Fronthaul C-Plane Simplification for Multi-Antenna PRACH and SRS
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Solution Overview
Problem
Conventional RANs face challenges in scalability, upgradeability, and cost efficiency due to their integrated architecture and application-specific hardware, particularly in cloud-based radio access networks (CRANs) where high computational costs are incurred by sending C-Plane messages for each antenna in the DU and RU, which is burdensome and inefficient.
Innovation Solution
Implementing a method where the DU and RU agree to send a C-Plane message only for the first antenna, allowing the RU to transmit data for all antennas using sequence IDs and PRB ranges, reducing unnecessary computational overhead by optimizing the fronthaul interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If C-Plane messages are sent for each antenna in DU and RU, then complete antenna control and signaling is achieved, but computational overhead and processing costs increase significantly
Solution Approach 1:
The patent merges C-Plane messaging for multiple antennas into a single aggregated message structure. Instead of sending separate C-Plane messages for each antenna, the system combines antenna information from multiple antennas into one consolidated C-Plane message, reducing the number of messages and associated processing overhead while maintaining complete control capability.
Solution Approach 2:
The patent creates a universal C-Plane message format that can carry information for multiple antennas simultaneously. This multi-functional message structure allows a single message to serve the control and signaling needs of multiple antennas, eliminating the need for separate dedicated messages for each antenna and thereby reducing computational overhead.
2Ease of operation
If separate C-Plane messages are transmitted for each antenna, then detailed antenna-specific control is maintained, but fronthaul interface complexity and messaging overhead increase
Solution Approach 1:
The patent combines multiple antenna-specific control functions into a single C-Plane message structure. By merging the control plane information for multiple antennas into one message, the system reduces fronthaul interface complexity and messaging overhead while preserving the ability to control each antenna individually through the unified message format.
3Stability of the object's composition
If conventional integrated RAN architecture is used, then system stability is maintained, but scalability and upgradeability are limited
Solution Approach 1:
The patent applies segmentation by separating the C-Plane messaging function from individual antenna processing. This architectural segmentation allows the control plane to be independently optimized and upgraded without affecting the overall system stability, enabling scalable deployment and easier upgrades while maintaining stable operation.
Data Source
AI summary
There are provided systems, methods, and interfaces for optimization of the fronthaul interface bandwidth for Radio Access Networks and Cloud Radio Access Networks to reduce the traffic the between the baseband unit and the radio unit and then reduce the time needed in DU.