CN109688066A - A kind of network interface filtration drive method based on GigE Vision - Google Patents
A kind of network interface filtration drive method based on GigE Vision Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/12—Avoiding congestion; Recovering from congestion
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- 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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
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- 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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/188—Time-out mechanisms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/80—Responding to QoS
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Abstract
The network interface filtration drive method based on GigE Vision that the invention discloses a kind of, include the following steps: that networks filter driver is installed, and pass through the filter criteria of networks filter driver log-on data frame in Windows kernel, the filter criteria includes the source address of data frame, the destination address of data frame, the transport-type of data frame and the port model of data frame, networks filter driver judges that each reaches whether the data frame of network interface meets filter criteria, if, data frame is then directly stored in pre-registered image buffer, if not, data frame is then transmitted to upper layer driving；Before the data frame is directly stored in pre-registered image buffer, sequence detection is carried out to each data frame for reaching network interface, the cpu load of this method is lower, while effective the phenomenon that solving data frame frame losing, random frame.
Description
Technical field
The present invention relates to network transmission technology field more particularly to a kind of network interface filtration drives based on GigE Vision
Method.
Background technique
The communication mode of industrial camera mainly includes 1394 interfaces, USB interface, ameraLink interface and gigabit at present
Network interface.The limited transmission distance of 1394 interfaces, USB interface, ameraLink interface, and kilomega network interface communication, with its transmission
The features such as distance is remote, and transmission speed is higher, and networking equipment quantity is more and is not necessarily to data collecting card, is widely used.
Mainstream industry camera producer, it is external such as Germany Balser, Japan JAI, Britain E2V, Canadian Dalsa, South Korea Vieworks, state
Oneself, micro- visible image in interior such as Daheng, good perseverance, there is the industrial camera product of a plurality of gigabit Network Communications.
Industrial camera can connect in gigabit networking system, it is necessary to operational network communication protocol, association of the tradition in transport layer
View has Transmission Control Protocol and udp protocol, but cpu resource of the Transmission Control Protocol with occupancy in network transmission process is larger, transmission speed
Slowly the shortcomings that being attacked and easily, while udp protocol presence in network transmission process cannot provide reliability, flow control or difference for IP
Mistake restores the defect of function.Since GigE Vision agreement has long transmission distance, the higher feature of transmission speed, thus base
It is applied in the GigE Vision agreement of existing gigabit Ethernet communication protocol exploitation.Although GigE Vision agreement can be with
Reliability, flow control or error recovery capability are provided, but the socket communication meeting poll that Windows is carried is passed by GigE Vision
Defeated current network frame, therefore CPU usage can be significantly improved when data are transmitted and increased, so that GigE Vision is accounted for
There is the resource of CPU relatively high, and for being possible to will appear number in the case where Network status fluctuation or network congestion
According to frame loss, out-of-order situation, data frame is handled without corresponding retransmission mechanism, so that received data frame occurs
Frame losing, random frame phenomenon.
Summary of the invention
Technical problems based on background technology, the network interface filtering based on GigE Vision that the invention proposes a kind of
The cpu load of driving method, this method is lower, while effective the phenomenon that solving data frame frame losing, random frame.
A kind of network interface filtration drive method based on GigE Vision proposed by the present invention, includes the following steps:
Networks filter driver is installed, and quasi- by the filtering of networks filter driver log-on data frame in Windows kernel
Then；
Networks filter driver judges that each reaches whether the data frame of network interface meets filter criteria；
If so, data frame is directly stored in pre-registered image buffer；
If it is not, data frame is then transmitted to upper layer driving.
Further, the filter criteria includes the transmission of the source address of data frame, the destination address of data frame, data frame
The port model of type and data frame.
Further, before the data frame being directly stored in pre-registered image buffer, net is reached to each
The data frame of mouth carries out sequence detection, and sequence detection includes the following steps:
If the data frame sequentially reaches network interface, the data frame for reaching network interface is directly stored in described image buffer area；
If the data frame does not reach network interface sequentially, processing is modified to the data frame for reaching network interface.
Further, the data frame of described pair of arrival network interface is modified processing, includes the following steps:
The retransmission window length that networks filter driver is arranged is L, and all data frames are marked in the retransmission window when initial
It is denoted as dummy status；
The range that retransmission window is arranged is [A1-L, A1], and the A1 is the maximum detection threshold value of retransmission window；
Judge whether the call number X for reaching the data frame of network interface is in the range of retransmission window；
If so, the data frame is labeled as full state, and the data frame is stored in described image buffer area；
If it is not, then carrying out correcting process again to data frame.
Further, described that correcting process again is carried out to data frame, include the following steps:
If the call number X of the data frame for reaching network interface is less than A1-L, the data frame is abandoned；
If the call number X of the data frame for reaching network interface is greater than A1, the range of retransmission window is updated, and by the data
Frame flag is full state；
Detect updated retransmission window whether frame losing, correcting process again is carried out to data frame to realize.
Further, the updated retransmission window of the detection whether frame losing, include the following steps:
The range for updating retransmission window is [B1-L, B1], and the B1 is the maximum detection threshold of retransmission window after updating
Value；
The detection range that frame losing is arranged is [A1-L, B1-L]；
With the presence or absence of the data frame labeled as dummy status in [A1-L, B1-L] described in detection；
If so, then data frame frame losing, carries out retransmission process to the data frame；
If nothing, the non-frame losing of data frame, and the data frame is stored in described image buffer area.
Further, when the described pair of data frame carries out retransmission process, include the following steps:
Re-transmission timing by the timer setting data frame being arranged in networks filter driver；
Judge retransmitting in timing, whether the data frame of re-transmission reaches network interface；
If so, judging whether data frame meets filter criteria；
If it is not, then retransmission process is carried out to the data frame again, until the data frame of re-transmission reaches network interface.
Further, when the described pair of data frame carries out retransmission process, addition pakcet_resend_max_count ginseng
The data frame of number, re-transmission is not more than pakcet_resend_max_count parameter.
A kind of the advantages of network interface filtration drive method based on GigE Vision provided by the invention, is: knot of the present invention
A kind of network interface filtration drive method based on GigE Vision provided in structure, this method can for the network data frame of loss
Quickly to initiate retransmission request, responsiveness is fast, and retransmitting data frame and request data frame time interval are shorter.Simultaneously in network filtering
Timer and addition pakcet_resend_max_count parameter are set in driving, so that the operational efficiency of networks filter driver
Height, even if still be able to guarantee that the re-transmission number packet of data frame is reached in the case where network pay load is close to 90% on time；By
In under the Socket interface case carried using Windows, there are cpu loads can be significant with data transmission bauds increase
The defect of promotion, therefore filtration drive calls the filtering registered in call back function quasi- in Windows kernel registered callbacks function
Then, processing is filtered for each network data frame of arrival, the data of network data frame is driven without upper layer,
Whole process is participated in without CPU, is reduced the utilization rate of CPU, is improved network transfer speeds；By to not reaching network interface sequentially
Data frame be modified processing, efficiently solve due to the problems such as interchanger bring data frame is out-of-order, frame losing, improve number
According to the acquisition quality of frame.
Detailed description of the invention
Fig. 1 is a kind of step flow diagram of the network interface filtration drive method based on GigE Vision of the present invention；
Fig. 2 is the detailed step flow diagram of step S32 in the present invention；
Fig. 3 is the detailed step flow diagram of step S328 in the present invention.
Specific embodiment
In the following, technical solution of the present invention is described in detail by specific embodiment.
Referring to Fig.1, a kind of network interface filtration drive method based on GigE Vision proposed by the present invention, including walk as follows
Rapid S1 to S4:
S1: installation networks filter driver, and pass through the filtering of networks filter driver log-on data frame in Windows kernel
Criterion, the filter criteria include the source address of data frame, the destination address of data frame, data frame transport-type and data frame
Port model；
The end PC install networks filter driver, after install successfully, all-network interface (including cable network with wirelessly
Network) it can all register corresponding filtration drive entity.It is realized by the filtration drive entity of registration and network interface is reached to each
Data frame carries out corresponding filtration treatment.The registered callbacks function on Windows kernel passes through what is registered in calling call back function
Filter criteria can filter each and reach the data frame of network interface, and the data frame for meeting filter criteria is sequentially put into image
In buffer area.
By the filter criteria of registration, processing targetedly is filtered to data frame, is realized to data frame difference information
The operation such as filtering, acquisition, processing.
Described image buffer area is for storing effective network data frame.
S2: networks filter driver judges that each reaches whether the data frame of network interface meets filter criteria；
If so, into S3；
If it is not, then entering S4；
S3: data frame is directly stored in pre-registered image buffer；
S4: data frame is transmitted to upper layer driving.
By S1 to S4, the purpose being filtered to the data frame for reaching network interface is realized, while will not meet filter criteria
Data frame be directly forwarded to upper layer driving, avoid because the data frame for not meeting filter criteria is in the accumulation of network interface filtration drive,
Caused network congestion phenomenon, to improve the efficiency of transmission and quality of network.
When data frame being directly stored in pre-registered image buffer in the step S3, networks filter driver stops will
It is driven to upper layer and forwards the data frame.
Further, data frame is directly stored in front of pre-registered image buffer in the step S3, to each
The data frame for reaching network interface carries out sequence detection, and sequence detection includes the following steps: S31 to S32.
S31: if the data frame sequentially reaches network interface, the data frame for reaching network interface is directly stored in described image buffering
Area；
S32: if the data frame does not reach network interface sequentially, processing is modified to the data frame for reaching network interface.
All data frames for reaching network interfaces are sequentially to reach in logic, but because of situations such as network fluctuation and network congestion
May existing frame losing phenomenon so that there is the phenomenon that out-of-order, frame losing in the data frame for reaching network interface, it is therefore desirable to reaching net
The data frame of mouth carries out sequence detection, so that deposit described image buffer area is sequentially stored.
As shown in Fig. 2, further, step S32: if the data frame does not reach network interface sequentially, to arrival network interface
Data frame is modified processing, includes the following steps S321 to S328:
S321: the retransmission window length that networks filter driver is arranged is L, all data frames in retransmission window when initial
Label is i.e. Packeti=empty (i=[1 ... L])；
S322: the range that retransmission window is arranged is [A1-L, A1], and the AI indicates the maximum detection threshold value of retransmission window,
When more than the threshold value, then the call number X for reaching the data frame of network interface is not in the range [A1-L, A1]；
Since the maintenance length of networks filter driver is L, i.e., the range of retransmission window is [A1-L, A1],.
S323: judge whether the call number X of the data frame for reaching network interface is in the range of retransmission window；
If so, into S324；
If it is not, then entering S325；
S324: the data frame is then labeled as full state, and the data frame is stored in described image buffer area；
S325: judge whether the call number X for reaching the data frame of network interface is less than A1-L.
If so, into S326；
If it is not, then entering S327；
S326: the data frame is abandoned；
When the call number X for the data frame for reaching network interface is less than A1-L (retransmission window minimum value), expression retransmission window is caught
The data frame obtained is collected data frame, therefore the data frame for being less than retransmission window minimum value is abandoned, to avoid
Obtain duplicate data packet.
S327: the range of retransmission window is updated, and the data frame is labeled as full state；
For step S327, since the call number X of the data frame had both been not at [A1-L, A1] range, and meanwhile it is not small
In A1-L, then the call number X for obtaining the data frame that can be beyond all doubt is greater than A1, i.e. the call number X of the data frame is greater than weight
Pass the maximum value of window.
Therefore when call number X is greater than retransmission window maximum value, the range of retransmission window is updated, and by the data frame flag
For full state.
S328: detect updated retransmission window whether frame losing, with realize reach network interface data frame correcting process.
By step S321 to S328, the data frame for not reaching network interface sequentially is modified, so that into image buffers
Data frame in area is sequentially stored, and data frame obtains wrong caused by avoiding because of random ordering.
As shown in figure 3, further, the step S328: detect updated retransmission window whether frame losing, including it is as follows
Step S3281 to S3285:
S3281: the range for updating retransmission window is [B1-L, B1], and the B1 is the maximum of retransmission window after updating
Detection threshold value；
In order to clearer retransmission detection window whether frame losing, at this time B1 be reach network interface data frame call number X, more
New retransmission window can largely detect whether frame losing phenomenon based on call number X.
Since the maintenance length of networks filter driver is L, that is, the range of retransmission window is [B1-L, B1] after updating.
S3282: the detection range that frame losing is arranged is [A1-L, B1-L]；
Since the range of updated retransmission window is [B1-L, B1], and the range of former retransmission window is [A1-L, A1],
That is the retransmission window distance that moves B1-A1, it is therefore desirable to range is formed by the distance and carry out data frame detection, the i.e. number
It is [A1-L, B1-L] according to frame detection range.
With the presence or absence of the data frame labeled as dummy status in S3283: [A1-L, B1-L] described in detection；
If so, then entering S3284；
If nothing, enter S3285；
S3284: retransmission process is carried out to the data frame；
S3285: and the data frame is stored in described image buffer area.
By step S3281 to S3285 it is found that due to update retransmission window range when, by the data frame labeled as full
State, when detect in [A1-L, B1-L] range there are data frame be labeled as dummy status data frame, then it represents that there are data frames
The phenomenon that loss, needs to the network interface industrial camera request retransmission data packet.Exist when being not detected in [A1-L, B1-L] range
Data frame is labeled as the data frame of dummy status, then it represents that the phenomenon that admission control is not present does not need to network interface industrial camera
This data frame is stored in described image buffer area by the request retransmission data packet.
It is further preferred that the step S3284: retransmission process is carried out to the data frame, includes the following steps E1 to E4:
E1: by the re-transmission timing for the timer setting data frame being arranged in networks filter driver；
E2: judge retransmitting in timing, whether the data frame of re-transmission reaches network interface；
If so, entering step E3；
If it is not, then entering step E4；
E3: S2 is entered step；
E4: carrying out retransmission process to the data frame again, until the data frame of re-transmission reaches network interface.
By step E1 to E4, for the re-transmission data packet of each data frame, networks filter driver safeguards that one is determined for it
When device, and be that reasonable timing is arranged in retransmitting data frame by timer, should in the timing that timer is set
When retransmitting data frame does not reach yet, then retransmitting data frame is sent again and instructs and start timer, until retransmitting data frame reaches
Network interface.In the timing that timer is set, which reaches network interface, then enters step S2: network filtering drives
It is dynamic to judge that each reaches whether the data frame of network interface meets filter criteria, by retransmitting data frame together with normal data frames, lead to
It crosses above method and carries out corresponding filtration treatment, realize the acquisition to retransmitting data frame and be sequentially stored in image buffer.
Further, when the described pair of data frame carries out retransmission process, addition pakcet_resend_max_count ginseng
The data frame sum of number, re-transmission is not more than pakcet_resend_max_count parameter.pakcet_resend_max_count
Parameter indicates the quantity of the most retransmission frames of every frame data, it is assumed that a frame data need to transmit 10000 data frames, then are arranged
Packet_resend_max_count=2000 expression can at most retransmit 2000 data frames.
For above-mentioned repeating method, it is possible to a large amount of data frame can be requested to retransmit data in the case where network congestion
Packet may result in the phenomenon that network environment deteriorates, in order to avoid this phenomenon, pakcet_ added in networks filter driver
Resend_max_count parameter, by the way that the parameter is arranged, it is ensured that the re-transmission data packet sum of the data frame of re-transmission is not more than should
Parameter, while re-transmission the sum of data packet transmission speed and normal data frames transmission speed being made to be less than network transmission maximum speed,
The possibility occurred so as to avoid network congestion.
Illustrate: two programs on network realize the exchange of data by a two-way communication connection, this connection
One end is known as a socket.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of network interface filtration drive method based on GigE Vision, which comprises the steps of:
Networks filter driver is installed, and passes through the filter criteria of networks filter driver log-on data frame in Windows kernel；
Networks filter driver judges that each reaches whether the data frame of network interface meets filter criteria；
If so, data frame is directly stored in pre-registered image buffer；
If it is not, data frame is then transmitted to upper layer driving.
2. the network interface filtration drive method according to claim 1 based on GigE Vision, which is characterized in that the mistake
Filter criterion includes the port model of the source address of data frame, the destination address of data frame, the transport-type of data frame and data frame.
3. the network interface filtration drive method according to claim 1 based on GigE Vision, which is characterized in that will be described
Data frame is directly stored in front of pre-registered image buffer, carries out sequence detection to each data frame for reaching network interface,
Its sequence detection includes the following steps:
If the data frame sequentially reaches network interface, the data frame for reaching network interface is directly stored in described image buffer area；
If the data frame does not reach network interface sequentially, processing is modified to the data frame for reaching network interface.
4. the network interface filtration drive method according to claim 3 based on GigE Vision, which is characterized in that described right
The data frame for reaching network interface is modified processing, includes the following steps:
Be arranged networks filter driver retransmission window length be L, when initial in the retransmission window all data frames mark be
Dummy status；
The range that retransmission window is arranged is [A1-L, A1], and the A1 is the maximum detection threshold value of retransmission window；
Judge whether the call number X for reaching the data frame of network interface is in the range of retransmission window；
If so, the data frame is labeled as full state, and the data frame is stored in described image buffer area；
If it is not, then carrying out correcting process again to data frame.
5. the network interface filtration drive method according to claim 4 based on GigE Vision, which is characterized in that described right
Data frame carries out correcting process again, includes the following steps:
If the call number X of the data frame for reaching network interface is less than A1-L, the data frame is abandoned；
If the call number X of the data frame for reaching network interface is greater than A1, the range of retransmission window is updated, and by the data frame mark
It is denoted as full state；
Detect updated retransmission window whether frame losing, correcting process again is carried out to data frame to realize.
6. the network interface filtration drive method according to claim 5 based on GigE Vision, which is characterized in that the inspection
Survey updated retransmission window whether frame losing, include the following steps:
The range for updating retransmission window is [B1-L, B1], and the B1 is the maximum detection threshold value of retransmission window after updating；
The detection range that frame losing is arranged is [A1-L, B1-L]；
With the presence or absence of the data frame labeled as dummy status in [A1-L, B1-L] described in detection；
If so, then data frame frame losing, carries out retransmission process to the data frame；
If nothing, the non-frame losing of data frame, and the data frame is stored in described image buffer area.
7. the network interface filtration drive method according to claim 6 based on GigE Vision, which is characterized in that described right
When the data frame carries out retransmission process, include the following steps:
By the timer being arranged in networks filter driver, the re-transmission timing of data frame is set；
Judge retransmitting in timing, whether the data frame of re-transmission reaches network interface；
If so, judging whether data frame meets filter criteria；
If it is not, then retransmission process is carried out to the data frame again, until the data frame of re-transmission reaches network interface.
8. the network interface filtration drive method according to claim 6 based on GigE Vision, which is characterized in that described right
When the data frame carries out retransmission process, pakcet_resend_max_count parameter is added, the data frame of re-transmission is not more than
Pakcet_resend_max_count parameter.
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