E2 Node REPORT Subscription Updates for Overlap Reduction

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Solution Overview

Problem

The existing Near-RT RIC and E2 interface specifications face inefficiencies in managing xApp subscriptions, leading to redundant RIC INDICATION messages due to overlapping trigger and action definitions in subscriptions, and the inability to update REPORT type subscriptions without deleting and recreating them, which increases network load.

Innovation Solution

The system allows for updating existing REPORT type subscriptions by sending a message to the E2 Node to modify event trigger or action definitions, and internally merging subscriptions with partially overlapping definitions, reducing redundant messages and enabling dynamic updates.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the system sends separate RIC INDICATION messages for each subscription with overlapping trigger and action definitions, then each subscription is independently managed, but the network load increases due to redundant messages

Engineering Contradiction:

Improvesubscription management accuracyVSAvoidnetwork load

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent merges multiple subscriptions with overlapping trigger and action definitions into a single consolidated subscription. The E2 Node combines duplicate trigger definitions and action definitions into one RIC INDICATION message, reducing the number of messages sent over the network while maintaining the integrity and accuracy of each individual subscription's requirements.

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If the system requires deletion and recreation of REPORT type subscriptions for updates, then subscription definitions can be modified, but the complexity of subscription management increases

Engineering Contradiction:

Improvesubscription update capabilityVSAvoidsubscription management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent introduces dynamic update capability for REPORT type subscriptions by allowing modification of trigger definitions and action definitions without deletion. The system dynamically adjusts subscription parameters through update messages, enabling flexible changes while maintaining continuous subscription validity and reducing management complexity.

Inventive Principle:

Principle #15Dynamics

3Productivity

If the system merges subscriptions with partially overlapping definitions, then the number of RIC INDICATION messages is reduced, but the complexity of detecting and measuring overlapping subscriptions increases

Engineering Contradiction:

Improvemessage reduction efficiencyVSAvoidsubscription overlap detection

Core Design Contradiction:

ProductivityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent implements a feedback mechanism where the E2 Node compares trigger definitions and action definitions of incoming subscriptions against existing subscriptions. The system provides feedback by identifying overlapping characteristics and automatically consolidating subscriptions, reducing the burden of manual detection while maintaining high message reduction efficiency.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250344092A1Computer system, e2 node, and methods therefor

Publication Date: 2025.11.06 NEC CORP

AI summary

A RAN Intelligent Controller (RIC) (1) configures between the RIC (1) and an E2 Node (2) a first subscription to a REPORT service provided by the E2 Node. While the first subscription has already been configured, the RIC (1) sends to the E2 Node (2) a first message requesting an update of one or both of an event trigger definition and an action definition regarding a REPORT action that has been agreed upon in the first subscription. For example, this can provide enhancements to enable the updating of REPORT type subscriptions on the Open Radio Access Network (O-RAN) E2 interface.