Paging Failure Detection and UE Mode Transition in Hybrid Networks
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Solution Overview
Problem
Hybrid wireless communication systems, such as those combining LTE and CDMA networks, often experience paging failures that can lead to service delays and connection failures, particularly when a UE is operating in CSFB mode and the LTE network fails to successfully page a UE for a CDMA network-initiated call.
Innovation Solution
The system detects a threshold extent of paging failure and transitions selected UEs from CSFB mode to non-CSFB mode, allowing them to register directly with the CDMA network and engage in call setup signaling via the CDMA air interface, thereby ensuring reliable voice call establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UEs operate in CSFB mode with LTE network paging, then service coverage and data communication are improved, but paging failures occur leading to voice call connection failures
Solution Approach 1:
The system dynamically switches UE operation mode from CSFB to non-CSFB based on real-time paging success rate monitoring. When paging failure rate exceeds threshold, the system transitions affected UEs to non-CSFB mode, making the system adaptable to changing network conditions and eliminating the static limitation of fixed CSFB operation
Solution Approach 2:
The invention changes the operational parameter of UEs from CSFB mode to non-CSFB mode. This parameter change allows UEs to register directly with CDMA network and use CDMA air interface for call setup, fundamentally altering the communication path to bypass the paging failure issue in LTE network
2Device complexity
If UEs remain in CSFB mode during paging failures, then network configuration simplicity is maintained, but service delays and connection failures increase
Solution Approach 1:
The system implements dynamic mode switching that activates non-CSFB operation only when paging failures are detected. This maintains network configuration simplicity under normal conditions while automatically adapting to resolve service delays when failures occur, avoiding permanent complexity increase
3Reliability
If the system transitions UEs to non-CSFB mode upon detecting paging failures, then voice call reliability is improved, but device operation complexity increases
Solution Approach 1:
The network system automatically performs mode transition for affected UEs without requiring user intervention or complex device-side configuration. The UE simply responds to network commands to switch modes, making the complexity management responsibility lie with the network rather than the device
Solution Approach 2:
The mode transition is dynamic and conditional, occurring only when paging failures are detected. UEs operate in simple CSFB mode under normal conditions and automatically switch to non-CSFB mode only when necessary, minimizing the impact on ease of operation
Data Source
AI summary
In accordance with the disclosed methods and systems, while providing a service that enables user equipment devices (UEs) being served by a first network to engage in signaling with a second network via the first network, a controller or other network entity may detect a failure of paging in the first network. In response to detecting the failure of paging, the first network may then cause one or more UEs being served by the first network to transition from operating in a first mode that uses the given service to operating in a second mode that does not use the given service.