Gateway Mode Data Filtering for Vehicular Network Power Management
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Solution Overview
Problem
In vehicular communications systems with multiple gateway units connecting multiple networks, managing the operating mode of control units between high and low power consumption modes becomes complex, leading to difficulties in transitioning control units to low power consumption mode due to data exchange issues between gateway units.
Innovation Solution
The system structures control units into groups connected via communications lines with multiple gateway units, where each control unit sends its operating mode data to one network and receives high power consumption mode data from another, preventing data exchange between gateway units, allowing each control unit to rapidly transition to low power consumption mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple gateway units are used to connect multiple networks, then the system can handle increased number of control units and data communications, but data exchange between gateway units causes control units to be unable to transition to low power consumption mode
Solution Approach 1:
The patent extracts the problematic data exchange function between gateway units and removes it. Specifically, gateway units are configured to not forward operating mode data received from other gateway units, thereby eliminating the circular data exchange that prevented mode transitions while preserving the core gateway function of connecting multiple networks
Solution Approach 2:
The patent applies local quality by giving different behavior rules to gateway units based on their data source. When a gateway unit receives operating mode data from a control unit, it forwards this data to other networks. However, when it receives the same type of data from another gateway unit, it does not forward it. This selective forwarding based on data source resolves the contradiction
2Device complexity
If one gateway unit manages operating modes for all networks, then mode management is simplified, but the system cannot scale when the number of networks increases
Solution Approach 1:
The patent segments the gateway function across multiple independent gateway units, each capable of managing operating mode data for the networks it connects. This distributes the management burden and allows the system to scale by adding more gateway units as needed, while maintaining the simplicity of automatic mode propagation through the segmented architecture
3Speed
If gateway units forward all operating mode data to all connected networks, then mode information is propagated quickly, but control units cannot transition to low power consumption mode due to continuous high mode signals
Solution Approach 1:
The patent removes the problematic forwarding action from gateway units when the data source is another gateway unit. By extracting this specific forwarding behavior, the system prevents the propagation of conflicting high power consumption mode signals that would block mode transitions, while maintaining rapid propagation of legitimate mode changes from control units
Data Source
AI summary
In a case that a gateway unit connected with multiple networks receives mode managing data indicating an operating mode from a first network, the gateway unit sends mode managing data formed based on the received mode managing data only to control units and a gateway unit connected with a second network excluding the first network. This prevents both the gateways units from repeatedly exchanging mode managing data indicating a normal operating mode. Each control unit thereby rapidly transfers to a low power consumption mode when being able to operate in the low power consumption mode.