Tìm thấy 19+ kết quả cho từ khóa "Optical network"
000000254878-TT.pdf
dlib.hust.edu.vn Xem trực tuyến Tải xuống
Đó là lý do tôi chọn đề tài “Mạng quang học thế hệ mới WDM Optical Network” 2. Mục tiêu nghiên cứu của luận văn. Mục tiêu chung : Tìm hiểu khái quát về mạng quang học thế hệ mới WDM như : nguyên lý hoạt động, thành phần của hệ thống , kỹ thuật chuyển mạch, giải thuật định tuyến và gán bước sóng * Mục tiêu riêng.
tailieu.vn Xem trực tuyến Tải xuống
Next Generation Network (NXGN. New Generation Network (NWGN. NWGN （ New Generation Network). Next Generation Network and New Generation Network. Issues in the Internet. New Generation Network (NWGN). Network testbed for R&D on New Generation Network. Optical Networking Technologies. Optical path ISP network B. management for optical path provisioning between terabit-class LANs.
tailieu.vn Xem trực tuyến Tải xuống
10.4.1 Just Enough Time Protocol 801. 10.4.2 Just In Time Protocol 803. 10.4.3 Contention Resolution in OBS Networks 806. 10.5 Optical Label Switching 808. 10.5.1 All-Optical Label Swapping 809. 10.5.2 Contention Resolution Techniques 811. 10.5.3 OLS Network Implementations 811. 10.6 Conclusions 820. 10.7 Problems 822. 11.2 Multiwavelength Optical Network Testbeds 838. 11.2.1 Optical Networks Technology Consortium 838. 11.2.2 All-Optical Network Consortium 839. 11.2.4 Multiwavelength Optical Network
tailieu.vn Xem trực tuyến Tải xuống
Optical line terminal Optical multiplex section Optical network unit On-off keying. Optical time division multiplexing Optical transport network. Acronym Expansion OUPSR. Optical unidirectional path-switched ring Optical crossconnect. Polarization-mode dispersion. Private network-to-network interface Passive optical network. Point-to-point WDM. Storage-area network. Semiconductor optical amplifier Synchronous optical network State of polarization. Shared protection ring. Acronym Expansion SR.
tailieu.vn Xem trực tuyến Tải xuống
Figure 1.12 An optical network consisting of all-optical subnetworks interconnected by optical-to-electrical-to-optical (OEO) converters. OEO converters are used in the network for adapting external signals to the optical network, for regeneration, and for wavelength conversion.. For simplicity we will talk mostly about optical packet switching. Fixed OTDM can be thought of as a subset of optical packet switching where the multiplexing is fixed instead of statistical..
tailieu.vn Xem trực tuyến Tải xuống
Figure 7.2 shows the three functional elements inside an OLT: transponders, wavelength multiplexers, and optionally, optical amplifiers (not shown in the figure).. A transponder adapts the signal coming in from a client of the optical network into a signal suitable for use inside the optical network. Likewise, in the reverse direction, it adapts the signal from the optical network into a signal suitable for the client.
tailieu.vn Xem trực tuyến Tải xuống
The optical layer itself is migrating from an opaque network, consisting of WDM links with electrical processing at the ends of the link, to an all-optical network, where traffic is passed through in the optical domain at intermediate nodes. At the same time, the optical network is moving from a static network to an agile network, where lightpaths can be set up and taken down as needed.. The subject matter in this chapter is widely covered in the business press and by investment houses.
tailieu.vn Xem trực tuyến Tải xuống
Optical interfaces for equipments and systems relating to the synchronous digital hierarchy.. Interface for the optical ~ransport network (OTN).. Characteristics for the OTN equipment functional blocks.. OTN management information model for the network element view.. Synchronous optical network (SONET) transport systems: Common generic criteria.. SONET add-drop multiplexer (SONET ADM) generic criteria.. SONET Bi-directional line-switched ring equipment generic criteria..
tailieu.vn Xem trực tuyến Tải xuống
For most networks, the costs associated with operating the network over time (such as maintenance, provi- sioning of new connections, upgrades) far outweigh the initial cost of putting in the equipment to build the network. 1.3 Optical Networks. Optical networks offer the promise to solve many of the problems discussed above.. In addition to providing enormous capacities in the network, an optical network provides a common infrastructure over which a variety of services can be delivered..
tailieu.vn Xem trực tuyến Tải xuống
From this perspective, we need to specify clearly the service interface between the optical layer and its client layers. 9 Lightpaths need to be set up and taken down as required by the client layer and as required for network maintenance.. 9 Lightpath bandwidths need to be negotiated between the client layer and the optical layer. 9 An adaptation function may be required at the input and output of the optical network to convert client signals to signals that are compatible with the optical layer
tailieu.vn Xem trực tuyến Tải xuống
All-Optical Network (AON) testbed, 655 all-optical networks . all-optical OXC configurations . See also optical crossconnects (OXCs) all-optical topology, 442. SONET standards, 724 See also standards. See also ATM layer. See also APD receivers avalanche photodiodes, 197 back-to-back interconnection, 557 backward defect indicator (BDI) signal, 510 band drop OADM architecture, 413, 416 banding. signal-spontaneous, 256 spontaneous-spontaneous, 256 See also noise.
tailieu.vn Xem trực tuyến Tải xuống
We then describe various types of optical amplifiers, which are key elements used to overcome fiber and other component losses and, in many cases, can be used to amplify signals at multiple wavelengths. Semiconductor lasers are the main transmitters used in optical communication systems. Finally, we cover wavelength converters, which are used to convert signals from one wavelength to another, at the edges of the optical network, as well as inside the network..
tailieu.vn Xem trực tuyến Tải xuống
In contrast to HFC, in FTTC, data is transmitted digitally over optical fiber from the hub, or central office, to fiber-terminating nodes called optical network units (ONUs).. The expectation is that the fiber would get much closer to the subscriber with this architecture. In the most optimistic scenario, fiber would go to each home, in which case this architecture is called fiber to the home (FTTH), and the ONUs would perform the function of the NIUs
tailieu.vn Xem trực tuyến Tải xuống
With the ever-increasing demand for higher performance in the optical network, there is a need for higher performance in optical connectors.. Connector performance is typically defined as a measurement of insertion loss that occurs when the connector is mated to a reference connector.. Manufacturers use reference connectors for production testing of insertion loss because they provide a repeatable reference point.
tailieu.vn Xem trực tuyến Tải xuống
SONET frame structure differences, 77 See also Synchronous Optical Network/. Acknowledgment Number fi eld, 282–83 Checksum fi eld, 284. Destination Port fi eld, 282 ECN fl ags, 283. fi eld illustration, 283 FIN fi eld, 283, 289 Header Length fi eld, 283 Options fi eld, 284 PSH fi eld, 283 Reserved fi eld, 283 RST fi eld, 283. Sequence Number fi eld, 282 Source Port fi eld, 282 SYN fi eld Urgent Pointer fi eld, 284 URG fi eld, 283. Window Size fi eld, 283.
tailieu.vn Xem trực tuyến Tải xuống
The characteristics of a video overlay (analog video) applied to Passive Optical Networking (PON) technology is such that the tri-plexer within the Optical Network Termination (ONT) that receives the 1550 nm optical signal converts the optical signal directly back into an analog RF signal.. To start from the beginning, the video source is first amplified electrically, and then is converted to an optical signal.
tailieu.vn Xem trực tuyến Tải xuống
ASON – Automatically Switched Optical Network, ROADM – Reconfigurable Optical Add Drop Multiplexer, PXC – Photonic Cross Connect, ASTN – Automatically Switched Transport Network, MSSP – Multi Service Transport Platform, SDH – Synchronous Digital Hierarchy, ADM – Add Drop Multiplexer, N/MWDM – National/ Metro Wavelength division Multiplexing. Native Ethernet Evolution Path. SDH Evolution Path. Wireless Access Evolution Path. Digital Radio Systems. Packet Radio Systems.
tailieu.vn Xem trực tuyến Tải xuống
CPE Customer premise equipment FDH Fiber distribution hub FDT Fiber distribution terminal FITL Fiber in the loop FTTB Fiber to the building FTTP Fiber to the premises Gbps Gigabits per second HDT Host digital terminal LEC Local exchange carrier Mbps Megabits per second ODN Optical distribution network OLT Optical line termination ONT Optical network termination ONU Optical network unit OSP Outside plant.
tailieu.vn Xem trực tuyến Tải xuống
CPE Customer premise equipment FDH Fiber distribution hub FDT Fiber distribution terminal FITL Fiber in the loop FTTB Fiber to the building FTTP Fiber to the premises Gbps Gigabits per second HDT Host digital terminal LEC Local exchange carrier Mbps Megabits per second ODN Optical distribution network OLT Optical line termination ONT Optical network termination ONU Optical network unit OSP Outside plant.
tailieu.vn Xem trực tuyến Tải xuống
It is useful to break down the optical layer into three sublayers: the optical channel layer, which deals with individual connections or lightpaths and is end to end across the network. the optical multiplex section layer, which deals with multiplexed wavelengths on a point-to-point link basis. and the optical transmission section layer, which deals with multiplexed wavelengths and the optical supervisory channel between adjacent amplifiers..