SRS Transmission Power Control via Path Loss Measurement Fallback
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively controlling the transmission power of sounding reference signals (SRS) by user equipment (UE) when path loss cannot be accurately measured.
Innovation Solution
A method for controlling SRS transmission power in a wireless communication system, where the UE receives a synchronization signal/physical broadcast channel (SS/PBCH) block, performs access to a serving cell, and determines path loss measurement based on a reference signal (RS) resource. If the path loss measurement is successful, the SRS transmission power is controlled using the measurement value; if not, the power is controlled using information related to a power configuration obtained from the serving cell, and SRS transmission may be suspended.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE uses path loss measurement to control SRS transmission power, then the transmission power control accuracy is improved, but the system reliability deteriorates when path loss measurement fails
Solution Approach 1:
The patent introduces an intermediary mechanism (network side information) to bridge the gap when direct path loss measurement fails. When path loss measurement is unavailable or unreliable, the UE uses network provided information including reference signal received power (RSRP) and path loss reference values from the network side to calculate SRS transmission power, ensuring continuous reliable operation.
Solution Approach 2:
The patent implements parameter changes by switching between different power control methods based on measurement availability. When path loss measurement is successful, use measured path loss values; when measurement fails, switch to using network provided RSRP and path loss reference parameters, adapting the control parameter source to maintain system reliability.
2Duration of action of stationary object
If the UE transmits SRS without accurate path loss measurement, then the transmission continuity is improved, but the transmission power control precision deteriorates
Solution Approach 1:
The patent applies preliminary action by having the network side pre-configure and provide reference information (RSRP and path loss reference values) before the UE needs to transmit SRS. This advance preparation allows the UE to immediately use alternative power control parameters when measurement fails, maintaining continuity without significant precision loss.
Solution Approach 2:
The network side acts as an intermediary that provides backup power control information. When direct measurement is unavailable, the network provided RSRP and path loss reference values serve as intermediary parameters that enable the UE to continue SRS transmission with acceptable power control accuracy.
3Reliability
If the UE uses network provided power configuration information, then the transmission reliability is improved, but the measurement functionality is reduced
Solution Approach 1:
The patent implements dynamics by making the power control method adaptive and flexible. The UE dynamically switches between autonomous measurement-based power control and network-provided power control based on measurement availability and system conditions, optimizing the balance between measurement capability utilization and reliability.
Solution Approach 2:
The patent changes the parameter source dynamically - when measurement is available, use measured path loss; when not available, switch to network provided RSRP and path loss reference parameters. This parameter switching strategy ensures reliability while preserving measurement functionality when conditions permit.
Data Source
AI summary
Disclosed is a method for controlling the transmission power of a sounding reference signal (SRS) by a terminal in a wireless communication system. In particular, the method comprises: connecting to a serving cell; receiving an RS resource for acquiring path loss used for the transmission power of an SRS; determining measurement for the path loss on the basis of the RS resource; and controlling the transmission power of the SRS on the basis of the determination on the measurement, wherein the RS resource is related to a neighbor cell, a measurement value of the path loss is used to control the transmission power, on the basis that measurement for the RS resource has succeeded, and information related to a power setting, acquired from the serving cell can be used to control the transmission power, on the basis that the measurement for the RS resource has failed.