Uplink Power Boosting Indicator for Rapid Wireless Adjustments
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Solution Overview
Problem
Current wireless communication systems face challenges in rapidly changing uplink transmission power, particularly in next-generation communication systems requiring low latency and high reliability, where existing power control methods are inadequate for swift power adjustments.
Innovation Solution
Incorporating a power boosting indicator in downlink control information to enable User Equipment (UE) to efficiently and accurately determine uplink transmission power changes within a short time period, allowing for wider power range adjustments and improved power control in new radio access technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional power control methods are used, then system complexity is reduced, but uplink transmission power cannot be changed rapidly enough to meet low latency requirements
Solution Approach 1:
The power control mechanism is segmented into two parts: a pre-configured power table stored in the UE and a compact power boosting indicator transmitted via DCI. This segmentation allows rapid power adjustment by simply indicating a table entry rather than transmitting full power control parameters, thereby increasing power adjustment speed while keeping the signaling overhead low.
Solution Approach 2:
The power table is pre-configured and stored in the UE before actual transmission occurs. This preliminary action enables the UE to immediately apply the indicated power level without performing complex real-time calculations, thus achieving rapid power adjustment while maintaining simple device operation.
2Measurement precision
If existing downlink control information formats are used, then control signaling overhead is minimized, but power control precision for rapid adjustments is insufficient
Solution Approach 1:
The detailed power control information is extracted from the DCI and stored in advance in a power table. The DCI only needs to carry a compact indicator (e.g., 2-3 bits) that points to the pre-stored power configuration, thereby achieving precise power control without increasing control signaling overhead.
Solution Approach 2:
The power table acts as an intermediary between the network's power control decisions and the UE's transmission power setting. Instead of transmitting detailed power control parameters through DCI, the system uses the table as a mediator that stores pre-computed power configurations, allowing precise control with minimal signaling.
3Loss of time
If transmission power is drastically changed in a short time period, then system flexibility and latency are improved, but power control accuracy may be compromised
Solution Approach 1:
Multiple power levels and configurations are pre-calculated and stored in the power table before need arises. When rapid power adjustment is required, the UE simply retrieves the pre-computed power level indicated by the DCI, ensuring both rapid response (low latency) and accurate power setting (high reliability) without trade-off.
Solution Approach 2:
The system changes the parameter representation from direct power values to compact table indices. This parameter change allows the DCI to efficiently indicate different power configurations with few bits, enabling rapid and accurate power adjustments while maintaining reliability through pre-validated power settings in the table.
Data Source
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AI summary
A method by which a terminal transmits an uplink signal in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving downlink control information including a power boosting indicator; determining, on the basis of the power boosting indicator, first transmission power of a first symbol to which power boosting is applied and second trans mission power of a second symbol to which no power boosting is applied; and transmitting the uplink signal according to the first transmission power and the second transmission power, wherein the power boosting indicator is activated when the interval between the first symbol and the second symbol is less than or equal to a predetermined distance and the difference between the first transmission power and the second transmission power is greater than or equal to a predetermined power offset.