Power Indication Information Transmission for ORAN Energy Efficiency
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Solution Overview
Problem
Current wireless communication networks, particularly in the context of Open RAN (ORAN) systems, lack an effective solution for energy saving due to the absence of standardized symbol-based power control mechanisms, leading to inefficient energy usage across different vendor implementations.
Innovation Solution
A method and device for transmitting power indication information, which involves receiving data subjected to inverse fast Fourier transform (IFFT), buffering it within a time slot, determining the power of the data, and sending power indication information along with the data, allowing for power control adjustments based on the calculated power levels of each OFDM symbol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If symbol-based power control is implemented in ORAN systems, then energy efficiency is improved, but vendor interoperability deteriorates due to lack of standardization
Solution Approach 1:
The patent creates a universal power indication information transmission mechanism that works across different vendor implementations in ORAN systems. By defining a standardized interface for power indication information exchange between DU and RU, the solution enables energy efficiency improvements while maintaining vendor interoperability - the same mechanism serves multiple vendors and implementation scenarios universally.
Solution Approach 2:
The patent introduces power indication information as a new parameter that carries power control directives from DU to RU. This parameter enables dynamic power adjustment at the RU level without requiring changes to the core ORAN architecture, allowing energy efficiency optimization while preserving system compatibility across different vendors.
2Measurement precision
If power indication information is transmitted for each OFDM symbol, then power allocation precision is improved, but signaling overhead increases
Solution Approach 1:
The patent segments power control into two levels: slot-level power indication information transmitted from DU to RU, and symbol-level power allocation performed autonomously by the RU based on the received slot-level information. This segmentation reduces signaling overhead by eliminating the need to transmit power information for every symbol, while still achieving precise power allocation through the RU's autonomous symbol-level processing.
Solution Approach 2:
The patent implements preliminary power control by transmitting power indication information at the slot level before actual OFDM symbol transmission. This preliminary action provides the RU with advance power allocation directives, enabling the RU to autonomously perform symbol-level power control without requiring continuous signaling, thus reducing overhead while maintaining precision.
3Speed
If power control information is processed in real-time, then response speed is improved, but processing complexity increases
Solution Approach 1:
The patent introduces power indication information as an intermediary that carries power control directives from the DU to the RU. This intermediary simplifies the processing architecture by providing pre-computed power allocation information that the RU can directly apply, eliminating the need for complex real-time power calculations at the RU and reducing processing complexity while maintaining fast response speed.
Data Source
AI summary
A method and device for power indication information transmission are provided. The method includes receiving data subjected to inverse fast fourier transform (IFFT); buffering the received data within the time slot; determining power of the received data within the time slot; sending power indication information and the received data respectively, wherein the power indication information includes information of the power of the received data within the time slot. Therefore, power saving is improved significantly, and DPD also can get benefit from power indication information for pre-distortion processing.