Logical-Path Queue Weighting for Low-Delay Network Slice Transfer

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Solution Overview

Problem

Existing queue management techniques in network slices fail to appropriately manage queues according to network requirements, leading to queuing delays that cannot satisfy 5G network demands.

Innovation Solution

A transfer device that distributes packets to queues based on logical paths, sets weights according to queue occupancy, and selects output queues based on these weights to manage queues effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single queue is used with FIFO method, then the device complexity is reduced, but the queuing delay increases and network requirements cannot be satisfied

Engineering Contradiction:
Improvequeue management complexityVSAvoidqueuing delay
Core Design Contradiction:
Device complexityVSLoss of time

Solution Approach 1:

The patent segments the single queue into multiple queues corresponding to different network slices. Each queue is managed independently with its own weighting, allowing packets from different network slices to be transmitted according to their specific requirements rather than being processed in a single FIFO sequence, thereby reducing queuing delay for time-sensitive traffic.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic weight adjustment for each queue based on real-time packet amounts and network requirements. The weighting is not static but can be adjusted dynamically to prioritize queues with higher urgency or more packets, enabling the system to adapt to changing network conditions and reduce overall queuing delay.

Inventive Principle:
Principle #15Dynamics

2Loss of time

If multiple queues are provided with band control, then the queuing delay is reduced for different network requirements, but the device complexity increases

Engineering Contradiction:
Improvequeuing delayVSAvoidqueue management complexity
Core Design Contradiction:
Loss of timeVSDevice complexity

Solution Approach 1:

The patent employs feedback mechanisms where the system continuously monitors the packet amount in each queue and uses this information to dynamically adjust the weighting of queues. This feedback loop allows the system to automatically balance the load across queues and prioritize traffic based on current network conditions, reducing the need for complex manual configuration while managing multiple queues effectively.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The queue management system performs self-adjustment by automatically calculating weights based on packet amounts and network slice requirements. Rather than requiring external intervention or complex centralized control, each queue's priority is determined autonomously based on its current state and the defined network requirements, simplifying the overall management complexity.

Inventive Principle:
Principle #25Self-service

3Reliability

If DiffServ is used for QoS control, then the QoS is improved for specific traffic classes, but it cannot be applied to network slices because the option area of IP packet is used

Engineering Contradiction:
ImproveQoSVSAvoidapplicability to network slices
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent moves the QoS differentiation from the IP packet header dimension (DSCP values) to the queue dimension. Instead of marking packets with DSCP values and relying on router support, the patent classifies packets into different queues based on network slice identifiers and applies weighting at the queue level. This dimensional shift allows QoS control to work with standard IP packets without requiring option area usage or special router capabilities.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20250358237A1Transfer device, transfer method, and transfer program
Publication Date: 2025.11.20 NT T INC
  • US20250358237A1 patent drawing
  • US20250358237A1 patent drawing
  • US20250358237A1 patent drawing

AI summary

A transfer device (10) distributes a received packet to each of queues provided in units of logical paths. In addition, the transfer device (10) sets a weight of each of the queues according to an amount of packets in each of the queues provided in units of logical paths, and selects a queue for outputting a packet according to the set weight. Further, the transfer device (10) outputs a packet from the selected queue.