CN102759891A - Hard handover dual-redundancy CAN controller - Google Patents
Hard handover dual-redundancy CAN controller Download PDFInfo
- Publication number
- CN102759891A CN102759891A CN2012101862707A CN201210186270A CN102759891A CN 102759891 A CN102759891 A CN 102759891A CN 2012101862707 A CN2012101862707 A CN 2012101862707A CN 201210186270 A CN201210186270 A CN 201210186270A CN 102759891 A CN102759891 A CN 102759891A
- Authority
- CN
- China
- Prior art keywords
- module
- bus
- switching
- register
- controller
- 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
Links
Images
Landscapes
- Hardware Redundancy (AREA)
- Communication Control (AREA)
Abstract
The invention discloses a hard handover dual-redundancy CAN controller, which is characterized by comprising a bus interface module, a handover control module, a first CAN bus controller module and a second CAN bus controller module, wherein the bus interface is used for data exchanging of an external bus with an on chip bus and responding; and the handover control module receives control and data signals from the two CAN bus controller modules and determines the states of the first CAN bus controller module and the second CAN bus controller module, judges whether handover is switched, and transmits the control and data signals to the bus interface module, the first CAN bus controller module and the second CAN bus controller module. The hard handover dual-redundancy CAN controller has the advantages of high handover efficiency, nanosecond level handover completing, capability of meeting the requirements of different reliabilities, wide application range, reduced software load, and simpleness and convenience for operation.
Description
Technical field:
The invention belongs to CAN bus communication field, be specifically related to two redundant manipulators that a kind of pure hardware switches.
Background technology:
The dual-redundant CAN bus system that uses is at present switched through software mostly, and switching efficiency is low, and switching condition is single, can not satisfy the requirement of network to different reliabilities; And adopt the redundant mode of dual controller dual bus, pattern is single, and node only can be operated under the redundant mode; The user need be configured two bus controllers, and system complex increases the software burden.Relevant patent achievement has dual-redundant CAN bus communication system and communication means thereof, dual-redundant CAN bus controller and message processing method thereof, the two redundant hot-swap of CAN bus system, two redundant hot-swap systems of CAN bus and hot change-over method.
The changing method of present double-redundancy CAN controller and redundant mode can not satisfy high switching efficiency, multiple reliability, the requirement of system flexibility and miniaturized system.
Summary of the invention:
The present invention is directed to requirement in practical systems, and the deficiency of on going result, propose a kind of pure hardware and switch, use flexibly double-redundancy CAN controller simple to operate.Specific as follows:
Technical solution of the present invention is a kind of double-redundancy CAN controller of direct-cut operation, and the function that can realize has: two kinds of mode of operations of redundant mode and non-redundant mode; Four kinds of different switching condition rank and switching commands; The non-prepass of working as is to user transparent; The handoff functionality of two CAN passages; The all functions of CAN controller.
For realizing above function, the double-redundancy CAN controller comprises four modules: bus interface module, switching controls module, two CAN bus controller modules.
Bus interface module provides wishbone EBI, non-data processing when prepass.The wishbone EBI is mainly used in the exchanges data of external bus and bus on chip, and provides and reply.When non-data processing method when prepass is write operation, two passages are all write; During read operation,,,, read and deposit the data that receive FIFO earlier in according to the flag information that the switching controls module provides if read to receive FIFO if read register is read the register when prepass.
The switching controls module comprises three registers, switch control logic, the steering logic of information counter.Three registers are the switch mode register, switching state register, the reception FIFO information counter of node.The switch mode register is used for being provided with the mode of operation of node and the switching rank of each passage; Mode of operation comprises redundant mode and non-redundant mode; According to the requirement of system to reliability, can be provided with four and switch rank, it is high more to switch rank, and reliability is high more, and the fault tolerant degree is low more.The switching state register is a read-only register; Its value shows that this node is sending node or receiving node, and which passage is sending or receiving, and sends the status information whether switching took place in the receiving course; Read this register, but the switching mark in the clear to send receiving course.The reception FIFO information counter of node is used for depositing available information sum among the reception FIFO of two controllers.Under redundant mode, when switch control logic satisfies at switching condition, produce handoff, provide switching state, after prepass is retransmitted twice, switch.If retransmit successfully, the prepass of working as after the switching is no longer retransmitted present frame; If retransmit unsuccessfully, work as prepass, repeating transmission present frame after the switching; Switching under the minimum situation of rank, double transmission less than five frame data of controller just switch, and can produce handover blocking, can not switch behind the obstruction, after bus is closed and recovered, under the situation that switching condition satisfies, just can switch once more.Under non-redundant mode, switching condition is satisfied not to switch yet, and is equivalent to single pass CAN bus controller this moment.The steering logic of information counter according to the data that each passage receives or discharges, is carried out the change of count value to it, and the reception FIFO that deposits which passage in is provided mark.
The CAN passage is mainly accomplished the function of CAN communications protocol, two kinds of mode of operations, basic model and mode of extensions.Form by 12 modules, comprising: register module, bit timing logic module, status control module, sending module; Receiver module, CRC sequence generation module, position packing module, fault management modules; The interrupt management module receives fifo module, and synchronization module is checked and accepted filtration module.Register module is one group of register, is used for the communication data of store configuration information and CAN bus.Through the configuration related register, can realize to the bus controller mode of operation timing information, the configuration of transmission data etc.; Read related register and can obtain the bus controller current working state, information such as interruption situation and mistake.The bit timing logic module realizes CAN controller bit timing and synchronizing function.The status control module specified data is in which field of Frame or remote frame in transmission or receiving course.Sending module is accomplished and is sent Frame, remote frame, erroneous frame or overload frame, and the level value that sends the certain bits of agreement regulation.The function that RL is accomplished is to tear the frame that receives open frame, checks and accepts filtering, deposits data in reception buffer then.CRC sequence generation module produces the CRC check sequence according to the data of sending or receiving.The position packing module during transmission, adds filler according to the coding rule of CAN agreement; During reception, remove the function of filler.Fault management modules is accomplished error-detecting and the wrong function that defines, and comprises and detects five kinds of different type of errors, and change the value of error counter, provides the state of bus.The interrupt management module interrupts handling to the difference under the different working modes, and provides look-at-me and interrupt clear.Receive fifo module and have 64 bytes, be used for depositing the data that receive,, correctly deposit sense data in according to read-write control signal.Synchronization module carries out synchronous processing to the level value that receives.Check and accept filtration module and accomplish the function of checking and accepting filtering, can realize standard frame, single filter function of expansion frame and two filter functions.
The invention has the beneficial effects as follows:
(1) the pure hardware that switches among the present invention switches, and switching efficiency is high, and nanosecond is accomplished and switched
(2) each CAN passage has 4 switching ranks to be provided with among the present invention, can satisfy the requirement to different reliabilities.
(3) the present invention can be operated under redundant mode and the non-redundant mode, and applied range can satisfy the demands of different to system
(4) the non-prepass of working as of the present invention reduces the software burden to user transparent, and is simple to operation.
Description of drawings:
Fig. 1 is a CAN controller architecture block diagram of the present invention.
Fig. 2 is the CAN modular structure block diagram in the CAN controller.
Embodiment:
Below in conjunction with accompanying drawing the present invention is done detailed description.
Controller architecture is as shown in Figure 1.1 is bus interface module; 2 is passage switching controls module, and 3 is a CAN bus controller module, and 4 is the 2nd CAN bus controller module; 5 is the address data signal line of wishbone bus; 6 is the interface control signal line of wishbone bus, and 7 is the inner address data signal line of controller, and 8 is inner control signal wire; 9 is the interface signal line of a CAN bus controller module and external transceiver, and 10 is the interface signal line of the 2nd CAN bus controller module and external transceiver.
Controller is through the address data signal line 5 of wishbone bus, and the interface control signal line 6 and the outside wishbone main equipment of wishbone bus carry out communication; Bus interface module 1; Passage switching controls module 2; The one CAN bus controller module 3, the two CAN bus controller modules 4 are through the inner address data signal line 7 of controller, and inner control signal wire 8 is accomplished the transmission of address date and internal control signal; The state that passage switching controls module 2 is confirmed two passages through the control that receives and data-signal; Whether switch, and the control of information counter, and these signals are passed to bus interface module 1; The one CAN bus controller module 3, the two CAN bus controller modules 4; The one CAN bus controller module 3, the two CAN bus controller modules 4 are confirmed working condition separately through the passage that receives and switching state information, control information, data message etc.; Interface signal line 9, the two CAN bus controller modules of the one CAN bus controller module and external transceiver are connected with external transceiver respectively with the interface signal line 10 of external transceiver.
The structure of the one CAN bus controller module 3 and the 2nd CAN bus controller module 4 is as shown in Figure 2, and 11 is register module, and 12 for checking and accepting filtration module; 13 is the reception FIFO of 64 bytes, and 14 is status control module, and 15 is CRC sequence generation module; 16 is receiver module, and 17 is the position packing module, and 18 is fault management modules; 19 is sending module, and 20 is the bit timing logic module, and 21 is the interrupt management module; 22 is synchronization module, and 23 is the address data signal line between CAN bus controller module and the interface logic module, and 24 is the control signal wire between CAN bus controller module and the interface logic module; 25 is two signal wires between the CAN module, and 26 is the reception signal wire of CAN bus controller module, and 27 is the transmission signal wire of CAN bus controller module.
For transmission, bit timing logic module 20 is provided with the specified data communication baud rate according to register module 11, and confirms to send the position of point, passes to sending module 19; The pattern that sending module 19 provides according to register module 11 and signal wire 24; State, information such as switching and control determine whether to send data; And the data framing that sends of the needs that register module 11 is provided; Confirmed to add by position packing module 17 then and fill bit positions, sending module 19 adds fillers, through signal wire 27 data is sent; After sending completion, look-at-me is passed to interrupt management module 21; If in the process of transmitting, make a mistake, type of error is passed to fault management modules 18, and sending module 19 begins to send erroneous frame; Fault management modules 18 is confirmed bus state, and status information is passed to status control module 14 that according to the value of type of error change error counter count value sends out through signal wire 25.
For reception, bit timing logic module 20 is provided with the specified data communication baud rate and the position of definite sampled point according to register module 11; Synchronization module 22 is passed to bit timing logic module 20 after carrying out the data of signal wire 26 synchronously; Bit timing logic module 20 is passed to receiver module 16 according to sampling pattern and sampled point with sampled value; The state that receiver module 16 provides according to status control module 14 reaches the needs removal filling bit position that position packing module 17 is given away, removes filler, and tears frame open; Id information is passed to examination filtration module 12; Check and accept filtration module 12 according to the pattern of the examination filtering of register module 11 settings and the value of wave filter; Determine whether the data that receive are deposited in the reception FIFO 13 of 64 bytes, and comparative result is passed to receiver module 16; Receiver module 16 writes effective information according to comparative result the reception FIFO 13 of 64 bytes; Receiver module 16 will be removed the data of filler and give CRC sequence generation module 15 in reception; CRC sequence generation module 15 is passed to receiver module 16 with result of calculation; Receiver module 16 receives and finishes, and gives interrupt management module 21 with interrupting information; Occur mistake in the reception, type of error is passed to fault management modules 18,18 pairs of mistakes of fault management modules are handled, and simultaneously, sending module 19 sends erroneous frame.At last, register module 11 is with state, and interrupting information is passed to interface; The reception FIFO 13 of 64 bytes passes to interface with data.
According to such scheme, with Verilog HDL language the logical design of controller is described, and completion logic is comprehensive and placement-and-routing; Simultaneously, design a CPCI witness plate, design of Controller is mapped in the PLD realizes, and the function of controller is tested.Test result shows that the present invention has good exploitativeness, and performance satisfies expection.
Claims (7)
1. the double-redundancy CAN controller of a direct-cut operation is characterized in that: comprise bus interface module, switching controls module, a CAN bus controller module, the 2nd CAN bus controller module;
Bus interface module is used for the exchanges data of external bus and bus on chip, and provides and reply; Passage switching controls module is confirmed the state of a CAN bus controller module, the 2nd CAN bus controller module from two CAN bus controller modules reception controls and data-signal; Judge whether to switch; And said control and data-signal passed to bus interface module; The one CAN bus controller module, the 2nd CAN bus controller module.
2. controller according to claim 1 is characterized in that: when bus interface module is write operation in the data processing method of non-current C AN passage, two passages are all write; During read operation,,,, read and deposit the data that receive FIFO earlier in according to the flag information that the switching controls module provides if read to receive FIFO if read register is read the register when prepass.
3. controller according to claim 1 and 2 is characterized in that: the switching controls module comprises three registers: switch mode register, switching state register, the reception FIFO information counter of node; The switch mode register is provided with the mode of operation of node and the switching rank of each passage; The switching state register is a read-only register; Its value shows that this node is sending node or receiving node, and which passage is sending or receiving, and sends the status information whether switching took place in the receiving course; Read this register, but the switching mark in the clear to send receiving course; The reception FIFO information counter of node is used for depositing available information sum among the reception FIFO of two CAN bus controller modules; According to the data that each passage receives or discharges, it is carried out the change of count value, and the reception FIFO that deposits which passage in is provided mark.
4. controller according to claim 3 is characterized in that: under redundant mode, when switch control logic when switching condition satisfies, produce handoff, the switching controls module provides switching state, current C AN passage switches after retransmitting twice; If retransmit successfully, the current C AN passage after the switching is no longer retransmitted present frame; Get nowhere if retransmit, the current C AN passage after the switching is retransmitted present frame; Switching under the minimum situation of rank, switching during double transmission less than five frame data of controller, producing handover blocking, can not switch behind the obstruction, after bus is closed and recovered, under the situation that switching condition satisfies, switching once more; Under non-redundant mode, switching condition is satisfied not to switch yet, and is equivalent to single pass CAN bus controller this moment.
5. controller according to claim 3 is characterized in that: said mode of operation comprises redundant mode and non-redundant mode.
6. controller according to claim 1 and 2 is characterized in that: said bus interface module is the Wishbone EBI.
7. controller according to claim 1 and 2 is characterized in that, a said CAN bus controller module, the 2nd CAN bus controller module include: register module, bit timing logic module; Status control module, sending module, receiver module, CRC sequence generation module; The position packing module, fault management modules, interrupt management module; Receive fifo module, synchronization module is checked and accepted filtration module;
For transmission, the bit timing logic module is provided with the specified data communication baud rate according to register module, and confirms to send the position of point, passes to sending module; The data framing of the needs transmission that the sending module register module provides is confirmed to add the filling bit position by the position packing module and is added filler, and data send, and transmission is passed to the interrupt management module with look-at-me after accomplishing; If make a mistake in the process of transmitting, type of error is passed to fault management modules, and sending module begins to send erroneous frame; Fault management modules is confirmed bus state, and status information is passed to status control module according to the value of type of error change error counter;
For reception, the bit timing logic module is provided with the specified data communication baud rate and the position of definite sampled point according to register module; Synchronization module is passed to the bit timing logic module after carrying out the data that receive synchronously; The bit timing logic module is passed to receiver module according to sampling pattern and sampled point with sampled value; The state that receiver module provides according to status control module reaches the needs removal filling bit position that the position packing module is given away, removes filler, and tears frame open; Id information is passed to the examination filtration module, check and accept filtration module, determine whether the data that receive are deposited in the reception FIFO of 64 bytes, and comparative result is passed to receiver module according to the pattern of the examination filtering of register module setting and the value of wave filter; Receiver module writes effective information according to comparative result the reception FIFO of 64 bytes; Receiver module will be removed the data of filler and give CRC sequence generation module in reception; CRC sequence generation module is passed to receiver module with result of calculation; Receiver module receives and finishes, and gives the interrupt management module with interrupting information; Occur mistake in the reception, type of error is passed to fault management modules, fault management modules is handled mistake, and simultaneously, sending module sends erroneous frame; At last, register module is passed to interface with state, interrupting information; The reception FIFO of 64 bytes passes to interface with data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210186270.7A CN102759891B (en) | 2012-06-07 | 2012-06-07 | Hard handover dual-redundancy CAN controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210186270.7A CN102759891B (en) | 2012-06-07 | 2012-06-07 | Hard handover dual-redundancy CAN controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102759891A true CN102759891A (en) | 2012-10-31 |
| CN102759891B CN102759891B (en) | 2014-07-16 |
Family
ID=47054375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210186270.7A Active CN102759891B (en) | 2012-06-07 | 2012-06-07 | Hard handover dual-redundancy CAN controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102759891B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103024088A (en) * | 2012-12-19 | 2013-04-03 | 深圳市广和通实业发展有限公司 | Method for simultaneous communication of double serial ports |
| CN103472446A (en) * | 2013-09-09 | 2013-12-25 | 成都市未来合力科技有限责任公司 | Channel intelligent switching control management method of secondary surveillance radar test responder |
| CN103838189A (en) * | 2012-11-20 | 2014-06-04 | 北汽福田汽车股份有限公司 | CAN communication monitoring protection device and vehicle |
| CN104618208A (en) * | 2015-01-26 | 2015-05-13 | 国电南瑞科技股份有限公司 | Elastic data interaction comprehensive bus system |
| CN105159224A (en) * | 2015-07-27 | 2015-12-16 | 深圳市合信自动化技术有限公司 | Interruption source rapid query method and system |
| CN105593822A (en) * | 2013-09-30 | 2016-05-18 | 慧与发展有限责任合伙企业 | Interpreting signals received from redundant buses |
| CN111614532A (en) * | 2020-05-13 | 2020-09-01 | 湖北三江航天万峰科技发展有限公司 | CAN redundant communication system based on DSP |
| CN112859711A (en) * | 2021-02-07 | 2021-05-28 | 航天科工空间工程发展有限公司 | Spacecraft CAN bus autonomous switching processing system and method |
| CN113885391A (en) * | 2021-10-18 | 2022-01-04 | 西安微电子技术研究所 | Dual-redundancy steering engine switching instruction interface circuit and instruction switching method |
| CN114073042A (en) * | 2019-05-16 | 2022-02-18 | 罗伯特·博世有限公司 | Transmitting/receiving device and communication control device for a subscriber station of a serial bus system and method for communication in a serial bus system |
| CN115065575A (en) * | 2022-07-26 | 2022-09-16 | 广州智慧城市发展研究院 | Data transmission system based on CAN bus controller and electronic equipment |
| CN115484120A (en) * | 2021-06-15 | 2022-12-16 | 中国科学院沈阳自动化研究所 | Redundant field bus communication controller and implementation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006260393A (en) * | 2005-03-18 | 2006-09-28 | Nec Saitama Ltd | Cpu system |
| CN101286940A (en) * | 2008-05-12 | 2008-10-15 | 北京邮电大学 | Dual-redundant CAN bus communication system and communicating method thereof |
| CN101631057A (en) * | 2009-08-17 | 2010-01-20 | 北京航空航天大学 | Network control method of dual-redundancy CAN bus |
-
2012
- 2012-06-07 CN CN201210186270.7A patent/CN102759891B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006260393A (en) * | 2005-03-18 | 2006-09-28 | Nec Saitama Ltd | Cpu system |
| CN101286940A (en) * | 2008-05-12 | 2008-10-15 | 北京邮电大学 | Dual-redundant CAN bus communication system and communicating method thereof |
| CN101631057A (en) * | 2009-08-17 | 2010-01-20 | 北京航空航天大学 | Network control method of dual-redundancy CAN bus |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103838189A (en) * | 2012-11-20 | 2014-06-04 | 北汽福田汽车股份有限公司 | CAN communication monitoring protection device and vehicle |
| CN103838189B (en) * | 2012-11-20 | 2016-05-04 | 北汽福田汽车股份有限公司 | CAN communication monitoring protector and vehicle |
| CN103024088B (en) * | 2012-12-19 | 2015-04-22 | 深圳市广和通实业发展有限公司 | Method for simultaneous communication of double serial ports |
| CN103024088A (en) * | 2012-12-19 | 2013-04-03 | 深圳市广和通实业发展有限公司 | Method for simultaneous communication of double serial ports |
| CN103472446A (en) * | 2013-09-09 | 2013-12-25 | 成都市未来合力科技有限责任公司 | Channel intelligent switching control management method of secondary surveillance radar test responder |
| CN105593822A (en) * | 2013-09-30 | 2016-05-18 | 慧与发展有限责任合伙企业 | Interpreting signals received from redundant buses |
| CN104618208A (en) * | 2015-01-26 | 2015-05-13 | 国电南瑞科技股份有限公司 | Elastic data interaction comprehensive bus system |
| CN105159224A (en) * | 2015-07-27 | 2015-12-16 | 深圳市合信自动化技术有限公司 | Interruption source rapid query method and system |
| CN105159224B (en) * | 2015-07-27 | 2018-04-03 | 深圳市合信自动化技术有限公司 | A kind of interrupt source method for quickly querying and system |
| US11632265B2 (en) | 2019-05-16 | 2023-04-18 | Robert Bosch Gmbh | Transceiver unit and communication control unit for a user station of a serial bus system and method for communication in a serial bus system |
| CN114073042B (en) * | 2019-05-16 | 2023-05-09 | 罗伯特·博世有限公司 | Transmitting/receiving device and communication control device for subscriber station of serial bus system and method for communication in serial bus system |
| CN114073042A (en) * | 2019-05-16 | 2022-02-18 | 罗伯特·博世有限公司 | Transmitting/receiving device and communication control device for a subscriber station of a serial bus system and method for communication in a serial bus system |
| CN111614532A (en) * | 2020-05-13 | 2020-09-01 | 湖北三江航天万峰科技发展有限公司 | CAN redundant communication system based on DSP |
| CN112859711A (en) * | 2021-02-07 | 2021-05-28 | 航天科工空间工程发展有限公司 | Spacecraft CAN bus autonomous switching processing system and method |
| CN112859711B (en) * | 2021-02-07 | 2022-07-12 | 航天科工空间工程发展有限公司 | Spacecraft CAN bus autonomous switching processing system and method |
| CN115484120A (en) * | 2021-06-15 | 2022-12-16 | 中国科学院沈阳自动化研究所 | Redundant field bus communication controller and implementation method thereof |
| CN115484120B (en) * | 2021-06-15 | 2023-10-20 | 中国科学院沈阳自动化研究所 | Redundant field bus communication controller and implementation method thereof |
| CN113885391A (en) * | 2021-10-18 | 2022-01-04 | 西安微电子技术研究所 | Dual-redundancy steering engine switching instruction interface circuit and instruction switching method |
| CN113885391B (en) * | 2021-10-18 | 2023-05-16 | 西安微电子技术研究所 | Dual-redundancy steering engine switching instruction interface circuit and instruction switching method |
| CN115065575A (en) * | 2022-07-26 | 2022-09-16 | 广州智慧城市发展研究院 | Data transmission system based on CAN bus controller and electronic equipment |
| CN115065575B (en) * | 2022-07-26 | 2022-11-29 | 广州智慧城市发展研究院 | Data transmission system based on CAN bus controller and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102759891B (en) | 2014-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102759891B (en) | Hard handover dual-redundancy CAN controller | |
| US9356830B2 (en) | Communication device for a redundantly operable industrial communication network and method for operating the communication device | |
| EP2634974B1 (en) | Channel interleaved multiplexed databus | |
| CN102932489B (en) | Multi-channel ARINC429 bus interface | |
| US20080205416A1 (en) | Flight control computers with ethernet based cross channel data links | |
| US7944818B2 (en) | High-availability communication system | |
| CN102055633B (en) | Satellite-borne double-CAN (Controller Area Network) bus node failure self-restoration system | |
| CN102984059B (en) | Gigabit Ethernet redundancy network interface card and link switching condition criterion output control method thereof | |
| CN108259127B (en) | PCIE dual-redundancy ten-gigabit network IP core | |
| US6425009B1 (en) | Monitoring redundant control buses to provide a high availability local area network for a telecommunications device | |
| CN101848154B (en) | System based on advanced telecom computation architecture | |
| CN103051414A (en) | Serial communication error correction method and system | |
| CN101753284A (en) | 10/100M Ethernet double interface switching method based upon carrier detect and device thereof | |
| CN109542823A (en) | A kind of trigger-type dual redundant network and its application method | |
| CN103729333A (en) | Backplane bus structure sharing multiple channel time slots and implementation method thereof | |
| CN105071904A (en) | Communication interface and protocol | |
| WO2013079000A1 (en) | Train ring networking method | |
| CN103235767B (en) | A kind of principal and subordinate MII management interface serial communication method | |
| CN201766606U (en) | Network switching device based on physical layer state detection and fault screening strategy | |
| CN101009542B (en) | Extension device of data network node device port | |
| CN101304296B (en) | Network apparatus and transmission method thereof | |
| CN114884767B (en) | Synchronous dual-redundancy CAN bus communication system, method, equipment and medium | |
| CN105656773A (en) | High-reliability link failure tolerance module and method aiming at transient failures and intermittent failures in network-on-chip | |
| CN114928513A (en) | Double-bus communication system and communication method based on SRIO protocol | |
| US11863468B2 (en) | Control of ethernet link-partner GPIO using OAM |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |