Uplink Transmit Power Control Accumulation Correction
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Solution Overview
Problem
In wireless communication systems, transmit power control (TPC) adjustment values can become outdated when user equipment (UE) switches antennas, Synchronization Signal Blocks (SSB), or beams, leading to inaccurate uplink transmission power calculations, resulting in performance issues such as unsuccessful packets and increased Block Error Rate (BLER).
Innovation Solution
The UE is configured to detect actions indicative of an outdated TPC adjustment value and adjust it by resetting or modifying the accumulated value, such as reducing or increasing it by a predetermined factor, to ensure accurate uplink transmission power calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE accumulates TPC adjustment values continuously, then the uplink transmit power calculation becomes more adaptive to channel conditions, but the TPC adjustment value becomes outdated when antenna or beam switching occurs, leading to inaccurate power calculations
Solution Approach 1:
The UE detects antenna switching, SSB switching, or beam switching events and proactively resets or adjusts the accumulated TPC adjustment value before using it for uplink transmit power calculation. This preliminary action prevents the use of outdated TPC values that would result from configuration changes, ensuring the accuracy and reliability of power calculations while maintaining adaptability during stable conditions.
2Device complexity
If the UE uses an outdated TPC adjustment value for uplink transmission, then the transmission power calculation is simplified, but the performance degrades with increased Block Error Rate and unsuccessful packets
Solution Approach 1:
The UE monitors for configuration change events (antenna switching, SSB switching, beam switching) that indicate the TPC adjustment value has become outdated. This feedback mechanism triggers a reset or adjustment of the accumulated TPC value, ensuring transmission reliability without adding significant complexity to the power calculation process.
Data Source
AI summary
Disclosed are methods, systems, and computer-readable medium to perform operations including receiving, from a base station, an indication to accumulate a transmit power control (TPC) adjustment value, the accumulated TPC adjustment value used to calculate an uplink (UL) transmit power; detecting at least one UE action that triggers adjusting the accumulated TPC adjustment value; and in response to detecting the at least one UE action, adjusting the accumulated TPC adjustment value.