WO2008113267A1

WO2008113267A1 - A method, system and device for detecting fiber connection

Info

Publication number: WO2008113267A1
Application number: PCT/CN2008/070139
Authority: WO
Inventors: Yan Liu; Wenzhong Fu
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-03-20
Filing date: 2008-01-18
Publication date: 2008-09-25
Also published as: CN101272182A

Abstract

A method for detecting fiber connection is disclosed, the method includes the following step: a route destination terminal receives a Trail Track Identification TTI byte transmitted from a route source terminal through a fiber transmission route; the route destination terminal determines whether the received TTI byte is consistent with the setting TTI byte, the setting TTI byte is a TTI byte consistent with the TTI byte setting in the route source terminal; if so, then the fiber connection of the route is correct; if else, the fiber connection of the route is incorrect. The present invention embodiment also discloses a system and an apparatus for detecting fiber connection. The technique scheme for detecting fiber connection of the present invention embodiment does not need to amend the original device, and does not need to increase additional electricity layer device, and reduces the detection cost.

Description

Method, system and device for detecting optical fiber connection

The present invention relates to fiber optic technology, and in particular to a method, system and apparatus for detecting fiber optic connections. Background of the invention

Referring to FIG. 1 , a schematic diagram of a structure of a wavelength division optical fiber transmission network includes an optical wavelength converter (OTU), a combined/divided wave unit, a comb filter (ITL, Interleaver Unit), and light. Amplifiers, Fiber Interface Units (FIUs), Fibers that connect devices, and more. The triangle in the figure indicates the light amplifier, and the trapezoid indicates the combined/divided unit.

At present, the detection of the correctness of the optical fiber connection usually adopts the method of fiber search. The method includes the following steps: First, the optical port flag signal is inserted into the source end of the optical fiber between two adjacent devices in turn, and the optical port flag signal is detected at the sink end. It is determined whether the detected source end and the sink end are connected by the optical fiber. Then, the fiber detection information of all the optical fibers in the path is uniformly aggregated to the network management tube, and the optical fiber connection in the detected path is determined to be correct. The method for inserting the optical port marking signal is: adding electrical layer processing to other devices except the OTU, such as the combining/demultiplexing unit, the ITL, the optical amplifier, and the FIU. Since the OTU has an electrical layer treatment, there is no need to add an electric layer. deal with. Adding electrical layer processing requires modifying the original device and adding additional electrical layer devices.

For example, it is detected whether the fiber connection of the path between point A and point B shown in FIG. 1 is correct, point A is the source end of the path to be detected, and point B is the sink end of the path to be detected. During the detection, the optical port flag signal is inserted at point A, that is, the electric layer processing is added to the combining/demultiplexing unit connected to the AB path, and if the fiber signal of the point B is detected from the point A, the point A and the B can be determined. Light between points The fiber is connected correctly.

During the research of the above-mentioned prior art by the R&D engineers, the following problems were found in the technology:

1) When adding electrical layer processing for detection, it is necessary to modify the original device and add additional electrical layer devices, which results in excessive detection cost.

2) The prior art detection method does not have any standard recommendation support. When the additional electrical layer devices added in the detection are not from the same manufacturer, the detection will be invalid. Summary of the invention

In view of this, the embodiments of the present invention provide a method for detecting an optical fiber connection, which can reduce the detection cost.

Embodiments of the present invention provide a system for detecting fiber connection, which can reduce detection cost.

Embodiments of the present invention provide an apparatus for detecting an optical fiber connection, which system can reduce the detection cost.

The technical solution of the embodiment of the present invention is implemented as follows:

A method of detecting a fiber connection, the method comprising the steps of:

The path sink receives the path trace identifier (TTI, Trail Trace Identifier) bytes sent by the source end of the path through the optical fiber transmission path;

The path sink determines whether the received ΤΉ byte is consistent with the set ΤΉ byte, and the set ΤΉ byte is the ΤΉ byte that is consistent with the ΤΉ byte set by the path source end. If they are consistent, the path is The fiber connection is correct. Otherwise, the fiber connection of the path is incorrect.

A system for detecting an optical fiber connection, the system comprising a path source end and a path sink end of the optical fiber transmission;

The source end of the path sends a TTI byte to the path sink, where the sent TTI byte is a path. The ΤΉ byte set by the source;

The path sink terminal determines whether the received ΤΉ byte transmitted by the source end of the path is consistent with the set ΤΤΙ byte, and the ΤΉ byte set by the path sink end is a 一致 word that is consistent with the ΤΤΙ byte set by the path source end. If the parameters are the same, the fiber connection of the path is correct. Otherwise, the fiber connection of the path is incorrect.

A device for detecting an optical fiber connection, the device comprising a receiving module and a determining module; the receiving module receiving the ΤΉ byte sent by the source end of the path, and transmitting the ΤΉ byte to the determining module; the determining module determining the received ΤΉ word transmitted by the receiving module Whether the ΤΉ byte set by the judging module is consistent, and the ΤΉ byte of the setting is a ΤΉ byte that is consistent with the ΤΉ byte set by the source end of the path. If they are consistent, the optical connection of the path is correct, otherwise, The fiber connection for this path is incorrect.

As can be seen from the foregoing solution, in the embodiment of the present invention, the ΤΉ byte is set at the source end of the optical fiber transmission path, and the ΤΤΙ byte corresponding to the ΤΤΙ byte set by the source end is set at the path sink end, and the 源 byte set at the source end of the path is set. The byte is sent to the path sink; after receiving the ΤΤΙ byte, the path sink determines whether the received ΤΉ byte is the same as the ΤΉ byte set at the path sink. If they are consistent, the fiber connection of the path is correct. Otherwise, The fiber connection for this path is incorrect. This eliminates the need to modify the original device and eliminate the need for additional electrical layer devices, reducing the cost of inspection. BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are provided to provide a further understanding of the invention, and are not intended to limit the invention. In the drawing:

1 is a schematic structural view of a wavelength division optical fiber transmission network;

Figure 2a is a schematic diagram of the transmission of the wavelength division fiber when the optical fiber is connected correctly;

Figure 2b is a schematic diagram of wavelength division fiber transmission when the fiber connection is incorrect;

3 is a flowchart of a method for detecting an optical fiber connection according to an embodiment of the present invention; 4 is a flowchart of another method for detecting an optical fiber connection according to an embodiment of the present invention;

Figure 5 is a diagram of a system for detecting fiber optic connections in accordance with an embodiment of the present invention.

Mode for carrying out the invention

In order to make the objects, technical solutions, and advantages of the embodiments of the present invention more comprehensible, the embodiments of the present invention are further described in detail below with reference to the embodiments and drawings. The illustrative embodiments of the present invention and the description thereof are intended to explain the present invention, but are not intended to limit the invention.

The basic idea of the embodiment of the present invention is: setting a ΤΉ byte that is consistent with the ΤΉ byte set by the source end on the sink end of the path that needs to detect the correctness of the optical fiber connection, and transmitting the TTI byte set at the source end to the sink end. At the sink end, it is judged whether the fiber connection of the path is correct by judging whether the received ΤΉ byte and the TTI byte set at the sink end are identical.

The TTI byte is the byte transmitted between the optical wavelength converters OTU. The ΤΉ byte is divided into three parts: a source identifier (SAPI, Souce Access Point Identifier), a sink identifier (DAPI, Destination Access Point Identifier), and a user flag. See Table 1, which is a structural table of TTI bytes. As can be seen from Table 1, the length of SAPI is 16 bytes, including SAPI[0], SAPI[1], and SAPI[15], where SAPI[0] is fixed to 0, SAPI[1], SAPI.

[2] and SAPI [3] are the national mark (CC), and the remaining part is the operator identification code assigned by the International Telecommunication Union Telecommunication Standardization Sector (ITU-T, ITU). Carrier Code) is composed of UAPC (Unique Access Point Code); DAPI is 16 bytes in length, including SAPI[0], SAPI[1], and SAPI[15], where SAPI[0] is fixed. 0, SAPI [1], SAPI [2], and SAPI [3] are CCs, and the rest are composed of ICCs and UAPCs allocated by ITU-T. The user flag is a byte that the user can customize. The ΤΉ byte can identify a network node that contains information about the source and sink of the path. TTI[0] TTI[1] ......TTI[15] TTI[16] TTI[17] ......TI[31] TTI[32] TTI[63]

SAPI[0] SAPI "11.... ..SAPI[15] DAPI[0] DAPI Π1.... ..DAPI[15] User Logo

0 cc ICC UAPC 0 CC ICC UAPC User Defined

The principle of detecting the fiber connection in the embodiment of the present invention will be described below with reference to Figs. 2a and 2b.

See Figure 2a for a schematic diagram of the WDM fiber transmission when the fiber is properly connected. In Figure 2a, the transmitting end OTU is correctly connected to the first multiplexed optical port on the customer side of the multiplexer (MUX, Multiplexer), and the receiving end OTU fiber is also correctly connected to the customer side of the demultiplexer (DEMU, Demultiplexer). A combined wave on the mouth. In the case that the wavelength division fiber shown in Figure 2a is connected correctly, the ΤΉ byte sent by the transmitting end OTU can be normally transmitted to the receiving end OTU. When the ΤΉ byte transmitted by the transmitting end OTU changes, the receiving end OTU receives the ΤΉ The bytes will change accordingly. That is to say, when the optical fiber connection is correct, the TTI byte sent by the transmitting end OTU is the same as the TTI byte received by the receiving end OTU.

See Figure 2b for a schematic diagram of the WDM fiber transmission when the fiber is connected incorrectly. Figure 2b uses the path shown in Figure 2a. In Figure 2b, the transmitting OTU is incorrectly connected to the third multiplexed optical port on the MUX client side, and the receiving OTU is still connected to the first client-side optical port of the DEMUX. At this time, if the ΤΉ byte transmitted by the transmitting OTU changes, the ΤΉ byte received by the receiving OTU does not change accordingly.

It can be seen from the analysis of Fig. 2a and Fig. 2b that when the fiber connection of the WDM path is correct, the TTI byte of the path source is changed, and the TTI byte of the path sink is changed accordingly; when the fiber connection of the WDM path is incorrect , change the TTI byte of the source of the path, the byte of the path sink will not change accordingly. This is the principle of detecting the fiber connection in the embodiment of the present invention. The following is a detailed description of the use of this principle to detect fiber optic connections in accordance with an embodiment of the present invention.

3 is a flowchart of a method for detecting an optical fiber connection according to an embodiment of the present invention, where the method includes the following steps: Step 301: Select a path that needs to detect whether the fiber connection is correct.

Step 302: The network management system saves the ΤΉ bytes set in advance at the source end of the selected path; the network management system saves the ΤΉ byte and ΤΉ alarm suppression settings set in advance on the selected path sink end, and suppresses the ΤΉ alarm.

Normally, if the path is not correctly connected, that is, the ΤΉ byte that the sink should receive is inconsistent with the 收到 byte actually received, the sink will report the ΤΉ byte mismatch alarm. Therefore, before changing the ΤΉ byte of the source to detect whether the ΤΉ byte that should be received by the sink is consistent with the ΤΤΙ byte actually received, it is necessary to save not only the 设置 byte initially set by the sink but the related alarm suppression setting. It is also necessary to suppress the ΤΉ alarm.

Step 303: Set the 应 byte to be sent at the source end of the selected path, and set the 应 byte to be received at the selected path sink end.

In this embodiment, the ΤΉ byte set for detecting the fiber connection set at the source end of the path is called a ΤΉ byte, and is set by changing the user flag in the ΤΉ byte of the source end of the path. Correspondingly, the ΤΉ byte used to detect the fiber connection set by the path sink is called the 应 Byte, which is set as follows: Change the user flag in the ΤΉ byte of the path sink. The 应 byte of the path sink is the same as the 应 byte of the path source, which is the ΤΤΙ byte that the path sink should receive when the fiber connection is correct. The ΤΤΙ byte actually received by the path sink is called the ΤΤΙ byte.

In this step, the set 应 ΤΉ byte is the same as the set 应 ΤΉ byte, that is, the user flag in the should be sent in the path source and the receivable byte in the path sink. The user logo is consistent.

Step 304: Determine whether the received ΤΉ byte and the 应应 byte of the selected path are consistent. If they are consistent, the optical connection of the selected path is correct. Otherwise, the optical connection of the selected path is incorrect.

Step 305, the network management system backfills the pre-filled step 302, which is set in advance at the source end of the path. The TTI byte, as well as the ΤΤΙ byte and ΤΤΙ alarm suppression settings set in advance on the path sink. The backfill is used to restore the ΤΤΙ byte set by the network management system at the source end of the path before the fiber connection detection, and the ΤΤΙ byte and ΤΤΙ alarm suppression settings set by the path sink.

Repeat steps 301 ~ 305 to check if the fiber connections of other paths are correct. In the embodiment of the present invention, the network management system includes other tool software capable of controlling the optical fiber transmission network.

Referring to FIG. 4, which is a flowchart of another method for detecting an optical fiber connection according to an embodiment of the present invention, the method includes the following steps:

Step 401: Select a path that needs to detect whether the fiber connection is correct.

Step 402: The network management system saves the ΤΉ bytes set in advance at the source end of the selected path; the network management system saves the ΤΉ byte and ΤΉ alarm suppression settings set in advance on the selected path sink end.

Step 403: Set the 应 byte to be sent at the source end of the selected path, and set the 应 byte to be received at the destination of the selected path.

In this step, the set should be the same as the set receivable byte, that is, the user flag part in the should be sent in the source and the user in the receivable byte set in the sink. The signs are partially consistent.

Step 404: Determine whether there is a reported mismatch alarm on the sink end of the selected path. If yes, it indicates that the fiber connection of the selected path is incorrect, or not, indicating that the fiber connection of the selected path is correct.

Here, the source should send the byte and the sink's receivable byte is set to be the same. If it is consistent, the sink will not report the mismatch warning. If the fiber connection of the selected path is incorrect, a warning is issued.

Step 405, the network management system backfilling step 402 is set in advance at the source end of the path. The TTI byte, as well as the ΤΤΙ byte and ΤΤΙ alarm suppression settings set in advance on the path sink. The backfill is used to restore the ΤΤΙ byte set by the network management system at the source end of the path before the fiber connection detection, and the ΤΤΙ byte and ΤΤΙ alarm suppression settings set by the path sink.

Repeat steps 401 ~ 405 to check if the fiber connections of other paths are correct. In the embodiment of the present invention, the network management system includes other tool software capable of controlling the optical fiber transmission network.

Referring to FIG. 5, a system for detecting an optical fiber connection according to an embodiment of the present invention includes a path source end and a path sink end.

At the source end of the path, the 宿 byte is sent to the path sink, and the 应 byte is the ΤΉ byte set by the source end of the path.

The path sink terminal determines whether the received ΤΉ byte is consistent with the ΤΉ 应 byte, and the receivable ΤΤΙ byte is a ΤΉ byte that is consistent with the ΤΉ byte set by the source end of the path. The connection is correct, otherwise the fiber connection of the path is incorrect. The path sink includes a receiving module and a judging module.

The receiving module receives the ΤΉ byte sent by the source end of the path and transmits it to the judging module. Here, the received ΤΤΙ byte sent by the source of the path is the received ΤΉ word of the path sink.

The judging module judges whether the receivable byte and the real receiving byte are consistent, and the receivable byte is a byte corresponding to the byte set by the source of the path, and if they are consistent, the fiber connection of the path Correct, otherwise, the fiber connection of the path is incorrect.

The method for determining whether the received ΤΉ byte is consistent with the 应应 byte is the method described in steps 302 to 305, or the method described in steps 402 to 405.

The technical solution of the embodiment of the present invention sets the byte to be sent at the source end of the path, and the path of the path is consistent, to determine whether the fiber connection of the selected path is correct. In this way, no need to be like the prior art In this way, the original device is modified, and no additional electrical layer device is needed, which reduces the cost of detecting the fiber connection; and, the ΤΉ byte used in this embodiment conforms to the ITU-T recommendation, and the device used in the prior art does not appear. The compatibility of the device from different vendors has caused the test to fail.

The above described specific embodiments of the present invention are further described in detail, and are intended to be illustrative of the embodiments of the present invention. The scope of the protection, any modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Claim

A method for detecting an optical fiber connection, the method comprising:

The path sink receives the path trace flag TTI byte sent by the source end of the path through the optical fiber transmission path;

The method according to claim 1, wherein before the path sink receives the ΤΉ byte sent by the source of the path through the optical fiber transmission path, the method further includes: the network management system saves the initial source of the path source Byte, and the initial TTI byte and ΤΉ alarm suppression setting of the path sink, and suppress the ΤΉ alarm;

The TTI byte is set at the source of the path.

The method according to claim 1, wherein before the path sink receives the ΤΉ byte sent by the source of the path, the method further includes: the network management system saves the initial TTI of the path source Byte, and the initial TTI byte and ΤΉ alarm suppression setting of the path sink;

The TTI byte is set at the source of the path.

4. The method according to claim 3, wherein the method for determining whether the received TTI byte is consistent with the set ΤΉ byte is:

Determine whether there is a report mismatch alarm. If yes, it indicates that the TTI byte received by the path sink is inconsistent with the ΤΉ byte set by the path sink. Otherwise, the TTI byte and path sink received by the path sink are indicated. The set TTI bytes are consistent.

The method according to claim 2 or 4, wherein after the determining whether the received ΤΉ byte is consistent with the set ΤΉ byte, the method further comprises: a network management system The initial TTI byte of the source of the path saved, and the initial TTI byte of the path sink and the ΤΉ alarm suppression setting are backfilled.

6. The method according to claim 2 or 3, wherein the setting of the TTI byte at the source of the path is implemented by changing a user flag in the ΤΉ byte;

The path sink setting ΤΉ byte is implemented by changing the user flag in the ΤΉ byte.

A system for detecting an optical fiber connection, characterized in that the system comprises a path source end and a path sink end for optical fiber transmission;

At the source end of the path, the TTI byte is sent to the path sink, and the sent TTI byte is the ΤΉ byte set by the path source;

The path sink terminal determines whether the received ΤΉ byte transmitted by the source end of the path is consistent with the set TTI byte, and the ΤΉ byte set by the path sink end is a 一致 word that is consistent with the TTI byte set by the path source end. If the parameters are the same, the fiber connection of the path is correct. Otherwise, the fiber connection of the path is incorrect.

8. The system of claim 7, wherein the path sink comprises a receiving module and a determining module;

The receiving module, after receiving the ΤΉ byte sent by the source end of the path, transmits the ΤΉ byte to the determining module; the determining module determines whether the received ΤΉ byte transmitted by the receiving module is consistent with the ΤΉ byte set by the determining module, and the setting The ΤΉ byte is the ΤΉ byte that is the same as the ΤΉ byte set by the source of the path. If they are consistent, the fiber connection of the path is correct. Otherwise, the fiber connection of the path is incorrect.

9. A device for detecting a fiber optic connection, the device comprising a receiving module and a determining module;

The receiving module, after receiving the ΤΉ byte sent by the source end of the path, transmits the ΤΉ byte to the determining module; the determining module determines whether the received ΤΉ byte is consistent with the set ΤΉ byte, and the set TTI byte is the path The TTI byte set by the source is consistent with the TTI byte. If the path is consistent, the fiber connection of the path is correct. Otherwise, the fiber connection of the path is incorrect.