Dynamic VoLTE Parameter Retrieval for Roaming Wireless Devices
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Solution Overview
Problem
Current solutions fail to effectively pre-configure VoLTE parameters for wireless devices, especially in machine-type communication devices and during roaming, leading to unreliable VoLTE operation in specific cellular networks.
Innovation Solution
A method for a wireless device to check for available VoLTE configuration parameters before setting up a voice call, requesting and storing them from a parameter server if necessary, and applying these parameters to ensure interoperability with the cellular network, using a UICC or eSIM for authentication and configuration management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-configuration of VoLTE parameters is performed before shipping, then mobile handsets can operate VoLTE reliably in their home network, but machine-type communication devices and roaming devices cannot obtain proper configuration
Solution Approach 1:
The patent applies preliminary action by pre-configuring a default set of VoLTE parameters in the wireless device before deployment. This default configuration enables the device to attempt VoLTE operation immediately, while the system simultaneously prepares for dynamic updates when the device connects to a network, thus resolving the contradiction between having initial configuration and adapting to specific networks.
Solution Approach 2:
The patent implements dynamics by transitioning from static pre-configuration to dynamic parameter retrieval. The wireless device initially uses default parameters but automatically requests and applies network-specific configuration parameters when camping on a base node, enabling adaptability to different networks and device types while maintaining reliability through updated configurations.
2Device complexity
If configuration parameters are stored in the identification unit, then device complexity is reduced, but the configuration may become outdated for roaming or MTC devices
Solution Approach 1:
The patent applies feedback by implementing an automatic configuration update mechanism. When the wireless device camps on a base node, it checks whether configuration parameters are available from the network, retrieves updated parameters if needed, and applies them. This feedback loop ensures configuration accuracy is maintained without increasing device complexity, as the update process is automated.
3Adaptability or versatility
If configuration parameters are downloaded from a parameter server, then adaptability to different networks is improved, but the amount of data to be downloaded and processed increases
Solution Approach 1:
The patent applies the extraction principle by separating the configuration update process into selective parameter retrieval. Instead of downloading complete configuration sets, the system extracts only the necessary VoLTE-related parameters from the parameter server when needed. This reduces the quantity of data to be downloaded and processed while maintaining network compatibility through targeted parameter updates.
Data Source
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AI summary
The present invention relates to a method for a wireless device (1) of providing a voice service via packet switched communication with an operating cellular network (3), being the cellular network the wireless device is operating in, wherein the wireless device is physically connected to an identification unit (5), said identification unit comprising a first memory block for storing at least one set of configuration parameters for said voice service within a first cellular network, the first cellular network according to the identification unit is different from the operating cellular network (3), hereinafter the visited cellular network, further the wireless device is camping on a base node (2) of the visited cellular network, the method comprising the step for the wireless device of: prior to setting up a voice call, checking with the identification unit if a set of configuration parameters applicable to the visited cellular network is available, if not, requesting said configuration parameters from a parameter server (7) accessible for the visited cellular network by means of routing information, receiving said configuration parameters from said parameter server, storing at least a portion of received configuration parameters in a second memory block of the identification unit, if the configuration parameters are available, or previously received from the parameter server: applying said configuration parameters to the wireless device, setting up a voice call using said configuration parameters.