Uplink Reference Signal Transmit Power Derivation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing transmit power for uplink reference signals, particularly in higher frequency bands where beamforming is complex and power control mechanisms are not effectively adapted to the specific needs of different beams, leading to reduced coverage and reliability.
Innovation Solution
A method and apparatus for a User Equipment (UE) to derive and transmit different transmit powers for uplink reference signals (UL RS) using distinct power control mechanisms, where one power is associated with an uplink data channel and another is not, allowing for adaptive power control per beam to enhance coverage and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a unified power control mechanism is used for all uplink reference signals, then the device complexity is reduced and ease of operation is improved, but the reliability and coverage are degraded due to inability to adapt to different beam requirements
Solution Approach 1:
The patent segments the uplink reference signals into different types (e.g., SRS, DM-RS, CSI-RS) and applies distinct power control mechanisms to each type. This allows each reference signal to be optimized independently for its specific function, improving overall reliability without requiring complete redesign of the entire power control system.
Solution Approach 2:
The patent introduces dynamic power control parameters that can be adjusted based on beamforming configurations and channel conditions. The power control mechanism becomes adaptive, allowing the system to optimize reliability under varying operational conditions while maintaining manageable complexity through structured parameter management.
2Area of stationary object
If adaptive power control per beam is implemented, then the coverage and reliability are improved, but the device complexity increases due to multiple power control mechanisms
Solution Approach 1:
The patent applies different power control parameters and mechanisms to different spatial beams and reference signal types. Each beam can have locally optimized power control settings tailored to its specific channel characteristics and coverage requirements, enabling enhanced coverage without requiring uniform complexity across all beams.
Solution Approach 2:
The patent utilizes configurable power control parameters (such as power offsets, path loss compensation factors, and target received powers) that can be adjusted per beam and reference signal type. This allows coverage optimization through parameter tuning rather than structural redesign, managing complexity while achieving local quality improvements.
3Adaptability or versatility
If multiple distinct power control mechanisms are used for different UL RS types, then the adaptability is improved for specific beam requirements, but the ease of operation deteriorates due to complex power derivation processes
Solution Approach 1:
The patent establishes a unified power control framework that handles multiple reference signal types through a common set of principles and procedures. While specific parameters differ by RS type, the overall mechanism remains consistent, allowing the system to maintain adaptability across different scenarios while preserving ease of operation through standardized processes.
Solution Approach 2:
The patent enables the UE to autonomously determine the appropriate power control mechanism and parameters based on received configuration information and channel conditions. The device self-configures its power control behavior without requiring manual intervention, maintaining adaptability while simplifying operation through automated decision-making.
Data Source
AI summary
A method and apparatus are disclosed, from the perspective of a UE, for transmitting UL RS. In one embodiment, the method includes deriving a first transmit power of a first UL RS based on a first power control mechanism, wherein derivation of the first transmit power based on the first power control mechanism is associated with an uplink data channel. In addition, the method includes deriving a second transmit power of a second UL RS based on a second power control mechanism, wherein derivation of the second transmit power based on the second power control mechanism is not associated with the uplink data channel. Furthermore, the method includes transmitting the first UL RS with the first transmit power. The method also includes transmitting the second UL RS with the second transmit power.