Temat: WCDMA - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: An effective method of channels assignment for third generation cellular system
Autorzy:: Amanowicz, M.
Gajewski, P.
Krygier, J.
Powiązania:: https://bibliotekanauki.pl/articles/309331.pdf
Data publikacji:: 2003
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: WCDMA
dynamic channel assignment
3G
Opis:: An original hybrid method of channels assignment for DS-CDMA system is discussed in the paper. This method combines standard PN codes assignment policy and dynamic channel assignment procedure that minimise the cost of channel assignment. OPNET simulation model DS-CDMA system was used for assessment of the hybrid method. The results of simulation presented in the paper confirmed that the proposed method importantly improves the quality of services in the third generation cellular system.
Źródło:: Journal of Telecommunications and Information Technology; 2003, 4; 74-78
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:: QoS Equalization in a W-CDMA Cell Supporting Calls of Innite or Finite Sources with Interference Cancelation
Autorzy:: Moscholios, I. D.
Kallos, G. A.
Katsiva, M. A.
Vassilakis, V. G.
Logothetis, M. D.
Powiązania:: https://bibliotekanauki.pl/articles/308455.pdf
Data publikacji:: 2014
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: bandwidth reservation
infinite sources
finite sources
recursive formula
time-call congestion probabilities
WCDMA
Opis:: In this paper, a multirate loss model for the calculation of time and call congestion probabilities in a Wideband Code Division Multiple Access (W-CDMA) cell is considered. It utilizes the Bandwidth Reservation (BR) policy and supports calls generated by an infinite or finite number of users. The BR policy achieves QoS equalization by equalizing congestion probabilities among calls of dierent service-classes. In the proposed models a multiple access interference is considered, and the notion of local blocking, user's activity and interference cancelation. Although the analysis of the proposed models reveals that the steady state probabilities do not have a product form solution, the authors show that the calculation of time and call congestion probabilities can be based on approximate but recursive formulas, whose accuracy is verified through simulation and found to be quite satisfactory.
Źródło:: Journal of Telecommunications and Information Technology; 2014, 3; 63-70
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:: Single hysteresis model for limited-availability group with BPP traffic
Autorzy:: Sobieraj, M.
Stasiak, M.
Weissenberg, J.
Zwierzykowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/307773.pdf
Data publikacji:: 2013
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: hysteresis mechanism
limited-availability group
multiservice BPP traffic
threshold models
WCDMA radio interface
Opis:: This paper presents a single hysteresis model for limited-availability group that are offered Erlang, Engset and Pascal traffic streams. The occupancy distribution in the system is approximated by a weighted sum of occupancy distributions in multi-threshold systems. Distribution weights are obtained on the basis of a specially constructed Markovian switching process. The results of the calculations of radio interfaces in which the single hysteresis mechanism has been implemented are compared with the results of the simulation experiments. The study demonstrates high accuracy of the proposed model.
Źródło:: Journal of Telecommunications and Information Technology; 2013, 3; 89-96
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:: The optimal power control method in multiuser cellular networks
Autorzy:: Yaremko, O.
Stryhalyuk, B.
Maksymyuk, T.
Lavriv, O.
Kozhurov, D.
Powiązania:: https://bibliotekanauki.pl/articles/411155.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:: WCDMA
MIMO
power control policy
signal-to-noise ratio
traffic localization
Opis:: In this paper a method of power control policies optimization in radiointerface of mobile network with code-division multiplexing is proposed. It allows reducing the interference level in downlink and uplink channels. The optimum SNR is provided in the cell based on this power control method. The SNR is enough to ensure capacity requirements and service quality parameters.
Źródło:: ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2013, 2, 1; 63-67
2084-5715
Pojawia się w:: ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:: Biblioteka Nauki

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