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Passive wavelength-division mobile forward network system

A network system and pre-movement technology, applied in the field of passive wavelength division mobile fronthaul network systems, can solve problems such as difficulty in detecting branch link conditions of wavelength division devices, and achieve the effects of low cost, simple operation, and small changes.

Active Publication Date: 2017-06-09
T&S COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the passive WDM fronthaul solution, since each branch after the WDM device can only transmit a specific wavelength, it is difficult for the commonly used U-band (Ultralong wavelength band, optical band with a wavelength of 1625-1675nm) OTDR equipment to detect WDM Link status of branches after the device

Method used

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  • Passive wavelength-division mobile forward network system
  • Passive wavelength-division mobile forward network system
  • Passive wavelength-division mobile forward network system

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0035] refer to figure 1 , the passive WDM mobile fronthaul network system in this embodiment includes the central office B100, the remote R100, the trunk optical fiber 200, the central office wavelength division multiplexer B300 and the remote wavelength division multiplexer R300, and the central office B100 is Refers to the communication equipment BBU, and the remote R100 refers to the communication equipment RRU. In this embodiment, there are two BBUs and two RRUs of the communication devices, respectively B110 and B120, R110 and R120. The communication equipment BBU and RRU have their own network management (not shown in the figure), and the network management can provide a limited range of alarms when some faults occur in the network.

[0036] The communication device BBU and RRU are used to send and receive communication signals to each other. Specifically, by configuring the optical modules on the BBU and RRU, the communication device B110 sends a 1310nm signal light t...

no. 2 example

[0057] refer to figure 2 The difference between this embodiment and the first embodiment is that a first add-drop multiplexer AD610 is installed at a position close to the central office wavelength division multiplexer B300 on the trunk optical fiber 200, and a first add-drop multiplexer AD610 is installed on the trunk optical fiber 200 near the far A second add / drop multiplexer AD620 is installed at the position of the terminal wavelength division multiplexer R300.

[0058] The detection light emitted by the optical time domain reflectometer 400 enters the first add-drop multiplexer AD610 and is multiplexed with the signal light output by the central office wavelength division multiplexer B300 , and propagates on the trunk optical fiber 200 . The second add / drop multiplexer AD620 demultiplexes the detection light from the trunk optical fiber 200 and sends it to the first splitter CS510. Then, the detection light is transmitted to each branch. In this embodiment, the first ...

no. 3 example

[0063] refer to image 3 The difference between this embodiment and the first embodiment is that a second add / drop multiplexer AD620 is installed at a position where the trunk optical fiber 200 is close to the remote wavelength division multiplexer R300. The second add / drop multiplexer AD620 demultiplexes the detection light from the trunk optical fiber 200 and sends it to the first splitter CS510. Then, the detection light is transmitted to each branch. In this embodiment, the first splitter CS510 is a power splitter.

[0064] In this embodiment, the central office wavelength division multiplexer B300 is the first wavelength division multiplexing device, the remote wavelength division multiplexer R300 and the second add-drop multiplexer AD620 constitute the second wavelength division multiplexing device, and the second wavelength division multiplexing device A splitter CS510 and a third add / drop multiplexer AD630 constitute an optical transmission unit.

[0065] It can be ...

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Abstract

The present invention provides a passive wavelength-division mobile forward network system. The system is characterized by comprising a local end, a distal end, and a trunk optical fiber. The system further comprises a first conveying unit used for conveying the detection light to the trunk optical fiber at one end of the trunk optical fiber; a second conveying unit used for conveying the detection light to each branch of the distal end through the trunk optical fiber at the other end of the trunk optical fiber; a reflector disposed at the tail end of each branch of the distal end and used for reflecting the detection light. The detection light is synthesized to the trunk optical fiber through the first conveying unit and then the detection light is conveyed to each branch of the distal end through the trunk optical fiber by the second conveying unit. Finally, the detection light is returned along an original path by the reflector. In this way, whether the trunk optical fiber and each branch of the distal end are faulty or not are detected by the detection light. The system has little modification on the network and fewer elements are added. Therefore, the advantages of simple operation and low cost are realized.

Description

technical field [0001] The invention relates to the field of passive wavelength division mobile fronthaul network, in particular to a passive wavelength division mobile fronthaul network system. Background technique [0002] With the rapid popularization of smart terminals and the rapid development of the mobile Internet, mobile services are growing exponentially, and operators' mobile networks are facing greater pressure to transmit data services. C-RAN (Cloud / Centralized Radio Access Network, centralized radio access network) has become an important trend in the development of wireless fronthaul networks. [0003] The passive WDM fronthaul solution is to combine multiple signals through CWDM / DWDM (Coarse Wavelength Division Multiplexer, coarse wavelength division multiplexer; Dense Wavelength Division Multiplexer, dense wavelength division multiplexer) and then transmit them through optical fiber, so that Expand the capacity of the mobile network with limited fiber resour...

Claims

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Application Information

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IPC IPC(8): H04B10/071H04B10/25H04J14/02
CPCH04B10/071H04B10/2589H04J14/0202
Inventor 侯丹黄舒吴金东
Owner T&S COMM
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