Telematics Band Control via Dynamic Memory Switching
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Solution Overview
Problem
Vehicle telematics units often experience delays due to attempting to use the most up-to-date cellular protocols that are not supported by local providers, leading to high latency in communication services.
Innovation Solution
A method for remotely changing the cellular protocol used by a vehicle's network access device, involving storing and erasing identities of cellular bands in a non-volatile memory, allowing the device to switch between up-to-date and less sophisticated protocols based on available service quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the vehicle telematics unit uses the most up-to-date cellular protocol by default, then data transfer speed and latency are optimized when the protocol is supported, but communication delays occur when the local provider does not support the protocol
Solution Approach 1:
The system dynamically switches between different cellular protocols based on real-time network conditions and provider support. The telematics unit can transition from attempting to use the most up-to-date protocol to falling back on less sophisticated protocols when needed, and vice versa when better protocols become available, making the system adaptable rather than static
Solution Approach 2:
The system changes the cellular protocol parameter based on environmental conditions (provider support). By storing identities of multiple cellular bands and protocols, and selectively activating them based on local provider capabilities, the system optimizes performance by adjusting which protocol is used without requiring physical hardware changes
2Reliability
If the vehicle telematics unit attempts to establish service using the default up-to-date cellular protocol, then optimal performance is achieved when supported, but service establishment delays occur when the protocol is not supported
Solution Approach 1:
The system performs preliminary actions by storing identities of multiple cellular bands and protocols in advance. Before attempting to establish service, the system can quickly determine which protocols are available and switch to an appropriate one, rather than trying a single protocol and failing
Solution Approach 2:
The system uses feedback from network registration attempts to determine whether the current protocol is working. When the telematics unit attempts to register with the network using the up-to-date protocol and receives indication of failure or unavailability, it feedbacks this information and switches to an alternative protocol, creating a closed-loop adaptive system
Data Source
AI summary
A system and method of remotely changing use of a cellular protocol at a vehicle includes: storing, in a network access device (NAD) at the vehicle, identities of one or more cellular bands that provide cellular service according to an up-to-date cellular protocol; wirelessly receiving at the vehicle a computer-readable instruction that deactivates the up-to-date cellular protocol; and in response to the computer-readable instruction, the vehicle: obtains the identities of the cellular bands stored in the NAD; stores the obtained identities in a non-volatile memory device located apart from the NAD; and erases in the NAD the identities of the cellular bands that provide cellular service according to an up-to-date cellular protocol.