PDCP Discard Timer Tuning for Voice and Silent Frame Transmission
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Solution Overview
Problem
The PDCP discard timer duration configured by a network device may be improper, leading to issues such as lag or one-way audio, degrading user experience due to mismatched requirements of various service types and use scenarios.
Innovation Solution
A terminal device dynamically adjusts the PDCP discard timer duration by reconfiguring it based on specific service types and scenarios, using identifiers to differentiate frame types and looking up preset relationship tables for optimal durations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the PDCP discard timer duration is configured by the network device, then the network device can control the data transmission timing, but the terminal device cannot adapt to different service type requirements, leading to lag or one-way audio issues
Solution Approach 1:
The patent implements dynamic adjustment of the PDCP discard timer duration by the terminal device based on service type identification. The terminal device dynamically selects between a first duration (for first service types) and a second duration (for second service types), allowing the system to adapt to different service requirements while maintaining reliable data transmission through appropriate timer configuration for each service type.
Solution Approach 2:
The patent changes the PDCP discard timer duration parameter based on the identified service type. When a first service type is identified, the terminal device uses a first duration; when a second service type is identified, it uses a second duration. This parameter adjustment resolves the contradiction by making the system adaptable to different service types while ensuring each service type uses an appropriate timer duration for reliable transmission.
2Adaptability or versatility
If a fixed PDCP discard timer duration is used for all service types, then the configuration is simple, but it cannot meet the different requirements of various service types and use scenarios
Solution Approach 1:
The patent segments service types into at least two categories: first service types and second service types. Each segment is associated with a different PDCP discard timer duration (first duration and second duration respectively). The terminal device identifies the service type and applies the corresponding timer duration, achieving adaptability to different service types through segmentation while keeping the processing logic relatively simple through clear categorization.
3Reliability
If the PDCP discard timer duration is extended to prevent cache overflow, then data loss is reduced, but transmission lag increases degrading user experience
Solution Approach 1:
The patent adjusts the PDCP discard timer duration parameter based on service type requirements. For first service types, a first duration is used that balances cache retention with timely transmission; for second service types, a second duration is used that prevents excessive lag. This parameter adaptation resolves the contradiction by ensuring each service type uses an appropriate timer duration that maintains reliability without causing unacceptable transmission lag.
Data Source
AI summary
A data transmission method, a device, and a storage medium are provided, related to the field of communication technologies. In the embodiments, after a terminal device receives a packet data convergence protocol (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.