scholarly journals ANALYSIS OF USER MOBILITY PERFORMANCE ON SOFTWARE DEFINED WIRELESS NETWORK USING DIJKSTRA ALGORITHM

2021 ◽  
Vol 2 (2) ◽  
pp. 127-133
Author(s):  
Icha Nurlaela Khoerotunisa ◽  
Sofia Naning Hertiana ◽  
Ridha Muldina Negara
Keyword(s):  
Wireless Network ◽  
Packet Loss ◽  
Network Performance ◽  
User Mobility ◽  
Dijkstra Algorithm ◽  
High Complexity ◽  
Quality Of Data ◽  
Data Packets ◽  
Mobility Performance

  Over the last decade, wireless devices have developed rapidly until predictions will develop with high complexity and dynamic. So that new capabilities are needed for wireless problems in this problem. Software Defined Network (SDN) is generally a wire-based network, but to meet the needs of users in terms of its implementation, it has begun to introduce a Wireless-based SDN called Software Defined Wireless Network (SDWN) which provides good service quality and reach and higher tools, so as to be able to provide new capabilities to wireless in a high complexity and very dynamic. When SDN is implemented in a wireless network it will require a routing solution that chooses paths due to network complexity. In this paper, SDWN is tested by being applied to mesh topologies of 4,6 and 8 access points (AP) because this topology is very often used in wireless-based networks. To improve network performance, Dijkstra's algorithm is added with the user mobility scheme used is RandomDirection. The Dijkstra algorithm was chosen because it is very effective compared to other algorithms. The performance measured in this study is Quality of Service (QoS), which is a parameter that indicates the quality of data packets in a network. The measurement results obtained show that the QoS value in this study meets the parameters considered by the ITU-T G1010 with a delay value of 1.3 ms for data services and packet loss below 0.1%. When compared with the ITU-T standard, the delay and packet loss fall into the very good category.

scholarly journals Analysis and Testing of Data Transmission of Providers in Indonesia using GSM and CDMA Modem

2018 ◽  
Vol 6 (1) ◽  
pp. 13
Author(s):  
Fani Rakhman Hakim ◽  
Bambang Sugiantoro
Keyword(s):  
Packet Loss ◽  
Data Transmission ◽  
Data Transfer ◽  
Data Gathering ◽  
Quality Of Data ◽  
Throughput Time ◽  
Time Jitter ◽  
Non Local

The technology of internet nowadays has become most important aspect and becomes primary need for certain group of peoples who work in some field like education,economy,health,etc. One of the biggest problem which mostly brought by so many people is speed in data transfer. This paper emphasize in directly testing the quality of data transmission from each transmission technology. The equipment used by this paper is ZTE Join Air help, the simcard provided by Telkomsel,XL, and indosat, while CDMA technology used simcard provided by smartfren and esia and modem provided by Smartfren which its series is EC176-2. The parameters used for testing in this paper are throughput, time, jitter dan packet loss. this paper used data gathering method, for each operator and the testing used by this paper is downloading some files from local and non local server, then comparing parameter value between operators.

scholarly journals A model of the process of package delivering over a data transmission channel in the context of computer attacks by an intruder

2021 ◽  
Vol 2021 (2) ◽  
pp. 229-241
Author(s):  
Vera L. LUKICHEVA ◽  
◽  
Andrey A. PRIVALOV ◽  
Daniil D. TITOV ◽  
◽  
...  
Keyword(s):  
Data Transmission ◽  
Random Variables ◽  
Distribution Functions ◽  
Quality Of Data ◽  
Attack Model ◽  
Transmission Channels ◽  
Performance Quality ◽  
Computer Attacks ◽  
The Impact

Objective: To analyze the impact of computer attacks on the performance quality of data transmission channels and channeling systems. It is also necessary to take into account the capabilities of an intruder to introduce malware into channeling systems when committing a computer attack. Methods: To determine the required design ratios, several options for setting various distribution functions characterizing the parameters used as input data and types of inbound streams have been considered, taking into account the parameters of the intruder’s computer attack model set by the values of the probability of successful attack. Mathematical modeling is carried out using the method of topological transformation of stochastic networks. The exponential, momentum and gamma distributions are considered as distribution functions of random variables. The solutions are presented for inbound streams corresponding to the Poisson, Weibull, and Pareto models. Results: The proposed approach makes it possible to assess the performance quality of data transmission channels in the context of computer attacks. These assessments make it possible to analyze the state and develop guidelines for improving the performance quality of communication channels against the destructive information impact of the intruder. Various variants of the functions of random variables distribution and various types of the inbound stream were used for modeling, making it possible to compare them, as well as to assess the possibility of using them in channels that provide users with different services. Practical importance: The modeling results can be used to build communication management decision support systems, as well as to detect attempts of unauthorized access to the telecommunications resource of transportation management systems. The proposed approach can be applied in the development of threat models to describe the capabilities of the intruder (the ‘Intruder Model’).

scholarly journals Application of Diversity Combining with RLS Adaptive Filtering in Data Transmission in a Hydroacoustic Channel

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7255
Author(s):  
Agnieszka Czapiewska ◽  
Andrzej Luksza ◽  
Ryszard Studanski ◽  
Andrzej Zak
Keyword(s):  
Least Squares ◽  
Adaptive Filtering ◽  
Data Transmission ◽  
Intersymbol Interference ◽  
Multipath Propagation ◽  
Recursive Least Squares ◽  
Diversity Combining ◽  
Quality Of Data ◽  
Transmission Parameters

When transmitting data in a hydroacoustic channel under difficult propagation conditions, one of the problems is intersymbol interference (ISI) caused mainly by the effect of multipath propagation. This phenomenon leads to a decrease in transmission parameters, and sometimes completely prevents it. Therefore, we have made an attempt to use diversity combining with Recursive Least Squares (RLS) adaptive filtering to improve the quality of data transmission in a hydroacoustic channel with strong reflections. The method was tested in simulation and during measurements in a real environment. The influence of the method on data transmission in the hydroacoustic channel was examined in detail. The obtained results allow us to draw conclusions regarding the purposefulness of use of diversity combining and RLS adaptive filtering in order to improve the quality of data transmission by reducing the effect of ISI.

scholarly journals Reduction of the Multipath Propagation Effect in a Hydroacoustic Channel Using Filtration in Cepstrum

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 751 ◽  
Author(s):  
Agnieszka Czapiewska ◽  
Andrzej Luksza ◽  
Ryszard Studanski ◽  
Andrzej Zak
Keyword(s):  
Data Transmission ◽  
Multipath Propagation ◽  
Propagation Effect ◽  
Quality Of Data ◽  
Multipath Effect ◽  
Channel One ◽  
Real Environment ◽  
Transmission Parameters ◽  
Cepstral Analysis

During data transmission in a hydroacoustic channel, one of the problems is the multipath propagation effect, which leads to a decrease in the transmission parameters and sometimes completely prevents it. Therefore, we have attempted to develop a method, which is based on a recorded hydroacoustic signal, that allows us to recreate the original (generated) signal by eliminating the multipath effect. In our method, we use cepstral analysis to eliminate replicas of the generated signal. The method has been tested in simulation and during measurements in a real environment. Additionally, the influence of the method on data transmission in the hydroacoustic channel was tested. The obtained results confirmed the usefulness of the application of the developed method and improved the quality of data transmission by reducing the multipath propagation effect.

Data Transmission Based on Guaranteeing QoS in Broadband Access Networks

2011 ◽  
Vol 225-226 ◽  
pp. 194-198
Author(s):  
Yan Zhang ◽  
Wen Yu Yu
Keyword(s):  
Packet Loss ◽  
Data Transmission ◽  
Access Networks ◽  
Cable Modem ◽  
Broadband Access ◽  
Quality Of Data ◽  
Transmission Scheme ◽  
Broadband Access Networks ◽  
Research Perspective

For the unsymmetrical bandwidth in HFC network, this paper proposes a data transmission scheme of Cable Modem based on DOCSIS1.1. This scheme can meet different kinds of data’s demands. It can guarantee fine grading data transmission management and low ratio of packet loss. Then, this paper proves the validity of the scheme. Lastly, in order to improve the quality of data transmission, it gives the difficulties and research perspective in the future.

scholarly journals Telemedicine and International Disaster Response: Medical Consultation to Armenia and Russia Via a Telemedicine Spacebridge

1993 ◽  
Vol 8 (1) ◽  
pp. 57-66 ◽  
Author(s):  
Bruce A. Houtchens ◽  
Terry P. Clemmer ◽  
Harry C. Holloway ◽  
Alexander A. Kiselev ◽  
James S. Logan ◽  
...  
Keyword(s):  
Data Transmission ◽  
Disaster Response ◽  
Gas Explosion ◽  
Quality Of Data ◽  
Medical Problems ◽  
Medical Centers ◽  
Treatment Plans ◽  
Audio Video ◽  
Russian Medical

AbstractIntroduction:The Telemedicine Spacebridge, a satellite-mediated, audio-video-fax link between four United States and two Armenian and Russian medical centers, permitted remote American consultants to assist Armenian and Russian physicians in the management of medical problems following the December 1988 earthquake in Armenia and the June 1989 gas explosion near Ufa.Methods:During 12 weeks of operations, 247 Armenian and Russian and 175 American medical professionals participated in 34 half-day clinical conferences. A total of 209 patients were discussed, requiring expertise in 20 specialty areas.Results:Telemedicine consultations resulted in altered diagnoses for 54, new diagnostic studies for 70, altered diagnostic processes for 47 and modified treatment plans for 47 of 185 Armenian patients presented. Simultaneous participation of several US medical centers was judged beneficial; quality of data transmission was judged excellent.Conclusion:These results suggest that interactive consultation by remote specialists can provide valuable assistance to on-site physicians and favorably influence clinical decisions in the aftermath of major disasters.

scholarly journals A Chinese Remainder Theorem Based Enhancements of Lempel-ziv-welch and Huffman Coding Image Compression

2019 ◽  
pp. 1-9
Author(s):  
M. B. Ibrahim ◽  
K. A. Gbolagade
Keyword(s):  
Data Transmission ◽  
Chinese Remainder Theorem ◽  
Signal To Noise Ratio ◽  
Huffman Coding ◽  
Quality Of Data ◽  
Redundancy Removal ◽  
Large Size ◽  
Compression Time ◽  
Speed Up

Data size minimization is the focus of data compression procedures by altering representation and reducing redundancy of information to a more effective kind. In general, lossless approach is favoured by a number of compression methods for the purpose of maintaining the content integrity of the file afterwards. The benefits of compression include saving storage space, speed up of data transmission and high quality of data. This paper observes the effectiveness of Chinese Remainder Theorem (CRT) enhancement in the implementation of Lempel-Ziv-Welch (LZW) and Huffman coding algorithms for the purpose of compressing large size images. Ten images of Yale database was used for testing. The outcomes revealed that CRT-LZW compression saved more space and speedy compression (or redundancy removal) of original images to CRT-Huffman coding by 29.78% to 14.00% respectively. In terms of compression time, CRT-LZW approach outperformed CRT-Huffman approach by 9.95 sec. to 19.15 sec. For compression ratio, CRT-LZW also outperformed CRT-Huffman coding by 0.39 db to 4.38 db, which is connected to low quality and imperceptibility of the former. Similarly, CRT-Huffman coding (28.13db) offered better quality Peak-Signal-to-Noise-Ratio (PSNR) for the reconstructed images when compared to CRT-LZW (3.54db) and (25.59db) obtained in other investigated paper.

scholarly journals Synthesis method of circulant polynomial encoding matrices for the implementation of code-division multiplexing

2021 ◽  
Vol 2094 (3) ◽  
pp. 032067
Author(s):  
P O Vinar ◽  
S V Rabin ◽  
A V Rabin
Keyword(s):  
Data Transmission ◽  
Communication Systems ◽  
Multiple Access ◽  
Synthesis Method ◽  
Quality Of Data ◽  
Coverage Area ◽  
Radiated Power ◽  
Radio Transmitters ◽  
Code Division Multiplexing

Abstract The method of the synthesis of circulant polynomial matrices for the implementation of the operation of code combining of channels on the transmitting side of the communication system has been developed. The structure of these matrices is the basis for reducing the complexity of encoder schemes and, consequently, the radiated power of radio transmitters of subscriber devices. The research results can be applied in communication systems with multiple access, with a wide coverage area, high quality of data transmission, high noise immunity, stability of communication channels from interception and eavesdropping.

scholarly journals The Impact of Smart Glasses on a New Generation of Users

2021 ◽  
Vol 2 (4) ◽  
pp. 1-25
Author(s):  
Qi Yutong ◽  
Ju Hang ◽  
Jing Rui Chen ◽  
P. S. Joseph Ng
Keyword(s):  
Data Transmission ◽  
Early Stage ◽  
Smart Phone ◽  
Quality Of Data ◽  
Stage Of Development ◽  
Smart Glasses ◽  
New Generation ◽  
The Impact ◽  
Near Future

The intelligent glasses are similar to the smart phone, which possess independent operational system. And it can use diverse functions and applications by installing software, Meanwhile the intelligent glasses also are regarded as one of popular intelligent equipment in the resent years. The intelligent glasses are in an early stage of development, So there are some core hardware and application field, which still be researching and exploring continually, But its development will be quite rapid and the scale of market also is expanding continually in near future. The intelligent glasses have a more higher requirement for the quality of data transmission. With the advent of 5G time, The experience and significance of intelligent glasses will be increase sharply.

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