Relay WTRU IP Identifier Updates for Private Sidelink Communication
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Solution Overview
Problem
Privacy and security issues need to be addressed for wireless transmit receive units (WTRUs) communicating via unicast sidelinks, such as vehicle-to-everything (V2X) links, to ensure secure and private communication.
Innovation Solution
A WTRU requests a relay WTRU to change its IP identifier and authorizes the relay WTRU to share the new IP identifier with target WTRUs, using unicast links for IP identifier updates through link identifier update messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If WTRUs communicate via unicast sidelinks using fixed IP identifiers, then communication stability is maintained, but privacy and security are compromised
Solution Approach 1:
The patent implements dynamic IP identifier changes where WTRUs periodically update their IP identifiers used in sidelink communications. The source WTRU changes its IP identifier from a first IP identifier to a second IP identifier, and the target WTRU is informed of this change through the relay WTRU. This dynamic adjustment maintains communication stability while enhancing privacy and security by preventing tracking through static identifiers.
Solution Approach 2:
The patent changes the IP identifier parameter periodically to address privacy and security concerns. The source WTRU transitions from using a first IP identifier to a second IP identifier, and this parameter change is propagated through the relay WTRU to the target WTRU. This parameter transformation allows the system to maintain reliable communication while protecting user privacy and security.
2Object-affected harmful factors
If IP identifiers are changed dynamically to enhance privacy, then security is improved, but communication complexity increases
Solution Approach 1:
The patent introduces a relay WTRU as an intermediary to manage IP identifier changes. The source WTRU communicates its IP identifier change to the relay WTRU, which then forwards this information to the target WTRU. This intermediary approach simplifies the complexity by centralizing the management of identifier changes rather than requiring direct coordination between all communicating WTRUs.
Solution Approach 2:
The patent implements preliminary notification mechanisms where the source WTRU informs the relay WTRU about upcoming IP identifier changes before they take effect. The relay WTRU then prepares to forward this information to target WTRUs, ensuring seamless communication continuity. This preliminary action reduces complexity by pre-coordinating identifier changes rather than reacting to them after disruption occurs.
3Object-affected harmful factors
If relay WTRU is used to manage IP identifier changes, then privacy protection is enhanced, but message transmission overhead increases
Solution Approach 1:
The patent merges the IP identifier change notification with existing sidelink communication messages. Instead of sending separate dedicated messages for identifier changes, the information is integrated into the ongoing communication flow between WTRUs through the relay. This merging reduces message transmission overhead while maintaining privacy protection through the relay WTRU's mediation.
Data Source
AI summary
Systems, methods and instrumentalities are described herein that provide security and/or privacy support for wireless transmit receive units (WTRUs) communicating via a WTRU to WTRU relay. A source WTRU may obtain a new IP address from a relay WTRU via a link identifier update request. The source WTRU may indicate to the relay WTRU which one or more target WTRUs are to be informed of the new IP address. The source WTRU may indicate to the relay WTRU whether the target WTRU's ID(s) should be changed. The relay WTRU may send the source WTRU's new IP address to authorized target WTRUs. The source, relay, and target WTRU may use tokens to grant or receive authorizations for sharing each other's IP addresses.