Relay Service Authorization via Policy Control Function
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Solution Overview
Problem
Existing systems lack a centralized method to authorize relay service relationships between remote and relay terminals, particularly in scenarios where network coverage is limited or communication signals are poor, and there is a need to ensure secure and appropriate relay terminal selection.
Innovation Solution
A policy control function device determines authorization results for relay service relationships based on terminal identifiers, using association information and centralized databases to manage authorization, ensuring secure and appropriate relay terminal selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a terminal accesses the network directly using an access network device, then network access speed and signal quality are improved, but network coverage is limited to areas with direct access network device coverage
Solution Approach 1:
The patent introduces a relay terminal as an intermediary device between the remote terminal and the access network device. The relay terminal receives and forwards communication signals, enabling network access in areas without direct coverage while maintaining signal quality through established communication paths.
2Adaptability or versatility
If any relay terminal is allowed to provide relay service to any remote terminal, then network coverage and accessibility are improved, but security control and authorization management become difficult
Solution Approach 1:
The patent implements a feedback mechanism where the policy control function device receives relay service relationship establishment requests, determines authorization results based on stored authorization information, and provides feedback to control whether the relay service relationship is established. This enables centralized security control while maintaining service accessibility.
3Reliability
If centralized authorization management is implemented through policy control function devices, then security control and authorization accuracy are improved, but system complexity and signaling overhead increase
Solution Approach 1:
The patent makes the policy control function device a universal authorization management component that handles both direct network access authorization and relay service relationship authorization. This multi-functional approach consolidates authorization management into an existing system component, reducing overall system complexity while maintaining centralized control and authorization accuracy.
Data Source
AI summary
An authorization method includes receiving, by a policy control function device of a relay terminal, a request message from an access and mobility management function device of the relay terminal. The request message includes an identifier of a remote terminal and an identifier of the relay terminal. The method also includes determining, by the policy control function device, an authorization result based on the identifier of the remote terminal and the identifier of the relay terminal. The authorization result indicates whether the relay terminal and the remote terminal are authorized to establish a relay service relationship. The method further includes sending, by the policy control function device, the authorization result to the access and mobility management function device.