Monitoring the quality of speech in the communication system BESIP

2012 ◽  
Author(s):  
Karel Tomala ◽  
Lukas Macura ◽  
Miroslav Voznak ◽  
Jiri Vychodil
Keyword(s):  
Communication System

SIMULATION OF DIRECT SPREAD SPECTRUM COMMUNICATION SYSTEM ON THE HARDWARE MODULE EMONA DATEX. EVALUATION OF THE EFFECT OF NOISE ON THE QUALITY OF DEMODULATION

2019 ◽  
Author(s):  
Maksim Zhmakin ◽  
Irina Chadyuk ◽  
Aleksey Nadymov
Keyword(s):  
Spread Spectrum ◽  
Communication System ◽  
Spread Spectrum Communication ◽  
Direct Spread ◽  
Simulation Results

A variant of implementation of a communication system with direct spread spectrum is presented in this article, simulation results are also presented, the main parameters of the system are taken, and conclusions are drawn.

scholarly journals Design of PBX IP VoIP Server in State Polytechnic of Malang Network Based on Single Board Circuit

2017 ◽  
Vol 4 (1) ◽  
pp. 15-22
Author(s):  
Arinta Fadlil Fajar Wicaksono
Keyword(s):  
Operating System ◽  
Packet Loss ◽  
Communication System ◽  
Communication Quality ◽  
Communication Services ◽  
Cpu Usage ◽  
Bandwidth Capacity

Building VoIP technology requires a server called Elastix. Singleboard circuit device can be an alternative to cover the shortcomings of a PC as a VoIP server, to support practicum activities. The specifications for the quad-core processor and 1GB LPDDR2 memory are expected to be able to provide access to the latest version of the operating system to be able to produce better communication quality as I PPBX. This study designed a VoIP IP PBX server communication system at the Polinema Telecommunication Laboratory using the Elastix Linux operating system, to determine the quality of VoIP communication services and the performance of a single board circuit as an IPPBX server. The results of the research are 64 kbps bandwidth capacity capable of serving a customer capacity of 181 subscribers through 8 number of channels. QoS measurement obtained a delay value of 4.87091 ms; jitter of 18,265ms; packet loss of 0.71%; throughput of 0.2747 Mbit / sec. The singleboard circuit server is capable of serving VoIP communications for as many as 20 users and 10 calls simultaneously on the same server with a cpu usage percentage of 17.7% and 17.2% cpu usage, when communicating with other servers.

Quality of Perception in M-Commerce

2011 ◽  
pp. 284-302 ◽  
Author(s):  
G. Ghinea ◽  
M. C. Angelides
Keyword(s):  
Quality Of Service ◽  
Recent Work ◽  
User Experience ◽  
Communication System ◽  
Multimedia Applications ◽  
Perceptual Quality ◽  
Network Bandwidth ◽  
Shopping Experience ◽  
Business To Consumer

In an m-commerce setting, the underlying communication system will have to provide a quality of service (QoS) in the presence of two competing factors—network bandwidth and, as the pressure to add value to the business-to-consumer (B2C) shopping experience by integrating multimedia applications grows, increasing data sizes. In this chapter, developments in the area of QoS-dependent multimedia perceptual quality are reviewed and are integrated with recent work focusing on QoS for e-commerce. Based on previously identified user perceptual tolerance to varying multimedia QoS, we show that enhancing the m-commerce B2C user experience with multimedia, far from being an idealised scenario, is in fact feasible if perceptual considerations are employed.

Mission-Aware Adaptive Communication for Collaborative Mobile Entities

2011 ◽  
pp. 1056-1076 ◽  
Author(s):  
Jérôme Lacouture ◽  
Ismael Bouassida Rodriguez ◽  
Jean-Paul Arcangeli ◽  
Christophe Chassot ◽  
Thierry Desprats ◽  
...  
Keyword(s):  
Forest Fires ◽  
Communication System ◽  
Resource Constraints ◽  
New Concepts ◽  
Wireless Environment ◽  
First Results ◽  
Collaborative Activities ◽  
Human Actors ◽  
Communication Resource

Adaptation of communication is needed to maintain the connectivity and quality of communication in group-wide collaborative activities. This becomes quite a challenge to handle when mobile entities are part of a wireless environment, in which responsiveness and availability of the communication system are required. In this chapter, these challenges are addressed within the context of the ROSACE project where mobile ground and flying robots have to collaborate either between them selves or with remote artificial and human actors during save and rescue missions in the event of disasters such as forest fires. This chapter presents our first results. The final goal is to propose new concepts, models and architectures that supports cooperative adaptation which is aware of the mission being executed. Thus, the communication system can be adequately adapted in response to predictable or unpredictable evolutions of the activity requirements and to the unpredictable changes in the communication resource constraints.

Construction Method of Virtual Network Communication System Based on UDP Protocol

2014 ◽  
Vol 687-691 ◽  
pp. 3818-3821
Author(s):  
Zhi Zhang
Keyword(s):  
Service Quality ◽  
Error Rate ◽  
Data Transmission ◽  
Communication System ◽  
Construction Method ◽  
Virtual Network ◽  
Network Communication ◽  
Communication Problems ◽  
Simulation Results

The virtual network communication system and its construction method is researched, the service quality of the virtual network communication is improved. In view of the virtual network communication problems, the construction method of virtual network communication system is proposed based on UDP protocol. The communication system, it needs to build the UDP protocol. The protocol is taken as the virtual network communication platform, and the data transmission of virtual network communication is completed. Simulation results show that the improved algorithm is applied in the virtual network communication, the virtual network communication system is constructed, and the error rate can be effectively reduced, the efficiency of communication is improved, and it can meet the actual needs of users.

scholarly journals Coordinación para la intervención en los problemas de comunicación de niños con necesidades de at: un estudio preliminar de necesidades

2021 ◽  
Vol 2 (5) ◽  
pp. 6535-6557
Author(s):  
Alba Rodríguez Capdepón ◽  
Ángela Pérez Lencina ◽  
María Moreno Ruiz
Keyword(s):  
Early Childhood ◽  
Early Intervention ◽  
Communication System ◽  
Research Work ◽  
Research Practice ◽  
Qualitative And Quantitative ◽  
Childhood Education ◽  
Communication Problems ◽  
Mixed Approach

En el ámbito de la Atención Temprana, existe la discusión en cuanto al nivel y la calidad de la coordinación existente entre los principales implicados en los procesos de intervención. Es por ello, que el principal objetivo de este artículo es analizar el nivel y la calidad de coordinación entre los centros de Atención Temprana, los centros de Educación Infantil y las familias que tienen un niño con problemas de comunicación para cuya mejora puede ser conveniente implementar un sistema aumentativo de comunicación. Para poder llevar a cabo este artículo de investigación, se ha elaborado un estudio de enfoque mixto exploratorio secuencial, con el propósito de obtener una complementariedad paradigmática y metodológica. Se ha realizado una búsqueda empírica sobre la bibliografía que trata esta problemática, y después se ha elaborado el planteamiento de tres métodos de investigación de enfoque cualitativo y cuantitativo. Se ha elaborado una aproximación de los resultados que podrían haberse obtenido de haber llevado a cabo la práctica de investigación, y se han obtenido unas conclusiones al respecto. La situación de Covid19 que estamos atravesando ha impedido la puesta en práctica de esta investigación, llevándonos a plantear posibles escenarios que podrían haberse dado de haber sido posible la realización de este artículo. Sin embargo, hemos podido concluir que existe una coordinación entre estos agentes implicados, pero es demasiado escasa y no se da con la frecuencia que debería, y, por lo tanto, sería conveniente tener en cuenta esta insuficiente coordinación para posibles futuras intervenciones.   In the field of Early Intervention, there is a controversy regarding the level and quality of the coordination between the main members involved in the intervention processes. For this reason, the main objective of this work is to analyze the level and quality of coordination between Early Intervention centers, Early Childhood Education centers, and families who have a child with communication problems, for whose improvement it may be convenient to implement an augmentative communication system. In order to carry out this research work, a sequential exploratory mixed approach study has been developed, with the purpose of obtaining a paradigmatic and methodological complementarity. We have done an empirical research on the bibliography that deals with this problem, and then, the approach of three research methods with a qualitative and quantitative approach has been elaborated. We have done an approximation of the results that could have been obtained from having carried out the research practice, and some conclusions have been obtained in this regard. The Covid19 situation that we are going through has made it impossible to put this investigation into practice, leading us to propose possible scenarios that could have occurred had it been possible to carry out this work. However, we have concluded that there is coordination between these agents involved, but it is too scarce and does not occur as often as it should, and, therefore, it would be convenient to take into account this insufficient coordination for possible future interventions.

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