Peer Discovery Using IP Address Prefixes
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Solution Overview
Problem
Current mobile communication networks face challenges in peer discovery for proximity services, particularly in direct device-to-device communication, due to security issues and complexity arising from the use of LTE identifiers, which require additional signaling load and lack mapping between applications and communication layer identifiers.
Innovation Solution
The proposed solution involves using the prefix of an IP address as an identifier in discovery messages, allowing devices to detect proximity and application-level connections directly, without routing through the base station, and utilizing IPv6 addresses for efficient mapping and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LTE identifiers are used for peer discovery, then device identification is enabled, but security issues and complexity arise along with additional signaling load
Solution Approach 1:
The patent extracts the essential identification function from LTE identifiers and implements it using IP address prefixes instead. By taking out the identification mechanism from the LTE signaling framework and placing it in the IP networking layer, the solution eliminates the security issues and complexity associated with LTE identifier-based discovery while maintaining the core functionality of device identification.
Solution Approach 2:
The patent applies IP address prefixes for multiple purposes: device identification, proximity detection, and application-level connection detection. This universal approach replaces the specialized LTE identifier system, reducing signaling load while enabling peer discovery to leverage existing IP networking infrastructure and mappings.
2Reliability
If LTE identifiers are used for peer discovery, then device identification is enabled, but mapping between applications and communication layer identifiers is lacking
Solution Approach 1:
The patent introduces IP address prefixes as an intermediary between application-layer identifiers and communication-layer identifiers. This intermediary leverages existing IP networking infrastructure and natural mappings that already exist in the network, enabling seamless connection detection without requiring new mapping mechanisms or increasing system complexity.
3Reliability
If base station routing is used for discovery messages, then network control is maintained, but direct device-to-device communication efficiency is reduced
Solution Approach 1:
The patent segments the discovery message transmission into two parts: control plane messages still route through the base station for network control, while data plane discovery messages can be transmitted directly between devices using IP address prefixes. This segmentation allows simultaneous maintenance of network control and improvement of communication efficiency for peer discovery.
Data Source
AI summary
There is provided a method, including: causing, by a second node, reception of a discovery message on a radio layer directly from a first node, wherein the discovery message indicates at least the prefix of the internet protocol, IP, address corresponding to the first node; detecting whether or not there exist an application layer connection between the first node and the second node, wherein the application layer is a higher layer than the radio layer and the detection is at least partly based on the acquired prefix; and upon detecting that the application layer connection exists, indicating the existence of the application layer connection to a network element associated with the second node.