Splitting Communication Channels for Mixed Wireless Standards
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Solution Overview
Problem
The coexistence of wireless client devices with and without compliance to the latest IEEE 802.11ax standard leads to inefficiencies, such as delayed scheduling, due to the inability of older devices to comply with new specifications, resulting in gaps in wireless coverage when traditional coverage-based approaches are used.
Innovation Solution
A network device splits communication channels on a band, like the 5 GHz UNII band, into two groups: one operating according to the IEEE 802.11ax standard and another according to older specifications, allowing for improved coexistence by employing orthogonal frequency-division multiple access (OFDMA) and spatial reuse in the first group, and omitting these features in the second group to accommodate devices without IEEE 802.11ax compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single communication channel operates according to the latest IEEE 802.11ax standard, then wireless efficiency and throughput are improved, but non-compliant devices cannot connect, resulting in coverage gaps
Solution Approach 1:
The communication channel is segmented into two distinct groups: a first group operating according to IEEE 802.11ax standard with OFDMA and spatial reuse enabled, and a second group operating with legacy standards where these features are disabled. This segmentation allows simultaneous support for both compliant and non-compliant devices without interference.
Solution Approach 2:
Different quality settings are applied to different parts of the communication system. The first communication channel group uses advanced features (OFDMA, spatial reuse) for high-performance compliant devices, while the second group uses simplified settings for legacy devices, optimizing performance for each device type locally.
2Productivity
If OFDMA and spatial reuse features are enabled across all channels, then network throughput increases, but scheduling delays occur for non-compliant devices
Solution Approach 1:
Communication channels are divided into two groups based on feature support. The first group enables OFDMA and spatial reuse for high throughput, while the second group operates without these features to avoid scheduling delays for non-compliant devices, ensuring timely service for all device types.
3Area of stationary object
If traditional coverage-based approaches are used, then service area is maximized, but inefficiencies arise due to mixed device compliance
Solution Approach 1:
The service area is maintained while segmentation is applied to communication channels rather than geographic zones. Each channel group targets specific device types, allowing full coverage area utilization without the inefficiencies of mixed-compliance scheduling that plague traditional approaches.
Solution Approach 2:
Different operational qualities are applied to different channel groups serving different device types within the same service area. This allows maximized coverage while maintaining high efficiency for compliant devices and reliable basic service for non-compliant devices simultaneously.
Data Source
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AI summary
In some examples, a non-transitory machine-readable medium can include instructions executable by a processing resource of a network device to: receive a first message on a communication band from a first wireless client device; determine a capability complying with a particular wireless specification of the first wireless client device based on information in the first message; split communication channels on the communication band into a first communication channel group and a second communication channel group; and operate the first communication channel group in accordance with the particular wireless specification and the second communication channel group in accordance with other wireless specifications.