This article introduces a new approach in the field of network optimization based on Transmission Optimization Metric (TOM), which is aimed at improving traffic flow continuity and increasing the chances for traffic flow sustainability in a way that helps to minimize inter-packet gaps. The work is mainly focused on harsh transmission conditions in narrow-band networks. Finally, the presented approach has impact on better resource allocation as fewer attempts are necessary for successful completion of a transmission. A significant part of the article deals with parameterization of coefficients used by the TOM optimization method. Examples of analysis for several topologies of narrow-band wireless networks based on CSMA/CA and TDMA protocols are used to demonstrate various issues related to proper setting of parameters. The introduced TOM metric has the potential to become a standard for optimization, for example, in sensor networks that are characterized by the specific nature of data traffic.
This paper describes methods for theoretical modeling of inter-arrival time of impulse noise and presents a new model based on the application of general mathematical distributions, together with its implementation in MATLAB. It also discusses the suitability of this model for development and testing of digital communication systems intended for deployment on high-voltage power distribution lines.
The aim of the Object name services (ONS) project was to find a robust and stable way of automated communication to utilize name and directory services to support radio-frequency identification (RFID) ecosystem, mainly in the way that can leverage open source and standardized services and capability to be secured. All this work contributed to the new RFID services and Internet of Things (IoT) heterogeneous environments capabilities presentation. There is an increasing demand of transferred data volumes associated with each and every IP or non-IP discoverable objects. For example RFID tagged objects and sensors, as well as the need to bridge remaining communication compatibility issues between these two independent worlds. RFID and IoT ecosystems require sensitive implementation of security approaches and methods. There are still significant risks associated with their operations due to the content nature. One of the reasons of past failures could be lack of security as the integral part of design of each particular product, which is supposed to build ONS systems. Although we focused mainly on the availability and confidentiality concerns in this paper, there are still some remaining areas to be researched. We tried to identify the hardening impact by metrics evaluating operational status, resiliency, responsiveness and performance of managed ONS solution design. Design of redundant and hardened testing environment under tests brought us the visibility into the assurance of the internal communication security and showed behavior under the load of the components in such complex information service, with respect to an overall quality of the delivered ONS service.
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