SDN Controller Latency Discovery Dynamic Network Selection
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Solution Overview
Problem
Advanced wireless communication networks, such as 5G and 6G, face challenges in dynamically selecting the most suitable access technology and routing to meet varying application requirements, particularly in scenarios where latency and service quality are critical, due to the lack of real-time latency measurement and dynamic network adaptation capabilities.
Innovation Solution
The implementation of a system that uses enhanced ICMP traceroute messages with timestamp fields to measure end-to-end latency across different access technologies, allowing a Software-Defined Network (SDN) controller to dynamically select the most appropriate radio access technology and routing based on latency thresholds and application requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional network selection methods are used without real-time latency measurement, then device complexity is reduced, but network performance and service quality deteriorate due to inability to dynamically adapt to varying application requirements
Solution Approach 1:
The patent introduces an SDN controller as an intermediary component that centralizes the latency measurement and network selection logic. The controller receives latency data from multiple access technologies, processes this information, and makes intelligent routing decisions. This mediator approach improves network performance through real-time adaptation while keeping end devices relatively simple, as the complexity is shifted to the network controller rather than being distributed across all devices.
Solution Approach 2:
The patent implements a feedback mechanism where latency measurements from various access technologies are continuously collected and fed back to the SDN controller. The controller uses this feedback information to dynamically adjust routing decisions and select the most appropriate access technology for each application. This closed-loop feedback system enables real-time network optimization without requiring complex decision-making logic in end devices.
2Adaptability or versatility
If multiple access technologies are monitored with real-time latency measurement, then adaptability to different application requirements is improved, but measurement and detection difficulty increases
Solution Approach 1:
The patent employs preliminary action by pre-configuring traceroute echo packets with timestamp fields before transmission. The SDN controller prepares measurement packets in advance with appropriate timing information, which are then sent through multiple access technologies. This preliminary preparation simplifies the measurement process by establishing a standardized method for latency detection across different technologies, reducing the complexity of real-time measurement and comparison.
Solution Approach 2:
The patent uses copying by transmitting identical traceroute echo packets through multiple access technologies simultaneously. The same measurement packet is replicated and sent over different networks (e.g., 5G, LTE, Wi-Fi), allowing direct comparison of latency performance. This copying approach enables consistent measurement across diverse technologies while maintaining measurement precision through standardized packet formats and timestamping mechanisms.
3Productivity
If dynamic network selection based on latency thresholds is implemented, then productivity and resource utilization are improved, but loss of time for latency measurement and processing occurs
Solution Approach 1:
The patent implements periodic action by scheduling latency measurements at regular intervals rather than continuously. The SDN controller periodically sends traceroute echo packets through monitored access technologies and updates routing decisions based on these periodic measurements. This periodic approach balances productivity improvement through dynamic network selection with time loss minimization, as measurements are frequent enough to capture network conditions but not so frequent as to create excessive overhead.
Solution Approach 2:
The patent applies partial action by monitoring only the most critical latency parameters and key access technologies rather than进行全面 measurement of all network metrics. The SDN controller focuses on essential latency thresholds and selects from a limited set of pre-identified access technologies, reducing measurement and processing time while still achieving effective dynamic network selection for latency-sensitive applications.
Data Source
AI summary
Facilitating automatic latency discovery and dynamic network selection using data analytics in advanced networks (e.g., 4G, 5G, 6G, and beyond) is provided herein. Operations of a method can comprise inserting, by a system comprising a processor, first information indicative of a first identified time into a first field of a message. Also, the method can comprise transmitting, by the system, the message to a defined device. Further, the method can comprise determining, by the system, an end-to-end latency for the message based on a response received from the defined device in reply to the message. The response can comprise second information indicative of a second identified time that the message was received at the defined device.