-----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