PNF SDN Controller Packet Processing for VNF IP Assignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The complexity of network devices increases due to the need for customization to handle different formats of access loop identifiers for user equipment across various operators, leading to increased complexity and load in processing DHCP requests for IP address assignment.
Innovation Solution
A data transmission method involving a physical network function software-defined networking (PNF SDN) controller and a virtualized network function software-defined networking (VNF SDN) controller, where the PNF SDN controller processes the access loop identifier and the first packet to generate a second packet, which is then sent directly to the VNF SDN controller, bypassing the need for intermediate network devices, thereby simplifying the access device's role and improving data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If network devices are customized to handle different formats of access loop identifiers for different operators, then the adaptability to different operators is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the access loop identifier processing function from the network device and places it in the SDN controller. The network device only needs to send the first packet and access loop identifier to the SDN controller, which then processes them to generate the second packet. This separation reduces network device complexity while maintaining adaptability through the SDN controller's software-based processing capabilities.
2Adaptability or versatility
If intermediate network devices are used to forward packets between PNF SDN controller and VNF SDN controller, then the network routing flexibility is improved, but the data transmission efficiency deteriorates
Solution Approach 1:
The patent introduces an interface as a direct intermediary between the PNF SDN controller and VNF SDN controller, eliminating the need for intermediate network devices in the control plane communication path. This direct interface enables efficient packet forwarding while maintaining the flexibility of SDN-based routing control, resolving the contradiction between routing flexibility and transmission efficiency.
Data Source
AI summary
A data transmission method includes: receiving, by the PNF SDN controller, a first packet and an access loop identifier that are sent by a first network device; generating, by the PNF SDN controller, a second packet based on the access loop identifier and the first packet; and sending, by the PNF SDN controller, the second packet to the virtualized network function software-defined networking VNF SDN controller, so that the VNF SDN controller sends the second packet to a second network device, where the second packet is used to request the second network device to assign an IP address or IP address prefix to user equipment.