Disaster Roaming Device Mobility Control
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Solution Overview
Problem
In wireless networks, disaster conditions lead to service interruptions when only the radio access network fails, causing user equipment to lose coverage, and existing solutions do not effectively manage mobility enhancements for disaster roaming devices to minimize service disruptions.
Innovation Solution
Implementing a system that includes a processor and transceiver to receive configuration messages for selecting suitable cells for disaster roaming, determining candidate cells and frequency layers, and transmitting information about disaster roaming service areas and priority settings to ensure seamless service continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If disaster roaming is enabled to maintain service continuity, then service reliability is improved, but network complexity increases due to additional mobility management requirements
Solution Approach 1:
The patent segments the mobility management process by introducing specific configuration messages that divide the cell selection procedure into distinct phases: receiving disaster roaming configuration, determining candidate cells, and selecting suitable cells. This segmentation simplifies the overall complexity by providing structured guidance for each step of the disaster roaming process.
Solution Approach 2:
The patent applies preliminary action by pre-configuring disaster roaming parameters and candidate cell information before actual disaster conditions occur. The network sends configuration messages in advance that contain frequency layer information, cell selection criteria, and other necessary parameters, so that when disaster conditions arise, UEs can immediately execute the pre-planned cell selection without complex real-time decision-making.
2Loss of time
If UEs autonomously select cells for disaster roaming, then service interruption is minimized, but measurement precision deteriorates due to limited network control
Solution Approach 1:
The patent implements feedback mechanisms where UEs report their cell selection status and measurements back to the network. The network can then provide corrective configuration messages or updates to candidate cell lists, creating a closed-loop system that maintains measurement precision while allowing autonomous operation. This feedback ensures that autonomous UE selections remain aligned with network objectives and accurate cell evaluation criteria.
Solution Approach 2:
The patent enables dynamic parameter changes by allowing the network to update configuration parameters, frequency priorities, and cell selection criteria based on changing conditions. The UE can adjust its cell selection behavior by modifying internal parameters based on received configuration messages, thereby maintaining measurement precision through adaptive parameter adjustment while preserving autonomous selection capability.
3Ease of operation
If frequency layer prioritization is implemented for disaster roaming, then mobility control is improved, but device complexity increases due to additional configuration parameters
Solution Approach 1:
The patent applies universality by designing the frequency layer prioritization configuration to serve multiple functions simultaneously: it guides cell selection, manages mobility across different frequency layers, and provides a standardized framework that can be applied to various disaster scenarios. This multi-functional approach consolidates what would otherwise require multiple separate configuration mechanisms, thereby improving mobility control without proportionally increasing complexity.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for mobility enhancements for disaster roaming devices. An apparatus (800) includes a transceiver (825) and a processor (805) coupled to the transceiver (825). The processor (805) is configured to cause the apparatus (800) to receive a first message comprising a configuration for selecting a suitable cell for disaster roaming, determine candidate cells and frequency layers for selecting the suitable cell according to the received configuration, and select the suitable cell for disaster roaming based on the determined candidate cells and frequency layers.