Dual Connectivity RRC Segmentation Across Coordinated Nodes
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Solution Overview
Problem
Current technologies lack methods for handling RRC segmentation in dual connectivity scenarios, including multi-RAT dual connectivity, with unclear roles for MN and SN in segmentation, lack of interaction protocols, and undefined UE requirements for segmentation support.
Innovation Solution
A method for coordinating RRC segmentation among multiple nodes in dual connectivity scenarios, where the decision to segment messages is based on message size, node segmentation support, and node capabilities, ensuring consistent segmentation and optimized resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If RRC messages are segmented to exceed PDCP SDU size limits, then large RRC messages can be transmitted, but coordination complexity among multiple nodes increases
Solution Approach 1:
The RRC message is divided into multiple segments that can be transmitted separately over the air interface. Each segment is independently manageable, allowing large messages to be sent while reducing the burden on any single transmission instance and simplifying node coordination.
Solution Approach 2:
The Master Node performs preliminary actions by determining segmentation requirements before transmission, deciding which segments to send via MN and which via SN, and preparing the segmentation strategy in advance to coordinate multi-node transmission efficiently.
2Adaptability or versatility
If segmentation is implemented in dual connectivity scenarios, then message transmission flexibility improves, but node capability alignment requirements increase
Solution Approach 1:
The system incorporates feedback mechanisms where the MN determines segmentation based on SN capability information. The SN's segmentation support status is fed back to the MN, which then adjusts the segmentation strategy accordingly, ensuring reliable coordination while maintaining flexibility.
Solution Approach 2:
The segmentation approach is made dynamic rather than static. The MN can adapt the segmentation strategy in real-time based on current network conditions, SN capabilities, and message requirements, allowing the system to optimize between flexibility and reliability based on actual operational context.
Data Source
AI summary
A method performed by a first node. The method is for handling a message to a third node. The message comprises content from at least a first second node of one or more second nodes. The first node handles a radio communication with the third node in coordination with the one or more second nodes. The first node sends the message to the third node, segmented or not segmented. Whether the message is sent segmented or not segmented is based on: i) whether or not a size of the message exceeds a size limit, ii) whether or not the third node supports segmentation of messages, iii) whether or not the first node supports segmentation of messages, and iv) whether or not at least the first second node of the one or more second nodes supports segmentation of messages.