Re: stds-80220-requirements: Comments on 802.20 SRD Rev 8b - for discussion on the Oct-23-03 C all
Hi Dan
In response to your notes below regarding section 4.1.2 please see my follow on email.
I just wanted to change the subject header to make things easier for the editor.
Mike
On Thu, Oct 23, 2003 at 04:23:58PM -0400, Gal, Dan (Dan) wrote:
> The following are comments and text change proposals for incorporation in the next revision of IEEE 802.20 SRD (System Requirements Document) rev 8b:
>
> Regards,
>
> Dan Gal
> Lucent Technologies O
>
>
>
> ----------------------------------------------------------------------------------
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> Section 3.1 : System Architecture
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> Current text: "The 802.20 system must be designed to provide ubiquitous broadband wireless access in a cellular architecture."
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> New text: "The 802.20 system shall be designed to provide ubiquitous broadband wireless access in a cellular architecture and be capable of reusing existing infrastructure."
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> Rationale: align with the requirements of the PAR (see "Cell Sizes" item in the table in section 1.3)
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> -------------------
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> Section 4.1.12 - Antenna Diversity
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> Proposal: delete the section.
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> Rationale: Redundant requirement. Section 4.1.11 covers it all.
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> ------------------
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> Section 4.1.2 - Spectral Efficiency
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> Current text: "
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> Editors Note: Michael Youssefmir to supply definition of expected aggregate throughput for Appendix B.
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> Sustained spectral efficiency is computed in a loaded multi-cellular network setting. It is defined
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> as the ratio of the expected aggregate throughput (taking out all PHY/MAC overhead) to all
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> users in an interior cell divided by the system bandwidth. The sustained spectral efficiency
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> calculation shall assume that users are distributed uniformly throughout the network and shall
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> include a specification of the minimum expected data rate/user.
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> [Downlink > 2 bps/Hz/sector]
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> [Uplink >1 bps/Hz/sector]
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>
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> 1. New text:
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> Sustained spectral efficiency is computed in a loaded multi-cellular, three-sector per cell, network setting. It is defined
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> as the ratio of the expected aggregate throughput (taking out all PHY/MAC overhead) to all
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> users in a cell divided by the total spectrum deployed in that cell. The sustained spectral efficiency
>
> calculation shall assume that users are distributed uniformly throughout the network and shall
>
> include a specification of the minimum expected data rate/user.
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> Given the above definition, the minimum spectral efficiency requirements shall be:
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> - Downlink: greater than 6 bps/Hz/cell
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> - Uplink: greater than 3 bps/Hz/cell
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> Rationale: The change reflects recent comments and requests to change the definition to bps/Hz/cell and the need to baseline all proposals on a three-sector cell configuration. Thus, the previous figures were factored by 3.
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> 2. Comment on UL/DL symmetry: The PAR provides just one number (" >1b/s/Hz/cell") - why then aren't the UL and DL figures the same?
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> -----------------------
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> Section 4.1.4 - Support for Different Block Assignments
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> Add the following text at the end of section: "Proposals shall support all block assignments of a given frequency arrangement (FDD, TDD)"
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> Rationale: add clarity to the current text.
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>
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> -------------------------------------------------------------------------------------------------------------------------------------------
>
> Dan Gal
> Lucent Technologies O
> Mobility Solutions
> Wireless Standards Development
> email: dgal@lucent.com
> phone: +1 973-428-7734
>
>