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Summary of Agreements by Topic

Evaluation Methodology

1. General Methodology:
• Evaluation metrics requiring beam area will assume a beam area of 1415 km².
• Pre-processing SINR will be used instead of pre-processing SNR for connection density evaluations.
• Elevation angle of 90° is used for determining mean and standard deviation values of K-factor and delay spread for NTN TDL-C Rural channel model.
• For mMTC LLS (NR and eMTC), 16-QAM can be used in addition to QPSK for SNR to SE mapping.
• All beams are considered for computing the area of connection density.
2. Link Budget Template:
• Target elevation angle is 30°, and link margin (in dB) is included at this angle.
• Receiver interference is included in the link budget template, reusing average INR results from TR 38.821 (4.4 dB for FRF3 DL, 7.6 dB for FRF3 UL).
• Average SNR values are reported for each channel and scenario, not individual company values.
3. Retransmissions for HRC-s:
• SNR values are averaged across submissions.
• Transmission bit rate and spectral efficiency are calculated assuming 4 transmissions (4 kbps, 0.022 bps/Hz).
4. Energy Efficiency:
• Text on energy efficiency from TR 37.910 is reused for TR 37.911, considering only 15 kHz subcarrier spacing.

Self-Evaluation Results for NR NTN

1. Peak Spectral Efficiency:
• Downlink peak spectral efficiency: 3.71 bit/s/Hz (Requirement: 3 bit/s/Hz).
• Uplink peak spectral efficiency: 1.85 bit/s/Hz (Requirement: 1.5 bit/s/Hz).
2. Peak Data Rate:
• Downlink peak data rate: 111 Mbit/s (Requirement: 70 Mbit/s).
• Uplink peak data rate: 2.67 Mbit/s (Requirement: 2 Mbit/s).
3. Mobility:
• NR NTN fulfills mobility requirements under 250 km/h:
• FRF1: Normalized traffic channel link data rate = 0.07 bit/s/Hz; Residual decoded packet error ratio = 0.18%.
• FRF3: Normalized traffic channel link data rate = 0.14 bit/s/Hz; Residual decoded packet error ratio = 0.33%.
4. Reliability:
• Downlink reliability:
• FRF1: 99.98% (Requirement: 99.9%).
• FRF3: 99.96% (Requirement: 99.9%).
• Uplink reliability:
• FRF1: 99.97% (Requirement: 99.9%).
• FRF3: 99.97% (Requirement: 99.9%).
5. Connection Density:
• 1 message/day/device:
• FRF1: 7205 connections/km² (Requirement: 500 connections/km²).
• FRF3: 27357 connections/km² (Requirement: 500 connections/km²).
• 1 message/2 hours/device:
• FRF1: 600 connections/km² (Requirement: 500 connections/km²).
• FRF3: 2277 connections/km² (Requirement: 500 connections/km²).

Self-Evaluation Results for IoT NTN

1. Connection Density:
• 10% BLER is the target for throughput for NB-IoT Full Buffer and eMTC Full Buffer.
• Companies to use QPSK-π/4 and BPSK-π/2 in evaluations for NB-IoT Full Buffer.
• Higher connection density values are feasible with unbounded BLER for FRF=1 due to higher spectral efficiency vs SINR.
2. Packet Latency:
• 99th percentile packet latency fulfills the <10 seconds requirement by a large margin.
3. Bandwidth Capture:
• Bandwidth needed by the average result is captured, with a note that the number of users scales up further with higher bandwidth.
4. Terminology:
• IoT NTN is defined as NB-IoT and eMTC satellite access.

Other Agreements

1. Templates:
• Templates for collecting evaluation results for spectral efficiency, user data rate, area traffic capacity, mobility, reliability, and connection density are endorsed.
2. Energy Efficiency:
• Same energy efficiency aspects from terrestrial self-evaluation in TR 37.910 apply to NTN for both network and device sides.
3. Text Proposals:
• Text proposals for TR 37.911 on mobility, reliability, connection density, and energy efficiency are adopted.

This summary captures the key agreements across evaluation methodology, self-evaluation results for NR NTN and IoT NTN, and other related topics.