CN101184032B - Stacked system equipment communication method - Google Patents
Stacked system equipment communication method Download PDFInfo
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- CN101184032B CN101184032B CN200710166016XA CN200710166016A CN101184032B CN 101184032 B CN101184032 B CN 101184032B CN 200710166016X A CN200710166016X A CN 200710166016XA CN 200710166016 A CN200710166016 A CN 200710166016A CN 101184032 B CN101184032 B CN 101184032B
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Abstract
The invention discloses a high-efficiency communication method of stacking system devices, which saves the CPU and the memory resources. The method uses a two-tuples of a Device ID and a Process ID to uniquely identify one end and distributes the unique Device ID to the members in the system, and distributes the unique Process ID to the process in the device simultaneously; the DATA part of the Ethernet frame is partitioned and a self-defined message format is introduced, meanwhile, the message type is divided into five types. The invention transmits the message by fragmentizing, retransmitting and confirming the data in a link layer, thereby avoids depending on the operating system TCP/IP internet protocol suite and the Socket interface and saves a large quantity of CPU and memory resources, meanwhile, the invention is independent of specific link medium, and reduces the dependence on a hardware. The invention also comprises a signal channel releasing and rebuilding step, wherein, the releasing step comprises normal release and abnormal release.
Description
Technical field:
The invention belongs to Ethernet and pile up technical field, be specifically related to a kind of method of stacked system equipment communication.
Background technology:
When the switch ports themselves lazy weight when satisfying the network application demand, under the situation that is not changing legacy network planning topology, increase the port number of switch, do not increase the burden of webmaster simultaneously again.Breed the exchange piling technology this moment.The technology of piling up is different from the simple cascade of switch, and the equipment of cascade logically is separate, and exchange piling, and from logic, they are equivalent to same equipment.In order to realize the efficient interconnected and unified management of inter-exchange, require to have transmission information between a kind of efficient, process that the reliable news communication mechanism is finished main frame and standby host, main frame and slave.
Message communicating is followed certain hierarchical structure, and the most common level is divided and seen Fig. 1.Wherein, the messages application layer is each functional module of upper strata that needs communication service; The message communicating layer is given full play to the Transmission Control Protocol function, and the concrete practice: the TCP message data is partially submerged into the message that oneself defines, and realizes the application layer forwarding; TCP/IP protocol suite and Socket interface utilize the IP agreement to carry out Route Selection, utilize Transmission Control Protocol to hold-hold control, and the streaming service of not delimiting is provided, and TCP/IP protocol suite and interface are provided by the operating system protocol stack; Ethernet is provided packet receiving, is given out a contract for a project and finish communication on the link level by BSP, driving.
This level is divided in actual applications, there is the protocol stack that too much relies on operating system, the communications protocol complexity, efficient is low, need build TCP and connect, and sets up service end and client, link layer receives that message submits protocol stack, Communication Layer call operation system provides the Socket interface function to obtain message, carries out application layer and transmits, and message is resolved layer by layer and consumed a large amount of CPU and memory source.
Summary of the invention:
In view of this, the object of the present invention is to provide a kind of efficient height, save the stacked system equipment communication method of CPU and memory source.
The communication mechanism that stacked system equipment circulation method of the present invention for this reason adopts comprises:
The data division of ethernet frame is divided into several bytes, determine message format, these bytes comprise start of heading sign Begin-Flag, ENMES sign End-flag, message parameter head MSG-PDU Head and variable length message body MSG-PDUpayload.Wherein, message parameter head MSG-PDU Head comprises event number, receiving equipment number, receiving process number, transmitting apparatus number, sends process number.
This method comprises that channel is set up and the transmission of messages step, wherein in the transmission of messages step when non-local device transmits message, carry out the burst processing by the message Communication Layer according to message-length.
The formula that calculates the burst number is: the burst number=(message-length+MSG_MTU-1)/MSG_MTU, wherein MSG_MTU is the ethernet frame data byte number partly that message transmission unit comprises; And fill MSG-PDU payload structure according to following burst rule:
1), the burst number be 1, the first composed as follows:
Begin-Flag、MSG-PDU?Head、MSG-PDU?payload、End-flag
2), the burst number is 2, each sheet composed as follows:
First: Begin-Flag, MSG-PDU Head, MSG-PDU payload
Second: MSG-PDU payload, End-flag
3), the burst number is 3 or more than 3, each sheet composed as follows:
First: Begin-Flag, MSG-PDU Head, MSG-PDU payload
Intermediate: MSG-PDU Head, MSG-PDU payload
Rear panel: MSG-PDU payload, End-flag.
The communication mechanism that the inventive method adopts also comprises:
Two tuples with device number and process number are come unique identification equipment, and the member in system distributes unique device number DeviceID, simultaneously the unique process number PID of course allocation in equipment;
The byte of ethernet frame data part also comprises message delivery header MsgHead_Snd and protocol data unit head PduHead;
Type of message is divided into five kinds, and promptly connection request NODE_CONNECT, node receive NODE_ACCEPT, turn-off request NODE_CLOSE, send message NODE_MSG and acknowledge message NODE_CONFIRM;
With the state description of message channel is that four kinds of states are promptly from waiting for main attitude, main operating conditions, receiving attitude from operating conditions, wait master.
The inventive method transmission of messages step can also be included in the link that the message Communication Layer retransmits and confirms message.Wherein the implementation method of message re-transmission is: send chained list and introduce head pointer, tail pointer, current pointer, the interval expression of this section sends from the head pointer to the current pointer, the interval expression of this section does not send from the current pointer to the tail pointer, current pointer points to first message to be sent, during transmission, at first will send sign and be changed to 1, if send and successfully point to next message, get nowhere if send, will send sign and be changed to 0, wait for next time sending; The implementation method that message is confirmed is: after receiving terminal is received message, resolve " transmitting Sequence Number " conduct " receive sequence number " among the PduHead, be used for the affirmation to transmitting terminal; If before replying transmitting terminal, receive a plurality of messages of transmitting terminal, then receive that with up-to-date " transmitting Sequence Number " in the transmitting terminal message is " receive sequence number ".
The step of the inventive method can also comprise that channel discharges reconstruction, the method that channel discharges is: main frame section is not at the appointed time received the slave message, main frame is sent out probe messages, requires slave to respond, and removes link if this message slave of sending out number of times certain is not responded; The method that channel discharges can also for: slave is being initiated turn-off request from operating conditions to main frame, and slave enters from waiting for main attitude, and main frame is removed link after receiving turn-off request.
The inventive method is not utilized operating system " TCP/IP protocol suite and Socket interface ", " message Communication Layer " can realize " TCP/IP protocol suite " partial function, realize burst at the message Communication Layer, retransmit, confirm, end-to-end reliable communication, dependence operating system TCP/IP protocol suite and Socket interface have been avoided, the inventive method with message communication layer as separate unit, can add system at any time or from system, peel off, owing to do not adopt ICP/IP protocol, the monitoring client that does not need service end, save a large amount of CPU and memory source, irrelevant with concrete link medium simultaneously, reduced dependence to hardware.
Description of drawings:
Fig. 1 is the message layer hierarchical structure chart of stacked system equipment communication method of the prior art;
Fig. 2 is the message format key diagram of stacked system equipment communication method of the present invention;
Fig. 3 sets up flow chart for the channel of stacked system equipment communication method of the present invention;
Fig. 4 is burst, re-transmission, the affirmation flow chart of stacked system equipment communication method of the present invention.
Embodiment:
The communication mechanism of stacked system equipment communication method of the present invention comprises:
A, in the stacked system equipment communication method of prior art, " TCP/IP protocol suite " is that two tuples with " IP address " and " port numbers " are come unique identification one end, realizes communication end to end.The present invention comes unique identification equipment with two tuples of device number and process number, and realization equipment is interior, the process communication of equipment room.The distribution of device number and process number requires:
Member in a1, the system distributes unique device number DeviceID, arranges certain digitized representation main equipment, arranges certain digitized representation and be equipped with equipment, arrange some digitized representation slave unit, arranges digital decision device intrasystem role.
The unique process number PID of course allocation in the a2, equipment, process one fixes in the process registration table and registered, each equipment has a process registration table, and on each equipment process registration table process number unanimity.
B, the data division of ethernet frame is divided, introduced self-defining message format, the simple protocol message format of message Communication Layer is described and is seen Fig. 2, wherein:
B1, Begin-Flag are the start of heading signs, and End-flag is the ENMES sign, are used to realize burst and group bag;
B2, MSG-PDU Head are the message parameter heads, contain event number, receiving equipment number, receiving process number, transmitting apparatus number, send process number, are used for to the message body brief overview convenient the forwarding; MSG-PDU payload is that variable length message body is contained each field among the MSG-PDU Head, contains the messages application layer simultaneously and imports data division into.
B3, MsgHead_Snd are the message delivery headers, must contain to send sign, idle marker, last message blocks, back one message blocks, and these information are used to the realization that retransmits, confirm.
B4, PduHead are protocol data unit head, must contain active equipment number, destination device number, the sequence number of type of message, transmission and confirmation of receipt sequence number, and these information are used for the message of message channel and transmit.
C, type of message is divided into five kinds is that connection request NODE_CONNECT, node receive NODE_ACCEPT, turn-off request NODE_CLOSE, send message NODE_MSG, acknowledge message NODE_CONFIRM, with the effect of expression message.
The state description of d, message channel is that four kinds of states are promptly from waiting for main attitude, main operating conditions, receiving attitude from operating conditions and wait master, to realize channel foundation, transmission of messages, channel release.
Below in conjunction with Fig. 3 the channel establishment step of the inventive method is elaborated, arranges main frame here as server, slave is all as client.
Below in conjunction with Fig. 4 the transmission of messages step of the inventive method is described in further detail:
1, the burst number be 1, the first composed as follows:
Begin-Flag、MSG-PDU?Head、MSG-PDU?payload、End-flag
2, the burst number is 2, each sheet composed as follows:
First: Begin-Flag, MSG-PDU Head, MSG-PDU payload
Second: MSG-PDU payload, End-flag
3, the burst number is 3 or more than 3, each sheet composed as follows:
First: Begin-Flag, MSG-PDU Head, MSG-PDU payload
Intermediate: MSG-PDU Head, MSG-PDU payload
Rear panel: MSG-PDU payload, End-flag.
Extract event number among the MSG-PDU payload, receiving equipment number, receiving process number, transmitting apparatus number simultaneously, send process number and fill MSG-PDU Head;
Step 404 is with sending sign, idle marker, last message blocks, back one message blocks filling MsgHead_Snd; Fill PduHead with source device number, destination device number, the sequence number, confirmation of receipt sequence number, the type of message that send, what messages the expression source device that wherein transmits Sequence Number sends to destination device, receive sequence number, expression receives what messages of destination device.
Message retransmits to be realized: send chained list and introduce head pointer, tail pointer, current pointer, the interval expression of this section sends from the head pointer to the current pointer, and the interval expression of this section does not send from the current pointer to the tail pointer.Current pointer points to first message to be sent; During transmission, at first will send sign and be changed to 1, successfully point to next message, get nowhere, will send sign and be changed to 0, and wait for next time sending if send if send.
The realization that message is confirmed: after receiving terminal is received message, resolve " transmitting Sequence Number " conduct " receive sequence number " among the PduHead, be used for affirmation to transmitting terminal.If before replying transmitting terminal, receive a plurality of messages of transmitting terminal, then receive that with up-to-date " transmitting Sequence Number " in the transmitting terminal message is " receive sequence number ".
Channel discharges the normal release of branch and two kinds of situations of unusual release.Normal release is that slave is being initiated turn-off request from operating conditions to main frame, and slave enters from waiting for main attitude, and main frame is removed link after receiving turn-off request; Unusual discharge be main frame at the appointed time section do not receive the slave message, main frame is sent out probe messages, requires slave to respond, if this message slave of sending out certain number of times is not responded then removed links.It can be three times that main frame is sent out this probe messages number of times.
Every place that relates to slave can be with standby host as selection scheme in the above technical scheme of the present invention.
The reliable end-to-end means of communication that the present invention proposes in message Communication Layer realization burst, re-transmission, affirmation, finish the function of operating system " TCP/IP protocol suite and the Socket interface " protocol stack of stacked system equipment communication method of the prior art at the message Communication Layer, at the message Communication Layer message is resolved, to the distribution of messages application layer, save precious resources such as CPU, internal memory.
Claims (10)
1. the method for a stacked system equipment communication is characterized in that the communication mechanism that this method adopts comprises:
The data division of ethernet frame is divided into several bytes, and these bytes comprise start of heading sign Begin-Flag, ENMES sign End-flag, message parameter head MSG-PDU Head and variable length message body MSG-PDU payload; Wherein, message parameter head MSG-PDU Head comprises event number, receiving equipment number, receiving process number, transmitting apparatus number, sends process number;
This method comprises that channel is set up and the transmission of messages step, wherein in the transmission of messages step when non-local device transmits message, carry out the burst processing by the message Communication Layer according to message-length.
2. the method for stacked system equipment communication according to claim 1, the formula that it is characterized in that message is carried out calculating when burst is handled the burst number is: the burst number=(message-length+MSG_MTU-1)/MSG_MTU, wherein MSG_MTU is the number of the byte of the described ethernet frame data part that comprises of message transmission unit; And fill MSG-PDU payload structure according to following burst rule:
1), the burst number be 1, the first composed as follows:
Begin-Flag、MSG-PDU?Head、MSG-PDU?payload、End-flag
2), the burst number is 2, each sheet composed as follows:
First: Begin-Flag, MSG-PDU Head, MSG-PDU payload
Second: MSG-PDU payload, End-flag
3), the burst number is 3 or more than 3, each sheet composed as follows:
First: Begin-Flag, MSG-PDU Head, MSG-PDU payload
Intermediate: MSG-PDU Head, MSG-PDU payload
Rear panel: MSG-PDU payload, End-flag.
3. the method for stacked system equipment communication according to claim 1 is characterized in that the communication mechanism that this method adopts also comprises:
Two tuples with device number and process number are come unique identification equipment, and the member in system distributes unique device number DeviceID, simultaneously the unique process number PID of course allocation in equipment;
The byte of the data division of described ethernet frame also comprises message delivery header MsgHead_Snd and protocol data unit head PduHead;
Type of message is divided into five kinds, and promptly connection request NODE_CONNECT, node receive NODE_ACCEPT, turn-off request NODE_CLOSE, send message NODE_MSG and acknowledge message NODE_CONFIRM;
With the state description of message channel is that four kinds of states are promptly from waiting for main attitude, main operating conditions, receiving attitude from operating conditions, wait master.
4. the method for stacked system equipment communication according to claim 1 and 2 is characterized in that the step of described transmission of messages comprises that also message retransmits, message is confirmed.
5. the method for stacked system equipment communication according to claim 4 is characterized in that the step of described transmission of messages comprises that also channel discharges.
6. the method for stacked system equipment communication according to claim 3, the step that it is characterized in that described transmission of messages comprises that also message retransmits, its implementation is: send chained list and introduce head pointer, tail pointer, current pointer, the interval expression of this section sends from the head pointer to the current pointer, the interval expression of this section does not send from the current pointer to the tail pointer, current pointer points to first message to be sent, during transmission, at first will send sign and be changed to 1, if send and successfully point to next message, get nowhere if send, will send sign and be changed to 0, wait for next time sending.
7. according to the method for claim 3 or 6 described stacked system equipment communications, the step that it is characterized in that described transmission of messages also comprises the message affirmation, its implementation is: after receiving terminal is received message, resolve " transmitting Sequence Number " conduct " receive sequence number " among the PduHead, be used for affirmation transmitting terminal; If before replying transmitting terminal, receive a plurality of messages of transmitting terminal, then receive that with up-to-date " transmitting Sequence Number " in the transmitting terminal message is " receive sequence number ".
8. the method for stacked system equipment communication according to claim 7, the step that it is characterized in that described transmission of messages comprises that also channel discharges, the method that channel discharges is: main frame section is not at the appointed time received the slave message, main frame is sent out probe messages, require slave to respond, link if this message slave of sending out certain number of times is not responded then removed.
9. the method for stacked system equipment communication according to claim 8 is characterized in that it is three times that main frame is sent out this probe messages number of times.
10. the method for stacked system equipment communication according to claim 7, the step that it is characterized in that described transmission of messages comprises that also channel discharges, the method that channel discharges is: slave is being initiated turn-off request from operating conditions to main frame, slave enters from waiting for main attitude, and main frame is removed link after receiving turn-off request.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710166016XA CN101184032B (en) | 2007-10-31 | 2007-10-31 | Stacked system equipment communication method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710166016XA CN101184032B (en) | 2007-10-31 | 2007-10-31 | Stacked system equipment communication method |
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| CN101184032A CN101184032A (en) | 2008-05-21 |
| CN101184032B true CN101184032B (en) | 2010-09-08 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102014067B (en) * | 2010-12-14 | 2012-11-21 | 北京星网锐捷网络技术有限公司 | Message fragment sending method, device and network equipment |
| CN102739552B (en) * | 2012-07-19 | 2015-09-23 | 迈普通信技术股份有限公司 | A kind of method and system realizing many master controls remote procedure call |
| CN104219178A (en) * | 2013-06-04 | 2014-12-17 | 中兴通讯股份有限公司 | Openflow-based control message processing method, Openflow-based control message transmitting device, Openflow-based control message receiving device and Openflow-based control message processing system |
| CN111163022B (en) * | 2018-11-08 | 2023-01-10 | 深圳市中兴微电子技术有限公司 | Message transmission method and device and computer readable storage medium |
| CN112839057A (en) * | 2021-02-09 | 2021-05-25 | 芯河半导体科技(无锡)有限公司 | Flexible and extensible Ethernet message excitation generator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1543104A (en) * | 2003-04-28 | 2004-11-03 | 华为技术有限公司 | Data transmission method for mobile packet network |
| CN1691639A (en) * | 2004-04-21 | 2005-11-02 | 华为技术有限公司 | A method of fragmented packet transmission |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1543104A (en) * | 2003-04-28 | 2004-11-03 | 华为技术有限公司 | Data transmission method for mobile packet network |
| CN1691639A (en) * | 2004-04-21 | 2005-11-02 | 华为技术有限公司 | A method of fragmented packet transmission |
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