UE Calibration Gap Timing via RNTI Offset
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Solution Overview
Problem
In wireless communications, determining a calibration gap for antenna port calibration in user equipment (UE) is hindered by significant latency and processing overhead introduced by radio resource control (RRC) messaging, which affects the accuracy and efficiency of power amplification calibration.
Innovation Solution
The UE determines a calibration gap using a radio network temporary identifier (RNTI), such as a cell RNTI (C-RNTI), to calculate a timing offset from a reference time, allowing for pre-configured or semi-dynamic duration and periodicity of the calibration gap, and adjusts power amplification based on received calibration signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RRC messaging is used to indicate calibration gap timing, then calibration can be performed, but significant latency and processing overhead are introduced
Solution Approach 1:
The patent extracts the calibration gap timing indication from RRC messaging and implements it directly through physical layer signaling (e.g., DCI formats). This removes the overhead and latency associated with higher-layer RRC procedures while maintaining the necessary calibration functionality.
Solution Approach 2:
The calibration gap timing is pre-configured and indicated through efficient signaling mechanisms before the actual calibration procedure. This allows the UE to prepare in advance without waiting for lengthy RRC messaging exchanges, reducing overall calibration latency.
2Reliability
If RRC messaging is used to indicate calibration gap timing, then calibration can be performed, but processing overhead is significantly increased
Solution Approach 1:
The patent extracts the calibration gap timing indication from RRC messaging and implements it directly through physical layer signaling (e.g., DCI formats). This removes the overhead and latency associated with higher-layer RRC procedures while maintaining the necessary calibration functionality.
Solution Approach 2:
The patent uses existing physical layer signaling structures (DCI formats) to carry calibration gap timing information, reusing established signaling mechanisms rather than introducing new complex RRC procedures. This reduces processing overhead by leveraging existing efficient signaling paths.
3Productivity
If calibration gap timing is determined without RRC messaging, then latency and overhead are reduced, but calibration accuracy may be compromised
Solution Approach 1:
The patent incorporates feedback mechanisms where the UE measures calibration signals and reports results, allowing the network to adjust and refine calibration gap timing and parameters. This ensures high precision is maintained even with reduced signaling overhead through iterative optimization.
Solution Approach 2:
The calibration gap timing and parameters are made dynamic and adjustable based on measured performance and feedback. This allows the system to adapt to different conditions and maintain optimal calibration precision while operating with efficient, low-overhead signaling.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may perform a calibration to improve the accuracy, reliability, or both of signal transmissions. The UE may determine timing for the calibration procedure based on a received identifier for the UE (e.g., a radio network temporary identifier (RNTI), such as a cell RNTI (C-RNTI)). For example, the UE may determine a calibration offset between a reference time and a calibration gap according to an equation using at least the identifier as input. During the calibration gap, the UE may transmit a calibration signal using one or more antenna ports and may calibrate (e.g., adjust power amplification for) the one or more antenna ports based on an estimated actual transmit power for the calibration signal (e.g., received by other antenna ports of the UE or received by another device).