Wireless Interface Selection for Reduced Call Setup Latency
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Solution Overview
Problem
Current mobile devices face inefficiencies in power consumption and latency during voice call setup due to their reliance on data-only technologies like LTE, which increases latency and reduces user experience, and existing solutions do not effectively manage radio access technologies to optimize power usage and voice call setup times.
Innovation Solution
A mobile apparatus and method that intelligently selects and operates radio access technologies by evaluating the status of wireless interfaces and processor states to selectively enable or disable high-speed cellular interfaces like LTE, opting for lower-power voice-capable technologies when not required, and utilizing ad hoc networks like Wi-Fi for data operations to minimize power consumption and reduce call setup latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the device uses high-speed data-only technology (LTE) to maximize network efficiency, then data transmission speed is improved, but voice call setup latency increases and power consumption rises
Solution Approach 1:
The system dynamically switches between different radio access technologies (LTE, WCDMA, GSM) based on real-time operational conditions. The logic monitors processor state and actively selects the most appropriate technology, transitioning from static LTE-only operation to adaptive multi-technology operation, thereby reducing voice call setup latency while maintaining data speed efficiency.
Solution Approach 2:
The invention changes the operational parameters of the wireless transceiver by adjusting the selected radio access technology based on processor state. When the processor is in a low-power state, the system switches from LTE to voice-capable technologies (WCDMA/GSM), altering the technical parameter of network technology selection to optimize both latency and power consumption.
2Productivity
If the device remains camped on LTE interface to maintain data service, then data connectivity is improved, but voice call setup time increases due to required handover
Solution Approach 1:
The system performs preliminary actions by proactively switching to voice-capable technologies (WCDMA or GSM) when detecting that the processor will enter a low-power state. This advance preparation ensures that when a voice call is needed, the device is already camped on the appropriate interface, eliminating the need for handover during call setup and reducing latency.
Solution Approach 2:
The invention implements dynamic technology selection that adapts to predicted processor states. Rather than statically remaining on LTE, the system dynamically transitions between LTE and voice-capable technologies based on anticipated processor activity, enabling seamless voice call setup without handover delays while maintaining data service capability.
3Ease of operation
If the device continuously monitors and switches between radio access technologies to optimize performance, then user experience is improved, but processor power consumption increases
Solution Approach 1:
The logic component performs self-service by autonomously monitoring processor state and selecting appropriate radio access technologies without requiring continuous high-level processor intervention. The system serves itself by making intelligent decisions based on processor state, reducing the energy burden on the main processor while maintaining optimized network operation and good user experience.
Solution Approach 2:
The invention changes the monitoring parameter from continuous network condition analysis to processor state-based selection. By using processor state (active vs. low-power) as the triggering parameter for technology selection, the system reduces monitoring overhead and power consumption compared to continuous network parameter analysis, while still achieving optimized user experience through appropriate technology selection.
4Loss of time
If the device uses voice-capable technology (WCDMA/GSM) to reduce call setup latency, then voice call performance is improved, but data transmission speed decreases
Solution Approach 1:
The system dynamically selects between voice-capable technologies (WCDMA/GSM) and high-speed data technology (LTE) based on real-time processor state. When the processor is active, LTE is used for maximum data speed; when the processor enters low-power state, the system switches to WCDMA or GSM for optimized voice call performance. This dynamic switching resolves the contradiction by allowing both optimization modes to operate at appropriate times.
Solution Approach 2:
The invention changes the operational parameter of radio access technology selection based on processor state. By using processor activity level as the controlling parameter, the system transitions between data-optimized mode (LTE when processor is active) and voice-optimized mode (WCDMA/GSM when processor is in low-power state), thereby achieving both high data speed and low voice call latency in different operational contexts.
Data Source
AI summary
Methods and apparatus for intelligently selecting and operating one or more air interfaces of a mobile wireless device for e.g., call setup time reduction. In one embodiment, operation of a high speed cellular interface is selectively adjusted or disabled or switched out when not required so as to minimize call setup times by, e.g., using a different cellular interface to receive pages. In one implementation, the wireless device includes a high-speed cellular interface, a lower-speed cellular interface, and a WLAN (e.g., Wi-Fi) interface.