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Master's Dissertation
DOI
https://doi.org/10.11606/D.18.2011.tde-07042011-152547
Document
Author
Full name
Marcelo Alves Guimarães
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2011
Supervisor
Committee
Rocha, Mônica de Lacerda (President)
Paradisi, Alberto
Romero, Murilo Araujo
Title in Portuguese
Transporte TDM em redes GPON
Keywords in Portuguese
Circuit Emulation Service (CES)
Comunicação óptica
Comutação digital
Field-Programmable Gate Array (FPGA)
Fragmentação de E1
Gigabit PON (GPON)
Hardware Description Language (HDL)
Passive Optical Networks (PON)
TDM nativo
Transporte TDM
Abstract in Portuguese
Neste trabalho analisamos e propomos a utilização de TDM (Time Division Multiplexing) nativo canalizado/estruturado em redes PON (Passive Optical Network) com padrão GPON (Gigabit Passive Optical Network), com ênfase na estrutura de transmissão do legado das redes de telefonia. O objetivo principal é obter um aumento na eficiência de banda transmitida através da fragmentação de sinais E1 sem que seja necessário o uso de técnicas de emulação de circuito (que reduzem a eficiência de banda devido à adição de cabeçalhos). Inicialmente, é descrito o transporte TDM em redes GPON, como efetuado pelos equipamentos comerciais atuais através de duas técnicas: CES - Circuit Emulation Service e TDM nativo não estruturado. Em seguida, é introduzido o conceito de comutação digital visando sua aplicação no transporte TDM nativo estruturado em redes GPON. Nesta etapa, é proposta uma solução para este transporte, é descrito o protocolo utilizado bem como seu funcionamento. Por fim, como prova de conceito, é apresentada uma implementação em HDL (Hardware Description Language) para FPGA (Field Programmable Gate Array).
Title in English
TDM transport in GPON networks
Keywords in English
Circuit Emulation Service (CES)
Digital Switching
E1 fragmentation
Field-Programmable Gate Array (FPGA)
Gigabit PON (GPON)
Hardware Description Language (HDL)
Native TDM
Optical Communication
Passive Optical Networks (PON)
TDM Transport
Abstract in English
In this work we analyze and propose the use of native channeled /structured TDM (Time Division Multiplexing) in GPON (Gigabit Passive Optical Network), with emphasis on the structure for transmission of the telephone network legacy. The main target is to achieve an increase in transmitted bandwidth efficiency by fragmenting E1 signals, thus avoiding the use of circuit emulation techniques (which reduce the bandwidth efficiency due to overhead addition). Initially, it is described in TDM transport in GPON networks, as it is performed in present commercial equipment by two techniques: CES - Circuit Emulation Service and Native TDM - unstructured. Next, we introduce the concepts of digital switching aiming its application on the transport of native and structured TDM in GPON. At this stage, we propose a transport solution, describe its protocol and functionalities. Finally, for concept proof, we present an implementation in HDL (Hardware Description Language) meant to FPGA (Field Programmable Gate Array) application.
 
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Marcelo.pdf (3.69 Mbytes)
Publishing Date
2011-04-27
 
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