The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper proposes an adaptive method to modify network delay caused by clock skew. First, we introduce the concept of end-to-end network delay, and then we propose a method which aims at eliminate the effect cause by the difference clock frequency. The method first denoises the data set to remove error points, and then uses Least Square Method to estimate the clock skew in distributed network. Finally,...
Platooning is an emergent vehicular application aiming at increasing road safety, efficiency and driving comfort. The cooperation between the vehicles in a platoon is achieved by the frequent exchange of periodic broadcast Cooperative Awareness Messages (CAMs) also known as beacons. CAM triggering conditions are drafted in the standard ETSI EN 302 637-2 and are based on the dynamics of an originating...
Clock skew minimization is an important topic in the design of synchronous sequential circuit. As the process technology scaling, the effect of process/voltage/temperature (PVT) variations on clock skew has become a serious concern. It is known that, during the post-silicon stage, adjustable delay buffers (ADBs) can be utilized to eliminate the clock skew. However, unless ADBs have a self-adjusting...
We present a scalable NDN-based conferencing architecture for conference control and management. Conference control functions are divided into individual service modules and are loaded into different control servers. Control servers are added into the control cluster as the number of parcitipants increases. Participants are allowed to register and receive variety of conference control services from...
This paper investigates the clock synchronization problem for Device-to-Device (D2D) communication without infrastructure. Employing affine models for local clocks, it is proposed a random broadcast based distributed consensus clock synchronization algorithm. In the absence of transmission delays, we theoretically prove the convergence of the proposed scheme, which is further illustrated by the numerical...
Dedicated short range communication (DSRC) has been allocated (3 EU, 7 US) dedicated channels at 5.9GHz for vehicular communications. Although resource allocations on the Control Channel (CCH) reserved for safety-related applications have been well investigated, efficient usage of the other Service Channels (SCH) has attracted less attention. In this paper, we propose the design of an asynchronous...
Wireless sensor network (WSN) is made up two or more interconnected sensor nodes wirelessly. These nodes may be deployed either in open or closed environment. As these nodes communicates wirelessly and deployed in open environment there are always threat of security of nodes as well as data communicated. In order to making secure communication over WSN there should be some security mechanism. In this...
Vehicular communications have become more and more popular as a way to increase the comfort and safety of the transportation systems. The IEEE 802.11p/1609.x protocol stack, also known as the Wireless Access in Vehicular Environment (WAVE), has attracted much attention from researches. A large number of literatures and simulation platforms have been proposed for the performance evaluation and enhancements...
In this paper, we consider a complex dynamical network with time-varying delays. We prove that the dynamical complex network is synchronized if the delays satisfy the linear matrix inequality. In addition, we analyze the synchronization of the given network based on the coupling configuration matrix and the delays of the synchronous target. Some simulations illustrate our theoretical results.
It is well-known that the interconnection of two or more dynamical systems leads to an increasing complexity of the overall system's behavior due to the effects induced by the emerging dynamics (in the presence or not of feedback loops) in strong interactions (sensing, communication) with the environment changes. One of the major problems appearing in such interconnection schemes is related to the...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.