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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