Dynamic Vocoder Selection for Wireless Voice Protocol Adaptation
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Solution Overview
Problem
Wireless devices optimized for voice communications using one cellular protocol often perform suboptimally when switching to a different protocol, leading to inefficiencies in voice communication across various cellular networks.
Innovation Solution
A method for controlling vocoder selection in wireless devices, which involves detecting changes in cellular protocols, identifying and switching to vocoders optimized for the new protocol, and receiving instructions from wireless carrier systems to ensure optimal voice communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wireless device is optimized for voice communications using one cellular protocol, then voice communication performance on that protocol is improved, but voice communication performance on other cellular protocols deteriorates
Solution Approach 1:
The patent implements dynamic vocoder selection that automatically adapts to different cellular protocols in use. The system monitors which cellular protocol is currently being used and dynamically switches between different vocoders (e.g., AMR-WB for wideband, AMR-NB for narrowband, EVS for enhanced voice services) to optimize voice communication performance for each specific protocol, thereby resolving the contradiction between optimization for one protocol and adaptability to multiple protocols
Solution Approach 2:
The system changes the operational parameters by selecting different vocoders based on the detected cellular protocol. Each vocoder is specifically optimized for certain protocol characteristics (bandwidth, bit rate, coding scheme), and the system adjusts the vocoder parameter selection in real-time according to the active protocol, enabling optimal performance across multiple protocols without sacrificing adaptability
2Adaptability or versatility
If a wireless device switches between different cellular protocols, then network flexibility and coverage are improved, but voice communication efficiency deteriorates due to suboptimal vocoder performance
Solution Approach 1:
The system employs feedback mechanisms where the wireless device continuously monitors the active cellular protocol and feeds this information back to the vocoder selection logic. Based on this feedback, the system automatically selects the most appropriate vocoder for the current protocol, ensuring that voice communication efficiency is maintained even as the device switches between different cellular protocols for network flexibility and coverage
3Device complexity
If a wireless device uses a single vocoder optimized for one protocol, then device complexity is reduced, but performance across multiple protocols deteriorates
Solution Approach 1:
The patent implements a universal vocoder selection mechanism that manages multiple vocoders within a single device. The system maintains a library of different vocoders (AMR-WB, AMR-NB, EVS, etc.) and uses a centralized selection logic that determines which vocoder to activate based on the current cellular protocol. This multi-functional approach allows the device to support multiple protocols with high performance while managing complexity through unified control rather than requiring separate optimization for each protocol
Data Source
AI summary
A method of controlling a vocoder selection of a wireless device that uses cellular protocols includes wirelessly receiving an instruction at the wireless device from a wireless carrier system, wherein the instruction includes a vocoder identity that is associated with a particular cellular protocol; identifying a vocoder currently in use at the wireless device; and changing the vocoder currently in use at the wireless device if the identified vocoder is different than the vocoder identity included in the instruction.