Conditional Secondary Node Change in 5G Mobile Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The 5G mobile communication system faces challenges in efficiently managing conditional secondary node changes due to the need for high data rates and reduced latency, particularly with the introduction of millimeter wave frequencies, where techniques like beamforming and massive MIMO are used to mitigate propagation loss, but existing methods struggle with optimal secondary base station reconfiguration.
Innovation Solution
A method and apparatus for conditional secondary node change in a mobile communication system, where a base station transmits control messages for SGNB addition requests, receives responses, performs SGNB release procedures, and transfers data, allowing for conditional reconfiguration of secondary nodes based on measurement results and execution conditions to optimize network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conditional secondary node change is implemented to optimize network performance, then data transfer rates and network efficiency are improved, but the complexity of base station control and reconfiguration procedures increases
Solution Approach 1:
The patent implements conditional reconfiguration by preparing alternative secondary node configurations in advance and storing them in the UE. When specific conditions are met (such as measurement thresholds), the pre-prepared reconfiguration can be executed immediately without lengthy negotiation procedures, thus improving data transfer rates while managing control complexity through advance preparation.
Solution Approach 2:
The patent introduces a conditional reconfiguration message as an intermediary mechanism between the base station and UE. This message carries pre-configured secondary node information that can be activated under specific conditions, serving as a mediator that simplifies the overall control procedure by avoiding repeated complex negotiations during actual handover execution.
2Loss of time
If immediate reconfiguration is performed to reduce latency, then response time is improved, but the reliability of data transfer may deteriorate due to potential data loss during transition
Solution Approach 1:
The patent performs data forwarding and buffer status transfer from the source secondary node to the target secondary node before the actual reconfiguration takes effect. This preliminary data preparation ensures that when immediate reconfiguration occurs, no data is lost during the transition, thus reducing latency while maintaining data transfer reliability.
Solution Approach 2:
The patent implements a cushioning mechanism by completing all necessary data forwarding, status transfer, and resource allocation preparations before the reconfiguration execution point. This beforehand cushioning ensures that the rapid transition does not compromise data integrity, protecting against potential data loss that would normally occur during immediate handover.
3Adaptability or versatility
If conditional reconfiguration with multiple procedures is implemented, then adaptability to different network conditions is improved, but the number of signaling messages and procedure steps increases
Solution Approach 1:
The patent merges multiple reconfiguration procedures into a single conditional reconfiguration message that contains all necessary information for secondary node changes. By combining what would otherwise be separate signaling exchanges into one comprehensive message, the system achieves adaptability to different network conditions while minimizing the increase in procedure complexity.
Solution Approach 2:
The conditional reconfiguration message serves multiple functions simultaneously: it carries measurement configuration, threshold information, target node details, and execution conditions. This multi-functional approach allows the system to adapt to various network conditions through a single versatile mechanism rather than requiring separate specialized procedures for each scenario.
Data Source
AI summary
A method and apparatus for secondary base station change in a mobile communication system with multiple are provided. Method for secondary node change includes transmitting to a target SN a control message requesting conditional secondary node change, receiving from the target SN a Xn message including conditional secondary node change information, transmitting to a terminal LTE DL message for conditional secondary node change, receiving from the terminal a 1st LTE UL message including a transaction identifier, receiving from the terminal a conditional reconfiguration identifier and transmitting to a source SN a control message for data forwarding.