Relay Node Failure Notification Overhead Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In cellular communication systems, existing methods face challenges in efficiently managing radio link failures in dual connectivity scenarios, particularly in reducing overhead in failure detection notifications and effectively handling changes in routing configurations during backhaul link failures.
Innovation Solution
A communication control method is implemented in a relay node with dual connectivity, where the node detects radio link failures and transmits specific failure detection notifications to child nodes, including additional information such as destination BAP addresses instead of unavailable routing IDs to reduce overhead, and performs predetermined actions based on received failure notifications, canceling these actions when routing configurations change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the relay node transmits detailed failure detection notifications including unavailable routing IDs to child nodes, then the child nodes can accurately identify failed routes, but the notification overhead increases
Solution Approach 1:
The patent extracts only the essential information (destination BAP address) from the complete failure information (unavailable routing ID with full path details). By transmitting only the destination address rather than the entire routing ID structure, the system maintains the child node's ability to identify failed routes while significantly reducing the notification message size and overhead.
Solution Approach 2:
Instead of transmitting the unavailable routing ID directly (which contains path information), the patent inverts the approach by transmitting the destination BAP address that the routing ID would have pointed to. This allows child nodes to infer the failed route by comparing received destinations with their routing tables, achieving the same failure detection goal with reduced overhead.
2Reliability
If the relay node maintains predetermined actions for failure scenarios, then the response to failures is faster and more reliable, but the system complexity increases when routing configurations change
Solution Approach 1:
The patent implements a feedback mechanism where the relay node monitors routing configuration changes from parent nodes and compares them against stored predetermined actions. When a configuration change is detected, the system automatically updates or cancels appropriate predetermined actions, ensuring that failure responses remain aligned with current routing topology without requiring manual reconfiguration.
Solution Approach 2:
The patent makes the predetermined actions dynamic by allowing them to be automatically updated when routing configurations change. Instead of static failure response procedures, the system dynamically adjusts the predetermined actions based on current routing information, enabling fast failure response while adapting to topology changes without increasing manual management complexity.
Data Source
AI summary
In a first aspect, a communication control method is used in a cellular communication system. The communication control method includes, by a relay node, including additional information in a failure occurrence notification indicating occurrence of a failure in a first backhaul link between a first parent node and the relay node, and transmitting the additional information to a child node. The communication control method includes receiving, by the child node, the failure occurrence notification including the additional information. Here, the additional information includes a first BAP routing ID unavailable due to the failure and/or a first destination BAP address included in the first BAP routing ID, and includes identification information indicating that the additional information includes the BAP routing ID and/or the first destination BAP address.