Emergency Bearer Context Deactivation for Wireless Networks
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Solution Overview
Problem
Current wireless communication systems face challenges in establishing emergency services when the user equipment (UE) has already maximized its resources for non-emergency purposes, leading to delays or inability to establish emergency calls due to resource constraints and access class barring.
Innovation Solution
The UE unilaterally deactivates at least one active context without affecting others, synchronizes context status information with the network, and uses an extended service request to establish emergency services, allowing for efficient resource allocation and prioritization of emergency calls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE maintains maximum number of active contexts for non-emergency services, then resource utilization for normal operations is optimized, but the ability to establish emergency services is blocked when all contexts are already in use
Solution Approach 1:
The UE proactively deactivates one or more non-emergency contexts before attempting to establish an emergency service, ensuring that sufficient resources are available for emergency calls. This preliminary action prevents resource conflicts by preparing the system in advance for potential emergency scenarios.
Solution Approach 2:
The system dynamically changes the state of contexts from active to inactive based on service requirements. When emergency services are needed, the UE modifies the context activation status to free up resources, allowing the same resource pool to serve both normal operations and emergency scenarios effectively.
2Reliability
If the UE deactivates contexts to establish emergency services, then emergency call establishment is enabled, but non-emergency connections are disrupted
Solution Approach 1:
The UE extracts or isolates specific non-emergency contexts for deactivation while preserving other contexts that may be relevant to emergency services. This selective approach allows the system to free up necessary resources without completely disrupting all non-emergency connections, maintaining operational continuity where possible.
Solution Approach 2:
Different contexts are treated differently based on their specific characteristics and importance. The UE applies local quality by selectively deactivating only those contexts that are least critical to emergency operations, while maintaining other contexts that could support emergency services or are essential for quick reconnection after the emergency.
3Stability of the object's composition
If the network requires synchronization of context status information, then network-UE consistency is maintained, but additional signaling overhead and delay are introduced during emergency establishment
Solution Approach 1:
The UE performs context deactivation and prepares context status information before the network synchronization step. By having the context status ready in advance, the actual synchronization process during emergency establishment is shortened, reducing the time penalty associated with maintaining network-UE consistency.
Data Source
AI summary
A method, user equipment and non-transitory computer readable memory for establishing an emergency service using a wireless network includes unilaterally deactivating, at the user equipment when the user equipment needs to establish an emergency service, at least one active context with the wireless network without deactivating at least one other active context. Thereafter directing to the wireless network, a request to establish the emergency service that identifies the emergency service and one or more contexts that remain active after the unilateral deactivation of the at least one active context by the user equipment, synchronizing, in response to and based on the request, current context status information of the user equipment with the wireless network, and then establishing the emergency service using the wireless network with which the active context was deactivated.