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RE: stds-80220-requirements: Comments on 802.20 SRD Rev 8b - for discussion on the Oct-23-03 C all

Dan,
 
I believe you are making far more out of that PAR statement then was intended by it authors.  I was one
of those who participated in the development of the 802.20 PAR.   You are correct in saying that
the intention was to allow (but not require) the reuse of towers/structures, power plant and etc.  This would
allow co-siting of 802.20 systems at existing cellsites of other wireless networks.   It was not our intent (at
least it was never discussed, so we didn't as a group have the intention) to suggest that the 802.20 standard
should be designed for "swap(ping) out existing wireless technologies ....(and) reusing ... radio operation licenses."
Also, that PAR statement should definitely not be read to mean any of the things you propose, particularly it
should not "be translated to RF performance characteristics such that when an 802.20 based system is deployed
in an existing cell site, its specified performance would be guaranteed in the entire cell's coverage area."   An
802.20 network could be built with some co-siting of cells with other wireless networks and some new cellsites.
This would certainly be the case with systems built in bands in the 2-3.5 GHz range, because for propagation
reasons more sites would be needed than wireless systems operating in the 1-2 GHz range.
 
Best regards,
 
Joanne
 
-----Original Message-----
From: owner-stds-80220-requirements@majordomo.ieee.org [mailto:owner-stds-80220-requirements@majordomo.ieee.org]On Behalf Of Gal, Dan (Dan)
Sent: Friday, October 24, 2003 11:53 AM
To: 'Li Junyi'
Cc: ! Stds-80220-Requirements (E-mail)
Subject: RE: stds-80220-requirements: Comments on 802.20 SRD Rev 8b - for discussion on the Oct-23-03 C all

Junyi,
 
The text you have asked clarification on comes from the IEEE 802.20 PAR document and was authored by members of the MBWA study group that preceded the 802.20 project. Thus, it would be appropriate to also ask the authors to clarify the term "existing infrastructure". My understanding is somewhat influenced by my extensive background that includes cellular systems deployment planning, site acquisition and operations management and thus, the term "existing infrastructure" for me means a substantial part of cell sites' equipment, including the site itself, the antenna tower/structure, the supporting general equipment, the interfaces to the PSTN/PDN etc.  Clearly, the authors of the PAR wanted to paint an attractive prospect of a new wireless technology that could swap out existing wireless technologies at minimal capital investment, reusing existing cell site infrastructure and radio operation licenses. I view this PAR text as an important requirement that has to be translated to RF performance characteristics such that when an 802.20 based system is deployed in an existing cell site, its specified performance would be guaranteed in the entire cell's coverage area. Obviously, there are several related key specification parameters that need to be explicitly defined in the 802.20 SRD so that we meet this requirement. In the absence of such specifications, the evaluation criteria document (ECD) must specify target cell sizes in conjunction with channel and propagation profiles for which contending proposals should show how and at what performance level(s) they would operate in these specified cells. An opened-ended approach where nothing of that sort is specified is highly inadequate.
 
 
Regards,
 
Dan
 
 
 
-----Original Message-----
From: Li Junyi [mailto:Junyi_Li@flarion.com]
Sent: Thursday, October 23, 2003 6:32 PM
To: 'Gal, Dan (Dan)'; ! Stds-80220-Requirements (E-mail)
Subject: RE: stds-80220-requirements: Comments on 802.20 SRD Rev 8b - for discussion on the Oct-23-03 C all

Dan,

 

Could you please clarify the term "existing infrastructure" in the requirement of "The 802.20 system shall be designed to provide ubiquitous broadband wireless access in a cellular architecture and be capable of reusing existing infrastructure"? Is there any common "existing infrastructure" to every operator?

 

Thanks,

 

Junyi Li

 

 

-----Original Message-----
From: Gal, Dan (Dan) [mailto:dgal@lucent.com]
Sent: Thursday, October 23, 2003 4:24 PM
To: ! Stds-80220-Requirements (E-mail)
Subject: stds-80220-requirements: Comments on 802.20 SRD Rev 8b - for discussion on the Oct-23-03 C all

 

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

 

----------------------------------------------------------------------------------

 

 

Section 3.1 :  System Architecture

Current text:  "The 802.20 system must be designed to provide ubiquitous broadband wireless access in a cellular architecture."

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."

Rationale:  align with the requirements of the PAR (see "Cell Sizes" item in the table in section 1.3)

-------------------

Section 4.1.12 - Antenna Diversity

Proposal:  delete the section.

Rationale: Redundant requirement. Section 4.1.11 covers it all.

------------------

Section 4.1.2 - Spectral Efficiency

Current text: "

Editors Note: Michael Youssefmir to supply definition of expected aggregate throughput for Appendix B.

Sustained spectral efficiency is computed in a loaded multi-cellular network setting. It is defined

as the ratio of the expected aggregate throughput (taking out all PHY/MAC overhead) to all

users in an interior cell divided by the system bandwidth. 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.

[Downlink > 2 bps/Hz/sector]

[Uplink >1 bps/Hz/sector]

 

1. New text:

Sustained spectral efficiency is computed in a loaded multi-cellular, three-sector per cell, network setting. It is defined

as the ratio of the expected aggregate throughput (taking out all PHY/MAC overhead) to all

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.

Given the above definition, the minimum spectral efficiency requirements shall be:

-  Downlink: greater than  6 bps/Hz/cell

-  Uplink: greater than  3 bps/Hz/cell

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.

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? 

-----------------------

Section 4.1.4 - Support for Different Block Assignments

Add the following text at the end of section:  "Proposals shall support all block assignments of a given frequency arrangement (FDD, TDD)"

Rationale: add clarity to the current text.

 

-------------------------------------------------------------------------------------------------------------------------------------------

Dan Gal
Lucent Technologies O
Mobility Solutions
Wireless Standards Development
email: dgal@lucent.com
phone: +1 973-428-7734