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The Datagram Congestion Control Protocol (DCCP) protocol was proposed to provide a great variety of functionality to real-time applications. Its congestion control mechanisms were defined to be friendly to the TCP-Reno, which makes its operation inappropriate to high speed networks. In this paper, a variant of the DCCP, called FAST DCCP, is proposed to overcome such deficiency. As evidenced by experimental...
The eXplicit Control Protocol (XCP) is a promising congestion control protocol that outperforms TCP in terms of efficiency, fairness, persistent queue length, and packet loss rate. However, XCP will behave in a noticeably unstable manner if the maximum round trip time of a flow is much larger than average round trip time of all flows, which is a typical nonlinear instability. In this paper, eXCP is...
Iterative, or negotiated, pricing mechanisms have been of interest for decades as a systematic means of operating electricity markets, and have more recently been proposed as a way of dealing with the increased diversity of responsive market participants brought about by smart grid technologies and the increasing share of intermittent energy sources. One possibility is for the market coordinator to...
We analyze the quality of service (QoS) performance of different traffic classes in optical-wireless converged networks when different resource handling mechanisms are used. We show that in order to achieve the optimum QoS performance in the EPON-WiMAX converged network for all traffic classes, a proper combination of a dynamic bandwidth allocation algorithm, an intra ONU-BS (integrated optical network...
Distributed systems benefit substantially from the ability to exchange jobs between temporarily heavily and lightly loaded nodes. Depending on whether the lightly or heavily loaded nodes initiate the job exchange, such strategies are termed pull or push strategies. In this paper we compare the performance of an aggressive push strategy with the more traditional pull strategies in large distributed...
Delay Tolerant Network with New Serial Convergence Layer (DTN-NSCL) is a wireless serial RS-232 communication and networking protocol based on DTN2 reference implementation. Its novelty lies in the incorporation of multiple access control and neighbour discovery onto Delay Tolerant Network with Original Serial Convergence Layer (DTN-OSCL). This new aprotocol is able to provide long-haul communication...
This paper presents a two-gain Iterative Learning Control (ILC) design for nonlinear discrete systems with time delays in state. The convergence of the proposed ILC rule with sufficient condition is derived based on a kind of two-dimensional (2-D) linear inequalities. The proposed ILC rule is able to guarantee convergence of the learning process against fixed iterative initial errors. An example is...
RCP algorithm is a rate-based explicit congestion control, it performs well on the efficiency convergence and fairness convergence and has a good performance under the multiple-bottleneck network topology environment. But some researches show that, when a new flow join in the network RCP algorithm exists severe instantaneous over loading, this phenomenon results in the packet loss. We added source...
Optical long distance and high speed networks require an effective flow control scheme better than the ordinary TCP. In this paper, we examine two cross-layer flow control schemes, XCP and XLBA especially for short burst flows. Cross-layer flow controls are essential means to optimize bandwidth utilization and fairness without severe control instability. We are proposing XLBA which eliminates feedback...
BGP (Border Gateway Protocol) as a kind of mature routing protocols, has been widely applied in all kinds of largescale network. With regard to routing protocol, the important problem is the convergence time, which is an important index to evaluate the availability and robustness of network. This paper analyzes the network convergence problem, elaborates the method of accelerating network convergence...
To solve anycast routing problem with multiple QoS constraints, a improved anycast routing algorithm based on simplified particle swarm optimization algorithm and diversity strategy is presented. Firstly, the algorithm simplified the complexity of standard PSO algorithm and improved the convergence velocity extraordinarily by dynamically changing the inertia weight. Then, a mutation operator and diversity...
The close loop P type iterative learning control is proposed for systems with state delay in this paper. The design procedure is based upon obtaining the sufficient condition of convergence by Lyapunov theory, an iterative learning law is obtained by resolving linear matrix inequalities (LMI). The proposed method is more easily realized and strong practical. The scheme proposed guarantees that the...
Bottleneck in the production system has become an important factor to achieve the objective. How to deal with bottleneck resource utilization, load balance and reasonable arrangement for the production tasks has become one of the main tasks for production scheduling research. More and More enterprises and scholars are concerned about bottleneck production. So bottleneck identification has become the...
As one of the key technologies in Ad hoc networks, clock synchronization is the prerequisite of important network functions. Main consideration in clock synchronization are the choice of global clock and the accuracy, in which the existing clock synchronization methods still suffer lack. In this paper, the network delay is measured in networking process, and the network nodes complete synchronization...
In the short- and mid-term visions for robotics development, robots are expected to be used also in small and medium-sized companies, sharing spaces with different manufacturing cycles and possibly with human operators. This objective can be fulfilled only assuring high flexibility in production control, safety for workers and for machinery, and interfaces that allow an easy use of the equipment....
In this paper, we prove the existence, uniqueness and successive convergence for a stochastic differential multi-delay system with respect to a continuous martingale. Also, an uniformly convergence rate and the error estimation in L2 of approximate solution are given.
Aiming at the problems of the different authentication information and authentication methods in heterogeneous wireless network, based on the idea of the separation of identity, position, addressing etc information, the paper puts forward the unified client identity, and builds a complete client identity hiding and substitution mechanism, which effectively solve the moving terminals unified access...
In this paper we show data plane restoration measurements for restoration under backbone link failures for a large network with IP/MPLS OSPF routing and also for the same backbone with Traffic Engineering (TE) and Fast Reroute (FRR) deployed. Our study is unique as we analyzed a significant quantity of measurements obtained from a production network over a 14-month period encompassing many link failures...
Since the TCP transmission rate is low during the startup phase, the QoS of various applications is seriously degraded. To improve the TCP transmission rate in the startup phase, many fast startup algorithms have been proposed. In this paper, we evaluate the fundamental performance of fast startup algorithms. Specifically, we focus on the initial window size and Rate-Based Pacing (RBP) start method,...
In this paper a waveform relaxation algorithm based on longitudinal partitioning is presented to efficiently model large distributed networks. The proposed methodology represents lossy transmission lines as a cascade of lumped circuit elements and lossless line segments, where the lossless line segments are modeled using the method of characteristics. This allows the transmission line to be naturally...
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