CN106776440B - Switching method and system of multi-channel signal interface and matrix switching backboard - Google Patents
Switching method and system of multi-channel signal interface and matrix switching backboard Download PDFInfo
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- G06F13/4204—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus
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Abstract
The invention provides a switching method of a multipath signal interface, which is applied to a matrix switching back plate, wherein the matrix switching back plate is in communication connection with an interface board card, and the method comprises the following steps: the method comprises the steps that input signals are collected through an interface board card, the input signals are converted into digital signals, the converted digital signals and interface positions occupied by all paths of digital signals are packaged, packaged interface data to be switched are sent to a matrix switching back plate, the matrix switching back plate decompresses the interface data to be switched, at least one input signal group is determined according to a preset configuration switching table, all paths of input signals in each input signal group are switched to the same interface, and the interfaces to which the input signals in different input signal groups are switched are different; for each input signal group: and packaging each path of input signals in the input signal group and sending the input signals to the corresponding interface. The invention solves the problem that the intelligent switching of the interfaces cannot be carried out by adopting a relay mode when the number of the interfaces is larger in the prior art.
Description
Technical Field
the present invention relates to the field of signal transmission technologies, and in particular, to a method and a system for switching multiple signal interfaces, and a matrix switching backplane.
background
In the process of signal transmission, it is usually necessary to switch the connection relationship of multiple signal interfaces, and in the prior art, a relay matrix is mostly adopted for switching. However, when the relay matrix is adopted, if the number of the interfaces is small, the requirement can be met, but when the number of the interfaces is large, the intelligent switching of the interfaces cannot be performed by the method.
For example: when the 1000 × 1000 interface switching is realized by using relays, any switching between interfaces can be realized by using more than 1 ten thousand relays, which causes too long system routing, poor signal integrity, and introduction of too large impedance.
Disclosure of Invention
in view of this, the embodiment of the invention discloses a switching method and system for multiple signal interfaces and a matrix switching backplane, which solve the problem that the intelligent switching of the interfaces cannot be performed by adopting a relay mode when the number of the interfaces is large in the prior art.
the method for switching the multi-channel signal interface provided by the embodiment comprises the following steps:
The method is applied to a matrix switching back plate, the matrix switching back plate is in communication connection with an interface board card, and the method comprises the following steps:
Receiving interface data to be switched sent by an interface board card; the interface data to be switched is generated by converting a received input signal into a digital signal by the interface board card, determining an interface position occupied by each path of digital signal and packaging each path of digital signal and interface position information occupied by each path of digital signal, wherein the received input signal comprises at least one path of input signal;
Decompressing the interface data to be switched to obtain each path of input signals and position information of each interface in the interface data to be switched;
determining at least one input signal group according to a preset configuration switching table, wherein each path of input signals in each input signal group are switched to the same interface, and the interfaces to which the input signals in different input signal groups are switched are different;
For each input signal group: and packaging each path of input signals in the input signal group and sending the input signals to the corresponding interface.
Optionally, the determining at least one input signal group according to a preset configuration switching table includes:
Calling the preset configuration switching table;
Selecting an input signal switched to the same interface in the configuration switching table from each path of signals;
And determining each input signal switched to the same interface as one input signal group, wherein the determined input signal group is at least one.
The embodiment of the invention also provides a matrix switching back plate, which comprises:
The receiving unit is used for receiving the interface data to be switched, which is sent by the interface board card; the interface data to be switched is generated by converting a received input signal into a digital signal by the interface board card, determining an interface position occupied by each path of digital signal and packaging each path of digital signal and interface position information occupied by each path of digital signal, wherein the received input signal comprises at least one path of input signal;
The decompression unit is used for decompressing the interface data to be switched to obtain each path of input signals and the position information of each interface in the interface data to be switched;
The determining unit is used for determining at least one input signal group according to a preset configuration switching table, each path of input signals in each input signal group are switched to the same interface, and the interfaces to which the input signals in different input signal groups are switched are different;
and the sending unit is used for packing each path of input signals in each input signal group and sending the packed input signals to the corresponding interface.
Optionally, the determining unit includes:
The calling subunit is used for calling the preset configuration switching table;
The selection subunit is used for selecting each path of input signals switched to the same interface in the configuration switching table;
And the determining subunit is used for determining each path of input signals switched to the same interface as one input signal group, and the determined input signal group is at least one.
in an embodiment of the present invention, a system for switching multiple signal interfaces is further provided, where the system includes: the matrix switching back plate and the at least one interface board card;
the interface board card is used for receiving a plurality of paths of input signals, converting the input signals into digital signals, determining the interface position occupied by each path of digital signals, packaging each path of digital signals and the interface position information occupied by each path of digital signals, and sending the interface data to be converted after packaging to the matrix switching backboard;
The matrix switching back plate is used for receiving the interface data to be switched, decompressing the interface data to be switched, obtaining the position information of each input signal and each interface in the interface data to be switched, determining at least one input signal group according to a preset configuration switching table, switching each input signal in each input signal group to the same interface, and packaging and sending each input signal in each input signal group to the corresponding interface, wherein the interfaces to which the input signals are switched in different input signal groups are different.
Optionally, the system further includes:
an I/O bus interface; the I/O bus interface is arranged on the interface board card and the matrix switching backboard;
The I/O bus interface is used for data transmission between the interface board card and the matrix switching backboard.
optionally, the matrix switching backplane comprises a programmable gate array FPGA;
The FPGA arranged on the matrix switching backboard is used for determining at least one input signal group according to a preset configuration switching table, each path of input signal in each input signal group is switched to the same interface, the interfaces to which the input signals in different input signal groups are switched are different, and each path of input signal in each input signal group is packed and sent to the corresponding interface.
optionally, the interface board card includes the FPGA;
The FPGA arranged on the interface board card is used for packaging each path of digital signals and interface position information occupied by each path of digital signals, and sending interface data to be switched after packaging to the matrix switching backboard.
Optionally, the interface board card includes: a digital-to-analog converter;
the digital-to-analog converter collects the received digital signals and converts the received digital signals into analog signals; the digital signal is obtained by decompressing the packed digital signal received by the interface board card and sent by the matrix switching backboard.
Optionally, when the digital-to-analog converter converts the digital signal into an analog signal, the sampling frequency adopted is 10 times of the frequency when the received digital signal is acquired.
the embodiment of the invention provides a switching method of a multi-channel signal interface, which is applied to a matrix switching back plate, wherein the matrix switching back plate is in communication connection with an interface plate card, and the method comprises the following steps: receiving interface data to be switched sent by an interface board card; the interface data to be switched is generated by converting a received input signal into a digital signal by the interface board card, wherein the received input signal comprises at least one path of input signal, determining an interface position occupied by each path of digital signal and packaging each path of digital signal and interface position information occupied by each path of digital signal; decompressing the interface data to be switched to obtain each path of input signals and position information of each interface in the interface data to be switched; and determining at least one input signal group according to a preset configuration switching table, wherein each path of input signals in each input signal group are switched to the same interface, and the interfaces to which the input signals in different input signal groups are switched are different. For each input signal group: and packaging each path of input signals in the input signal group and sending the input signals to the corresponding interface. By switching the interface signals in the matrix switching back plate, the problem that the intelligent switching of the interfaces cannot be performed by adopting a relay mode when the number of the interfaces is large in the prior art is solved.
Drawings
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flowchart illustrating a method for switching multiple signal interfaces according to an embodiment of the present invention;
Fig. 2 is a schematic flowchart illustrating a method for switching multiple signal interfaces according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of a switching system of a multi-channel signal interface according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a matrix switching backplane according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
referring to fig. 1, a method for switching a multi-channel signal interface according to an embodiment of the present invention is shown, where the method is applied to a matrix switching backplane, and the matrix switching backplane is communicatively connected to an interface board card, and the method includes:
s101: receiving interface data to be switched sent by an interface board card; the interface data to be switched is generated by converting a received input signal into a digital signal by the interface board card, determining an interface position occupied by each path of digital signal, and packaging each path of digital signal and interface position information occupied by each path of digital signal, wherein the received input signal comprises at least one path of input signal.
In this embodiment, the signal conditioner in the interface board collects each received input signal, where the input signal is an analog signal, and the signal conditioner may amplify and reduce the signal. Then, the analog-to-digital converter in the interface board converts the received analog signal into a digital signal. The specific method for converting the analog signal into the digital signal by the analog-to-digital converter may be: the received analog signal is collected, and the collected signal is sampled according to the nyquist theorem, specifically, in this embodiment, a high-speed sampling frequency may be set, for example, the sampling frequency when the collected signal is sampled according to the nyquist theorem may be 10 times of the sampling frequency when the signal is collected. Therefore, high-speed sampling frequency is adopted, and high-fidelity acquisition of the waveform state of the electric layer is guaranteed. In addition, in the process of performing analog-to-digital conversion on the signals, high-resolution discrete processing is adopted, and the resolution can reach 12 bits. And then, the FPGA arranged in the interface board card packs each path of digital signals and interface position information occupied by each path of digital signals, and sends the packed interface data to be switched to the matrix switching backboard.
In this embodiment, the matrix switching backplane receives interface data to be switched, which is sent by an FPGA in the interface board card.
in this embodiment, it should be noted that the purpose of the interface board card packing each path of digital signal and the interface position information occupied by each path of digital signal is to facilitate signal transmission.
S102: decompressing the interface data to be switched to obtain the input signals of all paths and the position information of all interfaces in the interface data to be switched.
s103: and determining at least one input signal group according to a preset configuration switching table, wherein each path of input signals in each input signal group are switched to the same interface, and the interfaces to which the input signals in different input signal groups are switched are different.
In this embodiment, the configuration switching table stores switching rules of signals, for example, 3 interfaces and 3 paths of signals are respectively represented as interface 1, interface 2 and interface 3, and signal 1, signal 2 and signal 3 are input, when signal 1 is input from interface 1, signal 2 is input from interface 2, and signal 3 is input from interface 3, and after signal switching is performed, signal 1 is output from interface 3, signal 2 is output from interface 1, and signal 3 is output from interface 2. Therefore, the configuration switching table stores the rule of switching the signal to the path, for example, the rule may be in the form of a matrix.
in this embodiment, determining at least one input signal group according to a preset configuration switching table may specifically include:
S201: and calling the preset configuration switching table.
s202: and selecting the input signals switched to the same interface in the configuration switching table from the signals of each path.
S203: and determining each input signal switched to the same interface as one input signal group, wherein the determined input signal group is at least one.
in this embodiment, a switching rule of the interface signals is stored in a preset configuration switching table, an input signal switched to the same interface in the configuration switching table is selected from each path of signals according to the switching rule, and each path of input signal switched to the same interface is determined as an input signal group.
s104: for each input signal group: and packaging each path of input signals in the input signal group and sending the input signals to the corresponding interface.
In this embodiment, the FPGA in the matrix switching backplane respectively packages and sends each input signal in each input signal group to the corresponding interface.
In this embodiment, after the interface board card receives the digital signal sent by the matrix switching backplane, the interface board card further includes a digital-to-analog converter in the interface board card to convert the digital signal into an analog signal. When digital signals are converted into analog signals, high-speed analog-to-digital conversion frequency needs to be set, the conversion frequency is generally set to be 10 times of the sampling frequency according to the nyquist sampling theorem, high sampling of relayed electrical signals is achieved, and high-fidelity restoration of waveform forms of electrical layers of interface signals is guaranteed.
In this embodiment, it should be noted that the interface board further includes: a communication transmission interface; the communication transmission interface is used for receiving an external interface signal to be switched and outputting the switched interface signal to the outside. The interface board card can be used for carrying out configuration management on whether the signal received by the interface board card is the interface signal to be switched or the switched interface signal, and identifying whether the received signal is the interface signal to be switched or the switched interface signal according to preconfigured information. And after the analog signal is restored by the digital-to-analog converter in the interface board card, the restored analog signal is sent to the output interface.
In this embodiment, it should be noted that the interface signal to be switched is the same as the input signal mentioned in this embodiment.
in this embodiment, the interface data to be switched is received through the matrix switching backplane, and after the interface data to be switched is decompressed, at least one input signal group is determined according to a preset configuration switching table, each input signal in each input signal group is switched to the same interface, and the interfaces to which the input signals in different input signal groups are switched are different, and each input signal in each input signal group is packed and sent to the corresponding interface. The problem of among the prior art, when interface quantity is great, adopt the mode of relay to carry out the intelligent switching of interface is solved.
Example two
referring to fig. 3, a multi-channel signal interface switching system according to an embodiment of the present invention is shown. In this embodiment, the system includes:
a matrix switching backplane 301 and at least one interface board card 302;
the interface board card is used for receiving a plurality of paths of input signals, converting the plurality of paths of input signals into digital signals, determining the interface position occupied by each path of digital signal, packaging each path of digital signal and the interface position information occupied by each path of digital signal, and sending the interface data to be switched after packaging to the matrix switching backboard;
the matrix switching back plate is used for receiving the interface data to be switched, decompressing the interface data to be switched, obtaining the position information of each input signal and each interface in the interface data to be switched, determining at least one input signal group according to a preset configuration switching table, switching each input signal in each input signal group to the same interface, and packaging and sending each input signal in each input signal group to the corresponding interface, wherein the interfaces to which the input signals are switched in different input signal groups are different.
In this embodiment, the interface board card includes a signal conditioner for collecting the received input signals, and the signal conditioner may amplify and reduce the signals.
In this embodiment, the interface board includes an analog-to-digital converter, which is configured to convert a received analog signal into a digital signal.
In this embodiment, the interface board includes an FPGA (Field-Programmable Gate Array) 303, configured to pack each path of digital signal and interface position information occupied by each path of digital signal, and send the packed interface data to be switched to the matrix switching backplane.
in this embodiment, the interface board includes a communication transmission interface, and the communication transmission interface is configured to receive an external interface signal to be switched and output the switched interface signal to the outside. The interface board card can be used for carrying out configuration management on whether the signal received by the interface board card is the interface signal to be switched or the switched interface signal, and identifying whether the received signal is the interface signal to be switched or the switched interface signal according to preconfigured information.
In this embodiment, it should be noted that the interface signal to be switched is the same as the input signal mentioned in this embodiment.
In this embodiment, the interface board includes a digital-to-analog converter, collects the received digital signal, and converts the received digital signal into an analog signal; the digital signal is obtained by decompressing the packed digital signal received by the interface board card and sent by the matrix switching backboard. And after the analog signal is restored by the digital-to-analog converter in the interface board card, the restored analog signal is sent to the output interface.
in this embodiment, it should be noted that each interface board card may receive 128 input signals.
In this embodiment, the matrix switching backplane includes an FPGA303 configured to determine at least one input signal group according to a preset configuration switching table, where each input signal in each input signal group is switched to the same interface, and interfaces to which the input signals in different input signal groups are switched are different, and each input signal in each input signal group is packed and sent to the corresponding interface.
In this embodiment, data transmission between the interface board card and the matrix switching backplane is performed through the I/O bus interface 304, and it is preferable in this embodiment that: the third generation I/O bus interface PCI-E interface (English full name: PCI Express); the PCI-E interface is arranged on the interface board card and the matrix switching backboard. The matrix switching back plate can simultaneously support a plurality of PCI-E interfaces, and a plurality of interface board cards are inserted into the matrix switching back plate according to needs. For example: if 1024-path matrix switching is required, only 10 board cards are required to be inserted into the interface backplane to complete the switching of any interface.
In this embodiment, the present invention provides a switching system for multiple signal interfaces, where the system includes an interface board card and a matrix switching backplane. The interface board card collects input signals, converts the input signals into digital signals, packs the converted digital signals and interface positions occupied by all paths of digital signals, sends the packed interface data to be switched to the matrix switching backboard, decompresses the interface data to be switched by the matrix switching backboard, obtains all paths of input signals and position information of all interfaces in the interface data to be switched, and determines at least one input signal group according to a preset configuration switching table, all paths of input signals in each input signal group are switched to the same interface, and the interfaces switched to by the input signals in different input signal groups are different; for each input signal group: and packaging each path of input signals in the input signal group and sending the input signals to the corresponding interface. The problem of among the prior art, when interface quantity is great, adopt the mode of relay to carry out the intelligent switching of interface is solved.
Referring to fig. 3, a matrix switching backplane according to an embodiment of the present invention is shown. In this embodiment the back plate comprises:
A receiving unit 401, configured to receive interface data to be switched, sent by an interface board card; the interface board card converts at least one path of received input signals into digital signals, determines the interface position occupied by each path of digital signals, and packs the digital signals and the interface position information occupied by the digital signals to generate the interface data to be switched.
A decompressing unit 402, configured to decompress the interface data to be switched, and obtain the position information of each input signal and each interface in the interface data to be switched.
The determining unit 403 is configured to determine at least one input signal group according to a preset configuration switching table, where each input signal in each input signal group is switched to the same interface, and interfaces to which the input signals in different input signal groups are switched are different.
and a sending unit 404, configured to, for each input signal group, pack and send each input signal in the input signal group to a corresponding interface.
Optionally, the determining unit includes:
And the calling subunit is used for calling the preset configuration switching table.
And the selection subunit is used for selecting each path of input signals switched to the same interface in the configuration switching table.
And the determining subunit is used for determining each path of input signals switched to the same interface as an input signal group.
In this embodiment, the interface data to be switched is received through the matrix switching backplane, and after the interface data to be switched is decompressed, at least one input signal group is determined according to a preset configuration switching table, each input signal in each input signal group is switched to the same interface, and the interfaces to which the input signals in different input signal groups are switched are different, and each input signal in each input signal group is packed and sent to the corresponding interface. The invention solves the problem that the intelligent switching of the interfaces cannot be carried out by adopting a relay mode when the number of the interfaces is large in the prior art.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A switching method of a multipath signal interface is characterized in that the method is applied to a matrix switching back plate, the matrix switching back plate is in communication connection with an interface board card, and the method comprises the following steps:
Receiving interface data to be switched sent by an interface board card; the interface data to be switched is generated by converting a received input signal into a digital signal by the interface board card, determining an interface position occupied by each path of digital signal and packaging each path of digital signal and interface position information occupied by each path of digital signal, wherein the received input signal comprises at least one path of input signal;
decompressing the interface data to be switched to obtain each path of input signals and position information of each interface in the interface data to be switched;
Determining at least one input signal group according to a preset configuration switching table, wherein each path of input signals in each input signal group are switched to the same interface, and the interfaces to which the input signals in different input signal groups are switched are different;
For each input signal group: and packaging each path of input signals in the input signal group and sending the input signals to the corresponding interface.
2. The method of claim 1, wherein determining at least one input signal group according to a predetermined configuration switching table comprises:
calling the preset configuration switching table;
Selecting an input signal switched to the same interface in the configuration switching table from each path of signals;
And determining each input signal switched to the same interface as one input signal group, wherein the determined input signal group is at least one.
3. a matrix switching backplane, the backplane comprising:
The receiving unit is used for receiving the interface data to be switched, which is sent by the interface board card; the interface data to be switched is generated by converting a received input signal into a digital signal by the interface board card, determining an interface position occupied by each path of digital signal and packaging each path of digital signal and interface position information occupied by each path of digital signal, wherein the received input signal comprises at least one path of input signal;
the decompression unit is used for decompressing the interface data to be switched to obtain each path of input signals and the position information of each interface in the interface data to be switched;
the determining unit is used for determining at least one input signal group according to a preset configuration switching table, each path of input signals in each input signal group are switched to the same interface, and the interfaces to which the input signals in different input signal groups are switched are different;
and the sending unit is used for packing each path of input signals in each input signal group and sending the packed input signals to the corresponding interface.
4. The matrix switching backplane according to claim 3, wherein the determining unit comprises:
The calling subunit is used for calling the preset configuration switching table;
The selection subunit is used for selecting each path of input signals switched to the same interface in the configuration switching table;
And the determining subunit is used for determining each path of input signals switched to the same interface as one input signal group, and the determined input signal group is at least one.
5. A system for switching a plurality of signal interfaces, the system comprising: the matrix switching back plate and the at least one interface board card;
The interface board card is used for receiving a plurality of paths of input signals, converting the input signals into digital signals, determining the interface position occupied by each path of digital signals, packaging each path of digital signals and the interface position information occupied by each path of digital signals, and sending the interface data to be converted after packaging to the matrix switching backboard;
The matrix switching back plate is used for receiving the interface data to be switched, decompressing the interface data to be switched, obtaining the position information of each input signal and each interface in the interface data to be switched, determining at least one input signal group according to a preset configuration switching table, switching each input signal in each input signal group to the same interface, and packaging and sending each input signal in each input signal group to the corresponding interface, wherein the interfaces to which the input signals are switched in different input signal groups are different.
6. the system of claim 5, further comprising:
an I/O bus interface; the I/O bus interface is arranged on the interface board card and the matrix switching backboard;
the I/O bus interface is used for data transmission between the interface board card and the matrix switching backboard.
7. the system of claim 5, wherein the matrix switching backplane comprises a programmable gate array (FPGA);
the FPGA arranged on the matrix switching backboard is used for determining at least one input signal group according to a preset configuration switching table, each path of input signal in each input signal group is switched to the same interface, the interfaces to which the input signals in different input signal groups are switched are different, and each path of input signal in each input signal group is packed and sent to the corresponding interface.
8. the system of claim 5, wherein the interface board comprises an FPGA;
the FPGA arranged on the interface board card is used for packaging each path of digital signals and interface position information occupied by each path of digital signals, and sending interface data to be switched after packaging to the matrix switching backboard.
9. the system of claim 5, wherein the interface board comprises: a digital-to-analog converter;
The digital-to-analog converter collects the received digital signals and converts the received digital signals into analog signals; the digital signal is obtained by decompressing the packed digital signal received by the interface board card and sent by the matrix switching backboard.
10. the system of claim 9, wherein the digital-to-analog converter converts the digital signal to an analog signal using a sampling frequency that is 10 times the frequency at which the received digital signal is acquired.
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| CN103124196A (en) * | 2011-11-18 | 2013-05-29 | 北京旋极信息技术股份有限公司 | Transmission system of resistive analog signal in private network |
| CN202634558U (en) * | 2012-06-28 | 2012-12-26 | 深圳市唯奥视讯技术有限公司 | Image processing device |
| CN104049554A (en) * | 2013-03-11 | 2014-09-17 | 中国科学院软件研究所 | FPGA-based multifunctional input-output module and input-output method |
| CN104125375A (en) * | 2013-04-27 | 2014-10-29 | 深圳市载德光电技术开发有限公司 | Multimedia transmission matrix framework |
| CN104639358A (en) * | 2013-11-13 | 2015-05-20 | 中国石油化工股份有限公司 | Batched network port switching method and system |
| CN205091732U (en) * | 2015-11-11 | 2016-03-16 | 乐卡汽车智能科技（北京）有限公司 | Automatic switching device for USB interface |
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