Secondary Channel Contention Access During Primary-Channel Occupancy
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in utilizing secondary channels when the primary channel is busy, leading to waste of secondary channel frequency resources.
Innovation Solution
A method and apparatus for contention-based access to a secondary channel, allowing wireless devices to contend for access based on channel occupancy information from a primary channel, and transmit management frames to indicate or change secondary channel access modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wireless device waits for the primary channel to become idle before accessing the secondary channel, then channel access control is simplified, but secondary channel frequency resources are wasted
Solution Approach 1:
The patent segments the channel access decision into two independent parts: primary channel monitoring (for occupancy information) and secondary channel access (for frequency resources). This allows devices to independently access secondary channels based on their own needs rather than being constrained by primary channel status, thereby resolving the contradiction between simplified control and resource waste.
Solution Approach 2:
The patent introduces dynamic channel access modes where devices can flexibly choose to access secondary channels based on real-time conditions. The access mode can be changed dynamically through management frames, allowing the system to adapt between different access strategies (contention-based vs. scheduled) to optimize both control simplicity and resource utilization.
2Device complexity
If secondary channel access is restricted when primary channel is busy, then channel coordination is simplified, but transmission efficiency decreases
Solution Approach 1:
The patent separates primary channel coordination from secondary channel access decisions. Devices monitor primary channel occupancy information independently and make their own access decisions for secondary channels, eliminating the need for complex centralized coordination while improving transmission efficiency through parallel operations.
Solution Approach 2:
Each wireless device autonomously decides whether to access the secondary channel based on its own transmission needs and the primary channel occupancy information it has received. This self-service approach eliminates the need for complex coordination mechanisms while maximizing transmission efficiency through distributed decision-making.
3Loss of energy
If contention-based access mode is introduced for secondary channels, then resource utilization improves, but access control complexity increases
Solution Approach 1:
The patent uses feedback mechanisms where devices transmit management frames containing occupancy information about the primary channel. This feedback allows other devices to make informed access decisions for secondary channels, improving resource utilization while keeping the control mechanism relatively simple through information exchange rather than complex coordination.
Solution Approach 2:
The patent changes the access control parameter from binary (allow/deny based on primary channel status) to multi-mode (contention-based, scheduled, etc.). This parameter change allows flexible resource allocation while maintaining manageable complexity through standardized access modes that can be configured via management frames.
Data Source
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AI summary
The present application relates to the field of communications, and discloses a contention access method and apparatus for a secondary channel, a device, and a medium. The method comprises: after receiving channel occupation information exchanged by a second wireless device on a primary channel, contending for accessing the secondary channel in an idle state on the basis of a secondary channel access mode, wherein the primary channel and the secondary channel are a set of mutually bonded channels. Under the condition that the channel occupation information is exchanged on the primary channel, a first wireless device can still contend for accessing the secondary channel in the idle state, thus avoiding the waste of resources of the secondary channel, additionally, how to perform channel contention access is specified in said secondary channel access mode.