Relay UE Authorization Check for RRC Idle State Access
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Solution Overview
Problem
In current UE relay technologies, a relay UE in an RRC idle or inactive state cannot be determined to be authorized for providing a relay service, leading to failed network access for remote UEs attempting to use unauthorized relay services.
Innovation Solution
A communication method where a network device receives information about a terminal device's state and uses a second network device to determine authorization for providing a relay service, allowing network access even if the terminal device is in an RRC non-connected state by sending identifiers and state information to determine authorization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the relay UE is in an RRC idle state or an RRC inactive state, then the relay UE can save energy and reduce network signaling overhead, but the base station cannot determine whether the relay UE is authorized to provide a relay service, leading to failed network access for remote UE
Solution Approach 1:
The patent applies preliminary action by having the terminal device send authorization indication information to the network device before attempting to use the relay service. This allows the network device to verify authorization in advance, ensuring reliable network access while the terminal device remains in an energy-saving RRC idle or inactive state. The authorization check is performed before the relay connection is established, preventing failed access attempts.
Solution Approach 2:
The patent introduces an intermediary mechanism where the terminal device acts as a mediator between the relay UE and the network. The terminal device receives and forwards authorization indication information from the network device to the relay UE, enabling the network to verify authorization without requiring the relay UE to be in an RRC connected state, thus maintaining energy efficiency while ensuring access reliability.
2Reliability
If the relay UE is in an RRC connected state, then the base station can determine whether the relay UE is authorized to provide a relay service, but the relay UE consumes more energy and generates more network signaling overhead
Solution Approach 1:
The patent applies preliminary action by performing authorization verification before establishing an RRC connected state. The network device sends authorization indication information to the terminal device, which then forwards it to the relay UE. This allows authorization determination to be completed while the relay UE remains in an energy-saving state, avoiding the need to maintain a continuous RRC connected state solely for authorization checks.
Solution Approach 2:
The patent enables self-service by allowing the terminal device to handle the authorization verification process independently. The terminal device receives authorization indication information from the network device and uses it to determine whether the relay UE is authorized, without requiring the relay UE to actively participate in RRC signaling. This reduces the energy consumption and signaling overhead for the relay UE while maintaining reliable authorization determination.
3Object-affected harmful factors
If the remote UE attempts to access the network by using the UE that is not authorized to provide a relay service, then the system prevents unauthorized access, but the remote UE fails to access the network
Solution Approach 1:
The patent applies preliminary action by performing authorization verification before allowing the remote UE to access the network through the relay UE. The network device sends authorization indication information to the terminal device in advance, which then determines whether the relay UE is authorized. This preliminary check ensures that only authorized relay UEs are used for network access, preventing unauthorized access while maintaining high network access success rates for legitimate users.
Data Source
AI summary
A first network device receives first information from a second terminal device or a third network device, where the first information includes an identifier of a first terminal device, and the third network device is a network device on which the second terminal device camps. The first network device sends the identifier of the first terminal device to a second network device, where the identifier of the first terminal device is usable to determine whether the first terminal device is authorized to provide a relay service. The first network device receives second information from the second network device, where the second information indicates whether or not the first terminal device is authorized to provide a relay service.