Full-Duplex Wireless Channel Reservation via Header Integrity Checks
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Solution Overview
Problem
In wireless networking, existing technologies face challenges in managing interference between nodes, particularly in full-duplex operations where receiving nodes are unable to reserve channels effectively due to the lack of early integrity checks, leading to potential interference from transmitting nodes out of range.
Innovation Solution
Incorporating an integrity check field in the frame header of media access control frames, allowing receiving nodes to perform an integrity check and reserve wireless network channels proactively, even during full-duplex operations in license exempt spectra.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If receiving nodes perform integrity checks only after complete frame reception, then interference from out-of-range transmitting nodes occurs, but performing early integrity checks requires modifying frame structure to add check fields
Solution Approach 1:
The patent performs integrity checks on the frame header before receiving the complete data frame. By checking the integrity of the header portion first, the receiving node can identify and discard frames from out-of-range transmitters before processing the entire frame, thus preventing interference while using the existing frame structure without adding new fields
Solution Approach 2:
The patent extracts the integrity check operation from the post-reception processing stage and applies it to the frame header portion during reception. This allows early identification of valid frames without requiring modifications to the overall frame structure or adding additional check fields
2Productivity
If receiving nodes reserve channels proactively before data transmission, then channel reservation efficiency improves, but interference management becomes more complex in full-duplex operations
Solution Approach 1:
The patent enables receiving nodes to perform integrity checks on the frame header during reception and proactively reserve channels before the complete data transmission occurs. This preliminary channel reservation based on header validation improves efficiency by avoiding wasted reservation attempts on invalid frames, while the selective approach based on integrity check results keeps interference management manageable
Solution Approach 2:
The patent uses the result of the integrity check on the frame header as feedback to determine whether to proceed with channel reservation. Only frames that pass the integrity check trigger channel reservation actions, creating a feedback mechanism that improves efficiency while maintaining controlled interference management through selective response
Data Source
AI summary
Systems and techniques for managing channel reservation in a full-duplex wireless network. A transmitting node sends a media access control frame to a receiving node, including an integrity check field in a header of the frame. Upon performing an integrity check and determining that the media access control frame is addressed to itself, the receiving node sends a transmission so as to reserve the channel. If the receiving node has no data to send, the transmission may be an acknowledgement field, and if the receiving node has data to send, the transmission may be a media access control frame including an integrity check field in a header of the frame.