Securing D2D Discovery Information via Timing-Based Authentication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In device-to-device communication systems, discovery information is vulnerable to rogue UE interference, leading to incorrect information transmission and reception, as existing replay protection mechanisms are inefficient due to high overhead and synchronization challenges, particularly with small discovery resource capabilities.
Innovation Solution
A method involving synchronization with a discovery resource cycle number, creation of security information using a security key and discovery channel logical timing information, and transmission of secured discovery information on the discovery physical channel, including message authentication codes (MAC) or digital signatures (DS), to prevent rogue UE interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If replay protection mechanism uses counter or packet number, then replay protection capability is improved, but synchronization difficulty increases and overhead increases
Solution Approach 1:
The discovery PDU structure includes fields (source UE ID, destination UE ID, discovery type, etc.) that automatically enable replay protection without requiring external counter management or complex synchronization mechanisms. The receiving UE can independently verify the authenticity of discovery information using these self-contained fields.
Solution Approach 2:
The patent extracts the essential replay protection functionality from complex counter-based mechanisms by using only the necessary identification fields already present in the discovery PDU structure, eliminating the need for separate counter management and synchronization overhead.
2Area of stationary object
If discovery information is transmitted through broadcast channel, then discovery capability coverage is improved, but security against rogue UE interference worsens
Solution Approach 1:
The discovery PDU includes source UE ID and destination UE ID fields that provide feedback mechanisms for verifying the authenticity of discovery information. Receiving UEs can use these fields to validate whether the discovered information originates from legitimate UEs, preventing rogue UE interference while maintaining broadcast coverage.
3Reliability
If discovery resource is allocated to specific UE, then transmission reliability is improved, but receiving UE cannot identify specific discovery resource used by transmitter
Solution Approach 1:
The patent merges the discovery resource allocation information with the discovery PDU content by including source UE ID, destination UE ID, and discovery type fields within the PDU structure itself. This allows receiving UEs to identify the specific discovery resource and transmitter without requiring separate resource indication mechanisms.
Data Source
AI summary
The present invention relates to a method and a system for securing discovery information being transmitted through a direct radio signal in a wireless communication system which supports a device-to-device service, and a device-to-device communication method of a transmission terminal, according to one embodiment of the present invention, can comprise: synchronizing with a discovery resource cycle number; determining discovery channel logical timing information of a discovery physical channel through which discovery information is to be transmitted; generating security information by using a security key, the determined discovery channel logical timing information and the discovery information to be transmitted; and transmitting the discovery information including the security information through the discovery physical channel According to one embodiment of the present invention, it is possible to prevent discovery information of a terminal to be wrongly transmitted due to a case where another rogue terminal receives and changes the discovery information of the terminal, or the like.