JPH021664A - Network system - Google Patents

Abstract

PURPOSE:To make a buffer in the interface of a node on a reception side into a small scale by providing a means generating a packet by means of adding identification information of miscellaneous information and picture element data, and a means distributing miscellaneous information and a picture element data. CONSTITUTION:The packet P1 is generated in a packet generation means 5 based on control data D1, miscellaneous information D2 and picture element data D3. Here, identification information of miscellaneous information D2 and picture element data D3 is added to control data D1 or miscellaneous information D2. The generated packet P1 is transmitted to a network 3 through an I/F(interface) 71. On the other hand, a data discrimination means 61 first receives control data D1 from I/F 71, receives miscellaneous information D2 next, and distributes miscellaneous information D2 and picture element data D3 which is successively fetched from identification information included in control data D1 or miscellaneous information D2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a network system that includes a plurality of nodes and enables data communication between each node.

(Prior Art) Image communication in a network system involves the transfer of pixel data and associated image information (ID number 9).
Image generation date, etc.) are transferred. Conventionally, pixel data and image supplementary information (hereinafter referred to as "supplementary information") have been transferred separately rather than as one message. That is, the transmitting side node and the receiving side node first make arrangements for image supplementary information, then pixel data, and so on, and then transfer the data after making arrangements each time.

Furthermore, apart from the above-mentioned method, there is a method in which supplementary information and pixel data are transferred as one message. The ACR-NEMA standard for medical image communication uses the latter method. According to this method, all transferred messages are captured in a buffer within the receiving node's interface,
Then, by analyzing the contents of the message, it is conceivable to sort the incidental information and pixel data.

(Problem to be Solved by the Invention) However, in this case, since the amount of information in the pixel data is enormous, a large-scale buffer must be provided in the interface, and the overhead associated with message analysis ( The disadvantage is that there is a large amount of dead time.

Therefore, the present invention aims to eliminate the above-mentioned drawbacks, and its purpose is to reduce the size of the buffer in the interface of the receiving node in a network system that transfers incidental information and pixel data as one message, and to reduce the size of the message. The aim is to reduce overhead associated with analysis.

[Structure of the Invention] (Means for Solving the Problems) The first invention includes a plurality of nodes, and forms packets based on control data, supplementary information, and pixel data related to image transfer, and transmits the packets to each node. In a network system that enables data communication between pixel data, a transmitting node is provided with a packet forming means for forming a packet by adding identifying information between incidental information and pixel data, and The receiving node is equipped with data discriminating means for distributing information and pixel data.

Further, the second invention includes a plurality of nodes, and forms a command packet based on control data regarding image transfer, forms a data packet based on incidental information and pixel data, and transfers data between each node. In a network system that enables communication, a transmitting node is provided with a packet forming means for forming a command packet by adding identification information between incidental information and pixel data to the control data, and
The receiving node is provided with a packet discriminating means for distributing supplementary information and pixel data at the packet level based on the identification information.

Furthermore, a third invention is a network system that includes a plurality of nodes and enables data communication between each node, in which a command packet is formed based on control data related to image transfer, and a command packet is formed based on accompanying information. The transmitting side node is equipped with a packet forming means for forming an incidental information packet and a pixel data packet based on pixel data, and the receiving side node is equipped with a packet determining means for sorting each of the packets by determining the type of the received packet. It is prepared for.

(for production) The first invention operates as follows.

At the transmitting side node, a packet is formed by adding additional information and identification information of pixel data.

At the receiving side node, the incidental information and the pixel data are sorted based on the identification information. In other words, after a packet arrives at the receiving node, it is quickly determined whether the data is supplementary information or pixel data, and the data is distributed. According to this, it is not necessary to capture all of the message (incidental information 9-pixel data) transferred from the sending node into the interface buffer, so it is possible to reduce the size of the interface buffer, and it is possible to reduce the size of the interface buffer. Overhead can be reduced.

The second invention operates as follows.

At the transmitting side node, identification information between the supplementary information and the pixel data is added to the control data, and a command packet is formed based on this. At the receiving side node, the command packet is first received, and then the data packet is received. At this time, the distribution between the additional information and the pixel data is performed at the packet level based on the identification information. .

That is, after the data packet arrives at the receiving node,
It is quickly determined whether the packet is supplementary information or pixel data, and the packets are sorted. According to this, the message (additional information) transferred from the sending node.

Since it is not necessary to import all of the pixel data (pixel data) into the in-interface buffer, the in-interface buffer can be made smaller and the overhead associated with message analysis can be reduced.

The third invention operates as follows.

In the third invention, packets are formed and transmitted for each two-pixel data of control data and supplementary information, and the receiving side performs packet distribution by determining the type of each packet. Therefore, in this case as well, as in the case of the first invention, there is no need to capture all messages transferred from the sending node into the interface buffer, so the size of the interface buffer can be reduced.
Additionally, overhead associated with message analysis can be reduced.

(Example) Hereinafter, the present invention will be specifically explained with reference to Examples.

FIG. 1 shows a network system showing a first embodiment (first embodiment) of the present invention.

This network system consists of a first node 1 and a second node 2 connected to a network 3. The first node 1 is an IE (medical equipment) 4□.

It has a CPU (central processing unit) 8□ and an I/F (interface) 71. As the IE 41, a medical image diagnostic device such as an X-ray CT system or an MRI system, a medical image storage device, a medical image display device, or the like is applied. The main control in data communication is carried out by the CPU8. The packet forming means 51 and the data discriminating means 6□ in the present invention are functionally realized by this CPU 8□.

One message contains control data D1 as shown in FIG.
．． Assuming that the supplementary information D2 and the pixel data D3 are composed of the control data D3, the packet forming means 51
1. Packet P1 is formed based on supplementary information D2 and pixel data D3.

Here, identification information of the supplementary information D2 and the pixel data D3 is added to the control data D1 or the supplementary information D2. That is, by looking at the control data D1 or the supplementary information D2, it becomes possible to distinguish between the supplementary information D2 and the pixel data D3. However, the packet P1 formed by the packet forming means 5 is transmitted to the I/F 7. It is configured to be sent to network 3 via .

The data discrimination means 6 also has an I/F 7. This is to determine the data taken in from the network 3 via the network 3. Data communication via network 3 includes control data D
1. Additional information D2. The processing is performed in the order of pixel data D3. Therefore, the data discriminating means 6□ first
F7. receives control data D1, and then receives additional information D2.
is received, and based on the identification information included in the control data D1 or the incidental information D2, the incidental information D2 and the subsequently captured image data D3 are sorted.

In this way, the additional information D2 and the pixel data D3 are distributed. As a result, in the system of this embodiment, there is no need to import all the messages transferred from the first node 1 into the buffer of I/F7□ and analyze the messages. The system can be made smaller in size, and the overhead associated with message analysis can be reduced.

The above is the configuration of the first node 1, but the second node 2
is also structured in the same way. In Figure 1, 1. Second
The same constituent blocks in nodes 1 and 2 are denoted by subscripts (1,
2).

Note that the first invention is not limited to the above embodiment.

In the above embodiment, the first node 1 is the sending side and the second node 2 is the receiving side, but it is also possible to transfer the image from the second node 2 to the first node 1 in the opposite way. can. In the above embodiment, both the first and second nodes 1 and 2 have data discrimination means (6, 2).

6°) and packet forming means (51, 5□), it is only necessary to provide at least the packet forming means in the transmitting node and the data discriminating means in the receiving node.

Further, in the above embodiment, the packet forming means and the data discriminating means were implemented as software by the CPU, but for example, the I-
They can also be implemented in hardware within /F (interface).

FIG. 3 shows a network system showing a second embodiment (second embodiment) of the present invention.

This network system includes a first node 21 and a second node 21.
The node 22 is connected to the network 23. 1st
The node 21 of rE (medical equipment) 24. , CPU (
central processing unit) 28+.

It has an I/F (interface) 271.

The main control in data communication is performed by the CPU 28°, and the packet forming means 25□ and the packet discriminating means 26□ in the present invention are functionally realized by this CPU 28L.

One message is the control data D2 as shown in FIG.
1. Assuming that the supplementary information D22 and the pixel data D23 consist of the control data D23, the packet forming means 251 generates the control data D23.
A command packet P2] is formed based on the data 21, and a data packet P22 is formed based on the supplementary information D22 and the pixel data D'23. Here, the control data D
21 is appended with information indicating the length of the supplementary information D22, for example, the byte length. That is, if you look at the control data D21, the control data D21. The byte length (length of information) of the additional information D22 that is subsequently taken in can be known, thereby making it possible to distinguish between the additional information D22 and the pixel data D23.

Information indicating the byte length of this additional information D22 is an example of identification information in the present invention. However, the packet P21. which is formed by the packet forming means 25. P
22 is sent to the network 23 via r/F27□.

Further, the packet discrimination means 261 detects the packet P21. P2
This is to make the second determination. Data communication via the network 23 includes control data D21. The supplementary information D222 and the pixel data D23 are processed in the order of packet format. Therefore, the packet discriminating means 261 first
Receives the packet P21 of the control data D21 from the F 271, learns the length of the additional information D22 from the identification information (byte length) included in this control data D21, and uses this as a reference to distribute the subsequently captured data packets P22. I do. Here, the distribution of the data packet P22 means the distribution of the supplementary information D22 and the pixel data D23 at the packet level.

The above is the configuration of the first node 21, and the second node 22 is also configured in the same manner. In Figure 3, 1.
Identical constituent blocks in the second nodes 21 and 22 are distinguished by subscripts (1, 2).

Next, the operation of the embodiment system configured as described above will be explained with reference to the flowchart shown in FIG.

In the system of this embodiment, the first. second node 21.22
Although both have the same configuration and have a data transmission/reception function, in the following operation description, a case will be described in which image information is transferred from the first node 21 to the second node 22.

In the first node 21, the packet forming means 25□ converts the control data D into information indicating the byte length of the additional information for transfer.
21, and a command packet P21 is formed based on this data D21. Furthermore, this packet forming means 25. Incidental information D221 pixel data D23
Data packet P22 is formed based on.

The formed packets P22 are sequentially sent out to the network 23 via the I/F 27+, and are taken into the second node 22 via the I/F 27□.

The second node 22 is in a reception waiting state (S21) until there is an interrupt to the I/F27□.
Packet reception is started by an interrupt to F27□. (S22).

Packet P21. When P22 is received, the CPU 28□
The packet discriminating means 26□ identifies the packet P21. P2
2 type determination is performed (S23). The type determination here is based on the packet P21. It is determined whether P22 is a command packet P21 or a data packet P22.

The packet sent from the first node 21 is the command packet P21. Since it is performed in the order of data packet P22,
Packet P21 first captured into second node 22
．． P22 is always command packet 1. In the packet discrimination means 26□, the last command packet P21
A determination is made as to whether or not the data has been imported (is this all?) (S24). This determination is made based on the flag attached to the last command packet P21 among the plurality of command packets P21. Command packet P21 is I
/F27□ is stored in the buffer (S25). After all the command packets P21 have been taken in (after the determination in step 824 is YES), the CPU 2
8□ learns the byte length of the additional information D22 (this is referred to as rlength!hJ) from the control data D21 (S26)
. Then, the variable N is set to 0 (S27).

Next, in the determination at step 823, the captured packet P21. When it is determined that P22 is a data packet P22, the packet discrimination means 26□ of the CPU 28°
Determine whether N≧length holds true (S
28). N is a variable, and in this flow, it remains set to 0 in step S27. This step 82
8, if N≧length holds true, it means that the data D22 transferred from the first node 21
゜This means that there is no additional information D22 in D23, and the data packet P22 and the following data packet P22 are all pixel data D23, so they will be transferred to the image memory in IE24□. (S34). Further, in the determination in step S28, if it is determined that N≧length does not hold, this means that the data packet P22 includes the supplementary information D22, so the packet determining means 26 of the CPU 282 □ checks the data length (this is set as n) excluding the header of data packet P22 (S29)
, this is added to N and N is updated (830). and,
It is determined whether N≧length holds true (83
1). In this determination, if it is determined that N≧length does not hold, the data packet P22 is all supplementary information D22 and does not contain pixel data D23, so it is transferred to the supplementary information memory in IE24□. be done. Each time the data packet P22 is captured, N is updated in step 830, and if it is determined in step 831 that N≧length holds true, then N - (length+n
) + data after the first (all pixel data) I
E, transfer to image memory in 24□ (S32)
. From then on, all data packets P22 (until the one with the final flag arrives) are transferred to the image memory.

In this way, the auxiliary information D22 and the pixel data D23 are distributed at the packet level.

As a result, in the system of this embodiment, there is no need to import all the messages transferred from the first node 21 into the buffer of I/F 27□ and analyze the messages. The system can be made smaller in size, and the overhead associated with message analysis can be reduced.

Note that the second invention is not limited to the above embodiment.

In the above embodiment, the first node 21 is the sending side and the second node 22 is the receiving side, but it is also possible to transfer the image from the second node 22 to the first node 21 in the opposite way. can. In the above embodiment, the first. second node 21
, 22 have been described as having packet discriminating means (26, 26□) and packet forming means (25, 25□), but the transmitting side node has a packet forming means, and the receiving side node has a packet discriminating means. It suffices if at least each means is provided. Further, in the above embodiment, the packet forming means and the packet discriminating means are implemented in software by the CPU, but it is also possible to provide a circuit for implementing them in hardware, for example, within an I/F (interface).

FIG. 6 is a network system showing a third embodiment (third embodiment) of the present invention.

31 is a first node, 32 is a second node, and 33 is a network. The first node 31 is an IE
34. , CPU38. , I/F 371. The main control in data communication is performed by the CPU 38, and the packet forming means 35 and the packet determining means 36□ in the present invention are functionally realized by this CPU 38□.

One message contains control data D as shown in FIG.
31. Assuming that it consists of the supplementary information D32 and the pixel data D33, the packet forming means 35□ forms a command packet P31 based on the control data D31,
A supplementary information bucket P32 is formed based on the supplementary information D32, and a pixel data packet P33 is formed based on the pixel data D33. In other words, the packets P31. P32°P33 are formed. Thus, the packet P31. which is formed by this packet forming means 35. P32. P33 is r
/F37□ to be sent to the network 33.

Furthermore, the packet determining means 361 determines whether a packet) P31. P3
2. Based on the type determination of P33, each of the packets P31. P
32. This is to allocate P33. Each of the above packets P31. Since the types of P32 and P33 are different, the packet P31. P32.
Allocating P33 is easy.

The above is the configuration of the first node 31°, and the second node 32 is also configured in the same manner.

In FIG. 6, 1. Identical constituent blocks in the second nodes 31 and 32 are distinguished by subscripts (1, 2).

Next, an embodiment system configured as described above will be explained with reference to the flowchart of FIG. 8.

In the system of this embodiment, the first. second node 31.32
Although both have the same configuration and have a data transmission/reception function, in the following operation description, a case will be described in which an image is transferred from the first node 31 to the second node 32.

In the first node 31, the packet forming means 35 generates the control data D31. Additional information D32 and pixel data D
Each packet P31.33 has a different type. P3
2. P33 is formed. In this packet formation,
control data packet) P31. Final packet P of each of the supplementary information packet hP32 and the pixel data packet P33
31. P32. In P33, it is the final packet) P31
．． P32. A flag indicating that it is P33 is added. Thus, the packets P31, P32 . P33 is I/F371
are sequentially sent to the network 33 via t/F37
It will be taken into the second node 32 via □.

The second node 32 is in a reception waiting state (S40) until there is an interrupt to the I/F 37□.
Packet reception is started by an interrupt to F37□ (S41).

Packet P31. P32. When P33 is received, CP
The packet determination means 36° of U38□ determines whether the packet P
31. P32. P33 type determination is performed (S42
). In this packet type determination, the packet P3
1. P32. If it is determined that P33 is the command packet P31, it is determined whether or not there is a final flag (S43). The command packet P31 is stored in a buffer (S44), and command processing is performed after the packet to which the final flag has been added (ie, the final command packet P31) is fetched (S45).

Furthermore, in the packet type determination at step 842, the packet P31. P32. If it is determined that P33 is the supplementary information packet P32, it is determined whether or not there is a final flag (846). The supplementary information packet P32 is stored in the supplementary information memory (S47), and after the supplementary information packet P32 to which the final flag has been added is fetched, supplementary information processing is performed (348).

Furthermore, in the packet type determination at step 342, the packet P31. P32. If it is determined that P33 is the pixel data packet P33, it is determined whether or not there is a final flag (S49). The pixel data D33 is stored in the image memory (S50), and after the pixel data packet P33 to which the final flag has been added is captured, pixel data processing is performed (S51).

In this way, in the system of this embodiment, the packet control means 35 controls the control data D31 and the additional information D32.
and packet P31. for each pixel data D33. P
3.2. P33 and this packet P31. P32
．． Packet sorting based on the type determination of P33 is performed by the packet determining means 36□, and message analysis is not performed after all messages are taken into the buffer within I/F 37□. The size of the internal buffer can be reduced, and the overhead associated with message analysis can be reduced.

Note that the third invention is not limited to the above embodiment.

In the above embodiment, the first node 31 is the sending side and the second node 32 is the receiving side, but it is also possible to transfer the image from the second node 32 to the first node 31 in the opposite way. can. In the above embodiment, the first. second node 31
, 32 have been described as having packet determining means (36, 36□) and packet forming means (35□, 35□), but the sending node has a packet forming means, and the receiving node has a packet forming means. It is sufficient that each of them is provided with at least a determining means. Further, in the above embodiment, the packet forming means and the packet determining means are realized in software by the CPU, but they can also be realized in hardware, for example, within an I/F (interface).

FIG. 9 is a block diagram showing a main part configuration of a node of a network system showing a first modification of the second embodiment.

The node is an image memory 41 of an IE (medical equipment), C
PU42. It has a memory 43 for the CPU 42 and a transceiver 44 including a function as an I/F. Transceiver 4
4 includes a buffer 45. image memory 41
．． CPU42. Memory 43 and transceiver 44 are connected via bus 1, and image memory 41 and transceiver 44 are connected via bus 2.

Transceiver 44 includes a buffer 45 . Data communication in this node is mainly controlled by the CPU 42.

One message consists of control data D as shown in FIG.
21. It is composed of supplementary information D22 and pixel data D23. In the sending node, similarly to the system shown in FIG. 3, the CPU 42 forms a command packet P21 based on the control data D21, and the accompanying information D2
data packet P2 based on pixel data D23 and pixel data D23.
2 is formed. Here, the command packet P21 of the control data D21 includes information indicating the length of the supplementary information D22, for example, the byte length. This additional information D22
The information indicating the byte length of can be used as identification information for identifying the additional information D22 and the pixel data D23.

Packet P21. formed in this way. P22 is sent to the network via the transceiver 44 on the transmitting side.

Data communication via the network includes control data D21.
The supplementary information D22 and the pixel data D23 are processed in the order of packet format. Therefore, the command packet P21 containing the control data D21 first arrives at the transceiver 44 of the receiving node.

Transceiver 44 interrupts CPU 42 upon receiving command packet P21.

(Step 360) The CPU 42 analyzes the control data D21 taken into the buffer 45 of the transceiver 44, and uses the byte length information, which is the identification information, as the additional information D2.
2 is obtained and stored in a register within the CPU 42.

(Step 561) If the first received packet P21. If P22 does not include the identification information,
Similarly, step 3 is executed for the next command packet P21.
Repeat step 60.

(Step 562) When the data packet P22 is received following the command packet P21, the CPU 42 (
M is the number of bytes of the packet - the number of bytes of the header part)
is compared with the value M' stored in the register.

(Step 563) If M<M' in step 362,
DMA packet P22 to memory 43 via bus 1
(direct memory access) and assign (M-M') to the register. and,
Continuing to receive data packet P22, step S6
Repeat step 2.

(Step 564) If M≧M′ in step S62,
DMA transfers M' bytes of data from the beginning of packet P22 (excluding the header) to memory 43 via bus 1;
The remaining MM' bytes of data are then DMA-transferred to the image memory 41 via the bus 2.

(Step 565) The data packet P22 received after step 864 is transferred to the image memory 4 via the bus 2.
DMA transfer to 1.

Note that in the above system, in step S60, the contents of the buffer 45 of the transceiver 44 are transferred to the memory 43 by DMA transfer.
The control data in the memory 43 may be analyzed after being transferred.

FIG. 10 is a block diagram showing a main part configuration of a node of a network system showing a first modification of the third embodiment.

The nodes include image memory 51 and C of IE (medical equipment).
PU52. It has a memory 53 for a CPU 52 and a transceiver 54 including a function as a T/F. Transceiver 5
4 is equipped with a buffer 55. image memory 51
．． CPU52. Memory 53 and transceiver 54 are connected via bus 1, and image memory 51 and transceiver 54 are connected via bus 2.

Data communication in this node is mainly performed by the CPU 52.
controlled by

One message includes control data D as shown in FIG.
31. It is composed of supplementary information D32 and pixel data D33. At the transmitting side node, as in the system shown in FIG. 6, for example, the CPU 52 forms a command packet P31 based on the control data D31, and the accompanying information D32 is generated.
An additional information packet P32 is formed based on the pixel data D33, and a pixel data packet P33 is formed based on the pixel data D33. In other words, the control data D31. Additional information D32
and packets P31., each having a different type for each pixel data D33. P32. P33 is formed, and information on these packet types is included in packets P31. P32. Included in the P33 header.

Packet P31. formed in this way. P32゜P33
is transmitted to the network via the transceiver 54 on the transmitting side.

Data communication via the network includes command packets P31. of control data D31. The supplementary information packet P32 and the pixel data packet P33 are performed in packet format in this order. Therefore, the command packet P31 first reaches the transceiver 54 of the receiving node.

Transceiver 54 interrupts CPU 52 upon receiving command packet P31.

(Step 870) The CPU 52 stores the data D31. D32.
Analyze D33 and determine the packet type.

(Step 571) If the packet type is command packet P31 or supplementary information packet P32, packet P31. DM P32 to memory 53 via bus 1
A Transfer.

(Step 572) If the packet type is pixel data packet P33, packet P33 is DMA-transferred to image memory 51 via bus 2.

FIG. 11 is a block diagram showing a main part configuration of a node of a network system showing a second modification of the third embodiment.

The nodes are rE (medical equipment) image memory 61, C
PU62. It has a memory 63 for the CPU 62 and a transceiver 64 that functions as an I/F. Transceiver 64 includes a packet type identification circuit 65 . Image memory 61°CPU62. Memory 63 and transceiver 64 are connected via bus 1, and image memory 61 and transceiver 64 are connected via bus 2.

The packet type identification circuit 65 performs packet type identification by hardware processing, which corresponds to the processing in step 870 in the system of FIG. Transceiver 64
A buffer is provided as necessary. CPU62
According to the identification result of the packet type identification circuit 65,
Steps S71 and 872 in the system of FIG.
All you have to do is perform the process equivalent to .

In such a system, compared to the system shown in Figure 10,
The load on the CPU is reduced and the processing speed is further increased.

FIG. 12 is a block diagram showing a main part configuration of a node of a network system showing a second modification of the second embodiment.

The node is an image memory 71 of an IE (medical equipment), C
PU72. It has a memory 73 of a CPU 72 and a transceiver 74 including a function as an r/F. Transceiver 74 includes a data identification circuit 75. Image memory 71. The CPU 72, memory 73, and transceiver 74 are connected via bus 1, and the image memory 71 and transceiver 74 are connected via bus 2.

The data identification circuit 75 performs hardware processing to identify data included in the processing corresponding to steps 360 to 864 in the system of FIG. Transceiver 74
A buffer is provided as necessary. CPU72
According to the identification result of the data identification circuit 75, data transfer processing included in the processing corresponding to steps 363 to 865 in the system of FIG. 9 may be performed.

In such a system, C
The load on the PU is reduced and the processing speed is further increased.

[Effects of the Invention] As detailed above, the first effect. According to the second and third inventions, in a network system that transfers incidental information and pixel data as one message, it is possible to reduce the size of the buffer in the interface of the receiving node and reduce the overhead associated with message analysis. It has the excellent effect of being able to

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the configuration of a network system according to the first embodiment of the present invention, FIG. 2 is an explanatory diagram of the message configuration, and FIG.
The figure is a configuration block diagram of a network system according to a second embodiment of the present invention, FIG. 4 is an explanatory diagram of a message configuration, FIG. 5 is a flowchart for explaining the operation of the embodiment system of FIG. 3, and FIG. A configuration block diagram of a network system according to a third embodiment of the present invention, FIG. 7 is an explanatory diagram of a message configuration, FIG. 8 is a flowchart for explaining the operation of the embodiment system of FIG. FIG. 10 is a block diagram showing a main part configuration of a node in a network system showing a first modification example of the third embodiment; FIG.
FIG. 1 is a block diagram showing the main part of a node in a network system showing a second modification of the third embodiment, and FIG.
FIG. 3 is a block diagram illustrating a main part configuration of a node of a network system showing a second modification of the embodiment. 1, 2. 21. 22. 31. 32... Node, 5□, 5□, 25□, 252, 35□, 35□...
・Packet determination means, 60, 6□...Data discrimination means, 26□, 26□...Packet discrimination means, 36□, 36
□・・・Packet judgment means. Agent: Patent Attorney Masayoshi Misawa: Figure 1

Claims (4)

[Claims] (1) In a network system that has a plurality of nodes and that forms packets based on control data related to image transfer, image supplementary information, and pixel data, and enables data communication in packet format between each node, A transmitting node includes a packet forming means for forming a packet by adding identifying information between the accompanying information and the pixel data, and a data discriminating means for distributing the image accompanying information and the pixel data based on the identifying information. A network system characterized in that a receiving node is provided with: (2) Consisting of multiple nodes, forming command packets based on control data related to image transfer, forming data packets based on image ancillary information and pixel data, and communicating data in packet format between each node. In a network system capable of What is claimed is: 1. A network system characterized in that a receiving node is provided with packet discriminating means for distributing image supplementary information and pixel data at the packet level. (3) The identification information is information indicating the byte length of the image supplementary information, and the packet discriminating means distributes the data packets based on this byte length.
Network system described. (4) In a network system that has multiple nodes and enables data communication in packet format between each node, a command packet is formed based on control data related to image transfer, and an attached image is attached based on image-related information. The transmitting side node is provided with a packet forming means for forming an information packet and a pixel data packet based on pixel data, and the receiving side node is provided with a packet determining means for distributing each of the packets by determining the type of the received packet. A network system characterized by: