CN105429902A - Double-main-control-board network system - Google Patents
Double-main-control-board network system Download PDFInfo
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- CN105429902A CN105429902A CN201510757740.4A CN201510757740A CN105429902A CN 105429902 A CN105429902 A CN 105429902A CN 201510757740 A CN201510757740 A CN 201510757740A CN 105429902 A CN105429902 A CN 105429902A
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- master control
- signal transceiver
- network system
- signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/351—Switches specially adapted for specific applications for local area network [LAN], e.g. Ethernet switches
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/40—Constructional details, e.g. power supply, mechanical construction or backplane
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
Abstract
The invention discloses a double-main-control-board network system, and the system comprises a first main control board, a second main control board, a line card, and a configuration module, wherein the line card achieves the connection with a first main control board or a second main control board through an analog switch. The first and second main control boards are respectively provided with a first common mode circuit and a second common mode circuit for supply common mode voltages. The configuration module is used for configuring the first and second main control boards and a mode of a signal transceiver on the line card, so as to enable the common mode circuits to supply stable common mode voltages. The system replaces a conventional transformer through the common mode circuits, thereby saving the space of a circuit board; and replaces a conventional electromagnetic relay with a common mode switch, thereby avoiding electromagnetic interference.
Description
Technical field
The present invention relates to ethernet technology field, particularly relate to a kind of dual master control plate network system.
Background technology
For ensureing network system operational reliability, existing network system is all designed to master control system, one piece is done primary, another block does for subsequent use, the CPU of main control board is communicated with the FE 100-M network Ethernet on polylith line card by FE (FastEthernet, Fast Ethernet) 100-M network Ethernet, after generation standby usage master control borad switches, standby plate originally becomes main board, and new main board communicates with line card.Master control borad is selected to be responsible for the FE port communications with line card with the SWTICH exchange chip of built-in 100,000,000 PHY (physical interface), because in augmentative communication systems, line card in a machine frame reaches 22 pieces, and the SWITCH exchange chip so on master control borad at least Yao You 22 tunnel 100,000,000 nets the circuit of FE mouth.100 m ethernet circuit in line card needs to switch according to control signal, can communicate with two pieces of master control borads.
One path built-in PHY chip of the SWITCH chip on the master control borad of existing 100 m ethernet is linked backboard by transformer and is communicated with line card, one has 22 such circuit, the size of each 100,000,000 transformers is long 12.7mm, wide 9.4mm, high 6mm, and consider based on maintenanceability, due to the impact of the height of transformer, the service clearance of flatiron is stretched into when must reserve peripheral devices maintenance, space is dodged in the maintenance probably respectively reserving 10mm in the surrounding of transformer, PCB (the printedcircuitboard that each like this 100,000,000 transformers take, printed circuit board (PCB)) the about long 12.7mm+10mm=22.7mm in space, wide 9.4mm+10mm=19.4mm, the board dimension definition of a 19inch standard PC case is about long 280mm, wide 200mm, area is 280mm*200mm=56000mm2, the general area of 22 road transformer circuit is 22.7mm*19.4mm*22=9688.36mm2, account for 9688.36mm2/56000mm2, be greater than the PCB space of 1/6th, device on master control borad is many, there are cpu chip, SWTICH chip, RAM chip, FLASH chip, CPLD chip and clock chip etc., cause the problem that PCB arrangement space is inadequate.Existing design reduction service clearance reaches the object of saving PCB space, and so this way certainly will increase the maintenance difficulty of veneer, and the port density of veneer is restricted.In addition line card be reach will with the object of the FE port communications of two pieces of master control borads, select electromagnetic relay to switch according to control signal and select and the FE port communications of which block master control borad.Right relay is made up of iron core, coil and armature, and volume is large, and during running, noise is large, easily produce electromagnetic interference, and the relay contact life-span is short, sensitivity.
Therefore, how to propose a kind of new dual master control network system, to avoid the many disappearances caused by existing master control borad employing design of transformer, the design of line card employing electromagnetic relay, become a difficult problem of urgently capturing at present in fact.
Summary of the invention
In view of the disappearance of above-mentioned prior art, one of the present invention object is to propose a kind of new dual master control plate network system, and its master control borad is without the need to adopting design of transformer to save pcb board space and to be convenient to maintenance.
Another object of the present invention be propose a kind of new dual master control network system, its line card without the need to adopting electromagnetic relay, with avoid electromagnetic interference and reduce circuit power consumption.
For reaching above-mentioned and other object, the present invention proposes a kind of dual master control plate network system, comprising: the first master control borad, the first common-mode circuit comprising the first signal transceiver and be connected with this first signal transceiver telecommunications; Second master control borad, the second common-mode circuit comprising secondary signal transceiver and be connected with this secondary signal transceiver telecommunications; Line card, comprise the 3rd signal transceiver and switch, wherein, one end of this switch is connected with the 3rd signal transceiver, the other end is connected with this first common-mode circuit, the second common-mode circuit respectively, can realize this line card and the first master control borad or the second master control borad be electrically connected through this switch; And configuration module, for carrying out pattern configurations to this first, second and third signal transceiver.
This first, second and third signal transmitting and receiving block configuration can be become to forbid auto negotiation mode, forces 100,000,000 patterns or force full-duplex mode by above-mentioned configuration module.
The RC circuit of first, second common-mode circuit above-mentioned all for being made up of electric capacity and resistance.Further, this this capacitances in series between first, second signal transceiver and the 3rd signal transceiver for occurring/data wire of Received signal strength, for intercepting direct current signal.
Above-mentioned switch is analog switch.
This first, second signal transceiver is that signal transmitting and receiving switches chip, the 3rd signal transceiver is physical interface chip.Further, this configuration module is that pin that this signal transmitting and receiving of configuration switches chip and physical interface chip carries out pattern configurations or this configuration module carries out pattern configurations through software mode to the pin that this signal transmitting and receiving switches chip and physical interface chip.
Compared with prior art, the common-mode circuit that the present invention is mainly formed with electric capacity, resistance replaces the design of transformer of prior art, therefore can save circuit board space, improves circuit board and safeguards convenience.In addition, the present invention replaces the electromagnetic relay of prior art with analog switch, and electromagnetism can be avoided to bother.Moreover the present invention can pass through hardware pins setting or first, second, third signal transceiver is configured to forbid auto-negotiation, forces the pattern of 100,000,000 and pressure full duplex by software mode, promotes the stability of the signal of telecommunication that common-mode circuit provides.
Accompanying drawing explanation
Below by clearly understandable mode, accompanying drawings preferred implementation, is further described a kind of above-mentioned characteristic of dual master control plate network system, technical characteristic, advantage and implementation thereof.
Fig. 1 is a kind of dual master control plate of the present invention network system basic framework schematic diagram;
Fig. 2, Fig. 3 are the common-mode voltage pulse pattern that the present invention relates to.
Drawing reference numeral illustrates:
10. master control borad, 11. master control borads, 12. line cards, 13. configuration modules, 100. signal transceivers, 101. common-mode circuits, 110. signal transceivers, 111. common-mode circuits, 120. signal transceivers, 121. switchs.
Embodiment
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, contrast accompanying drawing is illustrated the specific embodiment of the present invention below.Apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, and obtain other execution mode.
For making simplified form, only schematically show part related to the present invention in each figure, they do not represent its practical structures as product.In addition, be convenient to make simplified form understand, there are the parts of same structure or function in some figure, only schematically depict one of them, or only marked one of them.In this article, " one " not only represents " only this ", also can represent the situation of " more than one ".
Person is the dual master control plate network system basic framework schematic diagram of the present invention as shown in Figure 2.As shown in Figure 2, this system comprises master control borad 10, master control borad 11, line card 12 and configuration module 13, wherein master control borad 10 comprises signal transceiver 100 and common-mode circuit 101 further, master control borad 11 comprises signal transceiver 110 and common-mode circuit 111 further, and line card 12 comprises signal transceiver 120 and switch 121 further.Below namely each part of the present invention is described in detail.
In master control borad 10, signal transceiver 100 and common-mode circuit 101 are electrically connected.In master control borad 11, signal transceiver 110 and common-mode circuit 111 are electrically connected.Signal transceiver 120 in line card 12 is connected with switch 121 one end, and switch 121 other end is connected with common-mode circuit 101, common-mode circuit 111 respectively, through this kind of connected mode, line card 12 can pass through its switch 121 and realizes being connected with master control borad 10 or master control borad 11.For example, master control borad 10 is as main board, master control borad 11 as subsequent use, and when master control borad 10 breaks down, switch 121 suspension control signal triggers line card 12 to switch and is connected to master control borad 11 and then realizes the object that line card 12 realizes communicating with master control borad 11.
In the present invention, configuration module 13 can carry out pattern configurations to above-mentioned signal transceiver 100,110,120 to be made it be in such as to forbid auto negotiation mode, forces 100,000,000 patterns or force full-duplex mode.
In specific embodiments of the invention, above-mentioned common-mode circuit 101,111 is the RC circuit of electric capacity and group electricity composition, and switch 121 opens the light for simulation, such as single-pole double-throw switch (SPDT).Above-mentioned signal transceiver 100,110 is signal transmitting and receiving chip (SWITCH chip), and signal transceiver 120 is physical interface chip (PHY chip).And this configuration module 13 can pass through hardware pins configuration mode or above-mentioned signal transceiver is carried out pattern configurations by software mode.
The present invention mainly provides the design of transformer in existing 100,000,000 networks of common-mode voltage replacement with RC circuit, master control borad 10,11 is connected by backboard with line card 12, and such as 0.1uF coupling capacitance that master control borad 10,11 and the transmission of line card 12 and the data wire of Received signal strength are connected.The effect of coupling capacitance is logical interchange; remove direct current; because 100 m ethernet sends signal differential to different with the common-mode voltage of Received signal strength differential pair; therefore stopping direct current must be carried out by such as 0.1uF coupling capacitance; in addition because line card 12, master control borad 10,11 support the hot plug of backboard; if the situations such as pin appear falling in connector during plug plate, can cause the problems such as short circuit, at this moment electric capacity just plays the effect of protection circuit.
Existing have in the design of transformer, the transmission signal differential of PHY chip (i.e. above-mentioned signal transceiver 120) to TPTX+/-and Received signal strength differential pair TPRX+/-on electric current from the power supply that transformer center tap connects, in transformerless design, in order to provide the electric current on differential pair, by a termination power of the such as 50ohm build-out resistor of differential pair, differential pair is by 50ohm resistance from power taking power supply, and the resistance that electric current flows through 50ohm can produce IR pressure drop.
Under 100,000,000 net 100BASE-TX patterns, the transmission signal differential of PHY chip (i.e. above-mentioned signal transceiver 120) to TPTX+/-and Received signal strength differential pair TPRX+/-need the constant current getting such as 40mA, therefore IR pressure drop is 50ohm*40mA=2V, therefore on differential pair, common-mode voltage is stable, is 3.3V – 2V=1.3V.Again because the three level signal of the differential pair of 100-M network Ethernet, 1V, 0V and-1V, reference point centered by common-mode voltage, therefore the three level of signal is 2.3V, 1.3V and 0.3V.
Auto-negotiation mode be port according to the connection speed of other end equipment and dual-mode, automatically its mode of operation is adjusted to the highest public level, i.e. the circuit two ends prestissimo that can have and dual-mode.If auto-negotiation is all supported in two ends, then all can receive the FLP (connecting pulse fast) of the other side, and the information decoding in FLP out.Obtain the concatenation ability of the other side.And the auto-negotiation ability value of opposite end is recorded in the capabilities register of auto-negotiation opposite end, and the auto-negotiation of status register is completed bit is set to 1 simultaneously.When auto-negotiation does not complete, this bit is 0 always.
Then the respective maximum concatenation ability according to oneself and the other side, selects best connected mode Link.Such as, if namely both sides support that 10M also supports 100M, then speed connects according to 100M; Namely both sides support that full duplex also supports half-duplex, then connect according to full duplex.Once after connection establishment, FLP just stops sending.
In auto-negotiation process, the differential pair of PHY chip (i.e. above-mentioned signal transceiver 120) is before connection pulse, process neutralizes obtaining current below, signal has IR voltage drop, not obtaining current At All Other Times, signal, without IR voltage drop, will cause the common-mode voltage of signal in negotiations process unstable like this.As shown in Figure 2, the connection impulse waveform of common-mode voltage instability as shown in Figure 3 for normal connection impulse waveform.So, the connection pulse shown in Fig. 3 can not be normally identified.In order to address this problem, the SWITCH chip (i.e. above-mentioned signal transceiver 100,110) containing built-in PHY on the PHY chip (i.e. above-mentioned signal transceiver 120) on line card and master control borad 10,11 is arranged to forbid auto negotiation mode through above-mentioned configuration module 13 by the present invention.In the present invention, two ports are all the internal ports of system, ability to work is known, it is all the mode of operation of support 100,000,000 and full duplex, therefore can pass through the pin of above-mentioned configuration module 13 configuring chip or the chip at two ends be all arranged to forbid auto-negotiation by software mode, force 100,000,000 and force the pattern of full duplex, above-mentioned capacitive coupling, build-out resistor provide the circuit of common-mode voltage just can normally work.
In addition, line card 12 side adopts analog switch chip (i.e. above-mentioned switch 121) to realize 100,000,000 signal switching of a line card, thus the function that realization and the 100-M network Ethernet of two pieces of master control borads communicate respectively.Analog switch chip is different from electromagnetic relay, can not receive negative level, because the common-mode voltage that build-out resistor provides is 1.3V, 100-M network Ethernet line signal voltage level is 2.3V, 1.3V and 0.3V, can ensure that analog switch chip normally works.In addition, the principle of the placement of the biasing resistor of analog switch both sides is the sides being placed on signal source, biased signal will be there is no like this, be superimposed with common-mode voltage to be biased, ensure that signal voltage does not have negative voltage, on line card PHY chip (i.e. above-mentioned signal transceiver 120) transmission signal to TPTX+/-be PHY export, so biasing resistor is placed on the left side of analog switch, on line card PHY chip Received signal strength to RPTX+/-be SWITCH chip (the i.e. above-mentioned signal transceiver 100 of master control borad, 110) send, so biasing resistor is placed on the right side of analog switch.
A whole set of circuit coordinates the configuration of software or hardware pins again, achieves transformerless 100 m ethernet design in dual master control plate network system.Replace existing electromagnetic relay with analog switch in addition, can electromagnetic interference be avoided, and there is the advantage reducing circuit effect.
It should be noted that above-described embodiment all can independent assortment as required.The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. a dual master control plate network system, is characterized in that, comprising:
First master control borad, the first common-mode circuit comprising the first signal transceiver and be connected with this first signal transceiver telecommunications;
Second master control borad, the second common-mode circuit comprising secondary signal transceiver and be connected with this secondary signal transceiver telecommunications;
Line card, comprise the 3rd signal transceiver and switch, wherein, one end of this switch is connected with the 3rd signal transceiver, the other end is connected with this first common-mode circuit, the second common-mode circuit respectively, can realize this line card and the first master control borad or the second master control borad be electrically connected through this switch; And
Configuration module, for carrying out pattern configurations to this first, second and third signal transceiver.
2. dual master control plate network system as claimed in claim 1, is characterized in that: this first, second and third signal transmitting and receiving block configuration can be become to forbid auto negotiation mode, forces 100,000,000 patterns or force full-duplex mode by this configuration module.
3. dual master control plate network system as claimed in claim 1, is characterized in that: this first, second common-mode circuit is all for forming RC circuit by electric capacity and resistance.
4. dual master control plate network system as claimed in claim 3, is characterized in that: this capacitances in series between first, second signal transceiver and the 3rd signal transceiver for occurring/data wire of Received signal strength, for intercepting direct current signal.
5. dual master control plate network system as claimed in claim 1, is characterized in that: this switch is analog switch.
6. dual master control plate network system as claimed in claim 1, is characterized in that: this first, second signal transceiver is that signal transmitting and receiving switches chip, the 3rd signal transceiver is physical interface chip.
7. dual master control plate network system as claimed in claim 6, is characterized in that: this configuration module is that the pin of this signal transmitting and receiving of configuration switching chip and physical interface chip carries out pattern configurations.
8. dual master control plate network system as claimed in claim 6, is characterized in that: this configuration module carries out pattern configurations through software mode to the pin that this signal transmitting and receiving switches chip and physical interface chip.
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| CN201510757740.4A CN105429902B (en) | 2015-11-10 | 2015-11-10 | A kind of dual master control plate network system |
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| CN201510757740.4A CN105429902B (en) | 2015-11-10 | 2015-11-10 | A kind of dual master control plate network system |
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| CN105429902A true CN105429902A (en) | 2016-03-23 |
| CN105429902B CN105429902B (en) | 2018-07-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111131087A (en) * | 2019-12-13 | 2020-05-08 | 威创集团股份有限公司 | Transmission system and signal transmission method for Ethernet physical layer signal |
| CN113297108A (en) * | 2021-05-26 | 2021-08-24 | 上海创景信息科技有限公司 | Circuit structure suitable for half-duplex bus signal direction control and control method |
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| CN111131087A (en) * | 2019-12-13 | 2020-05-08 | 威创集团股份有限公司 | Transmission system and signal transmission method for Ethernet physical layer signal |
| CN111131087B (en) * | 2019-12-13 | 2021-07-16 | 威创集团股份有限公司 | Transmission system and signal transmission method for Ethernet physical layer signal |
| CN113297108A (en) * | 2021-05-26 | 2021-08-24 | 上海创景信息科技有限公司 | Circuit structure suitable for half-duplex bus signal direction control and control method |
| CN113297108B (en) * | 2021-05-26 | 2023-11-10 | 上海创景信息科技有限公司 | Circuit structure and control method suitable for half-duplex bus signal direction control |
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| CN105429902B (en) | 2018-07-31 |
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Effective date of registration: 20201216 Address after: Dai Xi Zhen Shang Qiang Lu, Wuxing District, Huzhou City, Zhejiang Province Patentee after: HUZHOU AIDI ELECTRIC Co.,Ltd. Address before: 201616 No. 3666 Sixian Road, Songjiang District, Shanghai Patentee before: Phicomm (Shanghai) Co.,Ltd. |
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Effective date of registration: 20230106 Address after: 313000 room 1019, Xintiandi commercial office, Yishan street, Wuxing District, Huzhou, Zhejiang, China Patentee after: Huzhou YingLie Intellectual Property Operation Co.,Ltd. Address before: Dai Xi Zhen Shang Qiang Lu, Wuxing District, Huzhou City, Zhejiang Province Patentee before: HUZHOU AIDI ELECTRIC Co.,Ltd. |