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Multi-layer Provisioning (MLP) of End-to-End light-path in OBS/GMPLS interworking network is successfully demonstrated by introducing extensions to MPLS signaling protocol in LOBS network. The feasibility of this mechanism was experimentally verified in an OBS/GMPLS testbed. In contrast to pervious single-layer resource provision mechanism, MLP ensures stable and high throughput of Reno TCP transportation.
A number of large-scale applications require 10 Gbps data transport rates between high-performance computing, storage and file systems, which are connected over wide-area networks. Achieving such capability requires end-to-end optimization of all required hardware and software components including: (i) long haul SONET or 10 GigE connections; (ii) transport protocols such as TCP and UDT, (iii) encryption...
We study end-to-end delay performance of different routing algorithms in networks with random failures. Specifically, we compare delay performances of differential backlog (DB) and shortest path (SP) routing algorithms and show that DB routing outperforms SP routing in terms of throughput when the network is heavily loaded and/or the failure rate is high while SP routing achieves better delay performance...
In this paper, we investigate the packet transmission delay in a time varying satellite uplink. Specifically, we are interested in bounding the packet transmission delay within the terminal router for uplink traffic in a future satellite network. Previous work has provided delay bounds for wireline networks with a fixed transmission rate. However, these bounds do not apply to the time-varying satellite...
Cooperative hybrid-ARQ (HARQ) protocols have been widely studied because they are more efficient than cooperative protocols without HARQ. In, the throughput of a cooperative HARQ protocol based on the decode-and-forward protocol (DF-HARQ) is obtained. In this paper, the maximum achievable throughput of the DF-HARQ protocol is obtained using the asymptotic outage probability when the maximum number...
The optimised link state routing (OLSR) is a proactive routing protocol which relies on periodical broadcast of routing packets. However, due to the one-to-many relationship of broadcast traffic, the delivery of these packets can not be guaranteed by underlying MAC protocol, particularly in a congested condition. In this paper, the possible routing pathologies and failures of OLSR in a congested network...
An upstream congestion control (UCC) protocol based on cross-layer design is proposed to reduce packet losses and energy waste due to a large number of retransmissions and packet drops. The UCC protocol takes advantage of unoccupied buffer size and traffic rate at MAC layer as congestion level indication, and based on which, every upstream traffic rate is adjusted at network layer with its source...
ALM (Application Level Multicast) is one of the promising ways for resolving multicast incentive problem of non-multicast hosts not implementing multicast routing protocol. ALM protocol is implemented in application layer, which means it is easier to be altered by end users than lower layer protocols. Malicious users would like to get higher position in ALM tree because it can obtain higher throughput...
One of the major QoS goals for future battlefield networks (FBN) is to ensure multi-level precedence and preemption (MLPP). Ensuring MLPP is difficult, partly due to the networking architecture for FBN which consists of wired ??red?? network connected by encrypted wireless ??black?? network. The security requirements for FBN do not allow passing information from black to red networks. So when congestion...
In this paper a communication system operating over a Gilbert-Elliot channel is studied. The goal of the transmitter is to maximize the number of successfully transmitted bits. This is achieved by choosing among three possible actions: (i) betting aggressively by using a weak code that allows the transmission of a high number of bits but provides no protection against a bad channel, (ii) betting conservatively...
For wireless sensor networks (WSN) involved in geographical surveillance type applications, obtaining information from a specified region of interest is important. The information itself is dependent upon the application type specific sensors deployed within the network region. For the purpose of this study we propose a new routing protocol called swarm intelligent odour based routing (SWOB) that...
In this paper, we introduce a new denial-of-service attack on wireless networks: low-power, distributed jamming network (DJN). DJN is composed of large number of low-power jamming devices, which are deployed in proximity to the target devices. DJN can cause significant damage to target network performance with high energy efficiency. In the paper, we provide a characterization of DJN, demonstrate...
Tactical air-to-ground channels present a number of challenges for physical (PHY) layer waveform design including: (i) airborne platform dynamics (i.e., Doppler, frequency offset, jerk, etc.), (ii) benign to severe ground-level multipath, and (iii) partial to full blockage of the line-of-sight (LOS) path. Legacy military waveforms are not sufficiently robust to operate effectively in these severe...
It is widely known that TCP's congestion control algorithm can cause it to under-perform when round trip times and error rates are high. Performance Enhancing Proxies (PEPs) can improve performance by breaking end-to-end TCP connections and using a separate, tuned transport protocol to transit 'stressed' links. While PEPs can be tuned to work well when a single pair of PEPs bracket a fixed-rate link,...
The problem of anonymous wireless networking is considered when adversaries who monitor the transmissions in the network are also capable of compromising a fraction of nodes to extract network information. For a given level of network performance, as measured by network throughput, the problem of maximizing anonymity is studied from a game-theoretic perspective. The metric of anonymity considered...
In the tactical Internet, inter-domain links consist mostly of unreliable and low bandwidth wireless links. To enable seamless routing across different Autonomous Systems (ASes), we propose an inter-domain Traffic Engineering (TE) scheme to reroute traffic when congestion occurs. There are two components for the TE scheme. First, a Traffic Splitting (TS) scheme is used for load balancing among parallel...
This paper presents a theoretical analysis of the parallel iterative matching (PIM)'s dynamics with multiple iterations used in an input-buffered packet switch. In the past, the formulation on the switching performance was derived by using the Stirling number of the Second Kind, which is a summary the number of different matches under traffic with uniform distribution. However, when traffic has a...
The introduction of Common Radio Resource Management (CRRM) facilitates the coordination of multiple overlapped Radio Access Technologies (RATs). A Network Controlled Cell Breathing (NCCB) RAT selection algorithm is proposed in the literature for combined GSM/UMTS networks. The setting of a proper path loss threshold is a key issue in the NCCB algorithm. In this paper, the relationship among overall...
Congestion in a Wireless Sensor Network (WSN) can cause missing packets, low energy efficiency, and long delay. Moreover, some applications, e.g. multimedia and image, need to transmit large volumes of data concurrently from several sensors. These applications have different delay and QoS requirements. Congestion problem is more urgent in such applications. To address this challenge, we propose an...
Owing to the dynamic nature of grid computing environment, system behavior such as QoS for consumer depends crucially on the selection of appropriate subset of the available resources. Thus, a well-defined system model that provides high system availability using a scheduling mechanism is required. In this paper, we propose the SLA based Policy Administrator (SPA) with the resource scheduling scheme...
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