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This paper analyzes the convergence properties of a distributed proportional-integral protocol for coordination of a network of agents with multiple leaders, dynamic information flow, and quantized measurements. We show that the integral term of the protocol allows the follower agents to ‘learn’ the reference rate, rather than have it available a priori, and also provides disturbance rejection capabilities.
IP/MPLS based ASON/GMPLS networks enable the interaction between the IP layer and the optical WDM layer. Furthermore, it decouples the physical topology from the dynamically created IP topology, which is called Virtual Topology. In this network architecture, there are two known routing policies, they are the Physical Topology First (PTF) and Virtual Topology First (VTF). PTF and VTF are different...
In this paper, we proposal an content provider mobility solution of Named Data Networking (NDN) [1]. Here content provider means the host of NDN network which provide content originally.
Multi-Technology Operations System Interface (MTOSI) as an open interface has been proposed by TM-Forum in 2003. It not only supports the interactions between EMS-NMS like MTNM, also it generalizes the logic, and can be used for the communications between the other operations systems involved in the OSS. In this work, we first proposed the novel modular structured OSS functional architecture model...
In this paper, we study an optimal topology and routing problem in the body area network (BAN). Aiming at maximizing the network lifetime, we consider the guarantee of two important quality-of-service (QoS) requirements for BAN applications: the minimum bit error rate and the minimum data rate. Especially, we study the effect of the maximum number of hops that is allowed in routing to the system performance.
Fast fault restoration is essential in carrier-grade transport network for QoS-guaranteed service provisioning and efficient traffic engineering. The performances of multi-layered protection switching with control-forwarding separation, however, have not been studied in detail. In this paper, we propose a fast fault restoration in multi-layered network with Control-Forwarding separation. The proposed...
The objective of this work is to build an efficient WSN (Wireless Sensor Network) with long lifetime for indoor monitoring application, which requires network auto-organization and robustness against node failure and node association. In this paper, a novel MAC protocol, ADCF (Adaptive and Distributed Collision-Free), is proposed. ADCF uses CFBS (Collision-Free Beacon Slot) and CFDS (Collision-Free...
We present a compositional approach to formally verify quality-of-service (QoS) properties of network-on-chip (NoC) designs. A major challenge to scalability is the need to verify latency bounds for hundreds to thousands of cycles, which are beyond the capacity of state-of-the-art model checkers. We address this challenge by a compositional form of k-induction. The overall latency bound problem is...
In communication networks data packets are often transmitted via multiple hops on certain destined source-destination paths. The topological structure of such a scenario can be modeled by multi-node tandem queueing networks, but the standard independence assumption of queueing theory does not hold, that is, modeling the packet processing times at the successive nodes as independent and identically...
Our paper proposes a new quality of service concept for smart home services. We assume that every flat in a house has its own smart computer to perform local services and acts as an interface for the different sensors and actors inside the flat. These smart computers are interconnected using a plain switched Ethernet infrastructure. A central server offers shared services for each user and a gateway...
The paper presents the management system of the IPv6 QoS Parallel Internet. The IPv6 QoS Parallel Internet has been developed as a part of the IIP System, which is the result of the project “Future Internet Engineering”. The architecture of the IIP System applies virtualization concept for supporting a number of Parallel Internets while using the same physical network infrastructure. The management...
This paper proposes a new multi-rate H.264 scalable video multicast in lossy network using network coding. We first prioritize video layer based on its effect to the end-to-end video quality. Each video layer is routed via the path obtained from the optimization framework under the constraints on QoS guarantees. Different destinations may receive different number of video layers depended on their...
This paper presents a Hybrid Service Overlay Network (H-SON) for composing Service Specific Overlay Networks (SSON) in mobile environments. The overlay topology is organized into dynamically-adaptable hierarchical Chord rings reflecting node mobility and service quality transformation. Moreover, our loss-based utility function is used to predict the client's QoE. Node resources can thus be automatically...
The operation of wireless network protocol stacks is heavily dependent on the actual deployment of the system and especially on the corresponding network topology, e.g. due to channel contention. The nature of wireless communication does not allow for a-priori determination of network topology, network-defining metrics such as neighbor density and routing span may drastically differ for various deployments...
The large scale and high performance requirements of Cloud computing pose many challenges to the data center network operators. These networks typically require high bisection bandwidth, strict performance isolation, and power-efficient operation. Recently, many researchers have proposed various network controller systems for programming networks, each of them to individually address only one of these...
Constrained minimum Steiner tree (CMST) problem is a key issue in multicast routing with quality of service (QoS) support. Many heuristics have been developed to solve this NP-complete problem. The bounded shortest multicast algorithm (BSMA) has been proved to be able to find solutions of very low cost with reasonable computation time. As such, it is still being widely used as a benchmark to evaluate...
Content distribution networks (CDNs) using storage clouds have recently started to emerge. Compared to traditional CDNs, storage cloud-based CDNs have the advantage of cost effectively offering hosting services to Web content providers without owning infrastructure. However, existing work on replica placement in CDNs does not readily apply in the cloud. In this paper, we investigated the joint problem...
Due to the Internet¡¦s scalability and connectivity, enterprises and organizations increasingly rely upon it to provide services for customers. However, attackers intelligently attack enterprises and organizations through continuous vulnerability exploitation and advanced malware. Recently, assailants have applied the characteristics of fast propagation and epidemic attack infection to launch more...
How to apply timely and effective defense strategies against attackers while maximizing system survivability is a critical issue for a defender. This paper mathematically models attack and defense scenarios, using various defensive mechanisms during both the planning and defending stages and under quality of service constraints. This model incorporates high degrees of randomness, as attackers are...
We present the low-power wireless bus (LWB), a new communication paradigm for QoS-aware data collection in low-power sensor networks. The LWB maps all communication onto network floods by using Glossy, an efficient flooding architecture for wireless sensor networks. Therefore, unlike current solutions, the LWB requires no information of the network topology, and inherently supports networks with mobile...
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