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System and method for distributing digital signals over long-distance switched optical transport networks

An optical transmission network, digital signal technology, applied in transmission systems, electromagnetic wave transmission systems, optical fiber transmission, etc., to achieve the effect of improving sensitivity

Inactive Publication Date: 2012-11-07
TELEFONICA SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to solve said disadvantages, expensive 3R regenerators arranged along said several thousand kilometers can be found in the prior art

Method used

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  • System and method for distributing digital signals over long-distance switched optical transport networks
  • System and method for distributing digital signals over long-distance switched optical transport networks
  • System and method for distributing digital signals over long-distance switched optical transport networks

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Embodiment Construction

[0062] Embodiments of the present invention are described below with reference to the numerals employed in the drawings.

[0063] figure 1 A diagram showing a high-level IPTV service architecture implementing the present invention. The high-level architecture includes an IPTV headend (1) of a main network, a long-distance transmission network (2), a local IPTV node (3), network access (4), and a piece of user equipment (5). The scope of the invention is included within the long-distance transmission network (2) for which the invention comprises a transmitter located in the IPTV head-end (1) of the main network and a local IPTV node (3 ) in the receiver.

[0064] figure 2 Shows a block diagram comprising IPTV headend (1) of main network, transmitter module (7) defined by the invention, wavelength switched optical network WSON (8) with optical multicast capability, receiver module defined by the invention (9), and the local IPTV node (3).

[0065] image 3 A prior art is ...

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Abstract

The invention relates to a system and a method for distributing digital signals over wavelength-switched optical transport networks with long-distance optical multicasting capability, which includes a transmitter module and a receiver module in the primary headend and in the local node, respectively, for multicasting of IPTV channels with HDTV, UHDTV and 3D-TV signals. The transmitter module includes an Ethernet switch, three DPSK modulators and a DWDM optical multiplexer. The receiver module includes an Ethernet switch, three DPSK demodulators and a DWDM optical demultiplexer. In a novel manner, both modules combine 2 Gbps digital transmission, RZ-DPSK modulation and optical multicasting over a wavelength-switched optical network (WSON).

Description

technical field [0001] As expressed in the title of this specification, the present invention relates to a system and method for distributing digital signals over a long distance switched optical transmission network. The main field of application is: distribution of digital television signals via Internet Protocol Television (IPTV) over the optical network of the provider of digital television signals to local nodes providing services to end users. To this end, the invention comprises a system comprising a transmitter module located in the headend of the main network of the service provider and a receiver module located in said local node. Background technique [0002] The volume of IPTV traffic over a long distance switched optical transport network does not depend on the number of users, but on the number, definition and encoding of television channels transmitted over said network. [0003] Digital TV services occupy bandwidths of 10Mbps, 400Mbps, and 100Mbps for HDTV, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/02H04B10/04H04B10/06H04B10/2575
CPCH04J14/0212H04J14/0271H04J14/0282H04J14/0239H04J14/021H04B10/25751H04J14/0238H04J14/0286H04J14/0227
Inventor 胡安·佩德罗·费尔南德斯-帕拉西奥斯希门尼斯弗朗切斯科·哈维尔·希门尼斯奇孔奥斯卡·冈萨雷斯德迪奥斯
Owner TELEFONICA SA
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