Wireless Frame Reception Stop Using MAC Header FCS
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Solution Overview
Problem
Existing wireless communication technologies struggle with correctly identifying frames that are not destined for the receiving device, leading to unnecessary frame reception and missed opportunities for frames intended for the device, due to the need to demodulate frames to the end and compare checksums, which can result in inefficient data handling.
Innovation Solution
The implementation of a control unit that uses a MAC header calculation result as an index to determine frame reception stop, storing this information in the physical layer of the PLCP header to ensure backward compatibility, allowing for the reception of frames that are destined for the device, and transmitting a signal to stop the reception of frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fields for storing error detection codes are newly provided at the ends of packet headers, then error detection capability is improved, but devices not capable of recognizing these new fields cannot correctly demodulate received frames
Solution Approach 1:
The patent segments the error detection function into two parts: FCS for the entire frame (maintaining backward compatibility) and a new FCS field specifically for the MAC header (enabling early error detection). This segmentation allows legacy devices to continue using the original FCS while new devices can utilize both FCS values for enhanced error detection capability.
Solution Approach 2:
The patent performs error detection on the MAC header FCS field before complete frame reception. By calculating and comparing the MAC header FCS early in the reception process, the system can identify header errors and stop frame reception prematurely, avoiding waste of resources on frames with corrupted headers.
2Measurement precision
If error detection is performed by demodulating all the way to the last end of frames and comparing checksums, then accurate error detection is achieved, but reception time and resource allocation are delayed
Solution Approach 1:
The patent performs preliminary error detection by calculating the FCS of the MAC header as soon as it is received, before the entire frame is demodulated. This allows early identification of erroneous frames and enables the system to stop reception prematurely, significantly reducing the average frame reception time while maintaining accurate error detection.
Solution Approach 2:
Instead of requiring complete frame demodulation for error detection, the patent applies partial action by performing error detection only on the MAC header portion using the new FCS field. This partial detection is sufficient to identify most error cases without the time cost of processing the entire frame.
3Productivity
If frames are discarded when errors are detected or when not destined for own device, then resource allocation efficiency is improved, but frames may be discarded before destination determination is complete
Solution Approach 1:
The patent performs preliminary validation of the MAC header using the new FCS field before proceeding to destination address checking. By verifying header integrity first, the system ensures that subsequent destination determination is based on valid data, preventing premature or incorrect discarding of frames.
Solution Approach 2:
The patent segments the frame validation process into distinct stages: first validating the MAC header using the new FCS, then checking the destination address. This segmentation ensures that each validation step is performed on verified data, improving both reliability and efficiency of frame handling.
Data Source
AI summary
A communication system is a communication system that includes first and second information processing devices. The first information processing device performs control such that a signal (which is a signal having backward compatibility) serving as an index by which the second information processing device receiving a frame stops the reception of the frame is transmitted to the second information processing device. The second information processing device performs control such that the reception of the frame is stopped based on the signal (which is a signal having backward compatibility) serving as an index by which reception of the frame is stopped when the frame transmitted from the first information processing device is received.