Dynamic Channel Bonding via Quiet Period Sensing
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Solution Overview
Problem
Current wireless communication systems face challenges in dynamically adjusting transmission bandwidth during ongoing PPDU transmissions due to interference, leading to inefficient use of secondary channels and spectrum resources, particularly in the 6 GHz band where incumbent services cause notching, limiting the availability for Wi-Fi operations.
Innovation Solution
Implementing a dynamic channel bonding and multi-band aggregation system that introduces quiet periods during PPDU transmissions to sense secondary channels, allowing asynchronous channel bonding and aggregation without the need for specialized antennas or complex self-interference cancellation algorithms, enabling the detection of idle secondary channels for increased bandwidth utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If channel bonding is performed statically before PPDU transmission, then transmission bandwidth is determined, but the system cannot adapt to changing channel conditions and waste spectrum resources
Solution Approach 1:
The patent implements dynamic channel bonding by allowing the transmitter to sense secondary channels during quiet periods and adjust the transmission bandwidth mid-PPDU based on current channel conditions. This transforms the static channel allocation into a dynamic system that can adapt to changing spectrum availability without requiring complete retransmission.
Solution Approach 2:
The patent introduces periodic quiet periods during PPDU transmission at A-MPDU subframe boundaries, where the transmitter stops transmitting temporarily to sense secondary channels. This periodic sensing mechanism enables dynamic bandwidth adjustment while maintaining overall transmission continuity.
2Measurement precision
If the transmitter senses secondary channels continuously, then channel availability is detected, but transmission efficiency is reduced due to interruption
Solution Approach 1:
The patent schedules channel sensing to occur periodically at quiet periods which naturally occur at A-MPDU subframe boundaries. This timing ensures that sensing does not interrupt the continuous flow of data transmission within each subframe, maintaining high transmission efficiency while achieving accurate channel availability detection.
Solution Approach 2:
The patent maintains continuous transmission within each A-MPDU subframe by prohibiting sensing during the active transmission period. The useful transmission action continues uninterrupted, and channel sensing is performed only during the brief quiet periods between subframes, thus preserving transmission efficiency.
3Productivity
If self-interference cancellation algorithms are used to enable dynamic bonding, then bandwidth utilization improves, but device complexity and computational requirements increase
Solution Approach 1:
The patent extracts the channel sensing function from the continuous transmission process and places it in dedicated quiet periods. This separation eliminates the need for complex self-interference cancellation algorithms during transmission, as sensing occurs when no transmission is taking place, significantly reducing computational complexity while maintaining bandwidth utilization benefits.
4Difficulty of detecting and measuring
If specialized antennas are used for asynchronous channel bonding, then channel detection capability improves, but device complexity and cost increase
Solution Approach 1:
The patent enables the existing transmitter to perform channel sensing using its own transmission infrastructure during quiet periods. The transmitter leverages its existing antennas and signal generation capabilities to detect secondary channel availability, eliminating the need for specialized sensing antennas or additional hardware components.
Data Source
AI summary
This disclosure describes systems, methods, and devices related to dynamic channel bonding and multi-band aggregation. A device may determine a plurality of aggregated medium access control (MAC) protocol data unit (A-MPDU) subframes to send to a station device including a first A-MPDU subframe and a second A-MPDU subframe. The device may determine a quiet period between the first A-MPDU subframe and the second A-MPDU subframe. The device may cause to send the plurality of A-MPDU subframes to the station device on a first channel. The device may determine a status of a second channel during the quiet period. The device may cause to send the second A-MPDU subframe to the station device using a multi-band transmission on the first channel and the second channel.