Unlock instant, AI-driven research and patent intelligence for your innovation.

Equipment, method and network system for expanding transmission distance

A technology of transmission distance and equipment, applied in the field of optical communication, to achieve the effect of reducing delay

Inactive Publication Date: 2011-04-20
HUAWEI TECH CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the research and practice of the prior art, the inventor found the following problems in the prior art: since the prior art requires both uplink and downlink signals to reach the EB, Search the parameter values ​​carried in the downlink signal that specify the transmission and end of the uplink optical signal, as well as the length of the uplink burst frame and the delimiter of the uplink signal, and then perform parallel and serial processing on the uplink and downlink signals; then perform electro-optical processing on the uplink and downlink signals respectively. Convert, and then turn on or off the transmission of the converted uplink optical signal according to the searched uplink optical signal launch and end parameter values, as well as the uplink burst frame length and the delimiter of the uplink signal; after this series of processing , the process of transmitting the optical signal to the opposite end is completed, which increases the transmission delay of the uplink and downlink systems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Equipment, method and network system for expanding transmission distance
  • Equipment, method and network system for expanding transmission distance
  • Equipment, method and network system for expanding transmission distance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] figure 1 A structural diagram of the first embodiment of the device for extending the transmission distance provided by Embodiment 1 of the present invention is shown.

[0031] The equipment for extending the transmission distance includes: a first optical module 10, a third module 30 and a second optical module 20;

[0032] The first optical module 10 is configured to convert the received first optical signal into an electrical signal; output an optical indication signal to the third module, and the optical indication signal is used to indicate whether an optical signal enters the first optical module ;

[0033] The third module 30 is configured to divide the electrical signal converted by the first optical module into a first electrical signal and a second electrical signal; and detect the second electrical signal, and when the light indicates The signal indicates that there is light entering the first optical module, and if it is detected that the continuous no-ch...

Embodiment 2

[0037] Embodiment 2 On the basis of Embodiment 1, the structure of the third module is refined, a trigger is used to reduce the rate of the electrical signal, and a counter detects the continuous no-change time of the reduced rate electrical signal. The solution is convenient and simple to implement.

[0038] The scheme of embodiment two provided by the present invention is specifically as follows:

[0039] figure 2 A structural diagram of a device for extending transmission distance provided by Embodiment 2 of the present invention is shown.

[0040]The equipment for extending the transmission distance includes: a first optical module 10, a third module 30 and a second optical module 20; in a PON network, the first optical module is connected to the ONT, and the second optical module is connected to the OLT.

[0041] The first optical module 10 is configured to convert the received first optical signal into an electrical signal; output an optical indication signal to the th...

Embodiment 3

[0058] image 3 A structural diagram of a device for extending transmission distance provided by Embodiment 3 of the present invention is shown.

[0059] Embodiment 3 A timing controller is added to the detection module on the basis of Embodiment 2. When the counter detects that the continuous no-change time of the electrical signal with a reduced rate is greater than or equal to the preset time, when the output signal cannot be recognized by the second optical module, The timing controller converts the signal output by the counter into a first control signal that the second optical module can receive.

[0060] The equipment for extending the transmission distance includes: a first optical module 10, a third module 30 and a second optical module 20; in a PON network, the first optical module is connected to the ONT, and the second optical module is connected to the OLT.

[0061] The first optical module 10 is configured to convert the received first optical signal into an ele...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The embodiment of the invention discloses equipment, a method and a network system for expanding the transmission distance. The method includes converting a first optical signal received into an electric signal and outputting an optical indication signal, the optical indication signal is utilized for indicating the incidence of optical signals; dividing the converted electric signal into a first electric signal and a second electric signal; detecting the second electric signal, when the optical indication signal indicates light is incident and the continuous no-change time of the second electric signal is more than or equal to the preset time, then a first control signal is output; converting the first electric signal into the second optical signal, the transmission of the second optical signal is stopped when the first control signal is obtained. The equipment, method and network system for expanding the transmission distance provided by the embodiment of the invention can reduce theoptical transmission time delay of the system.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a device, method and network system for extending transmission distance. Background technique [0002] Passive Optical Network (PON, Passive Optical Network-an optical network with no active elements in the signal's paths from source to destination) includes: Optical Line Terminal (OLT, Optical Line Termination) and Optical Network Termination (ONT, Optical Network Termination) ), the ONT is composed of different optical network units (ONU, Optical Network Unit). In a PON network, the transmission of optical signals from the OLT to the ONT is called the downstream direction, and the transmission of optical signals from different ONUs to the OLT is called the upstream direction. The maximum transmission distance between the optical transmission reference point of OLT and the optical reception reference point of ONU and between the optical transmission reference point of ONU ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/17H04Q11/00H04B10/24H04B10/25
Inventor 钟建国
Owner HUAWEI TECH CO LTD