Smart Meter Re-registration via Cached Routing Data
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Solution Overview
Problem
The re-registration process of smart electricity meters in powerline communication networks is lengthy due to the need for repeated message exchanges to update routing and encryption information, leading to delays in returning to an operational state, while also posing challenges in maintaining security and reliability amidst interference and noise issues.
Innovation Solution
The method involves saving routing and encryption information in non-volatile memory during initial registration, allowing for quick retrieval and updating during re-registration, using this information to rapidly re-establish communication in the powerline network, and ensuring security by encrypting the encryption key.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the smart electricity meter performs complete message exchanges to update routing and encryption information during re-registration, then the network security and routing accuracy are improved, but the re-registration time is significantly increased
Solution Approach 1:
The patent applies preliminary action by storing routing and encryption information in non-volatile memory during the initial registration phase. When re-registration is needed, the meter retrieves this pre-stored information instead of performing complete message exchanges, thus reducing re-registration time while maintaining security and routing accuracy through the use of previously validated data
Solution Approach 2:
The patent uses copying by creating and storing copies of routing tables and encryption keys in non-volatile memory during initial registration. These copies are then reused during re-registration events, allowing the system to restore communication quickly without重新 negotiating all parameters, thereby balancing speed with maintained security through encrypted key storage
2Productivity
If the smart electricity meter stores routing and encryption information in non-volatile memory, then the re-registration speed is improved, but the device complexity and security management difficulty are increased
Solution Approach 1:
The patent applies self-service by implementing automatic retrieval and validation of stored routing and encryption information during re-registration. The system autonomously manages the stored credentials without requiring manual intervention or complex external authentication processes, thereby improving re-registration speed while keeping security management straightforward through automated credential verification
Solution Approach 2:
The patent uses disposable short-living objects by implementing periodic renewal of encryption keys and routing information. Instead of managing complex long-term security credentials, the system periodically updates and renews these parameters, allowing simple storage and retrieval of relatively short-lived cryptographic materials that are automatically renewed, thus balancing speed with manageable security complexity
3Productivity
If the smart electricity meter retrieves and updates stored routing information, then the re-registration efficiency is improved, but the risk of using outdated or invalid route information is increased
Solution Approach 1:
The patent applies feedback by implementing validation mechanisms that check the freshness and validity of retrieved routing information during re-registration. The system verifies timestamps, sequence numbers, or other validity indicators of stored routing data before use, and triggers updates if the information is outdated, thus maintaining routing reliability while enabling efficient reuse of valid cached information
Solution Approach 2:
The patent uses dynamics by making the re-registration process adaptive based on the validity state of stored information. The system dynamically determines whether to use pre-stored routing data or perform complete updates based on real-time validation results, allowing efficient reuse of valid information while automatically transitioning to full updates when needed, thereby balancing efficiency with routing information reliability
Data Source
AI summary
A modem of a smart electricity meter obtains, following a registration in the powerline communication network of the ad hoc type, routing information and encryption information, by exchanges of messages in the powerline communication network. The smart electricity meter saves in non-volatile memory the routing information and the encryption information, the routing information being saved in association with information representing an instant at which the backup is made. At the time of a subsequent re-registration of the smart electricity meter following a disconnection of the powerline communication network, the smart electricity meter retrieves the routing and encryption information previously saved in the non-volatile memory, updates it by deleting any route information that is no longer valid, and uses it to communicate in the powerline communication network.