Software defined wide area network bandwidth allocation method for ensuring transmission deadline and Rabin fairness

Abstract

The invention discloses a software-defined wide area network bandwidth allocation method for ensuring transmission deadline and Rabin fairness. The method comprises the following steps: recording to-be-transmitted data transmission requests in each time period into a set; sensing a bottom layer network topology through a controller of a software defined network control plane, and calculating a path set from each source network device to a target network device; initializing a deep reinforcement learning network for each data transmission request, performing iteration on the deep reinforcement learning network corresponding to each data transmission request at the same time, evaluating a transmission income size corresponding to a bandwidth allocation scheme in an iteration process, calculating a loss function of a training actor network and a training circling network according to the income size, and calculating the loss function of the training actor network and the loss function of the training circling network; parameters of the training actor network and the training circling network are adjusted to enable the loss function to meet requirements, and then final parameters of the target actor network and the target circling network are obtained; and finally, a final bandwidth allocation scheme is given by the target actor network.

Description

technical field [0001] The invention belongs to the technical field of network communication, and in particular relates to a software-defined wide area network bandwidth allocation method for ensuring transmission deadline and Rabin fairness. Background technique [0002] First of all, some professional terms involved in the present invention are introduced: [0003] Wide Area Network (WideArea Network, WAN): It is a long-range network that connects local area networks or metropolitan area networks in different regions for computer communication. Usually spans a large physical range, covering a range from tens of kilometers to thousands of kilometers, it can connect multiple regions, cities and countries, or span several continents and provide long-distance communication, forming an international remote network. [0004] Software Defined Wide Area Networking (SD-WAN): It is a service formed by applying software-defined network technology to WAN scenarios, which is speciall...

AI Technical Summary

Problems solved by technology

However, the fairness of network bandwidth allocation is also a high-profile issue in the process of WAN traffic scheduling

Once the fairness of bandwidth allocation is ignored in the process of traffic scheduling, it will cause serious service interference, greatly reduce application performance and cause serious economic losses to users, and will also greatly affect brand influence and word of mouth

However, on the one hand, because the current traffic scheduling methods for network transmission deadlines often use "deterministic" traffic scheduling methods, bandwidth resources are concentrated on certain data transmission requests in order to ensure transmission deadlines, resulting in unfair use of bandwidth

On the other hand, fairness-guaranteed traffic scheduling methods need to distribute bandwidth evenly among data transfer requests, causing these data transfer requests to miss deadlines because there is not enough bandwidth

This makes it difficult to balance the two indicators of transmission deadline and fairness, and even contradict each other

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