OpenFlow-based Networks Research Articles

Designing and experimentally demonstrating automatic OPS/OCS/OpenFlow network control driven by ChoiceNet provider

Interconnection between our existing optical packet and circuit integrated network (OPCInet) and an ecosystem for network service provisioning named ChoiceNet enables network service providers to provide diverse services and realize control driven by the providers. In this paper, we design and implement control interfaces for the interconnection, which enables each ChoiceNet provider to explicitly control both OPCInet- and OpenFlow-based networks by use of a single common interface with proprietary/easily modifiable message formats for all control functions. We construct an experimental setup between the USA and Japan, and demonstrate that the OPCInet and an OpenFlow-based network placed in Japan are successfully controlled by request from the ChoiceNet provider installed in the USA. We also show that the time required to complete Telnet access to the OPCInet C-plane for each control is no more than 150 ms over the long distance from the USA to Japan.

58 Open flow-based medical network minimum cost algorithm

Objectives Focusing on the problem of medical network performance bottlenecks in multiple domains, this paper proposes a federation across domain architecture, an inter-domain routing resource-providing method based on software defined networking (SDN) and a multi-controller minimum cost algorithm, and realizes resource optimization for cross-domain services. Methods Particle swarm optimization (PSO) was used to solve the problem of cross-domain medical network minimum cost. In the basic PSO algorithm, the particles are randomly distributed, with each particle representing a possible solution. The basic framework of the particle swarm algorithm shows that in each generation, each individual has a global optimum value and a historical optimum value. The best values found in the search replace the lesser values, and particles in each iteration adjust their flight direction and speed according to the optimum position. After several iterations comparing the particle’s fitness value, the particle’s speed and position are updated according to the formula. Finally, iteration or termination of the algorithm is carried out depending on the fitness value. Results Experimental results show that in the cross-domain medical network, inter-domain resources are the main cause of network blocking. When the number of domains is fixed, the inter-domain resource optimization algorithm decreases the blocking rate by more than 15% compared to a random strategy network, with the average hop count being about 12% less than with a random strategy, showing the proposed algorithm improves the medical network performance. Conclusions The algorithm proposes a multiple domain vertically integrated inter-domain routing architecture, the realization of a cross-domain business domain between resource optimization, thus achieving optimization of all medical network resources. Acknowledgments This research was financially supported by a project grant from the International Science and Technology Cooperation and Exchange Project of China (Grant No. 2013DEF13130).

Efficient mismatched packet buffer management with packet order-preserving for OpenFlow networks

OpenFlow-based networks simplify network management and improve network programmability by centralized network control. Existing OpenFlow networks employ packet-granularity mismatched packet buffer management to reduce the switch-controller communication overhead. However, the impact of packet buffer management granularity on network performance has not been well investigated yet. In this paper, we propose a novel design of flow-granularity mismatched packet buffer management model for OpenFlow networks, which outperforms the existing packet-granularity buffer management approaches with less communication overhead between switches and controllers. By designing the flow action pre-processing mechanism, we prevent per-flow packet disorder with less packet drop ratio. We evaluate the performance of the proposed flow-granularity mismatched packet buffer management scheme by building prototypes on both software and hardware switches. Experimental results reveal that our proposed method can effectively reduce the switches-controllers communication overhead, as well as preserve packet order for multi-flow OpenFlow networks.

Experimental demonstration of bandwidth on demand (BoD) provisioning based on time scheduling in software-defined multi-domain optical networks

Abstract A hierarchical software-defined networking (SDN) control architecture is designed for multi-domain optical networks with the Open Daylight (ODL) controller. The OpenFlow-based Control Virtual Network Interface (CVNI) protocol is deployed between the network orchestrator and the domain controllers. Then, a dynamic bandwidth on demand (BoD) provisioning solution is proposed based on time scheduling in software-defined multi-domain optical networks (SD-MDON). Shared Risk Link Groups (SRLG)-disjoint routing schemes are adopted to separate each tenant for reliability. The SD-MDON testbed is built based on the proposed hierarchical control architecture. Then the proposed time scheduling-based BoD (Ts-BoD) solution is experimentally demonstrated on the testbed. The performance of the Ts-BoD solution is evaluated with respect to blocking probability, resource utilization, and lightpath setup latency.

Towards an automated framework to instantiate virtual networks in OpenFlow-based infrastructures

The explosion of cloud applications and data-centres technologies has recently renewed the interest of both academic and industrial research community on network virtualisation techniques. The increasing availability of programmable network devices and the pervasive adoption of a software-defined networking approach in all segments of the network are paving the way toward novel virtualisation approaches which aim at improving network management operations while guaranteeing a better utilisation of resources especially when compared to traditional overlay-based techniques widely used in data-centre settings. In this paper, the experience gained by the authors in the development and deployment of an innovative network virtualisation framework on an OpenFlow-based programmable experimental facility is provided and discussed in detail. Despite its specific application to a Future Internet testbed scenario, the proposed architecture is a first step toward a completely automatic management of virtual networks in OpenFlow-based software-defined networks.

Modeling and Assessment Performance of OpenFlow-Based Network Control Plane

Modeling and Assessment Performance of OpenFlow-Based Network Control Plane

Performance Analysis of Proposed OpenFlow-Based Network Architecture Using Mininet

Future internet is required to be flexible, scalable, reliable, secure and having other advanced features. Software Defined Networking (SDN) fulfills most of the task to achieve require functioning. OpenFlow technology is the first standard for SDN which executes the protocols based on the required application. It is also capable for controlling multiple hardware or software switches from a single controller. This can be achieved by the separation of data plane and control plane from a network core devices. In this paper, a proposed architecture of an OpenFlow based small campus network is deployed. The performance analysis for a custom designed network model is achieved by executing few networking test on a defined nodes using network control protocols. The performance analysis of bandwidth, throughput and other network parameters between nodes for Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) connection is also performed. A custom model has been designed using a prototype network emulator that is Mininet and the code for network topology is executed in Python script.

Reducing Energy Consumption in Wired OpenFlow-Based Networks

Due to the proliferation of mobile devices such as smart phones and tablet computers, and increase in the speed of network devices to forward data, the Internet traffic has increased manyfold compare to a decade ago. Energy consumed by network devices handling the network traffic has increased manyfold also. Researchers are not only focusing on battery oriented network such as wireless sensor and ad hoc networks on saving battery power to extend network life but are also focusing on wired network to save energy consumed by network devices. Energy consumed by wired network can be reduced by putting underutilized network devices or links to sleep. If a network device has a few links such as a backbone network device, it is better to consider underutilized device to put to sleep, but if a network device has many links such as in data centers network devices and campus networks devices, it is better to consider underutilized links to put to sleep. In this paper, we consider putting underutilized links to sleep. Off course, if all links of a network device are put to sleep, the device itself will be put to sleep. Furthermore, in this paper we consider OpenFlow-based network as it is software defined network and flexible to control network devices. Besides, OpenFlow is being standardized by big enterprises such as NEC, Google, Cisco, Microsoft etc. We evaluated our approach by simulation and compare it with node based approach to see its effectiveness.

Implementation and Performance Analysis of Mobile Handoff Process on OpenFlow-based Wi-Fi Network

Research in communication networks has its limits due to the problems of supply frequency and equipment. To overcome this problem, open source can be the solution to build a helpful test bed for research or academic purposes. Open source networks can be developed using a Software Defined Network (SDN) which has been continuously developed due an enormous number of installed base equipment and protocols that are inflexible, predefined, and fixed since SDN offers a flexible, dynamic, and programmable functionality of network systems. By using OpenFlow as its protocol, we can program the network flow in a flow table on different switches and routers. This research approches an OpenFlow-based Wi-Fi environment using an OpenFlow-based Access Point (OFAP) and an OpenFlow controller. Each OFAP is deployed in two different rooms and several experiments were performed to evaluate handoff delay. The result of these experiments shows that an OpenFlow-based network delivers a more stable process than a traditional network because of the installed flows that are given to each packet. However, the discovered value needs to be examined further due to a better mechanism for installed flows. The handoff delay between OFAPs is 24% faster than the handoff delay between a traditional AP with an average of 79.9 miliseconds. By using this system, we believe it could deliver a high performance network and an increased reliability for real-time traffic over WLAN, by reducing the handoff delay compared to a classical Wi-Fi environment.

Independent Transient Plane Design for Protection in OpenFlow-Based Networks

Network protection against link failure is required to allow packets to reach the destination with minimal packet loss when a failure occurs. When a link fails, traffic that attempts to use the failed link is interrupted. Typically, routers in the network discover the failure and find a new route to bypass the failed link. Alternatively, well-known segment protection schemes can also be used to speed up the link recovery time by rerouting packets locally through precalculated protection paths. However, several backup paths have to be prepared for each primary path, making path configuration rather complex and poorly scalable. This paper proposes a design for fast rerouting in an OpenFlow-based network. This new design reduces the number of flow entries and the number of configuration messages needed for network rerouting, which in turn reduces the memory size needed in each switch and the CPU load at the controller. We show empirically and using simulations that our design can reduce the number of flow entries and configuration messages needed by about 60% and 75%, respectively, when compared with an existing OpenFlow-based segment protection design. Furthermore, we implement the proposed design on a pan-European network and show that our design can recover from a link failure in as little as 25 ms.

QoS-enabled streaming of multiple description coded video over OpenFlow-based networks

QoS-enabled streaming of multiple description coded video over OpenFlow-based networks

The Network Management System of WSS-Styled ROADMs Based on Openflow

This paper presents the design and implementation of an Openflow-based Network Management System. The system consists of GUI, Floodlight Controller and Agent (s), and it enables monitoring, control and management of ROADMs. WSS and OPM are two main modules of a ROADM system. They are connected with an Agent through Protocol of Serial Port, while GUI communicates with Floodlight Controller by Socket Protocol.

Data reconstruction in internet traffic matrix

Traffic matrix is an abstract representation of the traffic volume flowing between sets of source and destination pairs. It is a key input parameter of network operations management, planning, provisioning and traffic engineering. Traffic matrix is also important in the context of OpenFlow-based networks. Because even good measurement systems can suffer from errors and data collection systems can fail, missing values are common. Existing matrix completion methods do not consider traffic exhibit characteristics and only provide a finite precision. To address this problem, this paper proposes a novel approach based on compressive sensing and traffic self-similarity to reconstruct the missing traffic flow data. Firstly, we analyze the real-world traffic matrix, which all exhibit low-rank structure, temporal smoothness feature and spatial self-similarity. Then, we propose Self-Similarity and Temporal Compressive Sensing (SSTCS) algorithm to reconstruct the missing traffic data. The extensive experiments with the real-world traffic matrix show that our proposed SSTCS can significantly reduce data reconstruction errors and achieve satisfactory accuracy comparing with the existing solutions. Typically SSTCS can successfully reconstruct the traffic matrix with less than 32% errors when as much as 98% of the data is missing.

Network Innovation using OpenFlow: A Survey

OpenFlow is currently the most commonly deployed Software Defined Networking (SDN) technology. SDN consists of decoupling the control and data planes of a network. A software-based controller is responsible for managing the forwarding information of one or more switches; the hardware only handles the forwarding of traffic according to the rules set by the controller. OpenFlow is an SDN technology proposed to standardize the way that a controller communicates with network devices in an SDN architecture. It was proposed to enable researchers to test new ideas in a production environment. OpenFlow provides a specification to migrate the control logic from a switch into the controller. It also defines a protocol for the communication between the controller and the switches. As discussed in this survey paper, OpenFlow-based architectures have specific capabilities that can be exploited by researchers to experiment with new ideas and test novel applications. These capabilities include software-based traffic analysis, centralized control, dynamic updating of forwarding rules and flow abstraction. OpenFlow-based applications have been proposed to ease the configuration of a network, to simplify network management and to add security features, to virtualize networks and data centers and to deploy mobile systems. These applications run on top of networking operating systems such as Nox, Beacon, Maestro, Floodlight, Trema or Node.Flow. Larger scale OpenFlow infrastructures have been deployed to allow the research community to run experiments and test their applications in more realistic scenarios. Also, studies have measured the performance of OpenFlow networks through modelling and experimentation. We describe the challenges facing the large scale deployment of OpenFlow-based networks and we discuss future research directions of this technology.

Resource management in radio access and IP-based core networks for IMT Advanced and Beyond

The increased capacity needs, primarily driven by content distribution, and the vision of Internet-of-Things with billions of connected devices pose radically new demands on future wireless and mobile systems. In general the increased diversity and scale result in complex resource management and optimization problems in both radio access networks and the wired core network infrastructure. We summarize results in this area from a collaborative Sino-Swedish project within IMT Advanced and Beyond, covering adaptive radio resource management, energy-aware routing, OpenFlow-based network virtualization, data center networking, and access network caching for TV on demand.

Toward Service-aware Flow Visualization over OpenFlow-based Programmable Networks

Next-Generation Internet applications demand inherent flexibility and programmability from the underlying network. OpenFlow-based programmable network substrate, as a potential solution, provides the required support to enable network innovations by separating the intelligent control plane from the data-path processing. Several visualization tools have been designed in the context of OpenFlow to facilitate the effective management of programmable flow-centric network. However, most existing tools are still limited in supporting interactive visualization of flows. In this paper, we propose an attempt, called as service-aware flow visualization in programmable networks, which can interactively map the flows onto services. The proposed tool helps us to visually identify (i.e., separate) selected flows from all lists of flows (i.e., flowspace) and to monitor the status of selected flows.

Source flow

Flow-based networks such as OpenFlow-based networks have difficulty handling a large number of flows in a node due to the capacity limitation of search engine devices such as ternary content-addressable memory (TCAM). One typical solution of this problem would be to use MPLS-like tunneling, but this approach spoils the advantage of flow-by-flow path selection for load-balancing or QoS. We demonstrate a method named "Source Flow" that allows us to handle a huge amount of flows without changing the granularity of flows. By using our method, expensive and power consuming search engine devices can be removed from the core nodes, and the network can grow pretty scalable. In our demo, we construct a small network that consists of small number of OpenFlow switches, a single OpenFlow controller, and end-hosts. The hosts generate more than one million flows simultaneously and the flows are controlled on a per-flow-basis. All active flows are monitored and visualized on a user interface and the user interface allows audiences to confirm if our method is feasible and deployable.