Cost-Based Route Selection for IAB Node Migration and Stable Backhaul Links
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Solution Overview
Problem
Future wireless communications networks need to efficiently support a wide range of devices with different data traffic profiles and ensure stable, reliable links between infrastructure equipment, particularly when a node connected to the core network moves or requires a different connection.
Innovation Solution
A migrating communications node determines a second attachment point in the wireless backhaul network, biasing the selection to either intra-donor or inter-donor migration to minimize signaling overhead and service interruption, with the choice made by the donor node or the migrating node.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a migrating communications node changes attachment point from one donor communications node to another (inter-donor migration), then the node can maintain connection stability, but signaling overhead and service interruption increase
Solution Approach 1:
The patent introduces a cost factor parameter that quantifies the impact of inter-donor migration versus intra-donor migration. By assigning different cost values to different migration types, the system can evaluate and select migration paths that minimize service interruption while maintaining connection stability. The cost factor is incorporated into the route selection algorithm to balance reliability and time loss.
Solution Approach 2:
The patent implements dynamic route selection where the migrating node can choose between different attachment points based on real-time network conditions and cost factors. The system dynamically adjusts the migration decision by evaluating multiple candidate routes and selecting the one with the optimal cost, allowing flexible adaptation to changing network states while minimizing service interruption.
2Reliability
If a migrating communications node changes attachment point from one donor communications node to another (inter-donor migration), then the node can maintain connection stability, but signaling overhead increases
Solution Approach 1:
The patent introduces a cost factor parameter that quantifies the impact of inter-donor migration versus intra-donor migration. By assigning different cost values to different migration types, the system can evaluate and select migration paths that minimize signaling overhead while maintaining connection stability. The cost factor is incorporated into the route selection algorithm to balance reliability and complexity.
3Adaptability or versatility
If the network supports a wider range of devices with different data traffic profiles, then device versatility increases, but network complexity increases
Solution Approach 1:
The patent implements a universal cost-based route selection mechanism that can handle diverse device types and traffic profiles through a single unified framework. The cost factor approach provides a multi-functional solution that adapts to different device requirements (e.g., latency-sensitive, bandwidth-intensive) without requiring separate management mechanisms for each device type, thereby reducing overall network complexity while maintaining high versatility.
Data Source
AI summary
A plurality of communications nodes are configured to form a wireless backhaul network to communicate data from a core network of the wireless communications network for transmitting to one or more communications devices or to communicate data to the core network received from the one or more communications devices. At least a first and a second of the plurality of communications nodes are donor communications nodes formed from radio network infrastructure equipment having a physical connection to the core network. According to example embodiments, a migrating communications node determines that it should migrate from a first attachment point in the wireless backhaul network in which the migrating node communicates the data to or from the core network via the first donor communications node. The term “attachment point” is used to express a link of a communications node to other nodes in the backhaul network. The radio communications links are formed to communicate data to and from the core network via donor communications nodes and may be also via one or other nodes according to an established hierarchy of the wireless backhaul network. The migrating communications node determines a second attachment point in the wireless backhaul network to which the migrating communications node should attach to the wireless backhaul network to communicate the data to or from the core network, and the migrating communications node migrates from the first attachment point to the second attachment point. The second attachment point is determined by biasing a selection of the second attachment point either to provide the migrating communications node with radio communications resources from the first donor communications nodes when attached to the wireless backhaul network at the second attachment point as an intra-donor migration, or to provide the migrating communications node with radio communications resources from the second donor communications node when attached to the wireless backhaul network at the second attachment point as an inter-donor migration.