Dual Error Check Mechanism for Wireless Packet Integrity
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Solution Overview
Problem
Current wireless communication systems lack effective error protection mechanisms, particularly in sub-1-GHz frequency ranges, where existing error detection codes and bit error rate measurements are insufficient to ensure reliable data transmission.
Innovation Solution
The proposed solution involves generating and using two error check values for wireless packets: a first error check value based on the packet's remaining portion and a second error check value based on known information, allowing for robust error detection and reconstruction of expected values, with packets being discarded if either check fails or the reconstructed value differs from the expected value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional single error check value (CRC) is used for packet verification, then the error detection mechanism is simple and computationally efficient, but residual errors remain undetected in severe interference environments
Solution Approach 1:
The error verification process is segmented into two independent checks: first error check comparing the first error check value with a locally generated value, and second error check comparing the reconstructed value with an expected value. This segmentation allows comprehensive error detection without requiring a single complex verification mechanism.
Solution Approach 2:
The patent introduces a second dimension of error checking by verifying not only the packet data integrity (first error check) but also the correctness of reconstructed information (second error check). This dimensional approach to error detection significantly improves reliability in severe interference environments.
2Reliability
If additional error protection mechanisms are implemented, then error detection reliability is improved, but processing overhead and computational complexity increase
Solution Approach 1:
The transmitter pre-calculates and embeds both the first error check value (based on packet remaining portion) and the second error check value (based on known information) into the packet before transmission. This preliminary action enables the receiver to perform verification without time-consuming recalculation of error check values during reception.
Solution Approach 2:
The receiver utilizes information already present in the packet (error check values and other transmitted information) to perform self-verification through two error checks. This self-service approach eliminates the need for additional external verification mechanisms or repeated transmissions.
3Reliability
If error detection sensitivity is increased to detect all possible errors, then transmission reliability improves, but false rejection rate increases
Solution Approach 1:
The patent applies two sequential error checks, where the first error check provides primary verification and the second error check provides additional verification of reconstructed information. This partial redundancy approach ensures high detection accuracy while maintaining reasonable acceptance rates for valid packets.
Data Source
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AI summary
Certain aspects of the present disclosure provide methods and apparatus for enhancing error protection for wireless transmissions.