CN114285474B - Roof-adjusting information transmission method and device - Google Patents
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Abstract
The invention provides a roof-adjusting information transmission method and device, and belongs to the technical field of communication. The method for transmitting the roof-adjusting information is applied to a transmitting end and comprises the following steps: coding N paths of first top adjustment information by using N address codes with orthogonal characteristics to obtain coded second top adjustment information, wherein N is an integer greater than or equal to 1; loading the second topping information into an optical signal through a topping technology; and transmitting the optical signal to a receiving end. The technical scheme of the invention can reduce hardware cost and improve equipment integration level.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting roof-adjusting information.
Background
In the Wavelength Division Multiplexing (WDM) technology, as shown in fig. 1, multiple paths of information are loaded onto optical signals with different wavelengths, the multiple paths of optical signals are simultaneously transmitted in one optical physical circuit through an optical multiplexer, and after reaching an opposite end, the multiple paths of optical signals with different wavelengths are decomposed onto different branches through an optical demultiplexer, so as to analyze the multiple paths of information.
As shown in fig. 2, in the Code Division Multiple Access (CDMA) technology, the transmitting end modulates the transmitted signals with different (quasi-) orthogonal address codes, and the receiving end selects the corresponding signals from the mixed signals by correlation detection using the (quasi-) orthogonality of the code patterns. The method is characterized in that all users in the network use the same carrier wave and occupy the same bandwidth; the signals can be transmitted or received by all users simultaneously, the transmitting signals of all users commonly use the whole frequency band, and the transmitting signals of all users can overlap each other in time and frequency band.
In the topping technology, as shown in fig. 3, a low-speed information is loaded on a high-speed main service signal through fine tuning of parameters such as signal amplitude, frequency, phase and the like, and the high-frequency main service signal plays a role similar to carrier frequency.
The scheme is shown in figure 4, and is that baseband roof-regulating signals are loaded on main service optical signals with multiple paths of different wavelengths (lambda 1-lambda N), the baseband roof-regulating signals and the multiple paths of main service optical signals are transmitted in the same optical physical line by utilizing WDM technology, namely, the signals are loaded through an optical multiplexer, are decomposed to each branch at the opposite end through an optical demultiplexer, and roof-regulating information is received by using an optical splitter and a Photoelectric Detector (PD) at each branch.
Each branch in the existing multi-PD detection scheme needs a PD and a corresponding optical information demodulation circuit, so that the equipment integration level is low, and the hardware cost is high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a roof-adjusting information transmission method and device, which can reduce hardware cost and improve equipment integration level.
In order to solve the technical problems, the embodiment of the invention provides the following technical scheme:
in one aspect, a method for transmitting modulated top information is provided, which is applied to a transmitting end, and includes:
coding N paths of first top adjustment information by using N address codes with orthogonal characteristics to obtain coded second top adjustment information, wherein N is an integer greater than or equal to 1;
loading the second topping information into an optical signal through a topping technology;
and transmitting the optical signal to a receiving end.
In some embodiments, the transmitting the optical signal to the receiving end includes:
and transmitting the multiple paths of optical signals to a receiving end through an optical physical line by a wavelength division multiplexing technology.
In some embodiments, the information rate of the second topping information is less than or equal to 400kHz.
In some embodiments, the information rate of the second topping information is between 1MHz and 20MHz.
In some embodiments, an information rate ratio of the second topping information to the first topping information is greater than or equal to 8.
The embodiment of the invention also provides a method for transmitting the roof-adjusting information, which is applied to the receiving end and comprises the following steps:
receiving the optical signal, and performing photoelectric conversion on the received optical signal by using a photoelectric detector to obtain second roof-adjusting information;
and detecting the second top adjustment information by using N address codes with orthogonal characteristics to obtain N paths of first top adjustment information, wherein N is an integer greater than or equal to 1.
In some embodiments, after receiving the optical signal, the method further comprises:
extracting a part of optical signals from the received optical signals by an optical splitter;
the photoelectric conversion of the received optical signal by a photodetector includes:
and performing photoelectric conversion on the extracted part of the optical signal.
The embodiment of the invention also provides a device for transmitting the roof-adjusting information, which is applied to a transmitting end and comprises the following steps:
the coding module is used for coding N paths of first top adjustment information by utilizing N address codes with orthogonal characteristics to obtain coded second top adjustment information, wherein N is an integer greater than or equal to 1;
the loading module is used for loading the second topping information into the optical signal through a topping technology;
and the transmitting module is used for transmitting the optical signal to a receiving end.
In some embodiments, the transmitting module is specifically configured to transmit multiple optical signals to the receiving end through an optical physical line by using a wavelength division multiplexing technology.
In some embodiments, the information rate of the second topping information is less than or equal to 400kHz.
In some embodiments, the information rate of the second topping information is between 1MHz and 20MHz.
In some embodiments, an information rate ratio of the second topping information to the first topping information is greater than or equal to 8.
The embodiment of the invention also provides a device for transmitting the roof-adjusting information, which is applied to a receiving end and comprises the following steps:
the receiving module is used for receiving the optical signal, and performing photoelectric conversion on the received optical signal by utilizing a photoelectric detector to obtain second roof adjusting information;
and the decoding module is used for decoding the second top adjustment information by utilizing N address codes with orthogonal characteristics to obtain N paths of first top adjustment information, wherein N is an integer greater than or equal to 1.
In some embodiments, the apparatus further comprises:
an optical splitter for extracting a part of the optical signal from the received optical signal;
the receiving module is specifically configured to perform photoelectric conversion on the extracted part of the optical signal.
The embodiment of the invention also provides a roof-adjusting information transmission device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor; the processor implements the call-top information transmission method as described above when executing the program.
Embodiments of the present invention also provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in the method for transmitting roof-lifting information as described above.
The embodiment of the invention has the following beneficial effects:
in the scheme, a code division multiple access technology is introduced, N paths of first top adjustment information is encoded by utilizing N address codes with orthogonal characteristics, so that multiple paths of first top adjustment information are overlapped into one path of second top adjustment information, the second top adjustment information is loaded to an optical signal through the top adjustment technology, the optical signal is sent to a receiving end, and thus the receiving end can simultaneously receive the second top adjustment information overlapped by the multiple paths of first top adjustment information by utilizing one photoelectric detector, and the second top adjustment information is decoded to obtain multiple paths of first top adjustment information, so that the hardware cost can be reduced, and the equipment integration level can be improved.
Drawings
FIG. 1 is a schematic diagram of a wavelength division multiplexing technique;
fig. 2 is a schematic diagram of a cdma technique;
FIG. 3 is a schematic diagram of a roof-lifting technique;
FIG. 4 is a schematic diagram of a multi-channel overhead information tributary side transmission;
fig. 5 is a schematic diagram of a method for transmitting top adjustment information of a transmitting end according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a method for transmitting modulated top information at a receiving end according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a method for transmitting roof-lifting information according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of encoding of schedule information according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of loading topping information onto a main traffic optical signal according to an embodiment of the present invention;
FIG. 10 is a diagram illustrating decoding of overhead information according to an embodiment of the present invention;
fig. 11 is a schematic diagram of a roof-adjusting information transmission device at a transmitting end according to an embodiment of the present invention;
fig. 12 is a schematic diagram of a roof-adjusting information transmission device at a receiving end according to an embodiment of the present invention;
fig. 13 is a schematic diagram of a roof-adjusting information transmission device according to an embodiment of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention more apparent, the following detailed description will be given with reference to the accompanying drawings and the specific embodiments.
The embodiment of the invention provides a roof-adjusting information transmission method and device, which can reduce hardware cost and improve equipment integration level.
An embodiment of the present invention provides a method for transmitting modulated top information, which is applied to a transmitting end, as shown in fig. 5, and includes:
step 101: coding N paths of first top adjustment information by using N address codes with orthogonal characteristics to obtain coded second top adjustment information, wherein N is an integer greater than or equal to 1;
step 102: loading the second topping information into an optical signal through a topping technology;
step 103: and transmitting the optical signal to a receiving end.
In this embodiment, a code division multiple access technology is introduced, N address codes with orthogonal characteristics are used to encode N paths of first top adjustment information, so that multiple paths of first top adjustment information are overlapped to form one path of second top adjustment information, the second top adjustment information is loaded to an optical signal through the top adjustment technology, the optical signal is sent to a receiving end, so that the receiving end can simultaneously receive the second top adjustment information overlapped by multiple paths of first top adjustment information by using one photoelectric detector, and the second top adjustment information is decoded to obtain multiple paths of first top adjustment information, thereby reducing hardware cost and improving equipment integration level.
In some embodiments, the transmitting the optical signal to the receiving end includes:
and transmitting the multiple paths of optical signals to a receiving end through an optical physical line by a wavelength division multiplexing technology. Thus, multiple optical signals can be transmitted simultaneously by using one optical physical circuit, and the transmission efficiency can be improved.
And the information rate of the second crest information is less than or equal to 20MHz.
In some embodiments, the information rate of the second topping information may be less than or equal to 400kHz, that is, the time slot is 2.5 microseconds, so that an error code caused by a phase difference can be avoided, and the implementation is simple and the requirement on equipment is low. In other embodiments, the information rate of the second topping information may be 1MHz to 20MHz, for example, may be specifically 10MHz, so that the data delay may be reduced and the data volume of the transmission may be increased.
In some embodiments, the ratio of the information rate of the second topping information to the information rate of the first topping information is greater than or equal to 8, so that an address code greater than or equal to 8 bits is conveniently adopted, and demodulation accuracy is improved.
The embodiment of the invention also provides a method for transmitting the roof-adjusting information, which is applied to the receiving end, as shown in fig. 6, and comprises the following steps:
step 201: receiving the optical signal, and performing photoelectric conversion on the received optical signal by using a photoelectric detector to obtain second roof-adjusting information;
step 202: and detecting the second top adjustment information by using N address codes with orthogonal characteristics to obtain N paths of first top adjustment information, wherein N is an integer greater than or equal to 1.
In some embodiments, after receiving the optical signal, the method further comprises:
extracting a part of optical signals from the received optical signals by an optical splitter;
the photoelectric conversion of the received optical signal by a photodetector includes:
and performing photoelectric conversion on the extracted part of the optical signal.
The technical scheme of the invention is further described below with reference to the accompanying drawings and specific embodiments:
in the embodiment, the information to be loaded is encoded into a new information data sequence in a code division multiple access mode, then the new information data sequence is loaded on a main service optical signal by a top modulation technology, multi-channel top modulation information is received at the line side of a receiving end, and top modulation data of different channels are demodulated by using different code addresses, so that single PD supports multi-channel top modulation information transmission. Taking a mobile communication front-end WDM system as an example, a schematic diagram of a method for transmitting modulated top information in this embodiment is shown in fig. 7, where original modulated top information is CDMA modulated, then modulated top information is loaded on an optical signal, multiple optical signals are sent to a receiving end through an optical physical line by an optical multiplexer, the receiving end receives the optical signals, the received optical signals can be decomposed by an optical demultiplexer to obtain multiple optical signals, and at the same time, a portion of the optical signals can be extracted from the received optical signals by an optical splitter, the portion of the optical signals can be subjected to photoelectric conversion by a photoelectric detector, and CDMA demodulation is performed on the obtained electrical signals, so that N paths of original modulated top information can be obtained.
This embodiment requires adding a cdma coding technique to the roof-lifting scheme of the existing scheme. An exemplary illustration is set forth herein, with exemplary schematic diagrams shown in fig. 8-10. The overhead information is calculated with code address 1 (010101101), code address 1 sequence (01101101) is sent when the overhead information is 1, and inversion of code address 1 sequence (i.e. 1 to 0,0 to 1, 10010010) is sent when the overhead information is 0, as shown in fig. 8. The encoded topping information is then modulated into the main service optical signal by the topping technique, and this function can be integrated into an optoelectronic transceiver module (optical module), as shown in fig. 9. In the optical modules of different branches, multiplexing roof information is coded in this way by an address code sequence with orthogonal characteristics, and is loaded on a main service optical signal, and after being transmitted to an opposite end (i.e. a receiving end) by a WDM system, a trace of optical signal is extracted at a line side by an optical splitter and detected by a PD. Because the PD cannot distinguish the optical information with different wavelengths, the modulated top information after photoelectric conversion is superposition of multiple modulated top information, and the modulated top information of different channels can be demodulated by performing correlation detection on the electrical signal and different code addresses respectively, as shown in fig. 10.
Taking a mobile forward WDM system as an example, considering that phase differences exist in different channel information, the phase differences are estimated to be smaller than 0.5 microsecond, so that the information rate of encoded roof-adjusting information is smaller than or equal to 400kHz, namely the time slot is 2.5 microsecond, and error codes caused by the phase differences are avoided; the ratio of the information rate of the encoded top modulation information to the original top modulation data rate is more than or equal to 8, so that the address code with more than or equal to 8 bits is conveniently adopted, and the demodulation accuracy is improved.
In this embodiment, before the optical signal is modulated, the original modulated information is spread by using the cdma technology, and the original modulated information of different channels is demodulated by using the cdma demodulation technology through a single PD on the line side. Therefore, the single PD is utilized to realize the receiving of the multi-channel roof-switching information, and PD devices and corresponding demodulation circuits are reduced; in addition, the CDMA technology has the function of enhancing the receiving sensitivity, and improves the receiving sensitivity of the tone-roof information.
The embodiment of the invention also provides a device for transmitting the roof-adjusting information, which is applied to a transmitting end, as shown in fig. 11, and comprises:
the encoding module 31 is configured to encode N paths of first top adjustment information by using N address codes with orthogonal characteristics, so as to obtain encoded second top adjustment information, where N is an integer greater than or equal to 1;
a loading module 32, configured to load the second topping information into an optical signal through a topping technology;
and a transmitting module 33, configured to transmit the optical signal to a receiving end.
In this embodiment, a code division multiple access technology is introduced, N address codes with orthogonal characteristics are used to encode N paths of first top adjustment information, so that multiple paths of first top adjustment information are overlapped to form one path of second top adjustment information, the second top adjustment information is loaded to an optical signal through the top adjustment technology, the optical signal is sent to a receiving end, so that the receiving end can simultaneously receive the second top adjustment information overlapped by multiple paths of first top adjustment information by using one photoelectric detector, and the second top adjustment information is decoded to obtain multiple paths of first top adjustment information, thereby reducing hardware cost and improving equipment integration level.
In some embodiments, the transmitting module 33 is specifically configured to transmit the multiple optical signals to the receiving end through an optical physical line by using a wavelength division multiplexing technology. Thus, multiple optical signals can be transmitted simultaneously by using one optical physical circuit, and the transmission efficiency can be improved.
In some embodiments, the information rate of the second topping information is less than or equal to 400kHz, that is, the time slot is 2.5 microseconds, so that an error code caused by the phase difference can be avoided.
In some embodiments, the information rate of the second topping information may be less than or equal to 400kHz, that is, the time slot is 2.5 microseconds, so that an error code caused by a phase difference can be avoided, and the implementation is simple and the requirement on equipment is low. In other embodiments, the information rate of the second topping information may be 1MHz to 20MHz, for example, may be specifically 10MHz, so that the data delay may be reduced and the data volume of the transmission may be increased.
In some embodiments, the ratio of the information rate of the second topping information to the information rate of the first topping information is greater than or equal to 8, so that an address code greater than or equal to 8 bits is conveniently adopted, and demodulation accuracy is improved.
The embodiment of the invention also provides a device for transmitting the roof-adjusting information, which is applied to a receiving end, as shown in fig. 12, and comprises:
the receiving module 41 is configured to receive the optical signal, and perform photoelectric conversion on the received optical signal by using a photoelectric detector to obtain second roof adjustment information;
the decoding module 42 is configured to decode the second topping information by using N address codes with orthogonal characteristics, so as to obtain N paths of first topping information, where N is an integer greater than or equal to 1.
In some embodiments, the apparatus further comprises:
an optical splitter for extracting a part of the optical signal from the received optical signal;
the receiving module 41 is specifically configured to perform photoelectric conversion on the extracted part of the optical signal.
The embodiment of the invention also provides a roof-adjusting information transmission device, as shown in fig. 13, comprising a memory 51, a processor 52 and a computer program stored in the memory 51 and capable of running on the processor 52; the method for transmitting the roof-adjusting information according to the above embodiment is implemented when the processor executes the program, and will not be described herein.
Embodiments of the present invention also provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in the method for transmitting roof-lifting information as described above.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (11)
1. The method for transmitting the roof-adjusting information is characterized by being applied to a transmitting end and comprising the following steps:
coding N paths of first top adjustment information by using N address codes with orthogonal characteristics to obtain coded second top adjustment information, wherein N is an integer greater than 1;
loading the second topping information into an optical signal through a topping technology;
and transmitting the optical signal to a receiving end.
2. The method of transmitting the modulated top information according to claim 1, wherein the transmitting the optical signal to the receiving end includes:
and transmitting the multiple paths of optical signals to a receiving end through an optical physical line by a wavelength division multiplexing technology.
3. The method for transmitting roof-lifting information according to claim 1, wherein,
and the information rate of the second tone-roof information is less than or equal to 400kHz.
4. The method for transmitting roof-lifting information according to claim 1, wherein,
the information rate of the second topping information is between 1MHz and 20MHz.
5. The method of claim 1, wherein an information rate ratio of the second topping information to the first topping information is greater than or equal to 8.
6. The method for transmitting the roof-adjusting information is characterized by being applied to a receiving end and comprising the following steps:
receiving the optical signal, and performing photoelectric conversion on the received optical signal by using a photoelectric detector to obtain second roof-adjusting information;
and detecting the second top adjustment information by using N address codes with orthogonal characteristics to obtain N paths of first top adjustment information, wherein N is an integer greater than 1.
7. The method of roof-switching information transmission according to claim 6, wherein after receiving the optical signal, the method further comprises:
extracting a part of optical signals from the received optical signals by an optical splitter;
the photoelectric conversion of the received optical signal by a photodetector includes:
and performing photoelectric conversion on the extracted part of the optical signal.
8. The utility model provides a transfer top information transmission device which characterized in that is applied to the sender, includes:
the coding module is used for coding N paths of first top adjustment information by utilizing N address codes with orthogonal characteristics to obtain coded second top adjustment information, wherein N is an integer greater than 1;
the loading module is used for loading the second topping information into the optical signal through a topping technology;
and the transmitting module is used for transmitting the optical signal to a receiving end.
9. A roof-adjusting information transmission device, which is applied to a receiving end, and comprises:
the receiving module is used for receiving the optical signal, and performing photoelectric conversion on the received optical signal by utilizing a photoelectric detector to obtain second roof adjusting information;
and the decoding module is used for decoding the second top adjustment information by utilizing N address codes with orthogonal characteristics to obtain N paths of first top adjustment information, wherein N is an integer greater than 1.
10. A roof-adjusting information transmission device, comprising a memory, a processor and a computer program stored on the memory and capable of running on the processor; the method for transmitting roof-switching information according to any one of claims 1 to 7 is realized when the processor executes the program.
11. A computer readable storage medium having stored thereon a computer program, which when executed by a processor performs the steps in the roof-switching information transmission method according to any of claims 1-7.
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