Subband ACL Interference Reporting for Flexible Wireless Resource Allocation
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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) in a wireless communication system, involving a user equipment (UE) transmitting a capability report, receiving configuration information, and measuring and reporting subband-specific ACL interference, and a base station configuring and receiving these reports.
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 coverage and flexibility 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 separately for each subband. The UE measures ACL interference on a per-subband basis and reports subband-specific interference values to the base station, allowing differentiated resource allocation and interference management for each subband while maintaining overall flexible TDD operation.
Solution Approach 2:
The patent introduces subband-specific interference measurement and reporting mechanisms that change the measurement granularity parameter from cell-wide to subband-level. This enables dynamic adjustment of resource allocation parameters based on actual interference conditions in different frequency regions, resolving the contradiction between flexibility and interference.
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 frequency band is divided into multiple subbands, and interference measurement is performed separately for each subband. This segmentation enables precise interference detection at subband level while distributing the measurement complexity across multiple smaller units rather than requiring complex wideband processing.
Solution Approach 2:
The UE measures interference on all configured subbands but the base station can selectively use only the necessary subband-specific reports for resource allocation decisions. This partial action approach achieves sufficient measurement precision for practical purposes without requiring processing of all possible measurement data, reducing overall system complexity.
Data Source
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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.