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Optical rpeater using daisy chain method and method thereof

A technology of optical repeater and daisy chain, which is applied in the field of optical communication system to achieve the effect of reducing cost and no deviation

Inactive Publication Date: 2002-08-07
ERICSSON-LG
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Likewise, since each optical repeater and the main CDMA base station are connected separately through different optical cables, much cost is required to lay optical cables

Method used

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  • Optical rpeater using daisy chain method and method thereof
  • Optical rpeater using daisy chain method and method thereof
  • Optical rpeater using daisy chain method and method thereof

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Embodiment Construction

[0031] Reference will now be made in detail to the preferred embodiments of the invention, examples of which will be illustrated in the accompanying drawings.

[0032] FIG. 2 is an optical communication system including digital optical repeaters connected using a daisy-chain method according to the present invention.

[0033] As shown in Figure 2, the optical communication system according to the present invention includes a plurality (1-N) of optical repeaters 400 for converting RF analog signals into baseband digital signals and transmitting the baseband digital signals to the next step and for CDMA main base station 600 receiving baseband digital signal from the last optical repeater. A plurality of (1-N) optical repeaters 400 are connected by a daisy chain method.

[0034] The daisy-chain method is a structure for connecting hardware devices consecutively. For example, it is a bus linear connection method in which device A is connected to device B and device B is connect...

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Abstract

Digital signals outputted from the final optiacal repeater is transmitted to a base station after converting the RF analog signals outputted from a plurality of optical repeaters into baseband digital signals by using a daisy-chained method. The optical repeaters in the present invention and the method can reduce the cost for expending optical cables and noises cased by the optical models (E / O convertor and O / E convertor) without being influenced by the lenghth and temperature of the optical cables connecting to each optical repeaters and base stations. Otherwise, the daisy-chained method of the optical repeators includes the steps of: each optical repeater sums a converted baseband digital signal with a baseband digital signal from a prior stage; the final stage transmits the summed baseband digital signal to the base station and demodulates the baseband digital signal received by the base station.

Description

field of invention [0001] The present invention relates to an optical communication system, and more particularly to an apparatus and method for transmitting a baseband digital signal obtained from The signal output by the last optical repeater. Background technique [0002] In the past, mobile intermediaries for digital cellular and personal communication services had to expand base stations to expand voice areas and increase the range of wireless communication networks. However, since expanding base stations requires a lot of cost and installation time, recently, mobile communication middlemen who invested heavily in base station expansion in the early stage are trying to build optical repeaters instead of expanding base stations to expand voice areas and services by installing relays In terms of scope, installing repeaters is a method with a small investment to obtain multi-faceted effects in terms of cost and installation time. [0003] In areas where terminal receptio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/2575
CPCH04B10/25759H04B10/29
Inventor 柳在祐
Owner ERICSSON-LG
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