Wyniki wyszukiwania - BazTech

1

Analysis of Coverage and Area Spectral Efficiency under Various Design Parameters of Heterogeneous Cellular Network

Abbasi Anum, Shaikh M. Mujtaba, Dahri Safia, Soomro Sarfraz Ahmed, Panhwar Fozia Aijaz

International Journal of Electronics and Telecommunications

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2021

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Vol. 67, No. 4

639--645

EN

As day by day the population is increasing, the use of mobile phones and different applications is increasing which requires high data rate for transmission. Homogeneous cellular network cannot fulfill the demand of mobile users, so creating a heterogeneous cellular network (HCN) is a better choice for higher coverage and capacity to fulfil the increasing demand of upcoming 5G and ultra-dense cellular networks. In this research, the impact of antenna heights and gains under varying pico to macro base stations density ratio from 2G to 5G and beyond on two-tier heterogeneous cellular network has been analyzed for obtaining optimum results of coverage and area spectral efficiency. Furthermore, how the association of UEs affects the coverage and ASE while changing the BSs antenna heights and gains has been explored for the two-tier HCN network model. The simulation results show that by considering the maximum macro BS antenna height, pico BS antenna height equal to user equipment (UE) antenna height and unity gains for both macro and pico tiers, the optimum coverage and area spectral efficiency (ASE) for a two-tier fully loaded heterogeneous cellular network can be obtained.

2

Characterizing The SINR in Poisson Network Using Factorial Moment

Fadoul Moubachir Madani, Ngah Razali, Moradi Alireza

International Journal of Electronics and Telecommunications

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2019

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Vol. 65, No. 4

611--617

EN

Usually, cellular networks are modeled by placing each tier (e.g macro, pico and relay nodes) deterministically on a grid. When calculating the metric performances such as coverage probability, these networks are idealized for not considering the interference. Overcoming such limitation by realistic models is much appreciated. This paper considered two- tier twohop cellular network, each tier is consisting of two-hop relay transmission, relay nodes are relaying the message to the users that are in the cell edge. In addition, the locations of the relays, base stations (BSs), and users nodes are modeled as a point process on the plane to study the two hop downlink performance. Then, we obtain a tractable model for the k-coverage probability for the heterogeneous network consisting of the two-tier network. Stochastic geometry and point process theory have deployed to investigate the proposed two-hop scheme. The obtained results demonstrate the effectiveness and analytical tractability to study the heterogeneous performance.

3

Nowa adaptacyjna metoda alokacji strumieni danych oparta na estymacie parametrów kanału radiowego w heterogenicznej sieci WBAN

Cwalina K., Ambroziak S. J., Stefański J.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2017

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nr 6

437--440, CD

PL

W artykule przedstawiono nową metodę adaptacyjnej alokacji strumieni danych w heterogenicznej sieci WBAN (Wireless Body Area Network) typu off-body oraz wykonane stanowisko badawcze. Wyniki uzyskane przy użyciu opracowanej metody porównano z wybranymi algorytmami możliwymi do zastosowania w tychże sieciach. Wykazano zwiększenie efektywności wykorzystania dostępnych zasobów czasowo-częstotliwościowych niezależnie od miejsca montażu węzła mobilnego na ciele człowieka.

EN

The new adaptive method for data streams allocation in heterogeneous Wireless Body Area Networks and measurement equipment is presented. The results obtained using the developed method compared with the selected algorithms likely to be used in those networks. An efficiency use of available resource increase has been shown regardless of the montage location of the mobile node on the human body.

4

Optimal Spectrum Utilization and Flow Controlling In Heterogeneous Network with Reconfigurable Devices

Hashmi S. S., Sattar S. A., Soundararajan K.

International Journal of Electronics and Telecommunications

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2017

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Vol. 63, No. 3

269--277

EN

Fairness provisioning in heterogeneous networks is a prime issue for high-rate data flow, wherein the inter-connectivity property among different communication devices provides higher throughput. In Hetnet, optimal resource utilization is required for efficient resource usage. Proper resource allocation in such a network led to higher data flow performance for real-time applications. In view of optimal resource allocation, a resource utilization approach for a reconfigurable cognitive device with spectrum sensing capability is proposed in this paper. The allocation of the data flow rate at device level is proposed for optimization of network fairness in a heterogeneous network. A dynamic approach of rate-inference optimization is proposed to provide fairness in dynamic data traffic conditions. The simulation results validate the improvement in offered quality in comparison to multi-attribute optimization.

5

Concept of unifying the data exchange interface in heterogeneous ITS networks

Sumila M.

Archives of Transport System Telematics

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2014

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Vol. 7, iss. 4

45--49

EN

A concept of unifying the communications interface between heterogeneous ITS subsystems was presented in this paper. In its first part, it concentrates on causes for and consequences of having heterogeneous networks. Then it goes to present methods developed to counteract that phenomenon through the seven layer OSI model and the CORBA standard. In latter parts, two data exchange protocols in heterogeneous ITS networks were presented. In the context of their limitations, an original concept was developed using a shared database as a universal communication interface between different ITS systems.

6

Using an OpenLDAP Server as Free Software for the Centralization of Data for Management Systems of Heterogeneous LAN Eenvironments in Companies

Brejnak K.

Zeszyty Naukowe. Elektryka / Politechnika Opolska

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2013

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z. 69

13--14

EN

This article presents the opportunities that computer software disseminated under the terms of GNU GPL license (General Public License) as well as its usefulness for creating a management system for a heterogeneous network of LAN’s (Local Area Networks) and the provision of such an enterprise.

7

A Host Based Autonomous Scheme for Seamless Vertical Handover

Hussain R., Malik S.A., Riaz R. A., Ahmed S., Shafiq G., Iqbal A., Abrar S., Khan S. A.

Przegląd Elektrotechniczny

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2012

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R. 88, nr 9b

314-318

EN

In this paper we suggest a host based, end-to-end selfreliant scheme for handover in heterogeneous network environment. It directly involves the correspondent node in the handover process. The proposed scheme imitates the Network Address Translation. It maps a logical address to another logical address. It modifies the address information in the header of the packet while it is in transition. In principle the process is identical to the NAT box operation, but the goal is different. While NAT is primarily used in conjunction with masquerading to hide the private IP address space, HaMAT works in conjunction with MIH and serves to hide the IP address change of the mobile node encountered due to the vertical handover. HaMAT is a functional entity just like Media Independent Handover Function, and it resides inside the Mobile Node and Correspondent Node. By eliminating the need for rerouting, tunneling and route optimization as required in Mobile IP, HaMAT achieves high performance results in terms of handover delay, end to end packet latency, jitter and the overhead involved. The service disruption time for HaMAT is as low as 10 msec compared to reported handover delays of 260 msec and 1 sec for MIPv4 and MIPv6 respectively.

PL

W artykule zaproponowano bazujący na hoście schemat przełączania typu handover w niejednorodnym środowisku sieciowym. Schemat imituje Network Address Translation i mapuje logiczny adres orasz modyfikuje nagłówek w pakiecie.

8

Możliwości wykorzystania umts w bezprzewodowych sieciach heterogenicznych

Chrzan M., Górska M.

Logistyka

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2009

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nr 6

CD-CD

PL

W referacie omówiono problemy związane z możliwą do uzyskania pojemnością w systemie UMTS w zależności od wykorzystanych rozwiązań technicznych, zastosowanych procedur ruchowych oraz algorytmów wymiany informacji. Rozważania mają istotne znaczenie w związku z rozpatrywanym wykorzystaniem UMTS w sieci heterogenicznej jako jednego ze znaczących systemów w globalnym systemie poszukiwania użytkowników dróg publicznych wg ustalonych cech.

EN

This abstract discuss problems related with capacity possible to obtained in UMTS system in dependence of used technical solutions, movement procedures and also the information transfer algorithm. The considerations have significant meaning in connection with using UMTS heterogeneous network as one of the most important systems in global system search of public roads users according to established features.

9

The Object Oriented Platform for the Process MIgration in the Heterogeneous Networks

Uhruski P., Onderka Z.

Schedae Informaticae

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2002

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Vol. 11

99-114

EN

This paper describes the object oriented approach to the design of a task migration platform in a heterogeneous computer network. The load sharing and load balancing problems are discussed. The load sharing problem consisting of three parts: an information policy, a location policy and a transfer policy was presented [3]. The migration Software Development Kit (SDK) for an application, which should meet the well defined requirements, is defined. The above mentioned SDK was applied to the example of multiplying the given vector by the given matrix, which is a frequent subproblem in the CAE calculations.