Wide-Bandwidth mmWave Data Frame Coexistence
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Solution Overview
Problem
Legacy wireless devices are unable to decode wide-bandwidth data frames transmitted over mmWave channels, leading to interference and coexistence issues with next-generation devices operating on these channels, as they do not support the new protocol for communication over wide-bandwidth mmWave channels.
Innovation Solution
The method involves transmitting reservation frames over multiple mmWave channels to reserve bandwidth, using a combination of Request To Send (RTS) and Clear To Send (CTS) frames with specific duration and wide-bandwidth indications, allowing both legacy and next-generation devices to coexist by including a legacy portion in the data frame that can be decoded by all devices, and using channel estimation fields to facilitate channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wide-bandwidth data frames are transmitted over mmWave channels using next-generation protocol, then higher bit rate is achieved, but legacy wireless devices cannot decode the frames causing interference and coexistence issues
Solution Approach 1:
The data frame is segmented into multiple portions: a legacy portion that legacy devices can decode and a new portion that provides enhanced functionality for next-generation devices. This segmentation allows the same transmission to serve both legacy and advanced devices simultaneously, resolving the contradiction between achieving high bit rates and maintaining compatibility.
Solution Approach 2:
The transmitted frame serves multiple functions: it acts as a valid data frame for next-generation devices while simultaneously serving as a reservation frame for legacy devices. This multi-functionality enables universal compatibility across different device generations without sacrificing the benefits of wide-bandwidth transmission.
2Reliability
If reservation frames are transmitted over multiple mmWave channels, then bandwidth reservation is achieved, but legacy devices interfere with next-generation device communication
Solution Approach 1:
A specially designed frame structure acts as an intermediary that bridges legacy and next-generation protocols. The frame contains elements recognizable by legacy devices (enabling them to reserve bandwidth) while also containing structured data that next-generation devices can interpret for coordinated communication, thereby eliminating interference through unified protocol understanding.
3Adaptability or versatility
If dual headers are included in data frame, then both legacy and next-generation devices can decode frames, but device complexity increases
Solution Approach 1:
Different portions of the frame have different qualities and structures optimized for different device types. The legacy portion uses simple structures that legacy devices can process, while the new portion contains enhanced structures for next-generation devices. This local differentiation reduces overall complexity compared to making the entire frame complex for all devices.
Data Source
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AI summary
Method and apparatus for a first wireless communication station, for performing the steps of; - transmitting a Request to Send (RTS) frame to a second station to establish a Transmission Opportunity (TxOP), the RTS frame duplicated over a plurality of channels in a frequency band above 45 GHz, a header field of the RT S frame comprising a bandwidth indication of a channel bandwidth comprising the plurality of channels; - receiving a Clear to Send (CTS) frame from the second station over at least one channel of the plurality of channels; and - transmitting a data transmission to the second station during the TxOP.