Rev3 of the document contained the text !§Antenna
diversity shall not be a requirement of the mobile station.!¨ We should
leave it up to vendors/operators who understand the cost/form factor
tradeoffs whether they support user terminal diversity. For example, there
is a wide variety of 802.11 cards some have diversity/some do not."
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Therefore, proposed new text for this section:
"The base station shall provide support for multiple antenna processing."
Rationale: same as above
Thanks,
Samir
-----Original Message-----
From: shigeru kimura [mailto:shigeru_kimura@csg.kyocera.co.jp]
Sent: Friday, August 08, 2003 3:05 AM
To: Sheikh, Khurram P [GMG]; 802-20 IEEE requirements list
Cc: Shigeru_Kimura@csg.kyocera.co.jp
Subject: RE: stds-80220-requirements: Antenna Diversity Requirement, 4.1.12
Dear Khurram-san
I consider many kinds of Mobile Terminals.
Some kinds of mobile terminal will not require to achieve high
performance up
to 250km/h.
High end terminal will have two or more antenna diversity to achieve
high performance up to 250Km/h.
Single antenna may be enough for low end terminal in case of TDD System.
So single antenna option may be important for TDD system.
Thank you.
Kimura
"Sheikh, Khurram P [GMG]" <khurram.p.sheikh@mail.sprint.com> 2003/08/08
13:18:49
宛先: "shigeru kimura" <shigeru_kimura@csg.kyocera.co.jp>, "802-20 IEEE
requirements list" <stds-80220-requirements@ieee.org>
cc:
件名: RE: stds-80220-requirements: Antenna Diversity Requirement, 4.1.12
Dear Mr. Kimura
I have to disagree with your notion of not putting a minimum requirement
on antenna diversity. Current generation systems have these capabilities
in the pipeline, so it seems very illogical not to shoot for higher
performance by putting at least a minimum requirement for antenna
diversity.
Bets Regards
Khurram P. Sheikh
Chief Technology Advisor
Sprint- Broadband Wireless
Tel (SM): 650-513-2056
Tel(KC): 913-762-1645
Mobile: 650-906-8989
khurram.p.sheikh@mail.sprint.com
-----Original Message-----
From: shigeru kimura [mailto:shigeru_kimura@csg.kyocera.co.jp]
Sent: Thursday, August 07, 2003 10:23 PM
To: 802-20 IEEE requirements list
Cc: Shigeru_Kimura@csg.kyocera.co.jp
Subject: stds-80220-requirements: Antenna Diversity Requirement, 4.1.12
Dear ALL
This is Shigeru Kimura.
I want to propose to remove the section 4.1.12 of Rev 5.
Section 4.1.12 - Antenna Diversity
Current text
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.
Proposed New text
N/A(Delete section)
Rationale
Support for multiple antenna capability is described section 4.1.11.
Section 4.1.12 defines a minimum antenna number for
Base Station and Mobile Terminal.
There is a contradiction between 4.1.11 and 4.1.12.
Only section 4.1.11 description is enough for multiple antenna
capability I
think.
And the antenna number of Mobile Terminal should not be defined in the
Requirements Document.
The important thing is the system performance with cost.
Thank you.
Kimura