O-RAN Fronthaul Measurement Reporting with Aggregated Notifications
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Solution Overview
Problem
Existing communication systems with fronthaul interfaces face challenges in efficiently transmitting and receiving parameters for performance management between O-RU and O-DU, with the YANG model in the O-RAN M-Plane not supporting the transmission of multiple measurement results in a single notification.
Innovation Solution
The proposed method involves generating and transmitting a single notification message containing a list of measurement results for multiple objects, including a most recent result, with the ability to be decoded by different O-DU versions, and setting notification intervals longer than measurement intervals to efficiently manage performance parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple measurement results are transmitted in separate notifications, then each notification can be decoded by existing O-DU versions, but the transmission efficiency and message overhead are reduced
Solution Approach 1:
The patent combines multiple measurement results into a single notification message by introducing a measurement result list structure. Instead of sending separate notifications for each measurement result, the O-RU aggregates multiple measurement results (e.g., from different measurement objects or time instances) into one notification containing a list of results, thereby improving transmission efficiency and reducing message overhead.
Solution Approach 2:
The notification message structure is designed to be universal and version-independent. The measurement result list can be decoded by O-DUs supporting versions after a specific version, while the notification itself can be decoded by O-DUs supporting versions before the specific version. This multi-version compatibility allows the same notification structure to serve multiple O-DU versions without requiring separate transmission mechanisms.
2Reliability
If notification interval is set equal to measurement interval, then all measurement results are transmitted promptly, but the notification frequency increases and system overhead increases
Solution Approach 1:
The patent introduces dynamic notification intervals that are independent of measurement intervals. The notification interval can be adjusted based on system requirements, allowing the O-RU to transmit aggregated measurement results at optimized frequencies. This dynamic adjustment enables the system to balance between maintaining fresh measurement data (reliability) and reducing notification frequency (productivity).
Solution Approach 2:
The patent implements periodic notification transmission based on a configured notification interval. Instead of transmitting every measurement result immediately when obtained, the O-RU accumulates measurement results and transmits them periodically at intervals specified by the O-DU. This periodic action reduces system overhead while ensuring that measurement results are transmitted at regular, predictable intervals.
Data Source
AI summary
A communication system including a fronthaul interface is provided. In one embodiment, an operation method of an O-RU includes generating a plurality of first measurement results by performing measurement operations on a first measurement target in a single notification period according to a notification interval, generating a first measurement result list including the plurality of first measurement results, and transmitting, to an O-DU, a message including the first measurement result list.