Dynamic Link Metric Selection for Traffic Aggregation and Multipath Transmission in Software-Defined Networks

Author:

Rzym Grzegorz1ORCID,Duliński Zbigniew2ORCID,Chołda Piotr1ORCID

Affiliation:

1. AGH University of Krakow, Institute of Telecommunications, Al. Mickiewicza 30, 30-059 Kraków, Poland

2. Institute of Applied Computer Science, Mark Kac Center for Complex Systems Research, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland

Abstract

Software-defined networks (SDNs) are expanding their presence beyond laboratories, campus networks, ISPs, and data centre networks, moving into various domains. Although originally designed for campus networks, SDNs face scalability challenges, especially with the use of OpenFlow. Addressing these challenges requires innovative traffic management mechanisms to efficiently handle the growing number of connected devices and the increasing volume of traffic from various types of applications. This article proposes an innovative method for link weight selection that incorporates multipath transmission and flow aggregation in the SDNs. This novel approach improves resource utilization in two key ways. First, it involves the preservation of bandwidth during congestion. Second, it minimizes internal resource usage, as illustrated by a reduction in the number of table entries in switches. Resources undergo optimization through the introduction of a novel mechanism for flow aggregation. This novel mechanism, coupled with multipath transmission, enables adaptive responses to dynamic changes in network conditions. The aggregation process leads to a reduced number of flow entries in the core switches compared to the conventional operation of OpenFlow. The proposed scenarios for link weight allocation allow for a reduction in the number of entries in the core switches by up to 99%. The application of the proposed method also results in an increase of 58% in traffic transmission.

Funder

AGH University of Krakow

Polish Ministry of Science and Higher Education

Jagiellonian University

Polish Innovation Economy Operational Program

National Research Institute

Publisher

MDPI AG

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