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Spectral Efficiency Ad-hoc

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The ad-hoc group will meet again Thursday, March 19, 2004 at 7:00 am. In preparation for tomorrow's ad-hoc meeting participants are requested to focus ... – PowerPoint PPT presentation

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Title: Spectral Efficiency Ad-hoc


1
Spectral Efficiency Ad-hoc
  • March 18, 2004

2
Status and Continuation
  • The ad-hoc group will meet again Thursday, March
    19, 2004 at 700 am
  • In preparation for tomorrows ad-hoc meeting
    participants are requested to focus on Option 1a
    and Option 3a to determine their willingness to
    buy in on these options.
  • For Option 3a, slide 9 provides a working table
    for participants to propose values that they find
    acceptable.
  • Participants should socialize their thoughts in
    an attempt to build consensus ahead of the
    meeting.
  • The ad-hoc chair would like to propose an
    additional possible avenue of compromise for
    people to considerConsider including, in Option
    1a, a statement to the effect that The
    evaluation scenario for spectral efficiency shall
    include at least x (e.g. 10) of user terminals
    that are moving at speed of 120km/h and above.

3
Option 1a (No technical change but table has
been simplified and clarified)
  • The system spectral efficiency of the 802.20 air
    interface shall be quoted for the case of a three
    sector baseline configuration1. 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
  • The spectral efficiency at different mobility
    speeds should degrade gracefully.
  • 1Since 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.

Parameter Spectral Efficiency Requirements and Targets Spectral Efficiency Requirements and Targets Spectral Efficiency Requirements and Targets Spectral Efficiency Requirements and Targets
Parameter Downlink Downlink Uplink Uplink
Parameter Required Minimum Desirable Target Required Minimum Desirable Target
Spectral Efficiency (b/s/Hz/sector) 1.2 2.4 0.6 1.2
4
Option 1 and 1a Comparison
Parameter Spectral Efficiency Requirements and Targets Spectral Efficiency Requirements and Targets Spectral Efficiency Requirements and Targets Spectral Efficiency Requirements and Targets
Parameter DownLink DownLink Uplink Uplink
Parameter Required Minimum Desirable Target Required Minimum Desirable Target
Spectral Efficiency (b/s/Hz/sector) 1.2 2.4 0.6 1.2
5
Option 3
  • In this document, the term System Spectral
    Efficiency is defined in the context of a full
    block assignment deployment and is, thus,
    calculated as the average aggregate throughput
    per sector (bps/sector), divided by the spectrum
    block assignment size (Hz)( taking out all
    PHY/MAC overhead).
  • For proposal evaluation purposes, the System
    Spectral Efficiency of the 802.20 air interface
    shall be quoted for the case of a three sector
    baseline configuration1 and an agreed-upon
    block assignment size. 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, QoS and percentage of
    throughput due to duplicated information flow.
  • 1Since 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.

6
Option 3
  • The system spectral efficiency of the 802.20 air
    interface shall be greater than the values
    indicated in table 4-1. The spectral efficiency
    at higher speeds than those shown should degrade
    gracefully.

Parameter Channel Bandwidth Channel Bandwidth Channel Bandwidth Channel Bandwidth Channel Bandwidth Channel Bandwidth Channel Bandwidth Channel Bandwidth
Parameter 1.25 MHz. _at_ 3km/hr 1.25 MHz. _at_ 3km/hr 1.25 MHz . _at_ 120km/hr 1.25 MHz . _at_ 120km/hr 5 MHz._at_ 3km/hr 5 MHz._at_ 3km/hr 5 MHz. _at_ 120 km/hr 5 MHz. _at_ 120 km/hr
Parameter DL UL DL UL DL UL DL UL
Spectral Efficiency (b/s/Hz/sector) 2.0 1.0 1.0 0.75 2.0 1.0 1.0 0.75
7
Option 3m (Format change of table in Option 3 to
align with table in Option 1a)
  • The system spectral efficiency of the 802.20 air
    interface shall be greater than the values
    indicated in table 4-1. The spectral efficiency
    at higher speeds than those shown should degrade
    gracefully.

Parameter Spectral Efficiency Requirements and Targets Spectral Efficiency Requirements and Targets Spectral Efficiency Requirements and Targets Spectral Efficiency Requirements and Targets
Parameter Downlink Downlink Uplink Uplink
Parameter 3 km/hr 120 km/hr 3 km/hr 120 km/hr
Spectral Efficiency (b/s/Hz/sector) 2.0 1.0 1.0 0.75
8
Option 3a (Values TBD)
  • The system spectral efficiency of the 802.20 air
    interface shall be greater than the values
    indicated in table 4-1. The spectral efficiency
    at higher speeds than those shown should degrade
    gracefully.

Parameter Spectral Efficiency Requirements and Targets Spectral Efficiency Requirements and Targets Spectral Efficiency Requirements and Targets Spectral Efficiency Requirements and Targets
Parameter Downlink Downlink Uplink Uplink
Parameter 3 km/h 50/120 km/h 3 km/h 50/120 km/h
Spectral Efficiency (b/s/Hz/sector) 1.2 1.2/0.4 0.6 0.6/0.2
9
Working Tables for Option 3a
Parameter Spectral Efficiency Requirements and TargetsUpper Limits to proposed values Spectral Efficiency Requirements and TargetsUpper Limits to proposed values Spectral Efficiency Requirements and TargetsUpper Limits to proposed values Spectral Efficiency Requirements and TargetsUpper Limits to proposed values
Parameter Downlink Downlink Uplink Uplink
Parameter 3 km/hr 120 km/hr 3 km/hr 120 km/hr
Spectral Efficiency (b/s/Hz/sector) 2.0 1.0 1.0 0.75
Parameter Spectral Efficiency Requirements and Targets Estimate of lower limit of proposed values Spectral Efficiency Requirements and Targets Estimate of lower limit of proposed values Spectral Efficiency Requirements and Targets Estimate of lower limit of proposed values Spectral Efficiency Requirements and Targets Estimate of lower limit of proposed values
Parameter Downlink Downlink Uplink Uplink
Parameter 3 km/h 50/120 km/h 3 km/h 50/120 km/h
Spectral Efficiency (b/s/Hz/sector) 1.2 1.2/0.4 0.6 0.6/0.2
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