1. Spectral Efficiency Ad-hoc March 18, 2004

2. Status and Continuation 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 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 consider: Consider 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 configuration[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:[1] The spectral efficiency at different mobility speeds should degrade gracefully. [1][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. ParameterSpectral Efficiency Requirements and Targets DownlinkUplink Required Minimum Desirable Target Required Minimum Desirable Target Spectral Efficiency (b/s/Hz/sector) 1.22.40.61.2

4. Option 1 and 1a Comparison ParameterSpectral Efficiency Requirements and Targets DownLinkUplink Required Minimum Desirable Target Required Minimum Desirable Target Spectral Efficiency (b/s/Hz/sector) 1.22.40.61.2

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 configuration[1] 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.[1] [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.

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 1.25 MHz. @ 3km/hr 1.25 MHz. @ 120km/hr5 MHz.@ 3km/hr 5 MHz. @ 120 km/hr DLULDLULDLULDLUL Spectral Efficiency (b/s/Hz/sector) 2.01.0 0.752.01.0 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. ParameterSpectral Efficiency Requirements and Targets DownlinkUplink 3 km/hr120 km/hr3 km/hr120 km/hr Spectral Efficiency (b/s/Hz/sector) 2.01.0 0.75

8. Option 3a (Values TBD) ParameterSpectral Efficiency Requirements and Targets DownlinkUplink 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] 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.

9. Parameter Spectral Efficiency Requirements and Targets Upper Limits to proposed values DownlinkUplink 3 km/hr120 km/hr3 km/hr120 km/hr Spectral Efficiency (b/s/Hz/sector) 2.01.0 0.75 Parameter Spectral Efficiency Requirements and Targets “Estimate” of lower limit of proposed values DownlinkUplink 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] Working Tables for Option 3a