CN100459547C - Communication system and method between serial boards - Google Patents
Communication system and method between serial boards Download PDFInfo
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- CN100459547C CN100459547C CNB2006100620531A CN200610062053A CN100459547C CN 100459547 C CN100459547 C CN 100459547C CN B2006100620531 A CNB2006100620531 A CN B2006100620531A CN 200610062053 A CN200610062053 A CN 200610062053A CN 100459547 C CN100459547 C CN 100459547C
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Abstract
The invention relates to a serial inter-board communication system, which comprises: a main controller and a service unit, wherein said main controller comprises at least one independent band-external manage channel MHW; each MHW is connected to at least one service unit. The invention also provides a serial inter-board communication method. The invention uses independent MHW with several service units, to support mixed transmission hardware state and manage report, with less signal needed by back board; and the cost of each module is lower, the transmission speed can meet band-external manage demand, and it separates the band-internal and band-external managements to improve the safety of system.
Description
Technical field
The present invention relates to the communications field, especially relate to a kind of serial inter-board communication system and method.
Background technology
Communicate by letter between each veneer in the equipment frame and can be divided into in-band communications and 2 kinds of modes of out-of-band communication, in-band communications since need with the Business Stream multiplex channel, this just causes main control unit/business unit CPU vulnerable, comprise the attack of ADSL side and network side, attack can cause that in-band communications are disconnected, the serious problems of waiting indefinitely are dashed in board resetting, main control unit CPU.When service traffics are big, the congestion packet loss phenomenon often appears, and need comparatively complicated scheduling and processed to the extraction of out-of-band communication message.
Out-of-band communication more often uses serial ports and FE passage.Please refer to shown in Figure 1ly, be with the speed of outer serial ports itself lower, using mainly is bus form, and multi-load has limited the further lifting of traffic rate, and total speed can only maintain below the 1Mbps.The shortcoming of this scheme is that the multi-load of bus form has caused speed to promote difficulty; Bandwidth is very limited; A business board interface damages and may cause whole frame veneer band outer tunnel to be hung extremely.
Please refer to shown in Figure 2, be with outer network interface to adopt the point-to-point star structure, need a core LSW to realize the communication of each veneer, can support intercommunication between each veneer, under the situation that continues to promote in veneer density, need to consume a large amount of ports of core LSW, some business unit reality does not need so big bandwidth, but need monopolize the LSW port, cause cost to increase; The star cabling of backboard may further increase the backboard cost simultaneously.
Business unit need be to main control unit uploaded state information simultaneously, and main control unit need send control information under business unit.Way in the past all is to adopt independently star control signal, has taken more backboard cabling resource.Promptly increase the backboard number of plies, taken valuable back panel connector pin simultaneously.Based on above various reasons, the requirement for novel out-of-band communication bus has been proposed:
(1) principal and subordinate's bus adopts the star-like mode of class, prevents that the damage of a business board from causing the whole piece bus to interrupt;
(2) traffic rate between riser requires every business unit can exclusively enjoy more than the 2Mbps;
(3) share the formula bus, when certain piece business board did not carry out out-of-band communication, its bandwidth can be taken by other veneers;
(4) reduce backboard cabling quantity, will send state control signal to be integrated into out of band communication channel mutually;
(5) lower realization cost.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiency that above-mentioned prior art exists, a kind of serial inter-board communication system and method are provided, but the outer communication interface speed of elevator belt reduces the backboard cabling as far as possible, supports that multiplexing bandwidth does not also have big impact to operation flow simultaneously between each veneer.
For solving the problems of the technologies described above, the invention provides a kind of serial inter-board communication system, comprise main control unit and business unit, described main control unit comprises at least one outband management passage independently, described outband management passage is multiplex bus MHW, and each MHW connects at least two business unit.
Further, described main control unit is as host node, and described business unit is as partial node.
Further, described MHW adopts universal serial bus to realize, described universal serial bus comprises four road signals, is respectively: MHW clock signal C lock, slot synchronization signal TimeSlot_syn, main control unit output signal MHW_TX and main control unit input signal MHW_RX.
Further, described main control unit and business unit include the MHW module that is used to realize the administrative message abstraction function, adopt Clock as timer clock, adopt TimeSlot_syn as the slot synchronization signal.
Further, described main control unit issues administrative message to described business unit by the MHW_TX signal.
Further, described business unit is subjected to main control unit control by sending administrative message to described main control unit on the MHW_RX signal.
Further, described main control unit and business unit comprise respectively that also being used for the state that the hardware state between main control unit and the business unit send mutually send module mutually, uses the time slot of regular length to communicate.
Further, when described main control unit issued hardware state, the state of described main control unit sent module to export high resistant after all business unit hardware management information of extension mutually under sending it, and time slot is taken by the administrative message of described main control unit subsequently; When sending hardware state on business unit, each business unit is exported high resistant according to the difference of slot number behind fixing its time slot of transmission, after all business unit transmission are finished, uses remaining time slots by administrative message.
The present invention also provides a kind of serial inter-board communication, may further comprise the steps:
A. each band of main control unit is managed passage outward and is connected a plurality of business unit, and described outband management passage is multiplex bus MHW; And
B. described main control unit as host node by MHW with communicate as each business unit of partial node.
Further, issue administrative message when the described business unit when described main control unit among the described step b, described each business unit receives simultaneously, extract the fixing distinguishing mark in heading and this unit relatively, judge whether to belong to the administrative message of this unit, handle if then deliver business unit CPU, if not then abandoning.
Further, among the described step b when described business unit send administrative message on main control unit, described business unit obtains taking on the bus after main control unit is permitted and send, main control unit judges whether it is to send on the correct business unit according to the different message distinguishing mark of receiving management message, is handled simultaneously.
Further, in a MHW, synchronization only allows to send administrative message on the business unit.
Further, described business unit independently is provided with different heading distinguishing marks, and described distinguishing mark comprises MAC Address or ATM cell head.
Further, when described main control unit issued hardware state, described main control unit was exported high resistant hang all business unit hardware management information under sending it after among the described step b, and time slot is taken by the administrative message of described main control unit subsequently.
Further, when sending hardware state among the described step b on business unit, each business unit is exported high resistant according to the difference of slot number behind fixing its time slot of transmission, after all business unit transmission are finished, uses remaining time slots by administrative message.
The present invention has following useful effect: the present invention adopts independently and hangs a plurality of business unit under the MHW, support mixed transport hardware state and administrative message, the backboard desired signal is less, the realization cost of each module is lower, transmission rate can satisfy the outband management requirement, simultaneously will be with interior and the independent fail safe that improves system management of outband management.
Description of drawings
Fig. 1 is existing band guest performer port system structural representation.
Fig. 2 is existing band outer net port system structural representation.
Fig. 3 is a serial inter-board communication system structural representation of the present invention.
Fig. 4 is that outband management passage MHW universal serial bus of the present invention is realized schematic diagram.
Fig. 5 is that the present invention realizes the structural representation that main control unit and business unit state send mutually.
Fig. 6 is that outband management passage MHW state of the present invention send and MHW module reuse realization schematic diagram mutually.
Fig. 7 is that outband management passage MHW state of the present invention send and another realization schematic diagram of MHW module reuse mutually.
Embodiment
Describe the present invention below in conjunction with accompanying drawing.
Describe for convenient, novel outband management passage of the present invention is MHW (Multiple Highway, a multiplex bus).The employing master-slave mode realizes.
As shown in Figure 3: the inner realization at least one of main control unit is the MHW out-band channel independently, every business unit of hanging fixed qty down, and each MHW link is separate, realizes the relatively independent management of whole frame veneer.When a business unit damages, only can cause adjacent direct-connected several business board chain ruptures, but can not influence the veneer of all groove positions.
MHW adopts master-slave mode to realize.Main control unit is all the time as host node, and each business unit conduct is from node.
Main control unit can directly issue by the MHW link when issuing administrative message, and every MHW can independently issue different administrative messages.Each business unit receives simultaneously, extracts the fixing distinguishing mark of heading and this plate relatively, judges whether to belong to the administrative message of this plate, handles if then deliver business unit CPU, if not then abandoning.
Business unit is last when sending the main control unit administrative message, must be controlled by main control unit, only obtain can taking on the bus after the main control unit permission and send, main control unit judges whether it is to send on the correct business unit according to the different message distinguishing mark of receiving management message, is handled simultaneously.Attention: in 1 MHW, synchronization can only allow to send administrative message on the business unit, prevents to cause bus collision.
Main control unit and business unit include the MHW module, are used to realize MHW functions such as protocol conversion, administrative message extraction.For protocol conversion, be meant that promptly the content (for example administrative message) that the MHW module of main control unit and business unit will need to send separately converts the physical communication agreement to, transmits by MHW.Message extract the MHW module promptly be meant main control unit and business unit can be from the content of reception the extract management message, for example the MHW module of business unit can be from the content that main control unit issues the extract management message.
In addition, each business board needs independently be provided with different heading distinguishing mark (first-class as MAC Address, ATM cell).
The MHW bus frequency is limited by the switching rate of transceiving device only in theory.
Please refer to shown in Figure 4ly, MHW adopts universal serial bus to realize, at least 4 signals of MHW bus requirements can expand to the transmission of low level difference as required, to promote speed:
The Clock:MHW clock signal, the transmitting-receiving homology can directly be used system's arrowband 8M clock;
TimeSlot_syn: slot synchronization signal, the transmitting-receiving of business unit are unit with the frame, and the ternary Synchronization Control when share as a plurality of veneers of every road MHW must be synchronous fully with business clock;
MHW_RX: main control unit input data, send main control unit on each business unit is multiplexing
MHW_TX: the main control unit dateout, each business unit receives
The MHW module of main control unit and business unit must be unified to adopt Clock as timer clock, must strictly adopt TimeSlot_syn as the slot synchronization signal; MHW_TX is the serial data bus that main control unit is issued to each business unit; Main control unit can issue at any time, and business unit receives; MHW_RX is the serial data bus that business unit sends to main control unit, the indication that must abide by main control unit could send (the business unit transmission indication that main control unit issues, can in MHW_TX, take independently BIT position indication, also can adopt the special-purpose following administrative message informing business plate that send), and the transmission of each business unit must be benchmark with TimeSlot_syn, prevents bus collision.
The structure of MHW is according to 3 layers of design, and MHW module physical layer must be supported to send ternary, prevents to send conflict, adopts the synchronization slot mode simultaneously, uses unified system clock and synchronizing frame head, and transmission means is the serial synchronous transmission.
The consecutive frame structure is according to 2 layers of design: main control unit and business unit adopt synchronous serial protocol in the physical layer transmission of backboard: be such as but not limited to HDLC agreement or SPI agreement, the frame length variable length, but must be the initial transmission of benchmark with TimeSlot_syn, requirement can correctly be carried out frame alignment and message content and extract; Administrative message between the inner loading plate of serial protocol, form can be Ethernet message or ATM message etc., each business unit can be independently discerned in requirement.
Please refer to shown in Figure 5ly, MHW not only can be used for administrative message transmitting-receiving, and can realize that the hardware state between main control unit and the business unit send mutually.By MHW bus and time-sharing multiplex principle, the two can perfectly combine: business unit or main control unit utilize TimeSlot_syn as benchmark, the time slot of definition regular length send use mutually as hardware state, remaining time slots is used by the MHW module of each unit, because state send module only to take the regular length time slot mutually, so the MHW module still can be unified transmitting-receiving and not cause conflict.The hardware schematic diagram is as follows: in business unit or the main control unit, except the MHW module, also have state to send module mutually.The both must support to send ternary.
Different with the MHW module, hardware send mutually according to TimeSlot_syn and indicates, and every veneer fixedly takies time slot according to the slot number difference, and every MHW hangs several veneers down and just need take several fixedly time slots like this.As the administrative message transmission means, when main control unit issued state, the block of state of main control unit must be exported high resistant hang all veneer control informations under sending after, and time slot is taken by the administrative message module of main control unit subsequently; When sending state on business unit, each service board is exported high resistant according to the difference of slot number behind the own time slot of fixing transmission, after all veneers transmission are finished, is administered the use of remaining time slots by the administrative message module.If the single plate hardware state is more, can consider to use the multi-frame mode.Administrative message takies remaining slot transmission.
Be exemplified below: please refer to shown in Fig. 6-7, hanging 4 business unit under the cover MHW bus is example, and business unit need realize that hardware state send mutually.Main control unit need send hardware management information down; Business unit need report main control unit hardware management information.Do not need multi-frame in this case, take TimeSlot_syn 4 time slots afterwards, remaining time slots is used for the administrative message transmission.Actual being achieved as follows:
Hardware send with the brief introduction of MHW out-band channel as follows mutually:
Frame synchronizing signal is issued by systematic unity;
Partial fixing time slot after the frame synchronization is that hardware state send reserved area mutually, according to different each business unit dispensings of slot number time slot independently;
The serial data of business unit and main control unit output only drove for 3/4 cycle, according to plate number selection time slot;
Hardware send state if desired mutually, adopts the support of multi-frame form;
The function that main control unit need be realized comprises:
Data Receiving and frame are delimited;
Veneer MHW has or not or on-site judgment;
The frame data buffer memory;
CPU communicates by letter with main control unit;
Report message according to the fair poll of port queue;
Business unit is realized:
Realize the slot synchronization control that a plurality of business unit are public based on TimeSlot_syn; Each business unit is according to the time slot of the plate number decision oneself of CPU configuration; TimeSlot_syn must be the 2n power homology frequency division of Clock;
MHW_RX output was ternary when business unit powered on; Also be ternary before CPU opens switch, open the MHW output enable again after the information of first configured slot position;
Send Flag information when idle.
The present invention adopts independently, and MHW hangs a plurality of business unit down, support mixed transport hardware state and administrative message, the backboard desired signal is less, the realization cost of each module is lower, transmission rate can satisfy the outband management requirement, simultaneously will be with interior and the independent fail safe that improves system management of outband management.
Claims (15)
1, a kind of serial inter-board communication system, comprise main control unit and business unit, it is characterized in that: described main control unit comprises at least one outband management passage independently, and described outband management passage is multiplex bus MHW, and each MHW connects at least two business unit.
2, serial inter-board communication system according to claim 1 is characterized in that: described main control unit is as host node, and described business unit is as partial node.
3, serial inter-board communication system according to claim 1, it is characterized in that: described MHW adopts universal serial bus to realize, described universal serial bus comprises four road signals, is respectively: MHW clock signal C lock, slot synchronization signal TimeSlot_syn, main control unit output signal MHW_TX and main control unit input signal MHW_RX.
4, serial inter-board communication system according to claim 3, it is characterized in that: described main control unit and business unit include the MHW module that is used to realize the administrative message abstraction function, adopt Clock as timer clock, adopt TimeSlot_syn as the slot synchronization signal.
5, serial inter-board communication system according to claim 3 is characterized in that: described main control unit issues administrative message to described business unit by the MHW_TX signal.
6, serial inter-board communication system according to claim 3 is characterized in that: described business unit is subjected to main control unit control by sending administrative message to described main control unit on the MHW_RX signal.
7, serial inter-board communication system according to claim 4, it is characterized in that: described main control unit and business unit comprise respectively that also being used for the state that the hardware state between main control unit and the business unit send mutually send module mutually, uses the time slot of regular length to communicate.
8, serial inter-board communication system according to claim 7, it is characterized in that: when described main control unit issues hardware state, the state of described main control unit send module to export high resistant after all business unit hardware management information of extension mutually under sending it, and time slot is taken by the administrative message of described main control unit subsequently; When sending hardware state on business unit, each business unit is exported high resistant according to the difference of slot number behind fixing its time slot of transmission, after all business unit transmission are finished, uses remaining time slots by administrative message.
9, a kind of serial inter-board communication may further comprise the steps:
A. each band of main control unit is managed passage outward and is connected a plurality of business unit, and described outband management passage is multiplex bus MHW; And
B. described main control unit as host node by MHW with communicate as each business unit of partial node.
10, serial inter-board communication according to claim 9, it is characterized in that: issue administrative message when the described business unit when described main control unit among the described step b, described each business unit receives simultaneously, extract the fixing distinguishing mark in heading and this unit relatively, judge whether to belong to the administrative message of this unit, handle if then deliver business unit CPU, if not then abandoning.
11, serial inter-board communication according to claim 9, it is characterized in that: among the described step b when described business unit send administrative message on main control unit, described business unit obtains taking on the bus after main control unit is permitted and send, main control unit judges whether it is to send on the correct business unit according to the different message distinguishing mark of receiving management message, is handled simultaneously.
12, serial inter-board communication according to claim 11 is characterized in that: in a MHW, synchronization only allows to send administrative message on the business unit.
13, serial inter-board communication according to claim 9 is characterized in that: described business unit independently is provided with different heading distinguishing marks, and described distinguishing mark comprises MAC Address or ATM cell head.
14, serial inter-board communication according to claim 9, it is characterized in that: among the described step b when described main control unit issues hardware state, described main control unit is exported high resistant hang all business unit hardware management information under sending it after, and time slot is taken by the administrative message of described main control unit subsequently.
15, serial inter-board communication according to claim 9, it is characterized in that: when on business unit, sending hardware state among the described step b, each business unit is according to the difference of slot number, export high resistant behind fixing its time slot of transmission, after all business unit transmission are finished, use remaining time slots by administrative message.
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| CNB2006100620531A CN100459547C (en) | 2006-08-09 | 2006-08-09 | Communication system and method between serial boards |
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| CNB2006100620531A CN100459547C (en) | 2006-08-09 | 2006-08-09 | Communication system and method between serial boards |
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| CN1909493A CN1909493A (en) | 2007-02-07 |
| CN100459547C true CN100459547C (en) | 2009-02-04 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101667959B (en) * | 2008-09-05 | 2014-08-20 | 华为技术有限公司 | Method and device for transmitting data in physical layer and data transmission system |
| US8743912B2 (en) * | 2009-12-18 | 2014-06-03 | Nec Corporation | Transmission system, transmitting device, receiving device, transmission method, and computer program |
| CN102647457B (en) * | 2012-03-27 | 2015-04-01 | 瑞斯康达科技发展股份有限公司 | Method, device and system for processing and reporting information |
| CN104333499B (en) * | 2014-10-23 | 2017-09-15 | 南京国电南自软件工程有限公司 | Device backboard high-speed bus link layer communication protocols based on M LVDS |
| CN104993959A (en) * | 2015-06-29 | 2015-10-21 | 山东超越数控电子有限公司 | Method for network communication between management board and business boards |
| CN109522256B (en) * | 2018-12-21 | 2022-10-21 | 联想(北京)有限公司 | Serial port communication method, network equipment, control equipment and storage medium |
| CN109977068B (en) * | 2019-02-01 | 2021-06-08 | 广州广电运通金融电子股份有限公司 | Inter-board communication method and device and circulating machine core |
| CN112422388B (en) * | 2020-11-19 | 2022-06-17 | 深圳市信锐网科技术有限公司 | Communication device, method, system and electronic equipment |
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| EP0394596A1 (en) * | 1989-04-25 | 1990-10-31 | International Business Machines Corporation | Interconnection system for the attachment of user equipments to a communication processing unit |
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| CN1639702A (en) * | 2001-12-19 | 2005-07-13 | 英特尔公司 | Hot plug interface control method and apparatus |
| CN1753376A (en) * | 2005-10-27 | 2006-03-29 | 杭州华为三康技术有限公司 | Biprimary controlled network equipment and its master back-up switching method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0394596A1 (en) * | 1989-04-25 | 1990-10-31 | International Business Machines Corporation | Interconnection system for the attachment of user equipments to a communication processing unit |
| CN1639702A (en) * | 2001-12-19 | 2005-07-13 | 英特尔公司 | Hot plug interface control method and apparatus |
| CN1490978A (en) * | 2003-08-18 | 2004-04-21 | 北京港湾网络有限公司 | Scheme with external channels |
| CN1753376A (en) * | 2005-10-27 | 2006-03-29 | 杭州华为三康技术有限公司 | Biprimary controlled network equipment and its master back-up switching method |
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