Temat: WiMAX - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Lessons Learned from WiMAX Deployment at INEA
Autorzy:: Kowalik, K.
Dudek, D.
Kołodziejski, M.
Musznicki, B
Grzybek, E.
Jarzina, J.
Powiązania:: https://bibliotekanauki.pl/articles/308259.pdf
Data publikacji:: 2014
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: interference
radio capacity
radio planning
WiMAX
Opis:: Home broadband access is continuously demanding more bandwidth fueled by video streaming, entertainment and gaming applications. In 2010, a company INEA decided to roll-out new WiMAX-based services aimed to meet the needs of home users across theWielkopolska region of western Poland. It was decided to follow the 802.16e standard and the Time Division Duplexing (TDD) mode that oer the ability to adjust the downlink/uplink ratio and thus are well suited for data transmission. After an extensive testing period of equipment from various vendors, engineers at INEA have chosen the Motorola (currently Cambium Networks) PMP320 solution because it is compact and its components are space- and energy-ecient. The company choice was also influenced by its simple operation, management and installation, which ensured low costs of ownership. So far, this deployment has provided fast and aordable connectivity for Internet and telephony services to around 5,500 households across the 30,000 sq. km region. After 3 years of experience, INEA would like to share the lessons learned from this roll-out.
Źródło:: Journal of Telecommunications and Information Technology; 2014, 3; 34-41
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A hybrid-mesh solution for coverage issues in WiMAX metropolitan area networks
Autorzy:: Gierłowski, K.
Wodniak, J.
Nowicki, K.
Powiązania:: https://bibliotekanauki.pl/articles/308513.pdf
Data publikacji:: 2008
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: IEEE 802.16
WiMAX
coverage
mesh
measurements
Opis:: The new WiMAX technology offers several advantages over the currently available (GSMor UMTS-based) solutions. It is a cost effective, evolving, and robust technology providing quality of service guarantees, high reliability, wide cov- erage and non-line-of-sight (NLOS) transmission capabilities. All these features make it particularly suitable for densely populated urban environments. In this paper we discuss the design and implementation difficulties concerning network coverage discovered in a test-bed implementation of WiMAX. We point out the presence of unexpected "white spots" in the coverage, which are not inherently characteristic of the WiMAX concept. As a possible remedy to this significant drawback of the otherwise very promising technology, we consider reconfigurable mesh organization of WiMAX base stations. We also suggest directions for further development of this kind of network operation, partly based on our practical experience. Despite the clear advantages of the mesh mode in WiMAX networks, its development is currently at an early stage, due to the high complexity of the necessary mechanisms. In this situation, we propose an original, much simpler solution: the so-called support-mesh mode.
Źródło:: Journal of Telecommunications and Information Technology; 2008, 1; 20-28
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Observation of WiMAX Radio Parameters to Enhance Spectrum Utilization in Mixed Environment
Autorzy:: Kowalik, K.
Kliks, A.
Musznicki, B
Kołodziejski, M.
Kryszkiewicz, P.
Powiązania:: https://bibliotekanauki.pl/articles/307572.pdf
Data publikacji:: 2018
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: 5G
bandwidth sharing
spectrum utilization
statistical characteristics
WiMAX
Opis:: It is believed that 5G networks will provide 1000 times more capacity than current solutions. One of the keys to achieve that goal is not only the utilization of additional radio bands, but also and foremost, the dynamic and efficient spectrum sharing. To successfully implement it such feature statistical observation and analysis of currently operational legacy systems are required. Comprehensive data on the signal parameters will allow then to determine and tune the approach to simultaneous bandwidth usage by existing and new systems. Therefore, to define and introduce the problem this paper presents a conceptual analysis of IEEE 802.16e based WiMAX network operating in the 3.6--3.8 GHz band on the eve of spectrum sharing introduction.
Źródło:: Journal of Telecommunications and Information Technology; 2018, 1; 42-50
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Problems of Broadband in Rural Areas in Light of the BReATH Project Experiences
Autorzy:: Białoń, P.
Powiązania:: https://bibliotekanauki.pl/articles/307962.pdf
Data publikacji:: 2008
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: broadband initiatives
demand
rural area
techno-economic analysis
WiMAX
Opis:: Some lessons learned from the EU project "Broadband e-Services and Access to the Home" (2005-2007) are presented concerning the broadband development in rural ar- eas. In particular, the paper discusses the common problems of broadband deployment in the rural environment, various aspects of stimulating demand for broadband, the limitations of public aid and, most importantly, the problems of technoeconomic analysis.
Źródło:: Journal of Telecommunications and Information Technology; 2008, 4; 97-103
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Performance of Hybrid Sensing Method in Environment with Noise Uncertainty
Autorzy:: Kustra, M.
Kosmowski, K.
Suchański, M.
Powiązania:: https://bibliotekanauki.pl/articles/308868.pdf
Data publikacji:: 2018
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: Covariance Absolute Value
Cyclic Autocorrelation Function
hybrid detector
noise uncertainty
OFDM
SNR wall
WiMAX
Opis:: The paper presents a novel hybrid spectrum sensing method used in cognitive radio and presents a hybrid detector (HD) which improves the sensing performance. The proposed HD takes advantage of the energy detection (ED) principle and a method based on Covariance Absolute Value (CAV), as well as on Cyclic Autocorrelation Function (CAF). The paper shows the limitations of using ED, resulting from the uncertainty of spectral density of noise power estimation, known as the SNR wall. The paper describes a system model and presents simulation results for the OFDM signal of a WiMAX-based communications system. The simulation results refer to an ideal environment with well-known parameters, and to an environment with uncertain spectral density of noise power estimation.
Źródło:: Journal of Telecommunications and Information Technology; 2018, 1; 51-57
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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