Optical CDMA system

An optical code division multiple access and optical fiber technology, which is applied in the field of code division multiple access systems, can solve the problems of difficulty in mass production of ONUs and high overall cost, and achieve the effects of reducing system costs, flexible networking, and good scalability.

Active Publication Date: 2007-12-19
HUAWEI TECH CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

[0006] In order to overcome the ONUs of the OCDMA system in the prior art that are difficult to produce in batches and the overall cost of the system is relatively high, the present invention provides an OCDMA system that can produce ONUs in batches and can reduce the overall cost of the system

Method used

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Embodiment Construction

[0013] Please refer to Fig. 2, the OCDMA system of the first embodiment of the present invention includes OLT, RN (Remote Node, remote node) and a plurality of ONUs, and this OLT includes a plurality of correspondingly connected optical transceivers and optical codecs and a first optical A coupler, the multiple optical codecs are all connected to the first optical coupler; the RN includes a third optical coupler and multiple optical codecs respectively connected to the third optical coupler; each ONU Both include an optical transceiver; each optical codec of the OLT is connected to a corresponding optical codec of the RN through the first optical coupler and the third optical coupler of the RN, and each ONU is respectively connected to the corresponding RN connected to an optical codec. When the OLT processes the downlink signal, the data of multiple optical transceivers of the OLT are coded by the corresponding optical codec, mixed together by the first optical coupler and tr...

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Abstract

This invention provides an OCDMA system including an optical line terminal OLT and multiple ONU, and said OLT includes multiple connected optical transceivers and coder/decoders and a first optical coupler, said multiple coder-decoders are connected with the first optical coupler, said system also includes an optical distribution network RN containing a third coupler and multiple coders/decoders connected with it separately, and each ONU includes an optical transceiver, each coder/decoder of said OLT is connected with the third coupler of the RN and its corresponding decoder via the first coupler and each of the ONU is connected with a corresponding decoder of the RN.

Description

technical field [0001] The present invention relates to a code division multiple access system, in particular to an optical code division multiple access (Optical Code Division Multiple Access, OCDMA) system. Background technique [0002] OCDMA technology is similar in principle to code division multiple access technology. The OCDMA system assigns a unique optical orthogonal code word as the user's address code to each user. At the sending end, use the address code to perform optical orthogonal coding on the data to be transmitted, and then realize channel multiplexing; at the receiving end, use the same address code as the sending end to perform optical orthogonal decoding. [0003] The key to OCDMA technology is to select different spreading code sequences suitable for fiber channel transmission to fill the symbols to form different code division channels, that is, to use different mutually orthogonal code sequences to distinguish users and realize multiple access. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/12H04J14/00H04B10/213
CPCH04J14/005H04J3/1694
Inventor 江涛王运涛赵峻黄伟
Owner HUAWEI TECH CO LTD
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