Serial Bus Transmit/Receive Interface With In-Band PWM Data
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Solution Overview
Problem
Existing serial bus systems require additional terminals for internal communication between the communication control device and the transmit/receive device, leading to high costs and potential reductions in data transfer rates, particularly in high-data-rate applications like CAN XL.
Innovation Solution
A communication control device and transmit/receive device for a serial bus system that integrate additional data into the transmit signal without additional terminals, using pulse-width modulation to encode and decode data within the symbol duration, allowing for high error robustness and increased data rates without reducing transfer frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional terminals are used for internal communication between communication control device and transmit/receive device, then communication functionality is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines the internal communication function with the existing data transmission function by integrating additional data into the transmit signal itself. This merging eliminates the need for separate communication terminals while maintaining both communication functionalities, thereby reducing device complexity without sacrificing adaptability.
Solution Approach 2:
The transmit signal is designed to serve multiple functions simultaneously: it carries both the primary data transmission and the additional control communication between devices. This multi-functionality approach allows a single terminal to handle both purposes, reducing the overall number of terminals required and simplifying device architecture.
2Adaptability or versatility
If additional terminals are added for internal communication, then communication capability is improved, but manufacturing cost increases
Solution Approach 1:
By merging internal communication with data transmission into a single signal path, the patent eliminates the need for additional terminals, directly reducing component count and manufacturing cost while maintaining communication capability.
Solution Approach 2:
The transmit signal structure is designed to be universal, serving both data transmission and device communication purposes. This multi-functionality reduces the bill of materials and assembly complexity, thereby lowering manufacturing costs.
3Quantity of substance
If additional data are inserted into transmit signal, then data transfer capacity is improved, but data rate may be reduced
Solution Approach 1:
The patent employs pulse-width modulation to encode additional data into the transmit signal by varying the width of signal pulses within existing symbol durations. This parameter change approach allows additional data to be transmitted without increasing symbol duration or reducing the fundamental data rate, thereby increasing data transfer capacity while maintaining productivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables high-bit-rate data transfer with error robustness, achieving a net data rate of at least 10 Mbps while maintaining existing transfer frequencies, and supports additional data transfer without additional terminals, thus reducing costs.
Implementation Method 1
the interface module is configured to encode the transmit signal in at least one part of the second communication phase of a message into an encoded transmit signal
Data Source
AI summary
A communication control device. The communication control device has a communication control module for generating a transmit signal for controlling communication of the subscriber station with other subscriber station(s) of the bus system which uses at least one first communication phase and one second communication phase for exchanging messages between subscriber stations of the bus system, and an interface module for encoding the transmit signal in at least one part of the second communication phase of a message into an encoded transmit signal, and for inserting additional data into at least one symbol of the encoded transmit signal. The interface module is configured to insert the additional data into the encoded transmit signal as at least one symbol of the encoded transmit signal serially with the information of the symbol of the transmit signal. The symbol duration of the transmit signal and of the encoded transmit signal is identical.