Logically Centralized-Physically Distributed Software Defined Network Controller Architecture

2018 ◽  
Author(s):  
Catherine Nayer Tadros ◽  
Bassem Mokhtar ◽  
Mohamed R. M. Rizk
Keyword(s):  
Software Defined Network ◽  
Distributed Software ◽  
Network Controller

scholarly journals NOTED: a framework to optimise network traffic via the analysis of data from File Transfer Services

2021 ◽  
Vol 251 ◽  
pp. 02049
Author(s):  
Joanna Waczyńska ◽  
Edoardo Martelli ◽  
Edward Karavakis ◽  
Tony Cass
Keyword(s):  
Network Topology ◽  
Network Traffic ◽  
Operating Costs ◽  
Network Reconfiguration ◽  
Software Defined Network ◽  
File Transfer ◽  
Network Controller ◽  
Network Intelligence ◽  
Main Components ◽  
Transfer Services

Network traffic optimisation is difficult as the load is by nature dynamic and seemingly unpredictable. However, the increased usage of file transfer services may help the detection of future loads and the prediction of their expected duration. The NOTED project seeks to do exactly this and to dynamically adapt network topology to deliver improved bandwidth for users of such services. This article introduces, and explains the features of, the two main components of NOTED, the Transfer Broker and the Network Intelligence component. The Transfer Broker analyses all queued and on-going FTS transfers, producing a traffic report which can be used by network controllers. Based on this report and its knowledge of the network topology and routing, the Network Intelligence (NI) component makes decisions as to when a network reconfiguration could be beneficial. Any Software Defined Network controller can then apply these decision to the network, so optimising transfer execution time and reducing operating costs.

scholarly journals Adaptive Software-defined Network Controller for Multipath Routing based on Reduction of Time

2020 ◽  
Vol 4 (2) ◽  
pp. 107
Author(s):  
Hemin Kamal Kakahama ◽  
Miran Taha
Keyword(s):  
Delay Time ◽  
Multipath Routing ◽  
Management Control ◽  
Software Defined Network ◽  
New Paradigm ◽  
Global Knowledge ◽  
The Arts ◽  
Network Controller ◽  
Time Calculation ◽  
Sdn Controller

Software-defined network (SDN) is a new paradigm in the networking that makes a programmability and intelligence the networks. The main SDN characterize is separating network management (control plane) from the forwarding device (data plane). SDN logically centralizes the network with the programmable controller which collects global knowledge about the network. The SDNs can improve the performance of the routing packets in the networks because of agility and the ability to create a policy for a driven network. In the multipath routing, the SDNs controller is responsible to calculate the routes of optimum path and alternative path wherever a link is failed. However, a high delay time calculation of selecting optimum and alternative paths in multipath routing by the SDN controller is observed in the recent investigations. In this paper, we propose an efficient algorithm for SDN multipath routing controller. The mechanism of the proposed approach calculates the best path from the source to the destination which is based on using adaptive packet size and observing network link capacity. The proposed algorithm considers reducing delay time of the link handling when the flow traffic switches from the main path to the recovery path. As a result, this approach is compared to some state of the arts according to the delay time of choosing the best path and alternative paths in a given network topology. SDN based on the proposed algorithm consumed approximately 1 ms for selecting recovery routes. On the other hand, the proposed algorithm can be integrated to an SDN controller which provides better consolidation of transmission for sensitive applications as video streaming.

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