IAB Node Migration Admission Control via Pre-provisioned Configuration
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Solution Overview
Problem
During inter donor migration of an IAB node, existing admission control methods fail to efficiently manage the migration of descendant nodes and their access UEs, leading to communication delays due to the need for individual UE requests and configuration information.
Innovation Solution
A method involving a source base station and a target base station, both with central and distributed units, where configuration information for mobility control is pre-provided to descendant nodes and access UEs, allowing selective admission control during migration by transmitting handover request messages and response messages with configuration details.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If individual UE admission control is performed during IAB node migration, then each UE can be managed separately, but communication delays occur due to multiple individual requests and configuration exchanges
Solution Approach 1:
The patent merges the admission control processes for multiple UEs and descendant nodes into a single collective admission control procedure. Instead of performing individual admission control for each UE, the source base station performs one unified admission control check that covers all affected UEs and nodes, thereby reducing the number of request-response cycles and eliminating redundant communication delays.
Solution Approach 2:
The patent performs preliminary configuration preparation by the target base station before the actual handover. The target base station pre-generates and stores configuration information for all descendant nodes and access UEs in advance, so that when handover is triggered, the configuration can be immediately provided without requiring individual real-time generation or multiple sequential requests.
2Productivity
If configuration information is provided individually to each UE during migration, then specific UE requirements can be met, but communication latency increases due to multiple separate configuration exchanges
Solution Approach 1:
The patent combines multiple separate configuration exchange operations into a single consolidated configuration transfer. The source base station collects configuration information for all descendant nodes and access UEs, then transmits this consolidated configuration data to the target base station in one operation, eliminating the need for multiple separate configuration exchanges and significantly reducing total configuration time.
Solution Approach 2:
The target base station performs preliminary preparation of configuration information before the handover is executed. It pre-generates, validates, and stores all necessary configuration data for descendant nodes and access UEs in advance, ensuring that when the handover is triggered, the configuration can be immediately provided without real-time generation delays.
3Speed
If collective admission control is implemented for descendant nodes and access UEs, then migration speed improves, but individual UE configuration requirements may be compromised
Solution Approach 1:
The patent segments the configuration information into node-specific and UE-specific components within the collective admission control framework. While the admission control itself is performed collectively for all descendants and UEs, the configuration data structure maintains distinct sections for each node and UE, allowing individual UE requirements to be addressed within the unified configuration package without compromising migration speed.
Data Source
AI summary
The disclosure relates to a 5G or pre-5G communication system for supporting a data transmission rate higher than that of a 4G communication system, such as long term evolution (LTE). The present disclosure relates to a method for controlling signal processing in a wireless communication system, and the method may comprise the steps of: receiving a first control signal transmitted from a base station; processing the received first control signal; and transmitting, to the base station, a second control signal generated on the basis of the processing.