Access Point Channel Synchronization Switching
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently switching between primary and auxiliary channels for synchronization, particularly in scenarios where multiple stations (STAs) need to communicate with an access point (AP) over multiple channels.
Innovation Solution
The proposed solution involves an access point (AP) indicating support for synchronization and duration on a channel, allowing stations (STAs) to switch from a primary channel to an auxiliary channel based on detected transmissions. The AP sends a synchronization frame to inform STAs of the auxiliary channel's availability, enabling communication during the synchronization duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stations switch to auxiliary channel for synchronization, then synchronization efficiency is improved, but channel switching complexity increases
Solution Approach 1:
The access point announces auxiliary channel availability and synchronization duration in advance through broadcast frames before stations need to switch channels. This preliminary information provision allows stations to prepare for channel switching without sudden complexity, resolving the contradiction by enabling efficient synchronization through pre-announced auxiliary channel usage.
2Productivity
If communication switches from primary to auxiliary channel, then channel utilization is improved, but transmission reliability may worsen
Solution Approach 1:
The access point acts as an intermediary that manages the transition from primary to auxiliary channels. It broadcasts synchronization information and coordinates the switching process, ensuring that stations reliably switch to auxiliary channels for data transmission while maintaining network coordination. This intermediary management resolves the contradiction by enabling improved channel utilization through controlled switching while maintaining transmission reliability via centralized coordination.
3Measurement precision
If stations monitor for synchronization frames, then synchronization accuracy is improved, but detection complexity increases
Solution Approach 1:
The patent uses distinct frame types and channel designations (auxiliary vs. primary) as visual identifiers to help stations quickly identify synchronization-relevant transmissions. By making synchronization frames distinctly recognizable through their structure and announcement mechanisms, stations can accurately detect synchronization opportunities without complex detection algorithms, resolving the contradiction between synchronization accuracy and detection complexity.
Data Source
AI summary
An access point may communicate stations over a plurality of channels. The access point may indicate support of, and/or duration for, synchronization via at least one of the channels. Based on the indicated support and a transmission detected on a primary channel, operation may be switched from the primary channel to an auxiliary channel. Communication between the access point and a station may be conducted via the auxiliary channel during the duration after a synchronization frame is sent to inform the station for an availability of the auxiliary channel.