Positioning SRS Transmission on SUL With Accurate Beam and Power Control
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Solution Overview
Problem
User equipment (UE) may experience power loss or fail to configure a correct beam direction when the cell referenced for sounding reference signal (SRS) transmission differs from the cell used for measuring transmission power, leading to inefficiencies in wireless communication systems.
Innovation Solution
A method is provided for transmitting a positioning sounding reference signal (SRS) on supplementary uplink (SUL) based on predefined conditions, including resource allocation information and downlink reference signal strength, to ensure accurate beam configuration and power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the cell referenced for SRS transmission is different from the cell used for measuring transmission power, then resource allocation flexibility is improved, but power control accuracy deteriorates
Solution Approach 1:
The patent segments the SRS transmission process into two distinct parts: (1) SRS transmission on SUL with resource allocation from SUL cell, and (2) path loss measurement on non-SUL cell. This segmentation allows each part to use the most appropriate cell for its specific function, resolving the contradiction between flexibility and accuracy.
Solution Approach 2:
The patent introduces an intermediary mechanism where the UE measures path loss on the non-SUL cell (which provides accurate power reference) and applies this measurement to control transmission power for SRS on SUL. This intermediary approach decouples the power measurement function from the transmission function, allowing optimal performance of both.
2Adaptability or versatility
If the cell referenced for SRS transmission is different from the cell used for measuring transmission power, then beam configuration flexibility is improved, but beam direction accuracy deteriorates
Solution Approach 1:
The patent segments beam configuration into two independent functions: (1) beam direction determination based on downlink reference signals from non-SUL cell, and (2) SRS transmission beam application on SUL. This allows each function to use the most appropriate cell characteristics.
Solution Approach 2:
The patent applies preliminary action by having the UE determine the uplink beam direction in advance based on downlink reference signal measurements from the non-SUL cell before transmitting SRS on SUL. This preliminary beam configuration ensures accurate beam direction is established before transmission occurs.
3Measurement precision
If positioning SRS is transmitted on SUL, then positioning accuracy is improved, but power loss occurs
Solution Approach 1:
The patent implements feedback-based power control where the UE measures path loss on the non-SUL cell and uses this measurement to adjust transmission power for positioning SRS on SUL. This feedback mechanism ensures transmission power is optimized to achieve required positioning accuracy while minimizing power loss.
Solution Approach 2:
The patent changes the power control parameters by using path loss measurements from non-SUL cell instead of SUL cell. This parameter change allows the system to compensate for SUL transmission characteristics and achieve accurate power control despite the cell difference, reducing power loss while maintaining positioning accuracy.
Data Source
AI summary
Various embodiments relate to a next-generation wireless communication system for supporting a data transmission rate higher than that of a 4th generation (4G) wireless communication system. According to various embodiments, provided are a method for transmitting/receiving a signal in a wireless communication system, and an apparatus for supporting same. Various other embodiments may be provided.