PDCP Discard Timer Mapping for Voice and Silent Frame Transmission
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Solution Overview
Problem
The PDCP discard timer duration configured by network devices is often improper, leading to issues such as lag or one-way audio, degrading user experience due to mismatched requirements for different service types and scenarios.
Innovation Solution
The terminal device dynamically adjusts the PDCP discard timer duration based on received RRC messages, allowing for different durations for various service types and scenarios by configuring appropriate timer durations for different types of data frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PDCP discard timer duration is configured by the network device, then the network can control resource management, but the timer duration may be improper leading to lag or one-way audio
Solution Approach 1:
The patent implements dynamic adjustment of the PDCP discard timer duration by introducing a mapping relationship between QoS parameters and timer durations. The terminal device selects appropriate timer durations based on the QoS flow identifier and 5QI values, enabling the system to adapt to different service types and scenarios rather than using a fixed network-configured timer value.
Solution Approach 2:
The patent changes the timer duration parameter based on QoS parameters. By establishing a mapping relationship between 5QI values and PDCP discard timer durations, the system can dynamically adjust the timer parameter to match different service requirements, resolving the contradiction between network control and service adaptability.
2Adaptability or versatility
If a fixed PDCP discard timer duration is used, then the system is simple to implement, but it cannot meet requirements of various service types
Solution Approach 1:
The patent applies preliminary action by pre-establishing a mapping relationship between QoS parameters (5QI values) and PDCP discard timer durations. This mapping table is prepared in advance, allowing the terminal device to quickly select appropriate timer durations without complex real-time calculations, thus maintaining simplicity while achieving service-type adaptability.
3Reliability
If the PDCP discard timer duration is extended, then data transmission reliability is improved, but transmission latency increases causing lag
Solution Approach 1:
The patent dynamically changes the PDCP discard timer duration parameter based on service requirements. For delay-sensitive services like voice calls, shorter timer durations are selected to reduce latency, while for reliability-critical services, longer durations are chosen. This parameter adaptation resolves the contradiction between reliability and latency.
Data Source
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AI summary
This application provides a data transmission method, a device, and a storage medium, and relates to the field of communication technologies. In this solution, after a terminal device receives a PDCP discard timer duration configured by a network device for a voice data radio bearer, the terminal device may configure a relatively short PDCP discard timer duration for a silent frame and a relatively long PDCP discard timer duration for a voice frame through QCI/5QI-based table lookup. Compared with the silent frame, the voice frame carries more useful information. Therefore, after the silent frame expires, the silent frame is discarded to release a channel resource, so that the voice frame located after the silent frame can be smoothly transmitted, to effectively meet requirements of different service types for the PDCP discard timer duration and improve user experience.