CN108605040A - Communication device and frame sending method - Google Patents

Communication device and frame sending method Download PDF

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Publication number
CN108605040A
CN108605040A CN201680081062.7A CN201680081062A CN108605040A CN 108605040 A CN108605040 A CN 108605040A CN 201680081062 A CN201680081062 A CN 201680081062A CN 108605040 A CN108605040 A CN 108605040A
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China
Prior art keywords
frame
communication
transmitting
combination
binding pattern
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CN201680081062.7A
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CN108605040B (en
Inventor
住田崇史
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Communication Control (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

Have：As the frame engaging portion (13) of transmission unit, executes and the identical multiple fixed cycle frames of sending cycle are combined and generate the combination processing for being greater than or equal to 1 communication frame, communication frame is sent to network；Frame sending part (11) and communication unit (12)；And the frame error ratio calculating part (20) as error count unit, it counts communication mistake caused by communication frame, if the count value of the communication mistake obtained by error count unit reaches threshold value, transmission unit makes the number of the communication frame generated by combination processing increase.

Description

Communication device and frame sending method
Technical field
The present invention relates to the communication frame progress except the communication frame to periodically sending i.e. fixed cycle frame and fixed cycle frame The communication device and frame sending method of transmission.
Background technology
When communication device sends communication frame, the size of communication frame is adjusted sometimes.That is, communication device sometimes will be more A communication frame is sent in conjunction with and as 1 communication frame, or 1 communication frame segmentation is generated multiple communication frames and is sent. The technology that multiple communication frames are sent in conjunction with and as 1 communication frame is also referred to as polymerization technique.
In general, if communication frame becomes large-sized, the occurrence frequency for transmitting mistake rises, and the frequency retransmited increases Add, therefore transmission efficiency reduces.On the other hand, if the size of communication frame becomes smaller, the occurrence frequency for transmitting mistake is lower.But It is, in the case where dividing data and sent, that is, the case where using multiple communication frame transmission datas of small size Under, the ratio shared by expense that frame head of communication frame etc. is not used in data transmission is got higher, and the transmission efficiency of data reduces.Cause This, it is desirable to the size of communication frame is set as size as big as possible in the range of the probability of happening of transmission mistake does not rise.It is logical It crosses and the communication frame as large-sized as possible in the range of the wrong probability of happening of transmission does not rise is used transmission efficiency can be made to carry It is high.In addition, in the case where sending multiple communication frames in conjunction with and as 1 communication frame, being sent completely for communication frame is not needed Stand-by period until starting the transmission of communication frame next time afterwards, therefore transmission efficiency can be made to improve.But institute as above It states, the occurrence frequency that mistake is transmitted if the becoming large-sized of communication frame rises.
Additionally, it is known that in the presence of the communication for the on-fixed periodic frame for sending the fixed cycle frame periodically sent and non-periodically transmission Device.The communication device that the control device controlled multiple equipment has is in order to grasp the shape of each equipment of control object State etc. sends each control object equipment with the fixed cycle communication frame for the state of inquiring.In addition, what control device had Communication device the case where so that control object equipment is started certain action, in the feelings for making control object equipment stop action in execution Condition etc. sends the communication for indicating request content to control object equipment arbitrarily periodically to send out certain requests Frame.That is, the communication device that control device has sends fixed cycle frame and on-fixed periodic frame.Send fixed cycle frame and In the communication device of on-fixed periodic frame, it is desirable to use as big as possible in the range of the probability of happening of transmission mistake does not rise The communication frame of size.
Following invention is disclosed in patent document 1, that is, send the communication device pair of fixed cycle frame and on-fixed periodic frame The size of communication frame is adjusted.Communication device recorded in patent document 1 sends out the data separation of transmission with the fixed cycle The 1st data sent and the 2nd data irregularly sent can not be sent out in the remaining time until sending the 1st data next time In the case of sending the 2nd data, the 2nd data are divided, are generated transmittable in the remaining time until sending the 1st data next time Size the 2nd data and sent.
Patent document 1：Japanese Unexamined Patent Publication 2012-80171 bulletins
Invention content
There are the following problems in invention recorded in patent document 1, that is, does not have when the size to communication frame is adjusted There is consideration transmission efficiency, can not achieve the high communication of transmission efficiency.
The present invention is exactly to propose in view of the above problems, the communication that its object is to obtain that transmission efficiency can be made to improve Device.
In order to solve the above problems, reached purpose, the present invention have：Transmission unit executes sending cycle is identical Multiple fixed cycle frames in conjunction with and generate more than or equal to 1 communication frame combination processing, communication frame is sent to network；And Error count unit counts communication mistake caused by communication frame.If the communication obtained by error count unit The count value of mistake reaches threshold value, then transmission unit makes the number for the communication frame that combination processing is generated each time increase.
The effect of invention
Communication device of the present invention has the effect of that transmission efficiency can be made to improve.
Description of the drawings
Fig. 1 is the figure of the communication device for indicating application implementation mode 1 and an example of the communication system realized.
Fig. 2 is to indicate that the transmitting-receiving station in the communication system of embodiment 1 as communication device sends the action of communication frame Summary figure.
Fig. 3 is action example in the case of indicating that the transmission mistake of communication frame occurs in the communication system of embodiment 1 Figure.
Fig. 4 is the figure of the configuration example for the transmitting-receiving station as communication device for indicating embodiment 1.
Fig. 5 is the flow chart for the sending action carried out by transmitting-receiving station for indicating embodiment 1.
Fig. 6 is the flow chart of an example of the initial actuating for indicating that the transmitting-receiving station of embodiment 1 executes.
Fig. 7 is an example of the information for the fixed cycle frame for indicating that the transmitting-receiving station of embodiment 1 is obtained by initial actuating The figure of son.
Fig. 8 is to indicate that the information collection for the fixed cycle frame of embodiment 1 carried out by binding pattern determination section acts The flow chart of one example.
Fig. 9 is to indicate that the binding pattern determination section of embodiment 1 generates the dynamic of the candidate of the binding pattern of fixed cycle frame The figure of work.
Figure 10 is an example of the action that the binding pattern determination section of embodiment 1 determines the candidate of binding pattern Figure.
Figure 11 is to indicate that the transmitting-receiving station of embodiment 1 determines the flow chart of an example of the action of binding pattern.
Figure 12 is to indicate that the transmitting-receiving station of embodiment 1 determines the flow chart of an example of the action after binding pattern.
Figure 13 is the figure of an example of the frame sending action carried out by transmitting-receiving station for indicating embodiment 1.
Figure 14 is to indicate that the transmitting-receiving station of embodiment 1 determines the flow chart of an example of the action of binding pattern again.
Figure 15 is to indicate that the transmitting-receiving station of embodiment 1 determines the flow chart of an example of the action of binding pattern again.
Figure 16 is to indicate that the transmitting-receiving station of embodiment 1 is moved to what the number of the combination frame generated by combination processing changed The figure for the example made.
Figure 17 is the flow chart for the frame sending action carried out by transmitting-receiving station for indicating embodiment 2.
Figure 18 be indicate embodiment 2 to the presence or absence of transmitting-receiving station can make on-fixed periodic frame combine combination frame into The figure of the method for row judgement.
Figure 19 is the figure of the transmitting-receiving station for indicating application implementation mode 3 and an example of the network formed.
Figure 20 is to indicate that the transmitting-receiving station of embodiment 3 sends the figure of an example of the action of test frame.
Figure 21 is the hardware structure diagram of the transmitting-receiving station of embodiment 1 to 3.
Specific implementation mode
In the following, being based on attached drawing, the communication device be related to embodiments of the present invention and frame sending method carry out specifically It is bright.In addition, the present invention is not limited by present embodiment.
Embodiment 1.
First, the communication system of application communication device of the present invention is illustrated using Fig. 1 to Fig. 3.
Fig. 1 is the figure of an example of the communication system for indicating to realize using communication device of the present invention.
Fig. 1 shows to constitute in the transmitting-receiving station 1A and 1B comprising the communication device as embodiment 1 of the present invention Communication system in, transmitting-receiving station 1A sends communication frame, and transmitting-receiving station receives the communication frame.As communication frame, there are fixed cycle frames 120 to 123 and on-fixed periodic frame 130.Fixed cycle frame refers to fixed cycle with the fixed cycle, i.e. pre-determined from transmitting-receiving The 1A that stands repeats the communication frame sent.On the other hand, and on-fixed periodic frame refer to do not determine the period sent meeting it is solid The case where fixed condition etc., the communication frame sent from transmitting-receiving station 1A in the case where being judged as needing to send.In addition, in Fig. 1, Only transmitting-receiving station 1A is sent, but transmitting-receiving station 1B also can identically as transmitting-receiving station 1A send communication frame i.e. fixed cycle frame and non- Fixed cycle frame.In the present embodiment, it is contemplated that the feelings that transmitting-receiving station 1A continuously sends multiple fixed cycle frames 120 to 123 Condition.But the number of the fixed cycle frame continuously transmitted is not limited to content shown in FIG. 1.The fixed cycle frame that will be continuously transmitted 120 to 123 are referred to as fixed cycle frame group.In addition, i.e. only on-fixed periodic frame is shown in FIG. 11 on-fixed periodic frame 130 examples sent as on-fixed periodic frame group, but connect sometimes using multiple on-fixed periodic frames as on-fixed periodic frame group Supervention is sent.
Fig. 2 is to indicate that transmitting-receiving station 1A in communication system shown in Fig. 1 sends the figure of the summary of the action of communication frame.Transmitting-receiving A part of fixed cycle frame in the multiple fixed cycle frames for constituting fixed cycle frame group can be bonded to each other by the 1A that stands, and will be greater than Or it is sent as 1 communication frame equal to 2 communication frames.In the present specification, communication frame claims obtained from executing combination processing To combine frame.
In the example shown in Fig. 2, transmitting-receiving station 1A by the fixed cycle frame 120 and 121 generated inside our station in conjunction with and It generates and combines frame 40, fixed cycle frame 122 and 123 is combined and is generated in conjunction with frame 41.By multiple communication frames in conjunction with and as 1 It, need not be between the communication frame continuously transmitted when necessary transmission waiting in the case that a communication frame combines frame to send Between, the stand-by period i.e. after being sent completely of 1 communication frame until starting the transmission of communication frame next time.Therefore, energy Enough improve the transmission efficiency of data.But if communication frame is elongated, there are the transmission mistakes of communication mistake, that is, communication frame The problem of probability of happening rises.In addition, being provided in a network sometimes so that transmit the incidence of mistake no more than fixed Value.In view of these situations, transmitting-receiving station 1A is thought of as so that the probability of happening for transmitting mistake is no more than predetermined threshold value Meanwhile by fixed cycle frame in conjunction with and send.
In addition, in the example shown in Fig. 2, by every 2 of 4 fixed cycle frames in conjunction with and generate 2 and combine frame, but also may be used 3 fixed cycle frames to be combined.In this case, become sending the combination after 3 fixed cycle frames combine from transmitting-receiving station 1A Frame and the 1 fixed cycle frame not combined with other fixed cycle frames, but in various embodiments, it is for convenience of explanation, right The 1 fixed cycle frame not combined with other fixed cycle frames also referred to as combines frame.
The number for the fixed cycle frame that transmitting-receiving station 1A shown in Fig. 2 is included based on fixed cycle frame group, each fixed cycle frame Size, the transmission error rate etc. in conjunction with frame, the combination of the fixed cycle frame of number and combination to the fixed cycle frame of combination, with And it sends and the sequence of frame is combined to be determined.In transmitting-receiving station 1B, if to being received in conjunction with frame, divided as needed Processing is cut, the fixed cycle frame 120 to 123 before being combined by the transmitting-receiving station 1A of transmission source is restored.
Fig. 3 is the figure for indicating to occur in a communications system the action example in the case of the transmission mistake of communication frame.In Fig. 3 institutes In the example shown, transmitting-receiving station 1A sends 3 and combines frame 40,41 and 42.If transmitting-receiving station 1B normally receives combination frame, ACK (Acknowledgment) frame of the response normally received as expression is returned.In the example shown in Fig. 3, transmitting-receiving station 1B will send back to transmitting-receiving station 1A to being normally received in conjunction with frame 40 and 41 relative to their ACK frames 50 and 51.Transmitting-receiving station 1A Feelings in conjunction with frame are normally received to situation, the i.e. transmitting-receiving station 1B by carrying out receiving to combine the transmission of frame successful to ACK frames Condition is detected.Include to indicate it is the information relative to which in conjunction with the ACK frames of the reception of frame in ACK frames.Transmitting-receiving station 1A exists It sends after combining frame, in the case where being not received by ACK frames within the set time, retransmits and the ACK frames pair that do not receive The combination frame answered.In the example shown in Fig. 3, since transmitting-receiving station 1A is not received by relative to the ACK frames for combining frame 42, It is combined retransmiting for frame 42, the transmitting-receiving station 1B for having received the combination frame 42 after retransmiting normally receives expression in conjunction with frame 42 ACK frames 52 are returned.In addition, the example for sending the case where combining frame is illustrated, but send on-fixed periodic frame Situation is also identical.
The example in conjunction with frame cannot be normally received in the presence of as transmitting-receiving station 1B, in conjunction with the no arrival transmitting-receiving station 1B's of frame itself Example and after combining frame to reach transmitting-receiving station 1B but by frame check sequence (FCS：Frame Check Sequence) detect it is different Normal example.Transmitting-receiving station 1B can also be used as in the case where detecting exception by FCS to detecting abnormal combination frame again It sends the response made requests on and returns NACK (Negative Acknowledgment) frame.
In the following, being illustrated to the configuration example of communication device of the present invention.Fig. 4 is to indicate conduct of the present invention The figure of the configuration example of the transmitting-receiving station 1 of communication device.Transmitting-receiving station 1 is equivalent to Fig. 1 to transmitting-receiving station 1A and 1B shown in Fig. 3.
Transmitting-receiving station 1 has frame sending part 11, communication unit 12, frame engaging portion 13, binding pattern determination section 14, Framing Error Detection Portion 15, in conjunction with frame cutting part 16, frame determination unit 17, transmission buffer 18, send frame generating unit 19, frame error ratio calculating part 20, Receive buffer 21, frame error thresholds configuration part 22 and frame response portion 23.
First, pair relevant constituting portion is acted with the reception of communication frame to illustrate.
Communication unit 12 receives combination frame, on-fixed periodic frame or ACK frames as track data from network line, will Combination frame, on-fixed periodic frame or ACK frames after reception are exported to Framing Error Detection portion 15.
Framing Error Detection portion 15, which is directed to, is detected the mistake of frame by each frame that communication unit 12 inputs.Framing Error Detection Portion 15 will normally receive frame this case and do not had in the case where the mistake in conjunction with frame or on-fixed periodic frame is not detected There is the identification number for the combination frame or on-fixed periodic frame that detection makes mistake to be collectively notified frame sending part 11.Receive the notice Frame sending part 11 will be attached with the receipts of the ACK frames of the identification number notified to the transmission source for combining frame or on-fixed periodic frame It returns at hair station.In addition, Framing Error Detection portion 15 divides the combination frame that mistake is not detected or on-fixed periodic frame to combination frame Cut the output of portion 16.It Framing Error Detection portion 15, will not detection in the case where detecting to combine the mistake of frame or on-fixed periodic frame The combination frame or on-fixed periodic frame to make mistake is exported to combination frame cutting part 16.In this case, Framing Error Detection portion 15 is not The identification number of combination frame or on-fixed periodic frame that detection makes mistake is notified to frame sending part 11.Therefore, not from communication ACK frames are returned to the transmitting-receiving station of the transmission source of combination frame or on-fixed periodic frame in portion 12.
In addition, Framing Error Detection portion 15 be not detected relative to combine frame ACK frames mistake in the case of, will be attached The identification number for being added on ACK frames is notified to frame response portion 23.That is, Framing Error Detection portion 15 will combine the successful information of transmission of frame And the identification number of the combination frame after sending successfully is collectively notified frame response portion 23.In contrast, Framing Error Detection portion 15 exists In the case of detecting the mistake relative to the ACK frames for combining frame, any notice is not carried out to frame response portion 23.
Frame response portion 23 obtains the identification number for the combination frame that frame sending part 11 is sent out from frame sending part 11, based on acquirement Rear identification number and the identification number for being additional to the ACK frames being successfully received notified from Framing Error Detection portion 15, to whether Frame sending part 11 will be then forwarded in conjunction with frame by, which needing, judges.Specifically, frame response portion 23 is sent from frame sending part 11 In conjunction with frame to by during certain time, not notified from Framing Error Detection portion 15 to the combination sent from frame sending part 11 In the case of the identification number of frame, it is judged as needing to be combined retransmiting for frame.Frame response portion 23 is being judged as needing to carry out In the case of in conjunction with the retransmiting of frame, it would be desirable to which the identification number of the combination frame retransmited is notified to frame sending part 11, right It retransmits and is indicated.The frame sending part 11 for receiving the instruction retransmits the combination frame indicated.Frame response portion 23 It can be configured to, have timer, if the identification number for the combination frame for notifying to be sent by frame sending part 11 from frame sending part 11, Then the timer starts the counting of certain time, if the combination frame for notifying to be sent by frame sending part 11 from Framing Error Detection portion 15 Identification number, then the timer stop count, timer expire in the case of be judged as need retransmit.Frame response portion 23 It combines frame to during passing through certain time being sent from frame sending part 11, is notifying to from frame to send from Framing Error Detection portion 15 In the case of the identification number for the combination frame that portion 11 is sent, combination frame is sent successfully and is sent the successful identification for combining frame Number is collectively notified binding pattern determination section 14.In addition, frame response portion 23 is sent from frame sending part 11 in conjunction with frame to process During certain time, the identification number to the combination frame sent from frame sending part 11 is not being notified from Framing Error Detection portion 15 In the case of, the identification number of the transmission failure for combining frame and the combination frame for sending failure is collectively notified binding pattern and is determined Portion 14.
In conjunction with frame cutting part 16 in the case where being had input from Framing Error Detection portion 15 in conjunction with frame, dividing processing is executed, it is right Fixed cycle frame before the transmitting-receiving station of transmission source combines is restored, and by the sequence of each fixed cycle frame after recovery Revert to the sequence before combining.Herein, the inside of each fixed cycle frame before combination assigns the mark for having the sequence for indicating frame Symbol, by being read in conjunction with frame cutting part 16, thus, it is possible to identify the sequence of each fixed cycle frame.If in conjunction with frame cutting part 16 Execute dividing processing and rearrange processing and each fixed cycle frame is restored to original state, then by each fixed cycle frame to Buffer 21 is received to export.In addition, in conjunction with frame cutting part 16 in the feelings for having input on-fixed periodic frame from Framing Error Detection portion 15 Under condition, directly exported as former state to reception buffer 21.
Buffer 21 is received to being preserved from the fixed cycle frame and on-fixed periodic frame that combine frame cutting part 16 to input. Fixed cycle frame and on-fixed periodic frame that buffer 21 preserves are received by readings such as the applications that needs the illustration omitted of these frames. In addition, the case where having received frame for not being destined to our station etc. in reception buffer 21, needing to transfer to the frame of other transmitting-receiving stations Under, which is read by transmission frame generating unit 19 Deng, is sent to other transmitting-receiving stations.
In the following, pair being illustrated with the relevant constituting portion of frame sending action.
It sends frame generating unit 19 and generates the fixed cycle frame before combining and on-fixed periodic frame as frame is sent, will be generated Transmission frame to frame determination unit 17 export.Frame generating unit 19 is sent to preserve and should transfer to other transmitting-receiving stations in reception buffer 21 Frame in the case of, can also be read, be exported to frame determination unit 17 as sending frame the rewriting etc. for carrying out frame head is rear.
The judgement of transmission frame that frame determination unit 17 inputted by transmission frame generating unit 19 meets fixed cycle frame and non- The calculating of the frame length of which judgement of fixed cycle frame and the transmission frame after input.Frame determination unit 17 will send frame Judge that result and calculated frame length are exported to binding pattern determination section 14, and exported frame is sent to transmission buffer 18. Herein, frame determination unit 17 indicates that sending frame meets fixed cycle frame and on-fixed week in the frame head for sending frame inserted with frame category Which judged by reading the information in the case of information of phase frame.Frame category can not also be inserted into transmission frame Frame head and as data packet contained in send frame.In addition, the transmission of fixed cycle frame and on-fixed periodic frame by by timesharing It can also be judged according to the time of transmission in the case of periodically independent.
Transmission buffer 18 to via frame determination unit 17 from send frame generating unit 19 export, by frame engaging portion 13 with it is other On-fixed periodic frame before sending the fixed cycle frame before frame combines and sending is preserved.
Binding pattern determination section 14 based on the frame category and frame length inputted by frame determination unit 17, by frame error thresholds configuration part The threshold value of the frame error ratio of 22 inputs and the frame error ratio inputted by frame error ratio calculating part 20, to by transmission buffer 18 The combination of the binding pattern, the fixed cycle frame being combined of each fixed cycle frame preserved and when combining fixed cycle frame The sequence of each fixed cycle frame determined, determination result is exported to frame engaging portion 13.Herein, binding pattern determination section 14 It can also be not present in the change of fixed cycle frame inside in the case of carry out sequence indicating the information of the sequence of fixed cycle frame It more, can also be on the basis of order information be in addition additional to fixed cycle frame to sequentially changing.It is additional to fixed week The order information of phase frame is the information of the sequence for the script for indicating each fixed cycle frame.Binding pattern determination section 14 is by by frame The information that determination unit 17 inputs is confirmed, will appreciate that the sequence of the script of each fixed cycle frame, i.e., by transmission frame generating unit 19 generate the sequence of each fixed cycle frame.Binding pattern determination section 14 by order information be additional to send frame in the case of, from Transmission buffer 18 will send frame and read once, be stored again after additional sequence information.In addition to binding pattern determination section The specific action of the case where binding pattern of 14 decision fixed cycle frames illustrates.The binding pattern determination section 14 is to combine mould Formula determining means.
In addition, whether binding pattern determination section 14 succeeds transmission inputted by frame response portion 23, each combination frame of expression Information and identification number to frame error ratio calculating part 20 export.
If whether the transmission for inputting each combination frame by binding pattern determination section 14 succeeds and identification number, frame mistake Rate calculating part 20 stores it, and to combining the frame error ratio of frame to calculate.Frame error ratio can be by with transmission Total number in conjunction with frame divided by the number of the transmission failure in conjunction with frame calculate.If frame error ratio calculating part 20 calculates Frame error ratio then exports result of calculation to binding pattern determination section 14.In addition, in Fig. 4, being set as determining via binding pattern Whether the transmission for respectively combining frame that frame response portion 23 exports succeeds in portion 14 and identification number is exported to frame error ratio calculating part 20, But the composition directly exported from frame response portion 23 to frame error ratio calculating part 20 can also be set as.The frame error ratio calculating part 20 is To the error count unit counted in the communication mistake for combining frame to generate.
Frame engaging portion 13 is consolidated according to the binding pattern determined by binding pattern determination section 14 by what transmission buffer 18 preserved Fixed cycle frame combines.Frame engaging portion 13 is defeated to frame sending part 11 by the combination frame for executing the combination processing of fixed cycle frame and generating Go out.At this point, frame engaging portion 13 respectively combines frame additional identification number to output.
Frame sending part 11 exports the combination frame inputted from frame engaging portion 13 to communication unit 12, and will implement and be exported Combination frame identification number and send this case notice to frame response portion 23.Communication unit 12 is to being inputted by frame sending part 11 Modulation corresponding with the network line of output destination of frame is combined is carried out in conjunction with frame, is exported to network line.These frames are sent Portion 11 and communication unit 12 constitute transmission unit together with frame engaging portion 13.
Then, illustrate part or all of combination of the multiple fixed cycle frames sent with same period by transmitting-receiving station 1 And the action sent.
Fig. 5 is the flow chart for the sending action for indicating to be carried out by transmitting-receiving station 1.In the sending action carried out by transmitting-receiving station 1, As shown in figure 5, as initial actuating, the collection of the required information of sending action is carried out, is specifically obtained in conjunction with object (step S1) such as the information of fixed cycle data packet.
Fig. 6 is to indicate initial actuating shown in fig. 5, i.e., the flow chart of an example of the initial actuating that transmitting-receiving station 1 executes. In the initial actuating carried out by transmitting-receiving station 1, first, the information (step S11) of fixed cycle frame is obtained.Fig. 7 shows fixed week The information of phase frame.Fig. 7 is an example of the information for indicating fixed cycle frame.By binding pattern determination section 14 to judging from frame The frame judgement result that portion 17 exports is parsed and is obtained the information of fixed cycle frame shown in Fig. 7.That is, binding pattern determination section 14 obtain by the frame number 70 of the fixed cycle frame group constituted using multiple fixed cycle frames that same period is sent and as being constituted The fixed cycle frame data length 60 to 64 of the frame length of each of the fixed cycle frame 124 to 128 of fixed cycle frame group.Fixed week The frame number 70 of phase frame group is the number for the fixed cycle frame that transmitting-receiving station 1 is sent in each sending cycle.
Fig. 8 is an example of the information collection action for the fixed cycle frame for indicating to be carried out by binding pattern determination section 14 Flow chart.Whether binding pattern determination section 14 is to detecting fixed cycle frame, specifically, if is notified of from frame determination unit 17 Indicate that the judgement result of fixed cycle frame is monitored (step S21), (the step S21 in the case where detecting fixed cycle frame： Yes), the type of fixed cycle frame and size i.e. frame length that detect are stored (step S22).In addition, with to fixed week It is stored for the purpose of the type of phase frame is distinguished there are multiple fixed cycle frames, the information can also be replaced to identification Number is stored.It, then can also be to the types of these fixed cycle frames, identification if it is the information that can distinguish fixed cycle frame Other information except number is stored.
(the step S21 in the case where fixed cycle frame is not detected of binding pattern determination section 14：No) and step is performed In the case of rapid S22, confirm to whether have passed through the stipulated time after the information collection action for starting fixed cycle frame. By (step S23 in the case of the stipulated time：No), step S21 is back to continue with.It will be set as stipulated time than solid The time of the sending cycle length of fixed cycle frame.The sending cycle of fixed cycle frame is set as advance by the system of application transmitting-receiving station 1 The period of imagination.(the step S23 in the case where have passed through the stipulated time：Yes), binding pattern determination section 14 is until by rule The type of fixed cycle frame and size that are stored in step S22 are confirmed during fixing time, the transmission to fixed cycle frame Period, the fixed cycle frame sent with same period number be the number of the fixed cycle frame sent in each sending cycle, with And the size of each fixed cycle frame is stored (step S24), is ended processing.In addition, the sending cycle of fixed cycle frame can be with It is found out by detecting that the time interval of the fixed cycle frame of identical type calculates.In addition, in each transmission week The number for the fixed cycle frame that phase sends can be detected what kind of by the species number to the fixed cycle frame detected Fixed cycle frame is confirmed and is found out.It is equivalent to above-mentioned fixed week in the number for the fixed cycle frame that each sending cycle is sent The frame number 70 of phase frame group.
It is back to the explanation of Fig. 6, after transmitting-receiving station 1 achieves the information of fixed cycle frame in step s 11, to frame error ratio Threshold value set (step S12).In step S12, frame error thresholds configuration part 22 sets binding pattern determination section 14 Determine threshold value.Frame error thresholds configuration part 22 receives the input of the threshold value of setting from external operator, in binding pattern determination section The received threshold value of 14 settings.Frame error thresholds configuration part 22 obtains threshold value via the input units such as the keyboard recorded are omitted. In present embodiment, the threshold value as frame error ratio sets the 1st threshold value and the 2nd threshold value, the suitable Mr. Yu's fixed range of the 1st threshold value Upper limit value, the 2nd threshold value are equivalent to the lower limiting value of the fixed range.In addition, the sequence that step S11 shown in fig. 6 and S12 is executed It can be opposite.
Transmitting-receiving station 1 generates the candidate (step of the binding pattern of fixed cycle frame after executing above-mentioned steps S11 and S12 S13).The processing of step S13 is executed by binding pattern determination section 14.Binding pattern determination section 14 is given birth to reference to Fig. 9 and Figure 10 It is illustrated at the action of the candidate of the binding pattern of fixed cycle frame.
Fig. 9 is to indicate that binding pattern determination section 14 generates the figure of the action of the candidate of the binding pattern of fixed cycle frame.Such as Shown in Fig. 9, the number for the candidate that binding pattern determination section 14 generates is become dependent on the frame number N that fixed cycle frame group is included Change.The knot that binding pattern determination section 14 is generated respectively about each fixed cycle frame execution combination processing to fixed cycle frame group The case where number for closing frame is 1 is (in conjunction with rear frame number：1 the case where), the case where being 2 ..., the case where being N, generate that indicate will be each one by one How fixed cycle frame combines and is set as the binding pattern in conjunction with frame.Therefore, binding pattern determination section 14 generates fixed cycle frame The candidate of included fixed cycle the frame number N and identical number of group.Further, since the number for the combination frame for executing combination processing and generating The case where being 1 and a kind of binding pattern is only existed in the case of being N, therefore binding pattern determination section 14 can also actually be distinguished The case where number of the combination frame generated for execution combination processing is 2 to N-1 generates candidate.
Figure 10 is the case where number for the combination frame for indicating that binding pattern determination section 14 is generated to executing combination processing is 2 The figure of one example of the action that the candidate of binding pattern is determined.In the example shown in Fig. 10, fixed cycle frame group is by 5 A fixed cycle frame is constituted.As shown in the binding pattern 60 of Figure 10, binding pattern determination section 14 is by dividing 5 fixed cycle frames For 2 groups 46 and 47, by identical group of fixed cycle frame in conjunction with and generate and combine frame.At this point, binding pattern determination section 14 is to knot Frame length AAbyte, BBbyte after conjunction are calculated, and big conduct longest frame length is stored.In Fig. 10, due to group The frame length AAbyte of 46 corresponding combination frames is big, therefore binding pattern determination section 14 stores it.
Also, binding pattern determination section 14 is directed to the binding pattern 61 for the case where having carried out other groupings, to respectively from group 48 and 49 generations respectively combine the frame length CCbyte and DDbyte of frame to be calculated, and are stored to big.In addition, binding pattern Determination section 14 is directed to the pattern i.e. group 4A and 4B for the case where frame sequential is substituted as shown in binding pattern 62, to what is generated from each group Respectively the frame length EEbyte and FFbyte of frame is combined to be calculated, big is stored.Same as belowly, to each binding pattern Longest frame length is stored.That is, binding pattern determination section 14 for it is contemplated that whole binding patterns, to the combination frame of generation Frame length is calculated, and the maximum value in calculated frame length is stored as longest frame length.
Herein, it since the length of frame the long, the incidence of frame mistake more gets higher, therefore phase is being generated by combination processing In the case of combination frame with number, length is preferably set as combination frame as short as possible.Therefore, binding pattern determination section 14 will be deposited The binding pattern of the combination frame of the shortest longest frame length of generation in the longest frame length of each binding pattern of storage is determined as executing knot Close processing and generate combination frame number be 2 the case where binding pattern.
The case where number of the combination frame generated for execution combination processing is 2 is illustrated, but binding pattern determines The case where number for the combination frame that portion 14 is generated to executing combination processing is 3 to N-1 also determines binding pattern with identical sequence. The feelings that the number of the combination frame generated respectively by combination processing determined in the above described manner is 1 to N by binding pattern determination section 14 The binding pattern of condition is stored as the candidate of binding pattern.
In addition, binding pattern determination section 14 can also in the following order determine the candidate of binding pattern.That is, in conjunction with The fixed cycle frame of fixed cycle frame group is sequentially allocated to and the frame number after combination by pattern determination section 14 from maximum size The group of identical number.At this point, total size of allocated fixed cycle frame matches fixed cycle frame to minority component.In total size There are can also distribute to arbitrarily smallest size of group total in the case of multiple for minimum group.
As specific example, in the case where fixed cycle frame group includes 7 fixed cycle frames of frame A below to frame G, It indicates to generate 3 candidates of binding pattern in conjunction with the case where frame to combining these 7 fixed cycle frames and determine Fixed action.
Frame A：Frame length=20byte
Frame B：Frame length=25byte
Frame C：Frame length=60byte
Frame D：Frame length=30byte
Frame E：Frame length=45byte
Frame F：Frame length=50byte
Frame G：Frame length=40byte
First, longest frame C (frame length=60) is allocated in the 1st group by binding pattern determination section 14, then, by the 2nd length Frame F (frame length=50) is allocated in the 2nd group, and the frame E (frame length=45) of the 3rd length is allocated in the 3rd group.At the time point, it is allocated in Total size of the frame of 1st group to the 3rd group of each is 60,50,45.Then, the frame that binding pattern determination section 14 is grown the 4th G (frame length=40) is allocated in minimum the 3rd group at the time point.As a result, being allocated in total ruler of the 1st group to the 3rd group of frame It is very little to be respectively 60,50,85.Then, the frame D (frame length=30) of the 5th length is allocated in by binding pattern determination section 14 at the time point Smallest size of 2nd group total, the total size for being allocated in the 1st group to the 3rd group of frame is respectively 60,80,85.Then, in conjunction with The frame B (frame length=25) of 6th length is allocated in total smallest size of 1st group by pattern determination section 14 at the time point, is allocated in Total size of 1st group to the 3rd group of frame is respectively 85,80,85.Then, the frame A (frames that binding pattern determination section 14 is grown the 7th Long=20) it is allocated in minimum the 2nd group at the time point, terminates the grouping of each fixed cycle frame.Then, binding pattern determination section 14 pairs of putting in order when being combined and generating in conjunction with frame by group by each fixed cycle frame for being allocated in the 1st group to the 3rd group, with Determined by way of the front for combining frame sending the fixed cycle frame that frame generating unit 19 first generates.
As described above, the binding pattern for the case where binding pattern determination section 14 will be by that will combine fixed cycle frame, from size I.e. the big fixed cycle frame of frame length in sequence, distributes to the smallest size of group total of allocated fixed cycle frame, to The binding pattern that the combination frame full-size generated by combination processing becomes minimum can be exported.
It is the initial actuating of step S1 shown in fig. 5 above.If transmitting-receiving station 1 terminates initial actuating, next, to knot Syntype is determined (step S2).
The action of binding pattern, which illustrates, to be determined in above-mentioned steps S2 to transmitting-receiving station 1.Figure 11 is to indicate that transmitting-receiving station 1 is determined Determine the flow chart of an example of binding pattern action.
For transmitting-receiving station 1, first, binding pattern determination section 14 will be at the beginning of the number i in conjunction with frame that generated by combination processing Beginningization (step S31).That is, the number i of the combination frame generated by combination processing is set as i=1 by binding pattern determination section 14.This Place, i be more than or equal to 1 and be less than or equal to the fixed cycle frame group fixed cycle frame that is included number integer.In fixation In the case that the number for the fixed cycle frame that periodic frame group is included is set as N, i is more than or equal to 1 and whole less than or equal to N Number.
Then, transmitting-receiving station 1 starts to generate the i action (step S32) sent in conjunction with frame.That is, frame engaging portion 13 will be consolidated Fixed cycle frame in conjunction with and generate i and frame, frame sending part 11 combined to be sent to via communication unit 12.Later, with regard to transmitting-receiving station 1 and Speech, it is standby to by stipulated time (step S33：No), if by stipulated time (step S33：Yes), then a according to i is generated In conjunction with frame setting in conjunction with and generate fixed cycle frame, whether greatly simultaneously than the 2nd threshold value to the frame error ratio of the combination frame after transmission And smaller than the 1st threshold value confirmed (step S34).It is bigger and smaller than the 1st threshold value than the 2nd threshold value in the frame error ratio for combining frame In the case of (step S34：Yes), the number of the combination frame generated by combination processing is determined as i (step S36) by transmitting-receiving station 1.That is, Transmitting-receiving station 1 is determined as in the candidate of the binding pattern determined using the initial actuating of S1 through the above steps and generation combination The corresponding binding pattern of situation that the number of frame is i.In addition, transmitting-receiving station 1 is combining the frame error ratio of frame to be not involved in than the 2nd (step S34 in the case that threshold value is big and the range smaller than the 1st threshold value：No), to i whether with combine object fixed cycle frame Number, which is that the number for the fixed cycle frame that fixed cycle frame group is included is equal, to be confirmed (step S35).Transmitting-receiving station 1 is in i and combination (step S35 in the case that the fixed cycle frame number of object is equal：Yes), the combination frame that transmitting-receiving station 1 will be generated by combination processing Number be determined as i (step S36).Transmitting-receiving station 1 is in i and the unequal (step of fixed cycle frame number for combining object S35：No), transmitting-receiving station 1 adds 1 (step S37) to i, is back to step S32 and continues with.Step S33 to S37 is to combine mould The processing that formula determination section 14 executes.
It is back to the explanation of Fig. 5, if it is determined that going out binding pattern, then transmitting-receiving station 1 starts the binding pattern to determine Communication i.e. with the binding pattern that determines by fixed cycle frame in conjunction with and the action (step S3) that sends.It is determined by binding pattern Determine portion 14 to notify the binding pattern determined in above-mentioned steps S2 to frame engaging portion 13 to start the action of step S3.Below Detailed content is described, in the action of step S3, to whether the change of binding pattern being needed suitably to be confirmed, is being judged as needing In the case of the change for wanting binding pattern, it is transitioned into step S4 and determines binding pattern again.If determining binding pattern again, Then transmitting-receiving station 1 is back to step S3, is communicated with the binding pattern determined again.
Figure 12 is the action of the transmitting-receiving station 1 after indicating to execute step S2 shown in fig. 5 and being determined to binding pattern The flow chart of one example.Flow shown in Figure 12 illustrates the detailed interior of action corresponding with step S3 and S4 shown in fig. 5 Hold.
Whether transmitting-receiving station 1 be not fixed cycle frame to being that the transmission timing of fixed cycle frame is confirmed (step S41) Transmission timing in the case of (step S41：No), to becoming shape to be sent with the presence or absence of on-fixed periodic frame to be sent The on-fixed periodic frame of state is confirmed (step S42).(the step there is no on-fixed periodic frame to be sent S42：No), transmitting-receiving station 1 is back to step S41 and continues to act.If transmission buffer 18 preserves the on-fixed period Frame, then transmitting-receiving station 1 is judged as there are on-fixed periodic frame to be sent, if transmission buffer 18 does not preserve on-fixed week Phase frame, then transmitting-receiving station 1 be judged as be not present on-fixed periodic frame to be sent.There are the feelings of on-fixed periodic frame to be sent (step S42 under condition：Yes), transmitting-receiving station 1 sends the on-fixed periodic frame (step S43) of state to be sent, is back to step S41 And continue to act.
In addition, (the step S41 for the transmission timing of fixed cycle frame：Yes), to the presence or absence of to be sent On-fixed periodic frame is confirmed (step S44).(the step S44 there is no on-fixed periodic frame to be sent： No), transmitting-receiving station 1, which is sent, combines frame (step S46).That is, in transmitting-receiving station 1, according to the knot determined by binding pattern determination section 14 Syntype by fixed cycle frame in conjunction with and generate in conjunction with frame, will be after generation respectively frame is combined to be sent to network line.
(the step S44 there are on-fixed periodic frame to be sent：Yes), transmitting-receiving station 1 is to sent non-solid Whether the priority of fixed cycle frame is that high priority is confirmed (step S45).Inside of the transmitting-receiving station 1 based on on-fixed periodic frame Frame category, the priority of on-fixed periodic frame is judged.It is Gao You in the priority of on-fixed periodic frame to be sent (step S45 in the case of first grade：Yes), first, transmitting-receiving station 1 sends on-fixed periodic frame, complete in the transmission of on-fixed periodic frame Cheng Hou sends and combines frame (step S47).The action of step S47 is equivalent to shown in the upper layer of Figure 13 that " [1] there are on-fixeds The case where periodic frame (priority is high) ".It is shown in the action example shown in the upper layer of Figure 13, in transmitting-receiving station 1, with the fixed cycle Frame 120, on-fixed periodic frame 130, fixed cycle frame 121, fixed cycle frame 122 and fixed cycle frame 123 are sequentially generated The case where each frame.In this example embodiment, due to the priority of on-fixed periodic frame 130 height, transmitting-receiving station 1 sends on-fixed first Then periodic frame 130 is generated in conjunction with frame 40 and is sent, ultimately produce in conjunction with frame 41 and send.On the other hand, to be sent non- The priority of fixed cycle frame is not (step S45 in the case of high priority：No), transmitting-receiving station 1 is sent first combines frame, is combining After being sent completely of frame, on-fixed periodic frame (step S48) is sent.The action of step S48 is equivalent to shown in the lower layer of Figure 13 The case where " [2] there are on-fixed periodic frame (priority are low) ".It shows, is receiving and dispatching in the action example shown in the lower layer of Figure 13 It stands in 1, with fixed cycle frame 120, on-fixed periodic frame 131, fixed cycle frame 121, fixed cycle frame 122 and fixed week The case where being sequentially generated each frame of phase frame 123.In this example embodiment, since the priority of on-fixed periodic frame 131 is low, transmitting-receiving It stands and 1 firstly generates in conjunction with frame 40 and send, then generate in conjunction with frame 41 and send, finally send on-fixed periodic frame 131.
In fig. 12, it is recorded though omitting, the case where transmitting-receiving station 1 executes step S46, S47 or S48 and has sent frame Under, to combining whether the transmission of frame is successfully confirmed and stored.In addition, in the case where combining the transmission failure of frame, transmitting-receiving The combination frame that 1 pair sends failure of standing retransmits.Failure is also sent being retransmited by pre-determined number In the case of, transmitting-receiving station 1 is no longer retransmited.As the information stored in the case where having sent in conjunction with frame, it is contemplated that being The information that frame error ratio is calculated and is needed, specifically, it is contemplated that the number of the combination frame sent, at the time of send, And the number etc. of the combination frame as transmission mistake, but it is not limited to these information.As long as frame error ratio or phase can be calculated When in the information of the frame error ratio, being then any information.The combination frame sent can be also known if knowing binding pattern Number, therefore can also to binding pattern and transmission mistake frequency store.
If transmitting-receiving station 1 executes step S46, S47 or S48 and sends frame, next by frame error ratio and the 1st threshold value and Whether the 2nd threshold value is compared (step S49, S50), to needing the change of binding pattern to judge, be judged to needing to become Again binding pattern (step S51, S52) is determined in the case of more.Detailed content about these each steps is followed by narration. 1st threshold value and the 2nd threshold value are the threshold values of the frame error ratio set by above-mentioned initial actuating (the step S1 of Fig. 5, with reference to Fig. 6), 2nd threshold value<The relationship of 1st threshold value is set up.
In addition, in the example shown in Figure 12, be set as it is every send combine frame when, that is, in every execution step S46, S47 or When S48, frame error ratio is compared with the 1st threshold value and the 2nd threshold value, but can also be set as in every combination for carrying out stipulated number Frame error ratio is compared with the 1st threshold value and the 2nd threshold value when the transmission of frame.Alternatively, it is also possible to not the moving in conjunction with frame with transmission Make synchronously, to be compared frame error ratio with the 1st threshold value and the 2nd threshold value with the arbitrary period.That is, can also be with arbitrary week Phase executes the action of the step S49 to S52 shown in Figure 12.
(the step S49 in the case where frame error ratio is less than or equal to 2 threshold value of transmitting-receiving station 1：Yes), make the combination of generation The number of frame reduces (step S52).That is, transmitting-receiving station 1 is judged as that frame error ratio is low, even if generating the combination that frame length is grown compared with current Frame and sent also that there is no problem, determine binding pattern again and several ratios of the combination frame generated by combination processing worked as It is preceding few.It refers to increasing in the number for generating the fixed cycle frame that 1 combines when combining frame that the number of the combination frame of generation, which is reduced, 1 knot The frame length for closing frame is elongated.The action for determining binding pattern again in step S52 is described below.Transmitting-receiving station 1 is walked making execution After rapid S52 and the number of combination frame that generates are reduced, it is back to step S41 and continues to act.
(the step S49 in the case where frame error ratio is bigger than the 2nd threshold value of transmitting-receiving station 1：No), whether frame error ratio is more than or Confirmed (step S50) equal to the 1st threshold value, (the step S50 in the case where frame error ratio is smaller than the 1st threshold value：No), it is back to Step S41 and continue to act.In the case where frame error ratio is bigger and smaller than the 1st threshold value than the 2nd threshold value, current combination Pattern is that the number of the combination frame generated by combination processing is appropriate, is equivalent to the state that need not change binding pattern.It receives (the step S50 in the case where frame error ratio is greater than or equal to 1 threshold value of hair station 1：Yes), the number of the combination frame of generation is made to increase (step S51).That is, transmitting-receiving station 1 is judged as frame error ratio height, need to generate that the frame length compared with currently is short is sent in conjunction with frame, Again it determines binding pattern and makes the number of the combination frame generated by combination processing more than current.The number of the combination frame of generation increases It refers to being reduced in the number for generating the fixed cycle frame that 1 combines when combining frame to add, and 1 combines the frame length of frame to shorten.Transmitting-receiving station 1 exists Make execution step S51 after the number of the combination frame that generates increases, is back to step S41 and continues to act.
Using Figure 14, the action to executing in step s 51, specifically, determining binding pattern again and to pass through The number for the combination frame that combination processing generates becomes more actions compared with current and illustrates.
Figure 14 is to indicate that transmitting-receiving station 1 determines the flow chart of an example of binding pattern action again.Figure 14 is by Figure 11 Shown in the step S31 of flow chart replace with the figure of step S61.Transmitting-receiving station 1 the step of determining the action of binding pattern again In S61, the number i of the combination frame generated by combination processing is set as will be by the combination frame that current combination processing generates Number adds 1 value.The number of the combination frame generated by current combination processing is step S46, S47 and S48 shown in Figure 12 The number of the combination frame of middle generation.In the case where the number of the combination frame generated by current combination processing is set as n, in step In S61, it is set as i=n+1.Due to the step S32 to S37 after step S61 processing be with the step S32 shown in Figure 11 extremely The identical processing of S37, and the description is omitted.
In addition, sometimes in the time point for starting to act shown in Figure 14, the combination frame generated by current combination processing Number be and maximum value to constitute the identical number of number of the fixed cycle frame of fixed cycle frame group.In this case, transmitting-receiving station 1 Without the decision again of binding pattern, and use and current identical binding pattern, continue the sending action of fixed cycle frame The action that will be generated and send in conjunction with frame.That is, determining binding pattern again in step S51 of the transmitting-receiving station 1 not shown in Figure 12 And it is back to step S41, continue to act.
In the following, the action using Figure 15 to being executed in step S52, specifically, determining binding pattern again and making The action that the number of the combination frame generated by combination processing tails off compared with current illustrates.
Figure 15 is to indicate that transmitting-receiving station 1 determines the flow chart of an example of binding pattern action again.Figure 15 is by Figure 11 Shown in the step S31 of flow chart replace with step S61a, and step S35 and S37 are replaced with into step S35a and S37a Figure.Transmitting-receiving station 1 is in the step S61a of action for determining binding pattern again, by the number of the combination frame generated by combination processing I is set as subtracting 1 value by current combination processing from the number of the combination frame generated.It will given birth to by current combination processing At combination frame number be set as n in the case of, in step S61a, be set as i=n-1.Due to the step S32 after step S61 Processing to S34 and S36 be with shown in Figure 11 step S32 to S34 and the identical processing of S36, and the description is omitted.Transmitting-receiving station Whether 1 in step S35a, be 1 to confirm to i, (the step S35a in the case where i is 1：Yes), combination processing will be passed through The number of the combination frame of generation is determined as i i.e. 1 (step S36).On the other hand, it is not 1 in i, i.e. i is the integer more than or equal to 2 In the case of (step S35a：No), transmitting-receiving station 1 subtracts 1 (step S37a) from i, is back to step S32 and continues to act.
In addition, at the time point for starting action shown in figure 15, pass through the number for the combination frame that current combination processing generates Sometimes it is minimum value, as 1.In this case, again decision of the transmitting-receiving station 1 without binding pattern, and use and current phase Same binding pattern continues the action that the sending action of fixed cycle frame will be sent in conjunction with frame generation.That is, transmitting-receiving station 1 is not Again binding pattern is determined in step S52 shown in Figure 12 and is back to step S41, continues to act.
Figure 16 is an example of the action for indicating number change of the transmitting-receiving station 1 by the combination frame generated by combination processing Figure.Horizontal axis shown in Figure 16 is to send frame cumulative number to send accumulated time, and the longitudinal axis is frame error ratio.It is suitable to send accumulated time Pass through the time after being acted shown in beginning Figure 12.As shown in figure 16, transmitting-receiving station 1 reaches by network in frame error ratio or is (it is equivalent to the case where being determined as " Yes " in the step S49 of Figure 12) in the case of the upper limit i.e. the 1st threshold value as defined in system etc., again It determines binding pattern and will be reduced in conjunction with frame number.In addition, transmitting-receiving station 1 is in the case where frame error ratio reaches as defined in network or system etc. (it is equivalent to the case where being determined as " Yes " in the step S50 of Figure 12) in the case of limit i.e. the 2nd threshold value, determines binding pattern again And it will increase in conjunction with frame number.In addition, in general, majority only provides the upper limit of frame error ratio, without providing lower limit.In this case, The lower limit set of frame error ratio can also be arbitrary by the user of transmitting-receiving station 1.
As described above, the transmitting-receiving station 1 of present embodiment and by combination processing generate combination frame number accordingly, in advance It determines multiple fixed cycle frames execution combination processing to being sent to network with same period and generates the knot in conjunction with the case where frame The candidate of syntype, from the candidate determined, based on the situation after using the binding pattern of each candidate to send combination frame Frame error ratio determines the binding pattern actually used.In addition, being monitored to frame error ratio, reached in frame error ratio To being judged as needing the change of binding pattern in the case of preset threshold value, the binding pattern used is changed to combine mould Any one of candidate of formula is changed to for the knot pre-determined in conjunction with the number of frame each generated by combination processing Any one of syntype.By the composition for being set as binding pattern being suitably changed based on frame error ratio, can make transmission Efficiency improves.In addition, by the way that used binding pattern to be set as to the number for the combination frame each generated by combination processing And pre-determined composition, required load is handled so as to decision when mitigating change binding pattern, and can be real Now shorten required time when change binding pattern.
In addition, the transmitting-receiving station 1 of present embodiment to generate N number of combination frame the case where binding pattern predetermine Processing in, for each combination of the fixed cycle frame for generating N number of combination frame all combined, calculate N number of knot of generation The size for closing the maximum sized combination frame in frame, by the generation combination frame corresponding with minimum dimension in calculated size Combination is determined as binding pattern.Thereby, it is possible to avoid the size of the maximum combination frame of size in the combination frame generated from must not Strategic point is excessive.That is, by fixed cycle frame in conjunction with and send in the case of can prevent frame error ratio from unnecessarily excessively increasing Greatly, further increasing for transmission efficiency can be realized.
In the present embodiment, it is set as frame error ratio being compared with threshold value, to whether needing the change of binding pattern Judged.But be to be sent with the fixed cycle in conjunction with frame, in addition, if it is determined that go out binding pattern, then can also determine every The minimum value for the combination frame that 1 period sends, so if know the number for the combination frame that every 1 period sends, then it also can be to frame Whether error rate is high to be judged.That is, every 1 period send combination frame number quantity more than in the case of, can be judged as Frame error ratio is high, in the case where the combination frame number of storage is few, can be judged as that frame error ratio is low.Therefore, replace frame error ratio Threshold value, transmitting-receiving station 1 can also set relative to per set time send in conjunction with frame sum or as transmission mistake and again The threshold value of the sum of the combination frame of transmission.
Embodiment 2.
The transmitting-receiving station of embodiment 1 is only combined processing using fixed cycle frame as object, generates and combines frame.With this phase Right, the transmitting-receiving station of present embodiment is also using on-fixed periodic frame as the object of combination processing.In addition, the transmitting-receiving of present embodiment The composition stood is identical as the transmitting-receiving station of embodiment 1, and it is different to generate the action part sent in conjunction with frame.In this implementation In mode, a pair action different from embodiment 1 illustrates.
Figure 17 is the flow chart for the frame sending action carried out by transmitting-receiving station for indicating embodiment 2.It is handled shown in Figure 17 In, step coding that is identical as the Figure 12 illustrated in embodiment 1 it is identical as processing shown in Figure 12.About identical as Figure 12 The step of the processing that encodes omit the description.
As shown in figure 17, the transmitting-receiving station 1 of present embodiment is other than the processing of the step S41 to S52 shown in Figure 12, also Execute step S53 and S54.
The transmitting-receiving station 1 of present embodiment is in step S45, if it is determined that on-fixed periodic frame to be sent is not Gao You First grade (step S45：No), then to being confirmed (step S53) with the presence or absence of the combination frame that on-fixed periodic frame can be made to combine. Determination method of the narration below with the presence or absence of the combination frame that can make the combination of on-fixed periodic frame.All in the presence of on-fixed can be made (step S53 in the case of the combination frame that phase frame combines：Yes), transmitting-receiving station 1 by on-fixed periodic frame and fixed cycle frame in conjunction with and It sends (step S54).(the step S53 in the case where can not make the combination frame of on-fixed periodic frame combination：No), first, Transmitting-receiving station 1 will be sent in conjunction with frame, and after combining being sent completely of frame, on-fixed periodic frame is sent (step S48).
Herein, the side in the presence of the combination frame that on-fixed periodic frame can be made to combine is determined whether to transmitting-receiving station 1 using Figure 18 Method illustrates.
It shows in the example shown in Figure 18, in transmitting-receiving station 1, with fixed cycle frame 120, on-fixed periodic frame 130, consolidates Fixed cycle frame 121, fixed cycle frame 122, fixed cycle frame 123 ... and fixed cycle frame 129 is sequentially generated frame, will tie Close the case where frame 40 to 43 is sent in order, and the state to combining frame 40 to complete to send.
In the state shown in figure 18, transmitting-receiving station 1 selects the shortest combination frame of frame length in the combination frame that does not send It selects, combination frame 44 of the on-fixed periodic frame 130 further combined in the case of of sening as an envoy to is calculated relative to the combination frame selected Frame length (action for being equivalent to the S81 of Figure 18).Then, transmitting-receiving station 1 is to the longest combination frame of frame length in the combination frame that does not send It is selected and (is equivalent to the action of the S82 of Figure 18), the frame length for the combination frame 42 for combining the frame length of frame 44 and selecting is carried out Compare, in the case where combining the frame length of frame 42 longer, that is, exists compared with the combination frame 44 comprising on-fixed periodic frame 130 In the case of the longer combination frame of frame length, it is judged as that (action for being equivalent to the S83 of Figure 18) can be combined.With other statements to figure Action shown in 18 illustrates, and transmitting-receiving station 1 finds out the maximum combination frame of frame length and minimum knot in the combination frame not sent The difference for closing the frame length between frame, in the case of the poor bigger compared with the frame length of on-fixed periodic frame found out, being judged as can be with Combination frame relative to frame length minimum combines on-fixed periodic frame.
In addition, as other sides to being judged with the presence or absence of the combination frame that on-fixed periodic frame can be made to combine Method, transmitting-receiving station 1 can also be in the combination frames not sent, if meeting " (in conjunction with the frame length of frame)+(frame of on-fixed periodic frame It is long)<(the maximum frame length in the frame length for respectively combining frame generated by current binding pattern) ", then be judged as to combine.
As described above, the transmitting-receiving station 1a of present embodiment by fixed cycle frame in conjunction with and when sending, to whether there is The on-fixed periodic frame that fixed cycle frame combines can be confirmed, the case where there are combinable on-fixed periodic frames Under, with fixed cycle frame in conjunction with and send.As a result, other than the effect obtained in embodiment 1, also obtain to cut down non- The effect of the propagation delay time of fixed cycle frame.
Embodiment 3.
The transmitting-receiving station of embodiment 1,2 based on by fixed cycle frame in conjunction with and the frame error ratio of combination frame that generates, to making Binding pattern is determined.In contrast, the transmitting-receiving station of present embodiment will be tested when being determined to binding pattern Frame sends and finds out frame error ratio, is determined to the binding pattern used based on the frame error ratio found out.In addition, this reality The composition for applying the transmitting-receiving station of mode is identical as the transmitting-receiving station of embodiment 1,2, determines that an action part for binding pattern is different. In present embodiment, a pair action different from embodiment 1,2 illustrates.
Figure 19 is the figure of the transmitting-receiving station for indicating application implementation mode 3 and an example of the network formed.Shown in Figure 19 Network is formed by the transmitting-receiving station 1A to 1F as transmitting-receiving station of embodiment 3, and each transmitting-receiving station is towards the direction represented by arrow The communication frames such as fixed cycle frame 4A, on-fixed periodic frame are sent to the direction of transmitting-receiving station 1A to 1B, 1C, 1D, 1E, 1F.In addition, If each transmitting-receiving station is transferred from other transmitting-receiving station receiving frames.
Herein, action is illustrated by taking transmitting-receiving station 1D as an example.Frame is combined in the fixed cycle frame that transmitting-receiving station 1D is sent Frame error ratio be more than above-mentioned 1st threshold value, in the case of the necessity for generating change binding pattern, transmitting-receiving station 1D is to transmitting-receiving station 1E Send test frame 80.
As test frame 80, transmitting-receiving station 1D generates the binding pattern generated in the initial actuating illustrated in the embodiment 1 Candidate in, the frame of identical with the candidate for combining frame number fewer than the binding pattern in currently used frame length.In addition, transmitting-receiving station 1D is to information such as test frame additional identification numbers so that it is test frame that the transmitting-receiving station received, which can recognize,.It is receiving and dispatching It stands in 1D, transmission frame generating unit 19 that can be as shown in Figure 4 generates test frame 80, can also be given birth to by binding pattern determination section 14 At.It can also be the other composition that the test frame generating unit for generating test frame 80 is set.That is, sending frame generating unit 19, knot Syntype determination section 14 or test frame generating unit constitute test frame generation unit.
The decision of binding pattern with same order shown in Figure 14 to carry out.That is, the step S32 shown in Figure 14 In, start to generate test frame and the action of transmission.In addition, generating change binding pattern to being got higher along with frame error ratio The case where necessity, is illustrated, but be lower along with frame error ratio and generate change binding pattern necessity the case where Under, test frame can also be sent in the same manner and find out frame error ratio.
Figure 20 is to indicate that the transmitting-receiving station of embodiment 3 sends the figure of an example of the action of test frame.Shown in Figure 20 Our station action is the action of transmitting-receiving station 1D shown in Figure 19, and neighbor stations action is the action of transmitting-receiving station 1C or 1E.In fig. 20, it receives Hair station 1E executes step S94 and S95, and transmitting-receiving station 1C executes step S96.
It is i.e. adjacent to other stations if starting binding pattern decision action (step S91) as the transmitting-receiving station 1D of our station It stands and whether is sending fixed cycle frame and judged (step S92), will be surveyed if other stations are without sending fixed cycle frames Examination frame is sent to the transmitting-receiving station 1E (step S93) as the 1st neighbor stations.Transmitting-receiving station 1D repeats the transmission of test frame.As The transmitting-receiving station 1E of 1st neighbor stations returns reception result (step S95) if being received (step S94) to test frame. In the example of Figure 20, transmitting-receiving station 1E is detected the frame mistake of test frame, asks to retransmit in step S95.
As the transmitting-receiving station 1C of the 2nd neighbor stations, if as the timing of fixed cycle frame is sent, fixed cycle frame is sent out (step S96) is sent, the transmitting-receiving station 1D received to it stops the transmission (step S97) of test frame.In step S96, have When send multiple fixed cycle frames.Transmitting-receiving station 1D is at the time point for having received fixed cycle frame, due to there is no decision binding pattern, Therefore the fixed cycle frame received is sent with the minimum combination frame of conjugation, that is, do not make fixed cycle frame in conjunction with and It is sent (step S98).Alternatively, transmitting-receiving station 1D can also by fixed cycle frame in conjunction with and generate in conjunction with frame, send and combine frame So that the test frame and frame length that send before become identical.If transmitting-receiving station 1D terminates the transmission in conjunction with frame, restart The transmission (step S99) of test frame.Later, transmitting-receiving station 1D calculates frame error ratio based on the number for retransmiting test frame (step S100).In addition, decision of the calculated frame error ratio for binding pattern is handled.Until transmitting-receiving station 1D is to binding pattern It is determined, the transmission of retest frame and the calculating of frame error ratio.
As described above, the transmitting-receiving station of present embodiment is the case where the change for needing binding pattern is determined again Under, test frame is sent, the required frame error ratio of decision of binding pattern is found out.As a result, in addition to obtaining in embodiment 1,2 Following effect is also obtained except effect, that is, it can will shorten up to the time for obtaining frame error ratio compared with embodiment 1,2, It can will shorten up to the required time of decision binding pattern,
To realizing that the hardware of the transmitting-receiving station illustrated in each embodiment illustrates.Figure 21 is illustrated in embodiment 1 to 3 Transmitting-receiving station hardware structure diagram.
Processing circuit 200 is configured to include processor 201, memory 202 and telecommunication circuit 203.Processor 201 is CPU (Central Processing Unit, central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, Processor, also referred to as DSP), system LSI (Large Scale Integration) etc..Memory 202 is RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), it is EEPROM (Electrically Erasable Programmable Read-Only Memory) etc., non- Volatibility or volatile semiconductor memory, disk, floppy disk, mini disk, mini-disk or DVD (Digital Versatile Disc) etc..Telecommunication circuit 203 is network interface card etc..
Frame sending part 11, frame engaging portion 13, binding pattern determination section 14, the frame for constituting the transmitting-receiving station of embodiment 1 to 3 are wrong Error detection portion 15, in conjunction with frame cutting part 16, frame determination unit 17, send frame generating unit 19, frame error ratio calculating part 20, frame mistake threshold Be worth configuration part 22 and frame response portion 23 can be by reading corresponding with each program by processor 201 from memory 202 It executes to realize.Transmission buffer 18 and reception buffer 21 can be realized by memory 202.In addition communication unit 12 can be by leading to Believe that circuit 203 is realized.
In addition, frame sending part 11, frame engaging portion 13, binding pattern determination section 14, Framing Error Detection portion 15, in conjunction with frame divide Portion 16, sends frame generating unit 19, frame error ratio calculating part 20, frame error thresholds configuration part 22 and frame response portion at frame determination unit 17 Part or all of 23 can also be realized by dedicated hardware.In this case, above-mentioned each portion by be, for example, single circuit, Compound circuit, be programmed after processor, the processor by after sequencing in parallel, ASIC (Application Specific Integrated Circuit), FPGA (Field Programmable Gate Array) or by they combine processing electricity It realizes on road.
An example it is merely meant that present disclosure is constituted shown in above embodiment, can combine others A part for structure can also be omitted, be changed to the prior art in the range for the purport for not departing from the present invention.
The explanation of label
1,1A, 1B transmitting-receiving station, 11 frame sending parts, 12 communication units, 13 frame engaging portions, 14 binding pattern determination sections, 15 frames are wrong Error detection portion, 16 combine frame cutting part, and 17 frame determination units, 18 transmission buffers, 19 send frame generating unit, and 20 frame error ratios calculate Portion, 21 receive buffer, 22 frame error thresholds configuration parts, 23 frame response portions.

Claims (9)

1. a kind of communication device, which is characterized in that have：
Transmission unit, execute by the identical multiple fixed cycle frames of sending cycle combine and generate be greater than or equal to 1 communicate The communication frame is sent to network by the combination processing of frame；And
Error count unit counts communication mistake caused by the communication frame,
If the count value of the communication mistake obtained by the error count unit reaches threshold value, the transmission unit makes The number for the communication frame that the combination processing is generated each time increases.
2. communication device according to claim 1, which is characterized in that
If the count value of the communication mistake is less than or equal to 2nd threshold value lower than the 1st threshold value as the threshold value, institute Stating transmission unit makes the number of the communication frame generated by the combination processing reduce.
3. communication device according to claim 1 or 2, which is characterized in that
The communication device has binding pattern determining means, the object of the binding pattern determining means based on the combination processing The size of each of the fixed cycle frame, to indicating the transmission unit by the combination processing in conjunction with the fixed week The binding pattern of combination when phase frame is predetermined.
4. communication device according to claim 3, which is characterized in that
The binding pattern determining means pair is being to be more than or wait with the number of communication frame caused by the combination processing each time In 2 the corresponding binding pattern of Integer N determined in the case of,
For each combination of the fixed cycle frame for generating N number of communication frame by the combination processing all combined, meter The size for calculating the maximum sized communication frame in the N number of communication frame generated, by calculated size, generation and minimum ruler The combination of very little corresponding communication frame is set as the binding pattern in the case of generating N number of communication frame by the combination processing.
5. communication device according to any one of claim 1 to 4, which is characterized in that
The transmission unit is in the communication frame and without determining that the on-fixed periodic frame of sending cycle is state to be sent In the case of, if the on-fixed periodic frame is high priority, the on-fixed periodic frame is sent out before the communication frame It send, if the on-fixed periodic frame is not high priority, the on-fixed periodic frame is sent after the communication frame.
6. communication device according to any one of claim 1 to 4, which is characterized in that
The transmission unit is in the communication frame and without determining that the on-fixed periodic frame of sending cycle is state to be sent In the case of, if the on-fixed periodic frame is high priority, the on-fixed periodic frame is sent out before the communication frame Send, if the on-fixed periodic frame is not high priority, to whether the on-fixed periodic frame can be incorporated into it is described Communication frame and send and judged, can in conjunction with and in the case of send, by the on-fixed periodic frame and the communication frame In conjunction with and send, can not in conjunction with and in the case of send, the on-fixed periodic frame is sent after the communication frame.
7. communication device according to any one of claim 1 to 6, which is characterized in that
The communication device has test frame generation unit, which generates and generated by the combination processing The frame of the identical size of the communication frame as test frame,
In the case where the communication mistake that the error count unit counts out reaches threshold value,
The transmission unit sends the test frame that the test frame generation unit generates, and is based on the error count list The count results of the communication mistake of member, change the number of the communication frame caused by the combination processing each time,
The error count unit is to communication mistake caused by communication mistake caused by the communication frame and the test frame It is counted.
8. communication device according to any one of claim 1 to 6, which is characterized in that
The communication device has test frame generation unit, which generates and generated by the combination processing The frame of the identical size of the communication frame as test frame,
In the case where the communication mistake that the error count unit counts out reaches threshold value,
The transmission unit sends the test frame that the test frame generation unit generates, and is based on the error count list The count results of the communication mistake of member, change the number of the communication frame caused by the combination processing each time,
The error count unit replace communication mistake caused by the communication frame and to being communicated caused by the test frame Mistake is counted.
9. a kind of frame sending method, which is characterized in that include：
Frame generation step, by multiple fixed cycle frames in conjunction with and generate be greater than or equal to 1 communication frame；
The communication frame generated in the frame generation step is sent to network by forwarding step；
Error count step counts communication mistake caused by the communication frame that is sent out in the forwarding step； And
It generates frame number and changes step, if the count value of the communication mistake in the error count step reaches threshold value, The number of the communication frame generated in the frame generation step is set to increase.
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