WFDS Service Discovery via Application Service Platform

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Solution Overview

Problem

Current Wi-Fi Direct Service (WFDS) systems lack an efficient method for searching and advertising services, which hinders effective service discovery and management within the network.

Innovation Solution

A method and device for controlling and managing the Application Service Platform (ASP) in WFDS systems, enabling service search and advertisement through specific frames and protocols, allowing for service discovery and session setup between peer devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional WLAN systems with radio access points are used, then centralized network management is achieved, but device connection complexity and setup time increase

Engineering Contradiction:
Improvedevice connection simplicityVSAvoidconnection setup time
Core Design Contradiction:
Ease of operationVSLoss of time

Solution Approach 1:

The patent extracts the radio access point (AP) from the network architecture, enabling devices to communicate directly with each other without requiring centralized AP management. This peer-to-peer approach eliminates the intermediate infrastructure component, simplifying connection procedures and reducing setup time while maintaining network functionality.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

Devices perform self-configuration and direct communication setup without requiring external AP coordination. Each device independently manages its own connections and service advertisements, enabling autonomous peer-to-peer networking that reduces both complexity and setup time compared to AP-dependent systems.

Inventive Principle:
Principle #25Self-service

2Adaptability or versatility

If service discovery protocols are implemented in WFDS systems, then service advertisement capability is improved, but system complexity and overhead increase

Engineering Contradiction:
Improveservice discovery capabilityVSAvoidservice management complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a universal service advertisement mechanism where devices use standardized frame structures and protocols that can advertise multiple service types simultaneously. This multi-functional approach enables diverse services (file transfer, printing, display, etc.) to be discovered using a single unified protocol framework, increasing adaptability without proportionally increasing complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The service discovery mechanism uses configurable parameters within standardized frames to adapt to different service types and requirements. By changing parameters such as service identifiers, capability flags, and advertisement intervals rather than implementing separate protocols for each service, the system achieves versatility while maintaining manageable complexity through parameter-based flexibility.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentEP2869642B1Method for searching for or advertising service in direct communication system and device for same
Publication Date: 2018.03.07 LG ELECTRONICS INC
  • EP2869642B1 patent drawingFigure 1
  • EP2869642B1 patent drawingFigure 2~3
  • EP2869642B1 patent drawingFigure 4

AI summary

The present invention relates to a wireless communication system, and a method for searching for or advertising a service and a device for the same. A method for searching for a service, according to one embodiment of the present invention, can comprise: transmitting a probe request frame to search for a device supporting a predetermined service desired by a first wireless device; receiving a probe response frame from a second wireless device supporting the predetermined service; transmitting, by the first wireless device, a service search request frame including a service name of the predetermined service to the second wireless device; and receiving a service search response frame from the second wireless device, wherein the service search response frame can include service status information indicating whether the predetermined service is available on the second wireless device.