Secondary Channel Access Contention When the Primary Channel Is Busy
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Solution Overview
Problem
Wireless devices are unable to utilize secondary channels for transmission when the primary channel is busy, leading to waste of transmission opportunities and frequency domain resources.
Innovation Solution
A method for contention-based access to a secondary channel, where a wireless device contends for access based on channel occupancy information from a primary channel, using secondary channel access modes that include OBO and EDCA schemes to efficiently utilize secondary channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a wireless device waits for the primary channel to be idle before accessing the secondary channel, then channel access coordination is maintained, but transmission opportunities are lost and frequency domain resources are wasted
Solution Approach 1:
The patent segments the channel access process by allowing independent secondary channel access contention when the primary channel is busy. Instead of treating the bound channel group as a single unit requiring complete idle status, the method divides access rights so that devices can contend for secondary channels separately, thus resolving the contradiction between maintaining coordination and utilizing available resources.
Solution Approach 2:
The patent introduces dynamic channel access behavior where wireless devices can switch between waiting for the primary channel and actively contending for secondary channels based on real-time channel conditions. This dynamic adjustment allows the system to adapt to varying channel states, improving transmission efficiency while reducing resource waste by accessing available secondary channels rather than passively waiting.
2Loss of energy
If a wireless device actively contends for secondary channel access when the primary channel is busy, then resource utilization improves, but channel access coordination may be compromised
Solution Approach 1:
The patent applies preliminary action by having wireless devices perform channel sensing and contention preparation in advance. Before actively contending for secondary channels, devices monitor channel occupancy information and prepare contention parameters, ensuring that active contention occurs in a controlled manner that maintains coordination while improving resource utilization.
Solution Approach 2:
The patent implements feedback mechanisms where wireless devices monitor channel occupancy information from the primary channel and adjust their secondary channel contention behavior accordingly. This feedback loop ensures that active contention for secondary channels occurs in coordination with overall system state, maintaining reliability while enabling improved resource utilization when appropriate.
Data Source
AI summary
Provided is a method for contention-based access to a secondary channel. The method is applicable to a first wireless device, and includes: contending for access to the secondary channel in an idle state based on a secondary channel access mode upon receiving channel occupancy information interacted by a second wireless device on a primary channel, wherein the primary channel and the secondary channel are a group of bound channels.