scholarly journals Optimization of Log-Periodic TV Reception Antenna with UHF Mobile Communications Band Rejection

Electronics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1830
Author(s):  
Keyur K. Mistry ◽  
Pavlos I. Lazaridis ◽  
Zaharias D. Zaharis ◽  
Ioannis P. Chochliouros ◽  
Tian Hong Loh ◽  
...  
Keyword(s):  
Quality Of Service ◽  
Mobile Communications ◽  
Lower Cost ◽  
Mobile Services ◽  
Poor Quality ◽  
Antenna Design ◽  
Log Periodic Antenna ◽  
4G Lte ◽  
Tv Broadcasting

The coexistence of TV broadcasting and mobile services causes interference that leads to poor quality-of-service for TV consumers. Solutions usually found in the market involve external band-stop filters along with TV reception log-periodic and Yagi-Uda antennas. This paper presents a log-periodic antenna design without additional filtering that serves as a lower cost alternative to avoid interference from mobile services into the UHF TV. The proposed antenna operates in the UHF TV band (470–790 MHz-passband) and rejects the 800 MHz and 900 MHz bands (stopband) of 4G/LTE-800 and GSM900 services, respectively. Matching to 50 Ohms is very satisfactory in the passband with values of S11 below −12 dB. Furthermore, the antenna is highly directive with a realized gain of approximately 8 dBi and a front-to-back ratio greater than 20 dB.

scholarly journals A Hybrid Approach to Call Admission Control in 5G Networks

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Mohammed Al-Maitah ◽  
Olena O. Semenova ◽  
Andriy O. Semenov ◽  
Pavel I. Kulakov ◽  
Volodymyr Yu. Kucheruk
Keyword(s):  
Artificial Intelligence ◽  
Quality Of Service ◽  
Admission Control ◽  
Mobile Communications ◽  
Communication Systems ◽  
Call Admission Control ◽  
Hybrid Approach ◽  
5G Networks ◽  
Call Admission

Artificial intelligence is employed for solving complex scientific, technical, and practical problems. Such artificial intelligence techniques as neural networks, fuzzy systems, and genetic and evolutionary algorithms are widely used for communication systems management, optimization, and prediction. Artificial intelligence approach provides optimized results in a challenging task of call admission control, handover, routing, and traffic prediction in cellular networks. 5G mobile communications are designed as heterogeneous networks, whose important requirement is accommodating great numbers of users and the quality of service satisfaction. Call admission control plays a significant role in providing the desired quality of service. An effective call admission control algorithm is needed for optimizing the cellular network system. Many call admission control schemes have been proposed. The paper proposes a methodology for developing a genetic neurofuzzy controller for call admission in 5G networks. Performance of the proposed admission control is evaluated through computer simulation.

scholarly journals Topology Control for Resource Management in Microwave Backhaul Networks

2021 ◽  
Author(s):  
◽  
Alexander Deng
Keyword(s):  
Quality Of Service ◽  
Cost Effectiveness ◽  
Topology Control ◽  
Reducing Power ◽  
Poor Quality ◽  
Optimal Topology ◽  
Core Networks ◽  
Backhaul Networks ◽  
New Algorithms

<p>Microwave backhaul networks are the dominant technology used to connect together access and core networks for their flexibility and cost-effectiveness in deployment. Unfortunately, microwave backhaul networks are susceptible to interference and are statically managed leading to poor Quality of Service (QoS) in the form of high delays and loss as well as being inefficient on energy. The use of Software Defined Networking (SDN) is proposed to address these problems by dynamically managing resources to work around the interference and remove static allocations. Two new algorithms, CUT and OptiCUT were designed to compute an optimal topology, to minimise loss and delay while at the same time reducing power consumption.</p>

scholarly journals A novel method for the codecs’ performance analysis in mobile telephony systems

2020 ◽  
Vol 33 (2) ◽  
pp. 243-259
Author(s):  
Aleksandar Lebl ◽  
Dragan Mitic ◽  
Vladimir Matic ◽  
Mladen Mileusnic ◽  
Zarko Markov
Keyword(s):  
Quality Of Service ◽  
Flow Rate ◽  
Mobile Communications ◽  
Voice Quality ◽  
Mobile Telephony ◽  
Mobile Telecommunication ◽  
Telecommunication System ◽  
Full Rate ◽  
Novel Method

This paper presents a novel method of expressing the quality of service in a mobile telecommunication system when its performance depends on several factors including applied codecs? characteristics (voice quality and data flow rate) and telecommunications traffic service possibilities. The influence of these factors is unified in one variable - quality of service measure. The proposed method is especially applicable in the cases when two-dimensional systems are analyzed - for example when two codecs with different flow rate and different achievable connection quality are used in a system. As an example, we also studied system with full-rate or mixed full-rate and half-rate codec implementation depending on the offered traffic. The system performances - mean dataflow and mean connection quality as a function of offered traffic are presented graphically and also expressed quantitatively by the novel quality of service measure. The systems with different number of available traffic channels may be compared on the base of this novel evaluation value such that the system with the highest value is the most suitable one for the concrete situation. In this way mobile system design is simplified to the great extent. The developed model is applicable generally for mobile telephony systems defining, but in this paper we studied its implementation for Global System for Mobile communications.

scholarly journals Analisis Sentimen pada Opini Pengguna Maskapai Penerbangan Menggunakan Hybrid Cuckoo Search

2019 ◽  
Vol 6 (3) ◽  
pp. 321
Author(s):  
Nanang Fakhrur Rozi ◽  
Fandi Arianto ◽  
Dian Puspita Hapsari
Keyword(s):  
Quality Of Service ◽  
Sentiment Analysis ◽  
Cuckoo Search ◽  
Poor Quality ◽  
Quality Of Services ◽  
Airline Passenger ◽  
Group Information ◽  
Short Time

<p>Tingginya minat penggunaan pesawat terbang dipengaruhi oleh tingginya tingkat mobilitas masyarakat yang menuntut perpindahan kota dalam waktu yang singkat. Meski demikian, tidak semua maskapai penerbangan mampu memberikan layanan yang memuaskan bagi konsumennya. Kualitas layanan yang diberikan oleh suatu maskapai, baik dari segi keselamatan, keamanan, maupun kenyamanan, umumnya dapat diketahui melalui opini penumpang lainnya. Banyaknya opini negatif yang didapat oleh maskapai mengindikasikan buruknya kualitas layanannya, begitu pula sebaliknya. Akan tetapi, jumlah opini yang semakin hari semakin meningkat menyebabkan sulitnya konsumen dalam menilai kualitas maskapai secara cepat. Oleh karena itu, analisis sentimen dibutuhkan guna mempercepat konsumen dalam menilai kualitas layanan maskapai. Hybrid Cuckoo Search (HCS) merupakan salah satu metode yang dapat digunakan untuk melakukan analisis tersebut. Metode ini mampu mengelompokkan informasi secara cepat. Penelitian ini bertujuan untuk mengimplementasikan HCS dalam melakukan analisis sentimen pada data opini penumpang maskapai penerbangan. Hasil uji coba menunjukkan bahwa nilai rata-rata akurasi, <em>precision</em>, dan <em>recall</em> dari data opini 7 maskapai dengan 1.000 iterasi masing-masing sebesar 69,24%; 70,88%; dan 77,57%.</p><p> </p><p><em><strong>Abstract</strong></em></p><p class="Abstract"><em>The high demands of airplanes usage are influenced by the increasing levels of people's mobility who want to trip from one city to another in a short time. However, not all airlines company could provide satisfactory services for the consumers. The quality of services provided by an airline, in terms of safety, security, and convenience, is usually known through passenger opinions. The number of negative opinions gained by airlines indicates its poor quality of service and vice versa. However, the increasing number of opinion increases the difficulty of the consumer in assessing the quality of the airline quickly. Therefore, sentiment analysis is needed to accelerate the consumer in assessing the quality of airline services. Hybrid Cuckoo Search (HCS) is a method which can be used in conducting such analysis. This method is able to group information quickly. This study aims to implement HCS in conducting sentiment analysis on airline passenger opinion data. The results show that the averaged accuracy, precision, and recall from opinion dataset of 7 airlines company at 1,000 iteration are 69.24%, 70.88%, and 77.57% respectively.</em></p><p><em><strong><br /></strong></em></p>

scholarly journals KINERJA APARATUR DALAM MENINGKATKAN KUALITAS PELAYANAN DI BADAN PENGHUBUNG PEMERINTAH PROVINSI KALIMANTAN TENGAH DI JAKARTA

2021 ◽  
Vol 3 (1) ◽  
pp. 82-98
Author(s):  
Ichsan Fravidya Nugraha ◽  
Khasan Effendy ◽  
Dahyar Daraba
Keyword(s):  
Quality Of Service ◽  
Qualitative Method ◽  
Descriptive Analysis ◽  
Analysis Data ◽  
Poor Quality ◽  
Provincial Government ◽  
Central Kalimantan ◽  
Limited Opportunity ◽  
Technical Capability

This study was aimed to investigate the performance of the workers of the Liaison Agency of the Central Kalimantan Provincial Government in delivering their services. This study employed the qualitative method with descriptive analysis. Data used in this studywere obtained through interview, observation, and document analysis. This study examined the performance of the workers in improving the quality of service and focused on the mechanism and strategy that the workers used in conducting their duties andidentification of the factors that affecting their performance. Then, all the datawere analyzed using the SWOT method and Litmust Test. The result of this study shows that the performance of the workers of the Liaison Agency of the Central Kalimantan Provincial Government is not optimal. Some of the difficulties that are found to be the reasons of the dissatisfied performance of the workers are the low level of education and knowledge and the lack of experience. Furthermore, there is only a few numbers of workers that have the technical capability, limited opportunity to improve their capability through education or training either in structural or functional form, and the limited chance to pursue higher education that caused the poor quality of service.

A Perspective on Self-Optimization in Next Generation Cellular Networks

2016 ◽  
pp. 66-91
Author(s):  
Sumita Mishra ◽  
Nidhi Mathur
Keyword(s):  
Quality Of Service ◽  
Cellular Networks ◽  
Poor Quality ◽  
Wireless Channel ◽  
Cellular Systems ◽  
Next Generation ◽  
High Bandwidth ◽  
Telecom Service ◽  
Key Aspects

During the past few decades wireless technology has seen a tremendous growth. The recent introduction of high-end mobile devices has further increased subscribers' demand for high bandwidth and quality of service. The number of nodes in future cellular systems will be too large to be configured and maintained manually. Further the mobility of users, the varying nature of the wireless channel and variation in user demand systems requires optimization of network parameters and delay in configuration may cause congestion and poor Quality of Service. Due to this increased complexity and the huge scale of wireless systems the network configuration, optimization and maintenance process performed by radio engineers has become inefficient and therefore, lot of research is being done to introduce self-optimizing capabilities within the network, which is expected to permit higher end user Quality of Service (QoS) and less operation cost and maintenance cost for telecom service providers. This chapter details the key aspects related to self optimization of next generation cellular networks.

scholarly journals Long Term Evolution (LTE) Network Evaluation in the South-West Region of Nigeria

2019 ◽  
Vol 4 (3) ◽  
pp. 86-92
Author(s):  
Bamidele Moses Kuboye
Keyword(s):  
Quality Of Service ◽  
Mobile Communications ◽  
Network Architecture ◽  
The South ◽  
Telecommunication System ◽  
Lte Network ◽  
West Region ◽  
South West ◽  
South West Region

The LTE broadband evolved from an earlier Third Generation Partnership Project system which is known as the Universal Mobile Telecommunication System (UMTS), which evolved from the Global System for Mobile Communications (GSM). The network architecture of this system has been designed with the aim to support a packet-switched traffic with seamless mobility and great quality of service. The main goal of the LTE is to provide a high data rate with low latency and a packet optimized radio access technology that supports deployment of bandwidth. Hence, this study is based on the evaluation of the LTE network in the south-west region of Nigeria. This study evaluates the LTE network strength in the South-West region of Nigeria. Questionnaires were administered among users in these areas randomly. Thereafter, data were analyzed and research questions were answered from the analyzed results. The results showed that 9Mobile and MTN has the best quality of service of LTE network in South-West, Nigeria, also that the LTE network has not really been active in Osun and Ekiti states.

scholarly journals Using Programmable Interfaces for Networks as the Key to Provide Quality of Service in the Internet

10.28945/2410 ◽  
2001 ◽  
Author(s):  
Jairo Gutierrez ◽  
Terence Wee
Keyword(s):  
Quality Of Service ◽  
New Technologies ◽  
Communication Technologies ◽  
Integrated Approach ◽  
Poor Quality ◽  
The Internet ◽  
Heterogeneous Nature ◽  
Dynamic Modification ◽  
Ip Routers

The growth of the Internet with its increasing levels of traffic, more ambitious applications and the convergence of communication technologies results in poor quality of service. New technologies such as those discussed in this paper have been developed to aid in introducing quality of service to the Internet. However, those efforts may seem to be in vain due to the heterogeneous nature of IP-based networks. This paper suggests an integrated approach to provide end-to-end quality of service on the Internet based on the use of programmable interfaces. The need for dynamic modification of policies and configurations within IP routers and switches is already beginning to emerge and that functionality will help fulfill customers' demands for differentiated services.

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