SRS Transmission Power Control in RRC Inactive State
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving signals, particularly in supporting high communication capacity, massive machine-type communications, and services sensitive to reliability and latency.
Innovation Solution
The proposed method involves a User Equipment (UE) in a wireless communication system receiving Radio Resource Control (RRC) signals with configuration information for Sounding Reference Signals (SRS). The UE determines transmission power for SRS based on included parameters and power offsets, even in an RRC inactive state, by considering previously transmitted Uplink signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits SRS in RRC inactive state using configuration information from RRC connected state, then positioning capability is enhanced and communication reliability is improved, but transmission power determination becomes complex due to need for power offset compensation
Solution Approach 1:
The network configures power offset parameters in advance during RRC connected state, which are stored and applied when transitioning to RRC inactive state. This preliminary configuration eliminates the need for real-time power negotiation, simplifying the power determination process while maintaining reliability.
Solution Approach 2:
The patent replaces complex real-time power negotiation mechanisms with a pre-configured parameter-based system. Instead of dynamic interactions between UE and network for power control, the system uses predetermined power offset parameters that automatically adjust transmission power based on signal quality measurements.
2Measurement precision
If the UE uses power offsets for compensation based on previously transmitted UL signals, then transmission accuracy is improved, but calculation complexity and processing time increase
Solution Approach 1:
The UE applies power offset compensation selectively based on available information. When recent UL signal measurements are available, full compensation is applied for high accuracy. When such measurements are unavailable or outdated, the system uses basic configured parameters, accepting reduced accuracy to save processing time.
Solution Approach 2:
The power determination mechanism dynamically adapts its complexity based on current conditions. The system transitions between simple configured parameter usage and complex power offset calculation based on the availability of recent signal measurements and the specific transmission scenario, optimizing the balance between accuracy and processing speed.
Data Source
AI summary
An embodiment relates to a next-generation wireless communication system for supporting a higher data transmission rate, etc. than that of a 4th generation (4G) wireless communication system. According to an embodiment, a method for transmitting and receiving signals in a wireless communication system and a device supporting same may be provided, and another embodiment may be provided.