5G Fronthaul Signaling for Mixed Numerologies
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Solution Overview
Problem
The existing fronthaul interface in 5G communication systems faces increased signaling overhead due to the need to support mixed numerologies, which complicates communication between O-DU and O-RU nodes.
Innovation Solution
The introduction of section type 8 and section type 9 messages that include numerology-related information and channel information, allowing for efficient channel-information-based beamforming operations with reduced signaling overhead by supporting mixed numerologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the fronthaul interface supports mixed numerologies, then the adaptability of the communication system is improved, but the signaling overhead increases
Solution Approach 1:
The signaling message is divided into multiple sections, where a first section carries numerology-related information and a second section carries channel information. This segmentation allows for organized transmission of different types of data, reducing redundancy and optimizing the use of signaling resources while supporting mixed numerologies.
Solution Approach 2:
The fronthaul interface is designed with a universal message structure that can handle multiple numerology types through a single standardized interface. The message format accommodates both first numerology information (e.g., subcarrier spacing, cyclic prefix length) and second numerology information, allowing the same interface to serve diverse communication requirements without requiring separate dedicated interfaces for each numerology type.
2Measurement precision
If detailed channel information is transmitted for each communication node, then the measurement precision is improved, but the quantity of data transmitted increases
Solution Approach 1:
Channel information from multiple communication nodes is merged into a single second section of the signaling message. Instead of transmitting separate messages for each node, the patent combines all channel information into one unified structure, reducing the total number of transmissions while preserving the precision of individual channel measurements.
Solution Approach 2:
The patent organizes channel information in a multi-dimensional structure where the first dimension identifies the communication node and the second dimension carries the channel information. This dimensional organization allows efficient indexing and retrieval of specific channel data without transmitting redundant information, optimizing the balance between precision and data volume.
Data Source
AI summary
Disclosed are a method and an apparatus for communication using fronthaul interfaces. An operation method of a first communication node may include transmitting a section type 8 message #1 including numerology-related information #1; transmitting a section type 9 message #1 including channel information of each of one or more second communication nodes indicated by the section type 8 message #1 and the numerology related information #1, transmitting a section type 8 message #2 including numerology-related information #2 other than the numerology-related information #1; and transmitting a section type 9 message #2 including channel information of each of one or more third communication nodes indicated by the section type 8 message #2 and the numerology-related information #2.