CN108605040B - Communication device and frame sending method - Google Patents

Communication device and frame sending method Download PDF

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Publication number
CN108605040B
CN108605040B CN201680081062.7A CN201680081062A CN108605040B CN 108605040 B CN108605040 B CN 108605040B CN 201680081062 A CN201680081062 A CN 201680081062A CN 108605040 B CN108605040 B CN 108605040B
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frame
communication
transmitting
combination
binding pattern
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CN108605040A (en
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住田崇史
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Mitsubishi Corp
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Mitsubishi 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, executing and the identical multiple fixed cycle frames of sending cycle are combined and generate the combination processing more than or equal to 1 communication frame, communication frame is sent to network；Frame transmission unit (11) and communication unit (12)；And the frame error ratio calculation 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 to increase by the number of combination processing communication frame generated.

Description

Communication device and frame sending method
Technical field
The present invention relates to the communication frame progress except the communication frame periodically sent i.e. fixed cycle frame and fixed cycle frame The communication device and frame sending method of transmission.
Background technique
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, the occurrence frequency for transmitting mistake rises, and the frequency retransmited increases if communication frame becomes large-sized 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 sending data using multiple communication frames of small size Under, ratio shared by the 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 Crossing can be such that transmission efficiency mentions using communication frame as large-sized as possible in the range of the probability of happening of transmission mistake does not rise It is high.In addition, not needing being sent completely for communication frame in the case where sending multiple communication frames in conjunction with and as 1 communication frame Waiting time 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 the communication frame for the state of inquiring with the fixed cycle to each control object equipment.In addition, what control device had Communication device the case where making control object equipment start certain movement, in the feelings for making control object equipment stop movement in execution Condition etc. sends the communication for indicating request content to control object equipment arbitrarily periodically to issue 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.The data separation of transmission is to be sent out with the fixed cycle by communication device documented by patent document 1 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 where 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 bulletin
Summary of the invention
There are the following problems in the invention documented by 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, reach purpose, the present invention has: transmission unit executes sending cycle is identical Multiple fixed cycle frames in conjunction with and generate be greater 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 increases the number of combination processing communication frame generated each time.
The effect of invention
Communication device of the present invention has the effect of that transmission efficiency can be made to improve.
Detailed description of the invention
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 the movement for indicating to send communication frame as the transmitting-receiving station of communication device in the communication system of embodiment 1 Summary figure.
Fig. 3 is action example in the case where indicating to occur in the communication system of embodiment 1 the transmission mistake of communication frame Figure.
Fig. 4 is the figure for indicating the configuration example of the transmitting-receiving station as communication device of embodiment 1.
Fig. 5 is the flow chart for indicating the sending action of embodiment 1 carried out by transmitting-receiving station.
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 movement 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 movement 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 movement after binding pattern.
Figure 13 is the figure for indicating an example of the frame sending action carried out by transmitting-receiving station for embodiment 1.
Figure 14 is to indicate that the transmitting-receiving station of embodiment 1 determines the flow chart of an example of the movement 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 movement 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 indicating the frame sending action of embodiment 2 carried out by transmitting-receiving station.
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 for the method that row determines.
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 movement of test frame.
Figure 21 is the hardware structure diagram of the transmitting-receiving station of embodiment 1 to 3.
Specific embodiment
In the following, being based on attached drawing, the communication device be related to embodiments of the present invention and frame sending method are carried out specifically It is bright.In addition, the present invention is not limited by present embodiment.
Embodiment 1.
Firstly, being illustrated using communication system of the Fig. 1 to Fig. 3 to application communication device of the present invention.
Fig. 1 is the figure for indicating an example of the communication system realized using communication device of the present invention.
Fig. 1 is shown to be constituted 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 the 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., being judged as the communication frame sent in the case where needing to send from transmitting-receiving station 1A.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 movement 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 equal to 2 communication frames and is sent as 1 communication frame.In the present specification, communication frame obtained from combination processing will be executed to claim For in conjunction with 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 In the case that a communication frame combines frame to send, when not needing the necessary transmission waiting between communication frame continuously transmitted Between, the waiting time 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 communication mistake, that is, communication frame transmission mistakes The problem of probability of happening rises.In addition, being provided in a network sometimes, so that the incidence of transmission mistake is no more than fixation Value.In view of these situations, transmitting-receiving station 1A is thought of as, so that the probability of happening of transmission 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 can also 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 1 fixed cycle frame not in conjunction with other fixed cycle frames, but in various embodiments, it is for convenience of explanation, right 1 fixed cycle frame not in conjunction 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, in conjunction with transmission error rate of frame etc., 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 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 where the transmission mistake of communication frame.In Fig. 3 institute In the example shown, transmitting-receiving station 1A sends 3 and combines frame 40,41 and 42.If transmitting-receiving station 1B is normally received in conjunction with frame, ACK (Acknowledgment) frame of the response normally received as expression is returned.In the example shown in Fig. 3, transmitting-receiving station 1B is normally received in conjunction with frame 40 and 41, and the ACK frame 50 and 51 relative to them is sent back to transmitting-receiving station 1A.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 frame Condition is detected.Comprising indicating it is the information which is combined the received ACK frame of frame relative in ACK frame.Transmitting-receiving station 1A exists It sends after combining frame, in the case where being not received by ACK frame within the set time, retransmits and the ACK frame pair that does 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 frame 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 frame 52 is 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 conjunction with the no arrival transmitting-receiving station 1B's of frame itself in the presence of as transmitting-receiving station 1B It example and is detected after combining frame to reach transmitting-receiving station 1B but by frame check sequence (FCS:Frame Check Sequence) 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 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 transmission unit 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 calculation part 20, Receive buffer 21, frame error thresholds configuration part 22 and frame response portion 23.
Firstly, being illustrated to the relevant constituting portion of reception movement to communication frame.
Communication unit 12 receives combination frame, on-fixed periodic frame or ACK frame as track data from network line, will Combination frame, on-fixed periodic frame or ACK frame after reception are exported to Framing Error Detection portion 15.
Framing Error Detection portion 15, which is directed to, detects 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 The identification number of the combination frame or on-fixed periodic frame that have detection to make mistake is collectively notified frame transmission unit 11.Receive the notice Frame transmission unit 11 will be attached with the receipts of the ACK frame 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.Framing Error Detection portion 15 not will test 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 that will test the combination frame or on-fixed periodic frame that make mistake is notified to frame transmission unit 11.Therefore, not from communication ACK frame is returned to the transmitting-receiving station for the transmission source for combining frame or on-fixed periodic frame in portion 12.
In addition, Framing Error Detection portion 15 be not detected relative to combine frame ACK frame mistake in the case where, will be attached The identification number for being added on ACK frame 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 where detecting the mistake relative to the ACK frame 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 transmission unit 11 is sent out from frame transmission unit 11, based on acquirement Rear identification number and the identification number for being additional to the ACK frame being successfully received notified from Framing Error Detection portion 15, to whether Frame transmission unit 11 will be then forwarded in conjunction with frame by, which needing, determines.Specifically, frame response portion 23 is sent from frame transmission unit 11 In conjunction with frame to during passing through certain time, do not notifying from Framing Error Detection portion 15 to the combination sent from frame transmission unit 11 In the case where the identification number of frame, it is judged as and needs to be combined retransmiting for frame.Frame response portion 23 needs to carry out being judged as In the case where in conjunction with the retransmiting of frame, the identification number of the combination frame retransmited is notified to frame transmission unit 11, it is right It retransmits and is indicated.The frame transmission unit 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 transmission unit 11 from frame transmission unit 11, Then the timer starts the counting of certain time, if notifying the combination frame sent by frame transmission unit 11 from Framing Error Detection portion 15 Identification number, then the timer stop count, timer expire in the case where be judged as that needs retransmit.Frame response portion 23 It combines frame to during passing through certain time sending from frame transmission unit 11, is notifying to from frame to send from Framing Error Detection portion 15 In the case where 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 transmission unit 11 in conjunction with frame to process During certain time, the identification number to the combination frame sent from frame transmission unit 11 is not being notified from Framing Error Detection portion 15 In the case where, 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 having 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 restore each fixed cycle frame 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 save to from the fixed cycle frame and on-fixed periodic frame for combining frame cutting part 16 to input. The fixed cycle frame and on-fixed periodic frame for receiving the preservation of buffer 21 are read by the application of illustration omitted etc. for needing these frames. In addition, having received frame for not being destined to our station etc. in reception buffer 21, needing to transfer to the case where 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, being illustrated to constituting portion relevant to 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 where, 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 Determine that result and calculated frame length are exported to binding pattern determination section 14, and frame will be sent and exported to transmission buffer 18. Herein, frame determination unit 17 indicates that sending frame meets fixed cycle frame and on-fixed week inserted with frame category in the frame head for sending frame Which determined in the case where information of phase frame by reading the information.Frame category can also be not inserted into transmission frame Frame head and as data packet contained in send frame.In addition, in the transmission by timesharing fixed cycle frame and on-fixed periodic frame It can also periodically be determined according to the time of transmission in independent situation.
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 saved.
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 calculation part 20, to by transmission buffer 18 Save each fixed cycle frame binding pattern, the fixed cycle frame being combined combination and by fixed cycle frame combination when The sequence of each fixed cycle frame determined, determination result is exported to frame engaging portion 13.Herein, binding pattern determination section 14 The change of fixed cycle frame inside in the case where carry out sequence can also be not present in the information for the sequence for indicating 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 for indicating the sequence of script of 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 where, 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 movement of the case where binding pattern of 14 decision fixed cycle frames is illustrated.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 calculation part 20 export.
If by the way that whether the transmission that binding pattern determination section 14 inputs each combination frame successful and identification number, frame mistake Rate calculation part 20 stores it, and calculates the frame error ratio for combining frame.Frame error ratio can be by with transmission It is calculated in conjunction with the total number of frame divided by the number of the transmission failure in conjunction with frame.If frame error ratio calculation part 20 calculates Frame error ratio then exports calculated result to binding pattern determination section 14.In addition, being set as determining via binding pattern in Fig. 4 By each transmission in conjunction with frame that frame response portion 23 exports, whether successful and identification number is exported to frame error ratio calculation part 20 in portion 14, But it also can be set to the composition that slave frame response portion 23 is directly exported to frame error ratio calculation part 20.The frame error ratio calculation 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 saved Fixed cycle frame combines.Frame engaging portion 13 is defeated to frame transmission unit 11 by the combination frame for executing the combination processing of fixed cycle frame and generating Out.At this point, each combination frame additional identification number of the 13 pairs of output in frame engaging portion.
Frame transmission unit 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 transmission unit 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 with frame engaging portion 13 together.
Then, illustrate part or all of combination of the multiple fixed cycle frames sent by transmitting-receiving station 1 with same period And the movement sent.
Fig. 5 is the flow chart for indicating the sending action carried out by transmitting-receiving station 1.In the sending action carried out by transmitting-receiving station 1, As shown in figure 5, carrying out the collection of information required for sending action as initial actuating, specifically obtains and combine 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 of the execution of transmitting-receiving station 1. In the initial actuating carried out by transmitting-receiving station 1, firstly, obtaining the information (step S11) of fixed cycle frame.Fig. 7 shows fixed week The information of phase frame.Fig. 7 is an example for indicating the information of fixed cycle frame.Determined by binding pattern determination section 14 from frame The frame that portion 17 exports determines that result is parsed and 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 of the frame length of each of the fixed cycle frame 124 to 128 of fixed cycle frame group long 60 to 64.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 for indicating the information collection movement of the fixed cycle frame carried out by binding pattern determination section 14 Flow chart.Whether binding pattern determination section 14 is to fixed cycle frame is detected, specifically, if be notified of from frame determination unit 17 Indicate that the judgement result of fixed cycle frame is monitored (step S21), in the case where detecting fixed cycle frame (step S21: Yes), (step S22) is stored to the type and size i.e. frame length of the fixed cycle frame detected.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 type to these fixed cycle frames, identification if it is the information that can distinguish fixed cycle frame Other information except number is stored.
Binding pattern determination section 14 (step S21:No) and performs step in the case where fixed cycle frame is not detected In the case where rapid S22, confirm to whether have passed through the stipulated time after the information collection movement for starting fixed cycle frame.In Not by (step S23:No) in the case where the stipulated time, it is back to step S21 and continues with.It will be set as stipulated time than solid The sending cycle of the fixed cycle frame long time.The sending cycle of fixed cycle frame is set as preparatory by the system of application transmitting-receiving station 1 The period of imagination.In the case where have passed through the stipulated time (step S23:Yes), binding pattern determination section 14 is until by rule The type and size of the fixed cycle frame 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 and the time interval to the fixed cycle frame for detecting identical type calculates.In addition, being sent at each all 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.Above-mentioned fixed week is equivalent 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 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 limit 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.It is raw to binding pattern determination section 14 referring to Fig. 9 and Figure 10 It is illustrated at the movement 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 movement 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 closing number the case where be 1 (in conjunction with rear frame number: 1 the case where) of frame, be 2 ..., the case where being N, generation expression one by one will be each 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 group included fixed cycle frame number N and identical number.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 where 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 14 pairs of binding pattern determination section execution combination processings and generating is 2 The figure of one example of the movement 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, 14 pairs of binding pattern determination section knots Frame length AAbyte, BBbyte after conjunction are calculated, and big conduct longest frame length is stored.In Figure 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 each the frame length CCbyte and DDbyte in conjunction with frame generated are calculated, and are stored to big.In addition, binding pattern Determination section 14 is directed to the mode 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 It is respectively calculated in conjunction with the frame length EEbyte and FFbyte of frame, 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 where 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 of combination frame that 14 pairs of portion executes combination processing and generates 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 mode 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 The smallest group there are can also distribute in the case where multiple to arbitrarily adding up to smallest size of 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 combining these 7 fixed cycle frames and the candidate of binding pattern the case where generate 3 in conjunction with frame is determined Fixed movement.
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
Firstly, 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 3rd long frame E (frame length=45) is allocated in the 3rd group.At the time point, it is allocated in The frame of 1st group to the 3rd group of each adds up to having a size of 60,50,45.Then, the frame that binding pattern determination section 14 is grown the 4th G (frame length=40) is allocated in 3rd group the smallest 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 5th long frame D (frame length=30) is allocated in by binding pattern determination section 14 at the time point Add up to smallest size of 2nd group, 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 6th long frame B (frame length=25) is allocated in by mode determination section 14 at the time point adds up to smallest size of 1st group, is allocated in Total size of 1st group to the 3rd group of frame is respectively 85,80,85.Then, the frame A (frame that binding pattern determination section 14 is grown the 7th It is long by=20) it is allocated at the time point 2nd group the smallest, terminate the grouping of each fixed cycle frame.Then, binding pattern determination section 14 pairs of putting in order when each fixed cycle frame for being allocated in the 1st group to the 3rd group is combined by group and is generated in conjunction with frame, 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, binding pattern determination section 14 passes through by the binding pattern in conjunction with the case where fixed cycle frame, from size I.e. in sequence, that distributes to allocated fixed cycle frame adds up to smallest size of group to the big fixed cycle frame of frame length, thus Can export becomes the smallest binding pattern by the combination frame full-size that combination processing generates.
The above are the initial actuatings of step S1 shown in fig. 5.If transmitting-receiving station 1 terminates initial actuating, next, to knot Syntype is determined (step S2).
Determine that the movement of binding pattern is illustrated 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 movement.
For transmitting-receiving station 1, firstly, 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, the integer of the number for the fixed cycle frame that i, which is more than or equal to 1 and less than or equal to fixed cycle frame group, is included.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 movement (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 combine frame, frame transmission unit 11 is sent to via communication unit 12.Later, with regard to transmitting-receiving station 1 and Speech, it is standby to stipulated time (step S33:No) is passed through, if by stipulated time (step S33:Yes), according to generation i 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).Combining the frame error ratio of frame bigger and smaller than the 1st threshold value than the 2nd threshold value 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 In the case that threshold value is big and the range small than the 1st threshold value (step S34:No), to i whether with the fixed cycle frame in conjunction with object Number, which is that the number for the fixed cycle frame that fixed cycle frame group is included is equal, is confirmed (step S35).Transmitting-receiving station 1 is in i and combines In the case that the fixed cycle frame number of object is equal (step S35:Yes), combination frame that transmitting-receiving station 1 will be generated by combination processing Number be determined as i (step S36).(the step in the unequal situation of fixed cycle frame number of i and combination object of transmitting-receiving station 1 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 binding pattern out, the binding pattern that then transmitting-receiving station 1 starts to determine Communication i.e. with the binding pattern that determines by fixed cycle frame in conjunction with and the movement (step S3) that sends.It is determined by binding pattern Determine portion 14 and the binding pattern determined in above-mentioned steps S2 is notified to the movement for starting step S3 to frame engaging portion 13.Below Detailed content is described, in the movement of step S3, to whether the change of binding pattern being needed suitably to be confirmed, is needed being judged as In the case where 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 movement for indicating the transmitting-receiving station 1 after executing step S2 shown in fig. 5 and determining to binding pattern The flow chart of one example.Process shown in Figure 12 illustrates the detailed interior of movement 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 where (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 in the case where on-fixed periodic frame to be sent is not present 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 is judged as that there is no on-fixed periodic frames to be sent.There are the feelings of on-fixed periodic frame to be sent Under condition (step S42: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, for the transmission timing of fixed cycle frame (step S41:Yes), to the presence or absence of to be sent On-fixed periodic frame is confirmed (step S44).In the case where on-fixed periodic frame to be sent is not present (step S44: 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, each combination frame after generation is sent to network line.
There are on-fixed periodic frame to be sent (step S44: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 determined.It is Gao You in the priority of on-fixed periodic frame to be sent In the case where first grade (step S45:Yes), firstly, transmitting-receiving station 1 sends on-fixed periodic frame, it is complete in the transmission of on-fixed periodic frame Cheng Hou sends and combines frame (step S47).The movement 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, since the priority of on-fixed periodic frame 130 is high, transmitting-receiving station 1 sends on-fixed first Then periodic frame 130 is generated and is sent in conjunction with frame 40, ultimately produces in conjunction with frame 41 and send.On the other hand, to be sent non- The priority of fixed cycle frame is not that transmitting-receiving station 1 is sent first combines frame in the case of high priority (step S45:No), is being combined After being sent completely of frame, send on-fixed periodic frame (step S48).The movement 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 and sent in conjunction with frame 41, finally transmission on-fixed periodic frame 131.
It in Figure 12, is recorded though omitting, the case where transmitting-receiving station 1 executes step S46, S47 or S48 and has sent frame Under, whether the transmission for combining frame is successfully confirmed and stored.In addition, in the case where combining the transmission failure of frame, transmitting-receiving It stands 1 pair and sends the combination frame of failure and retransmit.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 and combining 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, then can be 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 determine, be judged to needing to become Again binding pattern (step S51, S52) is determined in the case where 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, reference Fig. 6), 2nd threshold value < the 1st threshold value relationship 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 also can be set 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 combined the dynamic of 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 movement of step S49 to S52 shown in Figure 12.
Transmitting-receiving station 1 makes the combination generated in the case where frame error ratio is less than or equal to 2 threshold value (step S49:Yes) 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 long compared with current Frame and sent also that there is no problem, determine binding pattern again and the number ratios of the combination frame generated by combination processing worked as It is preceding few.The number of the combination frame of generation, which is reduced, refers to that the number of the fixed cycle frame combined when generating 1 combination frame increases, 1 knot The frame length for closing frame is elongated.The movement for determining binding pattern again in step S52 is described below.Transmitting-receiving station 1 makes to execute step After rapid S52 and the number of combination frame generated are reduced, it is back to step S41 and continues to act.
Transmitting-receiving station 1 in the case where frame error ratio is bigger than the 2nd threshold value (step S49:No), whether frame error ratio is greater than or (step S50) is confirmed equal to the 1st threshold value, in the case where frame error ratio is smaller than the 1st threshold value (step S50:No), 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 Mode be the number of combination frame generated by combination processing be it is appropriate, be equivalent to the state for not needing to change binding pattern.It receives Hair station 1 increases the number of the combination frame generated in the case where frame error ratio is greater than or equal to 1 threshold value (step S50:Yes) (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 sends 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 Add the number reduction referred to generating the fixed cycle frame that 1 combines when combining frame, 1 combines the frame length of frame to shorten.Transmitting-receiving station 1 exists Make to execute step S51 after the number of the combination frame that generates increases, is back to step S41 and continues to act.
Using Figure 14, movement 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 movements compared with current and is illustrated.
Figure 14 is to indicate that transmitting-receiving station 1 determines the flow chart of an example of binding pattern movement 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 movement 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.As the step S32 to S37 after step S61 processing be with 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 movement shown in Figure 14, the combination frame generated by current combination processing Number be and maximum value the i.e. identical number of number of the fixed cycle frame of composition 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 movement 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 movement using Figure 15 to being executed in step S52, specifically, determining binding pattern again and making The movement that the number of the combination frame generated by combination processing tails off compared with current is illustrated.
Figure 15 is to indicate that transmitting-receiving station 1 determines the flow chart of an example of binding pattern movement 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 movement 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.The life of current combination processing will passed through At combination frame number be set as n in the case where, in step S61a, be set as i=n-1.Due to the step S32 after step S61 Processing to S34 and S36 is processing identical with step S32 shown in Figure 11 to S34 and S36, and and the description is omitted.Transmitting-receiving station Whether 1 in step S35a, be 1 to confirm to i, in the case where i is 1 (step S35a:Yes), will pass through combination processing The number of the combination frame of generation is determined as i i.e. 1 (step S36).It on the other hand, is not 1 in i, i.e. i is the integer more than or equal to 2 In the case where (step S35a:No), transmitting-receiving station 1 subtracts 1 (step S37a) from i, is back to step S32 and continues to act.
In addition, passing through the number for the combination frame that current combination processing generates at the time point for starting movement shown in figure 15 It sometimes 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 movement 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 for indicating the movement of 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 acting shown in beginning Figure 12.As shown in figure 16, transmitting-receiving station 1 reaches by network in frame error ratio or is (the case where being determined as " Yes " in the step S49 of Figure 12 is equivalent to) in the case where 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. (the case where being determined as " Yes " in the step S50 of Figure 12 is equivalent to) in the case where 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 any 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 that the multiple fixed cycle frames sent with same period to network are executed combination processing and generate 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 the change for needing binding pattern is judged as in the case where preset threshold value, the binding pattern used is changed to combine mould Any one of candidate of formula is changed to the knot pre-determined for the number of the combination frame each generated by combination processing Any one of syntype.By the composition for being set as suitably changing binding pattern based on frame error ratio, can make to transmit 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, so as to mitigate load required for decision processing when 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 where can prevent frame error ratio from unnecessarily excessively increasing Greatly, it can be realized further increasing for transmission efficiency.
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 binding pattern out, 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 determined.That is, every 1 period send combination frame number quantity more than in the case where, 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 become 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 for 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 movement a part sent in conjunction with frame.In this implementation In mode, the movement different from embodiment 1 is illustrated.
Figure 17 is the flow chart for indicating the frame sending action of embodiment 2 carried out by transmitting-receiving station.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, other than the processing of the transmitting-receiving station 1 of present embodiment 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) is then confirmed (step S53) to the presence or absence of the combination frame that on-fixed periodic frame can be made to combine. Determination method of the narration with the presence or absence of the combination frame that on-fixed periodic frame can be made to combine below.All in the presence of on-fixed can be made Phase frame combine combination frame in the case where (step S53:Yes), transmitting-receiving station 1 by on-fixed periodic frame in conjunction with fixed cycle frame and It sends (step S54).In the case where the combination frame that on-fixed periodic frame can not combined (step S53:No), firstly, 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 is illustrated.
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 The case where frame 40 to 43 is sent in order is closed, and to the state for combining frame 40 to complete transmission.
In the state shown in figure 18, transmitting-receiving station 1 selects the shortest combination frame of frame length in not sent combination frame It selects, calculates combination frame 44 of the on-fixed periodic frame 130 further combined in the case where of sening as an envoy to relative to the combination frame selected Frame length (movement for being equivalent to the S81 of Figure 18).Then, transmitting-receiving station 1 is to the longest combination frame of frame length in not sent combination frame It is selected and (is equivalent to the movement 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 longer situation of frame length for combining frame 42, that is, exists compared with the combination frame 44 comprising on-fixed periodic frame 130 In the case where the longer combination frame of frame length, (movement for being equivalent to the S83 of Figure 18) can be combined by being judged as.With other statements to figure Movement shown in 18 is illustrated, and transmitting-receiving station 1 finds out the maximum combination frame of frame length and the smallest knot in not sent combination frame The difference for closing the frame length between frame, the difference found out with the frame length of on-fixed periodic frame compared with more greatly in the case where, being judged as can be with On-fixed periodic frame is combined relative to frame length the smallest combination frame.
In addition, as to the other sides 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 not sent combination frames, if meeting " (in conjunction with the frame length of frame)+(frame of on-fixed periodic frame It is long) < (the maximum frame length in each frame length in conjunction with frame generated by current binding pattern) ", then being judged as can 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, it is sent in conjunction with fixed cycle frame.It other than effect, also obtains to cut down non-obtained in the embodiment 1 as a result, 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 determining to binding pattern Frame sends and finds out frame error ratio, is determined based on the frame error ratio found out to the binding pattern used.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 movement a part of binding pattern is different.In In present embodiment, the movement different from embodiment 1,2 is illustrated.
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 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, movement 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 where 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 having carried out received transmitting-receiving station to recognize being test frame.It is receiving and dispatching Stand in 1D, can transmission frame generating unit 19 as shown in Figure 4 generate test frame 80, can also be raw by binding pattern determination section 14 At.It is also possible to that the composition for generating the test frame generating unit of test frame 80 is in addition arranged.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 movement of transmission.In addition, generating change binding pattern to getting 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 movement of test frame.Shown in Figure 20 Our station movement is the movement of transmitting-receiving station 1D shown in Figure 19, and neighbor stations movement is the movement of transmitting-receiving station 1C or 1E.In Figure 20, receive 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 movement (step S91) as the transmitting-receiving station 1D of our station It stands and whether is sending fixed cycle frame and determined (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 Reception result is returned (step S95) if being received (step S94) to test frame by the transmitting-receiving station 1E of the 1st neighbor stations. In the example of Figure 20, transmitting-receiving station 1E detects the frame mistake of test frame, requests to retransmit in step S95.
As the transmitting-receiving station 1C of the 2nd neighbor stations, if becoming the timing for sending fixed cycle frame, fixed cycle frame is sent out (step S96) is sent, the transmission (step S97) that received transmitting-receiving station 1D stops test frame having been carried out to it.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 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, frame error ratio required for the decision of binding pattern is found out.As a result, in addition to obtained 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,
The hardware for realizing the transmitting-receiving station illustrated in each embodiment is illustrated.Figure 21 is illustrated in embodiment 1 to 3 Transmitting-receiving station hardware structure diagram.
Processing circuit 200 is configured to comprising 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 transmission unit 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 calculation part 20, frame mistake threshold Being worth configuration part 22 and frame response portion 23 can be and reading corresponding with each program from memory 202 by processor 201 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 transmission unit 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 calculation 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 contents of the present invention is constituted shown in above embodiment, can combine others The prior art also can be omitted, change a part of structure in the range for not departing from purport of the invention.
The explanation of label
1,1A, 1B transmitting-receiving station, 11 frame transmission units, 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 is executed the identical multiple fixed cycle frames of sending cycle to be based on the respective ruler of fixed cycle frame Very little combines in conjunction with and generates the combination processing for being greater than or equal to 1 communication frame, and the communication frame is sent to network；And
Error count unit counts communication mistake caused by the communication frame,
If the calculated frame error ratio of count value based on the communication mistake obtained by the error count unit reaches Threshold value, then the transmission unit increases the number of the combination processing communication frame generated each time.
2. communication device according to claim 1, which is characterized in that
If the frame error ratio is less than or equal to 2nd threshold value lower than the 1st threshold value as the threshold value, the transmission is single Member reduces the number of the communication frame generated by the combination processing.
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, it is all in conjunction with the fixation by the combination processing to the transmission unit is indicated Combined binding pattern when phase frame is predetermined.
4. communication device according to claim 3, which is characterized in that
The binding pattern determining means is to being to be greater 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 where,
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 where generating N number of communication frame by the combination processing.
5. communication device according to claim 1 or 2, which is characterized in that
The transmission unit is state to be sent in the communication frame and the on-fixed periodic frame without determining sending cycle 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 claim 1 or 2, which is characterized in that
The transmission unit is state to be sent in the communication frame and the on-fixed periodic frame without determining sending cycle 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 where 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 where send, the on-fixed periodic frame is sent after the communication frame.
7. communication device according to claim 1 or 2, 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 claim 1 or 2, 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 communication caused by the test frame Mistake is counted.
9. a kind of frame sending method, characterized by comprising:
Frame generation step, by multiple fixed cycle frames with the combination based on the respective size of fixed cycle frame in conjunction with and generate More than or equal to 1 communication frame；
The communication frame generated in the frame generation step is sent to network by sending step；
Error count step counts communication mistake caused by the communication frame sent out in the sending step； And
It generates frame number and changes step, if the count value based on the communication mistake in the error count step is calculated Frame error ratio reaches threshold value, then increases the number of the communication frame generated in the frame generation step.
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