Wide Channel WLAN Setup Primary Secondary Channel Design
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Solution Overview
Problem
In wireless communications, especially in wide channel WLANs, existing technologies face challenges in efficiently managing channel resources to achieve high data throughput while avoiding interference between overlapping networks, particularly in determining appropriate primary and secondary channels for new networks without disrupting existing ones.
Innovation Solution
The method involves determining overlap between existing and new network channels, designating primary channels, and avoiding secondary channel usage to prevent interference, utilizing circuits and access points to manage channel designation and intolerance indications to adjust network operations accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a new network uses wide channels to achieve high data throughput, then productivity is improved, but interference with existing networks increases
Solution Approach 1:
The patent applies local quality by differentiating between primary and secondary channels within the wide channel structure. Primary channels are selected to avoid overlap with existing networks, while secondary channels can utilize available spectrum including overlapping portions. This localized differentiation allows the system to maximize throughput on secondary channels while protecting existing networks on primary channels, resolving the contradiction between high productivity and interference reduction.
2Adaptability or versatility
If channel resources are shared among multiple networks, then adaptability is improved, but reliability deteriorates due to potential interference
Solution Approach 1:
The patent segments the wide channel into multiple sub-channels, designating one as primary and others as secondary. This segmentation allows different networks to share channel resources adaptively while maintaining reliability through the primary channel's protected status. The primary channel serves as a reliable control plane, while secondary channels provide adaptable data plane resources that can be dynamically allocated without compromising overall system reliability.
3Reliability
If primary channels are designated for existing networks, then reliability is improved, but device complexity increases for new network setup
Solution Approach 1:
The patent applies preliminary action by having existing networks declare their primary channels in advance through beacon frames and intolerance indications. When a new network is set up, it performs a preliminary scan to identify declared primary channels and automatically avoids them. This preliminary declaration and avoidance mechanism simplifies the new network's setup process while ensuring existing networks maintain their reliability, as the complexity is shifted to a one-time declaration rather than continuous management.
Data Source
AI summary
Methods and apparatus for network setup in wide channel WLANs are provided. Techniques for co-existence of 20 MHz and 40 MHz networks (e.g., as defined by IEEE 802.11n) may be extended to 80 MHz and 160 MHz networks. For example, a primary channel of an existing network may be designated as the primary channel of a new network. Further, a primary channel of the existing network may not be used as a secondary channel in the new network. Intolerance operation between networks may include a first network releasing one or more channels in response to an intolerance indication received from a second network. Furthermore, in response to the intolerance indication from the second network, the first network may utilize one or more channels for communicating in the first network using a first set of access parameters. The access parameters may depend on the intolerance indication.