5G Power Offset Set Configuring Reference Signal Transmit Power
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Solution Overview
Problem
In 5G systems, user equipment (UE) cannot accurately determine the transmit power of a reference signal (RS) used by a base station due to the lack of dynamic indication of actual transmit power and unknown antenna panel configuration, leading to inaccurate power determination.
Innovation Solution
A method is introduced to configure a power offset set with multiple power offset values representing differences in transmit power between various types of RS transmissions, and to transmit indication information to UE, allowing it to determine the actual power used by the base station for RS transmission, using high layer signaling such as RRC and physical layer/MAC signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic multi-panel beamforming is used to improve transmission flexibility, then adaptability is improved, but information availability deteriorates because UE cannot determine actual RS transmit power
Solution Approach 1:
The patent introduces an intermediary mechanism (power offset indication signaling) that mediates between the gNB's power transmission and the UE's power determination. The gNB transmits power offset values through DCI or MAC CE signaling, which serve as intermediaries to convey power information from the network to the UE without requiring direct exposure of internal power configuration details.
Solution Approach 2:
The patent implements a feedback mechanism where the gNB provides power offset information to the UE through indication signaling. This feedback loop allows the UE to accurately determine RS transmit power by combining the indicated power offset with known reference power values, resolving the information asymmetry in dynamic multi-panel beamforming scenarios.
2Measurement precision
If power offset set is configured and indication information is transmitted to enable accurate power determination, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the power indication mechanism into distinct components: a pre-configured power offset set containing multiple power offset values, and dynamic indication signaling that selects specific offsets. This segmentation allows the UE to determine power accurately by combining static configuration with dynamic selection, managing complexity through structured decomposition.
Solution Approach 2:
The patent employs dynamic selection of power offset values from a pre-configured set through indication signaling. The gNB can dynamically indicate different power offsets via DCI or MAC CE based on current transmission conditions, allowing flexible power adjustment while maintaining a manageable configured set, thus balancing measurement precision with signaling overhead.
Data Source
AI summary
A method of indicating transmit power of a reference signal (RS), a method of receiving transmit power of an RS, a network device, and user equipment are provided. The method includes: configuring a power offset set including a plurality of power offset values, where a power offset value in the power offset set represents a difference between power used to transmit a first RS and power used to transmit a second RS; and transmitting indication information to user equipment, where the indication information carries an actual difference value between the power used to transmit the first RS and the power used to transmit the second RS, and the actual difference value between the power is a power offset value in the power offset set.