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Datacenter network always needs to be updated so that it can adapt to frequent traffic changes and constantly achieve high network utilization. However, the quality of service can be easily reduced by unexpected transient link congestion, which may be caused by variable link transmission latency during flow migration. Furthermore, when network administrators reallocate bandwidth resource without taking...
Software-Defined Networking is a new approach to the design and management of networks. It decouples the software-based control plane from the hardware-based data plane while abstracting the underlying network infrastructure and moving the network intelligence to a centralized software-based controller where network services are deployed. The challenge is then to efficiently provision the service...
In software defined networks, control plane is decoupled from data plane and is directly programmable. Network controller retrieves an integrated view of data plane and thus an End-to-End (E2E) QoS guarantee is easier to realize than classic network paradigms. Deterministic Network Calculus (DNC) is a network analysis tool to provide a deterministic delay or bandwidth bound. In this proposal, an E2E...
This paper presents a novel hybrid ant colony optimization approach (ACO&CM) to solve quality of service (QoS) multicast routing problem. The main feature of this hybrid algorithm is to hybridize the solution construction mechanism of the ACO with cloud model (CM). Moreover, the hybrid algorithm considers both solution diversification and solution quality, and it adopts cloud model to avoid excessive...
Network messaging delay historically constitutes a large portion of the wall-clock time for High Performance Computing (HPC) applications, as these applications run on many nodes and involve intensive communication among their tasks. Dragonfly network topology has emerged as a promising solution for building exascale HPC systems owing to its low network diameter and large bisection bandwidth. Dragonfly...
Software-Defined Networking (SDN) is an emerging architecture and offers advantages over traditional network architecture, while there exist some scalability challenges. In this paper, we propose a multicast routing algorithm for SDN with segment routing to serve the bandwidth requirement of a multicast routing request. Our algorithm considers the balance of traffic load for network resource of link...
New applications where anyone can broadcast video are becoming very popular on smartphones. With the advent of high definition video, ISP providers may take the opportunity to propose new high quality broadcast services to their clients. Because of its centralized control plane, Software Defined Networking (SDN) seems an ideal way to deploy such a service in a flexible and bandwidth-efficient way...
Interconnection network is a main concern in the architecture design of highly parallel systems such as high density data centers and supercomputers that reach millions of endpoints, e.g., 10M cores for Sunway TaihuLight system. As the number of endpoints of such systems has gradually increased to meet the higher computing and storage demand, the interconnection network is required to provide a low...
Global IP traffic is forecast to triple by 2020 to reach 2.3 ZB per year. Such an explosion will inevitably be the catalyst of Operator infrastructure transformation. In this context, SDN is the technology that is shaping the future of carriers' networks. It offers the opportunity to implement more powerful control algorithms. In this perspective, we put forward a SD-WAN architecture to enhance the...
Multi-Path TCP (MPTCP) boosts network performance of applications by aggregating bandwidth over multiple paths using sub-flows of the same TCP connection. However, MPTCP suffers from three limitations: (1) it is an end-to-end protocol with no control over the network routes, and sub-flows might end up traversing the same links, (2) it has no dynamic control over choosing the optimal number of sub-flows...
This paper proposes a new QoS-aware forwarding strategy for Named Data Networking. Borrowing techniques from the ant colony optimization, the proposed strategy, which is called Ant colony based QoS-aware forwarding strategy (AC-QoS-FS), makes full use of both forward and backward ants to rank interfaces. Forward and backward ants (Interest and Data packets) probe realtime network QoS parameters to...
The centralized control in Software Defined Networks paves the way for new services like Bandwidth Calendaring (BWC), where the possibility to shift temporally future bandwidth requests allows to efficiently use network resources. Assuming perfect knowledge of the calendar for all future bandwidth reservations is unrealistic. In this paper, we study the online version of the BWC problem presented...
Among the low-diameter, high-radix networks beingdeployed in next-generation HPC systems, dual-rail fat-treenetworks are a promising approach. Adding additional injectionconnections (rails) to one or more network planes allows multirailfat-tree networks to alleviate communication bottlenecks. These multi-rail networks necessitate new design considerations, such as routing choices, job placements,...
MANETS are heterogeneous, self configuring networks in which topology changes very frequently due to the mobility of nodes. Mobile nature of wireless nodes requires periodic updation of routing information and updating of other parameters. This paper majorly concentrates on the idea of discovering the Quality of service (QoS) parameters in Mobile Ad hoc Networks (MANETS) by providing an hybrid approach...
Quality of Service (QoS) and Inter-domain traffic control are the current research topics in the fields of computer communication and IP Telephony in Local Area Network (LAN), Wide Area Network (WAN) and Wi-Fi network. By appropriate design and implementation of QoS and traffic control in a corporate network a significant amount of bandwidth and thereby money can be saved. Performance and reliability...
With the increasing demand for communication quality, improving the service quality has become the focus and difficulty of the research. The traditional method has its limitations. The cross layer design method can break the barriers between layers, and ensure the quality of service transmission. This article proposes a cross-layer scheme called Ad hoc On-demand Distance Vector Routing Cross-layer...
This paper proposes an application-aware multipath flow routing framework that integrates Machine Learning Techniques (MLT) in Software Defined Networks (SDN). Applications generated by the devices are diverse in nature, for each application bandwidth and delay requirements vary. The flows in the network compete for a constrained resource such as bandwidth or low latency path, an intelligent flow...
Software defined network with centralized control and flexibility of programming has been widely used. And congestion could occur easily in this kind of network owing to more elephant flows with increasing network requirements. To resolve the problem, this paper proposed an ant colony optimization algorithm based on flow scheduling system (TSACO). The system accurately detects elephant flows with...
Communications systems make heavy use of FPGAs; their programmability allows system designers to keep up with emerging protocols and their high-speed transceivers enable high bandwidth designs. While FPGAs are extensively used for packet parsing, inspection and classification, they have seen less use as the switch fabric between network ports. However, recent work has proposed embedding a network-on-chip...
Designing a cost-effective network topology for data centers that can deliver sufficient bandwidth and consistent latency performance to a large number of servers has been an important and challenging problem. Many server-centric data center network topologies have been proposed recently due to their significant advantage in cost-efficiency and data center agility, such as BCube, FiConn and BCN. However,...
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