Subband ACL Measurement for Adjacent Channel Interference Control
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Solution Overview
Problem
There is a need for a method to effectively measure and report interference between frequency bands allocated to be adjacent in a wireless communication system that flexibly allocates uplink and downlink resources in the time and frequency domains for additional coverage extension.
Innovation Solution
A method and device for measuring and reporting adjacent channel leakage interference (ACL) by user equipment (UE) and base station, involving transmitting UE capability reports, configuration information, and measurement and reporting of subband-specific ACL interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible allocation of uplink and downlink resources in time and frequency domains is implemented for coverage extension, then network coverage and service versatility are improved, but adjacent channel interference between frequency bands increases
Solution Approach 1:
The patent segments the frequency band into multiple subbands and performs interference measurement and reporting separately for each subband. This allows the system to maintain flexible resource allocation across the entire bandwidth while identifying and managing interference in specific subbands, thus resolving the contradiction between versatility and interference.
Solution Approach 2:
The patent changes the measurement parameter from broad bandwidth interference to subband-specific interference by introducing subband filtering and selective measurement. This enables the system to adapt to flexible resource allocation while maintaining accurate interference measurement only in affected subbands, reducing overall interference impact.
2Measurement precision
If subband-specific ACL interference measurement and reporting is implemented, then interference measurement precision is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent applies preliminary action by having the network configure subband-specific interference measurement parameters in advance through RRC signaling. The UE then uses these pre-configured parameters to perform measurements efficiently without complex real-time processing, reducing device complexity while maintaining high measurement precision.
Solution Approach 2:
The patent implements dynamic subband configuration where the network can adaptively configure which subbands to measure based on actual interference conditions and service requirements. This dynamic approach allows the system to maintain high measurement precision only where needed, avoiding unnecessary complexity in subbands without interference.
3Measurement precision
If subband-specific ACL interference measurement is performed, then interference detection accuracy is improved, but measurement time and processing load increase
Solution Approach 1:
The patent applies local quality by performing detailed interference measurement only in subbands where interference is detected or suspected, rather than uniformly across all subbands. This allows the system to achieve high detection accuracy in critical areas while reducing overall measurement time and processing load in non-critical subbands.
Solution Approach 2:
The patent uses partial action by selectively measuring interference in specific subbands based on configuration and detected conditions, rather than performing exhaustive measurements across the entire bandwidth. This partial measurement approach achieves sufficient detection accuracy for service quality while significantly reducing measurement time and processing requirements.
Data Source
AI summary
Disclosed are a method and a device for controlling the measuring and reporting of adjacent channel interference in a wireless communication system. The method comprises the steps of: transmitting, to a base station, a terminal capability report related to the measurement and report of sub-band-specific adjacent channel leakage (ACL) interference; receiving, from the base station, setting information that indicates a frequency resource and a time resource for the measuring and reporting of sub-band-specific ACL interference; measuring sub-band-specific ACL interference on the basis of the setting information; and reporting, to the base station, the measured sub-band-specific ACL interference.