Wireless Terminal IDC Interference Reporting with Base-Station Coordination
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Solution Overview
Problem
In-device coexistence interference (IDC) occurs when multiple wireless communication systems operate simultaneously in a single terminal, causing interference between different frequency bands, which is not effectively addressed by existing techniques.
Innovation Solution
A method and apparatus for controlling IDC by transmitting and receiving UE and BS capability information, configuring measurement settings, and triggering IDC indications to manage interference through FDM, TDM, and power control schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple wireless communication systems operate simultaneously in a single terminal, then communication versatility and user convenience are improved, but in-device coexistence interference occurs between different frequency bands
Solution Approach 1:
The system performs preliminary detection of IDC interference conditions by monitoring frequency bands and transmission activities before interference occurs. When potential interference is detected, the system proactively adjusts transmission parameters or coordinates with the base station to prevent interference, rather than reacting after interference has degraded performance
Solution Approach 2:
The base station acts as an intermediary to coordinate IDC interference avoidance. The UE reports IDC indication information to the base station, which then makes centralized decisions about resource allocation, frequency selection, or transmission timing adjustments to resolve interference between different communication systems operating in the terminal
2Productivity
If bandwidth is extended to 20 MHz or more to increase transmission capacity, then data transmission capability is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts bandwidth utilization based on actual service requirements and interference conditions. Instead of continuously operating at maximum 20 MHz bandwidth, the terminal and base station adaptively select appropriate bandwidth configurations, activating wider bandwidth only when high data rates are needed and interference conditions permit, thereby reducing average power consumption while maintaining transmission capacity when required
3Productivity
If frequency bands are placed closer together to improve spectrum utilization, then spectral efficiency is improved, but in-device coexistence interference increases when spacing interval is not sufficiently large
Solution Approach 1:
The system implements feedback mechanisms where the terminal monitors interference levels between frequency bands and reports IDC indication information to the base station. Based on this feedback, the base station adjusts frequency band allocation, transmission power, or resource scheduling to maintain spectral efficiency while preventing interference when band spacing is reduced
Data Source
AI summary
Method and apparatus for controlling in-device coexistence (IDC) interference in a wireless communication system are described in the present invention. The present invention includes transmitting UE capability information whether the UE has a capability to measure IDC, to a base station (BS); receiving measurement configuration information whether the UE is allowed to send IDC indication, from the BS; and transmitting the IDC indication and at least one of measurements which are a measurement in consideration of IDC and a measurement without consideration of IDC to the BS. It is possible to control reducing occurrence of in-device coexistence interference.