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An autonomous decentralized system and a series of methods for reducing the detection time of path failures in the system are developed. Computing devices in the proposed system are organized into at least three groups based on their connectivity of system's graph model. Each computing device is assigned three identification values associated with their group memberships. The identification values...
An on-demand electric power supply architecture in home based on quality-aware routing is proposed. In the architecture power sources and powered devices send quality parameters by which they supply or consume electric power. The network itself chooses best matching of a source and a device, and makes reservation of a path by RSVP-based QoS routing mechanism. In this paper the basic concepts and the...
With the advance of ubiquitous society including IPv6, it is expected that everything will be connected to the networking environment. Then, a ubiquitous grid networking environment (uGrid) has been proposed. In uGrid, everything from a device to a program is defined as “Service-Part”, and new mash-up services can be provided by connecting several ServiceParts. In this paper, IP Routing/Signaling-based...
This paper introduces Fibre Channel about its layers, topologies and class services. Emphasis is placed on the discussion of device login procedure and frame format in different topologies. Based on Xilinx FPGA chip, the design and implementation of the system uses the hardware and software cooperation model. In the experiment, we connect the system with Qlogic2340F and Brocade 200E Fabric switch...
In this paper, we compare the performance of RTS/ CTS unicast against receiver-based routing (RBR) within our implementation of the T-MAC protocol and give guidelines how to configure the protocol parameters to achieve a highly reliable communication with reduced energy consumption. Using the accurate energy model integrated in our simulator, we have evaluated the performance of the RBR service and...
In the recent years, the use of real-time Ethernet protocols becomes more and more relevant for time-critical networked industrial applications. In this context, this paper presents a method to compute the worst-case packet delays on switched Ethernet. Based on an evaluation of the packet delays at each switch port and the network topology, we construct a weighted directed graph that allows to find...
In this paper, we take a fresh look at stub-site multihoming within the paradigms of an identifier/locator split architecture. More specifically, we investigate the possibility of enabling multi-homed stub network sites to improve the performance of their end-to-end TCP flows by leveraging the path diversity of the underlying network. We design a host-network co-operative mechanism for end-to-end...
OpenFlow is an open standard that can be implemented in Ethernet switches, routers and wireless access points (AP). In the OpenFlow framework, packet forwarding (data plane) and routing decisions (control plane) run on different devices. OpenFlow switches are in charge of packet forwarding, whereas a controller set up switch forwarding table on a per-flow basis, to enable flow isolation and resource...
With high speed development of the internet, network security is increasingly outstanding. In the large-scale high-traffic network environment, the traditional technologies for network-based intrusion detection system can not satisfy the needs for real-time processing for the growing network traffic. This paper presented a NetFlow based anomaly intrusion detection system. In addition, guidelines to...
This paper introduces the Axon, an Ethernet-compatible device for creating large-scale datacenter networks. Axons are inexpensive, practical devices that are demonstrated using prototype hardware. Functionally, Axons replace Ethernet switches and maintain full compatibility with existing Ethernet hosts. Between themselves, however, Axons transparently use source-routed Ethernet. This unlocks many...
This paper discuss how to complement provider backbone bridge - traffic engineering (PBB-TE) networks with multipoint connections to implement a deterministic and simple-to-use multipoint network. We propose the learning and multicasting mechanisms for unknown destination and source addresses of clients, while the connection-oriented property or determinism of PBB-TE networks is maintained. Predetermined...
InfiniBand networks are aimed to fulfill increasing communication demand of parallel applications in high performance clusters. However, the dynamic behavior of communication load may cause bottlenecked link(s) which lead to message congestion. Congestion spreading increases latency and reduces network throughput causing important performance degradation. In this paper, we propose a congestion control...
During the design of complex networked systems, it is crucial to ensure the composability of the deployed applications and network protocols. Special care has to be taken to provide non-functional requirements like bandwidth and latency. Existing solutions only tackle this problem during the design phase; later refactoring or added components are not covered, potentially causing QoS violations. We...
Multi-homing has been widely adopted in todaypsilas Internet. Several solutions have been proposed to support multi-homing, and Shim6 became most promising for IPv6-based next generation Internet. This paper proposes a Shim6-based dynamic path-selection mechanism, which selects path adaptively to earn higher bandwidth utilities and better performance. The experiment result shows that the new mechanism...
In nowadays communication technologies, one of the main challenges to overcome is how to translate theoretical algorithms, designed protocols, existing hardware products from different manufacturers and the already knowhow into innovative applications that can produce a benefit for the user and for the commercializing firm. Following this topic, the present paper introduces an application that combines...
Providing network QoS involves, among other things, ensuring network survivability in spite of network faults. Fault recovery mechanisms should reduce recovery time, especially for real-time and mission-critical applications while guaranteeing QoS requirements, in terms of bandwidth and delay constraints and maximizing network resources utilization. In this paper, we propose a scalable recovery mechanism...
ForCES (forwarding and control element separation) architecture brought forward by IETF shows great advantages for network devices such as routers, wireless base stations, etc to be flexible, programmable, and cost-effective.This paper put forward a new high availability scheme for ForCES router. The framework of ForCES devices is firstly introduced. Then based on a revised VRRP protocol, a primary...
Packet-switched interconnect fabric is a promising on-chip communication solution for many-core architectures. It offers high throughput and excellent scalability for on-chip data and protocol transactions. The main problem posed by this communication fabric is the potentially-high and nondeterministic network latency caused by router data buffering and resource arbitration. This paper describes a...
Current mobile network architecture is constructed through introducing mobile IP protocol on the basis of IP network. On the one hand it cannot break away from the inherent limitation of IP network, such as no strong security, complex forwarding devices, lack of high expansibility and no QoS guarantee. On the other hand it brings some new problems due to the repair to IP network, such as the triangular...
Forwarding system is one of key components for high-performance router. In this paper, the architecture of router is described first. Then, software system of centralized router and the process of a packet are analyzed. At the end, the performance bottleneck of centralized router is pointed out. To get better performance, we propose a fast-forwarding mechanism to increase the speed of packet, which...
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