JP2007251777A - Ip communication method and ip communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an IP communication method which can perform a flow quantity control only. <P>SOLUTION: The IP communication method to conduct a digital communication by an IP protocol from a transmission source apparatus to a transmission destination apparatus through a repeating device is provided with a flow quantity noticing step to notice by turns the flow quantity requested from the transmission source apparatus to a followed step repeating device, a flow quantity reducing step to reduce the flow quantity as a common communication flow quantity in the case that an individual capable flow quantity of the noticed repeating device is lack of the requested flow quantity, and a common communication flow quantity noticing step to notice the common communication flow quantity noticed to the transmission destination apparatus by the flow quantity reducing step to the transmission source apparatus. The transmission source apparatus communicates with the transmission destination apparatus according to the common communication flow quantity. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method and system for performing information communication using IP (Internet Protocol).

As is well known, there are only two methods for IP communication: TCP (Transmission Control Protocol) that performs retransmission control and flow rate adjustment at the same time, and UDP (User Datagram Protocol) that does not perform retransmission control and flow rate adjustment (for example, patents) Reference 1). Therefore, even when only flow rate adjustment is desired without performing retransmission control, TCP must be performed, and in this case, retransmission control must also be performed. Accordingly, there is an adverse effect such as network traffic being affected by retransmission control, and some measures are desired.
JP 2001-136202 A

As described above, since the existing technology cannot realize IP communication that enables only traffic flow control, provision of some new technique is awaited.
The present invention has been made in view of the above circumstances, and an object thereof is to provide an IP communication method and an IP communication system capable of performing only flow rate control.

  In order to achieve the above object, according to one aspect of the present invention, there is provided an IP communication method for performing digital communication from a transmission source device to a transmission destination device via a relay device using an IP (Internet Protocol) protocol, the transmission source A flow rate notification step for sequentially notifying the flow rate required by the device to the next-stage relay device, and if the notified individually possible flow rate of the relay device is insufficient for the required flow rate, the flow rate is reduced as a common communication flow rate. A flow rate reduction step, and a common communication flow rate notification step of notifying the transmission source device of the common communication flow rate notified to the transmission destination device by the flow rate reduction step. An IP communication method is provided in which communication is performed with the destination device according to the above.

  According to the present invention, it is possible to provide an IP communication method and an IP communication system capable of performing only flow rate control.

  FIG. 1 is a schematic diagram showing an embodiment of an IP communication system according to the present invention. This system includes a transmission source terminal device 11 that generates predetermined information to be transmitted, a relay device 1, a relay device 2, a relay device 3, and a relay device 3 that sequentially receive and transmit information from the transmission source terminal device. And a transmission destination terminal device 12 that receives predetermined information. That is, a plurality of relay devices 1 to 3 are interposed in the communication path from the transmission source terminal device 11 to the transmission destination terminal device 12. In this embodiment, the relay devices 1 to 3 are sequentially relayed to transmit communication traffic to the destination terminal device 12 while adjusting the flow rate.

  FIG. 2 is a flowchart showing an operation procedure of the transmission source terminal device 11 in the IP communication system of FIG. In FIG. 2, the transmission source terminal device 11 checks whether or not a band has been confirmed with the relay device 1 (step S201). If the bandwidth has not been confirmed within a certain period of time recently, the transmission source terminal device 11 performs bandwidth confirmation with the relay device 1 (step S202).

  Next, the transmission source terminal device 11 detects whether or not the bandwidth to the relay device 1 adjacent to the requested bandwidth is sufficient (step S203). If the bandwidth is insufficient, the requested bandwidth is lowered below the bandwidth to the relay device 1 (step S204). If the requested bandwidth is sufficient for the bandwidth to the relay device in step S203, the requested bandwidth is notified as it is to the relay device 1 without reducing the requested bandwidth (step S205). The requested bandwidth notified from the request source terminal device 11 is received by the relay device 1 (step S206). Thereafter, the operation of the relay device 1 is started. Next, the operation of the relay device 1 will be described.

  FIG. 3 is a flowchart showing an operation procedure of the relay apparatus 1 in the IP communication system of FIG. After receiving the requested bandwidth from the transmission source terminal device 11 in step S301 in FIG. 3, the relay device 1 detects whether the bandwidth to the adjacent relay device 2 is sufficient with respect to the requested bandwidth (step S302). ). If the bandwidth is insufficient, the relay device 1 lowers the requested bandwidth to be equal to or less than the bandwidth to the relay device 1 (step S303). If the requested bandwidth is sufficient for the bandwidth to the relay device 2 in step S302, the relay device 1 notifies the relay device 2 as it is without reducing the requested bandwidth (step S304). Thereafter, similarly, the processing is performed by the relay device 2 and the relay device 3, and finally the requested bandwidth is transmitted to the transmission destination terminal device 12, and the processing is performed by the transmission destination terminal device 12.

  FIG. 4 is a flowchart showing an operation procedure of the destination terminal apparatus 12 in the IP communication system of FIG. After receiving the requested bandwidth from the relay device 3 in step S401 of FIG. 4, the destination terminal device 12 determines whether the processing capability is sufficient for the requested bandwidth (step S402). If the bandwidth is insufficient, the transmission destination terminal device 12 lowers the requested bandwidth to be equal to or lower than the bandwidth to the relay device 1 to make a communicable bandwidth (step S403).

  If the requested bandwidth is sufficient for the processing capability in step S402, the destination terminal apparatus 12 notifies the relay device 3 as the communicable bandwidth as it is without reducing the requested bandwidth (step S404). As a result, the final communicable bandwidth is determined. Thereafter, the communicable band is sequentially transmitted to the relay device 3, the relay device 2, and the relay device 1. For example, the relay device 1 receives the communicable band from the relay device 2 in step S305 in FIG. 3, and sends it to the transmission source terminal in step S306. Similarly, the transmission source terminal device 11 receives the communicable band in S206 of FIG. By such a procedure, the transmission source terminal device 11 can grasp the minimum possible communication amount on the route to the transmission destination terminal device 12, and adjusts the traffic flow based on the possible communication amount. Can be sent.

  As described above, according to this embodiment, it is confirmed whether the bandwidth required as the traffic can be actually received by the next relay device, and if not enough, the bandwidth is adjusted by narrowing the bandwidth. It becomes possible. In this case, there is an effect that an IP communication method capable of performing only flow rate control without performing retransmission control is obtained. Therefore, according to this embodiment, it is possible to provide an IP communication control method and an IP communication system that can adjust only the traffic flow rate.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.

1 is a schematic diagram showing an embodiment of an IP communication system according to the present invention. The flowchart which shows the operation | movement procedure of the transmission source terminal device 11 in the IP communication system of FIG. The flowchart which shows the operation | movement procedure of the relay apparatus 1 in the IP communication system of FIG. The flowchart which shows the operation | movement procedure of the transmission destination terminal device 12 in the IP communication system of FIG.

Explanation of symbols

  1-3 ... Relay device, 11 ... Transmission source terminal device, 12 ... Transmission destination terminal device

Claims (2)

An IP communication method for performing digital communication from a transmission source device to a transmission destination device via a relay device using an IP (Internet Protocol) protocol,
A flow rate notification step of sequentially notifying the next-stage relay device of the flow rate requested from the transmission source device;
A flow rate reduction step of reducing the flow rate as a common communication flow rate when the individually possible flow rate of the notified relay device is less than the required flow rate;
A common communication flow rate notification step of notifying the transmission source device of the common communication flow rate notified to the transmission destination device by the flow rate reduction step,
The IP communication method, wherein the transmission source device communicates with the transmission destination device according to the common communication flow rate. An IP communication system that performs digital communication from a transmission source device to a transmission destination device via a relay device using an IP (Internet Protocol) protocol,
A flow rate notification means for sequentially reporting the flow rate required from the transmission source device to the next-stage relay device;
A flow rate reducing means for reducing the flow rate as a common communication flow rate when the individual possible flow rate of the notified relay device is less than the required flow rate;
A common communication flow rate notifying unit for notifying the transmission source device of the common communication flow rate notified to the transmission destination device by the flow rate reducing unit;
The IP communication system, wherein the transmission source device communicates with the transmission destination device according to the common communication flow rate.

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