JP2010026854A - Time-synchronized information distribution and reception method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent information from being received by terminals in different areas at different times due to communication time delay. <P>SOLUTION: Time data from a host computer 11 is transmitted from a first device 12 having a first communication delay time means to second devices 16<SB>1</SB>, 16<SB>2</SB>, 16<SB>3</SB>(hereinafter referred to as 16) having a second communication delay time means through a LAN line 13 or the Internet 14, and thereafter supplied to the terminals 15<SB>1</SB>, 15<SB>2</SB>, 15<SB>3</SB>(hereinafter referred to as 15) in different local regions. Time data is transmitted and received between the first device 12 and the second devices 16. The first device 12 determines the longest one of the communication delay times of the connected second devices 16. The time data received on the basis of the delay time is transmitted to the host 11. The first device 12 adds time data to be transmitted to the terminals 15 by the second devices 16 to a frame determined to need delay processing with the time data received from the host 11, and transmits the data toward the terminals 15. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for simultaneously distributing and receiving information from a terminal side and information to a terminal side.

FIG. 4 is a system configuration diagram normally used in auction such as an Internet auction. In this figure, 31 is a host computer, 32 ₁ , 32 ₂ , and 32 ₃ are terminals, and the host computer 31 and the terminals 32 ₁ , 32 ₁ , 32 ₂ is connected to an Ethernet (registered trademark) LAN line 33 which is a communication path, and the terminal 32 ₃ is connected via an Internet network 34 which is a communication path.

In the system configuration as described above, information is transmitted from the host computer 31 to each of the terminals 32 _{1 to} 32 ₃ via a communication path composed of the LAN line 33, the Internet network 34, and the like. However, although the information from the host computer 31 arrives at the terminals 32 ₁ and 32 ₂ early, the information is sent to the terminal 32 ₃ via the Internet network 34, so that the information is delayed.

For this reason, in order to correct the transmission delay of information through the communication path, there is one that adopts a means that considers the delay time (see Patent Document 1).
JP 2005-354351 A

  In the system configuration diagram shown in FIG. 4, when certain information is uploaded to the host computer 31, it is necessary to output the conclusion information within a certain time, but depending on the communication path due to the regional difference from the host computer to the terminal, If there is no grace time before the information is received at the terminal, inequality occurs at the information arrival time. Therefore, in order to avoid this inequality, it is necessary to provide a grace period as described above, and as a result, it is necessary to limit the amount of information that can be uploaded by the host computer.

  The object of the present invention is made in view of the above circumstances, and since all terminals can receive information distributed from the host computer at the same time, information acquisition in regional differences of terminals due to communication time delay An object of the present invention is to provide a time-synchronized information distribution / reception method that prevents inequality in time.

In order to achieve the above object, the invention according to claim 1 provides a first device having first communication delay time means between a host computer and a communication path, and between the communication path and a plurality of terminals. The first communication delay time is provided with a second device having second communication delay time means having different communication delay times, and information of the host computer is transmitted from the first device via the communication device to the plurality of devices via the second device. An information distribution / reception method for distributing to a terminal and receiving the information at the terminal,
A first process for adjusting the time of the first apparatus and the second apparatus; a second process of transmitting and receiving data between the first apparatus and the second apparatus when the time adjustment of the first apparatus and the second apparatus is completed; And a third step of selecting a frame which is data to be delayed when data is transmitted / received between apparatuses.

  According to a second aspect of the present invention, in the first aspect, in the first step of performing the time adjustment, the time of the first device is transmitted to the second device, and the second device receives the transmitted time. The first step of transmitting the time held by the second device to the first device, and the first device calculates the current time of the first device from the time transmitted from the second device, A second step for determining the communication delay time between the first device and the second device; the first device transmits the communication delay time to each second device; and the second device sets the time received from the first device. A third step of calculating a time of the second device and a communication delay time between the first device and transmitting to the first device, and a fourth step of calculating the processing of the third step by the first device, Repeat the process of the 3rd step and the 4th step, and the value is a constant value Characterized in that the process ends when it becomes lower.

  According to a third aspect of the present invention, in the first aspect, the second process of transmitting and receiving the data includes a step of determining a delay time corresponding to the second device having the longest communication delay time in the first device, A device that receives data from a host computer and that is required for delay processing, adds a time at which the second device transmits to the terminal, and transmits the data to each terminal; Transmitting the data for the terminal sent from the terminal to the terminal at the time when the first device has added, the second device transmits the received data from the terminal to the first device, and the first device from the second device And a step of waiting for the determined host computer delay time to transmit the received data to the host computer.

  According to the present invention, since all terminals can receive the information distributed from the host computer at the same time, inequality does not occur in the information acquisition time in the regional difference of the terminals due to the communication time delay. Can be.

  In addition, the delay means installed on the host computer side and the delay means installed on the terminal side can be made different delay means, respectively, so that data can be stocked immediately before the required information. it can.

  Further, since all the delay means recognize the same time, the entire system can be synchronized with the time of the delay means on the host computer side.

  In addition, by selecting information to be delayed, the information is delayed, but the response can be made without delay, and therefore unnecessary performance degradation can be avoided.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram showing an embodiment of the present invention. Reference numeral 11 denotes a host computer. Data from the host computer 11 is transmitted from a first apparatus 12 having a first communication delay time means to a LAN line 13 or an Internet network. 14, the first communication delay time means of the first device 12 is transmitted to the second devices 16 ₁ , 16 ₂ , 16 ₃ having the second communication delay time means having different delay times, Different terminals 15 ₁ , 15 ₂ , 15 ₃ are supplied.

FIG. 2 is a block diagram showing a specific configuration of the first device 12, and FIG. 3 shows second devices 16 ₁ , 16 ₂ , and 16 ₃ , both devices having substantially the same configuration. The different part is that the time tables provided in the first device 12 are provided by the number of the second devices (three devices in the figure).

2 and 3, reference numeral 21 denotes an internal bus. The internal bus 21 includes a CPU 22, a memory (ROM, RAM, etc.) 23, a timer (1 ms) 24, a first communication (LAN) card 25, a second communication ( LAN) card 26 and time tables 27 ₁ , 27 ₂ , 27 ₃ are connected. In addition, the time table in FIG.

  In the block diagram of the first device 12 shown in FIG. 2, the first communication card 25 is connected to the host computer 11, and the second communication card 26 is connected to the LAN line 13 and the Internet network 14.

In the block configuration diagram of the second devices 16 ₁ , 16 ₂ , 16 ₃ shown in FIG. ₃ , the first communication card 25 is connected to the terminals 15 ₁ , 15 ₂ , 15 ₃ , and the second communication card 26 is a LAN line. 13 or the Internet network 14 respectively.

2 and 3 configured as described above, the CPU 22 manages information in the time tables 27 and 27 _{1 to} 27 _{3 to} which a timer value in units of 1 ms is added when data is transmitted and received. When the first device 12 transmits data to the second devices 16 ₁ , 16 ₂ , 16 ₃ , the timer value at the time of transmission is stored in the time table, and the data from the second devices 16 ₁ , 16 ₂ , 16 _{3 is} stored. The timer value at the time of reception is stored in the time tables 27, 27 _{1 to} 27 ₃ . 1/2 of this difference is taken as the delay time.

The timer 24 is a 1 ms timer. The transmission delay time is arranged on the memory 23. When transmission delay is necessary, data is set in the transmission delay time tables 27, 27 _{1 to} 27 ₃ on the memory 23. To do. The counters set in the transmission delay time tables 27 and 27 _{1 to} 27 ₃ are decremented by the interrupt process every 1 ms of the timer 24, and the data transmission process is performed when the counters become “0”.

Next, the processing of the first device 12 and the second devices 16 ₁ , 16 ₂ , 16 ₃ in the above embodiment will be described with reference to FIGS.

First, in Step 1, the time of the first device 12 and the second devices 16 ₁ , 16 ₂ , 16 ₃ is adjusted.
(B) First, the time data is first apparatus 12 having the time table 27 _{1-27 3} of each of the second devices 16 _1, 16 _2, 16 ₃ first device 12 for the second device 16 _1, 16 ₂ and 16 ₃ are transmitted. On the other hand, the second devices 16 ₁ , 16 ₂ , 16 ₃ receive the transmitted time data and set it to the time in the time table 27, and the times that the second devices 16 ₁ , 16 ₂ , 16 ₃ have. The time data in the table 27 is transmitted to the first device 12.
(B) Thereafter, the first device 12, the second device 16 _1, 16 _2, the time data from the 16 ₃ sets the time table 27 _{1-27 3} times, the first device 12, the time table 27 ₁ of ~ 27 ₃ [((time sent from the second device 16 _1, 16 _2, 16 ₃₎ - (time of the current of the first apparatus 12)) / 2] where a calculation, the results first The communication delay time of the first device 12 and each of the second devices 16 ₁ , 16 ₂ , 16 ₃ is determined and set in the time tables 27 _{1 to} 27 ₃ .
(C) In the same manner, the first device 12 performs the following (the time of the first device 12 + each second device 16 ₁ , 16 ₂ , 16 _{3) with} respect to each second device 16 ₁ , 16 ₂ , 16 _3. a communication delay time) between the transmitted to the second device 16 _1, 16 _2, 16 _3, the second device 16 _1, 16 _2, 16 _3, the time received from the first unit 12 (first unit 12 Time + communication delay time with each of the second devices 16 ₁ , 16 ₂ , 16 ₃ ) is set in the time table 27, and (time of each second device 16 ₁ , 16 ₂ , 16 ₃ + first device 12 Communication delay time) to the first device 12.
(D) The first device 12 [[(delay time of communication with each second device 16 ₁ , 16 ₂ , 16 ₃ )] − ((time transmitted from each second device 16 ₁ , 16 ₂ , 16 ₃₎ ) − (Own time)) / 2] (communication delay time with each new second device 16 ₁ , 16 ₂ , 16 ₃ ), the process of (c) is performed.
(E) When (c) and (d) above are repeated, and [(time transmitted from each second device 16 ₁ , 16 ₂ , 16 ₃ ) − (own time)] becomes a predetermined value or less. End the process.

Next, in step 2, time data is transmitted and received between the first device 12 and the second devices 16 ₁ , 16 ₂ , 16 ₃ .
(F) The first device 12 has the longest communication delay time from the communication delay time of each of the connected second devices 16 ₁ , 16 ₂ , 16 ₃ , for example, equivalent to the second device 16 ₃ . The delay time corresponding to each second device 16 ₁ , 16 ₂ , 16 ₃ is determined. This delay time is a communication delay time of the host computer 11 and is used when the time data received from each of the second devices 16 ₁ , 16 ₂ , 16 ₃ is transmitted to the host computer 11.
(G) The first device 12 uses the time data received from the host computer 11 and the second devices 16 ₁ , 16 ₂ , and 16 ₃ are connected to the terminals 15 ₁ , 15 ₂ , and 15 for frames that are determined to require delay processing. _The time data to be transmitted is added to ₃ and transmitted to the terminals 15 ₁ , 15 ₂ , and 15 ₃ .
(H) Each of the second devices 16 ₁ , 16 ₂ , 16 ₃ uses the time data for the terminal sent from the first device 12 as the terminal 15 ₁ , 15 ₂ , 15 ₃ is transmitted.
(I) The second devices 16 ₁ , 16 ₂ , 16 ₃ transmit the time data received from the terminals 15 ₁ , 15 ₂ , 15 ₃ to the first device 12. The first device 12 transmits the time data received from the second devices 16 ₁ , 16 ₂ , 16 ₃ to the host computer 11 after waiting for the delay time of the host computer 11 determined in (F) above.

  In the next step 3, time data to be delayed is selected. The time data to be delayed is a TCP / IP frame, which is selected under the following conditions, excluding response frames on the protocol.

1. Source IP address 2. Source port number 3. Destination IP address 4. Destination port number Protocol type

1 is a system configuration diagram showing an embodiment of the present invention. The block block diagram which shows the specific structure of a 1st apparatus. The block block diagram which shows the specific structure of a 2nd apparatus. The conventional system block diagram.

Explanation of symbols

11 ... host computer 12 ... first device 13 ... LAN line 14 ... Internet network 15 _1, 15 _2, 15 ₃ ... terminal 16 _1, 16 _2, 16 ₃ ... second device

Claims (3)

A first communication device having a first communication delay time means is provided between the host computer and the communication path, and the second communication is different from the first communication delay time between the communication path and the plurality of terminals. An information distribution / reception method in which a second device having a delay time means is provided, information of a host computer is distributed from a first device to a plurality of terminals via a communication path via a second device, and the information is received by the terminals. Because
A first process for setting the time of the first device and the second device;
A second process of transmitting and receiving data between the first device and the second device when the time adjustment of the first device and the second device is completed;
A time-synchronous information distribution / reception method comprising a third step of selecting a frame which is data to be delayed when data is transmitted / received between the first device and the second device. The first step of adjusting the time is as follows:
A first step of transmitting the time possessed by the first device to the second device, the second device receiving and setting the transmitted time, and transmitting the time possessed by the second device to the first device;
A second step in which the first device calculates the current time of the first device from the time transmitted from the second device and determines the communication delay time between the first device and the second device;
The first device transmits the communication delay time to each second device, the second device sets the time received from the first device, and calculates the communication delay time between the second device and the first device. A third step of transmitting to the first device,
A fourth step in which the first device calculates the process of the third step,
2. The time-synchronized information delivery / reception method according to claim 1, wherein the processes of the third step and the fourth step are repeatedly calculated, and the process is terminated when the value becomes a predetermined value or less. The second process of transmitting / receiving the data includes:
The first device determines a delay time corresponding to the second device having the longest communication delay time;
The first device is data received from the host computer, and the data required for delay processing is added to the time when the second device transmits to the terminal, and transmitted to each terminal;
The second device transmits the data for the terminal sent from the first device to the terminal at the time when the first device has added,
The second device transmits received data from the terminal to the first device, and the first device waits for the determined host computer delay time for the data received from the second device, and transmits the data to the host computer. The time synchronization type information delivery / reception method according to claim 1, wherein:

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