Different-Duration PDU Set Transmission for Real-Time Media
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Solution Overview
Problem
Existing communication systems face challenges in ensuring the transmission of protocol data units (PDU sets) for real-time media services like VR, AR, and cloud gaming, as the loss or damage of a PDU set affects the decoding and display of subsequent sets, leading to degraded user experience.
Innovation Solution
The method involves transmitting different PDU sets of the same service using distinct durations, with key PDU sets like I frames receiving longer transmission times and non-key PDU sets like P frames receiving shorter times, and allowing transmission beyond the initial delay budget to ensure successful delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform transmission duration is used for all PDU sets, then transmission simplicity is maintained, but transmission reliability of key PDU sets deteriorates
Solution Approach 1:
The patent applies local quality by assigning different transmission durations to different PDU sets based on their importance. Key PDU sets (e.g., I-frames) are assigned longer transmission durations to ensure reliable delivery, while non-key PDU sets (e.g., P-frames) use shorter durations. This differentiated approach ensures that critical data receives enhanced transmission reliability without unnecessarily extending the transmission time for all PDU sets, thus resolving the contradiction between reliability and complexity.
Solution Approach 2:
The patent changes the transmission duration parameter dynamically based on the type and importance of each PDU set. By adjusting this key parameter, the system can prioritize transmission of key PDU sets with longer durations while maintaining efficiency for non-key sets. This parameter-based differentiation directly addresses the contradiction by allowing reliability to be improved for critical data without uniformly increasing complexity across all transmissions.
2Reliability
If transmission duration is extended beyond delay budget, then transmission reliability improves, but time efficiency deteriorates
Solution Approach 1:
The patent applies local quality by extending transmission duration beyond the delay budget only for key PDU sets that require high reliability. Non-key PDU sets continue to use the standard delay budget, avoiding unnecessary time loss. This localized extension of transmission time ensures that reliability is improved where critical, while time efficiency is maintained for less critical data transmissions.
Solution Approach 2:
The patent dynamically adjusts the transmission duration parameter based on PDU set importance. For key PDU sets, the duration parameter is extended beyond the standard delay budget to ensure successful delivery. For non-key PDU sets, the parameter remains at the standard delay budget, preventing time loss. This selective parameter adjustment resolves the contradiction between reliability and time efficiency.
3Reliability
If retransmission attempts are increased, then transmission reliability improves, but resource consumption increases
Solution Approach 1:
The patent applies local quality by allocating different retransmission resources to different PDU sets based on their importance. Key PDU sets receive enhanced retransmission attempts and resources to ensure successful decoding, while non-key PDU sets use standard retransmission limits. This localized resource allocation ensures that decoding success rate is improved for critical data without unnecessarily consuming resources for all PDU sets.
Solution Approach 2:
The patent changes the retransmission parameter (maximum number of attempts, resource allocation) based on PDU set type. For key PDU sets, the retransmission parameters are adjusted to allow more attempts and allocate more resources, improving decoding success rate. For non-key PDU sets, standard parameters are maintained, avoiding excessive resource consumption. This parameter differentiation resolves the contradiction between reliability and resource consumption.
Data Source
AI summary
A data transmission method and a communication apparatus. An access network device receives a PDU set of a service used on a terminal, where the PDU set includes a first PDU set and a second PDU set, and a service to which the first PDU set belongs is the same as a service to which the second PDU set belongs. The access network device sends the first PDU set to the terminal within first duration, and sends the second PDU set to the terminal within second duration, where the first duration is different from the second duration. The access network device is able to use different transmission duration for different PDU sets.