Uplink Reference Signal Transmission Control via Path Loss Threshold
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Solution Overview
Problem
In wireless communication systems, when a downlink (DL) reference signal for uplink (UL) power control is not successfully detected, there is a need for a method and apparatus to effectively manage UL signal transmission.
Innovation Solution
The method involves receiving information on a DL RS resource related to path loss estimation and determining whether the measurement for path loss estimation is successful based on the quality of the DL RS resource. If the measurement is successful and the path loss estimation exceeds a predetermined threshold, the UL RS is not transmitted. This approach is applicable to both serving and non-serving cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UL RS transmission is performed without checking DL RS measurement success, then UL signal transmission continuity is maintained, but power is wasted and interference increases
Solution Approach 1:
The patent applies preliminary action by performing DL RS measurement and path loss estimation before UL RS transmission. The UE determines measurement success criteria in advance (checking if path loss is within a threshold range) and only transmits UL RS when conditions are satisfied, preventing wasted power consumption from transmissions based on incorrect path loss values.
2Productivity
If UL RS transmission is performed without verifying path loss estimation accuracy, then transmission timing is maintained, but interference between cells increases
Solution Approach 1:
The patent implements feedback by having the UE monitor DL RS quality and provide internal feedback on measurement success. The UE compares measured path loss against a threshold and adjusts UL RS transmission accordingly, preventing transmissions that would cause interference to non-serving cells while maintaining timing efficiency.
3Device complexity
If DL RS measurement success is not determined, then UL transmission procedure is simplified, but transmission power control accuracy deteriorates
Solution Approach 1:
The patent applies parameter changes by introducing a path loss threshold parameter that the UE compares against measured path loss values. This simple parameter-based decision mechanism determines measurement success without complex procedures, yet achieves accurate path loss estimation by ensuring transmissions only occur when path loss is within acceptable ranges.
Data Source
AI summary
Various embodiments relate to a next generation wireless communication system for supporting a higher data transfer rate and the like beyond 4th generation (4G) wireless communication systems. Provided according to various embodiments are a method for transmitting and receiving a signal in a wireless communication system and a device supporting same, and various other embodiments may also be provided.