Wi-Fi Message Sending Method for Interference Stability
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Solution Overview
Problem
In Wi-Fi communications, long-range transmission by narrowband devices and broadband transmission by broadband devices face stability issues due to interference from legacy devices using the same frequency band, leading to unstable message transmission.
Innovation Solution
A message sending method that involves exchanging time-frequency resource information between devices on different bandwidths to set a current medium busy time value, preventing interference and maintaining transmission stability by ensuring devices do not preempt the medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If narrowband devices perform long-range transmission on a mainstream frequency band, then communication range is extended, but transmission stability deteriorates due to interference from legacy devices
Solution Approach 1:
The patent segments the frequency band into narrowband channels for long-range transmission, allowing narrowband devices to operate on specific frequency portions while legacy devices use the full band. This segmentation reduces interference by separating the operational frequencies of different device types.
Solution Approach 2:
The patent introduces an intermediary mechanism where devices send reservation messages carrying time-frequency resource information before actual data transmission. This intermediary reservation system coordinates resource usage between narrowband and legacy devices, preventing simultaneous transmissions that would cause interference and maintaining transmission stability.
2Productivity
If broadband devices perform transmission on the same frequency band, then data transmission capacity is improved, but interference to narrowband devices increases
Solution Approach 1:
The patent segments the frequency band into narrowband channels, allowing broadband devices to transmit on the full band while narrowband devices operate on specific frequency portions. This segmentation enables broadband transmission capacity while protecting narrowband transmissions from interference through frequency separation.
3Adaptability or versatility
If legacy devices continue to use the mainstream frequency band, then compatibility is maintained, but interference to both narrowband and broadband devices occurs
Solution Approach 1:
The patent implements a universal reservation message mechanism that works across all device types (narrowband, broadband, and legacy). The reservation messages carry time-frequency resource information that all devices can process, creating a common coordination layer that maintains legacy compatibility while enabling stable transmissions for all device types.
Data Source
AI summary
A method implemented by a first device includes: sending a first message to a second device on a first bandwidth; receiving on the first bandwidth, a second message sent by the second device in response to the first message; sending a third message on a second bandwidth, where the first message, the second message, and the third message all carry device-reserved time-frequency resource information; and within the device-reserved time-frequency resource information, sending, a message to the second device on the first bandwidth; or receiving on the first bandwidth, a message sent by the second device, where if the first bandwidth is less than 20 M, the second bandwidth is greater than or equal to 20 M; or if the first bandwidth is greater than or equal to 20 M, the second bandwidth is less than 20 M. Embodiments of the present disclosure further provide a related device and a system.