LTE Bluetooth Coexistence Interference Detection
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Solution Overview
Problem
Current technologies face challenges in managing coexistence interference between different radio technologies, such as LTE and ISM/GNSS, deployed on the same device, leading to performance degradation due to interference, which existing filter technologies and RRM mechanisms are unable to adequately address.
Innovation Solution
A method for user equipment (UE) with both LTE and Bluetooth radio components that detects signal interference by measuring received signal power at predetermined intervals and sends an in-device coexistence indicator message if the measurement values exceed a threshold, using existing RSSI measurements or new BT-RSSI measurement approaches to identify SCO or eSCO interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LTE and ISM/GNSS components are configured to operate concurrently on the same device, then device functionality and versatility are improved, but coexistence interference occurs between adjacent frequency bands causing performance degradation
Solution Approach 1:
The patent extracts and identifies the harmful interference signal from the total received signal by measuring RSSI at predetermined time intervals and comparing measurement values to threshold power level values. This separates the interference detection function from general signal processing, enabling targeted mitigation of coexistence interference while maintaining concurrent operation of LTE and ISM/GNSS components.
Solution Approach 2:
The patent implements a feedback mechanism where the LTE radio component continuously monitors received signal power, compares measurements against thresholds, and generates in-device coexistence indicator messages when interference is detected. This feedback loop enables dynamic adjustment and mitigation of interference effects, allowing the system to maintain both versatility and performance.
2Object-affected harmful factors
If filter technology is used to address coexistence interference, then interference mitigation is improved, but terminal filters do not provide sufficient rejection on adjacent channel interference
Solution Approach 1:
The patent replaces physical filter technology with a signal measurement and detection approach. Instead of relying on hardware filters to reject adjacent channel interference, the system uses software-based RSSI measurement, threshold comparison, and indicator message generation to identify and mitigate interference. This substitution overcomes the limitations of terminal filter rejection capabilities.
3Productivity
If LTE transmission operates on specified bands, then LTE communication functionality is maintained, but interference is created to ISM/GNSS receiver operations
Solution Approach 1:
The patent implements preliminary detection of interference conditions by measuring RSSI at predetermined time intervals before interference severely impacts performance. By comparing measurement values to threshold values in advance, the system can identify potential interference issues and trigger mitigation actions, allowing LTE transmission to continue while protecting ISM/GNSS receiver operations.
Data Source
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AI summary
A method, system and device are provided for avoiding in-device coexistence interference between different radio technologies deployed in adjacent bands on the same device by estimating and identifying Bluetooth component interference activation when configuring LTE and non-LTE components to provide an in-device coexistence operation mode.