CN101009542B - Extension device of data network node device port - Google Patents
Extension device of data network node device port Download PDFInfo
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- CN101009542B CN101009542B CN200610011299A CN200610011299A CN101009542B CN 101009542 B CN101009542 B CN 101009542B CN 200610011299 A CN200610011299 A CN 200610011299A CN 200610011299 A CN200610011299 A CN 200610011299A CN 101009542 B CN101009542 B CN 101009542B
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Abstract
The invention discloses an expansion device for the device ports of data network node that includes several interfaces which are used to connect with the network node device, and also includes a pair of switch chip of low voltage difference signal crossing point and a logic circuit for switch control; the interface is connected with the switch chip of low voltage difference signal, one interface connects with one network node device, a pair of switch chip of low voltage difference signal crossing point are connected with the logic circuit for switch control separately, the data is transmitted from one network node device to other network node device; the switch control logic circuit selects the device which is used to transmitted the data according to the requirement of application dynamically to realize the time-division transmission between the device of network node. The invention provides an effectively means for realizing one device with 200Mbps spacewire data network to connect with four device, and also provide an effective method for reducing the system cost.
Description
Technical field
The present invention relates to data network node device, particularly a kind of expanding unit of spaceWire data network node device port.
Background technology
SpaceWire is that European Space Agency is based on two commercial standard (CS) IEEE 1355-1995 and IEEE 1596.3 (LVDS), variation by to aspects such as IEEE 1355 reliabilities, power consumptions makes it can satisfy a kind of standard that is used for Serial Data Transfer Mode that requirement proposed of aerospace applications better.The purpose that this bus standard proposes is in transducer, processing unit, mass storage unit and descending telemetry subsystem etc. can being connected in the future a unified high-speed data processing structure.One of its main target is to reuse at parts and the support of subsystem irrespective of size, all is very significant and reuse for reducing development cost, improving reliability and increase work efficiency.The great advantage of this technology is exactly that initial requirement of just using according to the space designs.
SpaceWire has adopted at present widely used DS (DataStrobe) data sync encoding scheme in the high-speed serial data transmission in the world, by circuit handoff technique and agreement, can use multiple bus simultaneously in the network, network topology has the very high degree of freedom, therefore, even the data transmission bauds of each connection of machinery compartment is not high, still can improve the data transmission bauds of whole network by the method that increases bus number.Bus-networks such as IEEE 1394, MIL-STD-1553B then are to make the shared whole network of all equipment, and therefore whole data transmission bauds can not surpass the performance that connects, and networks development trend makes it have switching performance exactly at present.
In data transmission network, the interconnection of many equipment is important problem, and in the prior art, the speed of network node device is 200Mbps, can realize the direct interconnection with other three equipment under the situation of not using switch at most.And Primary Component-switch of forming many device networks system does not have the device of 200Mbps at present, and the switch IP of 200Mbps is soft to be endorsed to buy although have at present, and purchase and reliable realization and cost thereof on FPGA/CPLD also require careful consideration.In addition, consider the actual conditions in the application, can finish the switch that carries out data communication with any apparatus at any time is not under any circumstance all to need, and under many circumstances, transfer of data is carried out in needed just apparatus for network node and other equipment timesharing respectively.According to the thought of timesharing transmission, provide a kind of port expansion device of apparatus for network node to become a kind of possibility.
Summary of the invention
The objective of the invention is to overcome prior art under the situation of not using switch, can only realize direct interconnection at most with three apparatus for network node, can not satisfy with more than the problem of four equipment direct interconnection, realize and four or more the expanding unit of data network node device port of apparatus for network node direct interconnection thereby provide a kind of.
To achieve these goals, the invention provides a kind of expanding unit of data network node device port, comprise a plurality of interfaces that are used for being connected usefulness with outside apparatus for network node, also comprise the first Low Voltage Differential Signal cross point switches chip 1, the second Low Voltage Differential Signal cross point switches chip 1 ' and circuit switched control logic circuit 2; Wherein, the described first Low Voltage Differential Signal cross point switches chip 1 is connected with described circuit switched control logic circuit 2 with the described second Low Voltage Differential Signal cross point switches chip 1 ' respectively; The Low Voltage Differential Signal cross point switches chip of the described first Low Voltage Differential Signal cross point switches chip 1 and the second Low Voltage Differential Signal cross point switches chip 1 ' be 4 * 4 or 6 * 6 or 8 * 8;
First interface on the described expanding unit by the described first Low Voltage Differential Signal cross point switches chip 1 send data on the described expanding unit other two or three or four interfaces; Described first interface by the described second Low Voltage Differential Signal cross point switches chip 1 ' from the described expanding unit other two or three or four interfaces receive data; On the described expanding unit other two or three or four interfaces are connected with the apparatus for network node of outside respectively, thereby realize the transmission of data from an apparatus for network node to another apparatus for network node; Described circuit switched control logic circuit 2 carries out Dynamic Selection according to demands of applications to the apparatus for network node that carries out transfer of data, realizes the timesharing transmission of data between described apparatus for network node.
In the technique scheme, when the Low Voltage Differential Signal cross point switches chip of the described first Low Voltage Differential Signal cross point switches chip 1 and the second Low Voltage Differential Signal cross point switches chip 1 ' be 4 * 4, described expanding unit comprises first interface, second interface and the 3rd interface, wherein, described first interface be connected the described first Low Voltage Differential Signal cross point switches chip 1 and the described second Low Voltage Differential Signal cross point switches chip 1 ' an end, described second interface and described the 3rd interface be connected the described first Low Voltage Differential Signal cross point switches chip 1 and the described second Low Voltage Differential Signal cross point switches chip 1 ' the other end.
In the technique scheme, when the Low Voltage Differential Signal cross point switches chip of the described first Low Voltage Differential Signal cross point switches chip 1 and the second Low Voltage Differential Signal cross point switches chip 1 ' be 6 * 6, described expanding unit comprises first interface, second interface, the 3rd interface and the 4th interface; Wherein, described first interface be connected the described first Low Voltage Differential Signal cross point switches chip 1 and the described second Low Voltage Differential Signal cross point switches chip 1 ' an end, described second interface, described the 3rd interface and described the 4th interface be connected the described first Low Voltage Differential Signal cross point switches chip 1 and the described second Low Voltage Differential Signal cross point switches chip 1 ' the other end.
In the technique scheme, when the Low Voltage Differential Signal cross point switches chip of the described first Low Voltage Differential Signal cross point switches chip 1 and the second Low Voltage Differential Signal cross point switches chip 1 ' be 8 * 8, described expanding unit comprises first interface, second interface, the 3rd interface, the 4th interface and the 5th interface; Wherein, described first interface be connected the described first Low Voltage Differential Signal cross point switches chip 1 and the described second Low Voltage Differential Signal cross point switches chip 1 ' an end, described second interface, described the 3rd interface, described the 4th interface and the 5th interface be connected the described first Low Voltage Differential Signal cross point switches chip 1 and the described second Low Voltage Differential Signal cross point switches chip 1 ' the other end.
In the technique scheme, described circuit switched control logic circuit 2 can be by microprocessor or FPGA/CPLD or the realization of spacewire intelligent communication chip.
The present invention is in the present circumstance for realizing that same equipment of 200Mbps level spacewire data network and direct interconnection more than four equipment provide a kind of effective means, simultaneously also for realizing that at concrete operating position reduction system of system cost provides a kind of effective ways.
Description of drawings
Fig. 1 is the structure chart of the expanding unit of data network node device port of the present invention;
Fig. 2 is the block diagram of selected in one embodiment DS90CP04 4 * 4 Low Voltage Differential Signal cross point switches chips;
Fig. 3 is the connected mode of expanding unit in system of data network node device port of the present invention.
The drawing explanation
1 Low Voltage Differential Signal cross point switches chip, 1 ' Low Voltage Differential Signal cross point switches chip
2 circuit switched control logic circuit A interface B interface C interfaces
Embodiment
Be described further below in conjunction with the expanding unit of the drawings and specific embodiments data network node device port of the present invention.
As shown in Figure 1, in one embodiment, the expanding unit of data network node device port of the present invention comprises: Low Voltage Differential Signal cross point switches chip 1, Low Voltage Differential Signal cross point switches chip 1 ', circuit switched control logic circuit 2, interface A, interface B and interface C.
The low pressure differential signal cross point switches chip of described Low Voltage Differential Signal (LVDS) cross point switches chip 1 and Low Voltage Differential Signal cross point switches chip 1 ' be a pair of 4 * 4, low pressure differential signal cross point switches chip 1 is connected with circuit switched control logic circuit 2 with Low Voltage Differential Signal cross point switches chip 1 ' respectively, and the effect of Low Voltage Differential Signal cross point switches chip is that the data that will satisfy the spaceWire standard are transferred to another apparatus for network node from an apparatus for network node.Fig. 2 is the block diagram of DS90CP04 4 * 4 Low Voltage Differential Signal cross point switches chips.
The function of described circuit switched control logic circuit 2 is according to the demand of system applies the equipment that carries out transfer of data to be carried out Dynamic Selection, realizes the timesharing transmission of data between apparatus for network node.Circuit switched control logic circuit 2 can pass through microprocessor, FPGA/CPLD or spacewire intelligent communication chip to be realized.
Described interface A, interface B and interface C are be connected with the outside apparatus for network node interfaces of usefulness of the expanding unit of data network node device port of the present invention, the structure of each interface is all identical with function, is that the external equipment that is connected there are differences.In the present embodiment, interface A links to each other with the apparatus for network node A of outside, and interface B links to each other with the apparatus for network node B of outside, and interface C links to each other with the apparatus for network node C of outside.Interface A is when sending data and clock signal, link to each other with interface B and interface C by Low Voltage Differential Signal cross point switches chip 1, this moment, interface B and interface C received data and clock signal, interface A when receiving data with clock signal by Low Voltage Differential Signal cross point switches chip 1 ' link to each other with interface C with interface B, interface B and interface C transmission data and clock signal at this moment.Low Voltage Differential Signal cross point switches chip 1 has been realized the transmission of data from apparatus for network node A to apparatus for network node B and C, Low Voltage Differential Signal cross point switches chip 1 ' realize the transmission of data from apparatus for network node B and C to apparatus for network node A.
As shown in Figure 3, demand according to system applies, under the control of circuit exchange control logic circuit 2, sometime the section in, apparatus for network node A sends to apparatus for network node B with D (data), S (clock) signal, simultaneously via Low Voltage Differential Signal cross point switches chip 1, apparatus for network node B via Low Voltage Differential Signal cross point switches chip 1 ', D, S signal are sent to apparatus for network node A.In another time period, apparatus for network node A sends to apparatus for network node C with D, S signal, simultaneously via Low Voltage Differential Signal cross point switches chip 1, apparatus for network node C via Low Voltage Differential Signal cross point switches chip 1 ', D, S signal are sent to apparatus for network node A.In Fig. 2, control by switch mode of operations such as sclk, mode, load, si on Low Voltage Differential Signal cross point switches chip control pin, be embodied as the switching of 4 * 4 right Low Voltage Differential Signal cross point switches chip related work states, thus the spacewire data network path of the device A that constructs timesharing to equipment B or device A to equipment C.Utilize the expanding unit of the data network node device port described in the present embodiment, a port of spacewire data network node device can be expanded to the port that two timesharing are used.
In the above-described embodiments, described Low Voltage Differential Signal cross point switches chip 1 and Low Voltage Differential Signal cross point switches chip 1 ' all adopt 4 * 4 Low Voltage Differential Signal cross point switches chip, in actual applications, can also adopt Low Voltage Differential Signal cross point switches chip of 6 * 6 or 8 * 8 etc. when the Low Voltage Differential Signal cross point switches chip of described Low Voltage Differential Signal cross point switches chip 1 and Low Voltage Differential Signal cross point switches chip 1 ' employing 6 * 6, it is the port that three timesharing are used that a port of data network node device can be expanded. when the Low Voltage Differential Signal cross point switches chip of described Low Voltage Differential Signal cross point switches chip 1 and Low Voltage Differential Signal cross point switches chip 1 ' employing 8 * 8, it is the port that four timesharing are used that a port of data network node device can be expanded. in addition, under the prerequisite that guarantees characteristics of signals, also can further enlarge the number of Extended Capabilities Port by the mode of paired chip being carried out cascade, as cascade, a port of spacewire data network node device can be expanded to the port that three timesharing are used by two pairs of 4 * 4 paired low pressure differential signal cross point switches chips.
Existing spacewire data network node device can be realized the direct interconnection with other three equipment at most under the situation of not using switch, utilize the expanding unit of data network node device port of the present invention, but originally the port that is connected with an equipment at least timesharing connect two equipment, can realize the direct interconnection of data network node device and four or more data network node device on the whole.
Claims (5)
1. the expanding unit of a data network node device port, comprise the interface that is used for being connected usefulness with outside apparatus for network node, it is characterized in that, also comprise the first Low Voltage Differential Signal cross point switches chip (1), the second Low Voltage Differential Signal cross point switches chip (1 ') and circuit switched control logic circuit (2); Wherein, the described first Low Voltage Differential Signal cross point switches chip (1) is connected with described circuit switched control logic circuit (2) respectively with the described second Low Voltage Differential Signal cross point switches chip (1 '); The described first Low Voltage Differential Signal cross point switches chip (1) and the second Low Voltage Differential Signal cross point switches chip (1 ') are 4 * 4 or 6 * 6 or 8 * 8 Low Voltage Differential Signal cross point switches chip;
First interface on the described expanding unit by the described first Low Voltage Differential Signal cross point switches chip (1) send data on the described expanding unit other two or three or four interfaces; Described first interface by the described second Low Voltage Differential Signal cross point switches chip (1 ') from the described expanding unit other two or three or four interfaces receive data; On the described expanding unit other two or three or four interfaces are connected with the apparatus for network node of outside respectively, thereby realize the transmission of data from an apparatus for network node to another apparatus for network node; Described circuit switched control logic circuit (2) carries out Dynamic Selection according to demands of applications to the apparatus for network node that carries out transfer of data, realizes the timesharing transmission of data between described apparatus for network node.
2. the expanding unit of data network node device port according to claim 1, it is characterized in that, when the described first Low Voltage Differential Signal cross point switches chip (1) and the second Low Voltage Differential Signal cross point switches chip (1 ') are 4 * 4 Low Voltage Differential Signal cross point switches chip, described expanding unit comprises first interface, second interface and the 3rd interface, wherein, described first interface is connected an end of described first Low Voltage Differential Signal cross point switches chip (1) and the described second Low Voltage Differential Signal cross point switches chip (1 '), and described second interface and described the 3rd interface are connected the other end of described first Low Voltage Differential Signal cross point switches chip (1) and the described second Low Voltage Differential Signal cross point switches chip (1 ').
3. the expanding unit of data network node device port according to claim 1, it is characterized in that, when the described first Low Voltage Differential Signal cross point switches chip (1) and the second Low Voltage Differential Signal cross point switches chip (1 ') were 6 * 6 Low Voltage Differential Signal cross point switches chip, described expanding unit comprised first interface, second interface, the 3rd interface and the 4th interface; Wherein, described first interface is connected an end of described first Low Voltage Differential Signal cross point switches chip (1) and the described second Low Voltage Differential Signal cross point switches chip (1 '), and described second interface, described the 3rd interface and described the 4th interface are connected the other end of described first Low Voltage Differential Signal cross point switches chip (1) and the described second Low Voltage Differential Signal cross point switches chip (1 ').
4. the expanding unit of data network node device port according to claim 1, it is characterized in that, when the described first Low Voltage Differential Signal cross point switches chip (1) and the second Low Voltage Differential Signal cross point switches chip (1 ') were 8 * 8 Low Voltage Differential Signal cross point switches chip, described expanding unit comprised first interface, second interface, the 3rd interface, the 4th interface and the 5th interface; Wherein, described first interface is connected an end of described first Low Voltage Differential Signal cross point switches chip (1) and the described second Low Voltage Differential Signal cross point switches chip (1 '), and described second interface, described the 3rd interface, described the 4th interface and the 5th interface are connected the other end of described first Low Voltage Differential Signal cross point switches chip (1) and the described second Low Voltage Differential Signal cross point switches chip (1 ').
5. the expanding unit of data network node device port according to claim 1 is characterized in that, described circuit switched control logic circuit (2) can be by microprocessor or FPGA/CPLD or the realization of spacewire intelligent communication chip.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610011299A CN101009542B (en) | 2006-01-27 | 2006-01-27 | Extension device of data network node device port |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610011299A CN101009542B (en) | 2006-01-27 | 2006-01-27 | Extension device of data network node device port |
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| CN101009542A CN101009542A (en) | 2007-08-01 |
| CN101009542B true CN101009542B (en) | 2010-05-12 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102487347B (en) * | 2009-12-18 | 2015-02-25 | 哈尔滨工业大学 | Space intelligent bus interface system and space intelligent network system using same |
| CN102624633B (en) * | 2012-04-06 | 2015-07-08 | 航天东方红卫星有限公司 | Time-trigger-based SpaceWire network communication method |
| CN104298159A (en) * | 2014-10-23 | 2015-01-21 | 福州天虹电脑科技有限公司 | Circuit structure of electromechanical equipment and working method |
| CN104811649B (en) * | 2015-04-29 | 2018-06-19 | 深圳市载德光电技术开发有限公司 | Video-frequency data transmission system based on FPGA |
| CN108108322A (en) * | 2017-12-27 | 2018-06-01 | 深圳市风云实业有限公司 | High speed serialization multiplexer |
| CN111263138B (en) * | 2018-12-03 | 2020-12-15 | 中国科学院沈阳自动化研究所 | LVDS digital video fault automatic detection system and implementation method thereof |
| CN110704349B (en) * | 2019-09-04 | 2020-12-25 | 北京航空航天大学 | SpaceWire node device for reliable data transmission |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128070A (en) * | 1994-05-04 | 1996-07-31 | 爱特梅尔股份有限公司 | Programmable logic device with regional and universal signal routing |
| CN1431808A (en) * | 2003-01-27 | 2003-07-23 | 西安电子科技大学 | Large capacity and expandable packet switching network structure |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128070A (en) * | 1994-05-04 | 1996-07-31 | 爱特梅尔股份有限公司 | Programmable logic device with regional and universal signal routing |
| CN1431808A (en) * | 2003-01-27 | 2003-07-23 | 西安电子科技大学 | Large capacity and expandable packet switching network structure |
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