P2P Discovery Using Dedicated Search and Listen Modes
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Solution Overview
Problem
Current wireless communication systems, particularly in Wi-Fi Direct and P2P environments, face limitations in device discovery efficiency due to unnecessary procedures and lack of standardized software support, leading to slow transmission speeds and limited compatibility between devices.
Innovation Solution
A method for P2P user equipment in a wireless communication system that transmits a first frame for discovery to an advertiser user equipment, receives a second frame in response, and identifies matched P2P devices by operating in search mode only, reducing unnecessary procedures and enhancing discovery efficiency by using specific channels like Channel 6 or alternating modes if initial channels fail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional discovery modes (listen mode, scan mode, search mode) are used in Wi-Fi Direct P2P environments, then device compatibility is maintained, but discovery efficiency is reduced due to unnecessary procedures and time consumption
Solution Approach 1:
The patent extracts and removes unnecessary discovery modes (listen mode, scan mode) from the traditional Wi-Fi Direct P2P discovery process. By eliminating these redundant procedures and retaining only the essential search mode, the system achieves faster device discovery while maintaining compatibility, directly resolving the contradiction between discovery efficiency and discovery time
Solution Approach 2:
The patent segments the discovery process by assigning specific roles (advertiser and seeker) to devices. Advertiser devices continuously transmit frames in a simplified manner while seeker devices initiate discovery by sending search frames. This segmentation eliminates the need for complex mode switching and allows parallel operation, improving discovery efficiency without increasing discovery time
2Adaptability or versatility
If multiple operation modes (listen mode, scan mode, search mode) are implemented for device discovery, then compatibility with legacy devices is maintained, but device complexity increases
Solution Approach 1:
The patent inverts the traditional discovery approach by having advertiser devices continuously transmit discovery frames without needing to listen or scan. This reversal eliminates the complexity of mode switching while maintaining compatibility, as legacy devices can still function as seekers initiating discovery, thus resolving the contradiction between compatibility and complexity
3Speed
If traditional P2P discovery procedures are used, then legacy device compatibility is maintained, but transmission speed is slow
Solution Approach 1:
The patent implements preliminary action by having advertiser devices continuously transmit discovery frames before any actual data transfer is needed. This pre-positioning of discovery information allows seeker devices to immediately initiate connection upon receiving frames, eliminating the need for complex handshake procedures and significantly improving transmission speed while maintaining procedural simplicity
Data Source
AI summary
The present specification may provide a method for performing discovery by a seeker terminal in a wireless communication system. In this instance, the method by which a seeker terminal performs discovery may comprise the steps of: transmitting a first frame associated with discovery, by the seeker terminal, to an advertiser terminal; receiving, from the advertiser terminal, a second frame in response to the first frame; and discovering a matching P2P terminal on the basis of the received second frame. The seeker terminal may transmit the first fame by operating in only a search mode, without a listen mode and a scan mode; the advertiser terminal may transmit the second frame by operating in only a listen mode: and the seeker terminal and the advertiser terminal may perform discovery in only a first channel.