R1-2508995
discussion
Discussion on energy efficiency
From HONOR
Summary
This HONOR contribution to 3GPP RAN1 #123 discusses 6G energy efficiency, presenting 9 Observations and 15 Proposals. The document analyzes lessons from 5G's fragmented energy-saving design, outlines new 6G scenarios and requirements, proposes a structured research methodology, and suggests specific potential solutions across UE, network, and power model domains.
Position
HONOR proposes a holistic, joint design approach for 6G energy efficiency from the initial release, arguing against the independent and late feature introduction seen in 5G NR. They require that energy-saving features, particularly network-side adaptations like cell DTX/DRX and dynamic common channel adaptation, must not degrade UE performance experience. For UE energy saving, HONOR proposes extending LP-WUS features to the network side, supporting BWP with reduced switching latency, and adaptive antenna number changes. For network energy saving, they propose inheriting NR's lean carrier concept with dynamic time-domain common channel adaptation, and further researching DTX/DRX, spatial/power domain, and frequency domain schemes. They also define specific 7 GHz BS reference configurations (32TRX as typical) and propose defining a new BS category with improved transition times, while updating FR1 UE reference configurations to 200 MHz bandwidth, 1024QAM, 2TX, and 0/26 dBm power levels.
Key proposals
- Proposal 1 (Sec Overall): The initial version of 6G needs to incorporate energy-saving factors into the design issues that need to be addressed.
- Proposal 2 (Sec Overall): Consider the design of energy-saving features as a whole to avoid overlapping and redundancy between features.
- Proposal 3 (Sec Overall): Joint consideration and design of UE energy saving and network energy saving to avoid mutual interference that prevents both from functioning simultaneously.
- Proposal 4 (Sec Research process and steps): The energy-saving project can be researched according to the following steps: First, conduct a comprehensive analysis of various energy-saving fields, prioritize them, and select the fields with high energy-saving gains for research. Second, analyze the high-priority fields, consider all factors within these fields comprehensively, and provide the optimal solution. Finally, conduct a comprehensive analysis of the solutions for each field and present an optimal overall energy-saving solution.
- Proposal 5 (Sec Potential solutions for 6G): The design of energy-saving should not affect the performance experience of the UE.
- Proposal 6 (Sec UE energy saving): The energy-saving features of LP-WUS can be considered simultaneously on both the UE and network sides in 6G.
- Proposal 7 (Sec UE energy saving): Support BWP in the frequency domain and consider further enhancements, such as addressing the latency of BWP switching.
- Proposal 8 (Sec UE energy saving): Support adaptive changes in the number of antennas in the spatial domain to reduce UE power consumption.
- Proposal 9 (Sec Network energy saving): Inherit the design concept of NR's lean carrier while supporting the dynamic time-domain adaptation of the common channel.
- Proposal 10 (Sec Network energy saving): Further research on energy-saving schemes for DTX and DRX in the time domain.
- Proposal 11 (Sec Network energy saving): Further research can be conducted on how to support network energy saving in the spatial and power domains.
- Proposal 12 (Sec Network energy saving): Further research on energy-saving schemes in the frequency domain.
- Proposal 13 (Sec Power consumption models): Confirm the reference configuration for set4 around 7 GHz in Table 1.
- Proposal 14 (Sec Power consumption models): Define a new category of BS with better transition time and relative power values.
- Proposal 15 (Sec Power consumption models): Reuse the existing FR1 UE reference configuration, but update the bandwidth, modulation scheme, number of Tx, and transmission power.