Tune-Away Management in Wireless Voice Communication
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Solution Overview
Problem
Wireless communication systems face challenges in managing tune-aways during voice frame transmission, leading to potential interruptions and inefficiencies due to unpredictable changes in network resources and vocoder rates.
Innovation Solution
User equipment determines a predicted tune-away for a set of voice frames and adjusts the vocoder rate from a first rate to a second, lower rate, or drops a subset of packets during the predicted tune-away period to maintain service quality and adapt to resource availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vocoder rate is maintained at a high first vocoder rate during voice frame transmission, then the voice quality is improved, but interruptions occur when tune-aways are performed to monitor other wireless communication systems
Solution Approach 1:
The system performs preliminary detection of tune-away events and proactively adjusts the vocoder rate before the actual tune-away occurs. By predicting when a tune-away will happen based on monitoring configurations, the system prepares by switching to a second vocoder rate in advance, ensuring that voice frame transmission can continue without interruption during the upcoming tune-away period.
2Productivity
If the vocoder rate is reduced to a second vocoder rate in anticipation of tune-aways, then transmission continuity is maintained, but voice quality deteriorates
Solution Approach 1:
The system implements periodic monitoring of tune-away events based on configured monitoring parameters, allowing it to alternately switch between first and second vocoder rates depending on whether a tune-away is detected. During normal operation without tune-aways, the system uses the higher first vocoder rate for better voice quality. When a tune-away is detected or predicted, it switches to the second vocoder rate to maintain continuity, then returns to the first rate afterward.
3Loss of energy
If packets are dropped during predicted tune-away periods, then resource utilization is optimized, but data loss increases
Solution Approach 1:
The system changes the vocoder rate parameter dynamically based on the detected tune-away conditions. Instead of dropping packets, it adjusts the vocoder rate from the first rate to the second rate, which is configured to work with the reduced resource availability during tune-away periods. This parameter change allows the system to adapt to varying network conditions without losing data, maintaining continuous transmission at an adjusted quality level.
Data Source
AI summary
Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine a predicted tune-away for a set of voice frames. In some aspects, the user equipment may alter a vocoder rate from a first vocoder rate to a second vocoder rate that is less than the first vocoder rate based at least in part on determining the predicted tune-away for the set of voice frames. In some aspects, the user equipment may drop, in connection with an occurrence of the predicted tune-away, a subset of packets for a time period corresponding to the predicted tune-away. Numerous other aspects are provided.