IAB Node Migration With Conflict-Free Resource Coordination
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing the migration of integrated access and backhaul nodes between parent nodes without conflicts in communications, leading to potential interference and inefficiencies in resource allocation.
Innovation Solution
A method and apparatus for a first integrated access and backhaul (IAB) donor central unit (CU) to transmit a resource configuration to a second IAB donor CU to initiate the migration of an IAB node from a first parent node to a second parent node, receiving an indication that communications will not conflict, and migrating the node accordingly, ensuring seamless transitions and resource compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If IAB node migration is initiated without resource configuration coordination, then migration speed is improved, but communication conflicts and interference occur
Solution Approach 1:
The patent applies preliminary action by having the source IAB donor CU transmit the resource configuration of the first cell to the target IAB donor CU before the IAB node actually migrates. This advance preparation allows the target side to assess resource compatibility and provide feedback on potential conflicts, ensuring that the migration can proceed without communication interference while maintaining efficient migration speed.
2Reliability
If resource configuration is transmitted and coordinated between IAB donor CUs, then communication conflicts are reduced, but signaling overhead and processing time increase
Solution Approach 1:
The patent extracts only the essential resource configuration information needed for conflict assessment from the complete cell configuration, transmitting specifically the resource configuration parameters between IAB donor CUs. This selective extraction approach provides sufficient information for reliability assessment while minimizing signaling overhead and processing time, balancing coordination thoroughness with efficiency.
3Adaptability or versatility
If IAB node migrates to a new parent node without resource compatibility verification, then migration flexibility is improved, but resource conflicts and interference increase
Solution Approach 1:
The patent implements feedback by having the target IAB donor CU assess the transmitted resource configuration and provide feedback information to the source IAB donor CU about potential conflicts. This feedback mechanism allows the migration process to maintain high flexibility in node selection while ensuring resource compatibility, as the feedback enables informed decisions about whether to proceed with the migration to a specific parent node.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first integrated access and backhaul (IAB) donor central unit (CU) may transmit, to a second IAB donor CU, a resource configuration of a first cell served by an IAB node to initiate a migration of the IAB node from a first parent node to a second parent node serving a second cell associated with the second IAB donor CU. The first IAB donor CU may receive, from the second IAB donor CU, an indication that communications performed by the IAB node associated with the first cell will not conflict with communications with the second parent node serving the second cell. The first IAB donor CU may migrate the IAB node to the second parent node based at least in part on the indication. Numerous other aspects are described.