CN117614531A - Optical fiber communication test system and test method - Google Patents
Optical fiber communication test system and test method Download PDFInfo
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- CN117614531A CN117614531A CN202311540098.5A CN202311540098A CN117614531A CN 117614531 A CN117614531 A CN 117614531A CN 202311540098 A CN202311540098 A CN 202311540098A CN 117614531 A CN117614531 A CN 117614531A
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- 238000012360 testing method Methods 0.000 title claims abstract description 183
- 239000013307 optical fiber Substances 0.000 title claims abstract description 172
- 238000004891 communication Methods 0.000 title claims abstract description 154
- 238000010998 test method Methods 0.000 title abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 53
- 239000000284 extract Substances 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims description 88
- 238000012545 processing Methods 0.000 claims description 67
- 239000000835 fiber Substances 0.000 claims description 19
- 238000012795 verification Methods 0.000 claims description 13
- 238000013524 data verification Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 6
- 241000282326 Felis catus Species 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
Abstract
The invention belongs to the technical field of communication, and discloses an optical fiber communication test system and a test method, wherein the test system comprises a first optical fiber communication module and a second optical fiber communication module; the first optical fiber communication module randomly sends first test data generated by each terminal to the second optical fiber communication module for uplink transmission; the second optical fiber communication module combines the received first test data into second test data, and continuously sends the second test data to the first optical fiber communication module for downlink transmission; the first optical fiber communication module extracts effective second test data according to the protocol and sends the effective second test data to each terminal of the first optical fiber communication module. The test system and the test method provided by the invention adopt the first optical fiber communication module and the second optical fiber communication module to carry out uplink transmission and downlink transmission, simplify the test equipment of optical fiber communication, reduce the cost of the test equipment and realize more flexible debugging.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to an optical fiber communication test system and a test method.
Background
With the continuous development of network technology, the optical fiber communication mode of the optical fiber home (Fiber To The Home, FTTR) is widely applied to various places, especially large-scale places such as markets, airports and hotels due to the advantages of high transmission rate, wide signal coverage range and the like, and the function of the full-area coverage of the WIFI network can be realized by using the FTTR optical fiber communication mode.
However, in the test of FTTR optical fiber communication, most of the test systems are based on a set of equipment such as a computer, a switch, FTTR optical cat equipment, an optical distribution network (Optical Distribution Network, OND), an optical line terminal (Optical Line Terminal, OLT) and the like, in the preliminary stage of the FTTR optical fiber communication test, if the system is directly built by the FTTR optical cat equipment, the cost of customizing the communication function test is relatively high, and the flexible debugging of the early-stage scheme is inconvenient, the test platform is single, the test efficiency is low, the labor cost is high, and in view of the fact, how to reduce the cost of the FTTR optical fiber communication test, and the flexibility of the test scheme is improved, so the problem to be solved urgently.
Disclosure of Invention
In view of the above technical problems, the present invention provides an optical fiber communication testing system and a testing method, which are used for solving the technical problems.
In a first aspect, the present invention provides an optical fiber communication test system, the system comprising a first optical fiber communication module and a second optical fiber communication module;
the first optical fiber communication module randomly sends first test data generated by each terminal to the second optical fiber communication module for uplink transmission;
the second optical fiber communication module combines the received first test data into second test data, and continuously sends the second test data to the first optical fiber communication module for downlink transmission;
and the first optical fiber communication module extracts effective second test data according to a protocol and sends the effective second test data to each terminal of the first optical fiber communication module.
Preferably, the first optical fiber communication module comprises an optical network processing unit and a first optical fiber transceiver unit;
the optical network processing unit is used for generating first test data and sending the first test data to the first optical fiber transceiver unit;
the first optical fiber transceiver unit is used for sending the first test data to the optical network processing unit for data verification, and the outside of the optical network processing unit is connected with the first optical fiber transceiver unit.
Preferably, the second optical fiber communication module includes an optical line processing unit and a second optical fiber transceiver unit;
the second optical fiber transceiver unit is used for receiving the first test data after the optical network processing unit performs data verification and sending the first test data after verification to the optical line processing unit;
the optical line processing unit is used for combining the first test data after verification into second test data, and the outside of the optical line processing unit is connected with the second optical fiber transceiver unit.
Preferably, the first optical fiber transceiver unit and the second optical fiber transceiver unit are high-speed serial transceivers.
Preferably, before the optical line processing unit receives the checked first test data, the optical network processing unit performs reset control on the optical line processing unit through an interconnection line.
Preferably, the first test data is burst data or continuous data.
Preferably, when the first test data is burst data, the optical line processing unit performs four times oversampling processing on the received burst data.
Preferably, the clock chips in the first optical fiber communication module and the second optical fiber communication module are homologous clock chips.
In a second aspect, the present invention further provides a method for testing optical fiber communication, including:
acquiring first test data generated by each terminal of a first optical fiber communication module, and randomly transmitting the first test data to a second optical fiber communication module for uplink transmission;
the second fiber optic communication module combines the received first test data into second test data,
continuously sending the second test data to the first optical fiber communication module for downlink transmission;
and the first optical fiber communication module extracts effective second test data according to a protocol and sends the effective second test data to each terminal of the first optical fiber communication module.
Preferably, the step of randomly sending the first test data to the second optical fiber communication module for uplink transmission includes:
transmitting first test data generated by an optical network processing unit in a first optical fiber communication module to a receiving end of an optical line processing unit of a second optical fiber communication module;
after resetting the receiving end of the optical line processing unit, receiving first test data sent by the optical network processing unit;
and performing data verification on the first test data received in the optical line processing unit, and performing quadruple oversampling on the verified first test data.
Compared with the prior art, the optical fiber communication test system and the test method provided by the invention have the advantages that the first optical fiber communication module and the second optical fiber communication module are adopted for uplink transmission and downlink transmission, so that the test equipment of FTTR optical fiber communication is simplified, the cost of the test equipment is reduced, the flexible debugging of a front-stage scheme is convenient, if the uplink transmission data type is changed, the test efficiency of the FTTR optical fiber communication is improved, and the manpower test cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present invention, but not all embodiments, and other drawings obtained according to these drawings without inventive effort are all within the scope of the present invention.
FIG. 1 is a schematic diagram of a hardware system of an optical fiber communication test system according to an embodiment of the present invention;
fig. 2 is a schematic hardware structure of a first optical fiber communication module according to an embodiment of the present invention;
fig. 3 is a schematic hardware structure of a second optical fiber communication module according to an embodiment of the present invention;
fig. 4 is a diagram of a test result of uplink transmission of an optical fiber communication system according to an embodiment of the present invention;
FIG. 5 is a schematic flow chart of a method for testing communication based on an optical fiber according to an embodiment of the present invention;
fig. 6 is a schematic flow chart of an uplink transmission of optical fiber communication according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In order that the manner in which the above recited invention is attained and can be understood in detail, a more particular description of the invention, briefly summarized below, may be had by reference to embodiments thereof which are illustrated in the appended drawings; this is not the only form of practicing or implementing the invention as embodied. The description covers the features of the embodiments and the method steps and sequences for constructing and operating the embodiments. However, other embodiments may be utilized to achieve the same or equivalent functions and sequences of steps. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.
In the description of the embodiments of the present invention, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: in addition, in the description of the embodiments of the present invention, "plural" means two or more, and other words and the like, it is to be understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention, and embodiments of the present invention and features in the embodiments may be combined with each other without conflict.
In order to solve the problem of high FTTR optical fiber communication test cost, the invention provides an optical fiber communication test system, please refer to fig. 1, which is a hardware system schematic diagram of the optical fiber communication test system provided by the embodiment of the invention, wherein the system comprises a first optical fiber communication module and a second optical fiber communication module, and the first optical fiber communication module randomly transmits first test data generated by each terminal to the second optical fiber communication module for uplink transmission; the second optical fiber communication module combines the received first test data into second test data, and continuously sends the second test data to the first optical fiber communication module for downlink transmission; and the first optical fiber communication module extracts effective second test data according to a protocol and sends the effective second test data to each terminal of the first optical fiber communication module. In the embodiment of the invention, two FPGA single boards are adopted as the first optical fiber communication module and the second optical fiber communication module to carry out uplink transmission and downlink transmission, and the uplink transmission and downlink transmission processes between the optical modem and the optical line terminal are simulated, so that the test equipment of FTTR optical fiber communication is simplified, and the test cost is reduced.
The second optical fiber communication module combines the received first test data into second test data, the first test data are test data sent randomly by the multi-path terminal, and the second optical fiber communication module can combine the test data sent by the multi-path terminal into single-path data in the process of alternating uplink transmission, wherein the combined single-path data are the second test data. In addition, the first optical fiber communication module extracts valid second test data according to a protocol, wherein the protocol is a Multi-point control protocol (Multi-Point Control Protocol, MPCP), the MPCP defines a control mechanism between the optical network unit and the optical line terminal, and valid transmission and reception of the test data can be coordinated through the MPCP.
It should be noted that, in the optical fiber communication test system in the embodiment of the present invention, a segment of test data is generated by an FPGA board to simulate the uplink transmission of the FTTR optical modem terminal to send the test data, and another FPGA board is used to receive the test data by using an optical line terminal unit, where the principle of the uplink transmission of the FTTR optical modem is that multiple optical network units transmit data to the optical line terminal unit from the optical fiber through the passive optical splitter, the uplink transmission time of each optical network unit is random, the optical line terminal unit is responsible for gathering multiple paths of data sent by each terminal into one path of data in the process of alternately uplink transmitting the data by the multiple optical network units, the optical signal is transmitted to multiple downstream optical network units from the optical fiber through the passive optical splitter in the downlink transmission process of the optical line terminal without distinction, and the data downlink transmission is continuous, where the data received by each optical network unit is identical, and the optical network unit extracts valid data according to the MPCP protocol requirement and sends the extracted valid data to all devices connected to the optical network unit.
As an implementation manner, please refer to fig. 2, fig. 2 is a schematic hardware structure diagram of a first optical fiber communication module according to an embodiment of the present invention, where the first optical fiber communication module includes an optical network processing unit and a first optical fiber transceiver unit; the optical network processing unit is used for generating first test data and sending the first test data to the first optical fiber transceiver unit; the first optical fiber transceiver unit is used for sending the first test data to the optical network processing unit for data verification, and the outside of the optical network processing unit is connected with the first optical fiber transceiver unit.
Specifically, the data generating signal of the optical network processing unit is used for generating first test data and sending the first test data to the sending end of the first optical fiber transceiver, the sending end of the first optical fiber transceiver sends the first test data to the optical network processing unit, the data checking signal of the optical network processing unit performs format checking on the first test data and sends the first test data after the format checking to the receiving end of the first optical fiber transceiver, and the receiving end of the first optical fiber transceiver sends the first test data to the second optical fiber communication module.
As an implementation manner, please refer to fig. 3, fig. 3 is a schematic hardware structure diagram of a second optical fiber communication module according to an embodiment of the present invention, where the second optical fiber communication module includes a second optical fiber transceiver and an optical line processing unit; the second optical fiber transceiver is used for receiving the first test data after the verification of the optical network processing unit and sending the first test data after the verification to the optical line processing unit; the optical line processing unit is used for combining the first test data after verification into second test data, and the outside of the optical line processing unit is connected with the second optical fiber transceiver.
Specifically, the receiving end of the second optical fiber transceiver is configured to receive the first test data after the verification by the optical network processing unit, send the first test data after the verification to the optical line processing unit, combine the first test data after the verification into the second test data by the data generation signal of the optical line processing unit, perform format verification on the second test data by the data verification signal of the optical line processing unit, send the second test data after the format verification to the receiving end of the second optical fiber transceiver, and send the second test data to the terminal device by the receiving end of the second optical fiber transceiver.
As an embodiment, the first fiber optic transceiver unit and the second fiber optic transceiver unit are high-speed serial transceivers. In the embodiment of the invention, the first optical fiber transceiver unit and the second optical fiber transceiver unit are arranged as high-speed serial transceivers, the channel capacity of a transmission medium is fully utilized by adopting a point-to-point serial communication technology, the number of required transmission channels and device pins is reduced, and the transmission speed of signals is improved, so that the cost of optical fiber communication is greatly reduced.
As an implementation manner, before the optical line processing unit receives the checked first test data, the optical network processing unit performs reset control on the optical line processing unit through the interconnection line, and in the uplink transmission process of the system, the optical network processing unit performs reset control on the optical line processing unit through the interconnection line, so that the data type in the uplink transmission process can be changed at any time according to actual needs.
As an implementation manner, the first test data is burst data or continuous data, and in this embodiment of the present invention, a test environment of an optical fiber communication system may be simulated by using two FPGA boards, where the burst data indicates that the system intermittently transmits data, and the continuous data indicates that the system continuously transmits data. The FPGA is used as a logic programmable device, the code programming is convenient, the data type and the data content of the uplink transmission of the system can be changed, if the uplink transmission is performed by using the cat equipment, the data defined according to the protocol cannot be changed at will, and the uplink transmission of the system can send any data, so that the problem analysis and debugging of the scheme customization preliminary stage are facilitated, the test efficiency is improved, and the human test cost is reduced.
As one embodiment, when the first test data is burst data, the optical line processing unit performs four times oversampling processing on the received burst data. The clock recovery circuit of the hard core of the high-speed serial transceiver does not support sampling of burst serial data, and in the embodiment of the invention, the clock recovery circuit of the high-speed serial transceiver and an equalization circuit module matched with the clock recovery circuit of the high-speed serial transceiver can be closed, reset detection in the high-speed serial transceiver is closed, and four times oversampling processing is directly carried out on data from a transmitting end.
It should be noted that if the system directly samples edge information of data, the received data may be inaccurate, where the data sending rate of the sending end of the first optical fiber transceiver is 1.244160Gbps, so that the setting rate of the receiving end of the second optical fiber transceiver is 4.976640Gbps, which is four times that of the sending end of the first optical fiber transceiver, and the burst data is sampled by four times over-sampling, so as to find correct data.
As one embodiment, the clock chips in the first fiber optic communication module and the second fiber optic communication module are homologous clock chips. In the embodiment of the invention, the same clock is adopted to provide clock signals for the first optical fiber communication module and the second optical fiber communication module.
In order to verify the validity of the optical fiber communication test system provided by the invention, uplink transmission data verification is performed on the built system, the invention performs data sampling on three groups of test data on the system, please refer to fig. 4, fig. 4 is a test result diagram of uplink transmission of the optical fiber communication system provided by the embodiment of the invention, and it can be seen from fig. 4 that the verification of the three groups of sampled test data is correct and meets the requirements. And the second optical fiber communication module transmits continuous test data in the downlink transmission process, and the continuous test data is the same as the conventional data for receiving and transmitting.
The invention provides an optical fiber communication test system, which comprises a first optical fiber communication module and a second optical fiber communication module; the first optical fiber communication module randomly sends first test data generated by each terminal to the second optical fiber communication module for uplink transmission; the second optical fiber communication module combines the received first test data into second test data, and continuously sends the second test data to the first optical fiber communication module for downlink transmission; and the first optical fiber communication module extracts effective second test data according to a protocol and sends the effective second test data to each terminal of the first optical fiber communication module. According to the optical fiber communication test system provided by the invention, the first optical fiber communication module and the second optical fiber communication module are adopted for uplink transmission and downlink transmission, so that the test equipment of FTTR optical fiber communication is simplified, the cost of the test equipment is reduced, flexible debugging of a front-stage scheme is convenient, for example, the uplink transmission data type is changed, the test efficiency of the FTTR optical fiber communication is improved, and the manpower test cost is reduced.
Based on the above optical fiber communication test system, an embodiment of the present invention provides an optical fiber communication test method, please refer to fig. 5, fig. 5 is a flow chart of the optical fiber communication test method provided by the embodiment of the present invention, the method specifically includes the following steps:
s101, acquiring first test data generated by each terminal of a first optical fiber communication module, and randomly transmitting the first test data to a second optical fiber communication module for uplink transmission; s102, the second optical fiber communication module combines the received first test data into second test data, and continuously sends the second test data to the first optical fiber communication module for downlink transmission; s103, the first optical fiber communication module extracts effective second test data according to a protocol, and sends the effective second test data to each terminal of the first optical fiber communication module.
As an implementation manner, the first test data is randomly sent to the second optical fiber communication module for uplink transmission, refer to fig. 6, and fig. 6 is a schematic flow chart of uplink transmission based on optical fiber communication according to an embodiment of the present invention, which includes the following steps:
s201, first test data generated by an optical network processing unit in a first optical fiber communication module is sent to a receiving end of an optical line processing unit of a second optical fiber communication module; s202, after resetting control is carried out on a receiving end of the optical line processing unit, first test data sent by the optical network processing unit are received; s203, performing data verification on the first test data received in the optical line processing unit, and performing quadruple oversampling on the verified first test data.
The optical fiber communication test method provided by the embodiment of the invention can execute the technical scheme of the optical fiber communication test system in any embodiment, and the implementation principle and beneficial effects of the optical fiber communication test system are similar to those of the optical fiber communication test system, and can be seen from the implementation principle and beneficial effects of the optical fiber communication test system, and the detailed description is omitted.
In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units. The foregoing is only the embodiments of the present invention, and the patent scope of the invention is not limited thereto, but is also covered by the patent protection scope of the invention, as long as the equivalent structures or equivalent processes of the present invention and the contents of the accompanying drawings are changed, or the present invention is directly or indirectly applied to other related technical fields.
Although the present invention has been described in terms of the preferred embodiments, it should be understood that the present invention is not limited to the specific embodiments, but is capable of numerous modifications and equivalents, and alternative embodiments and modifications of the embodiments described above, without departing from the spirit and scope of the present invention.
Claims (10)
1. An optical fiber communication test system is characterized in that the system comprises a first optical fiber communication module and a second optical fiber communication module;
the first optical fiber communication module randomly sends first test data generated by each terminal to the second optical fiber communication module for uplink transmission;
the second optical fiber communication module combines the received first test data into second test data, and continuously sends the second test data to the first optical fiber communication module for downlink transmission;
and the first optical fiber communication module extracts effective second test data according to a protocol and sends the effective second test data to each terminal of the first optical fiber communication module.
2. The fiber optic communication test system of claim 1, wherein the first fiber optic communication module comprises an optical network processing unit and a first fiber optic transceiver unit;
the optical network processing unit is used for generating first test data and sending the first test data to the first optical fiber transceiver unit;
the first optical fiber transceiver unit is used for sending the first test data to the optical network processing unit for data verification, and the outside of the optical network processing unit is connected with the first optical fiber transceiver unit.
3. The fiber optic communication test system of claim 2, wherein the second fiber optic communication module comprises an optical line processing unit and a second fiber optic transceiver unit;
the second optical fiber transceiver unit is used for receiving the first test data after the optical network processing unit performs data verification and sending the first test data after verification to the optical line processing unit;
the optical line processing unit is used for combining the first test data after verification into second test data, and the outside of the optical line processing unit is connected with the second optical fiber transceiver unit.
4. The fiber optic communication test system of claim 3, wherein the first fiber optic transceiver unit and the second fiber optic transceiver unit are high-speed serial transceivers.
5. The optical fiber communication test system according to claim 3, wherein the optical line processing unit performs a reset control on the optical line processing unit through an interconnection line before receiving the verified first test data.
6. The fiber optic communication test system of claim 5, wherein the first test data is burst data or continuous data.
7. The optical fiber communication test system according to claim 6, wherein when the first test data is burst data, the optical line processing unit performs four-time oversampling processing on the received burst data.
8. The fiber optic communication test system of claim 1, wherein the clock chips in the first and second fiber optic communication modules are homologous clock chips.
9. A method for testing communication based on optical fibers, comprising:
acquiring first test data generated by each terminal of a first optical fiber communication module, and randomly transmitting the first test data to a second optical fiber communication module for uplink transmission;
the second fiber optic communication module combines the received first test data into second test data,
continuously sending the second test data to the first optical fiber communication module for downlink transmission;
and the first optical fiber communication module extracts effective second test data according to a protocol and sends the effective second test data to each terminal of the first optical fiber communication module.
10. The method of claim 9, wherein the step of randomly sending the first test data to the second optical fiber communication module for uplink transmission comprises:
transmitting first test data generated by an optical network processing unit in a first optical fiber communication module to a receiving end of an optical line processing unit of a second optical fiber communication module;
after resetting the receiving end of the optical line processing unit, receiving first test data sent by the optical network processing unit;
and performing data verification on the first test data received in the optical line processing unit, and performing quadruple oversampling on the verified first test data.
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