User Equipment Interference Notification for Cellular Coexistence
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Solution Overview
Problem
Current smartphone and tablet devices experience interference between cellular and other radio systems, leading to unnecessary throughput reduction due to undefined trigger conditions for InDeviceCoexIndication, causing base stations to incorrectly implement interference countermeasures during simultaneous communications.
Innovation Solution
User equipment determines and reports interference notifications to the cellular system based on acquired information such as positional, transmission, and quality data, allowing for targeted interference countermeasures like resource block restriction and secondary cell release only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user equipment gives a notification of InDeviceCoexIndication when simultaneously communicating with cellular system and other radio system, then interference can be avoided, but unnecessary throughput reduction occurs when interference does not actually exist
Solution Approach 1:
The invention changes the notification parameter from a binary state (notify or not notify) to a multi-level state based on quality thresholds. The cellular communication quality is measured against a predetermined threshold, and the notification is triggered only when the quality exceeds this threshold, indicating actual interference. This parameter change enables differentiated notification strategies that avoid unnecessary throughput reduction while ensuring reliable interference avoidance.
Solution Approach 2:
The invention implements a feedback mechanism where the user equipment continuously monitors cellular communication quality and compares it against a threshold. Based on this feedback loop, the equipment dynamically decides whether to send the InDeviceCoexIndication notification. This feedback-based approach ensures notifications are sent only when necessary, preventing unnecessary throughput reduction while maintaining reliable interference avoidance.
2Reliability
If the base station executes interference countermeasure processing such as resource block restriction and secondary cell release, then interference is avoided, but communication quality deteriorates due to unnecessary countermeasures
Solution Approach 1:
The invention changes the trigger condition parameter for interference countermeasures from a simple presence of simultaneous communication to a quality-threshold-based condition. The base station executes countermeasures only when the user equipment reports quality exceeding the threshold, ensuring countermeasures are taken only when actual interference exists. This prevents unnecessary communication quality deterioration while maintaining reliable interference avoidance.
Solution Approach 2:
The invention implements a feedback-based decision mechanism where the base station receives quality information from the user equipment and dynamically adjusts countermeasure execution accordingly. This feedback loop ensures countermeasures are applied only when necessary, avoiding unnecessary communication quality deterioration while ensuring reliable interference avoidance.
3Measurement precision
If the user equipment monitors reception state by other system chip and determines quality deterioration, then accurate interference detection is achieved, but device complexity increases
Solution Approach 1:
The invention extracts only the essential monitoring function needed for interference detection, separating it from comprehensive reception state monitoring. The user equipment monitors only the specific parameter (cellular communication quality) that indicates interference, rather than monitoring all reception states. This extraction approach achieves accurate interference detection while minimizing device complexity.
Solution Approach 2:
The invention applies local quality monitoring by focusing on specific quality metrics relevant to interference detection rather than进行全面 reception state monitoring. The equipment monitors cellular communication quality in the context of simultaneous radio communications, applying monitoring resources locally to the critical parameter. This approach achieves accurate interference detection while keeping device complexity manageable.
Data Source
AI summary
A technique is provided that is for efficiently avoiding interference that occurs due to simultaneous communication with different radio systems. An aspect of the present invention relates to user equipment including a cellular communication controller that controls first radio communication with a cellular system, and a different radio system communication controller that controls second radio communication with a different radio system other than the cellular system, wherein the cellular communication controller reports, to the cellular system, interference notice indicating interference between the first radio communication and the second radio communication, based on information obtained in the first radio communication.