Relay Node Backhaul Recovery Packet Rerouting
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Solution Overview
Problem
In cellular communication systems, existing technologies face challenges in managing backhaul link failures and rerouting data packets efficiently across relay nodes, leading to potential service disruptions and inefficiencies in data transmission.
Innovation Solution
A communication control method is implemented in relay nodes to handle recovery attempt notifications by rerouting packets, adjusting transmission configurations, and broadcasting system information, ensuring seamless data flow and minimizing service interruptions during backhaul link failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay nodes forward packets during backhaul link failure recovery, then data transmission continuity is improved, but transmission errors and interference increase
Solution Approach 1:
The relay node receives a recovery attempt notification from the parent node before actually forwarding packets during the recovery process. This preliminary notification allows the relay node to prepare for packet forwarding in advance, ensuring that when packets need to be transmitted during recovery, the relay node is already configured to handle them appropriately, thereby maintaining data transmission continuity while preparing to mitigate transmission errors.
Solution Approach 2:
The system implements a feedback mechanism where the parent node sends recovery attempt notifications to child nodes (relay nodes). This feedback loop allows relay nodes to be informed about the recovery status and adjust their packet forwarding behavior accordingly. The feedback mechanism enables coordinated action across the network during recovery, improving data transmission continuity while allowing error detection and correction through monitored transmission attempts.
2Reliability
If relay nodes broadcast system information during backhaul link failure, then IAB node identification is improved, but network overhead increases
Solution Approach 1:
The patent extracts and modifies specific information elements from the system information broadcast. Instead of broadcasting complete system information, the relay node selectively includes or excludes specific IAB support indicators based on the recovery status. This extraction approach maintains necessary IAB node identification capabilities while significantly reducing the overall quantity of network overhead by only transmitting essential information during failure recovery periods.
Solution Approach 2:
The system dynamically adjusts the system information broadcast based on the backhaul link recovery status. During failure conditions, the relay node modifies which information elements are included in the broadcast, making the information transmission adaptive rather than static. This dynamic approach ensures IAB node identification remains reliable when needed while minimizing network overhead during recovery operations.
3Object-affected harmful factors
If relay nodes suppress transmission during backhaul link recovery, then transmission errors are reduced, but data transmission efficiency decreases
Solution Approach 1:
Instead of completely suppressing transmission during backhaul link recovery, the system applies partial suppression through selective packet forwarding. The relay node forwards packets only under specific conditions (such as when recovery is successful or when alternative paths are available) while suppressing transmission during problematic recovery phases. This partial action approach reduces transmission errors during critical recovery periods while maintaining data transmission efficiency during stable phases, rather than continuously suppressing all transmission.
Data Source
AI summary
In an aspect, a communication control method is used in a cellular communication system. The communication control method includes receiving, by a relay node, a recovery attempt notification from a first parent node of the relay node. The recovery attempt notification indicates that the first parent node is attempting to recover from a failure having occurred in a backhaul link between the first parent node and a node that is a further parent node of the first parent node. The communication control method includes forwarding, by the relay node in response to reception of the recovery attempt notification, a first packet received from the first parent node to a child node of the relay node and a second packet received from the child node to a second parent node that is a parent node of the relay node.