Variable communication capacity data transmission device and data transmission device
A technology of data transmission and communication capacity, applied in the direction of digital transmission system, transmission system, data exchange network, etc., can solve the problems of troublesome management and lower transmission efficiency, and achieve the effect of reducing management cost
Inactive Publication Date: 2006-09-13
HITACHI LTD
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Therefore, if the target data frame is lost in the middle of the transmission path, the method described in JP-A No. 9866 / 2002 completely stops the operation of reading the received data frame before the timer expires, which will inevitably lead to a loss of transmission efficiency. reduce
[0011] Furthermore, in any of the above-mentioned link aggregation and the methods of JP-A No.9866 / 2002, it is necessary for an administrator to change the line settings of the transmitting side and the receiving side every time the number of lines is changed, and the management is troublesome
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[0025] It should be understood that the drawings and descriptions of the present invention have been simplified to illustrate components relevant to a clear understanding of the present invention, and at the same time, many other data transmission devices and methods of transmitting data have been deleted for the purpose of clarity of description. part. Those skilled in the art will understand that some other components and / or steps are also desired and / or required in the implementation of the present invention. However, since these components and steps are well known in the art, and since they do not contribute to a better understanding of the present invention, such components and steps are not discussed here. What is disclosed herein is directed to all such changes and modifications of such parts and methods that are known to those skilled in the art.
[0026] FIG. 1 shows an example of a line aggregation type communication system to which the present invention is applied....
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Disclosed is a data transmission device of variable communication capacity that can set bands and set line communication capacities according to users' requests, and can automatically determine usable lines. The data transmission device includes: a transmission device having a transmission unit connected to N (N > 1) transmission lines; a reception device having a reception unit connected to N reception lines; and negotiation units connected to both the transmission unit and the reception unit. The transmission unit converts transmission data of parallel bits into a data array with one to N trains that is different in the number of data trains depending on specified transmission capacity. The reception unit synthesizes reception data trains inputted from one to N reception lines determined by specified reception capacity, of the N reception lines. The negotiation unit of the transmission side sends line use / disuse information to the negotiation unit of the reception side so that both the transmission unit and the reception unit select identical lines.
Description
[0001] priority claim [0002] This application claims priority from Japanese application JP 2005-064751 filed March 9, 2005, the contents of which are hereby incorporated by reference into this application. technical field [0003] The present invention relates to a variable communication capacity data transmission device. More particularly, the present invention relates to a variable communication in which a virtual transmission path is formed through a plurality of transmission lines, and a transmission rate is changed by automatically negotiating the number of transmission lines between a sending end and a receiving end according to a requested bandwidth and a connection status of the transmission lines capacity data transmission equipment. Background technique [0004] Most long-distance transmission networks use serial transmission, and increase the transmission speed by increasing the transmission clock frequency. However, high-speed serial transmission of 40 Gbps o...
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IPC IPC(8): H04L29/06H04L5/00H04L12/56H04L45/24H04L47/41
CPCH04J14/0246H04J14/0227H04J14/0279H04J14/02H04L25/14
Inventor 丰田英弘
Owner HITACHI LTD