-----Original
Message-----
From:
owner-stds-80220-requirements@majordomo.ieee.org
[mailto:owner-stds-80220-requirements@majordomo.ieee.org] On Behalf Of Shively,
David
Sent:
Monday, November 17,
2003 3:06 PM
To:
stds-80220-requirements@ieee.org
Subject: RE:
stds-80220-requirements: Spectral Efficiency (4.1.2)
Regarding these definitions, it should be
clearly understood whether
or not guard bands are accounted for in the
calculation of spectral
efficiency. For UMTS (W-CDMA), the channel
is usually quoted as being
5 MHz wide. In this case the guard bands
have been included. However,
for cdma2000 1X (and IS-95) the channel is
usually quoted as being
1.25 MHz wide which does not include the
necessary guard bands.
I propose the following:
Network Wide Bandwidth: The network wide
bandwidth is the total spectrum in
use by the unique carriers deployed in the
network, including any
required guard bands.
Best regards,
David Shively
-----------------------------------------------------------
Dr. David
Shively
Cingular Wireless
5565 Glenridge Connector, Mail Stop
950
Atlanta, GA 30342
Phone: 404 236
5909
Mobile: 404 285 5731
FAX: 404 236
5949
email:
david.shively@cingular.com
pager:
dshively@imcingular.com
-----Original Message-----
From: Humbert, John J
[NTWK SVCS] [mailto:JHumbe01@sprintspectrum.com]
Sent: Monday, November 17,
2003
12:08
PM
To:
stds-80220-requirements@ieee.org
Cc: mike@arraycomm.com
Subject: stds-80220-requirements:
Spectral Efficiency (4.1.2)
Below is the latest version of the text that was
developed at the Plenary in Albuquerque along with a list of the open issues for this
section.
*
4.1.2 System Spectral Efficiency (b/s/Hz/sector)
* The system
spectral efficiency of the 802.20 air interface shall be quoted for the
case of a three sector baseline configuration [Footnote 1]. It shall be
computed in a loaded multi-cellular network setting, which shall be
simulated based on the methodology established by the 802.20 evaluation
criteria group. It shall consider among other factors a minimum expected
data rate/user and/or other fairness criteria, and percentage of
throughput due to duplicated information flow. The values shall be
quoted on a b/s/Hz/sector basis. The system spectral efficiency of the
802.20 air interface shall be greater than X b/s/Hz/sector.
* Footnote
1: Since the base configuration is only required for the purpose of
comparing system spectral efficiency, proposals may submit deployment
models over and beyond the base configuration.
*
Definition:
* System
spectral efficiency - System spectral efficiency is defined as the ratio
of the aggregate throughput (bits/sec) to all users in the system
divided by the network wide bandwidth (Hz) and divided by the number of
sectors in the system.
* Aggregate
Throughput: Aggregate throughput is defined as the total throughput to
all users in the system (user payload only).
* Network
Wide Bandwidth:The network wide bandwidth is the total spectrum in use
by the unique carriers deployed in the network.
* Open items
- Single
value vs. multiple for uplink and downlink
- X
bits/sec/Hz [note 1 b/s/Hz -or- downlink > 2 b/s/Hz/(cell or sector?)
@ 3km/hr ;uplink > 1 b/s/Hz/(cell or sector?) @ 3
km/hr].
- Actual
values of spectral efficiency at higher speeds
- TDD/FDD
John J. Humbert
6220 Sprint Parkway
Mailstop KSOPHD0504 -
5D276
Overland Park, KS 66251-6118
PCS (816)
210-9611