JPH11259386A - Network system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a network system with which timewise inequality between client machines can be canceled. SOLUTION: This system has client machines 121-123 for respectively sending data for receiving a variety of services and the time of a timer to an internet 10 as service request data Dh1-Dh3 while being timewisely synchronized by a time server 11, server machine 14 for executing the variety of services, based on the service request data Dh1-Dh3, and storage device 16 for storing the service request data Dh1, h2 and Dh3 received by the server machine 14. Based on the service request data Dh1-Dh3 stored in the storage device 16, the server machine 14 executes the variety of services in the order of transmission time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a network system.

[0002]

2. Description of the Related Art FIG. 6 is a diagram showing a configuration of a conventional network system. In FIG. 1, reference numeral 1 denotes the Internet in which a plurality of networks around the world are connected to each other. Reference numeral 21 denotes a client machine as a computer terminal installed on the client side, which is connected to the Internet 1. This client machine 2
The storage unit (not shown) stores the service request program 31
Is stored. This service request program 31
Is a program executed by the client machine 21 when requesting various services via the Internet 1 to the server machine 4 described later.

[0003] 22 and 23 are client machines connected to the Internet 1 in the same manner as the client machine 21 described above. The storage units (not shown) of these client machines 22 and 23 store service request programs 32 and 33, respectively. These service request programs 32 and 33 are programs executed by the client machines 22 and 23 when requesting various services to the server machine 4 via the Internet 1 in the same manner as the service request program 31. .

[0006] The server machine 4 is a computer terminal installed on the service provider side and connected to the Internet 1. The server machine 4 executes various services requested from the client machines 21, 22, and 23 described above. A service processing program 5 is stored in a storage unit (not shown) of the server machine 4. The service processing program 5 performs a service requested from the client machine 21 and transmits the service contents to the Internet 1, for example. This is a program that is executed when the data is sent to the client machine 21 via the Internet.

Next, the operation of the above-described conventional network system will be described. First, assuming that the service request program 31 is executed by the client machine 21 and the service request data Ds1 is transmitted to the Internet 1 at the absolute time t1, the service request data Ds1 is transmitted at the first transmission speed, for example, at the Internet 1 speed. Is transmitted to the server machine 4 via the.

Now, assuming that the service request program 32 is executed by the client machine 22 and the service request data Ds2 is transmitted to the Internet 1 at an absolute time t2 (> t1), the service request data Ds2 is, for example, Are transmitted to the server machine 4 via the Internet 1 at a second transmission speed (> first transmission speed) higher than the above-described first transmission speed. Here, the reason why there is a difference between the first transmission speed and the second transmission speed is that the transmission speed of each transmission line in the Internet 1 changes depending on the transmission capacity and the traffic volume.

Now, after the service request data Ds2 is received by the server machine 4, the service request data Ds1
Is received by the server machine 4. Thus, the server machine 4 executes the service processing program 5 on a first-come, first-served basis. That is, the server machine 4 executes a service according to the service request data Ds2 received first, and then executes a service according to the service request data Ds1 received next.

[0008]

By the way, in the conventional network system, since the data transmission speed of each transmission line in the Internet 1 is different, the service request data Ds1 is replaced with the service request data Ds2 as described above.
Despite being transmitted to the Internet 1 earlier, the service request data Ds2 is
It is received by the server machine 4 earlier. In the conventional network system, the server machine 4
Are service request data Ds1 and service request data Ds2
Services are executed in the order in which they are received, regardless of the transmission time. Therefore, in the conventional network system, for example, when a service having a high real-time property such as an auction service or a reservation service is executed by the server machine 4, there is a problem that time inequality occurs between client machines (clients). there were.
Specifically, in the reservation service, although the client of the client machine 21 has made a reservation before the client of the client machine 22, the client of the client machine 22 is more advanced than the client of the client machine 21 on the server machine 4 side. Time unfairness that a reservation is made for a second time. The present invention has been made in view of such a background, and an object of the present invention is to provide a network system that can eliminate time inequality between client machines.

[0009]

According to a first aspect of the present invention, there is provided a network, a plurality of client machines each having a timer, respectively installed on a plurality of clients and connected to the network, and the plurality of clients. A time synchronization unit that synchronizes the time of each timer in the client machine; a server machine installed on the service provider side and connected to the network; and a storage unit built in the server machine; Sends out the time data at the time of sending out the service request data to the server machine via the network, obtained from the timer together with service request data for requesting a service to the server machine, and the server machine The service request data and the time data are stored in the order of arrival. Together is stored in the stage, and performing the processing based on the service request data in order delivery time is earlier obtained from said time data. According to a second aspect of the present invention, in the network system according to the first aspect, the server machine includes:
When one of the service request data and the time data arrives, the storage order of the plurality of service request data is rearranged in the order of earlier transmission time obtained from the time data, and the service request data of the first address in the storage means is stored. The processing is performed in order from. According to a third aspect of the present invention, in the network system according to the second aspect, after the service request data is stored in the head address, the server machine may execute the network after a maximum delay time in the network has elapsed. After the service request data is processed, the processed service request data is deleted from the storage unit.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a network system according to an embodiment of the present invention. In this figure, reference numeral 10 denotes the Internet in which a plurality of networks around the world are connected to each other. 1
Reference numeral 1 denotes a time server connected to the Internet 10, which is used when time synchronization is performed in client machines 121 to 123 described later. That is, when time request data Dk1 to Dk3, which will be described later, are transmitted from the client machines 121 to 123, the time server 11 transmits time data T1, T2, and T3 indicating the absolute time to the Internet 10.

The client machine 121 is a computer terminal installed on the client side, and is connected to the Internet 10. This client machine 1
A service request program 131 is stored in a storage unit 21 (not shown). The service request program 131 is a program executed by the client machine 121 when requesting various services to the server machine 14 described later via the Internet 10. The execution contents of the service request program 131 will be described later.

Further, the client machine 121 periodically outputs time request data Dk1 for requesting the time data T1 to the time server 11 at fixed time intervals, and outputs a timer (not shown) to the absolute time obtained from the time data T1. Set the time. That is, the client machine 121
Periodically obtains the time data T1 and corrects the time of the timer. Further, the client machine 121 sends service request data for receiving various services to the server machine 14 and time data of a timer to the Internet 10 as service request data Dh1.

The client machines 122 and 123 are:
These are computer terminals connected to the Internet 10 in the same manner as the client machine 121 described above. Each storage unit (not shown) of these client machines 122 and 123 stores a service request program 132
And 133 are each stored. These service request programs 132 and 133 are programs executed by the client machines 122 and 123 when requesting various services to the server machine 14 via the Internet 10, similarly to the service request program 131. . The execution contents of these service request programs 132 and 133 will be described later.

The client machines 122 and 1
23 periodically outputs time request data Dk2 and Dk3 for requesting the time data T2 and T3 from the time server 11, respectively, at regular time intervals, and outputs the time data T2 and T3.
And the time of a timer (not shown). That is, the client machines 122 and 123 periodically acquire the time data T2 and T3 and correct the time of the timer. Further, the client machines 122 and 123 transmit service request data for receiving various services to the server machine 14 and time data of a timer to the Internet 10 as service request data Dh2 and Dh3.

The server machine 14 is a computer terminal connected to the Internet 10 provided on the service provider side.
Various services required from 122 and 123 are executed. A service processing program 15 is stored in a storage unit (not shown) of the server machine 14. The service processing program 15 performs a service requested from the client machine 121 and transmits the service content to the Internet 10, for example. Client machine 1 through
21 is a program that is executed when the data is sent to the PC 21. The execution contents of the service processing program 15 will be described later. A storage device 16 stores the service request data Dh1, Dh2, and Dh3 received by the server machine 14.

FIG. 2 is a block diagram showing the configuration of the server machine 14 described above. In this figure, parts corresponding to the respective parts in FIG. 1 are denoted by the same reference numerals. 17 shown in FIG.
Is a control unit that executes the service processing program 15 and controls each unit of the apparatus. This control unit 17
The details of the operation will be described later. The storage device 16
It has a plurality of storage areas for storing service request data and data of the absolute time at which the service request data was transmitted, and addresses 0 to n are assigned to each storage area. Here, address 0 is referred to as a head address.

Reference numeral 18 denotes a monitoring unit that monitors the time from when the service request data Dh1, Dh2, and Dh3 arrive at the control unit 17, and the like. Further, the monitoring unit 18 has a timer function of measuring time using a plurality of timers (not shown). These timers store the service request data Dh1, Dh2
And Dh3. Hereinafter, the result of counting by each of the timers is referred to as a time value. The details of the operation of the monitoring unit 18 will be described later. 1
Reference numeral 9 denotes a storage device in which writing and reading control by the monitoring unit 18 and writing control by the control unit 17 are performed. Storage area. The “identification number” is a number for identifying the service request data Dh1, Dh2, Dh3 that has arrived at the control unit 17. The "identification number" is, for example, "1" for the service request data Dh1, "2" for the service request data Dh2, and "3" for the service request data Dh3.

The "maximum delay time elapsed flag" is
This flag is set when the timer value after the service request data arrives at the control unit 17 exceeds a maximum delay time Δt described later. Here, the maximum delay time Δ
The time exceeding t is referred to as a standby time Δt1 (> Δt). Therefore, in the following description, the “maximum delay time elapsed flag” is set when the timer value exceeds the standby time Δt1.

Here, the maximum delay time Δt is defined as FIG.
Each service request when n different client machines (for example, client machine 121, client machine 122, client machine 123) on the Internet 10 shown in (1) make a service request to the same server machine 14 via the Internet 10. Means the maximum transmission time among the transmission times required for the transmission.

More specifically, it is assumed that the number of client machines connected to the Internet 10 is three, that is, client machines 121, 122 and 123, and that the client machines 121, 122 and 123 at absolute times t1, t2 and t3. It is assumed that service request data Dh1, Dh2, and Dh3 have been transmitted from 122 and 123 to the server machine 14 via the Internet 10.

And now, the service request data Dh
It is assumed that 1, Dh2 and Dh3 arrive at the server machine 14 at times t4, t5 and t6. At this time, the transmission times Δt1, Δt2, and Δt3 required for transmitting the service request data Dh1, Dh2, and Dh3 are calculated by the following equations (1) to (3).
Each is represented by an expression. Δt1 = t4−t1 (1) Δt2 = t5−t2 (2) Δt3 = t6−t3 (3) Here, the maximum delay time Δt is represented by Δt1, Δt2 and Δt3 expressed by the above equations (1) to (3). And is the maximum time, and is expressed by the following equation (4). Δt = Max (Δt1, Δt2, Δt3) (4) The above equation (4) is based on the expression on the right side (Max (Δt1, Δt2, Δt)
3)), the largest one of Δt1, Δt2, and Δt3 is the left side (Δt).

The maximum delay time Δt is determined by a protocol (IP (Internet Protocol) used in the Internet 10.
l)) and the protocol (ARP (Address Resolution Pro
tocol)). Therefore, in the following description, it is assumed that the maximum delay time Δt is known. The “head flag” shown in FIG. 2 is a flag that is set when the service request data is stored at the head address (address 0) of the storage device 16.

Next, the operation of the network system according to the above-described embodiment will be described with reference to FIG. 3, FIG. 4, and FIG. FIG. 3 is a flowchart illustrating the operation of the control unit 17 illustrated in FIG. 2, and FIG. 4 is a flowchart illustrating the operation of the monitoring unit 18 illustrated in FIG.
FIG. 5 is a timing chart illustrating the operation of the network system according to the embodiment.

First, in FIG. 1, the client machines 121 to 123 send time request data Dk1 to Dk3 to the time server 11. Thereby, the time server 11
Sends the time data T1, T2 and T3 indicating the absolute time to the client machines 121 to 123, respectively. Then, the client machines 121 to 123 store the time data T
The time of each timer is adjusted to the absolute time obtained from 1, T2 and T3. As a result, the client machine 12
Since the time synchronization of 1, 122 and 123 is achieved, the time of each timer is the same. Hereinafter, client machine 1
21 to 123 are time request data D at fixed time intervals.
By transmitting k1 to Dk3, time synchronization is periodically performed. Thereby, the accuracy of time synchronization is improved.

Assuming that the service request program 131 is executed by the client machine 121 and the service request data Dh1 is transmitted to the Internet 10 at the absolute time t1 shown in FIG. 5, the service request data Dh1 is, for example, The data is transmitted to the server machine 14 via the Internet 10 at a transmission speed of 1. Here, the service request data Dh1 is stored in the server machine 1
4 and data for an absolute time t1 (timer time) at the time of transmission.

Now, the service request program 132 is executed by the client machine 122, and FIG.
Assuming that the service request data Dh2 is transmitted to the Internet 10 at the absolute time t2 (> t1) shown in FIG.
The service request data Dh2 is, for example, the first
Is transmitted to the server machine 14 via the Internet 10 at a second transmission rate (> first transmission rate) higher than the transmission rate of Here, the service request data Dh2 is
Data for making a service request to the server machine 14 and the absolute time t2 (timer time) when it was sent
Time data.

On the other hand, in the server machine 14 shown in FIG. 2, the control unit 17 proceeds to step SA1 and step SB1 shown in FIG. In step SA1, the control unit 17
Is the service request data D via the Internet 10
It is determined whether or not hi (i = 1, 2, 3,...) has arrived. If the result of this determination is “NO”, the same determination is repeated. In parallel with the processing of step SA1, step S
In B1, the control unit 17 determines whether or not a notification signal Ss described later has been input from the monitoring unit 18. In this case, it is assumed that the notification signal Ss has not been input, and the control unit 17
The above judgment is repeated with the judgment result of step SB1 as "NO". Here, in the control unit 17, a series of processing of steps SA1 to SA4 shown in FIG.
A series of processes 1 to SB4 are executed in parallel. It is also assumed that no data is stored in the storage devices 16 and 19 shown in FIG.

On the other hand, in the server machine 14 shown in FIG. 2, the monitoring unit 18 proceeds to step SC1 shown in FIG.
It is determined whether or not start signal Sk has been input from control unit 17. In this case, it is assumed that the start signal Sk has not been input, and the result of determination in step SC1 is "NO", and the same determination is repeated.

Then, assuming that the service request data Dh2 arrives at the server machine 14 at the absolute time t3 shown in FIG. 5, the control unit 17 sets the determination result of step SA1 (see FIG. 3) to "YES" and returns to step SA2. Proceed to. In step SA2, the control unit 17 first stores the arriving service request data Dh2 and the transmitted data at the absolute time t2 in the address 0 of the storage device 16 shown in FIG. 2, and then proceeds to step SA3. In this case,
Since only the service request data Dh2 and the absolute time t2 are stored in the storage device 16, the control unit 17 performs a process of sorting the storage contents of the storage device 16 in the order of the absolute time (hereinafter referred to as a sort process). Absent.

In step SA3, the control unit 17 outputs to the monitoring unit 18 an activation signal Sk for activating the timer of the monitoring unit 18 and identification number data Dn for identifying the arrived service request data Dh2. Then, the process proceeds to Step SA4. Here, in this case, the identification number data Dn is “2” corresponding to the service request data Dh2.

When the start signal Sk and the identification number data Dn ("2") are input to the monitoring unit 18, the monitoring unit 18 sets the determination result of step SC1 shown in FIG. Proceed to. Step SC
In step 2, the control unit 17 starts counting time using a timer (not shown) corresponding to the identification number “2” (service request data Dh2), and the identification number data Dn (“2”).
Is stored at the address 0 of the storage device 19 shown in FIG. 2, and the process proceeds to Step SC3.

On the other hand, in step SA4 shown in FIG. 3, after recognizing the identification number of the service request data stored at the head address (address 0) of the storage device 16, the control unit 17 then starts the head flag signal Sf. Is output to the storage device 19, and the flow returns to step SA1 to perform the above-described operation.
Here, the head flag signal Sf is a signal indicating that the head flag of the address having only the identification number is set in the storage device 19, but the head flag of the address other than the identification number is not set.

In this case, since the service request data Dh2 is stored at the head address (address 0) of the storage device 16, the head flag signal Sf is stored in the storage device 19 at the address 0 having the identification number "2". Is set (1), while a head flag other than address 0 is not set (0). When the head flag signal Sf is input to the storage device 19, the head flag at the address 0 of the storage device 19 is set (1).

Then, in step SC3 shown in FIG.
The monitoring unit 18 determines whether the maximum delay time elapsed flag is set in the storage device 19. In this case, since the maximum delay time elapsed flag is not set at the address 0 (0), the monitoring unit 18 sets the determination result of step SC3 to "NO" and proceeds to step SC4.

In step SC4, the monitoring unit 18 determines whether or not the timer value of the timer corresponding to the identification number "2" has exceeded the above-mentioned waiting time Δt1 (> maximum delay time Δt: see FIG. 5). Assuming that the current absolute time is equal to or greater than the absolute time t3 and less than the absolute time t4 shown in FIG. 5, the monitoring unit 18 repeats the determination after making the determination result of step SC4 "NO".

Then, assuming that the service request data Dh1 arrives at the server machine 14 at the absolute time t4 shown in FIG. 5, the control unit 17 sets the determination result of step SA1 (see FIG. 3) to "YES" and proceeds to step SA2. Proceed to. In step SA2, the control unit 17 first stores the arriving service request data Dh1 and the transmitted data at the absolute time t1 in the address 1 of the storage device 16 shown in FIG. 2, and then performs a sorting process.

That is, the control unit 17 now stores the storage device 1
6, the service request data Dh2 and Dh1 stored in
The sorting is performed again in ascending order of the transmitted absolute times t2 and t1.
In this case, the absolute time t1 is equal to the absolute time t2 as shown in FIG.
Because it is earlier, the control unit 17
After the storage contents of the address 0 and the storage contents of the address 1 are exchanged, the process proceeds to Step SA3. Thus, the service request data Dh1 and the data of the absolute time t1 are stored at the address 0 of the storage device 16, and the service request data Dh2 and the data of the absolute time t2 are stored at the address 1 of the storage device 16. You.

In step SA3, the control unit 17 starts the activation signal Sk for activating another timer of the monitoring unit 18,
After outputting the identification number data Dn for identifying the arrived service request data Dh1 to the monitoring unit 18, the process proceeds to step SA4. Here, in this case, the identification number data Dn is “1” corresponding to the service request data Dh1.

When the start signal Sk and the identification number data Dn ("1") are input to the monitoring unit 18, the monitoring unit 18 sets the determination result of step SC1 shown in FIG. Proceed to. Step SC
In step 2, the control unit 17 starts counting time using a timer (not shown) corresponding to the identification number "1" (service request data Dh1), and the identification number data Dn ("1").
Is stored at the address 1 of the storage device 19 shown in FIG. 2, and the process proceeds to step SC3.

On the other hand, in step SA4 shown in FIG. 3, since the service request data Dh1 is stored in the head address (address 0) of the storage device 16, the control unit 17 sets the identification number to "1" in the storage device 19. , The head flag of the address 1 is set (1), and the head flag signal Sf indicating that the head flags other than the address 1 are not set (0) is output to the storage device 19. When the head flag signal Sf is input to the storage device 19, the head flag of the address 1 of the storage device 19 is set (1), and the head flag of the address 0 is changed from 1 to 0.

If it is now assumed that the absolute time t6 has elapsed from the absolute time t3 shown in FIG.
The timer value of the timer corresponding to the identification number “2” (service request data Dh2) exceeds the waiting time Δt1. Accordingly, the monitoring unit 18 determines that the determination result of step SC4 shown in FIG. 4 is “YES” and proceeds to step SC5. In step SC5, the monitoring unit 18 sets the maximum delay time elapse flag of the address 0 (identification number "2") in the storage device 19 (1), and then proceeds to step SC6. Step S
In C6, the monitoring unit 18 determines whether or not the head flag of the address 0 (identification number "2") is set.
In this case, since the head flag is set at address 1 (identification number "1") in the storage device 19, the monitoring unit 18
Makes the determination result of step SC6 "NO" and repeats the same determination.

If it is now assumed that the absolute time t7 has elapsed from the absolute time t4 shown in FIG.
The timer value of the timer corresponding to the identification number “1” (service request data Dh1) exceeds the waiting time Δt1. Accordingly, the monitoring unit 18 determines that the determination result of step SC4 shown in FIG. 4 is “YES” and proceeds to step SC5. In step SC5, the monitoring unit 18 sets the maximum delay time elapse flag of the address 1 (identification number "1") in the storage device 19 (1), and then proceeds to step SC6. Step S
In C6, since the head flag of the address 1 (identification number "1") is set, the monitoring unit 18 sets the determination result to "YES" and proceeds to step SC7.

In step SC7, the monitoring unit 18 outputs a notification signal Ss to the control unit 17. The notification signal Ss is
Service request data Dh stored in storage device 16
1, Dh2, which has not been processed yet, has the earliest transmission time, and has a waiting time Δt1 (>
This signal indicates that there is service request data exceeding the maximum delay time Δt).

When the notification signal Ss is input to the control unit 17, the control unit 17 sets the determination result of SB1 shown in FIG. 3 to "YES", and then proceeds to step SB2. In step SB2, the control unit 17 stores the service request data Dhk (in this case, the service request data Dh1) corresponding to the identification number (in this case, the identification number “1”) obtained from the notification signal Ss in the storage device 16. After reading from address 0, the process proceeds to step SB3.

In step SB3, the service processing program 15 is executed on the basis of the service request data Dh1, and the process proceeds to step SB4. In step SB4, the control unit 17 determines that the service request data D
After erasing h1 from the storage device 16, the process returns to step SB1 to repeat the above operation.

As described above, according to the network system of the embodiment described above, the server machine 1
In the service request data Dh1 and the service request data Dh2, the service is executed in the order in which the transmitted absolute time is earlier, thereby eliminating the time inequality between the client machines 121 and 122. Can be.

Here, it will be proved that the above-mentioned temporal unfairness is resolved. In FIG. 5, it is clear from the above description that the service request data Dh1 is processed before the service request data Dh2 under the condition of absolute time t1 <absolute time t2 and absolute time t3> absolute time t4. is there. Accordingly, in the following, it is assumed that the service request data Dh1 is processed earlier than the service request data Dh2 under the condition of absolute time t1 <absolute time t2 and absolute time t4> absolute time t3 shown in FIG. Prove it. In FIG. 5, the relationship between the absolute time t1 and the absolute time t2 and the relationship between the absolute time t3 and the absolute time t4 are expressed by the following equations (5) and (6). t1 <t2 ... (5) t4> t3 ... (6) From the definition of the maximum delay time Δt, the following equation (7) is derived. | (T4−t1) − (t3−t2) | ≦ Δt (7) When the above equation (7) is modified, the following equation (8) is derived. | (T4−t3) + (t2−t1) | ≦ Δt (8) Further, the absolute times t3 and t4 and the maximum delay time Δ shown in FIG.
The relationship between t and the waiting time Δt1 is expressed by the above-described equation (5).
From the expression (8), it is expressed by the following expression (9). | T4-t3 | ≦ Δt <Δt1 (9)

That is, as can be seen from equation (9), the difference between the time at which the service request data Dh1 arrives at the server machine 14 and the time at which the service request data Dh2 arrives at the server machine 14 is equal to or less than the maximum delay time Δt. It is. Further, the service request data Dh2 is the service request data Dh1.
, The service request data Dh2 is stored in the storage device 16 from the time t3 until the standby time Δt1 (> the maximum delay time Δt) elapses. The address order of the data Dh2 and the service request data Dh1 is switched.
Therefore, according to the network system according to the above-described embodiment, temporal unfairness between client machines is resolved.

[0049]

As described above, according to the present invention,
The service request data is processed by the server machine in the order of transmission time, not in the order of arrival time of the service request data. Therefore, the server machine is not affected by the transmission delay time caused by the difference in transmission speed of each service request data. Therefore, according to the present invention, it is possible to obtain an effect that time inequality between client machines is eliminated.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a network system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a server machine 14 shown in FIG.

FIG. 3 is a flowchart illustrating an operation of a control unit 17 shown in FIG.

FIG. 4 is a flowchart illustrating an operation of the monitoring unit 18 shown in FIG.

FIG. 5 is a time chart illustrating an operation of the network system according to the same embodiment.

FIG. 6 is a block diagram showing a configuration of a conventional network system.

[Explanation of symbols]

 10 Internet 11 Time server 12 1 Client machine 12 2 Client machine 12 3 Client machine 14 Server machine 16 Storage 17 Control unit 18 Monitoring unit 19 Storage T1 time data T2 time data T3 time data

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Toru Nagaoka 1-9-1 Konan, Minato-ku, Tokyo NTT Communications Wear Co., Ltd.

Claims (3)

[Claims] 1. A network, a plurality of client machines each having a timer, respectively installed on a plurality of clients and connected to the network, and time synchronization means for synchronizing time of each timer in the plurality of client machines. And a server machine installed on the service provider side and connected to the network, and storage means built in the server machine, wherein each of the client machines is a service for requesting a service from the server machine. Sending time data at the time of sending the service request data obtained from the timer together with the request data to the server machine via the network, wherein the server machine stores the service request data and the time data in the order of arrival; Means for storing the time Network system, wherein a transmission time obtained from the data performs processing based on said service request data to earlier order. 2. The server machine, when one of the service request data and the time data arrives, rearranges the storage order of the plurality of service request data in the order of earlier transmission time obtained from the time data, 2. The network system according to claim 1, wherein the processing is performed in order from the service request data of the head address in the storage unit. 3. The server machine, after processing the service request data after a maximum delay time in the network has elapsed since the service request data was stored in the head address, and after processing the service request data, 3. The network system according to claim 2, wherein data is deleted from said storage means.