Route Update Method for Tree Network Topology Signaling Overhead

The patent applies local quality by differentiating which nodes need to update routing information based on their position in the network topology. Instead of uniformly updating all nodes, only the core node and downstream nodes (nodes that actually need the updated routing information to reach the switching relay node) perform updates. This selective approach reduces signaling overhead and data interruption time while maintaining routing synchronization where actually needed.

The patent implements local quality by making the routing update process selective rather than universal. The core node determines which downstream nodes actually require routing information updates based on their position in the topology relative to the switching relay node. This prevents unnecessary signaling messages from being sent to nodes that would not use the updated routing information, thereby reducing signaling overheads and energy consumption.

The patent applies local quality by identifying and updating only those nodes that have actual need for the routing information changes. The core node performs selective propagation of route update messages to downstream nodes based on their topological relationship with the switching relay node. This reduces the number of nodes performing updates while ensuring that all nodes that require the information receive it, maintaining routing information completeness where necessary.