Communications Device Frame Structure for 320 MHz Bandwidth Indication
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Solution Overview
Problem
Current wireless communications systems, such as those adhering to the IEEE 802.11 standards, lack the ability to effectively indicate a Basic Service Set (BSS) bandwidth exceeding 160 MHz, which is necessary for next-generation Wi-Fi standards like Extremely High Throughput (EHT) that support up to 320 MHz bandwidth.
Innovation Solution
The proposed solution involves generating a specific frame structure that includes a channel bandwidth field and four channel center frequency segment fields. This frame is used to indicate the BSS bandwidth and the location of the operating channel, enabling bandwidth indications beyond the 160 MHz limit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the bandwidth indication method is designed for 160 MHz or lower, then the device complexity is reduced and ease of operation is improved, but the adaptability to next-generation Wi-Fi standards with 320 MHz bandwidth is insufficient
Solution Approach 1:
The patent segments the channel center frequency indication into four separate 6-bit fields (first through fourth channel center frequency segment fields), each representing a different portion of the frequency spectrum. This segmentation allows the system to indicate bandwidths up to 320 MHz by combining information from multiple segments, resolving the contradiction between maintaining manageable device complexity and achieving enhanced adaptability to wider bandwidths.
2Measurement precision
If the channel bandwidth field uses 6 bits, then the ease of manufacture and device complexity are minimized, but the measurement precision and range of bandwidth indication are limited to 160 MHz or lower
Solution Approach 1:
The patent transitions from a single 6-bit channel center frequency field to four separate 6-bit segment fields, effectively adding dimensional capacity to the indication system. Each segment field provides 6 bits of precision, and together they span a broader frequency range, enabling precise indication of bandwidths up to 320 MHz while keeping each individual field simple and easy to manufacture.
Data Source
AI summary
A bandwidth information indication method includes generating, by a first communications device, a first frame, where the first frame includes a channel bandwidth field, a first channel center frequency segment field, a second channel center frequency segment field, a third channel center frequency segment field, and a fourth channel center frequency segment field, where the channel bandwidth field indicates a basic service set (BSS) bandwidth, and the first channel center frequency segment field, the second channel center frequency segment field, the third channel center frequency segment field, and the fourth channel center frequency segment field indicate a location of an operating channel of a BSS, and sending, by the first communications device, the first frame.