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In this paper, an optimal control allocation strategy is presented for an eight in-wheel-motor independent drive electric vehicle/four double front wheel steering(8WD/4WS). The upper level controller consists of a speed following controller and two sliding mode controllers. The speed tracking controller obtains the desired longitudinal force by tracking the longitudinal speed. Two sliding mode controllers...
Supporting random access of a large number of devices in a short time period is an enormous challenge in machine-to-machine (M2M) communications. In this paper, we propose a dynamic allocation scheme of random access channel (RACH) resource for clustered machine-to-machine (M2M) communications, in which delay-sensitive devices coexist with delay-tolerant ones. Since delay-sensitive devices share random...
One of the main challenges of network virtualization is efficient mapping of virtual nodes and virtual links onto the substrate network resources, which is known as virtual network embedding (VNE) problem. This paper aims to increase the revenue and utilization of infrastructure provider as well as achieve efficiency mapping. Due to the NP-hard character of VNE, we model the VNE problem as an integer...
Most of the current researches in virtual network embedding field often assume that the VN requests are static. However, in practical cases, virtual network requests on substrate resources change dynamically over time. To support such dynamical feature, we model the VNE problem as a mixed linear programming problem and use multiple queues to store different types of virtual network requests respectively...
Current data centers in cloud computing have flexible mechanisms to lease compute resources, but provide little control mechanism to share network resource. Traffic flows from different tenants' VMs will competing network resource on the substrate network, thus can resulting in unpredictable performance degradation. This paper proposes an economic model for fair leasing the network resource between...
In this work, we present an optimal power allocation scheme dedicated for variable-hop cooperative relays in cognitive networks, which consists of Secondary users (SUs) operating in Amplify-and-Forward (AF) mode, with a Primary user (PU) receiver nearby. In order to assure the quality of service (QoS) for PU, transmit power of cognitive radio (CR) nodes must be tightly controlled which leads to narrow...
Nowadays wireless network virtualization technique provides a practical perspective for splitting a single wireless network into multiple independent slices to support isolated virtual networks. A key problem for infrastructure providers is the fairness that needs to be provided among different virtual networks. In this paper, we provide a simplified method implemented by Click Modular router to take...
For future Internet, network virtualization provides the feasibility of running multiple routing architectures on a shared physical infrastructure. This paper presents the design and evaluation of a bandwidth allocation algorithm based on multi-commodity flow problem solver, which integrated with a traffic predictor. The basic idea of our design is that some failure in the MFP computation implies...
Recent studies have demonstrated that language-based static analysis is capable of finding hundreds of bugs in complex real systems. Such static analysis allows users to specify properties in a specification language on demand. Paths in control flow graphs are explored exhaustively against user-defined properties. To avoid the potential path explosion problem, many techniques have been used in practice...
Recently, the significantly increased IPv6 address length has posed a greater challenge on wire-speed router for packet classification (PC). Most conventional IPv4-based PC algorithms are no longer suitable for IPv6 PC. The performance and capacity of many IPv6 algorithms and classification devices depend upon properties of the IPv6 classifiers. However, there are no publicly available IPv6 real classifiers...
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