This paper presents an optimal roadside unit (RSU) placement method for vehicle localization in Vehicle Ad-hoc Networks (VANETs). Since the RSU layout can significantly affect performance of algorithms, proposed needs to find K-coverage placement, ensure best accuracy while using minimum number RSUs. We adopt Geometric Dilution Precision (GDOP) metric evaluate provided by placements, and derive expression GDOP towards received signal strength (RSS) hybrid parameter estimators, respectively....

Location-based routing (LBR) is one of the most widely used strategies in large-scale wireless sensor networks. With LBR, small, cheap and resource-constrained nodes can perform function without need complex computations large amounts memory space. Further, do not to send energy consuming periodic advertisements because tables, traditional sense, are needed. One important assumption made by LBR protocols availability a location service or mechanism find other nodes' positions. Although...

In this letter, the anchor scheduling scheme for localization in heterogeneous wireless sensor networks is studied. order to minimize number of actively participating anchors prolong network lifetime, we propose a centralized on basis software-defined networking (SDN) paradigm. First, an expression evaluating connectivity degree agent derived and used judge if has desired connected its localization. Then, state each determined by SDN controller through flow table via OpenFlow. Simulations...

Code dissemination in wireless sensor networks refers to the process of disseminating a new code image via links all nodes after they are deployed. It is desirable and often necessary due need for, e.g., removing program bugs adding functionalities multi-task network. A sound scheme be both loss-resilient attack-resilient, which crucial for deployed lossy hostile environments. To best our knowledge, no existing simultaneously satisfies requirements. This paper fills this gap with design...

Cloud storage system can reshape the way how kinds of contents are generated, stored and distributed on today's Internet. It is intriguing to study service provision cloud for sake providing global users with satisfactory service. This paper conducts modeling analysis a system, proposes Markov decision process framework analyze reliability system. Based analysis, optimal strategy be got after executing two solution algorithms. By incorporating these techniques into design, authors...

This paper proposes a single-site positioning method for vehicular ad hoc network localization in urban canyon scenarios, where the global navigation satellite system does not provide required accuracy. The proposed uses high-resolution estimations of both direction-of-arrival (DOA) and propagation path length (PL) to determine vehicle position. First, frequency-domain estimation signal parameters via rotational invariance technique algorithm is presented get multipath DOA estimates, by...

This paper presents a vehicle positioning method based on joint estimation of time arrival (TOA) and direction (DOA) with Vehicle-to-Roadside (V2R) communications. By analyzing the measured channel frequency response (CFR) between vehicles roadside unit (RU), enhanced two-dimensional matrix pencil (2-D MP) algorithm is implemented to design parameter estimator, which has lower complexity without forming covariance matrix. The position coordinates can then be calculated from estimates. To...

The white-box implementation of cryptography algorithm can hide key information even in the attack context owing to means obfuscation. However, under deliberately designed attack, there is still a risk being recovered within certain time complexity. In this paper, lightweight nonlinear SM4 proposed prevent several typical attacks from extracting secret key, which hides encryption and decryption process obfuscated lookup tables. Aiming improve diversity ambiguity tables as well resist...

In a cloud storage system, the hardware equipments storing contents are located in many places and capabilities of them various. These realities draw big challenge to providing constant efficient service system's users. this paper, intrigued from features erasure coding, we design content delivery mechanism which can tolerate servers' failures, so that ensure reliability system while distributing efficiently. mechanism, users still retrieve an adequate number coded packets recover original...

The concept of universal network measurement environment (UNME) is proposed, which includes three entities, i.e., the name server, monitoring center and probe. architecture that entities follow called (UNM), consists layers. key technologies such as component management protocol, policy protocol cooperative layer are explored construction probe method how to change tools into UNM probes introduced. Finally, a real & system following illustrated, several applications built on it

This study proposes a decentralized sliding-mode and fault-tolerant control design for kind of heterogeneous multiagent systems which contains matched disturbances, actuator faults nonlinear interactions. The function the protocol are developed so that closed-loop can be asymptotically stable disturbances solved by adaptive estimated upper bounding law. Simulation results validate effectiveness proposed algorithm.

Mobile cloud provides smart phone users with unprecedented opportunities to enjoy the abundant computing and storage resources of computing. One viable scheme is offload computational intensive applications a mobile phone's agent in cloud, which could be implemented as thin virtual machine (VM), also termed clone, cloud. Due shared hardware components (e.g. memory bus CPU cache) among co-resident VMs, VM subject covert channel attacks may potentially leak information other VMs located same...

Elastic resource management is one of the key characteristics cloud computing systems. Existing elastic approaches focus mainly on single consumption such as CPU consumption, rarely considering comprehensively various features applications. Applications deployed a PaaS are usually heterogeneous. While sharing same resource, these applications quite different in consuming. How to deploy heterogeneous smallest size hardware thus becomes new research topic. In this paper, we take into...

Random terms in many natural and social science systems have distinct Markovian characteristics, such as Markov jump-taking values a finite or countable set, Wiener process-taking continuous set. In general, these can be seen Markov-process-driven systems, which used to describe more complex phenomena. this paper, discrete-time stochastic linear system driven by homogeneous process is studied, the corresponding quadratic (LQ) optimal control problem for solved. Firstly, relations between...

In vehicle ad‐hoc networks (VANETs), the full coverage of roadside units (RSUs) is not necessary with assistance dead reckoning (DR) for RSU‐based localisation. This study proposes an optimisation strategy RSUs deployment, which seeks optimal RSU layout ensuring best localisation accuracy a minimum number RSUs. With DR, first, average geometric dilution precision (GDOP) specific region derived through non‐linear recursive model. Then deployment formulated into problem, and objective as...

Abstract In order to accurately predict the cohesive of cement-soil and better reflect shear strength cement-soil, through indoor tests theoretical analysis, influence cement mixing ratio on unconfined compressive is discussed. commonly used range (5%-30%), prediction formula proposed. The model based age further established. results show that increase with curing age. There a good linear relationship between cohesion strength. Based nonlinear regression under multiple factors fits well test results.

In this paper, a multi-step vehicle driving behavior recognition method based on roadside millimeter-wave radar detecting trajectory data is proposed. The time and radial speed in are selected as characteristic parameters. By analyzing the parameters of vehicles, different behaviors classified. proposed marks judges single behaviors, continuous complete state RA (rapid acceleration), RD deceleration), GA (general GD CS (constant speed) by calculating acceleration, interval time, duration....