Wireless Terminal Control Frame Information Embedding
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Solution Overview
Problem
Current Wi-Fi Direct P2P communication methods are inefficient for urgent message transfer and limited in information sharing beyond local groups, requiring lengthy group formation processes and packet handshakes, which hinder the spread of messages like SOS signals.
Innovation Solution
Embedding arbitrary information in control frames, such as Probe Requests or Beacons, allows terminals to share notification information without forming a group, enabling quick information sharing and determining duplicate messages without group formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals perform Device Discovery processing by alternating Search state and Listen state while sequentially changing channels, then terminals can discover each other, but a considerably long time is required
Solution Approach 1:
The patent embeds notification information about terminal contents and group membership in control frames (Probe Request, Probe Response, Beacon) that are transmitted during the existing Device Discovery process. This preliminary embedding of information allows terminals to assess compatibility and urgency before completing full group formation, enabling urgent messages to be prioritized or pre-notified without waiting for complete group establishment.
2Reliability
If terminals perform complete handshake including GO Negotiation processing and WPS Provision Phase-1 and Phase-2, then a group can be formed, but the process takes considerably long time
Solution Approach 1:
The patent extracts and embeds essential notification information (terminal identifiers, content information, group membership status) directly into the control frames that are already being exchanged during Device Discovery. This extraction of critical information from the full handshake sequence allows terminals to obtain necessary notification data without completing the entire GO Negotiation and WPS Provision process, significantly reducing time for urgent communications.
3Reliability
If a list of contents of another P2P terminal is known only after a group has been formed, then security is maintained, but efficiency is reduced when the other terminal already has the same message
Solution Approach 1:
The patent implements partial information disclosure by embedding notification information in control frames that reveals sufficient data (content identifiers, terminal identifiers) for terminals to assess whether they already possess the same message. This partial action allows efficiency optimization through duplicate detection without fully disclosing all terminal contents before group formation, maintaining security while avoiding redundant group formation for duplicate messages.
4Reliability
If each group is independently formed and operates, then group security is maintained, but data sharing is limited within each group and cannot be notified beyond local group
Solution Approach 1:
The patent makes control frames serve multiple functions: they not only perform their traditional Device Discovery role but also carry notification information about terminal contents and group membership. This multi-functionality allows information to propagate across group boundaries through the existing control frame exchange mechanism, enabling cross-group notification while maintaining the security and independence of individual group operations.
Data Source
AI summary
A communication method, a communication system, a wireless terminal, and a wireless control method are provided that make it possible to share information between terminals without forming a group. In a communication method in a wireless communication network including a plurality of terminals (N1 to N3), a first terminal (N1) and a second terminal(N2 or N3) that belong to different groups, or do not belong to a group, can embed arbitrary information in a control frame (101) that is sent and received to search for a terminal or another group in vicinity, and notification information (MSG) of one of the terminals is notified to the other terminal by using the control frame.