CN110768717A - Free space optical communication system - Google Patents
Free space optical communication system Download PDFInfo
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- CN110768717A CN110768717A CN201810835694.9A CN201810835694A CN110768717A CN 110768717 A CN110768717 A CN 110768717A CN 201810835694 A CN201810835694 A CN 201810835694A CN 110768717 A CN110768717 A CN 110768717A
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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
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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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
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Abstract
A free-space optical communication system, comprising: the physical interface transceiver is provided with a first serial interface used for being connected with a power grid port, and a second serial interface used for being connected with the optical transceiver; and the controller is connected with the physical interface transceiver and is used for generating corresponding transceiver configuration data and transmitting the transceiver configuration data to the physical interface transceiver so as to realize the configuration of a data channel between the first serial interface and the second serial interface of the physical interface transceiver. The system can realize flexible configuration of the ports in a software mode, thereby realizing data interaction between optical communication with different wavelengths and power grid port communication, and being more flexible compared with the existing communication system. Meanwhile, the system can realize multi-channel photoelectric conversion, so that the use amount of the single board can be effectively reduced, and the installation space and the hardware cost are greatly saved.
Description
Technical Field
The invention relates to the technical field of vehicle communication, in particular to a free space optical communication system.
Background
Free Space Optics (FSO) technology uses light with higher carrier frequency as an information carrier to replace radio frequency/microwave link, which is a promising wireless communication technology. The high bandwidth of the spectrum has the advantages of high data rate, free and unlimited frequency spectrum exceeding 300GHz, high safety, easy deployment and the like, so the free space optical communication technology can be used as an effective solution for large-bandwidth wireless communication of the train and the ground.
The internal network communication on the train adopts a hundred mega or giga Ethernet electric interface, and if the communication data of the train network is to be transmitted in a free optical communication mode, a special single board is needed to realize the conversion of the electric-optical signals.
The traditional free optical communication system single board only provides the single-function electric-optical conversion function, if the multi-path different optical-electric arbitrary conversion function is to be realized, then a plurality of different single boards are required to be combined. When the single board is used in the rail transit field, a large space is needed for installing the different single boards, and thus, the installation space and hardware resources are greatly wasted.
Disclosure of Invention
To solve the above problems, the present invention provides a free space optical communication system, comprising:
the physical interface transceiver is provided with a first serial interface used for being connected with a power grid port, and a second serial interface used for being connected with the optical transceiver;
and the controller is connected with the physical interface transceiver and is used for generating corresponding transceiver configuration data and transmitting the transceiver configuration data to the physical interface transceiver so as to realize the configuration of a data channel between the first serial interface and the second serial interface of the physical interface transceiver.
According to one embodiment of the invention, the system includes a plurality of physical interface transceivers coupled to the controller, each physical interface transceiver for coupling to a corresponding optical transceiver and a power grid port, respectively.
According to an embodiment of the invention, the transceiver configuration data comprises register configuration data, and the controller is configured to adjust a configuration of a corresponding register within the physical interface transceiver using the register configuration data, thereby enabling configuration of a data channel between the first serial interface and the second serial interface of the physical interface transceiver.
According to one embodiment of the invention, the system further comprises:
a serial-parallel conversion module, which is connected to the optical transceiver through its own serial interface, and is configured to convert serial interface data transmitted by the optical transceiver into corresponding parallel interface data and output the parallel interface data through its own parallel interface, or convert parallel interface data received by its own parallel interface into corresponding serial interface data and transmit the serial interface data to the optical transceiver through its own serial interface;
a data channel selection module, a first communication end of which is connected with the parallel interface of the serial-parallel conversion module, and a second communication end of which is connected with the parallel interface of the physical interface transceiver, and is used for realizing the selection of a data transmission channel between the parallel interface of the serial-parallel conversion module and the parallel interface of the physical interface transceiver;
the physical interface transceiver is configured to convert parallel data received through a self parallel interface into corresponding serial data and transmit the serial data to the power grid port through the first serial interface, or convert serial data transmitted by the power grid port into corresponding parallel data and output the parallel data through the self parallel interface.
According to an embodiment of the present invention, the serial-to-parallel conversion module, the data path selection module and the controller are integrated in the same chip.
The present invention also provides a free space optical communication system, the system comprising:
the serial-parallel conversion module is used for being connected with an optical transceiver through a serial interface of the serial conversion module, converting serial interface data transmitted by the optical transceiver into corresponding parallel interface data and outputting the parallel interface data through a parallel interface of the serial conversion module, or converting parallel interface data received by a parallel interface of the serial conversion module into corresponding serial interface data and transmitting the serial interface data to the optical transceiver through a serial interface of the serial conversion module;
the physical interface transceiver is used for connecting a first serial interface with a power grid port;
a data channel selection module, a first communication end of which is connected with the parallel interface of the serial-parallel conversion module, and a second communication end of which is connected with the parallel interface of the physical interface transceiver, and is used for realizing the selection of a data transmission channel between the parallel interface of the serial-parallel conversion module and the parallel interface of the physical interface transceiver;
the physical interface transceiver is configured to convert parallel data received through a self parallel interface into corresponding serial data and transmit the serial data to the power grid port through the first serial interface, or convert serial data transmitted by the power grid port into corresponding parallel data and output the parallel data through the self parallel interface.
According to one embodiment of the invention, the system further comprises:
a controller connected to the physical interface transceiver for generating and transmitting corresponding transceiver configuration data to the physical interface transceiver;
the physical interface transceiver further includes a second serial interface, the physical interface transceiver configured to adjust a data channel between the first serial interface and the second serial interface according to the transceiver configuration data.
According to an embodiment of the invention, the transceiver configuration data comprises register configuration data, and the controller is configured to adjust a configuration of a corresponding register within the physical interface transceiver using the register configuration data, thereby enabling configuration of a data channel between the first serial interface and the second serial interface of the physical interface transceiver.
According to an embodiment of the present invention, the serial-to-parallel conversion module, the data path selection module and the controller are integrated in the same chip.
According to one embodiment of the invention, the system includes a plurality of physical interface transceivers, each for connecting with a corresponding optical transceiver and a power grid port, respectively
The free space optical communication system provided by the invention can realize flexible configuration of the port in a software mode, thereby realizing data interaction between optical communication with different wavelengths and power grid port communication (such as a gigabit power grid port), and being more flexible compared with the existing communication system.
Meanwhile, the communication system can realize multi-channel optical-electrical conversion, so that the use amount of the single board can be effectively reduced, and the installation space and the hardware cost are greatly saved. In addition, the reduction of the number of the single boards is also beneficial to reducing the workload in the system maintenance process, thereby reducing the system maintenance difficulty.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required in the description of the embodiments or the prior art:
FIG. 1 is a schematic block diagram of a free-space optical communication system according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a free-space optical communication system according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a free-space optical communication system according to yet another embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details or with other methods described herein.
The invention provides a new free space optical communication system, which can realize the conversion of multi-path optical-electric communication by a single board in a communication link layer configurable mode, and the switching of channels can be configured arbitrarily by software.
Fig. 1 shows a schematic structural diagram of a free space optical communication system provided in this embodiment.
As shown in fig. 1, the free-space optical communication system 102 provided in this embodiment is connected between optical transceivers (including the first optical transceiver 101a and the second optical transceiver 101b) and a power grid port (including the first power grid port 103a and the second power grid port 103b), and is capable of implementing conversion of different communication wavelengths, thereby implementing multi-path optical-electrical communication conversion.
Specifically, in the present embodiment, the free-space optical communication system 102 preferably includes: a serial-to-parallel conversion module 201a, a data channel selection module 201b and a physical interface transceiver. In this embodiment, the physical interface transceivers included in the communication system preferably include a first physical interface transceiver 103a and a second physical interface transceiver 103b, corresponding to the number of the optical transceivers and the number of the power network ports.
As shown in fig. 1, in the present embodiment, the serial-parallel conversion module 201a is connected to the first optical transceiver 101a and the second optical transceiver 101b through its own serial interface, and is capable of converting serial data transmitted by the first optical transceiver 101a and the second optical transceiver 101b into corresponding parallel data and outputting the parallel data to corresponding devices through its own parallel interface. Meanwhile, according to actual needs, the serial-parallel conversion module 201a can also convert the parallel data received by its own parallel interface into corresponding serial data and transmit the serial data to the first optical transceiver 101a and the second optical transceiver 101b through its own serial interface.
In this embodiment, the serial-parallel conversion module 201a is preferably connected to the optical transceiver through a high-speed serdes interface, and the serial-parallel conversion module 201a can convert the received serial data of the high-speed serdes into RGMII parallel data.
It should be noted that in other embodiments of the present invention, the connection form between the serial-to-parallel conversion module 201a and the optical transceiver or the specific form of the transmitted serial data may also be other reasonable forms according to practical needs, and the present invention is not limited thereto. Meanwhile, the parallel data converted by the serial-parallel conversion module 201a may also be parallel data in other reasonable forms, and the present invention is not limited thereto. For example, in an embodiment of the present invention, the parallel data converted by the serial-parallel conversion module 201a may also be parallel data such as GMII.
The first communication end of the data channel selection module 201b is connected to the serial-to-parallel conversion module 201a, and the second communication end is connected to the physical interface transceiver 202 (including the first physical interface transceiver 202a and the second physical interface transceiver 202 b). The data channel selection module 201b can switch the data channels in the first communication end and the second communication end, so as to select the data channel between the parallel interface of the serial-parallel conversion module 201a and the parallel interface of the physical interface transceiver 202, thereby realizing the interchange of link layers.
In this embodiment, the first physical interface transceiver 202a is connected to the first power network interface 103a through its own first serial interface, and the second physical interface transceiver 202b is connected to the second power network interface 103b through its own first serial interface. The physical interface transceiver can convert the parallel data received by the self parallel interface into corresponding serial data, and can also convert the serial data received by the self serial interface into corresponding parallel data, so that data interaction between the second communication end of the physical channel selection module 201b and the power grid port is realized.
In this embodiment, the serial-parallel conversion module 201a and the data channel selection module 201b are preferably integrated in the same device. For example, the serial-parallel conversion module 201a and the data channel selection module 201b may be preferably implemented by using an FPGA, and the FPGA may implement the interchange of link layers through its internal high-speed servers IP core. Specifically, when data is transmitted from the optical transceiver to the electrical serial port, the FPGA may convert the high-speed serdes serial data transmitted by the optical transceiver into RGMII parallel interface data, and then select data connected to different optical-electrical channels according to different software configurations (configuration parameters may be set or configured in real time).
By this way, the free space optical communication system provided by this embodiment can implement flexible configuration of a link layer, and thus can implement arbitrary configuration of different data channels, so that the communication system does not need to use a special single board to implement conversion of electrical-optical signals as in the existing system, which is helpful for reducing the volume and cost of the whole communication system.
As shown in fig. 1, in the present embodiment, the free-space communication system 102 preferably further includes a controller 201 c. The controller 201c is connected to each physical interface transceiver (including the first physical receiving transceiver 202a and the second physical interface transceiver 202b), and the second serial interface of each physical transceiver is connected to the corresponding optical transceiver. For example, the second serial interface of the first physical interface transceiver 202a is connected to the first optical transceiver 101a, and the second serial interface of the second physical interface transceiver 202b is connected to the second optical transceiver 101 b.
The controller 201c can generate corresponding transceiver configuration data according to actual needs and transmit the transceiver configuration data to a corresponding physical interface transceiver, so as to configure a data channel between a first serial interface and a second serial interface of the physical interface transceiver.
Specifically, in the present embodiment, the transceiver configuration data generated by the controller 201c preferably includes register configuration data. The controller 201c may utilize the register configuration data to adjust the corresponding register configuration within the physical interface transceiver.
For example, both the optical transceiver and the power network interface may be connected to the servers pin of the physical interface transceiver, and the controller 201 may configure the physical interface transceiver register to implement the direct data connection.
Compared with the method that the serial-parallel conversion module and the data channel selection module are used for converting the electric-optical signals, the time delay of data transmission is smaller by using the configuration register to realize the direct connection of the data between the optical transceiver and the power grid port, so that the configuration process is simpler and more convenient. And the serial-parallel conversion module and the data channel selection module are used for converting the electric-optical signals, so that the data connection mode is more flexible.
Of course, in other embodiments of the present invention, the free-space optical communication system may also be implemented in other reasonable structural forms based on the above principle according to practical needs, and the present invention is not limited thereto. For example, in one embodiment of the present invention, a free-space optical communication system may be implemented using the structure shown in fig. 2, and the communication system may be understood as including only the contents of the communication system shown in fig. 1 for performing conversion of an electrical-optical signal using the serial-parallel conversion module and the data channel selection module. In another embodiment of the present invention, the free-space optical communication system may be implemented by using the structure shown in fig. 3, and the communication system may be understood as only including the content of the communication system shown in fig. 1 that realizes the direct data connection between the optical transceiver and the power grid port through the configuration register.
In this embodiment, the serial-to-parallel conversion module 201a, the data channel selection module 201b, and the controller 201c are preferably integrated in the same device (e.g., FPGA chip). Of course, in other embodiments of the present invention, the serial-parallel conversion module 201a, the data channel selection module 201b, and the controller 201c may also be implemented by using more than two devices, which is not limited to the present invention.
It should be noted that, in different embodiments of the present invention, the number of the physical interface transceivers included in the communication system may be configured to be different reasonable values according to actual needs, and the present invention does not limit the specific number of the physical interface transceivers.
As can be seen from the above description, the free space optical communication system provided by the present invention can implement flexible configuration of ports in a software manner, so as to implement data interaction between optical communications with different wavelengths and power grid port communications (e.g., gigabit power grid port), which is more flexible than the existing communication system.
Meanwhile, the communication system can realize multi-channel optical-electrical conversion, so that the use amount of the single board can be effectively reduced, and the installation space and the hardware cost are greatly saved. In addition, the reduction of the number of the single boards is also beneficial to reducing the workload in the system maintenance process, thereby reducing the system maintenance difficulty.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular structures or process steps disclosed herein, but extend to equivalents thereof as would be understood by those skilled in the relevant art. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase "one embodiment" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
While the above examples are illustrative of the principles of the present invention in one or more applications, it will be apparent to those of ordinary skill in the art that various changes in form, usage and details of implementation can be made without departing from the principles and concepts of the invention. Accordingly, the invention is defined by the appended claims.
Claims (10)
1. A free-space optical communication system, the system comprising:
the physical interface transceiver is provided with a first serial interface used for being connected with a power grid port, and a second serial interface used for being connected with the optical transceiver;
and the controller is connected with the physical interface transceiver and is used for generating corresponding transceiver configuration data and transmitting the transceiver configuration data to the physical interface transceiver so as to realize the configuration of a data channel between the first serial interface and the second serial interface of the physical interface transceiver.
2. The system of claim 1, wherein the system comprises a plurality of physical interface transceivers coupled to the controller, each physical interface transceiver for coupling to a corresponding optical transceiver and a power grid port, respectively.
3. The system of claim 1 or 2, wherein the transceiver configuration data comprises register configuration data, the controller being configured to use the register configuration data to adjust a corresponding register configuration within the physical interface transceiver to thereby enable configuration of a data lane between the first serial interface and the second serial interface of the physical interface transceiver.
4. The system of any one of claims 1-3, further comprising:
a serial-parallel conversion module, which is connected to the optical transceiver through its own serial interface, and is configured to convert serial interface data transmitted by the optical transceiver into corresponding parallel interface data and output the parallel interface data through its own parallel interface, or convert parallel interface data received by its own parallel interface into corresponding serial interface data and transmit the serial interface data to the optical transceiver through its own serial interface;
a data channel selection module, a first communication end of which is connected with the parallel interface of the serial-parallel conversion module, and a second communication end of which is connected with the parallel interface of the physical interface transceiver, and is used for realizing the selection of a data transmission channel between the parallel interface of the serial-parallel conversion module and the parallel interface of the physical interface transceiver;
the physical interface transceiver is configured to convert parallel data received through a self parallel interface into corresponding serial data and transmit the serial data to the power grid port through the first serial interface, or convert serial data transmitted by the power grid port into corresponding parallel data and output the parallel data through the self parallel interface.
5. The system of claim 4, wherein the serial-to-parallel conversion module, the data path selection module, and the controller are integrated within a same chip.
6. A free-space optical communication system, the system comprising:
the serial-parallel conversion module is used for being connected with an optical transceiver through a serial interface of the serial conversion module, converting serial interface data transmitted by the optical transceiver into corresponding parallel interface data and outputting the parallel interface data through a parallel interface of the serial conversion module, or converting parallel interface data received by a parallel interface of the serial conversion module into corresponding serial interface data and transmitting the serial interface data to the optical transceiver through a serial interface of the serial conversion module;
the physical interface transceiver is used for connecting a first serial interface with a power grid port;
a data channel selection module, a first communication end of which is connected with the parallel interface of the serial-parallel conversion module, and a second communication end of which is connected with the parallel interface of the physical interface transceiver, and is used for realizing the selection of a data transmission channel between the parallel interface of the serial-parallel conversion module and the parallel interface of the physical interface transceiver;
the physical interface transceiver is configured to convert parallel data received through a self parallel interface into corresponding serial data and transmit the serial data to the power grid port through the first serial interface, or convert serial data transmitted by the power grid port into corresponding parallel data and output the parallel data through the self parallel interface.
7. The system of claim 6, wherein the system further comprises:
a controller connected to the physical interface transceiver for generating and transmitting corresponding transceiver configuration data to the physical interface transceiver;
the physical interface transceiver further includes a second serial interface, the physical interface transceiver configured to adjust a data channel between the first serial interface and the second serial interface according to the transceiver configuration data.
8. The system of claim 7, wherein the transceiver configuration data comprises register configuration data, the controller configured to use the register configuration data to adjust a configuration of a corresponding register within the physical interface transceiver to enable configuration of a data lane between the first serial interface and the second serial interface of the physical interface transceiver.
9. The system of any one of claims 6-8, wherein the serial-to-parallel conversion module, the data channel selection module, and the controller are integrated within a same chip.
10. The system of any one of claims 6-9, wherein the system comprises a plurality of physical interface transceivers, each physical interface transceiver for connecting with a corresponding optical transceiver and a power grid port, respectively.
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