DNS-Based Certificate Pool Routing for Plug and Charge Handshakes
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Solution Overview
Problem
Conventional Plug and Charge systems face inefficiencies in quickly identifying certificates associated with an identifier from multiple certificate pools, which is crucial for the timely handshake between Electric Vehicles and charging stations.
Innovation Solution
Utilizing the Domain Name System (DNS) as a reference engine, the method generates fully qualified domain names based on user and charge provider identifiers, allowing for direct routing to the correct pool operator, thereby reducing the need for extensive database queries and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional Plug and Charge systems query each certificate pool through REST API to locate certificates, then certificate retrieval is possible, but the process requires many queries (potentially thousands) and consumes excessive time and computing resources
Solution Approach 1:
The patent introduces a Domain Name System (DNS) as an intermediary between the charge point operator and certificate pools. Instead of directly querying multiple certificate pools through REST APIs, the system uses DNS to resolve the identifier to the appropriate pool operator's domain name, which then directs the query to the correct pool. This intermediary mechanism dramatically reduces the number of queries needed and accelerates certificate retrieval while maintaining reliability.
2Speed
If a large database storing all vehicle identifiers and pool operator links is maintained, then direct certificate location is possible, but the database requires vast computing resources and extensive maintenance
Solution Approach 1:
The patent leverages the existing Domain Name System (DNS) infrastructure for a specialized purpose (certificate pool location). DNS is a universal, globally distributed system already optimized for fast lookups and automatic maintenance. By repurposing DNS to store mappings between identifiers and pool operator domain names, the system achieves fast certificate location without maintaining a separate large database, thereby reducing device complexity and maintenance burden while preserving speed.
3Reliability
If multiple certificate pools are queried sequentially through REST API, then the correct certificate can be found, but the process exceeds the strict time limit for vehicle-charging station handshake
Solution Approach 1:
The patent performs preliminary organization of certificate pool information by using DNS to pre-establish the mapping between identifiers and pool operator locations. This preliminary structuring allows the system to directly resolve the correct pool operator without sequential querying during the handshake process. The DNS resolution happens in advance and is cached, enabling rapid retrieval during the actual charging handshake, thus maintaining accuracy while dramatically improving productivity.
Data Source
AI summary
A method and system for improving the efficiency of locating a pool operator in a Plug and Charge ecosystem. The method includes receiving an identifier associated with a user, using a Domain Name System (DNS) as a reference engine for the received identifier, generating a fully qualified domain name using the received identifier, and directing the fully qualified domain name to an internet address of a corresponding pool operator. The system includes one or more processors, a DNS, a fully qualified domain name generator, and a directing module. A non-transitory computer-readable medium storing instructions for performing the method is also disclosed.