CN114519970A - Network topology identification method and LED display screen control system - Google Patents

Network topology identification method and LED display screen control system Download PDF

Info

Publication number
CN114519970A
CN114519970A CN202011294975.1A CN202011294975A CN114519970A CN 114519970 A CN114519970 A CN 114519970A CN 202011294975 A CN202011294975 A CN 202011294975A CN 114519970 A CN114519970 A CN 114519970A
Authority
CN
China
Prior art keywords
switches
receiving
card
broadcast packet
node information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202011294975.1A
Other languages
Chinese (zh)
Other versions
CN114519970B (en
Inventor
张强强
韦桂锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Novastar Electronic Technology Co Ltd
Original Assignee
Xian Novastar Electronic Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Novastar Electronic Technology Co Ltd filed Critical Xian Novastar Electronic Technology Co Ltd
Priority to CN202011294975.1A priority Critical patent/CN114519970B/en
Publication of CN114519970A publication Critical patent/CN114519970A/en
Application granted granted Critical
Publication of CN114519970B publication Critical patent/CN114519970B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/147—Digital output to display device ; Cooperation and interconnection of the display device with other functional units using display panels

Abstract

The embodiment of the invention discloses a network topology identification method and an LED display screen control system suitable for the network topology identification method. The LED display screen control system comprises a sending card, a plurality of switches and a plurality of receiving cards, and the plurality of receiving cards are connected with the sending card through the switches. The network topology identification method gradually increases network topology details from point to line and line to plane, so that the system can identify the network topology for many times in stages, the control flow of the system is simplified, and the system is more intelligent and flexible.

Description

Network topology identification method and LED display screen control system
Technical Field
The invention relates to the technical field of network communication and display control, in particular to a network topology identification method and an LED display screen control system.
Background
With the rapid development of the computing power and storage power of computers, the screen display technology with fixed size and the video content from a single source can no longer meet the increasing demand for displaying mass information. Information visualization is used as an important component in information-based construction, multiple paths of video input are respectively zoomed and then are superposed and displayed on an LED display wall formed by an N screen multiplied by M screen, and the requirements in the fields of Internet of things, intelligent traffic networks, intelligent power grids, digital city construction and the like are increasing.
In the LED display screen control system shown in fig. 1, a sending card is electrically connected to a control network port of a switch, and is electrically connected to a plurality of receiving card strings through a plurality of network ports 1 to 4 of the switch, respectively, wherein each receiving card string includes a plurality of cascaded receiving cards. In the working process of the LED screen display control system, all receiving cards send broadcast packets and are forwarded to a sending card by a switch, the sending card can only identify the number of the receiving cards connected with the switch, and the receiving cards specifically connected with a certain network port of the switch cannot be obtained, so that the sending card cannot identify the network topology relationship among the receiving cards, and the network topology does not support rings.
Disclosure of Invention
Therefore, to overcome at least some of the defects and shortcomings in the prior art, embodiments of the present invention provide a network topology identification method and an LED display screen control system.
Specifically, the network topology identification method provided by the embodiment of the present invention is applied to an LED display screen control system including a sending card, a plurality of switches, and a plurality of receiving cards, where the plurality of receiving cards are connected to the sending card through the plurality of switches. The network topology identification method comprises the following steps: outputting a first broadcast packet containing a first mark value by a sending card, receiving a first response packet formed by the first broadcast packet after passing through the plurality of switches and the plurality of receiving cards, and performing mark value filtering on the first response packet to determine a backup relationship between interfaces of the sending card connected with the plurality of switches; outputting a second broadcast packet containing a second mark value by a sending card, receiving a second response packet formed by the second broadcast packet passing through the plurality of switches and the plurality of receiving cards and increasing switch node information one by one, and analyzing the node information of the second response packet to determine the backup relationship among the plurality of switches; and outputting a third broadcast packet containing a third mark value by a sending card, receiving a third response packet formed by the third broadcast packet passing through the plurality of switches and the plurality of receiving cards and increasing switch node information and receiving card node information one by one, and analyzing the node information of the third response packet to determine the network port connection relation among the switches which are backup switches and the receiving card topology relation connected among the network ports.
According to the network topology identification method, the network topology details are gradually increased from point to line and line to surface, so that the system can identify the network topology for many times in stages, the control flow of the system is simplified, and the system is more intelligent and flexible.
In one embodiment of the present invention, during the first broadcast packet passes through the plurality of switches and the plurality of receiving cards, the switches and the receiving cards perform node information replacement on the first broadcast packet, but maintain the flag value included in the first broadcast packet as the first flag value so that the first response packet includes the first flag value.
In addition, an LED display screen control system provided in an embodiment of the present invention includes: the system comprises a sending card, a plurality of switches and a plurality of receiving cards, wherein the receiving cards are connected with the sending card through the switches. Wherein the transmitter card is to: outputting a first broadcast packet containing a first tag value, receiving a first response packet formed by the first broadcast packet after passing through the plurality of switches and the plurality of receiving cards, and performing tag value filtering on the first response packet to determine a backup relationship between interfaces of the sending card connected with the plurality of switches; outputting a second broadcast packet containing a second tag value, receiving a second response packet formed by the second broadcast packet passing through the plurality of switches and the plurality of receiving cards and increasing switch node information one by one, and performing node information analysis on the second response packet to determine backup relationships among the plurality of switches; and outputting a third broadcast packet containing a third tag value, receiving a third response packet formed by the third broadcast packet passing through the plurality of switches and the plurality of receiving cards and increasing the switch node information and the receiving card node information one by one, and analyzing the node information of the third response packet to determine the network port connection relationship among the switches which are backup switches for each other and the receiving card topology relationship connected among the network ports.
In one embodiment of the present invention, during the first broadcast packet passes through the plurality of switches and the plurality of receiving cards, the switches and the receiving cards perform node information replacement on the first broadcast packet, but maintain the flag value included in the first broadcast packet as the first flag value so that the first response packet includes the first flag value.
In an embodiment of the present invention, a plurality of receiving card strings are connected between the network ports of the mutually-backed switches, and each receiving card string includes one receiving card or a plurality of cascaded receiving cards.
In an embodiment of the present invention, each of the switches is an electrical splitter, the electrical splitter includes a control interface, a controller, a first transceiver electrically connected between the control interface and the controller, a plurality of network ports, and a plurality of ethernet PHY chips electrically connected between the plurality of network ports and the controller, respectively, and the control interface is configured to electrically connect the transmitting card.
In one embodiment of the invention, the controller comprises an FPGA device or an ASIC chip.
In one embodiment of the present invention, the splitter further includes: the cascade interface is used for electrically connecting the other deconcentrator.
In one embodiment of the present invention, the transmitting card comprises a video input interface circuit, a programmable logic device electrically connected to the video input interface circuit, a plurality of optical ports, and a plurality of optical modules electrically connected between the plurality of optical ports and the programmable logic device, respectively; the control interface of the deconcentrator is an optical port, and the first transceiver is an optical module.
In one embodiment of the present invention, the transmitting card includes a video input interface circuit, a programmable logic device electrically connected to the video input interface circuit, a plurality of second ports, and a plurality of second ethernet PHY chips electrically connected between the plurality of second ports and the programmable logic device, respectively; the control interface of the deconcentrator is an internet access, and the first transceiver is an ethernet PHY chip.
The above technical solution may have one or more of the following advantages: the network topology identification of the embodiment of the invention is from point to line and line to surface, and the details of the network topology are gradually increased, so that the system can identify the network topology for many times in stages, the control flow of the system is simplified, and the system is more intelligent and flexible. Moreover, the network link supports ring topology, and network port data backup can be achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a control system of an LED display screen in the prior art.
Fig. 2 is a schematic structural diagram of an LED display screen control system according to an embodiment of the present invention.
Fig. 3A is a schematic diagram of a structure of the switch shown in fig. 2 as a splitter.
Fig. 3B is a schematic diagram of a structure of the transmitter card shown in fig. 2.
Fig. 3C is another schematic diagram of the transmitting card of fig. 2.
Fig. 4 is a schematic structural diagram of another LED display screen control system 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 obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The network topology identification method provided by the embodiment of the invention is suitable for being applied to the LED display screen control system 20 shown in FIG. 2. As shown in fig. 2, the LED display screen control system 20 includes: the transmitting card S1, a plurality of switches such as SW1.1, SW2.1, SW1.2, and SW2.2, and a plurality of receiving cards such as Rx0 to Rx1, Ry0 to Ry2, Rz0 to Rz2, and Rp0 to Rp 2.
As can be seen from fig. 2, the whole LED display screen control system 20 mainly comprises three parts, which are: a receiving card section, a switch section, and a transmitting card section. Setting two interfaces of a sending card S1 as S1P0 and S1P2 respectively, setting a control interface of a switch SW1.1 as SW1.1M, a cascade interface as SW1.1S, and a plurality of net ports as SW1.1P0-SW1.1Pn respectively, setting a control interface of a switch SW2.1 as SW2.1M, a cascade interface as SW2.1S, a plurality of net ports as SW2.1P0-SW2.1Pn respectively, setting a control interface of a switch SW1.2 as SW1.2M, a plurality of net ports as SW1.2P0-SW1.2Pm respectively, setting a control interface of a switch SW2.2 as SW2.2M, and a plurality of net ports as SW2.2P0-SW2.2Pm respectively; the interfaces of the splitter and the interfaces of the sending card cannot forward data to each other in the process of identifying the network topology, so as to ensure that the broadcast packet for identifying the network topology is transmitted unilaterally, for example, when the data interface S1P0 of the sending card S1 is used as the sending port of the broadcast packet, the data interface is no longer used as the receiving port of the broadcast packet, when the control interface SW2.1M of the switch SW2.1 is used as the receiving port of the broadcast packet, the cascade interface SW2.1S and the network ports SW2.1P0 to sw2.1pn are used as the sending port of the broadcast packet, or when the cascade interface SW2.1S and the network ports SW2.1P0 to sw2.1pn of the switch SW2.1 are used as the receiving port of the broadcast packet, the control interface SW2.1M is used as the sending port of the broadcast packet.
In light of the above, the network topology identification method of this embodiment includes the following three steps:
(i) determining backup relationships between interfaces of a sending card connecting switches
Specifically, a first broadcast packet containing a first mark value is output by a sending card, a first response packet formed by the first broadcast packet after passing through the plurality of switches and the plurality of receiving cards is received, and mark value filtering is carried out on the first response packet to determine the backup relationship between the interfaces of the sending card connected with the plurality of switches.
For example, the transmitting card S1 transmits a broadcast packet (corresponding to the first broadcast packet) including Flag equal to 0 (corresponding to the first Flag value) through the interface S1P0, and the switch SW2.1 performs node information replacement after receiving the broadcast packet through the control interface SW2.1M, for example, replaces the transmitting card node information in the broadcast packet with the switch identifier SW2.1, and forwards the node information through the network ports SW2.1P0 to sw2.1pn and the cascade interface SW2.1S.
The broadcast packets forwarded from the ports SW2.1P0 to sw2.1pn are input to the switch SW1.1 via the receiving cards Rx0 to Rx1, the receiving cards Ry0 to Ry2, and the ports SW1.1P0 to sw1.1pn.
The broadcast packet forwarded by the cascade interface SW2.1S is input to the switch SW2.2 through the control interface SW2.2M, then is input to the switch SW1.2 through the net ports SW2.2P0 to sw2.2pm, the receiving cards Rz0 to Rz2, the receiving cards Rp0 to Rp2 and the net ports SW1.2P0 to sw1.2pm after node information replacement is performed by the switch SW2.2, and then is input to the switch SW1.1 through the control interface SW1.2M and the cascade interface SW1.1S after node information replacement is performed by the switch SW 1.2.
Then, the switch SW1.1 performs node information replacement on each broadcast packet input from the network ports SW1.1P0 to sw1.1pn and the cascade interface SW1.1S to form a corresponding response packet (corresponding to the first response packet), and transmits the response packet to the interface S1P2 of the transmitting card S1 through the control interface SW1.1M.
Finally, the transmitting card S1 performs Flag filtering on each response packet received by the interface S1P2, and when detecting that the Flag included in the response packet is 0, determines that the interface S1P2 and the interface S1P0 are in the backup relationship. It should be noted here that the node information replacement operation is performed to facilitate the stable identification of the subsequent nodes, thereby improving the identification speed and accuracy.
(ii) Determining backup relationships between switches
Outputting a second broadcast packet containing a second mark value by a sending card, receiving a second response packet formed by the second broadcast packet passing through the plurality of switches and the plurality of receiving cards and increasing the switch node information one by one, and analyzing the node information of the second response packet to determine the backup relationship among the plurality of switches.
For example, the transmitting card S1 transmits a broadcast packet (corresponding to the second broadcast packet) including Flag 1 (corresponding to the second Flag value) through the interface S1P0, and the switch SW2.1 adds the switch node information, for example, the switch identifier SW2.1 is added to the broadcast packet and retains the node information existing in the broadcast packet after receiving the broadcast packet through the control interface SW2.1M, and forwards the node information through the network ports SW2.1P0 to sw2.1pn and the cascade interface SW2.1S.
The broadcast packets forwarded from the ports SW2.1P0 to sw2.1pn are input to the switch SW1.1 via the receiving cards Rx0 to Rx1, the receiving cards Ry0 to Ry2, and the ports SW1.1P0 to sw1.1pn.
The broadcast packet forwarded by the cascade interface SW2.1S is input to the switch SW2.2 through the control interface SW2.2M, the switch SW2.2 adds its node information (switch node information) to the broadcast packet, and then the broadcast packet is input to the switch SW1.2 through the ports SW2.2P0 to sw2.2pm, the receiving cards Rz0 to Rz2, the receiving cards Rp0 to Rp2 and the ports SW1.2P0 to sw1.2pm, and then the switch SW1.2 adds its node information to the broadcast packet, and then the broadcast packet is input to the switch SW1.1 through the control interface SW1.2M and the cascade interface SW1.1S.
Then, the switch SW1.1 adds its node information to each broadcast packet input from the network ports SW1.1P0 to sw1.1pn and the cascade interface SW1.1S to form a corresponding response packet (corresponding to the second response packet) and transmits the response packet to the interface S1P2 of the transmitting card S1 through the control interface SW1.1M.
Finally, the transmitting card S1 performs node information analysis on each response packet received by the data interface S1P2, for example, the link relationship can be identified corresponding to the network topology shown in fig. 2:
S1P0->SW2.1->SW1.1，
S1P0->SW2.1->SW2.2->SW1.2->SW1.1；
it can be known that switch SW2.1 is in backup relationship with switch SW1.1, and switch SW2.2 is in backup relationship with switch SW 1.2.
(iii) Determining the network port connection relation among the switches which are backup to each other and the receiving card connected among the network ports
Specifically, a sending card outputs a third broadcast packet containing a third tag value, receives a third response packet formed by the third broadcast packet passing through the plurality of switches and the plurality of receiving cards and adding switch node information and receiving card node information one by one, and performs node information analysis on the third response packet to determine a network port connection relationship between switches which are backup switches to each other in the plurality of switches and a receiving card topology relationship connected between the network ports.
For example, the transmitting card S1 transmits a broadcast packet (corresponding to the third broadcast packet) including Flag 2 (corresponding to the third Flag value) through the interface S1P0, the switch SW2.1 receives the broadcast packet through the control interface SW2.1M, adds the switch node information, and forwards the broadcast packet through the network ports SW2.1P0 to sw2.1pn and the cascade interface SW2.1S; for the broadcast packet forwarded by the network port sw2.1pn, the added switch node information includes, for example, a switch identifier such as SW2.1 and a network port identifier such as Pn; for the broadcast packet forwarded by the cascade interface SW2.1S, the added switch node information only includes, for example, a switch identifier such as SW2.1 (although it may further include a cascade interface identifier such as S).
The broadcast packet forwarded by the net ports SW2.1P0-SW2.1Pn is input to the switch SW1.1 through the receiving cards Rx0-Rx1, the receiving cards Ry0-Ry 2 and the net ports SW1.1P0-SW1.1Pn after the receiving card node information is increased one by one; for the broadcast packet forwarded by the internet access SW2.1P0, it sequentially passes through the receiving card Rx0 and the receiving card Rx1, so that the receiving card identifier Rx0 and the receiving card identifier Rx0 are sequentially added as receiving card node information; for the broadcast packet forwarded by the internet access sw2.1pn, the broadcast packet sequentially passes through the receiving card Ry0, the receiving card Ry1 and the receiving card Ry2, so that the receiving card identifier Ry0, the receiving card identifier Ry1 and the receiving card identifier Ry2 are sequentially added as receiving card node information.
The broadcast packet forwarded by the cascade interface SW2.1S is input to the switch SW2.2 through the control interface SW2.2M, the switch SW2.2 adds switch node information to the broadcast packet, and then the broadcast packet is input to the switch SW1.2 through the network ports SW2.2P0 to sw2.2pm, the receiving cards Rz0 to Rz2, the receiving cards Rp0 to Rp2 and the network ports SW1.2P0 to sw1.2pm, and then the broadcast packet is added with the switch node information by the switch SW1.2, and then the broadcast packet is input to the switch SW1.1 through the control interface SW1.2M and the cascade interface SW1.1S. For the broadcast packet forwarded by the internet access SW2.2P0, after adding switch node information including a switch identifier SW2.2 and an internet access identifier P0, receiving card node information including a receiving card identifier Rz0, a receiving card identifier Rz1, a receiving card identifier Rz2 and the like and switch node information including a switch identifier SW1.2 and an internet access identifier P0 are sequentially added, and for the broadcast packet forwarded by the internet access sw2.2pm, after adding switch node information including a switch identifier SW2.2 and an internet access identifier Pm, receiving card node information including a receiving card identifier Rp0, a receiving card identifier Rp1, a receiving card identifier Rp2 and the like and switch node information including a switch identifier SW1.2 and an internet access identifier Pm are sequentially added.
Then, the switch SW1.1 adds switch node information including the switch identifier SW1.1 and the corresponding port identifier P0/Pn to the broadcast packets input from the ports SW1.1P0 to sw1.1pn, respectively, to form a corresponding response packet (corresponding to the third response packet) which is transmitted to the interface S1P2 of the transmitting card S1 through the control interface SW1.1M, and adds switch node information including the switch identifier SW1.1 to the broadcast packet input from the cascade interface SW1.1S, to form a corresponding response packet (corresponding to the third response packet) which is transmitted to the interface S1P2 of the transmitting card S1 through the control interface SW1.1M.
Finally, the transmitting card S1 performs node information analysis on each response packet received by the interface S1P2, for example, the link relationship can be identified corresponding to the network topology shown in fig. 2:
S1P0->SW2.1P0->Rx0->Rx1->SW1.1P0，
S1P0->SW2.1Pn->Ry0->Ry1->Ry2->SW1.1Pn，
S1P0->SW2.1->SW2.2P0->Rz0->Rz1->Rz2->SW1.2P0->SW1.1，
S1P0->SW2.1->SW2.2Pm->Rp0->Rp1->Rp2->SW1.2Pp->SW1.1；
therefore, the connection relation of each network port of each switch and the receiving card topological relation connected with each network port can be known.
From the above, the network topology identification method of the embodiment of the invention gradually increases the details of the network topology from point to line and from line to plane, so that the system can identify the network topology for many times in stages, the control flow of the system is simplified, and the system is more intelligent and flexible. Moreover, the network link supports ring topology, and network port data backup can be achieved.
As an embodiment of the present invention, each of the switches SW1.1, SW2.1, SW1.2 and SW2.2 is a splitter. Fig. 3A shows a schematic diagram of a configuration of the switch SW1.1 as a splitter. In fig. 3A, switch SW1.1 includes a control interface 31, a transceiver 32, a controller 33, a plurality of ethernet PHY chips 34, a plurality of network ports 35, a transceiver 36, and a cascade interface 37. The transceiver 32 is electrically connected between the control interface 31 and the controller 33, the ethernet PHY chips 34 are respectively electrically connected between the network ports 35 and the controller 33, the transceiver 36 is electrically connected between the cascade interface 37 and the controller 33, the control interface 31 is used for electrically connecting the transmitting card S1, the cascade interface 37 is used for electrically connecting another switch such as a splitter, and the controller 33 includes, for example, an FPGA (Field Programmable Gate Array) device or an ASIC (Application Specific Integrated circuit) chip. In one embodiment, the control interface 31 is an optical port, and correspondingly the transceiver 32 is an optical module, such as an SFP optical module, such as a 10G, 25G, 40G or 100G optical module; in another embodiment, the control interface 31 is a network port, and correspondingly the transceiver 32 is an ethernet PHY chip such as a 5G or 10G ethernet PHY chip. Similarly, the cascade interface 37 is an optical port or a network port, and accordingly, the transceiver 36 is an optical module or an ethernet PHY chip. Further, each ethernet PHY chip 34 is, for example, a 1G, 2G, or 5G ethernet PHY chip. It is noted that the switches SW2.1, SW1.2 and SW2.2 may have the structure shown in fig. 3A, or the switches SW1.2 and SW2.2 may omit the transceiver 36 and the cascade interface 37 in the structure shown in fig. 3A.
Referring to fig. 3B, as an embodiment of the present invention, the sending card S1 includes: a video input interface circuit 41, a programmable logic device 43, a plurality of ethernet PHY chips 45, and a plurality of network ports 47. The programmable logic device 43 is electrically connected to the video input interface circuit 41 and is, for example, an FPGA device. The video input interface circuit 41 includes, for example, a digital video interface such as HDMI, DVI, and/or DP, a video decoder electrically connected between the digital video interface and the programmable logic device 43, or an SDI video interface electrically connected to the programmable logic device 43. The ethernet PHY chips 45 are electrically connected between the ports 47 and the programmable logic device 43, and may be 5G ethernet PHY chips or 10G ethernet PHY chips, respectively.
Referring to fig. 3C, as another embodiment of the present invention, the transmitting card S1 includes, for example: a video input interface circuit 41, a programmable logic device 43, a plurality of optical modules 46, and a plurality of optical ports 48. The programmable logic device 43 is electrically connected to the video input interface circuit 41 and is, for example, an FPGA device. The video input interface circuit 41 includes, for example, a digital video interface such as HDMI, DVI, and/or DP, a video decoder electrically connected between the digital video interface and the programmable logic device 43, or an SDI video interface electrically connected to the programmable logic device 43. The plurality of optical modules 46 are electrically connected between the plurality of optical ports 48 and the programmable logic device 43, and may be 10G, 25G, 40G, or 100G optical modules, respectively.
In addition, as can be further understood from fig. 2, a plurality of receiving card strings are connected between the gateways between the switches SW1.1, SW2.1, SW1.2 and SW2.2 that are backup switches to each other, and each receiving card string includes one receiving card or a plurality of cascaded receiving cards. For example, a receiving card string is respectively connected between the network ports SW1.1P0 and SW2.1P0 and between the network ports sw1.1pn and sw2.1pn between the switches SW1.1 and SW2.1, and two receiving card strings are provided, namely receiving card strings Rx0-Rx1 and receiving card strings Ry0-Ry1-Ry 2; similarly, a receiving card string is respectively connected between the net ports SW1.2P0 and SW2.2P0 and between the net ports sw1.2pm and sw2.2pm between the switches SW1.2 and SW2.2, and two receiving card strings are calculated in total, namely the receiving card strings Rz0-Rz1-Rz2 and the receiving card strings Rp0-Rp1-Rp 2. Of course, it is understood that, in practical applications, only one receiving card string or more receiving card strings may be connected between the switches that are backup to each other. Furthermore, for a single receiving card string, it may be one receiving card, or it may be a plurality of receiving cards in cascade.
It should be noted that the switches of the LED display screen control system 20 according to the embodiment of the present invention are not limited to four switches as shown in fig. 2, and may be other numbers, such as two switches as shown in fig. 4. The switch is not limited to a splitter, and may be an optical-to-electrical converter having an optical port and a network port.
In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present invention, and technical solutions of the embodiments can be arbitrarily combined and used without conflict between technical features and structures, and without departing from the purpose of the present invention.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A network topology identification method is applied to an LED display screen control system comprising a sending card, a plurality of switches and a plurality of receiving cards, wherein the plurality of receiving cards are connected with the sending card through the plurality of switches; the network topology identification method comprises the following steps:
outputting a first broadcast packet containing a first mark value by a sending card, receiving a first response packet formed by the first broadcast packet after passing through the plurality of switches and the plurality of receiving cards, and performing mark value filtering on the first response packet to determine a backup relationship between interfaces of the sending card connected with the plurality of switches;
outputting a second broadcast packet containing a second mark value by a sending card, receiving a second response packet formed by the second broadcast packet passing through the plurality of switches and the plurality of receiving cards and increasing switch node information one by one, and analyzing the node information of the second response packet to determine the backup relationship among the plurality of switches;
outputting a third broadcast packet containing a third mark value by a sending card, receiving a third response packet formed by the third broadcast packet passing through the plurality of switches and the plurality of receiving cards and increasing switch node information and receiving card node information one by one, and analyzing the node information of the third response packet to determine the network port connection relation among the switches which are backup switches and the receiving card topology relation connected among the network ports.
2. The network topology identification method of claim 1, wherein in the course of the first broadcast packet passing through the plurality of switches and the plurality of receiving cards, the switches and the receiving cards perform node information replacement for the first broadcast packet but maintain a flag value included in the first broadcast packet as the first flag value so that the first response packet includes the first flag value.
3. An LED display screen control system, comprising: the system comprises a sending card, a plurality of switches and a plurality of receiving cards, wherein the receiving cards are connected with the sending card through the switches;
wherein the transmitter card is to:
outputting a first broadcast packet containing a first tag value, receiving a first response packet formed by the first broadcast packet after passing through the plurality of switches and the plurality of receiving cards, and performing tag value filtering on the first response packet to determine a backup relationship between interfaces of the sending card connected with the plurality of switches;
outputting a second broadcast packet containing a second tag value, receiving a second response packet formed by the second broadcast packet passing through the plurality of switches and the plurality of receiving cards and increasing switch node information one by one, and performing node information analysis on the second response packet to determine backup relationships among the plurality of switches;
outputting a third broadcast packet containing a third flag value, receiving a third response packet formed by the third broadcast packet passing through the plurality of switches and the plurality of receiving cards and adding switch node information and receiving card node information one by one, and performing node information analysis on the third response packet to determine the network port connection relationship between switches which are back-up to each other in the plurality of switches and the receiving card topology relationship connected between the network ports.
4. The LED display screen control system of claim 3, wherein the switch and the receiving card perform node information replacement for the first broadcast packet while maintaining the flag value included in the first broadcast packet as the first flag value so that the first response packet includes the first flag value, in the course of the first broadcast packet passing through the switches and the receiving cards.
5. The LED display screen control system according to claim 3 or 4, wherein a plurality of receiving card strings are connected between the network ports between the switches that are backup to each other, and each receiving card string includes one receiving card or a plurality of cascaded receiving cards.
6. The LED display screen control system of claim 3 or 4, wherein each of the switches is a splitter, the splitter including a control interface, a controller, a first transceiver electrically connected between the control interface and the controller, a plurality of net ports, and a plurality of Ethernet PHY chips electrically connected between the plurality of net ports and the controller, respectively, the control interface for electrically connecting the transmitter card.
7. The LED display screen control system of claim 6, wherein the controller comprises an FPGA device or an ASIC chip.
8. The LED display screen control system of claim 6, wherein the splitter further comprises: the cascade interface is used for electrically connecting the other deconcentrator.
9. The LED display screen control system of claim 8, wherein the transmitter card comprises a video input interface circuit, a programmable logic device electrically connected to the video input interface circuit, a plurality of optical ports, and a plurality of optical modules electrically connected between the plurality of optical ports and the programmable logic device, respectively; the control interface of the deconcentrator is an optical port, and the first transceiver is an optical module.
10. The LED display screen control system of claim 8, wherein the transmitter card comprises a video input interface circuit, a programmable logic device electrically connected to the video input interface circuit, a plurality of second ports, and a plurality of second ethernet PHY chips electrically connected between the plurality of second ports and the programmable logic device, respectively; the control interface of the deconcentrator is an internet access, and the first transceiver is an ethernet PHY chip.
CN202011294975.1A 2020-11-18 2020-11-18 Network topology identification method and LED display screen control system Active CN114519970B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011294975.1A CN114519970B (en) 2020-11-18 2020-11-18 Network topology identification method and LED display screen control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011294975.1A CN114519970B (en) 2020-11-18 2020-11-18 Network topology identification method and LED display screen control system

Publications (2)

Publication Number Publication Date
CN114519970A true CN114519970A (en) 2022-05-20
CN114519970B CN114519970B (en) 2023-08-15

Family

ID=81594116

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011294975.1A Active CN114519970B (en) 2020-11-18 2020-11-18 Network topology identification method and LED display screen control system

Country Status (1)

Country Link
CN (1) CN114519970B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204857144U (en) * 2015-07-24 2015-12-09 西安诺瓦电子科技有限公司 Led display screen control system and sending card
CN107145316A (en) * 2017-04-14 2017-09-08 西安诺瓦电子科技有限公司 Display screen control system and display controller
CN209183247U (en) * 2018-11-07 2019-07-30 深圳市灵星雨科技开发有限公司 A kind of LED display control unit
CN111314023A (en) * 2020-02-18 2020-06-19 中国电子科技集团公司第五十四研究所 Synchronization method of tree network topology information
CN111324321A (en) * 2018-12-14 2020-06-23 西安诺瓦星云科技股份有限公司 Display control card, display control system and vehicle
CN211019067U (en) * 2019-12-16 2020-07-14 西安诺瓦星云科技股份有限公司 Data exchange device, display control system, and display system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204857144U (en) * 2015-07-24 2015-12-09 西安诺瓦电子科技有限公司 Led display screen control system and sending card
CN107145316A (en) * 2017-04-14 2017-09-08 西安诺瓦电子科技有限公司 Display screen control system and display controller
CN209183247U (en) * 2018-11-07 2019-07-30 深圳市灵星雨科技开发有限公司 A kind of LED display control unit
CN111324321A (en) * 2018-12-14 2020-06-23 西安诺瓦星云科技股份有限公司 Display control card, display control system and vehicle
CN211019067U (en) * 2019-12-16 2020-07-14 西安诺瓦星云科技股份有限公司 Data exchange device, display control system, and display system
CN111314023A (en) * 2020-02-18 2020-06-19 中国电子科技集团公司第五十四研究所 Synchronization method of tree network topology information

Also Published As

Publication number Publication date
CN114519970B (en) 2023-08-15

Similar Documents

Publication Publication Date Title
CN106817249B (en) FC-AE-1553 simulation communication demonstration system and data transmission method
CN116501681B (en) CXL data transmission board card and method for controlling data transmission
US9712901B2 (en) Interconnection system, apparatus, and data transmission method
US20200076925A1 (en) Software-defined Interconnection Method and Apparatus for Heterogeneous Protocol Data
CN113660140B (en) Service function chain fault detection method based on data control plane hybrid sensing
CN102891813A (en) Ethernet port architecture supporting multiple transmission modes
US8938163B2 (en) Method and system for hybrid multi-layer mesh restoration in a communication network
US20140040679A1 (en) Relay device and recovery method
CN104221396A (en) Scalable optical broadcast interconnect
CN104158586B (en) Switching realization method, sites and system
CN108462904B (en) Protection group switching method based on hardware and optical communication equipment
CN105573922A (en) Method and device for realizing data format conversion
CN110062303B (en) Mesh network-based self-adaptive high-capacity cross optical communication equipment architecture
CN108718287B (en) Data exchange system, establishment method and device thereof and communication system
US9379938B2 (en) Method and system for SOAM flow switching
CN114519970A (en) Network topology identification method and LED display screen control system
CN113014880A (en) Multisource image sharing system based on high-speed data exchange
CN103716258B (en) High-density line card, switching device, cluster system and electric signal type configuration method
KR100745674B1 (en) Packet processing apparatus and method with multiple switching ports support structure and packet processing system using the same
US9077469B2 (en) Adapting apparatus and method
CN106160844B (en) The test method and device of automatically switching optical networks channel transceiver path consistency
CN101908923B (en) Overall self-detecting system and method
US20060159212A1 (en) Method and system for discovering circuits in a network
CN113473267A (en) Data transmission method, device and communication device
CN104022829A (en) Ethernet optical transmission link with single Ethernet port converged outputting at center end

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant