Vehicle Communication With Application-Specific Device Certificates
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Solution Overview
Problem
Existing vehicle communication systems face challenges in efficiently and reliably managing device certificates due to their expiration or revocation, leading to complex and unreliable certificate application and confirmation procedures, which result in high retry costs.
Innovation Solution
A communication method and apparatus that reduces information exchange between transportation means and network devices by using device identifiers and application scenario identifiers to issue and verify device certificates, allowing flexible and efficient processing of businesses without unnecessary parameter modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a communication method using only basic service capability information is used, then device complexity is reduced, but communication efficiency deteriorates due to excessive message exchange
Solution Approach 1:
The patent segments service capability information into two distinct types: basic service capability information (maintained by all devices) and enhanced service capability information (maintained only by anchor devices). This segmentation allows simple devices to operate with minimal complexity while enhanced information is available when needed through anchor devices, resolving the contradiction between device complexity and communication efficiency.
Solution Approach 2:
Anchor devices serve as intermediaries that collect and maintain enhanced service capability information from multiple basic devices. When a terminal needs comprehensive service capability information, it queries the anchor device which provides aggregated information, avoiding the need for terminals to communicate with every basic device directly and thus improving communication efficiency without increasing terminal complexity.
2Adaptability or versatility
If enhanced service capability information is collected from all devices, then service capability coverage is improved, but device complexity and resource consumption increase
Solution Approach 1:
The system divides devices into two categories with different functional responsibilities: basic devices that maintain only their own service capability information, and anchor devices that maintain enhanced service capability information aggregating data from multiple basic devices. This segmentation ensures comprehensive service capability coverage is achieved through anchor devices without requiring all devices to have complex information collection and maintenance capabilities.
Solution Approach 2:
Anchor devices perform multiple functions: they act as basic devices for their own service capabilities, simultaneously serve as information aggregation points for enhanced service capability information from multiple basic devices, and provide query services to terminals. This multi-functionality allows comprehensive service capability coverage to be achieved through a subset of devices rather than requiring all devices to have identical complex capabilities.
3Loss of information
If terminals query all basic devices for service capability information, then information completeness is improved, but communication overhead and time consumption increase
Solution Approach 1:
Anchor devices perform preliminary action by proactively collecting and aggregating enhanced service capability information from multiple basic devices in advance. When terminals need comprehensive service capability information, they only need to query the pre-prepared anchor device rather than contacting multiple basic devices sequentially, significantly reducing message exchange time while maintaining information completeness.
Solution Approach 2:
Anchor devices function as intermediaries between terminals and basic devices. Terminals query the anchor device which has already aggregated information from multiple basic devices, eliminating the need for terminals to communicate with each basic device individually. This intermediary approach ensures complete service capability information is obtained while minimizing communication overhead and time consumption.
Data Source
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AI summary
Embodiments of this application provide a communication method and apparatus, and a transportation means. The method includes: sending a first request message to a first network device, where the first request message is used to request the first network device to issue a device certificate, the first request message includes a device identifier and an application scenario identifier, the device identifier identifies a transportation means and/or a component included in the transportation means, the application scenario identifier identifies a use scenario of a first device certificate, and the first device certificate is a certificate used when the transportation means performs a first business; and receiving a first response message sent by the first network device, where the first response message includes a second device certificate, the second device certificate is associated with the device identifier and the application scenario identifier, and the second device certificate is used to process the first business. According to the method, complexity of an overall certificate application and confirmation procedure can be reduced.