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