O-RAN Control Plane Message Configuration for Modulation Compression
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Solution Overview
Problem
Current open radio access network (O-RAN) systems face inefficiencies in processing control plane messages, particularly in specifying common physical resource block information for multiple reference signals, which affects modulation compression and beamforming, leading to increased overhead and processing time.
Innovation Solution
The method involves receiving and processing control plane messages with RS-specific section description extensions that specify PRB offsets and modulation scaling factors, and optionally beamforming information, to optimize modulation compression in O-RAN radio units, and configuring messages to transmit these optimizations to O-RAN distributed units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If common physical resource block information is specified separately for each reference signal in control plane messages, then each reference signal can have precise resource allocation, but the control plane message overhead and processing time increase significantly
Solution Approach 1:
The patent merges the resource allocation information for multiple reference signals into a single common physical resource block specification. Instead of sending separate resource allocation details for each reference signal, the system consolidates these into one unified message that applies to multiple reference signals, thereby reducing control plane overhead while maintaining precise resource allocation.
Solution Approach 2:
The patent creates a universal resource allocation mechanism where a single control plane message structure can serve multiple reference signals simultaneously. The common physical resource block information is designed to be universally applicable across different reference signal types, eliminating the need for redundant message transmissions and improving processing efficiency.
2Productivity
If detailed section description extensions are included for each reference signal, then modulation compression can be optimized per signal, but the control plane message complexity and processing time increase
Solution Approach 1:
The patent segments the resource allocation information into two parts: common physical resource block information that applies to multiple reference signals, and RS-specific section description extensions that provide signal-specific modifications. This segmentation allows the system to maintain optimized modulation compression for each reference signal while avoiding the complexity of fully detailed individual descriptions for every signal.
Solution Approach 2:
The patent applies local quality by providing default common resource allocation information that applies broadly, with optional RS-specific extensions only where needed. This approach optimizes modulation compression for each reference signal locally where differences exist, while using the common specification for the majority of cases, thereby reducing overall message complexity.
3Reliability
If separate processing is performed for each reference signal in the control plane, then signal-specific optimization is achieved, but the overall processing time increases
Solution Approach 1:
The patent implements preliminary action by establishing common physical resource block information in advance that applies to multiple reference signals. This pre-configured common information eliminates the need for separate processing of identical resource allocation details for each reference signal, thereby reducing processing time while maintaining signal-specific accuracy through optional extensions.
Data Source
AI summary
In an aspect, an O-DU transmits a C-Plane message including a section description that specifies common PRB information associated with a plurality of RSs, the section description comprising a set of RS-specific section description extensions that each specify a PRB offset and a modulation scaling factor for a respective RS among the plurality of RSs. The O-RU processes the C-Plane message with modulation compression in accordance with the set of RS-specific section description extensions. In another aspect, a first O-RAN unit (e.g., O-DU or O-RU) transmits a message to a second O-RAN unit (e.g., O-RU or O-DU) associated with combining across symbols at an O-RU.