SDF-Level QoS Control via SMF Homogeneity
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Solution Overview
Problem
In wireless networks, the existing QoS control methods for uplink and downlink data packets on terminal and network sides often result in packet loss due to different mapping rules used on each side, leading to mismatches in QoS flows.
Innovation Solution
A QoS control method and device that involve a session management function (SMF) entity obtaining SDF-level QoS control information and sending it to both the terminal and the user plane function (UPF) entity, ensuring that both entities perform QoS control based on the same information to avoid packet loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different mapping rules are used on terminal side and network side for QoS control, then the QoS control can be independently optimized on each side, but packet loss occurs due to mismatch in QoS flows
Solution Approach 1:
The patent applies homogeneity by ensuring that both the terminal side and network side use the same SDF-level QoS control information and follow identical mapping rules. The SMF entity generates unified QoS control information that is distributed to both sides, making their QoS control processes homogeneous rather than different, thereby eliminating the packet loss caused by mismatches while preserving the ability to adapt to different services through the SDF-level control mechanism.
2Reliability
If SDF-level QoS control information is distributed to both terminal and network side, then consistent QoS control is achieved, but the system complexity increases
Solution Approach 1:
The SMF entity serves as an intermediary that generates SDF-level QoS control information and distributes it to both the terminal and network side. This intermediary approach centralizes the complexity of QoS rule generation and management in the SMF, while the terminal and network side simply execute the received control information, thereby achieving consistent QoS control without significantly increasing the complexity of individual components.
Solution Approach 2:
The patent uses copying by having the SMF entity create a standardized QoS control information structure that is replicated and distributed to multiple entities (terminal and network side). This copying approach ensures all parties receive identical control information without requiring each entity to independently process complex QoS rules, reducing overall system complexity while maintaining consistency.
Data Source
AI summary
A quality of service (QoS) control method and a device, where the method includes: a session management function (SMF) entity obtaining service data flow (SDF)-level QoS control information; the SMF entity sending the SDF-level QoS control information to a terminal; and the terminal performing QoS control on an uplink data packet based on the SDF-level QoS control information, or the terminal deleting the SDF-level QoS control information. The terminal can perform the QoS control on the uplink data packet based on the SDF-level QoS control information.