Electronic Control Unit Frame Allocation for Bus Load Reduction
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Solution Overview
Problem
The increasing demand for efficient data transmission in vehicle networks, such as CAN, leads to higher bus loads, necessitating a solution to reduce communication system bus load without requiring additional transmission frames.
Innovation Solution
An electronic control unit that allocates secondary data into empty areas of existing transmission frames, allowing for efficient use of previously unused space, thereby reducing the need for additional frames and minimizing bus load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If additional transmission frames are used to transmit increased data quantity, then data transmission capacity is improved, but bus load increases
Solution Approach 1:
The patent merges first data and second data into a single transmission frame by allocating second data to empty areas within the frame structure. This combining approach allows increased data transmission capacity without requiring additional frames, thereby avoiding the increase in bus load that would result from using more separate transmission frames.
Solution Approach 2:
The patent utilizes the empty area dimension within the existing frame structure that was previously unused. By allocating second data to this underutilized spatial dimension within the frame, the system increases transmission capacity without expanding the number of frames transmitted on the bus.
2Loss of energy
If empty areas in transmission frames are utilized for additional data, then bus load is reduced, but data structure complexity increases
Solution Approach 1:
The patent segments the transmission frame into distinct allocation areas: a first area for first data and a second area (empty area) for second data. This segmentation provides a clear structural framework that manages complexity by defining specific regions for different data types, making the combined structure more manageable despite the increased information density.
Solution Approach 2:
The patent introduces allocation information as an intermediary element that manages the relationship between first data and second data within the frame. This allocation information serves as a mediator that organizes the combined data structure, enabling the receiver to properly interpret the mixed data without requiring complex ad-hoc parsing logic.
3Productivity
If second data is allocated to empty areas of transmission frames, then data transmission efficiency is improved, but identification and restoration complexity increases
Solution Approach 1:
The patent performs preliminary allocation of second data to specific empty areas within the transmission frame before transmission. By pre-organizing the data layout and establishing allocation patterns in advance, the system enables more efficient transmission while providing the receiver with predictable structures to follow during identification and restoration, thereby reducing the actual processing complexity during operation.
Data Source
AI summary
An electronic control unit provides a transmission node in a communication system in which the transmission node stores first data in a transmission frame having a predetermined format and transmits the first data to a network, and a reception node receives the first data as a reception frame via the network. The electronic control unit includes: an allocation unit that divides second data into a plurality of split data items, and allocates the split data items to an empty area of the transmission frame other than an area where the first data is allocated; and a transmission unit that transmits the spilt data items allocated by the allocation unit and the first data as the transmission frame.