Base Station Voice Quality Compensation via Packet Loss Detection
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Solution Overview
Problem
In mobile communication networks, particularly in VoLTE services, packet loss during voice calls can lead to voice quality deterioration due to the lack of Hybrid Automatic Retransmit Request (HARQ) and buffering operations in the RLC Unacknowledged Mode, resulting in jitter and Mean Opinion Score (MOS) degradation.
Innovation Solution
A method and device that utilize Real-time Transport Protocol (RTP) packets, where a base station detects packet loss by sequence numbers and generates comfort noise packets or packet loss indication information to compensate for lost packets, preventing voice quality deterioration by maintaining call continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If RLC Unacknowledged Mode is used for voice packet transmission, then transmission speed is improved, but voice quality deteriorates due to packet loss
Solution Approach 1:
The base station acts as an intermediary by generating comfort noise packets to substitute for lost voice packets. When packet loss is detected through sequence number verification, the base station creates artificial comfort noise packets that mask the missing voice data, preventing audible gaps and maintaining voice quality despite the high-speed unacknowledged transmission mode.
2Device complexity
If HARQ and buffering operations are disabled, then device complexity is reduced, but packet loss increases causing voice quality deterioration
Solution Approach 1:
The patent extracts the error correction function from the terminal device and relocates it to the base station. By removing HARQ and buffering operations from the terminal, device complexity is reduced. The base station compensates by implementing packet loss detection and comfort noise generation, centralizing the reliability maintenance function at the network side rather than requiring complex terminal-side error correction mechanisms.
3Reliability
If packet loss compensation is implemented, then voice quality is improved, but processing time increases
Solution Approach 1:
The base station performs preliminary packet loss detection by verifying sequence numbers of received voice packets before forwarding them to the terminal. When loss is detected, comfort noise packets are generated and substituted in real-time, allowing immediate compensation without requiring post-processing or retrospective analysis, thus minimizing processing time delays.
Data Source
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AI summary
An embodiment of the present invention may provide a method and a device for improving voice quality in a mobile communication network. An embodiment of the present invention may provide a method for improving communication quality by a base station and a device using the same, the method comprising the steps of receiving, from a terminal, at least one internet protocol (IP)-based voice packet; determining whether a packet loss exists, on the basis of the received packet; generating compensation information corresponding to a lost packet when it is determined that a packet loss exists; and transmitting the compensation information.