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Fog network task unloading method based on SDN

A task and network technology, applied in the field of mobile communication, can solve problems such as congestion delay, lack of network resources and load, monitoring, etc., and achieve the effect of minimizing task offloading delay, optimizing task offloading decision, and improving transmission experience.

Active Publication Date: 2019-09-13
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] However, in the fog network, the existing unloading scheme lacks the monitoring of the overall network resources and loads, resulting in a large amount of time delay due to network congestion. Aiming at the above phenomena, the present invention proposes an SDN-based fog network task offloading method

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  • Fog network task unloading method based on SDN
  • Fog network task unloading method based on SDN
  • Fog network task unloading method based on SDN

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Embodiment Construction

[0031] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] see figure 1 , figure 1 Shown is the scene model diagram of SDN-based fog network task offloading calculation. The network consists of user layer, SDN controller layer and fog node layer, and users are randomly distributed in the network. After the user task arrives, it sends an offload request to the SDN, and the SDN calculates the offload delay based on the task-related demand information and the remaining energy consumption and computing resources of the FN, and makes an optimal offload decision.

[0033] Assuming that at time t, the SDN controller receives N task packet offload requests from user k, the SDN controller first sends an offload command to FNi and reports the remaining processing capacity ratio request. FNi updates historical average energy consumption and the remaining computing capacity at time t, and report th...

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Abstract

The invention relates to a fog network task unloading method based on SDN, and belongs to the technical field of mobile communication. Firstly, aiming at task unloading strategies of fog nodes under different conditions, a dynamic service node updating mode is adopted to establish a volunteer node set, so that the task unloading efficiency is improved. Secondly, in order to solve the problem of network congestion, an SDN technology is introduced, the network load is monitored in real time through an SDN controller in the network information resource interaction process, and the network congestion is effectively reduced. Besides, in order to improve the utilization rate of network resources, the method is based on a Lyapunov optimization algorithm, the condition of a node queue is fully considered, and a task unloading cost minimization problem is decomposed into an optimal transmission power distribution sub-problem and an optimal unloading scheme sub-problem for solving. According tothe invention, the total time delay and energy consumption cost of the system can be reduced, and stable and effective resource allocation of the task queue is realized.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and relates to an SDN-based fog network task offloading method. Background technique [0002] With the development of the Internet of Things (IoT) technology, a huge number of devices with limited resources will be connected to the future network. Due to the limited computing power of these nodes, for the current new applications, the tasks of most terminal devices need to be offloaded. Obtain satisfactory delay performance, such as self-driving cars, smart home devices, electronic medical care, smart manufacturing, etc. In traditional networks, these tasks are usually offloaded to the cloud center, thereby avoiding the problems of long processing delays and insufficient resources of local terminal devices. However, the explosive growth of mobile data in 5G / IoT will bring a heavy network burden to cloud servers and all wireless links, so the performance of the entire system will dro...

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Application Information

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IPC IPC(8): H04W24/02H04L29/08
CPCH04W24/02H04L67/1029H04L67/1008H04L67/60Y02D30/70
Inventor 黄晓舸樊伟伟许可陈前斌
Owner CHONGQING UNIV OF POSTS & TELECOMM
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