CN102347910A - Dual-redundancy real-time network selection system - Google Patents
Dual-redundancy real-time network selection system Download PDFInfo
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- CN102347910A CN102347910A CN2011103792136A CN201110379213A CN102347910A CN 102347910 A CN102347910 A CN 102347910A CN 2011103792136 A CN2011103792136 A CN 2011103792136A CN 201110379213 A CN201110379213 A CN 201110379213A CN 102347910 A CN102347910 A CN 102347910A
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Abstract
The invention aims to provide a dual-redundancy real-time network selection system, which is connected to a plurality of equipment and a set of switch at the same time and used for controlling and selecting one equipment to surf the internet through discrete quantity. The main body of the dual-redundancy real-time network selection system is a large-scale FPGA (Field Programmable Gate Array). The large-scale FPGA comprises an outer control instruction receiving port, a sending control module, a receiving control module, a network configuration module for completing the initial configuration of six MAC (Multi-Access Computer) and the six MAC corresponding to four network pots and two switches. The dual-redundancy real-time network selection system disclosed by the invention has low delay characteristic; once the system needs to be switched, the level state of the discrete quantity is changed; the real-time network selection system switches another equipment to be connected to the switch to surf the internet; and the determinacy of networks is ensured.
Description
Technical field
The present invention relates to a kind of real-time network selective system, be used for the switching of a plurality of equipment of real-time network, make a plurality of equipment to select access network according to control command.
Background technology
Require the equipment of two redundancies all to connect online in the real-time network, but because the port number of switch is limited, two equipment can't be simultaneously on a port that connects switch.
For flight control system, the network interface card of equipment itself promptly has 2 redundant each other network interfaces, and two switches constitute a cover switch, and 2 network interfaces of a respectively corresponding equipment form A, B two paths.This moment, then two equipment can only be selected on the port of a connection switch if require to increase a redundance unit again.
Summary of the invention
The present invention aims to provide a kind of real-time network selective system, in order to realize connecting a plurality of equipment and a cover switch simultaneously, selects one of them equipment online through discrete magnitude control.
Technical scheme of the present invention is following:
Two remaining real-time network selective systems; Be arranged between equipment and the switch; Said equipment, switch all have two, and the network interface card of each equipment itself promptly has A, two network interfaces of B, and two equipment, two switches of A, B network interface and A, B separately form parallel A, B two paths of data transmission channel; The main body of this pair remaining real-time network selective system is large-scale F PGA, and said large-scale F PGA comprises external control command reception port, sends control module (TxCtrl), receives control module (RxCtrl), in order to the Network conf iotag. module (NetCfg) of the initial configuration of accomplishing six MAC and corresponding to six MAC that amount to of four network interfaces and two switches; Said transmission control module (TxCtrl) is provided with A channel and sends buffering area and B passage transmission buffering area, and said reception control module (RxCtrl) is provided with A channel and receives buffering area and B passage reception buffering area; Like this, A channel transmission/reception buffering area is corresponding to the A channel network interface and the switch A of two equipment, and B passage transmission/reception buffering area is corresponding to the B passage network interface and the switch b of two equipment; The A network interface of two equipment links through A channel transmission/reception buffering area and A switch on the A channel, and the B network interface of two equipment links with the B switch through B passage transmission/reception buffering area on the B passage.
Above-mentioned Network conf iotag. module (NetCfg) mainly comprises link rate configuration, CRC configuration, MAC Address configuration, transmission frame length configuration and house dog control circuit.
Above-mentioned A channel transmission/reception buffering area and B passage transmission/reception buffering area are formed by a plurality of sub-buffering area of static allocation pattern, and frame length is placed in first unit of each sub-buffering area, and remaining element is placed frame data.
The size of above-mentioned four buffering areas is 4096 * 32, and wherein each buffering area is made up of the sub-buffering area of 10 400 * 32 sizes.
Above-mentioned two equipment backup each other, and also can be different working equipment.
The present invention has the following advantages:
This real-time network selective system has the low characteristic that postpones, and Data transmission between switch and equipment in real time guarantees the certainty of network.
Select one of them equipment online through discrete magnitude control, another equipment is in the Hot Spare state.In case need to switch, the discrete magnitude level state changes, the equipment (another equipment) that the real-time network selective system is switched Hot Spare is connected to the switch online.
Description of drawings
Fig. 1 is real-time network selective system annexation figure;
Fig. 2 is a real-time network selective system theory diagram.
Embodiment
The real-time network selective system that the present invention proposes is two remaining ethernet networks, and each equipment is supported A, two Ethernet physical ports of B, is connected respectively on two real-time ethernet switches (switch A and switch b).The real-time network selective system be used for mutually redundant 2 equipment be connected to one the cover switch connecting path is provided, its annexation is as shown in Figure 1.Outer monitoring is judged two equipment (network interface card), through send the external control instruction to two remaining real-time network selective systems, selects to confirm that one of them equipment and switch foundation link.
The real-time network selective system adopts large-scale F PGA to realize, network selecting is through the selection control realization of MAC layer data interface, as shown in Figure 2.The real-time network selective system comprises 6 MAC, 1 Network conf iotag. module (NetCfg), 1 transmission control module (TxCtrl) and 1 reception control module (RxCtrl).
Network conf iotag. module is accomplished the work such as initial configuration of 6 MAC, and main deploy content comprises:
A. link rate configuration: according to the 10M/100M_IN signal, high level is configured to 100Mbps, and low level is configured to 10Mbps;
B.CRC configuration: dispose judgement, processing and increase that each MAC does not carry out CRC, keep the transmission of primitive frame between switch and end system;
The c.MAC address configuration: disposing each MAC initial address is: 00-00-00-00-00-00, do not carry out the filling of MAC Address when the MAC transmit frame is set;
D. transmission frame length configuration: configuration MAC does not limit the length of transmission frame, directly is transferred to destination even if occurred in the communication less than 64 bytes or greater than the frame of 1518 bytes yet.
In addition, Network conf iotag. module is also carried out the control of house dog, according to cycle hello the dog of 1s.Whole module resets during the house dog output low level.
Sending control module TxCtrl realizes from ES1 or ES2 received frame; Through cushioning the back according to network seletion signals QH_LINE_IN (from the external control instruction); Frame is transferred to switch,, receives the frame of ES2 during for low level when QH_LINE_IN receives the frame of ES1 during for high level.TxCtrl comprises 2 buffering area TX_buf, is respectively applied for passage A and channel B.4096 * 32 of each TX_buf sizes comprise 10 buffering areas, each 400 * 32 size.Frame length is put in first unit of buffering area, puts frame data afterwards.Read and write access through read-write pointer TX_buf_write and TX_buf_read control buffering area; TX_buf_write and TX_buf_read are 0 when initial; Revise write pointer TX_buf_write when ES sends, send and revise read pointer TX_buf_read when logic is fetched data the MAC that passes to the connection switch.The sky of judging buffering area through pointer state is full, and it is discontented up to buffering area to abandon the ES transmit frame when full.
Receive control module RxCtrl and realize, according to network seletion signals QH_LINE_IN frame is transferred to ES1 or ES2,, be transferred to ES2 during for low level when QH_LINE_IN is transferred to ES1 during for high level through the buffering back from the switch received frame.RxCtrl comprises 2 buffering area RX_buf, is respectively applied for passage A and channel B.4096 * 32 of RX_buf sizes comprise 10 buffering areas, each 400 * 32 size.Frame length is put in first unit of buffering area, puts frame data afterwards.Read and write access through read-write pointer RX_buf_write and RX_buf_read control buffering area; RX_buf_write and RX_buf_read are 0 when initial; Along with write pointer RX_buf_write is revised in the reception from the switch frame, receive and revise read pointer RX_buf_read when control logic is fetched data afterwards.Judge that through pointer state the sky of buffering area is full simultaneously, the frame that abandons new reception when full is discontented up to buffering area.
Claims (5)
1. two remaining real-time network selective systems; Be arranged between equipment and the switch; Said equipment, switch all have two; The network interface card of each equipment itself promptly has A, two network interfaces of B, and two equipment, two switches of A, B network interface and A, B separately form parallel A, B two paths of data transmission channel; It is characterized in that: the main body of this pair remaining real-time network selective system is large-scale F PGA, and said large-scale F PGA comprises external control command reception port, sends control module (TxCtrl), receives control module (RxCtrl), in order to the Network conf iotag. module (NetCfg) of the initial configuration of accomplishing six MAC and corresponding to six MAC that amount to of four network interfaces and two switches; Said transmission control module (TxCtrl) is provided with A channel and sends buffering area and B passage transmission buffering area, and said reception control module (RxCtrl) is provided with A channel and receives buffering area and B passage reception buffering area; The A network interface of two equipment links through A channel transmission/reception buffering area and A switch on the A channel, and the B network interface of two equipment links with the B switch through B passage transmission/reception buffering area on the B passage.
2. according to claim 1 pair of remaining real-time network selective system is characterized in that: said Network conf iotag. module (NetCfg) comprises link rate configuration, CRC configuration, MAC Address configuration, transmission frame length configuration and house dog control circuit.
3. according to claim 2 pair of remaining real-time network selective system; It is characterized in that: said A channel transmission/reception buffering area and B passage transmission/reception buffering area are formed by a plurality of sub-buffering area of static allocation pattern; Frame length is placed in first unit of each sub-buffering area, and remaining element is placed frame data.
4. according to claim 3 pair of remaining real-time network selective system is characterized in that: the size of four buffering areas is 4096 * 32, and wherein each buffering area is made up of the sub-buffering area of 10 400 * 32 sizes.
5. according to claim 4 pair of remaining real-time network selective system is characterized in that: two equipment backup each other or different working equipment.
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| CN201110379213.6A CN102347910B (en) | 2011-11-24 | 2011-11-24 | Dual-redundancy real-time network selection system |
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| CN201110379213.6A CN102347910B (en) | 2011-11-24 | 2011-11-24 | Dual-redundancy real-time network selection system |
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| CN102347910B CN102347910B (en) | 2014-05-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113525703A (en) * | 2021-09-06 | 2021-10-22 | 中国商用飞机有限责任公司 | Method and device for monitoring aircraft signals |
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| CN101132284A (en) * | 2006-08-23 | 2008-02-27 | 何自强 | Internet communication device |
| CN101202707A (en) * | 2007-12-03 | 2008-06-18 | 杭州华三通信技术有限公司 | Method for transmitting message of high speed single board, field programmable gate array and high speed single board |
| CN101335602A (en) * | 2008-06-11 | 2008-12-31 | 南京磐能电力科技股份有限公司 | Point-to-multipoint UDP real-time data transmitting and confirming method based on FPGA |
| CN102096648A (en) * | 2010-12-09 | 2011-06-15 | 深圳中兴力维技术有限公司 | System and method for realizing multipath burst data business caching based on FPGA (Field Programmable Gate Array) |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101132284A (en) * | 2006-08-23 | 2008-02-27 | 何自强 | Internet communication device |
| CN101202707A (en) * | 2007-12-03 | 2008-06-18 | 杭州华三通信技术有限公司 | Method for transmitting message of high speed single board, field programmable gate array and high speed single board |
| CN101335602A (en) * | 2008-06-11 | 2008-12-31 | 南京磐能电力科技股份有限公司 | Point-to-multipoint UDP real-time data transmitting and confirming method based on FPGA |
| CN102096648A (en) * | 2010-12-09 | 2011-06-15 | 深圳中兴力维技术有限公司 | System and method for realizing multipath burst data business caching based on FPGA (Field Programmable Gate Array) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113525703A (en) * | 2021-09-06 | 2021-10-22 | 中国商用飞机有限责任公司 | Method and device for monitoring aircraft signals |
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