Temat: GPON - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Timing measurement and simulation of the activation process in gigabit passive optical networks
Autorzy:: Horvath, T.
Munster, P.
Jurcik, M
Koci, L
Filka, M.
Powiązania:: https://bibliotekanauki.pl/articles/173869.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: gigabit passive optical network (GPON)
GPON transmission convergence (TC) layer measurement
transmission convergence (TC) layer simulation
MATLAB
GPON timing
Opis:: The passive optical networks are widely used nowadays. Service providers have many customers in their distribution networks. The most important thing for communication between the end unit and the control unit is an establishment contact. Design and measurement of the activation process between optical network unit and optical line termination is presented. In general, the service providers have a big split ratio (up to 1:128) due to the connection eminent value of the customers per optical line termination port in chassis. We present the simulation of the connection process for 16, 32, 64, and 128 optical network units and the measurement for single optical network unit (the GPON Xpert is able to read a single connection process). We compare our results in simulation discussion.
Źródło:: Optica Applicata; 2015, 45, 4; 459-471
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Novel rogue optical network unit detection algorithm for gigabit passive optical networks
Autorzy:: Horvath, T.
Munster, P.
Dubravec, L.
Filka, M.
Powiązania:: https://bibliotekanauki.pl/articles/174637.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: gigabit passive optical network
GPON
rogue optical network unit
ONU
data analysis
detection algorithm
Opis:: Passive optical networks are widely used as a promising solution for future access networks. Currently, the bandwidth is still increasing which means the current copper networks are not able to transfer new services such as 4K video, live streaming, etc. In other words, they reached their capacity limit. The passive optical networks rely on point-to-multipoint technology. That means each customer uses a share medium by time slots. Each time slot exactly specifies who and when is able to transfer data. In general, this control mechanism is implemented in the optical network unit by worst transmission convergence layer. On the other hand, there are cases when the optical network unit (it is called rogue optical network unit) does not follow instructions provided by the optical line termination, for example, if an attacker modifies a firmware of the end unit and/or when the control protocol is not loaded properly inside optical network unit. In worst case, the optical network unit transmits data in a continual mode (other optical network units cannot send data). Thestandard defines finding of the rogue optical network unit but it does not specify how the rogue optical network unit should be allocated because the frames of the rogue optical network unit do not contain the proper parameters. We realized a measurement in a real network with the rogue optical network unit and then we analyzed the captured data. A new algorithm for the rogue optical network unit allocation is presented. We do not consider any modification of the transmission convergence layer in gigabit passive optical networks.
Źródło:: Optica Applicata; 2016, 46, 3; 421-433
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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