Network Node CLI Measurement via Scheduled Reference Signals
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Solution Overview
Problem
Current communication systems face challenges in accurately measuring cross-link interference (CLI) between network nodes, particularly in full-duplex operations where self-interference and atmosphere ducting effects complicate interference management.
Innovation Solution
The proposed solution involves a method where a first network node transmits first reference signals to second network nodes and receives second reference signals from third network nodes, allowing it to measure the CLI level associated with the third network nodes based on these signals. This method includes scheduling configurations for the transmission and reception of reference signals to effectively measure CLI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signals are transmitted and received simultaneously for CLI measurement, then measurement capability is enabled, but self-interference and atmosphere ducting effects complicate the measurement accuracy
Solution Approach 1:
The system performs preliminary scheduling of reference signal transmissions and receptions to avoid simultaneous operations that cause self-interference. The network node determines a scheduling configuration that sequences reference signal transmissions before measurements, allowing the transmitting node to complete transmissions before receiving reference signals from other nodes, thereby eliminating self-interference effects on measurement accuracy
Solution Approach 2:
The network entity acts as an intermediary that coordinates and schedules reference signal transmissions between network nodes. It determines the scheduling configuration that assigns specific time slots and resources for reference signal transmissions, ensuring that nodes do not transmit and receive simultaneously, thus mediating the interference problem while enabling accurate CLI measurements
2Reliability
If network nodes transmit and receive reference signals for CLI measurement, then interference management capability is improved, but device complexity increases due to scheduling coordination requirements
Solution Approach 1:
The network entity performs multiple functions including determining scheduling configurations, coordinating reference signal transmissions, and managing CLI measurements across multiple network nodes. This multi-functional approach consolidates complexity into a centralized controller rather than distributing it across all nodes, improving reliability while managing device complexity through functional consolidation
Solution Approach 2:
Network nodes autonomously determine their own reference signal transmission parameters based on the scheduling configuration received from the network entity. Each node independently configures its transmissions according to the coordinated schedule, eliminating the need for complex real-time negotiation and reducing overall system complexity while maintaining reliable interference management
Data Source
AI summary
A first network node may transmit, to one or more second network nodes, one or more first reference signals. The first network node may receive, from one or more third network nodes, one or more second reference signals. The first network node may measure a CLI level associated with at least one third network node in the one or more third network nodes based on the one or more second reference signals. In one or more configurations, the first network node may receive, from a network entity different from the first network node, a configuration associated with the transmission of the one or more first reference signals or the reception of the one or more second reference signals. In one or more configurations, the one or more second network nodes and the one or more third network nodes may or may not include at least one same network node.