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Hybrid Broadcast Broadband TV (HbbTV) is an industry standard for hybrid multimedia devices that are able to combine broadcast and IPTV delivery. This paper deals with companion screen devices, companion screen applications and communication of those applications with HbbTV terminal and its applications. Companion screen devices offer additional content to user and for pleasant experience communication...
High quality of the provided communication services can be reached by package networks by the organization of network synchronization of the time scales (TS). The report summarizes the experience of comparing the TS of the leading watches of the corporate telecommunication network with the state time scale - UTC (SU). The methods of realization of checking of a time scale and methods of distribution...
This paper proposes an event detection module for distributed denial of service (DDoS) attacks on Internet of Things (IoT). Different from existing detection modules using knowledge-based filtering, the proposed module focuses on the system behavior under DDoS attacks and detects it utilizing information obtained from NTP used in synchronization service. We conducted demonstration experiments with...
ITER control system model (ICM) is a currently developed simulation platform for control, data access, and communication (CODAC), which is a central control system responsible for integrating and controlling all plant systems of ITER. ICM is a large-scale implementation of CODAC that follows hardware and software standards but does not have any interfaces to other physical components of ITER. ICM...
The increased popularity of social media and mobile devices has radically changed the way people consume multimedia content online. As an example, users can experience the same event (e.g. a sports event or a concert) together using social media, even if they are not in the same physical location. Moreover, the introduction of the HTTP Adaptive Streaming principle has made it possible to deliver video...
Current IoT protocols, like the Constrained Application Protocol (CoAP), do not yet provide real-time behavior for the inter-device communication. In this paper, we propose a real-time extension for the CoAP standard that defines interfaces for the time synchronization among nodes and the time slot management. These interfaces enable a controlled exclusive network access based on a Time Division Multiple...
We developed a push-content delivery method for integrated broadcasts on the Internet. To provide services that are highly synchronized between the broadcast programs and push content, we propose a new push-content delivery method that enables simultaneous reception of push content on all terminals.
CAN (Controller Area Network) and TIA-485 are two of the most used standards in fieldbus systems. While CAN ISO IS-11898 includes complete data link layer specifications on top of its physical layer, TIA-485 only addresses the physical layer of the 7-layer OSI model. Other communication parameters like speed, format, and data transmission protocol are not specified by RS-485 in order to provide interoperability...
Due to the high complexity in software hierarchy and the shared queue & lock mechanism for synchronized access, existing I/O stack for remote target access in FCoE-based SAN storage becomes a performance bottleneck, thus leading to a high I/O overhead and limited I/O scalability in multi-core servers. For scalable performance, existing works focus on improving the efficiency of lock algorithm...
Although the great success and the popularity of Cloud computing, an important number of challenges and threats are inherent to this new computing paradigm. One of the serious challenges in Cloud service architecture is managing authentication. Our goal in this paper is to present a flexible authentication solution based on TLS standard and asynchronous one time password mechanism. Our purpose is...
Several mobile-enabled solutions for education transformation have been deployed in Africa. Drawbacks of these systems include, a predominant focus on disseminating bulk learning content, student outcomes are measured solely on quantitative performance metrics, a lack of instrumentation to capture fine-grained user interaction data, and finally none of them seem to focus on capturing the contextual...
Abstract- Cloud computing is a promising next generation computing paradigm which offers significant economic benefits to both commercial and public entities. Due to the unique combination of characteristics that cloud computing introduce, including; on-demand self-service, broad network access, resource pooling, rapid elasticity and measured service, digital investigations face various technical,...
Smart transducers based on the IEEE 1451 standard provide platform for development of distributed measurement and control systems. Integration of IEEE 1451 services based on Service Oriented Architecture (SOA) enables simple implementation, interoperability, scalability of distributed system components, accessible in the form of network services. Addressing the transport latency and packet loss in...
Unmanned sale is widely adopted in Japan as a way of direct sales of agricultural products. It has, however, problems that change is not handled, receipts are not issued, deferred payment is not acceptable, and all sales management must be done by farmers themselves. The UAPS (Unmanned Agricultural Product Sales) system aims to solve these problems. We completed development of an implementation for...
With the increasingly widespread application of cloud computing, multiple cloud storage platforms have emerged, such as Dropbox, GoogleDrive, OneDrive, etc. These synchronization technology tools are based on specific platform and vary in time synchronization, bandwidth, file types and working offline synchronization capabilities. Most of them are facing time delay, bandwidth overhead problems. Based...
CANopen is an increasingly popular protocol for the design of networked embedded systems. Nonetheless, the large variety of communication and network management functionalities supported in CANopen can increase significantly systems complexity and in turn, the needs for system validation at design time. We present hereafter a rigorous method based on formal modeling and verification techniques, allowing...
Massively multiplayer online (MMO) games consist of huge worlds populated by thousands of clients, far beyond the ability of a single server to maintain. This naturally leads to the division of the game world into many partitions, each controlled by a single server. To provide players with the illusion of a single large world, some MMO systems divide their game world across servers and synchronize...
In this paper, an efficient and accurate two-layer standard time distribution architecture is proposed to implement digital time traceability. First, the system uses a clock calibration procedure based on two-way time transfer over a general dialup telephone modem and achieves a couple of milliseconds accuracy. Second, the system uses a delegation time stamping procedure that employs a forward secure...
The IEC 61499 standard defines function blocks with which distributed control applications may be developed, and how these are interpreted and executed. With the distributed nature of the control application, many issues also need to be taken into account. In this paper we propose a replication management framework for IEC 61499 applications, and discuss some mechanisms and protocols that may be used...
In the past decade, new communication schemes have been designed and retrofitted into substations by utilities to integrate data from relays and intelligent electronic devices (IEDs). The idea of standardising the language of communication between IEDs has evolved as the key for the advancement of connectivity and interoperability within a substation automation system. As a result of the standardization...
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