Gateway Congestion Controls in High-Speed Backbone Networks

1992 ◽  
pp. 109-122 ◽  
Author(s):  
Serge Fdida ◽  
Harry Santoso
Keyword(s):  
High Speed ◽  
Backbone Networks

scholarly journals Passive Optical Networks Progress: A Tutorial

Electronics ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 1081 ◽  
Author(s):  
Tomas Horvath ◽  
Petr Munster ◽  
Vaclav Oujezsky ◽  
Ning-Hai Bao
Keyword(s):  
Fiber Optics ◽  
Optical Networks ◽  
High Speed ◽  
Passive Optical Networks ◽  
Time Transfer ◽  
Remote Areas ◽  
Backbone Networks ◽  
New Class ◽  
Fiber Sensing ◽  
Current Standards

For many years, passive optical networks (PONs) have received a considerable amount of attraction regarding their potential for providing broadband connectivity to almost every citizen, especially in remote areas where fiber optics can attract people to populate regions that have been abandoned. Error-free connectivity without dropouts can offer new opportunities to communicate, earn money and enjoy cultural events. Transmission speeds are multigigabit with distances of a few tens of kilometers; these specifications were previously reserved for high-speed and long-haul backbone networks. PONs can also support a new class of applications, such as accurate time transfer or distributed fiber sensing and follow new trends in open networking. An outline of past and current standards and standards that have been proposed for the latest generation of multigigabit PONs is provided.

Performance study of congestion control for high-speed backbone networks

1992 ◽  
Vol 15 (7) ◽  
pp. 429-437 ◽  
Author(s):  
Hiroshi Inai ◽  
Kazuhiro Ohtsuki
Keyword(s):  
Congestion Control ◽  
High Speed ◽  
Performance Study ◽  
Backbone Networks

Broadband Fiber Optical Access

2009 ◽  
pp. 149-156
Author(s):  
George Heliotis
Keyword(s):  
High Speed ◽  
Fiber Optic ◽  
Access Networks ◽  
Digital Television ◽  
Internet Service ◽  
Optical Access ◽  
Backbone Networks ◽  
Underlying Network ◽  
Multiparty Video Conferencing ◽  
Bandwidth Demand

We are currently witnessing an unprecedented growth in bandwidth demand, mainly driven by the development of advanced broadband multimedia applications, including video-on-demand (VoD), interactive highdefinition digital television (HDTV) and related digital content, multiparty video-conferencing, and so forth. These Internet-based services require an underlying network infrastructure that is capable of supporting high-speed data transmission rates; hence, standards bodies and telecom providers are currently focusing on developing and defining new network infrastructures that will constitute future-proof solutions in terms of the anticipated growth in bandwidth demand, but at the same time be economically viable. Most users currently enjoy relatively high speed communication services through digital subscriber line (DSL) access technologies, but these are widely seen as short-term solutions, since the aging copper-based infrastructure is rapidly approaching its fundamental speed limits. In contrast, fiber optics-based technologies offer tremendously higher bandwidth, a fact that has long been recognized by all telecom providers, which have upgraded their core (backbone) networks to optical technologies. As Figure 1 shows, the current network landscape thus broadly comprises of an ultrafast fiber optic backbone to which users connect through conventional, telephone grade copper wires. It is evident that these copper-based access networks create a bottleneck in terms of bandwidth and service provision. In Figure 1, a splitter is used to separate the voice and data signals, both at the user end and at the network operator’s premises. All data leaving from the user travel first through an electrical link over telephonegrade wires to the operator local exchange. They are then routed to an Internet service provider (ISP) and eventually to the Internet through fiber-optic links. In contrast to the access scheme depicted in Figure 1, fiber-to-the-home (FTTH) architectures are novel optical access architectures in which communication occurs via optical fibers extending all the way from the telecom operator premises to the customer’s home or office, thus replacing the need for data transfer over telephone wires. Optical access networks can offer a solution to the access network bottleneck problem, and promises extremely high bandwidth to the end user, as well as future-proofing the operator’s investment (Green 2006; Prat, Balaquer, Gene, Diaz, & Fiquerola, 2002). While the cost of FTTH deployment has been prohibitively high in the past, this has been falling steadily, and FTTH is now likely to be the dominant broadband access technology within the next decade (Green, 2006).

scholarly journals Introduction to inmarsat broadband global area network for mobile backbone networks

2020 ◽  
Vol 9 (2) ◽  
pp. 843-852
Author(s):  
Stojce Dimov Ilcev
Keyword(s):  
Mobile Networks ◽  
High Speed ◽  
Base Stations ◽  
Area Network ◽  
Variable Bit Rate ◽  
Wireless Data ◽  
Backbone Networks ◽  
Military Applications ◽  
Global Coverage ◽  
Personal Devices

In this paper is introduced the Inmarsat Global Area Network (GAN) as backbone to mobile networks. At the end of 2005 Inmarsat launched its BGAN service as the first high speed wireless data solutions with voice available on a global basis. The service is accessed through a portable, broadband satellite transceiver with antenna easy to carry as a laptop. The BGAN network consists constellation of Geostationary Earth Orbit (GEO) I-4 and I-5 satellites with an optimized ground network, which interconnects variety of terrestrial infrastructures at local BGAN users. This system employs bandwidth efficient modulation and coding techniques, capable of supporting variable bit-rate services and QoS depending on the needs of the application. The BGAN system is satellite component of 3G IMT-2000, specially the Universal Mobile Telecommunications Service (UMTS) standards. It will provide a near-global coverage overlay for the terrestrial networks, giving users service availability beyond the reach of terrestrial IMT-2000 networks. A range of supported terminals, personal devices, portable and mobile units linked with onboard entertainment, communications systems to remote base stations for civilian and military applications and SCADA or M2M are discussed.

SIMULINK MODEL AND FPGA-BASED OFDM COMMUNICATION SYSTEM: A SIMULATION AND HARDWARE INTEGRATED PLATFORM

2010 ◽  
Vol 01 (03) ◽  
pp. 369-404 ◽  
Author(s):  
LE KHOA DANG ◽  
HUU PHUONG NGUYEN ◽  
LE NGUYEN BINH ◽  
DUC NHAN NGUYEN
Keyword(s):  
Optical Fiber ◽  
Optical Communications ◽  
Communication Systems ◽  
High Speed ◽  
Optical Fiber Communication ◽  
Wireless Access ◽  
Ultra Wideband ◽  
Fiber Communication ◽  
Backbone Networks ◽  
Simulink Model

Ultra-broadband networks are currently attracting significant interests in employing wireless access and optical fiber access to the home and to the building at symbol rate reaching Gb/s. OFDM is a multicarrier modulation technique and considered to offer significant reduction of the data symbol to be carried per carrier channel, especially in ultra-high speed optical communications with bit rate reaching 100 Gb/s or even higher. This paper thus presents a novel and generic OFDM system employing both MATLAB Simulink and FPGA-based development software platform for simulation as well as hardware implementation for the generation and detection of OFDM signals for wireless and optical communications transmission media. Although the transmission medium is modeled with delay distortion filter in the baseband, this model would be valid for passband signals as the amplitude is represented by complex amplitude whose phase would be the phase of the carrier. The Simulink and hardware models presented hereunder are scalable to much higher speed allowing possible implementation in multi-Giga samples per second electronic processors. The sub-systems of the OFDM transmitter and receiver are presented to demonstrate the feasibility of such models for ultra-wideband communication systems such as wireless access and long haul optical fiber communication backbone networks.

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