UE Redundancy Group for Wireless Network Failover
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Solution Overview
Problem
Wireless user equipment (UE) may become unavailable due to hardware failures or connection interruptions, disrupting communication with application servers and other devices, which can lead to service disruptions and failures to meet reliability and availability requirements.
Innovation Solution
Implementing a UE redundancy group system where a primary UE and one or more backup UEs are registered with a network, allowing the backup UE to automatically detect and resume operations of the primary UE in case of failure, using device-to-device connections and expedited network registration procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single primary UE is used for communication, then device complexity is reduced, but reliability deteriorates due to hardware failures or connection interruptions
Solution Approach 1:
The system performs preliminary actions by pre-registering backup UEs and establishing device-to-device connections before the primary UE fails. The backup UE is already configured with necessary communication parameters and can immediately take over when the primary UE becomes unavailable, eliminating the need for complex real-time failure detection and setup procedures.
Solution Approach 2:
The network entity acts as an intermediary that coordinates the redundancy group operations. It manages the registration of backup UEs, monitors their status, and facilitates the seamless transition from primary to backup UE. This intermediary approach simplifies the overall system complexity by centralizing control logic rather than distributing it across multiple UEs.
2Speed
If backup UE is always connected to network, then failover speed is improved, but energy consumption increases
Solution Approach 1:
The backup UE's connection state is made dynamic rather than static. It maintains a reduced connection with the network when not actively needed, and can quickly transition to a full operational connection when failover is required. This dynamic state adjustment optimizes both energy consumption and failover speed by adapting the connection level to current operational needs.
3Reliability
If multiple backup UEs are registered, then reliability is improved through redundancy, but device complexity increases
Solution Approach 1:
The redundancy group is segmented into distinct roles (primary UE, backup UEs) with clearly defined responsibilities. Each UE in the group operates independently with a specific function, and the network entity manages them as separate but coordinated units. This segmentation simplifies the management of multiple backup UEs by avoiding the need for complex peer-to-peer coordination protocols.
Data Source
AI summary
A first User Equipment (“UE”) may communicate with a second UE via a communication link to determine an operational status of the second UE. The second UE may be connected to a network via one or more communication sessions. The first UE may determine, based on the communication link, that the second UE is non-operational, and may output, based on determining that the second UE is non-operational, a request to communicate with the network via the one or more communication sessions associated with the second UE. The network may modify the one or more communication sessions to be associated with the first UE based on the request, and the first UE may communicate with the network via the one or more modified communication sessions.