Dynamic Multichannel Access for WLAN Resource Utilization
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Solution Overview
Problem
Existing WLAN systems face low channel usage efficiency and resource wastage due to the inability to utilize non-reserved idle channels during data transmission.
Innovation Solution
A multichannel access method that involves obtaining a transmission opportunity for a reserved channel, sensing a non-reserved channel in a preset time segment, and using it as a second reserved channel if idle, thereby allowing data transmission on both channels simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a station reserves a channel in advance for data transmission, then the channel availability is guaranteed, but the channel usage efficiency is low and channel resources are wasted
Solution Approach 1:
The patent implements dynamic channel reservation by allowing stations to sense and select additional idle channels during the TXOP period. The reservation is not fixed but adapts to real-time channel conditions, enabling the system to transition from static single-channel reservation to dynamic multi-channel utilization, thereby improving channel usage efficiency while maintaining transmission reliability
Solution Approach 2:
The patent changes the parameter of channel bandwidth by allowing stations to sense and utilize wider available spectrum by selecting multiple idle channels (e.g., 20MHz, 40MHz, 80MHz) during TXOP. This parameter change enables the system to adapt to varying channel conditions and maximize resource utilization without compromising the guaranteed channel availability
2Reliability
If a station uses only the reserved channel for data transmission, then the transmission reliability is ensured, but the channel resources are wasted when other channels are idle
Solution Approach 1:
The patent enables the transmission system to perform multiple functions: it maintains the primary reserved channel for reliable transmission while simultaneously utilizing additional idle channels when available. This multi-functionality allows the system to adapt between single-channel and multi-channel operation modes, reducing resource waste while ensuring transmission reliability through the primary reserved channel
3Ease of operation
If the bandwidth of the reserved channel is fixed, then the channel reservation is simple, but the channel utilization is low
Solution Approach 1:
The patent performs preliminary channel sensing and selection during the TXOP period before actual data transmission begins. By proactively identifying and reserving additional idle channels in advance, the system prepares for optimized multi-channel transmission without adding complexity to the initial channel reservation process, thereby maintaining ease of operation while improving channel utilization
Data Source
AI summary
Embodiments of the present application disclose a multichannel access method, including: obtaining a transmission opportunity TXOP of a first reserved channel; sensing a non-reserved channel other than the first reserved channel in a preset time segment in the TXOP, and if the non-reserved channel is in an idle state, using the non-reserved channel as a second reserved channel; and when an ending moment of the preset time segment is reached, sending a current data frame on the first reserved channel and the second reserved channel. Correspondingly, the embodiments of the present application further disclose a multichannel access apparatus. Channel utilization can be improved by implementing the embodiments of the present application.