CLI Measurement Timing With TA-Based Cell Identification
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Solution Overview
Problem
Existing wireless communication systems struggle to distinguish between inter-cell and intra-cell cross-link interference (CLI) accurately, which affects the reliability and latency of communication, particularly in next-generation radio access technologies like NR.
Innovation Solution
A method and device that enable a user equipment (UE) to report cross-link interference (CLI) measurements by including timing advance (TA) information and cell identifier (ID) based on measurement timing, allowing differentiation between inter-cell and intra-cell CLI environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CLI measurement is performed without TA information, then measurement process is simple, but inability to distinguish inter-cell and intra-cell CLI environments degrades communication reliability
Solution Approach 1:
The base station pre-configures TA information for multiple candidate cells before CLI measurement. The UE uses this pre-provided TA information to determine the source cell of CLI by comparing measured timing advance with configured values, enabling reliable inter-cell vs intra-cell distinction without adding complex real-time measurement procedures
Solution Approach 2:
TA information serves as an intermediary parameter that bridges the gap between raw CLI measurement and cell identification. By introducing TA values as a mediating element, the system can indirectly identify the source cell of CLI interference without requiring direct cell signaling or complex measurement procedures
2Reliability
If TA information is used to determine cell ID for CLI measurement, then inter-cell and intra-cell CLI can be distinguished improving reliability, but measurement and reporting complexity increases
Solution Approach 1:
The CLI measurement reporting is segmented into distinct components: CLI measurement value, cell ID determination (based on TA comparison), and optional TCI state information. This segmentation allows the system to process and report different aspects separately, managing complexity through structured information organization
Solution Approach 2:
The system implements optional reporting where the UE can report only essential information (CLI value and cell ID) or include additional details (TCI state information) based on configuration. This partial action approach allows flexibility in managing reporting complexity while maintaining the core functionality of reliable CLI source identification
Data Source
AI summary
Disclosed, according to various embodiments, are a method by which a terminal performs cross link interference (CLI) measurement in a wireless communication system and an apparatus therefor. Disclosed are a method and an apparatus therefor, the method comprising the steps of: receiving information about a CLI measurement resource for CLI measurement; and transmitting, to a base station, measurement information including CLI measured on the basis of the CLI measurement resource, wherein, on the basis that timing advance (TA) information of a candidate cell is received, the measurement information further includes information about a cell ID determined on the basis of the TA information and a measurement timing when the CLI is measured.