RE: SUB11 COMMENT: stds-802-16: Sub11: Functional Requirements Call-for-Comments

[David Trinkwon <trinkwon@compuserve.com>]

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Insert after "packet and other services" the words "to individual residential,
SME, SOHO and tele-commuter end-user locations.

[Reason for Edit]
To more fully reflect the purpose of the PAR and to differentiate 802.16.3
from other 802 air interfaces.


[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Replace "at least one subscriber station" with " a large number of
end-user locations"

[Reason for Edit]
This is the defining characteristic of 802.16.3 FWA/BWA solutions.
Also, the word "subscriber" implies a billable public service whereas
 some end user services will be corporate extranet, VPN or private
network extensions, not "billable" in the conventional sense.
Also, the word Station implies a single customer termination whereas
most of the likely applications will be multi-line / multi-service.
The air interface delivers an access "pipe" to a location over which
services can be delivered to one or more end-user ports or terminal points.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Insert new paragraph :

"The critical parameters for serving these markets using wireless access
technology is the combination of coverage / capacity factors that affects
access cost per user, the deployability, maintainability and product costs
 associated with the customer premise installation, and the spectrum
efficiency / reuse for economically serving the required number of customer
locations with a minimum number of base station locations and backhaul routes "

[Reason for Edit]
To capture the essence of the key challenge for a commercially viable /
successful BWA solution for the 802.16.3 target markets.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Insert "Telecommuters" between "SOHO" and "small businesses" .
Proposal : To invite contributions on definitions of these terms and associated
traffic model assumptions, demographic density / distibution criteria and
typical clutter / propagation implications.

[Reason for Edit]
These have specific traffic / service / revenue characteristics which need
to be taken into account when determining the capacity, efficiency,
availability and other characteristics of the air interface.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
replace second / subsequent sentences with "In accordance with ITU-R 
definitions,
FWA (and hence BWA) provides access to one or more (public and private)
core networks, rather than forming and end-to-end communication system.
802.16.3 systems serve fixed location customers, but who might be 
geographically
or re-locatable or even nomadic (but not mobile).

[Reason for Edit]
To align the requirement with established ITU and FWA terminolology / practice.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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grammar, etc.]
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[Detailed Description of Proposed Insertion, Deletion, Change]
Replace "at least one subscriber station" with " a large number of
end-user locations"

[Reason for Edit]
This is the defining characteristic of 802.16.3 FWA/BWA solutions.
Also, the word "subscriber" implies a billable public service whereas
 some end user services will be corporate extranet, VPN or private
network extensions, not "billable" in the conventional sense. Also,
the word Station implies a single customer termination whereas most
of the likely applications will be multi-line / multi-service.
The air interface delivers an access "pipe" to a location over
which services can be delivered to one or more end-user ports
or terminal points.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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4

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grammar, etc.]
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[Detailed Description of Proposed Insertion, Deletion, Change]
Replace "NLOS" with "Non Line-of-Sight, Near Line-of-Sight and
Line-of-Sight

[Reason for Edit]
The commercial objective (already achieved by some conventional FWA systems)
is Non Line-of-Sight, especially in shorter range urban / cluttered 
environments.
Near LOS and pure LOS is commercially tolerable / preferable in suburban and 
rural deployments where range or propagation through foliage is more critical.
The air interface must be able to cope with all three types of deployment,
simultaneously if possible.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Insert "regulatory" in front of "and atmospheric conditions".

[Reason for Edit]
Regulatory restrictions on bandwidth, power, coexistence, sharing and other
licensing criteria can significantly affect the air interface, and can vary
from country to country.


[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Insert "or adaptive array (spacial reuse)" between "shaped sector"
and "antenna"

[Reason for Edit]
Spatial reuse will be an important technical; possibility for meeting
the challenging spectral efficiency and economic deployablity criteria
for 802.16.3 target markets.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Delete "highly"

[Reason for Edit]
FWA customer antennae are typically 15 - 30 degree beamwidth to assist
with low cost / complexity deployment processes, especially with a
esirable capabil;ity for customer installability or technicians with
minimal training / skills.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Replace sentence with " Omnidirectional antenna are often used as an initial
(low capacity, low cost) base-station in competitive overlay or rural 
deployments,
but might be enhanced later to sectored configurations to icrease capacity or
range as customer penetration / loadingsor distances dictate. It might also be
necessary to reconfigure coverage from a single "Super-cell" to a multi-cell
coverage plan at some point in the life of a base station, while minimising
the number and cost of customer units wjich need re-pointing or 
re-installation.

[Reason for Edit]
802.16.3 deployments are nothing like conventional mobile or LMDS-like
coverage / deployment plans, and special measures must be taken to ensure
the lowest cost configuration at differing / evolving points in the evolution
of the access network and its associated businesses.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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5

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[Detailed Description of Proposed Insertion, Deletion, Change]
Replace "are" with "might be"

[Reason for Edit]
Omni-Directional and adaptive array antenna confugrations are equally probable
in future FWA/BWA deployments, for economic and deployablity / capacity
management reasons.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Insert "might" between "and" and "even".

[Reason for Edit]
This is implementation dependent, and can change.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Amend Figure 2-2 to show :

a) Local Power within the SS box, supplying the IDU and ODU.
b) Multiple ODU's per IDU at the BS

c) Remote IDU's from the BS IDU. These Remote units / antenna would be located
 away from the BS site to improve coverage / economics in range or capacity 
limited deployments.

d) The BS IDU might not be l;ocated at the BS - it might be at another location
(which might be the same as the public switch / router)

e) The switch / router might not be public - it might be a private / corporate
edge device which might, or might not have public network gateways / 
connections
 behind it.

[Reason for Edit]
To reflect economic / service characetristics of the 802.16.3 target markets
and existing FWA practice / experience in many countries.


[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
a) Delete "within a channel"  (Line 26) and "more than one subscriber could 
share a downstrean channel" (Lines 27,28)

b) Delete "if subscriber stations share a channel" (Lines 28,29)

c) Change "bandwidth" to "capacity" (Line 31)

[Reason for Edit]
In FWA/BWA for the 802.16.3 target markets, customer units are always in
contention for capacity / bandwidth (not channels in the frequency or
radio sense). Not all downstream methods are "broadcast" - beamforming
techniques can address individual customers for improved simultaaneous
frequency reuse within the same cell.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Change to "(supporting FAX and analog modem services)"

[Reason for Edit]
Customers will continue to have / use analog modems over any presented
"voice" port / circuit. The air interface might need to dynamically allocate
 approporiate resources to accommodate the modem transmissions at up to V.90 
rates.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Add "including always on, ad hoc and on-demand communication in either or both
directions "

[Reason for Edit]
This ha simportant connotations for non-circuit oriented concentrated air
interface access systems, and will be increasing important to support alerts,
telemetry and appliance / control functions in residential and small
business environments.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Figure 4-1 : Change "Auto / Video" to "Audio / Video"

Change "DAVIC" to "DAV TC"

[Reason for Edit]
Typo


[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Replace "In the downstrean direction ? more than one subscriber station" with

"Since customer units will contend for capacity to/from one or more base 
stations,

[Reason for Edit]
To reflect the deployment, capacity management and economic characteristics
for the 802.16.3 target markets.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Add "in particular, the activities being carried out within the Joint
Rapporteur Group (JRG) 8A/9B  (with references etc)

[Reason for Edit]
To draw specific attention to this important group.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Change "subscriber station" to "residential or SME customer location"

[Reason for Edit]
Clarification

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Change "foliage" to "reflections and foliage"

[Reason for Edit]
Completeness

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
BER should be changed from 10e-9 to 10e-6 or 10e-7 in accordance with
ITU FWA recs (see JRG8a/9B inputs)

[Reason for Edit]
10e-9 is typical; for feeder links and trunk facilities for T1-T3 CBR pipes.
It is not typical / necessary / economic for distribution / access connections
to residential; / SME customers, or packet-based links / services.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Delete 'channel"

[Reason for Edit]
802.16.3 links might not be "channel" oriented (e.g OFDM or CDMA)

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Repalce Bullets with :

Bullet : Radio Range, width of sector(s) and/or adaptive array parameters
Bullet : Upstream / downstream link and user rates / asymmetry/ dynamics
Bullet : Types of Duplex (FDD, TDD, Paired TDD)
Bullet : Types of Modulation / Multiple Access (DS,SS etc, TDMA, CDMA, FDMA,
SDMA or combinations)

[Reason for Edit]
To differentiate from traditional 802.16.1 concepts and embrace traditional
plus emerging FWA practices / experiences.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
This needs further elaboration / discussion / contribution. Power control loops
 are probably fundamental for most FWA / customer unit applications and it must
 not be possible to exceed a maximum permitted power level. Also, if a SU is
"shut down" it must be possible to re-enable it (without visiting the customer
location) to diagnose and fix / dispatch etc. There are also functions 
necessary
 to handle Primary / secondary power conditions, software downloads/ upgrades,
perfotmance and error statistics, and to re-ptogram the allowed base station /
channel lists for a given SU - or all Sus in a given area / subset of criteria.

[Reason for Edit]
Expand the requirement to better match the needs of the 802.16.3 target 
markets.

[Submitter's Last Name]
Trinkwon

[Submitter's First Name]
David

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[Detailed Description of Proposed Insertion, Deletion, Change]
Needs further expansion / contribution to handle installation, service
suspend/resume, relocation, geolocation and anti-cloning processes.

[Reason for Edit]
To better match the needs for the 602.16.3 target markets.