Network system, connection apparatus and data emitting method
A data sending method and a technology for connecting devices, which are applied in the directions of network connection, network interconnection, data exchange through path configuration, etc., and can solve problems such as inability to transmit data, failure to consider the importance of data, and power consumption
Inactive Publication Date: 2011-07-27
HITACHI LTD
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In addition, in the communication quality control of Patent Document 1, the importance of data is not considered
Therefore, in the communication quality control of Patent Document 1, when the communication quality level guaranteed as described above is lowered, the communication terminal in the local network may not be able to accurately transmit the data with high importance to the management center.
[0008] In addition, among the communication terminals that are widely used in sensor networks, there are battery-driven communication terminals that do not perform complex processing, but only perform sensing detection and transmission of data. Such communication terminals consume most electricity
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[0049] The method of preventing the loss of important data caused by the overflow of the buffer of the network interconnection device includes the method of adjusting the amount of data sent by the interconnection device of the network and the method of adjusting the amount of data sent by the communication terminal in the local network. way.
[0050] In the method in which the network interconnection device adjusts the amount of data to be transmitted, a communication terminal in a local network adds a header indicating the degree of importance to the data and transmits the data. Furthermore, when a buffer overflow occurs in the network interconnection device, the network interconnection device sequentially discards data with a low importance, thereby preventing data with a high importance from being lost. On the other hand, the communication terminal can prevent buffer overflow in the network interconnection device by adjusting the amount of transmission data and not adding ...
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The present invention provides a network system, a connection apparatus and a data emitting method with the object to reduce electricity consumption in communications. The network system includes one or more terminals which transmit acquired data to a first network, a network interconnection device which is connected to the terminal via the first network and which receives the data from the terminal, and a management server which is connected to the network interconnection device via a second network and which receives the data from the network interconnection device; the terminal transmits the same data to the network interconnection device via the first network by a frequency corresponding to redundancy; the data contains the priority according to the contents of the data; and the network interconnection device acquires the communication quality of the second network and instructs the terminal to transmit the data according to redundancy determined based upon the acquired communication quality and the priority.
Description
technical field [0001] The present invention relates to a communication terminal and a network interconnection device for performing QoS control on data communication via a plurality of communication networks. Background technique [0002] In recent years, operations such as monitoring and maintenance of equipment in electric power plants or industrial plants, monitoring of energy consumption, and the like have been performed remotely and automatically by using sensor networks. In addition, the management system that analyzes the data collected by the sensor network has been placed on the local network connected to the monitoring target of the sensor network in most cases in the past, but in recent years, due to the As the number of terminals increases and the amount of information collected by each communication terminal increases, information is not completely stored in one local network but is divided and stored in a plurality of local networks (partitioned). In addition...
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IPC IPC(8): H04L29/06H04L12/56H04L12/66H04L12/46H04L47/2491H04L47/80H04M3/00H04W28/10H04W88/16
CPCH04L1/0025H04L47/25H04L1/1822H04L1/0003H04L1/0009H04L47/10H04L1/1829H04L1/1812H04L12/2825H04L47/2491
Inventor 柚木祥慈高田芽衣小高俊之宫崎祐行山田勉
Owner HITACHI LTD