PDCP SDU Timer Grouping for Efficient Air Interface Transmission
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Solution Overview
Problem
In communication systems, particularly for services like extended reality (XR) and cloud gaming, the inefficiency of air interface resources occurs due to PDCP SDUs being transmitted despite their discard timers expiring, leading to resource waste and delayed transmission.
Innovation Solution
A method and apparatus that determine a PDCP SDU group with varying discard timer lengths based on the arrival times of individual SDUs, ensuring timely transmission and resource utilization by aligning timeout points across multiple SDUs in a data frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single PDCP discard timer length is configured for all PDCP SDUs, then the configuration is simple, but transmission efficiency deteriorates when SDUs arrive at different times
Solution Approach 1:
The patent segments PDCP SDUs into different groups based on their arrival times at the PDCP layer. Each group is assigned a specific discard timer length, allowing differentiated timer management. This segmentation resolves the contradiction by enabling efficient transmission handling for multiple arrival scenarios while maintaining manageable configuration complexity through group-based classification.
Solution Approach 2:
The patent applies local quality by assigning different discard timer lengths to different PDCP SDU groups based on their specific arrival characteristics. SDUs arriving within a first time window receive one timer length, while those arriving in a second time window receive another. This localized differentiation optimizes transmission efficiency for each arrival scenario without requiring complete reconfiguration of the system.
2Loss of time
If PDCP discard timer is started for each PDCP SDU individually, then transmission timing can be optimized, but resource waste occurs when some SDUs timeout while others are still being transmitted
Solution Approach 1:
The patent merges the transmission handling of PDCP SDUs within the same group by applying a unified discard timer length to all SDUs in that group. This merging approach ensures that SDUs with similar arrival characteristics are transmitted together, preventing resource waste from partial timeouts while maintaining optimized timing. The group-based merging resolves the contradiction by coordinating transmission across multiple SDUs.
Solution Approach 2:
The patent performs preliminary classification of PDCP SDUs into different groups based on their arrival times before transmission. By determining the appropriate discard timer length in advance for each group, the system prepares optimized transmission parameters beforehand. This preliminary action prevents resource waste by ensuring that SDUs are transmitted with appropriate timing parameters before the transmission process begins.
3Productivity
If different PDCP discard timer lengths are maintained for multiple PDCP SDUs, then transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent introduces dynamic timer management by determining discard timer lengths based on the arrival time characteristics of PDCP SDUs. The system dynamically selects appropriate timer lengths from different groups depending on when SDUs arrive at the PDCP layer. This dynamic approach improves transmission efficiency by adapting timer parameters to actual arrival patterns while managing complexity through predefined groups rather than completely individualized timer management.
Solution Approach 2:
The patent changes the discard timer parameter based on the arrival time characteristics of PDCP SDUs. By defining multiple discard timer length options and selecting appropriate ones based on arrival time windows, the system optimizes transmission efficiency through parameter differentiation. The parameter changes are managed systematically through group-based classification, preventing uncontrolled complexity increase.
Data Source
AI summary
The present disclosure provides a timer processing method, an apparatus and a storage medium. On a terminal side, the method includes: determining a PDCP SDU group, where the terminal maintains different PDCP discard timer lengths for multiple PDCP SDUs in the PDCP SDU group. Therefore, it is beneficial for realizing the effective transmission of multiple PDCP SDUs in the PDCP SDU group, and realizing the effective transmission of multiple IP packets in a data frame, thereby improving the air interface resource efficiency while ensuring the packet delay requirement.