Network-Controlled Repeater Interference Measurement via CIRS
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing interference effectively in cellular networks, particularly when network-controlled repeaters (NCRs) extend cell boundaries, leading to unintended interference and reduced network performance.
Innovation Solution
The implementation of a network-controlled repeater (NCR) that performs interference measurements on configured communication indication reference signals (CIRS), allowing for accurate interference estimation and reporting without the need for forwarding signals to a base station or user equipment (UE) for measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the NCR forwards reference signals to base stations or UEs for interference measurement, then measurement capability is achieved, but signaling overhead increases and measurement accuracy decreases
Solution Approach 1:
The NCR performs interference measurements autonomously by receiving and measuring CIRS directly, without requiring base stations or UEs to forward signals. This self-service approach eliminates the need for additional signaling overhead while maintaining measurement accuracy, as the NCR itself具备 the capability to measure interference on its receiving path.
2Loss of information
If the NCR performs interference measurements autonomously, then signaling overhead is reduced, but the NCR's measurement and reporting capability must be enhanced
Solution Approach 1:
The base station pre-configures the NCR with CIRS parameters including time-frequency resources, spatial relations, and measurement requirements before the NCR performs interference measurements. This preliminary configuration enables the NCR to autonomously conduct measurements and generate reports without requiring complex real-time coordination, thereby reducing signaling overhead while managing device complexity through advance setup.
3Area of stationary object
If NCRs extend cell boundaries to improve coverage, then network coverage is enhanced, but interference with neighboring cells increases
Solution Approach 1:
The NCR autonomously measures interference on CIRS and generates reports providing feedback to the base station about interference levels in neighboring cells. This feedback mechanism enables the base station to identify when NCR transmissions are causing harmful interference to neighboring cells and adjust parameters accordingly, allowing the system to maintain extended coverage while mitigating interference through informed parameter adjustments.
Data Source
AI summary
Various aspects of the present disclosure relate to a network-controlled repeater (NCR) that receives, from a base station, a first signaling indicating a reception beam and a first reference signal. The NCR receives a second reference signal from an interfering communication device, such as an interfering base station or user equipment (UE). The NCR performs a channel measurement on the first reference signal with the reception beam applied, and performs an interference measurement on the second reference signal with the reception beam applied. The NCR determines a signal strength comparison based on the channel measurement and the interference measurement, and transmits a second signaling as a report of the signal strength comparison to the base station.