Remote UE Identification via Relay C-RNTI Allocation
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Solution Overview
Problem
In network traffic management, remote User Equipments (UEs) connected indirectly via a UE-to-Network (UE-to-NW) relay face challenges in obtaining necessary identification information, such as a Cell-Radio Network Temporary Identifier (C-RNTI), which is crucial for procedures like RRC reestablishment, resume, and handover, but are unable to perform these procedures due to lack of direct communication with the network.
Innovation Solution
The proposed solution involves mechanisms for remote UEs to obtain identification information through a UE-to-NW relay, where the relay UE allocates and informs the remote UE of its C-RNTI, enabling proper identification and communication with the network node, even in scenarios without direct network access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a remote UE connects to the network via a UE-to-NW relay, then network coverage is extended to areas without direct network access, but the remote UE cannot obtain necessary identification information (C-RNTI) for network procedures
Solution Approach 1:
The relay UE acts as an intermediary between the remote UE and the network node. It receives identification information from the network node and forwards it to the remote UE, enabling the remote UE to participate in network procedures without direct network access. This mediator approach resolves the contradiction by allowing network coverage extension while preserving necessary identification information through the relay mechanism.
2Reliability
If the relay UE allocates C-RNTI to the remote UE, then the remote UE can participate in RRC reestablishment and handover procedures, but the relay UE must manage additional identification information
Solution Approach 1:
The relay UE autonomously performs the allocation and management of C-RNTI to the remote UE without requiring direct network intervention for each allocation. The relay UE maintains its own context and manages the identification information locally, enabling reliable network procedure participation while minimizing the complexity increase through self-service management mechanisms.
Data Source
AI summary
A method for managing network traffic in a network is provided. The method is performed by a remote user equipment (UE). The method includes receiving a first message from a first network node via a relay UE. The first message includes identity information for use in identifying the remote UE to the first network node when the first network node is serving the remote UE. The relay UE is capable of relaying network traffic between the first network node and the remote UE when the first network node is serving the remote UE.