QoS Flow Discard Timer for 5G Packet Deletion
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Solution Overview
Problem
The existing data packet deletion mechanisms in 5G networks, which rely on discard timers based on data radio bearers (DRBs), fail to meet the diverse service characteristics of different services, leading to inefficient storage management and packet handling.
Innovation Solution
Implementing a data packet deletion method that uses discard timers with a quality of service (QoS) flow granularity, allowing for customized timer settings based on specific QoS flows, enabling more precise control over packet retention and deletion according to service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a discard timer based on DRB granularity is used, then the storage space of the sender can be saved by deleting cached SDUs and PDUs, but the diverse service characteristics of different services cannot be met
Solution Approach 1:
The patent segments the discard timer control from DRB level to QoS flow level. Each QoS flow within a DRB can have its own discard timer configuration, allowing different services mapped to the same DRB to have different packet deletion behaviors. This segmentation resolves the contradiction by enabling fine-grained control that adapts to diverse service characteristics while still managing storage space effectively.
Solution Approach 2:
The patent applies local quality by allowing different discard timer parameters to be configured for different QoS flows. Each QoS flow can have customized discard timer values based on its specific service requirements, rather than applying a uniform timer to all flows in a DRB. This enables precise control over packet retention for each service type while maintaining overall storage management.
2Device complexity
If a uniform discard timer is applied to all data packets in a DRB, then the system complexity is reduced, but the data packet deleting demands of various services cannot be satisfied
Solution Approach 1:
The patent introduces segmentation by creating separate discard timer management for each QoS flow within a DRB. The PDCP entity maintains discard timer information per QoS flow, allowing independent control of packet deletion timing for different services. This segmentation increases adaptability while keeping the complexity manageable through structured organization of timer configurations.
Solution Approach 2:
The patent implements dynamic discard timer management where the discard timer value can be dynamically configured for each QoS flow based on service requirements. The system can adaptively adjust timer values for different QoS flows, enabling flexible response to varying service demands without requiring a completely different system architecture.
Data Source
AI summary
Embodiments of the present application provide a data packet deleting method, a device and a storage medium, the method includes: when a protocol layer entity of a sender receives an SDU from a higher layer, determining a QoS flow to which the SDU belongs; when the QoS flow to which the SDU belongs is a first QoS flow, the protocol layer entity starts a first discard timer, or the protocol layer entity selects a reference timer from the first discard timer and a second discard timer (a discard timer with DRB granularity), and starts the reference timer; when the first discard timer expires, or, when the reference timer expires, the protocol layer entity deletes the SDU and a PDU corresponding to the SDU.