Radio Communication Node DU Configuration for Wide Subcarrier Spacing
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Solution Overview
Problem
Current 3GPP specifications are inadequate for supporting wide subcarrier spacing (SCS) such as 960 kHz in the 52.6˜71 GHz frequency band, particularly in configuring the Distributed Unit (DU) function of radio communication nodes for Integrated Access and Backhaul (IAB) operations.
Innovation Solution
A radio communication node configuration that applies settings defined for unlicensed frequency bands, including specific parameters like Channel Access Mode and subcarrier spacing, to form cells in the unlicensed frequency band, ensuring appropriate DU configuration even with wide SCS like 960 kHz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wide subcarrier spacing (SCS) such as 960 kHz is supported in the 52.6-71 GHz frequency band, then phase noise is reduced and channel bandwidth efficiency is improved, but the current 3GPP specifications are inadequate and DU configuration becomes inappropriate
Solution Approach 1:
The patent applies the configuration settings designed for unlicensed frequency bands (NR-U) to the licensed 52.6-71 GHz band, making the DU configuration universal across different frequency bands and licensing types. This allows the same configuration parameters (including wide SCS up to 960 kHz) to be used in both NR-U and licensed bands, simplifying the specification and implementation while maintaining appropriate DU configuration for wide SCS operations
2Adaptability or versatility
If wide SCS such as 960 kHz is used, then coexistence with other systems is improved and overhead is reduced, but the number of supported SCS values increases making implementation more difficult
Solution Approach 1:
By reusing the NR-U configuration framework for the licensed 52.6-71 GHz band, the patent enables wide SCS (including 960 kHz) to be supported with a single unified configuration approach. This universality allows the system to achieve adaptability for coexistence with Wi-Fi and other systems while avoiding the need to create separate implementation paths for different SCS values, thereby maintaining ease of manufacture
Solution Approach 2:
The patent enables dynamic parameter changes by allowing the DU to configure wide SCS values (including 960 kHz) based on the applied NR-U configuration. This parameter flexibility allows the system to adapt to different channel conditions and coexistence requirements while maintaining a standardized configuration approach, thus achieving both adaptability and implementation ease
Data Source
AI summary
A radio communication node (100 B) transmits/receives a radio signal to/from an upper node via a first cell and transmits/receives a radio signal to/from a lower node via a second cell. When forming the second cell in the unlicensed frequency band, the radio communication node (100 B) applies the configuration for the unlicensed frequency band.