P2P Discovery Control System with Dynamic Channel Switching
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Solution Overview
Problem
In peer-to-peer (P2P) networks, devices often fail to discover each other when operating on different channels or with synchronized listen and search modes, leading to delayed or incomplete discovery, as they do not detect and respond to probe request signals effectively.
Innovation Solution
A discovery control system that includes a mode selection module allowing devices to operate in both listen and search modes simultaneously, generating and receiving probe request and response signals, and switching channels to ensure 100% discoverability by selecting appropriate operating modes and channels dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If devices operate in traditional listen or search mode on fixed channels, then device complexity is reduced, but discoverability between peer devices deteriorates when operating on different channels
Solution Approach 1:
The patent implements dynamic channel switching where peer devices can switch between different channels during the discovery process. Devices transition from listening on their home channel to searching on other channels, and vice versa, enabling discoverability across channel boundaries while maintaining manageable complexity through structured state transitions.
Solution Approach 2:
The discovery process is segmented into distinct phases (listen mode and search mode) that can be executed independently on different channels. This segmentation allows devices to divide the discovery task across multiple channels rather than requiring simultaneous monitoring of all channels, reducing overall system complexity.
2Productivity
If devices use synchronized listen and search modes, then coordination between devices is simplified, but discovery effectiveness deteriorates due to missed probe requests and responses
Solution Approach 1:
The patent employs periodic alternation between listen mode and search mode with defined durations. Devices switch between these modes in a periodic fashion, ensuring that at least one device in each pair is in the appropriate mode to send or receive probe requests. This periodic structure maintains ease of operation through predictable timing while significantly improving discovery effectiveness.
3Reliability
If devices operate in ad hoc mode with direct communication, then network setup is simplified, but discovery reliability deteriorates when devices are on different channels
Solution Approach 1:
The patent uses probe request and probe response frames as intermediary signals to facilitate reliable discovery between devices on different channels. These standardized frames act as mediators that carry discovery information across channel boundaries, ensuring reliable peer detection without requiring complex custom communication protocols.
Data Source
AI summary
A discovery control system of a first device includes a mode selection module. The module selection module is configured to select a listen mode and a search mode. A discovery control module includes a probe request module. The probe request module is configured to generate a probe request signal within the first device and receive a probe response signal generated by a second device during the search mode. A probe response module is configured to generate a probe response signal within the first device during the listen mode and the search mode and based on a probe request signal generated by the second device.