Relay Discovery Messaging With Encrypted UE Identifiers
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Solution Overview
Problem
The implementation of 5G ProSe Model B relay discovery procedures lacks specific details on how to securely manage and transmit terminal identifiers during the discovery process, which is crucial for establishing communication connections between UEs through relay terminals.
Innovation Solution
The method involves generating and transmitting relay discovery messages with encrypted terminal identifiers using direct and relay discovery key sets, along with message integrity codes, and applying security schemes to ensure privacy and integrity protection based on the specific requirements of the communication scenario.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal identifiers are transmitted in plain text during relay discovery, then the discovery procedure is simple and fast, but terminal privacy and message integrity are compromised
Solution Approach 1:
The discovery message is segmented into two distinct datasets: direct discovery dataset (containing source and target UE identifiers) and relay discovery dataset (containing relay UE identifier). This segmentation allows different security treatments for different parts of the message, enabling privacy protection while maintaining structured processing.
Solution Approach 2:
Security schemes are applied preliminarily to the discovery messages before transmission. The source UE applies security schemes to protect its identifiers in the direct discovery dataset, and the relay UE applies security schemes to protect its identifier in the relay discovery dataset, ensuring privacy protection is built-in from the start of the discovery procedure.
2Reliability
If security schemes are applied to protect terminal identifiers, then privacy and integrity are ensured, but the processing overhead and message complexity increase
Solution Approach 1:
The patent introduces configurable security scheme parameters that can be adjusted based on the specific discovery scenario. Different security schemes with varying levels of protection and complexity can be selected, allowing the system to balance between security requirements and discovery speed by changing the security parameter settings.
Solution Approach 2:
Security schemes are applied selectively rather than uniformly to all identifiers. The source UE applies security schemes to protect sensitive information in the direct discovery dataset, while the relay UE applies security schemes to protect its identifier in the relay discovery dataset. This partial application of security measures provides adequate protection without the full overhead of protecting every single identifier with maximum security.
3Adaptability or versatility
If different security schemes are supported for different scenarios, then adaptability to various application needs is improved, but the system complexity and configuration overhead increase
Solution Approach 1:
The patent designs a universal security scheme framework that can handle multiple security requirements through a common structure. The same message format and processing procedures are used regardless of which specific security scheme is applied, allowing the system to support different security scenarios (UE-to-Network, UE-to-UE, relay discovery) through configurable parameters rather than separate complex systems for each scenario.
Solution Approach 2:
Different security scenarios are accommodated by changing security scheme parameters rather than changing the fundamental system structure. The source UE and relay UE can select from different security schemes based on the discovery scenario, and the same message formats and procedures are used with different security parameter configurations, maintaining system simplicity while providing adaptability.
Data Source
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AI summary
Embodiments of the present disclosure provide a transmitting method and receiving method for a relay discovery message, a terminal, and a device. The transmitting method comprises: a discoverer terminal generating a first relay discovery request message, wherein a direct discovery dataset of the first relay discovery request message comprises an identifier of the discoverer terminal and an identifier of a discoveree terminal; and transmitting the first relay discovery request message.