LFSR Auto-Crossover Circuit for Unique Network Port Connection
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Solution Overview
Problem
Network devices with the same circuit design and manufacturing batch often generate the same pseudo random numbers, leading to connection failures due to identical initial values and operating periods of internal circuits.
Innovation Solution
Incorporating a linear feedback shift register circuit and a value updating circuit that utilizes exclusive information such as operational or production information to generate unique initial values and set distinct clock signal periods, thereby controlling ports for auto crossover mechanisms in network devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same circuit design and manufacturing batch are used, then production efficiency and consistency are improved, but the likelihood of generating identical pseudo random numbers increases, causing connection failures
Solution Approach 1:
The patent introduces a value updating circuit that modifies specific local parameters (initial values and clock signal periods) of the pseudo random number generator based on exclusive information. This local modification ensures that while the overall circuit design remains consistent for mass production, individual devices have unique operational characteristics that prevent identical random number generation, thereby resolving the contradiction between production consistency and connection reliability
Solution Approach 2:
The patent changes key parameters of the pseudo random number generator - specifically the initial values and clock signal periods - based on exclusive information such as device ID, serial number, or environmental data. By dynamically adjusting these parameters, the system maintains the benefits of standardized circuit design while ensuring that each device generates unique pseudo random sequences, preventing connection failures
2Device complexity
If predetermined operations are used to generate random numbers, then the generation process is simple and fast, but the same random numbers are generated across devices, leading to connection failures
Solution Approach 1:
The patent applies preliminary action by pre-configuring the value updating circuit with exclusive information during device manufacturing or initialization. This exclusive information is stored and automatically used to modify the pseudo random number generator's parameters before operation begins, ensuring uniqueness without adding complex real-time computation during the random number generation process itself
Solution Approach 2:
The value updating circuit acts as an intermediary between the standardized pseudo random number generator and the unique device characteristics. It takes exclusive information as input and transforms it into modified initial values and clock periods, which then feed into the simple predetermined operation circuit, thereby bridging the gap between simplicity and uniqueness
Data Source
AI summary
A network device includes a linear feedback shift register circuit and a value updating circuit. The linear feedback shift register circuit is configured to perform an auto crossover mechanism according to at least one clock signal and a plurality of first bits, in order to control at least one port of a first interface circuit to connect with a second interface circuit. The value updating circuit is configured to perform at least one of a plurality of operations according to exclusive information. The plurality of operations includes: generating a plurality of initial values, in which the value updating circuit is configured to utilize the plurality of initial values to update at least one partial bits of the plurality of first bits; or setting a period of the at least one clock signal, in which the exclusive information includes operational information or production information of the network device.