Call Continuity Switching Between WLAN, 5G NR, and LTE
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Solution Overview
Problem
Electronic devices experience time delays during call handovers between 5G and 4G communication schemes due to EPS fallback procedures, leading to disruptions in call connections when signal quality deteriorates in wireless LAN communication.
Innovation Solution
The electronic device is configured to register with a 5G network, maintain a call connection using wireless LAN communication, and upon signal quality degradation, seamlessly transition to a 4G LTE network while restricting 5G communication, thereby minimizing handover delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic device performs EPS fallback and handover procedures to maintain call connection during signal quality degradation, then the call connection reliability is improved, but time delay increases
Solution Approach 1:
The electronic device performs preliminary actions by pre-configuring handover parameters and maintaining registration with both 5G and 4G networks simultaneously. When signal quality degradation is detected in 5G, the device already has prepared 4G network information and can execute handover without waiting for network initiation, thereby reducing handover time delay while maintaining connection reliability.
Solution Approach 2:
The patent introduces an intermediary mechanism where the electronic device acts as a mediator between 5G and 4G networks. By maintaining dual registration and using the device's own decision-making logic to trigger handovers based on signal quality thresholds, the device creates a controlled transition path that reduces the time delay associated with traditional network-initiated EPS fallback procedures.
2Adaptability or versatility
If the electronic device uses wireless LAN communication for call function, then communication flexibility is improved, but signal quality stability deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the communication mode based on signal quality parameters. The device monitors wireless LAN signal quality and changes the communication parameter (network type) from 5G to 4G when signal degradation is detected. This allows the device to maintain communication flexibility through wireless LAN while compensating for signal quality instability by switching to more stable 4G networks when needed.
Data Source
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AI summary
Provided is a method and apparatus for providing call function continuity in an electronic device. The electronic device may include: a first communication circuit configured to support new radio (NR) communication and/or long-term evolution (LTE) communication, a second communication circuit configured to support wireless LAN communication, and at least one processor operatively connected to the first communication circuit and the second communication circuit, wherein the processor is configured to control the electronic device to: register with a network of the NR communication via the first communication circuit; connect a call to an external device using the wireless LAN communication based on being in a state of being registered with the network of the NR communication; based on the call connection to the external device using the wireless LAN communication, restrict use of the NR communication; and based on the restriction of the use of the NR communication, register with a network of the LTE communication via the first communication circuit.