Priority-level driving type handover optimization method under wireless SDN

Abstract

The invention discloses a priority-level driving type handover optimization method under a wireless SDN. According to the method, a priority-level driving type forwarding and resource reservation method is put forward in a wireless SDN network. With the priority-level driving mode, the existing low-priority-level service flow can be operated, so that the occupied bandwidth is reduced or the flow table lasting time is shortened; the spare resources are used for meeting the high-priority-level service flow, so that problems that the existing flow can not be operated in the traditional network and the new operation can not be performed until the existing flow is forwarded completely can be solved. Therefore, optimization of handover smoothness and resource consistency before and after handover on the occasions of complicated services and frequent access handover is realized well; and the method has the great application value on the complicated-service, diversified-service, and access-intensive occasions like a large business district and an entertainment place.

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...

AI Technical Summary

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

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