Cross-Link Interference Measurement with Frequency Pre-Compensation
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately measuring cross-link interference (CLI) due to frequency pre-compensation applied by user equipment (UEs), leading to measurement inaccuracies and energy leakage, especially in high mobility scenarios where Doppler frequency offsets are significant.
Innovation Solution
The method involves a node, such as a UE or base station, determining if a received signal has frequency pre-compensation applied and adjusting measurements accordingly, either by undoing the pre-compensation or using an offset to account for it, to accurately measure CLI, thereby reducing frequency domain energy leakage and improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If frequency pre-compensation is applied to counteract Doppler frequency offsets in high mobility scenarios, then signal reception stability is improved, but measurement accuracy of CLI deteriorates due to frequency domain energy leakage
Solution Approach 1:
The patent applies preliminary action by performing frequency pre-compensation before CLI measurement. The receiving node determines that frequency pre-compensation has been applied to the received signal, and then adjusts the measurement process accordingly by applying a corresponding frequency offset compensation. This preliminary adjustment prevents frequency domain energy leakage during measurement, thereby maintaining both signal reception stability and measurement accuracy.
Solution Approach 2:
The patent employs parameter changes by dynamically adjusting the frequency offset parameter based on the detected frequency pre-compensation. When the node determines that frequency pre-compensation has been applied by the transmitting node, it changes the measurement frequency parameter to compensate for the pre-compensation effect. This parameter adjustment eliminates frequency mismatch and prevents energy leakage in the frequency domain, resolving the contradiction between stability and measurement precision.
2Reliability
If frequency pre-compensation is applied by UEs to handle Doppler effects, then communication reliability in high mobility scenarios is improved, but CLI measurement accuracy deteriorates
Solution Approach 1:
The patent implements feedback by having the receiving node detect and determine whether frequency pre-compensation has been applied to the received signal. Based on this detection feedback, the node adjusts its measurement strategy accordingly. The node uses feedback from the signal characteristics to identify the presence of frequency pre-compensation and applies appropriate compensation in reverse, thereby maintaining measurement accuracy while preserving communication reliability.
Solution Approach 2:
The patent applies preliminary action by preparing the measurement process in advance to account for frequency pre-compensation. Before performing CLI measurement, the receiving node determines the frequency pre-compensation status and pre-adjusts the measurement frequency parameters. This preliminary preparation ensures that the measurement is performed on properly compensated signals, maintaining both communication reliability and measurement precision.
3Ease of operation
If standard CLI measurement is performed without considering frequency pre-compensation, then measurement process simplicity is maintained, but measurement accuracy deteriorates due to frequency domain energy leakage
Solution Approach 1:
The patent applies self-service by enabling the receiving node to autonomously detect and determine whether frequency pre-compensation has been applied to the received signal. The node performs self-adjustment by determining the frequency pre-compensation status and automatically compensating for it in the measurement process. This self-service mechanism maintains measurement accuracy without requiring complex external intervention or configuration, resolving the contradiction between simplicity and precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for more accurate CLI measurement, reducing errors and ensuring that interference is properly assessed, enabling better scheduling and resource allocation to minimize interference between UEs with different time division duplexing configurations.
Implementation Method 1
frequency pre-compensation applied by the different node... in high mobility scenarios where Doppler frequency offsets are significant
Data Source
AI summary
Aspects described herein relate to receiving, by a node, a signal from a different node for determining a level cross-link interference from the node, determining, by the node, that the signal, as received from the different node, has a frequency pre-compensation applied by the different node, and measuring the signal, based on determining that the signal has the frequency pre-compensation applied, to determine the level of cross-link interference from the different node.