Partial and Full Node Migration in IAB Networks
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Solution Overview
Problem
Existing methods for migrating nodes in multi-hop integrated access and backhaul (IAB) deployments lead to waste of radio resources, increased latency, and energy wastage due to inefficient handling of node migrations, particularly during inter-donor topology adaptation and radio link failure recovery.
Innovation Solution
A method involving a first node sending an indication to a second node for partial or full migration of a third node's context for radio resource control, allowing flexible migration and continued network service without disrupting other nodes, by determining the type of migration needed based on load and service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing methods for migrating nodes in multi-hop IAB deployments are used, then node migration can be performed, but radio resources are wasted, latency increases, and energy is wasted due to inefficient handling of node migrations
Solution Approach 1:
The patent applies partial action by implementing two distinct migration approaches: full migration (migrating all contexts including descendant nodes) and partial migration (migrating only the top-level node context). This allows the system to perform only the necessary migration actions required for each specific scenario, avoiding unnecessary energy consumption and resource waste associated with migrating nodes that don't need to be moved.
Solution Approach 2:
The patent changes the migration parameter from a single fixed approach to a variable approach with two modes (full and partial migration). The migration type is dynamically selected based on network conditions, load requirements, and service needs, allowing optimization of energy consumption and migration efficiency by adjusting the migration scope parameter according to actual requirements.
2Productivity
If existing methods for migrating nodes in multi-hop IAB deployments are used, then node migration can be performed, but latency increases due to inefficient handling of node migrations
Solution Approach 1:
By implementing partial migration as an option, the patent allows the system to migrate only the necessary contexts (top-level node only) rather than all contexts including descendant nodes. This partial action approach significantly reduces migration time and latency while still achieving the migration objective, especially in scenarios where full migration is not required.
Solution Approach 2:
The patent segments the migration process into two independent options: migrating only the top-level node context versus migrating the top-level node plus all descendant node contexts. This segmentation allows the system to select the appropriate granularity of migration based on requirements, reducing unnecessary processing time and latency for migrations that don't require full context transfer.
3Productivity
If existing methods for migrating nodes in multi-hop IAB deployments are used, then node migration can be performed, but service disruptions occur during inter-donor topology adaptation and radio link failure recovery
Solution Approach 1:
The patent implements preliminary action by establishing a proxy mechanism at the target donor before full migration is completed. The proxy don or temporarily handles traffic and control functions during the transition period, ensuring service continuity and preventing disruptions during inter-donor topology adaptation and radio link failure recovery scenarios.
Solution Approach 2:
The patent introduces a proxy don or as an intermediary element during the migration process. This intermediary temporarily assumes the role of the migrating node, maintaining service continuity and preventing disruptions while the actual migration is in progress. The proxy mechanism ensures that traffic flow and control functions remain uninterrupted during the transition from source to target donor.
4Adaptability or versatility
If flexible migration types (partial or full) are implemented, then migration can be optimized for load and service requirements, but device complexity increases due to multiple migration modes
Solution Approach 1:
The patent applies dynamics by making the migration type (full or partial) adaptable and changeable based on network conditions, load requirements, and service needs. The system can dynamically select the appropriate migration mode rather than being fixed to a single approach, allowing optimization for different scenarios while managing complexity through conditional logic rather than multiple independent systems.
Solution Approach 2:
The patent manages complexity by changing a single key parameter (migration type) rather than implementing fundamentally different migration systems. The two migration modes (full and partial) are variations of the same basic migration process, controlled by a parameter that determines the scope of migration. This approach provides flexibility while avoiding the complexity of completely separate migration mechanisms.
Data Source
AI summary
A performed by a first node (111). The method is for handling migration of a node. The first node (111) operates in a communications network (100). The first node (111) sends (1003) an indication to a second node (112) comprised in the communications network (100). The indication indicates a context of a third node (113). The third node (113) is comprised in the communications network (100) and is to be migrated from the first node (111) to the second node (112). The context is for control of radio resource. A content of the indication is based on whether the migration of the third node (113) is to be partial or full. The sending (1003) of the indication is performed in response to a first indication received from the second node (112). The first indication requests the context of the third node (113) from the first node (111).