Secondary Node Configuration Management for Master Node Load Reduction
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Solution Overview
Problem
In the context of 5G NR, the load on the master node (MN) increases during Conditional SCG changes, particularly when determining suitable candidate cells and transmitting configuration information to terminals, leading to potential performance bottlenecks.
Innovation Solution
The implementation involves a secondary node (SN) that transmits configuration information to the master node, allowing the master node to manage and delete this information efficiently, reducing the load by using specific messages for configuration updates and identifier assignments, thereby minimizing the MN's workload during terminal handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the master node determines suitability of candidate cells based on load state and transmits configuration information individually, then the terminal can perform conditional SCG change, but the load on the master node increases
Solution Approach 1:
The patent combines multiple candidate cell configuration information into a single message transmitted by the master node to the terminal. Instead of sending individual configuration messages for each candidate cell, the master node aggregates all candidate cell configurations (including cell identity, frequency, bandwidth, and other parameters) into one consolidated message, thereby reducing signaling overhead and master node processing load while maintaining the terminal's ability to perform conditional SCG change.
Solution Approach 2:
The patent extracts the configuration information management function from the master node and transfers it to the secondary node. The secondary node generates and manages the configuration information of candidate cells under its control, then provides this information to the master node in a ready-to-use format. This extraction reduces the master node's processing burden while ensuring the terminal receives accurate and up-to-date configuration data.
2Loss of information
If the master node includes configuration information of each candidate cell into individual messages, then the terminal receives complete configuration data, but the transmission load on the master node increases
Solution Approach 1:
The patent merges multiple configuration information messages into a single consolidated transmission. The master node aggregates configuration data for all candidate cells (including cell identity, frequency, bandwidth, and other parameters) into one message, reducing the number of transmissions required and thereby lowering the energy consumption and load on the master node while ensuring the terminal receives complete configuration information.
3Ease of operation
If the master node assigns identifiers to configuration information of each candidate cell, then the terminal can identify and select appropriate cells, but the processing load on the master node increases
Solution Approach 1:
The patent extracts the identifier assignment function from the master node and assigns it to the secondary node. The secondary node, which manages the candidate cells under its control, automatically assigns identifiers to its own candidate cell configurations. This extraction eliminates the need for the master node to perform identifier assignment, thereby reducing the master node's processing load while ensuring that identifiers are correctly assigned and can be used by the terminal for cell selection.
Data Source
AI summary
An SN (100C) includes a transmitting unit (110b) that transmits, to an MN (100A) to which a terminal (200) is connected, a first message including configuration information of a cell formed by the SN (100C), and a control unit (140b) that determines to delete the configuration information of the cell according to a state of the cell. The transmitting unit (110b) transmits, to the MN (100A), a second message instructing deletion of the configuration information of the cell.