Autor: Islam, S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A newly developed random walk model for PCS network
Autorzy:: Islam, I.
Hossain, S.
Powiązania:: https://bibliotekanauki.pl/articles/308852.pdf
Data publikacji:: 2005
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: cell cluster
random walk
subarea n
state transition
probability matrix
expected number of steps
Opis:: Different types of random walk models are prevalent in mobile cellular network for analysis of roaming and handover, being considered as important parameters of traffic measurement and location updating of such network. This paper proposes a new random walk model of hexagonal cell cluster, exclusively developed by the authors and a comparison is made with two existing models. The proposed model shows better performance in context of number of probability states compared to existing models.
Źródło:: Journal of Telecommunications and Information Technology; 2005, 1; 153-156
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Comparison of traffic performance of QPSK and 16-QAM modulation techniques for OFDM system
Autorzy:: Islam, I.
Hossain, S.
Powiązania:: https://bibliotekanauki.pl/articles/308854.pdf
Data publikacji:: 2005
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: OFDM
QPSK
16-QAM
IFFT
frequency spectrum
PAPR
BER
Opis:: Orthogonal frequency division multiplexing (OFDM) provides better spectral efficiency than frequency division multiplexing (FDM), while maintaining orthogonal relation between carriers; hence traffic is better carried by OFDM than FDM within the same spectrum. This paper reveals a comparison of spectral efficiency, performance of communication system in context of bit error rate (BER) for the same information rate and peak to average power ratio (PAPR) of quadrature amplitude shift keying (QPSK) and 16-quadrature amplitude modulation (16-QAM) technique.
Źródło:: Journal of Telecommunications and Information Technology; 2005, 1; 147-152
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Modeling of mixed traffic for mobile cellular network
Autorzy:: Islam, I.
Das, J. K.
Hossain, S.
Powiązania:: https://bibliotekanauki.pl/articles/307662.pdf
Data publikacji:: 2007
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: quality of service
Markovian chain
time and call congestion
probability states and voice data integrated network
Opis:: The most convenient way of presenting one- or two-dimensional offered traffic in a network by Markovian chain to evaluate quality of service (QoS). Pictorial presentation of chain becomes very complicated for three dimensional traffic case, required for voice data integrated service/mixed traffic of mobile cellular network; hence application of cut or node equations become a cumbersome job. This paper proposes a model of three-dimensional traffic in a network for both unlimited and limited user case. Here direct analytical method is introduced instead of Markovian chain to achieve traffic parameters.
Źródło:: Journal of Telecommunications and Information Technology; 2007, 1; 83-89
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Modeling of voice data integrated traffic in 3G mobile cellular network
Autorzy:: Islam, I.
Das, J. K.
Hossain, S.
Powiązania:: https://bibliotekanauki.pl/articles/308765.pdf
Data publikacji:: 2007
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: 3G mobile
voice data integrated service
micro cell
macro cell
satellite cell
Markovian chain and thinning scheme
Opis:: The most important feature of 3G mobile cellular network is introduction of voice data integrated service under multilayered cell environment to support overflow traffic of lower layered cells by upper ones. This paper deals with traffic model of three layered cells, i.e., micro cell, macro cell and satellite cell. Here a new call admission control is introduced for three layered cell of 3G mobile cellular network. State transition chain is designed for theoretical analysis of above mentioned traffic. Blocking probability of data call, new voice call and handover failure of voice call, probability of utilization of micro cell channel, macro cell channel and satellite cell channel are analyzed against different traffic parameters and yield logical results.
Źródło:: Journal of Telecommunications and Information Technology; 2007, 2; 103-108
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

Artykuł

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