IAB Relay Node F1 Connection Mapping for Donor Migration
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Solution Overview
Problem
In integrated access and backhaul (IAB) networks, determining a target donor node for distributed unit migration to establish an F1 connection is a critical issue that affects network robustness and load balancing.
Innovation Solution
A communication method and apparatus that enables a relay node to determine a target donor node for F1 connection by using configuration information provided by an OAM device, which includes identification and address information of candidate nodes, allowing the relay node to establish a stable and flexible connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If distributed unit migration is implemented to enhance network robustness and load balancing, then network robustness and load balancing are improved, but the complexity of determining the target donor node increases
Solution Approach 1:
The OAM device pre-configures mapping relationships between parent nodes and candidate target donor nodes before migration occurs. This preliminary configuration eliminates the need for real-time complex determination, allowing the relay node to directly query and establish connections based on pre-established mappings.
Solution Approach 2:
The OAM device acts as an intermediary that provides configuration information containing the mapping relationships between parent nodes and candidate donor nodes. This intermediary configuration simplifies the relay node's task from complex determination to straightforward query and execution.
2Adaptability or versatility
If multiple candidate target donor nodes are configured to improve flexibility, then service flexibility is enhanced, but the complexity of selecting the appropriate target increases
Solution Approach 1:
The OAM device pre-configures multiple candidate target donor nodes and their mapping relationships with parent nodes before migration is needed. This allows the relay node to have multiple pre-vetted options ready, eliminating the complexity of real-time selection among multiple candidates.
Solution Approach 2:
The relay node queries the OAM device for configuration information containing the mapping relationships, receiving feedback about which candidate donor nodes are appropriate for specific parent nodes. This feedback mechanism guides the relay node to the correct target without complex independent determination.
Data Source
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AI summary
A communication method and a communication apparatus may be applied to an integrated access and backhaul (integrated access and backhaul, IAB) network, so that a relay node can determine a target donor node to establish an F1 connection, to help improve service stability and flexibility. The method may include: receiving first configuration information from an operation, administration, and maintenance device, where the first configuration information includes identification information of P parent nodes and address information of M candidate target donor nodes, and there is a correspondence between the identification information of the P parent nodes and the address information of the M candidate target donor nodes; when it is determined to perform distributed unit migration, determining, based on the first configuration information, address information of a target donor node corresponding to identification information of a current parent node; and establishing an F1 connection to the target donor node based on the address information of the target donor node.