R1-2600142
discussion
Evaluation assumptions on energy efficiency
From Huawei
Summary
This Huawei/HiSilicon contribution presents 14 proposals and 6 observations on energy efficiency evaluation assumptions for 6G Radio (FS_6G_Radio). It addresses both network and device energy saving, covering BS power consumption models (including a new LP-mode), UE power scaling methods, evaluation metrics, and network load levels.
Position
Huawei proposes a Cat. 2-plus BS power consumption model for 6GR that optimizes transition times from existing 5G Cat. 2 (e.g., light sleep to ~100 ms). They introduce a Low Power (LP) mode for BS where only a fraction alpha (0.25 or 0.5) of total TRxU chips/TRxU remain active to transmit additional synchronization signals (SS) and monitor UL-WUS, while the remaining fraction enters deeper sleep states with scaled static power consumption. For network energy saving metrics, they require evaluating FTP-3 traffic against a QoS satisfaction rate defined as the percentage of UEs satisfying Packet Delay Budget (PDB). For UE energy saving, they propose specific relative power unit values for EE processing across different RX numbers and bandwidths, and update the DL bandwidth adaptation scaling model with distinct formulas for PDCCH-only and PDCCH+PDSCH channels, including MaxBW-dependent parameters for different adaptation delays.
Key proposals
- Proposal 1 (Sec 2.1.1): For evaluation purpose, update, as Cat. 2-plus, to the existing 5G Cat. 2 BS power consumption model should be considered with optimized transition time as in Table 1.
- Proposal 1 (Sec 2.1.2): For BS’s low power mode, applying scaling method for both dynamic and static power consumption can be considered for 6GR NES performance evaluation.
- Proposal 3 (Sec 2.1.2): For static power consumption part: [formula with micro sleep and light/deep sleep power consumption].
- Proposal 5 (Sec 2.1.2): [alpha] is the fraction of the total TRxU number for transmission/reception in BS LP-mode, which for simplicity can be 0.25 or 0.5.
- Proposal 1 (Sec 2.1.3): For FTP-3 traffic with PDB requirement, the network energy consumption should be evaluated and compared with a given QoS satisfaction rate.
- Proposal 2 (Sec 2.1.3): QoS satisfaction rate is defined as the percentage of satisfied UEs over the total number of UEs.
- Proposal 1 (Sec 2.1.4): Support to use the following load levels for BS energy efficiency evaluations: Empty load: L = 0%, Low load: 0 < L ≤ 5%, Light load: 5 < L ≤ 15%, Medium load: 15 < L ≤ 35%, High load: L > 35%.
- Proposal 11 (Summary): Besides evaluating overall power consumption considering the traffic model and QoS requirement, when evaluate the UE energy-efficiency, the following three cases focusing on specific aspects of power consumption are also to be investigated at least for calibration purpose: only PDCCH monitoring case during UE connected state, PDSCH/PUSCH case focusing on the power consumption of data transmission or reception, only in IDLE state.
- Proposal 1 (Sec 2.2.1): The suggested values of different RX numbers and BWs for EE processing are {13, 16, 20} for {micro sleep, light sleep, deep sleep} for 5MHz and 2RX, and {11, 12, 16} for {micro sleep, light sleep, deep sleep} for 10MHz and 1RX.
- Proposal 2 (Sec 2.2.1): The suggested values of X4, X5, X6 and X7 for UL power values are 420, 490, 620 and 920, respectively.
- Proposal 1 (Sec 2.2.2): For 6GR UE power evaluation, the scaling model for DL bandwidth adaptation scaling model are updated as following [specific formulas for PDCCH+PDSCH and PDCCH with MaxBW parameters].
- Proposal 2 (Summary): Both Cat. 1 and Cat. 2-plus can be used for BS energy efficiency evaluation of 6GR.
- Proposal 4 (Summary): For dynamic power consumption part: reuse 5G’s scaling method.
- Proposal 6 (Summary): The transition time and the transition energy value of [formula] applies for BS transition to/ from its LP-mode, [formula] is the additional transition energy of the corresponding sleep state.