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A priority-driven handover optimization method under wireless SDN

An optimization method and priority technology, applied in wireless communications, data exchange networks, digital transmission systems, etc., can solve the problems of large granularity of business traffic division, not fully considering the differences in bandwidth requirements of different traffic, and achieve resource consistency optimization. , the effect of shortening the duration and high application value

Active Publication Date: 2021-10-19
GUANGDONG UNIV OF TECH
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Problems solved by technology

This solution allocates the bandwidth in time through the scheduling strategy, which reduces the impact of other services on services with high delay sensitivity. However, the division of service traffic is relatively granular, and the difference in bandwidth requirements for different traffic is not fully considered. , when the user is in the wireless handover scenario, it will cause resource allocation problems before and after the wireless handover

Method used

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  • A priority-driven handover optimization method under wireless SDN
  • A priority-driven handover optimization method under wireless SDN
  • A priority-driven handover optimization method under wireless SDN

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Embodiment Construction

[0051] A priority-driven handover optimization method under wireless SDN, comprising the following steps:

[0052] Step 1, establish a wireless SDN network

[0053] The present invention adopts an SDN controller, a plurality of OVS (Open vSwitch) switches and a plurality of wireless APs (AccePoint, wireless access point), and forms a wireless SDN network through a three-level connection mode.

[0054] Such as figure 1 As shown, in this embodiment, a dense commercial district is taken as an example. In order to simplify the topology, the SDN controller adopts a Ryu centralized single controller. When the network scale is large, a single controller is prone to node failure and other problems, which will affect the reliability of the network. In this case, multiple controllers, such as OpenDaylight, can be used to control the network. For the Ryu controller, the ZooKeeper service can be used to realize the interaction between multiple controllers; the business district administ...

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Abstract

The invention discloses a priority-driven switching optimization method under wireless SDN. The method proposes a priority-driven forwarding and resource reservation method under a wireless SDN network. Through priority driving, existing low-priority Operate high-level service flows, reduce the bandwidth occupied by them or shorten the duration of their flow tables, and the free resources are used to satisfy high-priority service flows, which solves the problem that existing flows cannot be operated on in traditional networks, only The problem of being able to wait for the existing stream forwarding to complete before performing a new operation. The present invention is conducive to the optimization of switching fluency and resource consistency before and after switching in scenarios with complex services and frequent access switching, and has high application value in scenarios with complex and diverse services and intensive access, such as large commercial districts and entertainment venues.

Description

technical field [0001] The invention relates to the field of SDN computer networks, in particular to a priority-driven switching optimization strategy under wireless SDN. Background technique [0002] In recent years, with the birth and rise of Software-Defined Networking (SDN), more and more scholars and institutions have begun to study and apply SDN technology. Among them, the OpenFlow protocol, as the most widely used SDN implementation technology, has received extensive attention in the research of combining with wireless networks. It may make the characteristics that are traditionally difficult to achieve a reality. Odin proposed a lightweight virtual access point (Light Virtual Access Point, LVAP), which provides a virtual access point for each user connected to the network, that is, one-to-one mapping. OpenRadio discusses the problem of programmable wireless data plane, which provides a software abstraction layer, splits the wireless network into processing plane (ie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/851H04W28/02H04W28/10H04W28/16
CPCH04L47/24H04L47/2433H04W28/02H04W28/10H04W28/16
Inventor 程良伦林芝峰陈权
Owner GUANGDONG UNIV OF TECH
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