UE Configuration for Emergency Call Prioritization
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Solution Overview
Problem
Wireless communication systems face challenges in facilitating emergency calls, particularly when user equipment (UE) moves from one radio access technology to another, as existing systems may not support autonomous mode changes or prioritize emergency calls, leading to performance issues and inability to provide callback services.
Innovation Solution
The method involves modifying configuration parameters related to network, cell, or service selection within the wireless communication system to prioritize networks or services that support emergency calls, allowing the UE to autonomously change modes and preferences for emergency call initiation, ensuring seamless emergency call service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE autonomously returns to the LTE system after emergency call ends or failure due to CS/PS mode or cell reselection priority settings, then the UE can maintain its original network preference, but callback services cannot be provided and performance suffers if re-origination is needed
Solution Approach 1:
The patent implements dynamic modification of UE configuration parameters (CS/PS mode and cell reselection priorities) that persists after emergency call termination. The network controller sends modification commands to the UE to change its network selection behavior, ensuring the UE remains adapted to the emergency service network rather than automatically returning to LTE, thereby maintaining service reliability while preserving adaptability
Solution Approach 2:
The patent changes the operational parameters of the UE by modifying configuration settings related to CS/PS mode and cell reselection priorities. These parameter changes are transmitted from the network controller to the UE and persist beyond the emergency call duration, fundamentally altering the UE's network selection behavior to prevent automatic return to LTE and ensure continued availability for callback services
2Reliability
If the UE modifies configuration parameters to prefer emergency-capable networks, then emergency call service is improved, but the device complexity increases
Solution Approach 1:
The patent enables the UE to autonomously modify its own configuration parameters (CS/PS mode and cell reselection priorities) based on received commands from the network controller. The UE self-manages the configuration changes and maintains them in its memory, reducing the need for continuous network intervention and simplifying overall system complexity while ensuring reliable emergency call service
Solution Approach 2:
The network controller acts as an intermediary that manages the complexity of configuration parameter modifications. It formulates and sends modification commands to the UE, which then autonomously applies these changes. This intermediary approach centralizes the complexity management in the network controller while keeping the UE implementation relatively simple
Data Source
AI summary
Systems and methods for facilitating emergency call service are provided. The method can include modifying a configuration parameter of a user equipment (UE), wherein the configuration parameter is related to at least one of: network selection, cell selection or reselection or service selection within a wireless communication system, and wherein a modified configuration parameter results in a preference by the UE for a network, cell or service configured to support emergency calls at the UE. The method can also include prioritizing circuit-switched services over packet-switched services, utilizing the circuit-switched voice service preferentially or exclusively and/or prioritizing a network configured to offer emergency call service over the original serving network of the UE, based, at least, on the modifying the configuration parameter. Modifying the configuration parameter can be performed autonomously by the UE. The modified configuration can also enable callback services to a UE from the network.