Evaluation of Quality of Light-Waves considering Transmission Errors for Wireless Transmission System in CGHs

Voice over Internet Protocol (VoIP) is a telecommunications technology that is able to pass the communication service in Internet Protocol networks so as to allow communicating between users in an IP network. However VoIP technology still has weakness in the Quality of Service (QoS). VOPI weaknesses is affected by the selection of the physical servers used. In this research, VoIP is configured on Linux operating system with Asterisk as VoIP application server and integrated on a Raspberry Pi by using wired and wireless network as the transmission medium. Because of depletion of IPv4 capacity that can be used on the network, it needs to be applied to VoIP system using the IPv6 network protocol with supports devices. The test results by using a wired transmission medium that has obtained are the average delay is 117.851 ms, jitter is 5.796 ms, packet loss is 0.38%, throughput is 962.861 kbps, 8.33% of CPU usage and 59.33% of memory usage. The analysis shows that the wired transmission media is better than the wireless transmission media and wireless-wired.

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Design of embedded acoustic image acquisition system for wireless sensor network

Journal of Intelligent & Fuzzy Systems ◽

10.3233/jifs-219106 ◽

2021 ◽

pp. 1-8

Author(s):

Xiaoping Huang ◽

Fangyi Wen ◽

Zhongxin Wei

Keyword(s):

Transmission Rate ◽

Image Acquisition ◽

Transmission System ◽

Video Data ◽

Wireless Transmission ◽

Acquisition System ◽

Wireless Sensor ◽

Acoustic Image ◽

Image Acquisition System ◽

Embedded Image

In recent years, with the development of communication technology, embedded computing technology and sensor technology, it has become increasingly mature. Micro sensors with sensing, computing and communication capabilities have appeared in large numbers and developed rapidly, making wireless sensor networks widely used. People put forward higher requirements for the accuracy, reliability and flexibility of the image acquisition system. The image transmission system using analog technology not only has low image quality, but also has a serious waste of system resources, is not easy to form a complex network structure, and has poor functional scalability. In view of the actual needs of the current image acquisition and wireless transmission system, based on embedded technology, image acquisition, processing technology and network transmission technology, this paper proposes and designs a low-cost, high-reliability embedded image acquisition and wireless transmission system. Experimental tests show that this system has reasonable design, high video coding efficiency, good image continuity, stable operation, and basically realizes the display, storage and playback functions of the collected video data. Improve the transmission rate of the system and reduce the distortion caused by compression in terms of image compression. At the same time, it supports multiple image resolutions, frame rate options and multiple video formats, and the system’s transmission rate can adapt to the state of the network. This design fulfills the basic requirements of an embedded image acquisition system based on network technology, and provides a good foundation for the next development of a gigabit network-based image acquisition system.

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Design of Wireless Microwave Transmission System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.441.959 ◽

2013 ◽

Vol 441 ◽

pp. 959-962

Author(s):

Bin Wen Huang ◽

Yuan Jiao

Keyword(s):

Wireless Communication ◽

High Frequency ◽

Transmission System ◽

Wireless Transmission ◽

Broadband Wireless ◽

Microwave Transmission

As a high-frequency and broadband wireless transmission system [, wireless microwave transmission system plays an important role in wireless communication family, especially in newest WiMax and 4G technology. Wireless microwave transmission system can be separated by indoor unit (IDU) and outdoor unit (ODU). This paper is focused on the design of IDU and ODU.

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The Structure Design of Product Equipment for the Rigid PVC Crusting-Foam Plate

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.915-916.349 ◽

2014 ◽

Vol 915-916 ◽

pp. 349-355

Author(s):

Xiao Zhen Hu

Keyword(s):

Production Line ◽

Power Transmission ◽

Transmission System ◽

Structure Design ◽

Technical Level ◽

Line System ◽

Measurement And Analysis ◽

Rigid Pvc ◽

Cutting System

Through deeply research and analysis the extruding technology of PVC crusting-foam plate, several main equipments of the production line system such as extruder power transmission system, machine barrel, screw, cooling stereotypes system and traction cutting system are designed. The drawings of all components and parts are drawn by using AutoCAD and Pro/E soft. After the production line assembled, some related experiments, measurement and analysis are completed, and the results show that the quality of PVC plates produced by our production line attained to technical level of imported products.

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Quality of Service of Data Broadcasting Algorithms on Erroneous Wireless Channels

Handbook of Research on Mobile Multimedia, Second Edition ◽

10.4018/978-1-60566-046-2.ch029 ◽

2011 ◽

pp. 421-436

Author(s):

Paolo Barsocchi ◽

Alan A. Bertossi ◽

M. Cristina Pinotti ◽

Francesco Potortì

Keyword(s):

Quality Of Service ◽

Polynomial Time ◽

Wireless Channels ◽

Transmission Error ◽

Packet Transmission ◽

Optimal Solutions ◽

Bernoulli Model ◽

Data Scheduling ◽

Transmission Errors

Broadcasting is an efficient and scalable way of transmitting data over wireless channels to an unlimited number of clients. In this chapter the problem of allocating data to multiple channels is studied, assuming flat data scheduling per channel and the presence of unrecoverable channel transmission errors. The behavior of wireless channels is described by the Bernoulli model, in which each packet transmission has the same probability to fail and each transmission error is independent from the others. The objective is that of minimizing the average expected delay experienced by the clients. Optimal solutions can be found in polynomial time when all data items have unit lengths, while heuristics are presented when data items have non-unit lengths. Extensive simulations, performed on benchmarks whose item popularities follow Zipf distributions, show that good sub-optimal solutions are found.

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