Cellular Router Failure Notification Packets
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Solution Overview
Problem
In mesh networks, nodes within a cell do not immediately recognize the failure of a cellular router, leading to unreachable status and misdirected data transmission, as existing solutions rely on periodic counters that may not promptly indicate router failure.
Innovation Solution
The implementation of cellular router failure notification packets, transmitted using a randomization function to reduce collisions, which are sent by the router or nodes to announce the failure, triggering a discovery process for nodes to find a new cellular router.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If periodic counters are used to indicate continued presence of cellular router, then device complexity is reduced, but failure detection speed deteriorates
Solution Approach 1:
The patent applies preliminary action by having nodes proactively send failure notification packets to adjacent nodes before the router actually fails or at the moment of failure. This preliminary signaling mechanism allows nodes to be prepared for router failure in advance, eliminating the delay inherent in periodic counter-based detection while maintaining relatively simple device architecture.
2Measurement precision
If nodes wait for periodic counter failure to detect router failure, then measurement precision is improved, but response time deteriorates
Solution Approach 1:
The patent implements feedback by establishing a direct communication mechanism where failed routers or aware nodes immediately send failure notification packets back to adjacent nodes. This feedback loop eliminates the need to wait for periodic counters to expire, providing both accurate failure detection and immediate response time simultaneously.
3Duration of action of stationary object
If nodes continue to transmit data to failed cellular router, then data transmission continuity is maintained, but network reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by having nodes receive and process failure notification packets before attempting to send data to the failed router. This preliminary awareness allows nodes to redirect their data transmission to alternative routers proactively, preventing data loss while maintaining transmission continuity and network reliability.
Data Source
AI summary
Techniques for quick advertisement of a failure of a cellular router in a network are described herein. In one example, problems with the cellular router in the network are recognized, such as by the cellular router itself, or by a node in communication with the cellular router. In response, one or more cellular router failure notification packets are sent by the cellular router prior to failure to one or more nodes within a cell served by the failing cellular router. The cellular router failure notification packets indicate that the cellular router is failing, thereby starting a discovery process in each node, wherein an attempt is made to discover a new cellular router.