Packet Filtering for Differentiated QoS Flow Routing
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Solution Overview
Problem
Existing network systems struggle to provide differentiated Quality of Service (QoS) guarantees for service data with varying requirements, such as video and non-IP data, as they cannot distinguish packet types accurately, leading to suboptimal service experiences.
Innovation Solution
Implementing a network device and terminal device capable of receiving packet filters and QoS flow identifiers to distinguish different packet types based on QoS information, enabling transmission through corresponding QoS flows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If IP multi-tuple is used to distinguish service data flows, then QoS flow transmission is achieved, but packet type distinction capability is insufficient for non-IP data and video data
Solution Approach 1:
The patent segments the packet filtering process into two stages: first filtering by IP multi-tuple (source address, destination address, source port, destination port, protocol type), then filtering by packet type (IP packet, Ethernet frame, other packet). This segmentation enables precise distinction of different packet types while maintaining QoS flow transmission capability.
Solution Approach 2:
The patent applies different filtering criteria to different packet types. For IP packets, it uses IP multi-tuple filtering; for Ethernet frames, it uses Ethernet frame filtering; for other packets, it uses other packet filtering. This local quality approach ensures that each packet type receives appropriate QoS treatment tailored to its specific characteristics.
2Device complexity
If all packets are transmitted through the same QoS flow, then device complexity is reduced, but service experience deteriorates due to lack of differentiated QoS guarantees
Solution Approach 1:
The patent dynamically determines the QoS flow for each packet based on its packet type and filtering results. Instead of using a fixed QoS flow for all packets, the system adapts the QoS flow selection based on real-time packet characteristics, enabling differentiated QoS guarantees while managing complexity through automated decision-making.
Solution Approach 2:
The patent changes the filtering parameters based on packet type. Different packet types trigger different filtering parameters (IP multi-tuple for IP packets, Ethernet frame fields for Ethernet frames, other parameters for other packets). This parameter change approach enables differentiated QoS management without requiring separate complex systems for each packet type.
3Measurement precision
If packet filters include detailed QoS type information, then QoS management precision is improved, but information processing complexity increases
Solution Approach 1:
The patent performs preliminary packet type identification before QoS flow selection. By first determining whether a packet is an IP packet, Ethernet frame, or other packet type, and pre-configuring the corresponding filtering parameters, the system reduces the complexity of real-time processing while maintaining high precision in QoS type identification.
Data Source
AI summary
Network devices and a terminal device are provided in implementations of the disclosure. The network device includes a transceiver, a processor, and a memory configured to storing a computer program, where the computer program is executable by the processor to cause the network device to receive, from a second network function (NF) element, a packet filter and a quality of service (QoS) flow identifier (QFI) of at least one packet, where the packet filter comprises information related to at least one QoS type of the at least one packet; and distinguish different types of packets according to the packet filter, and transmit the different types of packets through corresponding QoS flows to a second network device.