IAB RRC Message Control During Node Migration Handover
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Solution Overview
Problem
In integrated access and backhaul networks, existing technologies face challenges in efficiently managing radio resource control messages during node migration, leading to potential network interruptions and inefficiencies due to the need for reconfiguration after migration, particularly in scenarios involving changes in donor distributed units.
Innovation Solution
A method and apparatus for controlling radio resource control message transmissions in integrated access and backhaul networks, where a donor central unit determines and transmits configurations for enabling or discarding such messages based on identity and connectivity conditions, ensuring seamless handover and minimizing network disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If node migration is performed in IAB network, then network flexibility and deployment efficiency are improved, but network interruptions and inefficiencies occur due to reconfiguration requirements
Solution Approach 1:
The donor central unit pre-configures multiple radio resource control message templates (first template, second template, third template) with different configuration parameters before node migration occurs. This preliminary preparation enables the target node to immediately switch to appropriate pre-configured templates upon migration, avoiding reconfiguration delays and maintaining network continuity.
2Reliability
If radio resource control messages are transmitted during node migration, then message transmission continuity is maintained, but network latency increases due to reconfiguration processes
Solution Approach 1:
The system dynamically selects which radio resource control message template to use based on the migration status and target node configuration. The donor central unit transmits different message templates (first, second, or third) depending on whether the target node belongs to a first or second donor distributed unit, enabling adaptive message transmission that avoids unnecessary reconfiguration and reduces latency.
3Adaptability or versatility
If reconfiguration is performed after node migration, then network topology is updated correctly, but network interruptions occur during the reconfiguration process
Solution Approach 1:
Multiple radio resource control message templates with different topology configurations are prepared in advance. The templates include first template for first donor distributed unit scenarios, second template for second donor distributed unit scenarios, and third template as alternative configuration. This preliminary preparation allows immediate topology update upon migration without interruption.
4Measurement precision
If multiple message templates are configured for different scenarios, then message transmission accuracy is improved, but system complexity increases
Solution Approach 1:
Different radio resource control message templates are designed with specific configuration qualities suited for different scenarios. The first template is optimized for first donor distributed unit connections, the second template for second donor distributed unit connections, and the third template provides alternative configuration. Each template has localized configuration parameters matched to its specific use case, improving transmission accuracy while keeping individual templates relatively simple.
Data Source
AI summary
Disclosed are methods for controlling message transmissions in an integrated access and backhaul network. An example method may include: determining, by a donor central unit in an integrated access and backhaul network, at least one configuration for controlling a transmission of at least one radio resource control message from a node to a child node of the node in the integrated access and backhaul network; and transmitting, by the donor central unit the at least one configuration to the node. Related apparatuses and computer readable media are also disclosed.