CSFB Device Mode Switching for LTE Packet Service Access
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Solution Overview
Problem
LTE networks that only support packet-based services and lack circuit switch functionality cannot provide voice calling services to legacy devices that rely on the circuit switch fallback mechanism, leading to these devices being unable to attach to the LTE network for high-speed Internet services or voice calling.
Innovation Solution
A system and method that modify user equipment to switch from a voice centric mode to a data centric mode, allowing it to latch onto an LTE-only network for packet-based services through over-the-top or rich communication services, using a broadcast module to determine network capabilities and a service provider module to enable voice calling services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If LTE network supports only packet based services without circuit switch functionality, then network simplicity and high-speed Internet service are improved, but legacy CSFB devices cannot attach to the network for voice calling services
Solution Approach 1:
The patent changes the operational parameters of user equipment by introducing a mode switch mechanism that allows CSFB devices to operate in data centric mode when attaching to LTE networks. This parameter change enables legacy devices to function on packet-only networks by modifying their operational state rather than changing network architecture.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of a mode switch that acts as a mediator between legacy CSFB devices and LTE packet-only networks. This intermediary component enables compatibility by translating the operational requirements of CSFB devices to work within the constraints of packet-only network architecture.
2Reliability
If user equipment operates in voice centric mode, then voice calling capability is maintained, but device cannot latch onto LTE only network for high-speed Internet services
Solution Approach 1:
The patent applies dynamics by introducing a mode switch that allows user equipment to dynamically change between voice centric mode and data centric mode based on network capabilities and service requirements. This dynamic adaptation enables devices to optimize their operation for either voice calling or high-speed Internet access depending on the situation.
Solution Approach 2:
The patent changes the operational parameters of user equipment by introducing a mode switch mechanism that allows CSFB devices to operate in data centric mode when attaching to LTE networks. This parameter change enables legacy devices to function on packet-only networks by modifying their operational state rather than changing network architecture.
3Adaptability or versatility
If LTE network provides circuit switch fallback functionality, then voice calling service coverage is expanded, but network complexity and requirement for additional infrastructure increase
Solution Approach 1:
The patent extracts the circuit switch functionality requirement from the network infrastructure by enabling voice calling services through packet-based mechanisms. This extraction allows the network to maintain simplicity while still providing voice services to CSFB devices through alternative packet-switched paths.
Solution Approach 2:
The patent substitutes traditional circuit switch mechanical connectivity with packet-based communication mechanisms. By replacing the physical circuit switching infrastructure with software-based packet routing and processing, the network achieves voice service capability without the corresponding hardware complexity.
Data Source
AI summary
Systems and methods may provide at least one service to a user equipment in an IP network subsystem supporting packet based services, wherein the user equipment is operating in a voice centric mode. Embodiments may receive a broadcast of at least one information of the IP network subsystem through at least one system information message, determine a network capability information at the user equipment based on the at least one information of the IP network subsystem, switch the user equipment from the voice centric mode to a data centric mode, wherein in the data centric mode, the user equipment is subscribed to receive the packet based services, latch the user equipment with the IP network subsystem when one of an over the top and a rich communication service allows the latching, and receive the at least one service at the user equipment via one of the over-the-top and the rich communication services.