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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
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