Multi Numerology Transmission for Wireless Reference Signals
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Solution Overview
Problem
In wireless communication systems, the use of different numerologies for data and reference signals can lead to compatibility issues between network nodes, particularly in scenarios where inter-site measurements and dual connectivity are required, resulting in challenges with signal orthogonality and propagation delays.
Innovation Solution
Configuring wireless devices to communicate reference signals using a first numerology independently of the numerology used for data communication, allowing for efficient measurement and inter-cell interference coordination while maintaining flexibility in numerology choice for data transmission based on service requirements and radio conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the same numerology is used for both reference signals and data communication, then compatibility between network nodes is improved, but flexibility in adapting to different service requirements and radio conditions deteriorates
Solution Approach 1:
The patent segments the numerology configuration into two independent parts: one for reference signals and another for data communication. This allows each to be optimized independently - reference signals use a first numerology for compatibility while data uses a second numerology for flexibility, resolving the contradiction between reliability and adaptability.
Solution Approach 2:
The patent introduces dynamic numerology selection where the network node can independently choose different numerologies for reference signals and data based on service requirements and radio conditions. This dynamic approach enables the system to adapt to changing conditions while maintaining compatibility where needed.
2Adaptability or versatility
If different numerologies are used for reference signals and data, then adaptability to service requirements is improved, but compatibility issues between network nodes worsen
Solution Approach 1:
The patent applies local quality by allowing different numerology configurations in different parts of the communication system - reference signals use one numerology configuration while data communication uses another. This localized differentiation enables adaptability where needed while preserving compatibility in critical measurement functions.
3Device complexity
If a single numerology is configured for all communications, then device complexity is reduced, but the ability to perform efficient inter-cell interference coordination deteriorates
Solution Approach 1:
The patent segments the communication parameters into separate numerology configurations for reference signals and data, enabling independent optimization. This segmentation allows efficient inter-cell interference coordination through flexible numerology selection while keeping device complexity manageable through structured configuration management.
Data Source
AI summary
A first network node (200), a wireless device (202) and methods therein, for radio communication. The first network node determines first (2:1) and second (2:3) numerologies for communication of a reference signal and data, respectively, the first and second numerologies defining different combinations of subcarrier spacing and time between two successive OFDM symbols. The first network node then configures (2:4) the wireless device with the first and second numerologies and transmits (2:5) an assignment of data in the second numerology to the wireless device, the assignment comprising a trigger for the reference signal. Thereby, the first network node and the wireless device can communicate (2:6) the reference signal using the first numerology, and communicate (2:7) the data using the second numerology.