SRS Power Control for Bandwidth Aggregation Positioning
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Solution Overview
Problem
The challenge of accurately performing positioning measurement using sounding reference signals (SRSs) or SRS sets in bandwidth aggregation is not adequately addressed, as the transmission power of these signals is not appropriately determined, leading to inefficiencies in network device measurements.
Innovation Solution
A method for controlling power is provided, where terminals and network devices determine and adjust the transmission power of multiple SRSs or SRS sets for bandwidth aggregation based on factors such as subcarrier transmission powers, resource element quantities, maximum power limitations, and channel quality, ensuring appropriate power levels for improved positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If transmission power of SRSs or SRS sets is increased to improve positioning measurement accuracy, then measurement precision improves, but power consumption and interference increase
Solution Approach 1:
The patent dynamically adjusts transmission power parameters based on channel quality indicators (CQI) and path loss calculations. The terminal device determines appropriate power levels by changing power parameters according to channel conditions, achieving optimal positioning measurement accuracy while minimizing unnecessary power consumption.
Solution Approach 2:
The patent applies different transmission power levels to different SRS resources or SRS sets based on their specific channel conditions. Each SRS resource can have locally optimized power settings according to its channel quality, rather than using uniform high power across all resources, thus improving measurement accuracy where needed while reducing overall power consumption.
2Measurement precision
If transmission power of SRSs or SRS sets is increased to ensure signal quality within bandwidth aggregation, then positioning measurement accuracy improves, but signal interference to other users increases
Solution Approach 1:
The patent adjusts transmission power parameters dynamically based on channel quality and path loss. By calculating appropriate power levels using channel state information, the system ensures sufficient signal quality for accurate positioning measurements while avoiding excessive power that would cause interference to other users.
Solution Approach 2:
The patent implements feedback mechanisms where the terminal device monitors channel quality indicators and adjusts transmission power accordingly. This feedback loop ensures that power levels are optimized for positioning accuracy while automatically reducing power when channel conditions improve, thereby minimizing interference to other users.
3Measurement precision
If multiple SRSs or SRS sets are transmitted with different power levels to optimize bandwidth aggregation, then positioning measurement accuracy improves, but device complexity increases
Solution Approach 1:
The patent manages multiple SRS resources with different power parameters by systematically adjusting these parameters based on channel quality indicators. The terminal device maintains separate power settings for different SRS resources, optimizing positioning measurement accuracy across bandwidth aggregation while using standardized power control mechanisms to manage complexity.
4Measurement precision
If transmission power of SRSs or SRS sets is optimized for bandwidth aggregation, then positioning measurement accuracy improves, but difficulty in determining appropriate power levels increases
Solution Approach 1:
The patent determines appropriate transmission power levels by systematically changing power parameters based on channel quality indicators and path loss calculations. The terminal device uses standardized formulas and measurements (such as P0_SRS, alpha_SRS, and path loss) to automatically determine optimal power levels, reducing the difficulty of power level determination while improving positioning measurement accuracy.
Data Source
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AI summary
The present invention relates to a method for controlling power and apparatus, and a storage medium. The method comprises: receiving first information (S3401), the first information being used for determining at least two sounding reference signals (SRSs) or at least two SRS sets for bandwidth aggregation for positioning measurement; and sending each SRS or each SRS set of the at least two SRSs or the at least two SRS sets (S3402), the transmission power of each SRS or each SRS set being first transmission power. SRSs or SRS sets requiring the bandwidth aggregation are determined by means of the first information, and each SRS or each SRS set of the SRSs or the SRS sets requiring the bandwidth aggregation is sent at the first transmission power, so that the SRSs or the SRS sets can be transmitted at proper transmission power, thereby improving the accuracy of the positioning measurement.