Device Discovery Using Broadcast Code Matching
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Solution Overview
Problem
Existing methods for short distance device discovery, such as using cell ID information, lack accuracy, leading to unreliable user location detection and reduced user experience in establishing short distance communication.
Innovation Solution
A method involving a first device acquiring user identification and broadcast information of a target device through an application server and short distance server, using device-to-device (D2D) functionality to match broadcast information and determine proximity within a preset distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cell ID information or GPS location information is used for short distance discovery, then the discovery range can be covered, but the accuracy of discovering a user in short distance cannot be guaranteed
Solution Approach 1:
The patent introduces a dedicated short distance server as an intermediary between devices and the network. This server receives device identities from devices, generates corresponding broadcast information, and manages the mapping between device identities and broadcast codes. The intermediary server enables accurate short distance discovery by coordinating the complex interactions between devices, application servers, and the discovery mechanism, thereby improving both accuracy and reliability simultaneously
Solution Approach 2:
The patent changes the discovery parameter from location-based (cell ID or GPS coordinates) to device identity-based (device ID mapped to broadcast code). This parameter transformation enables direct device-to-device matching through broadcast information comparison, significantly improving measurement precision for short distance discovery while maintaining reliable user location detection through the structured identity-broadcast code mapping managed by the short distance server
2Ease of operation
If a device broadcasts its own broadcast information, then other devices can discover it, but the device needs to acquire other devices' broadcast information to initiate discovery
Solution Approach 1:
The patent implements preliminary action by having devices automatically acquire their own device identities and corresponding broadcast information from the short distance server in advance, before the actual discovery process begins. The device stores this broadcast information locally, enabling immediate discovery operations without requiring real-time server queries during the discovery moment, thus improving ease of operation while the server manages the complexity of identity-broadcast code mapping
Solution Approach 2:
The short distance server acts as an intermediary that manages the complex mapping between device identities and broadcast codes. When a device needs to discover another device, it queries the server with the target device's identity, and the server returns the corresponding broadcast code. This intermediary mechanism simplifies the discovery process for devices while the server handles the complexity of maintaining and querying the identity-broadcast code mappings
Data Source
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AI summary
The present invention discloses a method, an apparatus and a system for device discovery, which belong to the field of communication technologies. The method includes: acquiring, by a first device, a user identification of a target user, and acquiring, according to the user identification of the target user, broadcast information of a second device which the target user logs in; when broadcast information of another device is monitored through a device-to-device (D2D) function, matching, by the first device, the monitored broadcast information with the broadcast information of the second device, and if the match is successful, determining, by the first device, that the second device and the first device are within a preset distance. In the present invention, since the first device is capable of monitoring the broadcast information of other devices within a preset distance, the first device matches the acquired broadcast information of the second device with the monitored broadcast information to determine whether the target user is monitored by the first device, therefore, the accuracy of discovering a short distance user is improved and, thus, the problem in the prior art that the accuracy of discovering a user in a short distance cannot be guaranteed by using a cell identity (ID) is solved.