Virtual Relay Context Switching for Service-Continuous UE Relays
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Solution Overview
Problem
Existing UE-to-Network relay systems experience frequent service interruptions and high signaling overhead due to dynamic changes in radio conditions, leading to frequent relay reselection, which disrupts service continuity.
Innovation Solution
Implementing virtual relay context information that is pre-configured for multiple relay candidates, allowing seamless switching between them without additional signaling, by using the same context information for relaying traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If relay reselection is performed frequently due to dynamic radio conditions, then the system can adapt to changing conditions, but service continuity is disrupted and service interruption increases
Solution Approach 1:
The network pre-configures virtual relay context information for multiple potential relay UEs before they are actually selected. This preliminary configuration includes storing context information such as C-RNTI, security parameters, and bearer configurations for candidate relay UEs, so that when reselection is needed, the remote UE can immediately switch to a pre-configured relay without waiting for new configuration, thus maintaining service continuity while adapting to changing conditions
2Reliability
If relay reselection is performed frequently to maintain connection quality, then connection reliability is improved, but signaling overhead increases due to repeated configuration procedures
Solution Approach 1:
The network performs preliminary configuration of virtual relay context information for multiple candidate relay UEs in advance, storing this information in the remote UE's memory. When relay reselection occurs, the remote UE can directly apply the pre-stored context information without requiring repeated RRC reconfiguration signaling with the network, thereby reducing signaling overhead while maintaining connection reliability through seamless switching
Solution Approach 2:
The network creates and stores copies of relay context information for multiple candidate relay UEs. These copied context configurations are kept ready in the remote UE, allowing immediate replication and application of the correct context when switching between relays, eliminating the need for repeated configuration signaling and reducing network load
3Adaptability or versatility
If traditional relay configuration is used with dynamic reselection, then the system follows standardized procedures, but service interruption occurs during relay switching
Solution Approach 1:
The network pre-configures virtual relay context information for multiple potential relay UEs before actual selection occurs. This preliminary action stores all necessary configuration parameters (C-RNTI, security keys, bearer mappings) for candidate relays in the remote UE's memory, enabling immediate application upon selection without waiting for network configuration, thus eliminating service interruption while maintaining standard compliance
Solution Approach 2:
The remote UE is enabled to self-configure by applying pre-stored virtual relay context information when switching between relay UEs. The UE autonomously selects and applies the appropriate pre-configured context without requiring real-time network intervention or configuration signaling, thereby eliminating service interruption time while maintaining compliance with standardized procedures
Data Source
AI summary
In one embodiment, the method includes obtaining virtual relay context information enabling by one or more relay mobile device candidates to relay traffic; and applying the virtual relay context information to be configured as a respective relay mobile device of the one or more relay mobile device candidates for relaying traffic.