Способ организации связи на основе приоритетов для децентрализованной сети
The principles of communication in decentralized networks is reviewed. A desk review of existing methods of access to the airwaves in the nodes of the network and identifies their shortcomings related to electromagnetic compatibility. A way to exchange data with the priorities is proposed. The experiment results of the network is shown.
Provides an overview of the principles of organization of communication in decentralized wireless networks is reviewed. The scheme of the decentralized network and the timing diagram of data transfer between nodes are shown. Investigated the problem of ensuring the effectiveness of collaboration with a number of nodes in low-power networks and consider the possibility of using for this purpose a probabilistic network Protocol data-link layer. The analysis of the algorithm access to the environment in a decentralized network, presents its block diagram. Detail displayed blocks of the algorithm that determine when data transmission from the network node. Through computational experiments on a model of a decentralized network investigated of the dependence of the efficiency of the work of the algorithm access to the airwaves from such temporal characteristics as the delay before sending data and waiting period before attempting to send them. The most loaded time point identified in the network exchange. It is shown that the developed computer program allow to calculate the probable collisions in the air. Suggested hardware implementation of the algorithm based on microcontroller STM32F030F4P6 of ST Microelectronics and transceiver CC1101 of Texas Instruments.
The advancements in multi-core central processing units have attracted new designs ranging from mechanisms of packing higher number of transistors into the small space, new techniques for communications (e.g., wireless network on chips), or new methodologies for cooling the chip. The latter two design aspects are the focus of this paper, where a microfluidic system is utilized for performing both functions. The miniaturization of microfluidic channels makes it attractive to embed them into the chips to transport fluids that can remove the heat from the processor cores. The extension of the cooling purpose of on-chip microfluidic channels is done by integrating communication feature. The communication process is achieved by transporting fluid through the channel and injecting information through air droplets. Protocols for microfluidic communications are applied, including physical layer functionalities and medium access protocols. The protocol design takes into considerations various properties of the microfludics. Based on the proposed system, the tradeoffs between the data rate and its impact on the amount of heat that can be removed from the processor are evaluated. This system provides new forms of condensed processor design of the future, in which integration of multiple functionalities of microfluidic channel system embedded into multi-core processors.
Considered components of a decentralized network and options for the implementation of its components. Considered the basic principles for the design of nodes. An approach to the distribution of computing load node. A scheme of interaction between node elements. Reflected its main advantages.
Generalized error-locating codes are discussed. An algorithm for calculation of the upper bound of the probability of erroneous decoding for known code parameters and the input error probability is given. Based on this algorithm, an algorithm for selection of the code parameters for a specified design and input and output error probabilities is constructed. The lower bound of the probability of erroneous decoding is given. Examples of the dependence of the probability of erroneous decoding on the input error probability are given and the behavior of the obtained curves is explained.
The dynamics of a two-component Davydov-Scott (DS) soliton with a small mismatch of the initial location or velocity of the high-frequency (HF) component was investigated within the framework of the Zakharov-type system of two coupled equations for the HF and low-frequency (LF) fields. In this system, the HF field is described by the linear Schrödinger equation with the potential generated by the LF component varying in time and space. The LF component in this system is described by the Korteweg-de Vries equation with a term of quadratic influence of the HF field on the LF field. The frequency of the DS soliton`s component oscillation was found analytically using the balance equation. The perturbed DS soliton was shown to be stable. The analytical results were confirmed by numerical simulations.
Radiation conditions are described for various space regions, radiation-induced effects in spacecraft materials and equipment components are considered and information on theoretical, computational, and experimental methods for studying radiation effects are presented. The peculiarities of radiation effects on nanostructures and some problems related to modeling and radiation testing of such structures are considered.
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.