Data distribution management device and data distribution management method

Abstract

A data distribution management device (10) is provided on a transmission route between a transmission device (C1) that requires a delivery acknowledgement corresponding to data transmitted and a receiving device (C2) in which a transmission delay in a circuit (2) is smaller than a transmission delay in a circuit (3), and comprises a transfer unit that transfers the data from the transmission device (C1) to the receiving device (C2), a returning unit that prepares a delivery acknowledgement corresponding to the data transferred and send the delivery acknowledgement to the transmission device. The data distribution management device (10) also comprises a SG distribution control section (16) that decides whether the data transmitted by the transmission device (C1) is a protocol dependent on transmission delays and that orchestrates the returning unit to prepare a delivery acknowledgement and send the delivery acknowledgement when it is decided that the data is the delay dependent protocol.

Description

[0001]This application is a Divisional of co-pending application Ser. No. 10 / 169,992 filed on Jul. 12, 2002, and for which priority is claimed under 35 U.S.C. § 120. Application Ser. No. 10 / 169,992 is the national phase of PCT International Application No. PCT / PCT / JP01 / 09893 filed on Nov. 13, 2001 under 35 U.S.C. §371. The entire contents of each of the above-identified applications are hereby incorporated by reference. This application also claims priority of Application No. 2001-347290 filed in Japan on Nov. 6, 2001 under 35 U.S.C. §119; and this application claims priority of Application No. 2000-347290 filed in Japan on Nov. 14, 2000 under 35 U.S.C. § 119.TECHNICAL FIELD[0002]The present invention relates to a data distribution management device which is provided on a transmission route between a transmission device that requires a delivery acknowledgement to data transmitted and a receiving device that constitutes the other party in bilateral communication with the transmission...

AI Technical Summary

Benefits of technology

[0017]According to this invention, the decision unit decides whether the destination of the data transferred from the first terminal device passes through an error-prone circuit. The management control unit orchestrates the returning unit to send a delivery acknowledgement when the decision unit decides that the destination passes through an error-prone circuit, and it is thereby prevent throughput from deteriorating due to errors.

[0029]According to this invention, the information obtaining unit obtains information related to the communication between the first and the second terminal devices from the header-information pertaining to the arbitrary data received from the first and the second terminal devices, the information retaining unit retains the communication-related information obtained by the information obtaining unit, and the decision unit, the communication start decision unit and the communication ending decision unit or the reception decision unit each make decisions based on the above-mentioned communications-related information to thereby orchestrate the returning unit to send the delivery acknowledgement, the return processing being not orchestrated, however, in the case involving a protocol where the use of temporary delivery acknowledgement renders the protocol less efficient.

[0073]According to this invention, when the delay in transmission with the first terminal device is smaller than the delay in transmission with the second terminal device, it is devised such that the contradiction involving communications between transmission and reception is resolved and the data distribution from the first terminal device to the second is made at a high speed and accurately.

[0077]According to this invention, at the decision step, it is decided whether the destination of the data transferred from the first terminal device passes through an error-prone circuit, and at the management control step, when it is decided at the decision step that the destination passes through the error-prone circuit, the returning unit is orchestrated to prepare the delivery acknowledgement and send the delivery acknowledgement to the first terminal device, and thereby preventing the throughput from falling off due to errors.

Problems solved by technology

Under the conventional data distribution management system, however, the existence of the data segments whose protocols are not influenced by transmission delays is not considered, nor is the existence of the data segments of which the protocols deteriorate in transmission efficiency once a temporary delivery acknowledgement is used.

This plus the conventional practice of sending a temporary delivery acknowledgement to the transmission device C11 with respect to all data segments, has increased the processing load on both the transmission gateway 100 and the transmission device C11, and conversely, often deteriorates their speed performance to a problematic extent.

Furthermore, in conventional practices, temporary delivery acknowledgement is sent to the transmission device C11 with respect to all data segments, and therefore even when erroneous data segments are received from the transmission device C11 as are those data segments which are interpreted as data segments of other than BGP or windows type, a temporary delivery acknowledgement is invariably sent to the transmission device C11 to often result in contradictions arising in communication, in which case the processing load on the transmission gateway 100 and on the transmission device C11 increases so much so that the problem of deteriorated speed performance crops up.

Therefore, when data is transmitted in so-called piggyback fashion in which delivery acknowledgements transmitted from the receiving device C12 are included in the data segments transmitted from the receiving device C12 to the transmission device C11, there emerges a problem such that the data segments from the receiving device C12 to the transmission device C11 do not reach the transmission device C11.

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