JPH10313335A - Data transmission method for server computer, recording medium and server computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the server computer, in which data are not concentrated on a port of a switching hub, even when processing requests are made simultaneously from a plurality of terminal computers connecting to a same port of the switching hub. SOLUTION: A port management control means 300 extracts a port number of a switching hub to which terminal computers, being transmission destinations of a return data packet group, are connected based on a content of a data processing request packet. Then a port discrimination means 400 discriminates whether or not the port number extracted by the port management control means 300 is the same for return data packets generated, based on data- processing request packets received precedingly and succeedingly, and a transmission adjustment control means 500 adjusts the transmission timing of a return data packet group corresponding to a succeeding data-processing request packet, when the port discrimination means 400 denotes consecutive same port numbers. Thus, the concentration of return data packets to the same port is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a data transmission method of a server computer and a server computer, and more particularly to a data transmission method of a server computer incorporated in a data transmission system and a server computer.

[0002]

2. Description of the Related Art FIG. 17 is a block diagram showing an outline of a conventional data transmission system using a server computer.

[0003] A plurality of terminal computers 12 are connected to a server computer 11 via a switching hub 13 having a packet switching function, and in response to a request from the terminal computer 12, the server computer 11 sends necessary data to the terminal computer. 12.

FIG. 15 shows a more detailed example of the above-mentioned conventional network data transmitting apparatus. The server computer 11 has a card 130 (k) comprising a local CPU 131 (k), a local memory 132 (k), and a local disk 133 (k) (k is a suffix for distinguishing each card, and in FIG. 7), k transmission-dedicated ports Ps ₁ (k) corresponding to each card 130 (k), and one reception-dedicated port Pr ₁ .

The switching hub 13 has a k corresponding to the transmission-only port Ps ₁ (k) of the server computer 1.
The port Ps ₂ (k) and the port Pr ₂ corresponding to the reception-only port Pr ₁ of the server computer 11 are provided, and a plurality (FIG. 1) corresponding to the terminal computer 12.
3 in the case of 5) ports p (a) to p (c) are provided. One or more terminal computers 12 can be connected to each of the ports p (a) to p (c). In FIG. 15, three terminal computers 12-1 to 12-12 are connected to the port p (a). -3 of 3
One terminal computer 12-4, 12-5 is connected to each of the ports p (b) and p (c).

The local disk 133 (k) of the server computer 11 forms one logical storage space as a whole, and one data is physically stored in a distributed manner, for example, every 1 kilobyte. ing.

FIG. 16 is a functional block diagram showing a more detailed configuration of the server computer 11, and the operation procedure of the conventional system will be described below in more detail. If the terminal computer 12-1 issues a data processing request packet Pd ₁ as shown in FIG. 17 (a), the data processing request packet Pd ₁ than the terminal computer 12-1, the port p (a switching hub 13 ) And transmitted to the server computer 11 via the port Pr ₂ (to the receiving-only port Pr ₁ ). Incidentally, as the data processing request packet Pd ₁ shown in FIG. 17 (a), (address of the server computer) destination information, transmission source information (address of the terminal computer that issued the data processing request), the data read request Data read request information indicating that there is, a file number, an address of data to be read (an address on a logical recording area constituted by the entire local disk), and a data size are listed.

The data processing request packet Pd ₀ received by the packet receiving unit 101 of the server computer 11
Is passed to the packet processing unit 102, where the content of the processing request is decrypted and passed to the data processing unit 103.

As a result, the data processing section 103 instructs the data reading section 105 provided in the local CPU 131 (k) of each card 130 (k) to read from a predetermined address. The data reading unit 105 reads the data specified from the local disk 133 (k) of each card 130 (k) to the local memory 132 (k) based on the above instruction.

Further, the data processing unit 103 sends the returned data packet processing unit 104 of each card 130 (k) to FIG.
Pass 7 the return processing request packet Ps ₁ shown in (b), the instruction to incorporate data read into the local memory 132 (k) as described above to the packet. The return data packet group formed by each card 130 (k) in this manner is transmitted by the packet transmitting unit 106 via the port Ps ₁ (k) corresponding to each card 130 (k). As shown in FIG. 17 is the return processing request packet Ps ₁ (b), destination information (address of the destination terminal computer), (address of the server computer 11) source information, the packet number, reads the address of the data (Address of the data to be read from the head of each local disk) and the data size.

The return data packet thus transmitted is input to the switching hub 13, where it is temporarily stored in the buffer of the port P (a) corresponding to the terminal computer 12-1 of the return destination, and the port P (a) is stored. a) is output from
Since the address of the output data packet is described in the header portion, the data packet is received by the terminal computer 12-1 corresponding to the address. Terminal computer 1 receiving the return data packet group
2-1 edits the returned data packet group in the original order and uses it for its own purpose.

Since the single size of the return data packet may exceed the maximum packet size allowed to flow on the network, the return data packet as a whole is composed of a plurality of data packets (for example, eight return data packets). In general, it is composed of a packet group in which a packet is one unit. For example, in Ethernet, the maximum packet size is 1.5 kbytes, but data transfer up to 8 kbytes is possible as one return data packet. Therefore, in the above example, one unit of data is constituted by a data packet group of 8 kbytes in total of 1 kbyte from each of the eight local disks 133 (k).

[0013]

In the above system configuration, a group of return data packets may be transmitted almost simultaneously and continuously to a specific port of the switching hub 13 to which the terminal computer 12 is connected. is there.

For example, the port P of the switching hub 13
terminal computers 12-1 and 12-2 connected to (a)
When a processing request is issued almost at the same time, two units of return data packets [(return data) to be received by the two terminal computers 12-1 and 12-2 at the port P (a) of the switching hub 13 almost simultaneously. (The number of return data packets of the packet group) × 2].

Further, for example, computers 12-1 to 12-12
-3, the data processing request packet Pd ₀ is transmitted to the server computer 11 almost at the same time, the switching hub 13 similarly outputs [(return data packet group return data packet group). (Number) × 3] is returned.

The port P (a) of the switching hub 13
Has a buffer, but when a large amount of data is concentrated at once as described above, the capacity of the buffer may be exceeded. When data having a size larger than the size of the buffer is input to the buffer, data that cannot be stored in the buffer is discarded, and the data sent from the server computer 11 is partially lost. Computer 12-1 or terminal computer 1
In systems where real-time properties are required, such as systems that handle video data,
There has been a problem that a problem such as interruption of a moving image occurs.

The present invention has been proposed in view of the above-mentioned conventional circumstances. Even if a processing request is issued from a plurality of terminal computers connected to the same port of a switching hub at the same time, the port of the switching hub is not required. It is an object of the present invention to provide a server computer in which data is not concentrated on a server.

[0018]

The present invention employs the following means to achieve the above object. First the present invention response data to the received data processing request packet Pd ₀ sent from any of the plurality of terminal computers on the network through a specific port of the switching hub 13, corresponding to the data processing request packet Pd ₀ to form a group of packets, which assumes the server computer 11 to send back the response data packets to the terminal computer 12 that issued the data processing request packet Pd ₀ via the specific port.

[0019] In the server computer 11, first, it includes a port management control unit 300, the data processing based on the contents of the request packet Pd _0, above the destination of the terminal computer 12 of the return data packets is connected The port number of the switching hub 13 is extracted.

Next, a port determination means 400 is provided, and the return data packet formed on the basis of the data processing request packet Pd ₀ received before and after is the same as the port number extracted by the port management control means 300. Is determined.

Further, an output adjustment control means 500 is provided,
The determination in said port judging means 400, when the same port number is continuous, and to adjust the transmission timing of the response data packets corresponding to the data processing request packet Pd ₀ after the.

The output adjustment control means 500 includes a timer 1109 for controlling a transmission time interval of a return data packet group.
Or a dummy insertion processing unit 1209 that inserts a dummy packet between two preceding and succeeding return data packet groups.
It may be.

When the dummy insertion processing unit 1209 is used, the order changing means 800 changes the port numbers of the return data packet group before and after the port number obtained from the port management control means 300 based on a predetermined rule. If the port discriminating unit 400 is activated after the sending order of the return data packet group is changed so that the numbers do not become the same as much as possible, the number of times of sending the dummy packet is reduced.

A return processing request packet corresponding to the data processing request packet is formed, and a return data packet group is formed by transmission processing means based on the return processing request packet. A processing request packet buffer for storing the packet in the area corresponding to the port number extracted by the management control means may be provided. In this case, the output adjustment control means 500
Stores a dummy processing request packet in an area of the processing request packet buffer where no return processing request packet is stored. Then, the return processing request packet or the dummy processing request packet is sequentially extracted from the area of the processing request packet buffer corresponding to the different port number by the transmission packet processing unit.

Here, the dummy packet has an address corresponding to a port to which the terminal computer 12 that is the source of the data processing request is not connected.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The basic system configuration of a data transmission system using a server computer to which the present invention described below is applied is exactly the same as the configuration shown in FIG. 17, so that detailed description is omitted here. I do. In the following description, a more specific example of the configuration shown in FIG.
However, since the description of FIG. 15 has already been made, it is omitted here. (Embodiment 1) FIG. 1 is a functional block diagram of a server computer showing an embodiment of the present invention.

The server computer 11 is a reception processing unit 1
00, data processing means 200, port management control means 300, port determination means 400, output adjustment control means 500, transmission processing means 600 (k), and reading means 70
0 (k), and the transmission processing means 600 (k) and the reading means 700 (k) are provided in each of the cards 130 (k).

The reception processing means 100 comprises a packet receiving unit 1101 and a packet processing unit 1102, and receives a data processing request packet Pd ₀ received from the terminal computer 12.
, The receiving process described below is performed. Together with the data processing means 200 issues a read command based on the data processing request packet Pd ₀ to the read means 700 (k) of each card 130 (k), and generates a return processing request packet, return of the following It is designed to be used for processing. The port management control means 300 includes ports P (a) to P (c) of the switching hub 13 to which the terminal computers 12-1 to 12-5 are connected (hereinafter referred to as P (n), and n Represent port numbers a, b,...)).
When the return processing request packet from the data processing means 200 is obtained, the port number (n) of the switching hub 13 is obtained based on the address of the return destination terminal computer 12 included in the return processing request packet. It comprises a port acquisition unit 1104.

The port determining means 400 determines whether two consecutive return processing request packets have the same port P (n). Further, output adjustment control means 5
00 is constituted by a timer 1109 which is started when the port determination means 400 determines that two consecutive return processing request packets are "the same". Also, the transmitting means 600 (k) includes a return packet processing unit 11 for generating a return data packet based on the instruction of the output adjusting means 500.
06 and a packet transmission unit 1111. Furthermore, the reading means 700 (k)
(k) is incorporated as a program in the local CPU 131 (k), and reads predetermined data from a logical storage area of the local disk (k) of each card 130 (k) based on the instruction of the data processing means 200. Has become.

FIG. 2 is a flow chart showing the operation procedure of the server computer 11, and a more detailed configuration of the server computer 11 and its operation will be described below with reference to FIGS.

The packet receiving unit 1101 of the receiving processing means 100 receives the data processing request packet Pd ₀ shown in FIG. 4A (same as FIG. 17A) from the network,
The packet is transferred to the packet processing unit 1102. Packet processing unit 1
102 analyzes the request content of the received packet and passes it to the data processing means 200 (FIG. 2, step S1101 → S
1102 → S1103). As a result, the data processing means 200 reads the necessary data in accordance with the instruction content of the data processing request packet so that each local CPU 1
131 instructs the reading means 700 (k) incorporated in (k), generates a return processing request packet Ps ₀ shown in FIG. 4 (b) to form the response data packet, the next stage of the port management control Port acquisition unit 1 constituting means 300
Transfer to 104.

FIG. 4 (b) As is apparent than in the above-mentioned return processing request packet Ps _0, similarly to the conventional return processing request packet Ps ₁ shown in FIG. 2 (d), and destination information (destination Address of terminal computers 12-1 to 12-5), source information (address of server computer 11), packet number, local disk 13 of data to be read out
Address and data size on 2 (k)
Further, a port number storage area for storing the port number (n) of the switching hub obtained by the following processing is provided.

As shown in FIG. 3, the port management unit 1107 stores in advance the addresses of the terminal computers 12-1 to 12-5 and the switching hub 13 to which the terminal computers 12-1 to 12-5 are connected. Port number of port P (n)
(n) is stored correspondingly.

In this state, as described above, the return processing request packet Ps ₀ is sent from the data processing unit 200 to the port acquisition unit 1.
Is input to 104, the port acquisition unit 1104 from the port management unit 1107, the terminal computer 12-1 written the return processing request packet Ps ₀ as described above
Get the number (n) of 12-5 of the address and the corresponding port P (a) ~P (c) , and writes the port number (n) to the port number field of the return processing request packet Ps _0.

When the writing of the port number (n) is completed as described above, the judging unit 1105 constituting the port judging means 400 at the next stage is started. The determination unit 1105 receives the return processing request packet Ps ₀ from the port acquisition unit 1104, reads out the port number (n), and reads the port number (n) and the port number of the previous return processing request packet.
(n) is compared with the contents of the port holding unit 1108 that stores (step S1104 → S1105 in FIG. 2).

Here, if the port numbers (n) described in two consecutive return processing request packets Ps ₀ are the same, the timer 1109 as the output adjustment control means 500 is started (FIG. 2, step S1106).

A return packet processing unit 1106 constituting the transmission processing means 600 (k) provided in each card 130 (k)
Indicates that the switching hub port determination unit 1105 does not determine “same” or that the timer 1109
Is activated when the time is up, while each card 1
The data reading means 700 (k) incorporated in the local CPU 131 (k) of the 30 (k)
According to the instruction of 0, the corresponding data is read out and read out to the local memory 132 (k).

In this state, the return packet processing unit 1106 activated as described above refers to the contents of the return processing request packet Ps ₀ to form a header part of the return data packet, and also returns to the local memory 132 ( k) Obtain more necessary data and incorporate it into the returned data packet. As a result, the return data packet is transferred to the packet transmission unit 1111 and transmitted to the network (FIG. 2, steps S1108 → S1109).

According to the present embodiment, when a group of data packets to be returned to the terminal computer connected to the port P (n) of the same switching hub is continuous, the data packets are transmitted at necessary time intervals. That is, one unit of return data packet group (eight 1 kbyte data packets in this case) stored in the buffer of the specific port P (n) of the switching hub 13 is unprocessed and the next return data packet No groups are entered and no part of the data is discarded beyond the capacity of the buffer. (Embodiment 2) FIG. 5 is a functional block diagram showing another embodiment of the present invention.

Since the configuration and function of the reception processing means 100 (packet receiving section 1101 and packet processing section 1102) and the data processing means 200 constituting the server computer 11 are not different from those of the first embodiment, the same reference numerals as in FIG. The description is omitted here.

The port management control means 300 stores the port number (n) of each port P (n) in association with each of the terminal computers 12-1 to 12-5, similarly to the configuration of the first embodiment. It comprises a unit 1107 and a port acquisition unit 1204 for acquiring the port number (n) of the switching hub 13. In the present embodiment, the port acquisition unit 1204 is started by a timer 1210 at predetermined time intervals.

Judgment unit 12 as port judgment means 400
05 is a port number for a plurality of return processing request packets Ps ₀ stored in the processing request packet buffer 1208
It is determined whether or not (n) is the same. The output adjusting means 500 includes a dummy insertion processing section 1209 which is activated when the port determining means 400 determines that the values are "the same".

FIGS. 6, 7 and 8 are flowcharts showing the procedure of this embodiment. Hereinafter, a more detailed configuration and operation procedure of the server computer will be described with reference to FIGS. 5, 6, 7, and 8.

The procedure from when the data processing request packet Pd ₀ shown in FIG. 4A is received from any of the terminal computers 12-1 to 12-5 and the decoding result is input to the data processing means 200 ( FIG. 6, step S1201 → S120
2 → S1203) is the procedure shown in the first embodiment (FIG. 2,
Steps S1101 → S1102 → S1103) are the same as those in steps (S1101 → S1102 → S1103), and a description thereof is omitted.

The data processing means 200 includes the packet processing unit 1
A return processing request packet Ps ₀ shown in FIG. 4B is generated based on the data processing request packet Pd ₀ received from 202, and is sequentially stored in the processing request packet buffer 1208 (FIG. 6, step S1204). Activate the data reading means 700 (k) of each card 130 (k) to read the requested data.

On the other hand, the timer 1210 constituting the port management control means 300 activates the port acquisition section 1204 constituting the port management control means 300 at predetermined time intervals, whereby the port acquisition section 1204 operates the processing request packet buffer. The return processing request packet Ps ₀ stored in 1208 is fetched, and the destination information which is the address corresponding to the terminal computers 12-1 to 12-5 written in the return processing request packet Ps ₀ is referred to. The port number (n) stored in the switching hub port management unit 1207 corresponding to the destination information is acquired (FIG. 7, step S1210).

Here, the timer 1210 is set to a time (for example, 100 times) longer than the time required for the data processing means 200 to process the data processing request packet Pd _0. Although there is a possibility that the request packet Ps ₀ is stored, the port number (n) acquisition processing is performed collectively for the plurality of return processing request packets Ps ₀ .

[0048] with thus obtained port number (n) is written to a predetermined port number field of the return processing request packet Ps _0, the port number (n) of a bounce processing request packet Ps ₀ written It is written into the processing request packet buffer 1208 again, and then the port determination means 400 is started.

The judging unit 1205 constituting the port judging means 400 sends the port number (Ps ₀ ) of two consecutive return processing request packets Ps ₀ in which the port number (n) is written from the processing request packet buffer 1208 as described above. n) is taken out, and it is determined whether or not the acquired port number (n) of the switching hub 13 is the same (step S1211 in FIG. 7). When two or more return processing request packets Ps ₀ are stored, this procedure is sequentially repeated.
Here, if there is a determination of “same”, the dummy insertion processing unit 1209 as the output adjustment control unit 500 is activated, and the dummy insertion processing unit 1209 processes the corresponding two return processing request packets Ps ₀ . Request packet buffer 120
8 and the two return processing request packets Ps ₀
During this time, a dummy processing request packet is inserted and stored again in the processing request packet buffer 1208 (FIG. 7, steps S1213 → S1214 → S1215).

Upon completion of the comparison processing, the port determination means 400 determines if necessary the dummy insertion processing unit 1209
Then, the return packet processing unit 1206 constituting the transmission processing means 600 (k) is started. The return packet processing unit 1206 takes out at once the return processing request packet Ps ₀ and dummy processing request packet is stored in the processing request packet buffer 1208 as shown in FIG. 8, each return processing request packet Ps ₀ Using the contents, a header portion of the return data packet is created in the same manner as in the prior art, and a return data packet incorporating the data obtained by the data reading means 700 (k) is sequentially formed and passed to the packet transmitting portion 1213, (FIG. 8, step S1230 → S1231 → S1233
→ S1234). In addition, dummy processing is performed on the dummy processing request packet (FIG. 8, step S123).
2).

Here, various forms of the dummy processing can be considered. For example, when the destination information is connected to a port other than the port to which the terminal computer 12 to which the processing request is currently issued is connected. Terminal computer 12 or server computer 11
It is conceivable to send a dummy data group to the port. As the dummy data, for example, NULL
A method of forming a data packet by the return packet processing unit 1208 is conceivable.

As described above, when the return data packet group is continuously transmitted to the terminal computer connected to the same port P (n) of the switching hub, a dummy process is performed between them. Port P (n)
Since a large amount of data packets do not concentrate on the terminal computer 1 at a time,
2 will be delivered. (Embodiment 3) FIG. 9 is a functional block diagram showing another embodiment of the present invention.

Since the configuration and function of the reception processing means 100 (packet receiving section 1101 and packet processing section 1102) and the data processing means 200 constituting the server computer 11 are not different from those of the first embodiment, the same reference numerals as those in FIG. The description is omitted here. Further, since the configuration and function of the port management control unit 300 are not different from those of the second embodiment, the same reference numerals as those in FIG.

In this embodiment, the order of the return processing request packet Ps ₀ is changed based on the port number (n) obtained by the port obtaining unit 1204 so that the same port number (n) is not continuous as much as possible. An order changing means 800 is provided. The determination unit 1205 (having the same function as that of the second embodiment) constituting the port determination unit 400 for the return processing request packet Ps ₀ whose order has been changed in this way has the same return destination port of the continuous return processing request packet Ps _0. Is determined.

Hereinafter, the dummy insertion processing section 1209 as the output adjustment control section 500 and the transmission processing section 600 (k) (return packet processing section 1206, packet transmission section 1213)
Is the same as that of the second embodiment, and the description is omitted using the same reference numerals.

FIG. 10 is a flowchart showing the operation procedure of this embodiment. Hereinafter, a more detailed configuration and operation procedure of the server computer will be described with reference to FIGS. Receiving a data processing request packet Pd ₀ from any of the terminal computers 12-1 to 12-5, the description and because the procedure up to the decoding result is input to the data processing means 200 is the same as Example 1 The drawing display is omitted.

The data processing means 200 generates the return processing request packet Ps ₀ shown in FIG. 4B, and stores the return processing request packet Ps ₀ in the processing request packet buffer 1208 sequentially. Data reading means 7 of each card 130 (k) for reading the read data.
The procedure for activating 00 (k) is the same as in the second embodiment.

Further, the port acquisition unit 1204 constituting the port management control means 300 is started at predetermined intervals by the timer 1210, whereby the port acquisition unit
The procedure for acquiring the port number (n) corresponding to the destination information from the port management unit 1207 by referring to the destination information written in the return processing request packet Ps ₀ is the same as that in the second embodiment. .

Further, the port number obtained as described above
(n) is also written in the port number area of the return processing request packet Ps ₀ and stored again in the processing request packet buffer 1208 as in the second embodiment (FIG. 1).
0, step S1410, and step S1210 in FIG. 7).

[0060] Change the order of the return processing request packet Ps ₀ is written thus obtained port number (n) in the present embodiment, performs port determination processing. That is, the return processing request packet P after writing the port number (n) stored in the processing request packet buffer 1208
The order s ₀ is taken into the order changing means 800, where the order of the return processing request packet Ps ₀ is changed according to a predetermined rule so that the order of the port numbers (n) is not the same as much as possible (FIG. 10, FIG. Step S1411). For example, the physical port P (n) of the switching hub 13
The arrangement order of the return processing request packets Ps ₀ is changed so as to be as same as the arrangement order of the return processing request packets Ps _0. The judging unit 1205 constituting the judging means 400 is started.

As described in the second embodiment, the judging unit 1205 outputs, from the processing request packet buffer 1208, two consecutive return processing request packets Ps ₀ in which the port number (n) is written as described above. The port number (n) is extracted, and it is determined whether the acquired port number (n) of the switching hub 13 is the same. Here, if "same", to start the dummy insertion processing unit 1209 as the output adjustment control means 500, the dummy insertion processing unit 1209 corresponding two return processing request packet Ps ₀ data processing request packet buffer ₁ , a dummy processing request packet is inserted between the two return processing request packets Ps ₀ and stored again in the processing request packet buffer 1208 (FIG. 10, step S14).
13 → S1414 → S1415).

Hereinafter, since the transmission processing means 600 (k) is activated to form a return data packet, and a dummy packet is formed and transmitted, it is completely the same as in the case of the second embodiment. And the drawings are omitted.

According to the present embodiment, the order of the return processing request packet Ps ₀ is changed so as not to be the same before and after as much as possible. Even if the same port P (n) continues, the same port since P (n) is so as to sandwich the dummy processing request packet between two return processing request packet Ps ₀ consecutive, in the state number of transmissions of the dummy packets is small on a server computer, a specific port P
It is possible to prevent data packets from being concentrated on (n). (Embodiment 4) FIG. 11 is a functional block diagram showing another embodiment of the present invention, and FIG. 12 is a flowchart showing an operation procedure of the present embodiment. Hereinafter, the configuration and operation procedure of the server computer will be described with reference to FIGS.

[0064] receiving a data processing request packet Pd ₀ from any of the terminal computers 12-1 to 12-5, the procedure up to the decoding result is input to the data processing means 200 is the same as Example 1 Therefore, the description and the drawing display are omitted (FIG. 12, steps S1501 → S1502 → S1
503).

Further, the data processing means 200 generates the return processing request packet Ps ₀ shown in FIG.
The return processing request packet Ps ₀ is sent to the next port acquisition unit 1
404 and the data reading means 70 of each card 130 (k) to read the requested data.
The procedure for activating 0 (k) is the same as in the first embodiment.

Further, the port acquisition unit 1404 constituting the port management control means 300 is provided with the data processing means 200
When the return processing request packet Ps ₀ is input, the destination information written in the return processing request packet Ps ₀ is referred to, and the port number (n) corresponding to the destination information is determined by the port management unit 1207. acquires, procedure for writing the port number (n) to the port number storage area of the return process request packet Ps ₀ is the same as in example 1.

In the present embodiment, the return processing request packet Ps _{0 in} which the port number (n) is written is
4 is stored in a predetermined area of the processing request packet buffer 1408. That is, the processing request packet buffer 1408 in this embodiment, has a structure prepared port number (n) area for each of the return destination of the return processing request packet Ps _0, return processing request packet Ps ₀ is the The data is sequentially stored in an area corresponding to the port number (n) written by the port acquisition unit 1404 (FIG. 12,
Step S1504).

Hereinafter, the storing operation of the return request packet Ps ₀ will be described in more detail with reference to FIG.
FIG. 13A shows that the return port P (n) is the port P (n).
(a), the port P (b), and the port P (c).
As shown in the figure, the processing request packet buffer 1408 stores (a), (b), and (c) in which each column (row) is the return destination port number (n). Correspondingly,
Each row (column) has a matrix structure indicating the input order of each return processing request packet Ps ₀ (here, for the sake of explanation, for example, the area specified by (1) row (a) is represented by “(1) (a)
Area "). Return processing request packet Ps
₀ is stored in the column corresponding to the written port number (n) in the order of (1) → (2) → (3) → (4) (described below).

For example, seven consecutive return processing request packets Ps ₀ (the port numbers (n) written are “(a), (a), (b), (a), (c), (c) c), (a) each of the "to be)," Ps ₀ _1 (a) "," Ps ₀ _2 (a)
"," Ps ₀ _3 (b) "," Ps ₀ _4 (a) "," Ps ₀ _
5 (c) "," Ps ₀ _6 (c) ", when it is expressed as" Ps ₀ _7 (a) ", returns processing request packet Ps ₀ Seven of these successive shown in FIG. 13 (b) In the area, they are sequentially stored (in the order of the arrows shown in the figure). That is, first, the return processing request packet Ps ₀ _1 (a) is
(1) Stored in the area (a), and then the return processing request packet Ps ₀ _2 (a) is stored in the area (2) (a) in the next stage. Subsequently, a return processing request packet Ps ₀ _3 (b) having the return destination port number (n) of (b) is stored in the area (1) (b), and up to Ps ₀ _7 (a) in this order. Will be stored.

Here, the output control means 500 of this embodiment
Is composed of a dummy insertion processing unit 1409 and a timer 1410 for activating the dummy insertion processing unit 1409 at predetermined time intervals (the functions of the dummy insertion processing unit 1409 and the timer 1410 are the same as those in the third embodiment. is there).

When the timer 1410 times out, the port acquisition unit 1404 suspends the write processing to the processing request packet buffer 1408, and the dummy insertion processing unit 1409 sets the processing request packet buffer 1408
And insert a dummy processing request panel into an empty area. That is, when the above-mentioned seven consecutive return processing request packets Ps ₀ are stored in the processing request packet buffer 1408, (2) (b) area, (3) (b) area, (4) (b) area,
The (3) (c) area and the (4) (c) area are empty areas, and the dummy insertion processing unit 1409 sends the dummy processing request to these empty areas as shown in FIG. Packets (P _{dummy —} 1, P _{dummy —} 2, P _{dummy —}
3, P _{dummy —} 4 and P _{dummy —} 5).

The dummy insertion processing unit 1409 performs the above-described insertion processing.
Is completed, the transmission constituting the transmission processing means 600 (k)
The packet processing unit 1406 is activated. The return packet processing
The processing unit 1406 performs the above-described processing as shown in FIG.
Return processing stored in request packet buffer 1408
Request packet Ps₀And the dummy processing request packet
Port number (n) Take out sequentially. That is, the dummy insertion
The input processing unit 1409 determines that “Ps₀_1 (a) → Ps₀_3 (b) →
Ps₀_5 (c) → Ps₀_2 (a) → P_dummy_1 → Ps₀_6
(c) → Ps₀_4 (a) → P_dummy_2 → P_dummy_3 → P
s₀_7 (a) → P _dummy_4 → P_dummy_5 ”
Transmission processing request packet Ps₀Or a dummy processing request packet
Will be taken out, and thus the return processing request packet
Ps₀(Dummy processing request packet)
Return request packet with the same return destination port number (n).
To Ps₀Can be prevented from continuing.

Hereinafter, a return data packet and a dummy packet are formed by the return packet processing unit 1406.
The point that the return data packet is transmitted by the packet transmission unit 1213 is exactly the same as in the case of the third embodiment, and thus the description and the illustration display are omitted.

As described above, according to the present embodiment, the dummy packet is inserted only at the place where the output adjustment processing is required without providing the port determination means 400, and therefore, the load on the CPU processing can be reduced. Can be.

The timing at which the port acquisition unit 1404 starts writing to the processing request packet buffer 1408 is not particularly limited, but may be, for example, when the timer 1410 next times up, and The processing may be performed when the processing unit 1406 completes the process of extracting the return processing request packet Ps ₀ and the dummy processing request packet.

Further, it goes without saying that the data transmission method shown in each of the above embodiments can be similarly realized by using a recording medium such as an optical disk in which the data transmission method is incorporated as a program.

[0077]

As described above, the present invention adjusts the output timing of the return data packet group when the return data packet group to the terminal computer connected to the same port of the switching hub is continuous. Therefore, the next return data packet group is not input while the return data packet group of one unit stored in the buffer of the specific port of the switching hub is unprocessed. Some of the data will not be discarded.

As means for adjusting the output timing of the return data packet group, it is conceivable to delay the transmission of the subsequent return data packet temporally, or to insert a dummy packet between the preceding and following return data packets.
When a dummy packet is sandwiched, the order of the destination ports of the return data packet before and after is adjusted so that the destination port is not connected to the same port as much as possible, so that the object of the present invention can be further effectively achieved.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart showing an operation procedure of the embodiment of FIG. 1;

FIG. 3 is a conceptual diagram showing storage contents of a port management unit.

FIG. 4 is a conceptual diagram showing a data processing request packet and a return processing request packet.

FIG. 5 is a functional block diagram showing another embodiment of the present invention.

6 is a flowchart showing an operation procedure of the embodiment in FIG.

FIG. 7 is a flowchart showing an operation procedure of the embodiment of FIG. 5;

8 is a flowchart showing an operation procedure of the embodiment in FIG.

FIG. 9 is a functional block diagram showing another embodiment of the present invention.

FIG. 10 is a flowchart showing an operation procedure of the embodiment in FIG. 9;

FIG. 11 is a functional block diagram showing another embodiment of the present invention.

FIG. 12 is a flowchart showing an operation procedure of the embodiment in FIG. 11;

FIG. 13 is a conceptual diagram showing a processing request packet buffer of the embodiment in FIG.

FIG. 14 is a functional block diagram showing an outline of a conventional system.

FIG. 15 is a functional block diagram showing a more detailed outline of a conventional system.

FIG. 16 is a functional block diagram showing a more detailed configuration of a server computer.

FIG. 17 is a conceptual diagram showing a conventional data processing request packet and a return processing request packet.

[Explanation of symbols]

Reference Signs List 11 server computer 12 terminal computer 13 switching hub 200 data processing means 300 port management control means 400 port discrimination means 500 output adjustment control means 600 transmission processing means Ps ₀ return processing request packet Pd ₀ data processing request packet

Claims (23)

[Claims] 1. A data processing request transmitted from one of a plurality of terminal computers on a network is received via a specific port of a switching hub, and a return data packet group corresponding to the data processing request is formed. A data transmission method of a server computer for returning the return data packet group to the terminal computer which has issued the data processing request via the specific port, the transmission of the return data packet group based on the content of the data processing request. A port number extracting step of extracting a port number of the switching hub to which the terminal computer is connected; and a return data packet group formed in response to a data processing request received before and after the port hub. Port determination step for determining whether the port numbers are the same , By the determination, when the same port number is continuous,
A data transmission method for a server computer, comprising: an output adjusting step of adjusting the transmission timing of a return data packet group corresponding to the above-mentioned data processing request. 2. The data transmission method for a server computer according to claim 1, wherein said output adjustment step controls a transmission time interval of a return data packet group. 3. The data transmission method for a server computer according to claim 1, wherein a dummy packet is interposed between two return data packet groups before and after the output adjustment step. 4. After changing the transmission order of the return data packet with respect to the port number obtained from the port number extraction step based on a predetermined rule so that the preceding and following port numbers are not the same as much as possible, 4. The method according to claim 3, wherein the port determination is performed. 5. The data transmission method for a server computer according to claim 3, wherein the dummy packet is transmitted to a port other than a port to which a terminal computer that has transmitted the data processing request is connected. 6. A data processing request transmitted from any of a plurality of terminal computers on a network is received via a specific port of the switching hub, and a return processing request packet corresponding to the data processing request is formed. Further, a server computer for forming a return data packet group in a transmission processing procedure based on the return processing request packet and returning the return data packet group to the terminal computer which issued the data processing request via the specific port. In the data transmission method, based on the content of the data processing request, a port number extraction step of extracting a port number of the switching hub to which a terminal computer to which a return data packet group is transmitted is connected; The request packet buffer of the above extracted port A server computer comprising: a packet storing step of storing the packet in an area corresponding to a packet; and an output adjusting step of adjusting a timing of passing the return processing request packet stored in the processing request packet buffer to a transmission processing step. Data transmission method. 7. The server computer data transmission method according to claim 6, wherein said output adjusting step stores a dummy processing request packet in an area of said processing request packet buffer where said return processing request packet is not stored. 8. The storage of the dummy processing request packet,
The method according to claim 7, wherein the data transmission is performed at predetermined time intervals. 9. After the dummy processing request packet is stored, the return processing request packet or the dummy processing request packet is taken out from the area of the processing request packet buffer sequentially corresponding to the different port number.
3. A data transmission method for a server computer according to item 1. 10. The dummy processing request packet is sent to a port other than the port to which the terminal computer of the source of the data processing request is connected.
10. A data transmission method for a server computer according to any one of claims 1 to 9. 11. A recording medium incorporating the data transmission method according to claim 1 as a program. 12. A data processing request packet transmitted from any of a plurality of terminal computers on a network is received via a specific port of a switching hub, and a return data packet group corresponding to the data processing request packet is formed. A server computer for returning the returned data packet group to the terminal computer which issued the data processing request packet through the specific port, and transmitting the returned data packet group based on the content of the data processing request packet. A port management control unit for extracting a port number of the switching hub to which the terminal computer is connected; and a port management control unit for a return data packet formed based on a data processing request packet received before and after. Port number extracted in A port determination unit that determines whether there is a packet, and a transmission timing of a return data packet group corresponding to the subsequent data processing request packet is adjusted when the same port number is consecutive by the determination by the port determination unit. A server computer comprising output adjustment control means. 13. The server computer according to claim 12, wherein said output adjustment control means is a timer for controlling a transmission time interval of a return data packet group. 14. The output adjustment control means according to claim 1, wherein
13. The server computer according to claim 12, wherein the server computer is a dummy insertion processing unit that inserts a dummy packet between two return data packet groups. 15. An order changing means returns a port number obtained by said port management control means based on a predetermined rule so that the port numbers of the preceding and following return data packet groups do not become the same as much as possible. 15. The server computer according to claim 14, wherein the port discriminating means is activated after the order of transmitting the data packets is changed. 16. The server computer according to claim 14, wherein the dummy insertion processing unit gives the dummy packet an address corresponding to a port to which the terminal computer that has transmitted the data processing request is not connected. 17. Receiving the data processing request packet by the data processing means, forming a return processing request packet corresponding to the data processing request packet, and returning the data processing request packet based on the return processing request packet by the transmission processing means. 17. The server computer according to claim 14, wherein the dummy insertion processing unit interposes a dummy processing request packet between return processing request packets indicating the same port number in succession. Server computer. 18. A data processing request packet transmitted from any one of a plurality of terminal computers on a network is received via a specific port of a switching hub, and a return processing request packet corresponding to the data processing request packet is formed. Further, a return data packet group is formed by transmission processing means based on the return processing request packet, and the return data packet group is returned to the terminal computer that issued the data processing request packet via the specific port. In the server computer, based on the content of the data processing request packet, port management control means for extracting the port number of the switching hub to which the terminal computer to which the return data packet group is transmitted is connected; Corresponds to the port number extracted above. Server computer, wherein the process request packet buffer to be stored in the area, the more becomes possible output adjustment control means for adjusting the timing to be passed to the transmission processing means the return processing request packet is stored in the processing request packet buffer. 19. The server according to claim 18, wherein the output adjusting means is a dummy insertion processing unit that stores a dummy processing request packet in an area of the processing request packet buffer where the return processing request packet is not stored. Computer. 20. The server computer according to claim 19, wherein the storage of the dummy processing request packet is performed at predetermined time intervals. 21. A transmission packet processing unit for extracting the return processing request packet or the dummy processing request packet from the area of the processing request packet buffer sequentially corresponding to the different port number after the dummy processing request packet is stored. A server computer according to claim 19 or claim 20. 22. The dummy insertion processing unit according to claim 19, wherein the dummy processing request packet gives the dummy processing request packet an address corresponding to a port to which the terminal computer of the transmission source of the data processing request is not connected. Server computer. 23. Receiving the data processing request packet by the data processing means to form a return processing request packet corresponding to the data processing request packet, and returning the data processing request packet by the transmission processing means based on the return processing request packet. The server computer forming a data packet group, wherein the return processing request packet is provided with a port number recording area, and the port number extracted by the port management control means is written in the port number recording area to execute the return processing request. 23. The server computer according to claim 12, wherein the packet is a carrier of a port number.