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Data communication method and data communication apparatus

A data transmission method and data technology, applied in wireless communication, image communication, network data management, etc., can solve the problems of application 1401 transmission rate reduction, weakening of real-time characteristics, etc.

Inactive Publication Date: 2006-12-20
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in a reduction in application 1401 transfer rate, which in turn impairs real-time performance

Method used

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  • Data communication method and data communication apparatus
  • Data communication method and data communication apparatus
  • Data communication method and data communication apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0068] figure 1 is a block diagram showing the structure of the data communication system according to the first embodiment of the present invention. refer to figure 1 , the communication applications 1401 to 1403 assign priorities to their respective data messages DM, and send the data messages DM to an SDIO Bluetooth host 101 (hereinafter, simply referred to as the host). Then, the host 101 judges the priority of the received data message DM in the priority judging part 102, and sends the data message to the SDIO bluetooth card 1406 (hereinafter referred to as the card for short) in descending order of priority. Here, it is assumed that the data message DM1, the data message DM2 and the data message DM3 are in descending order of priority.

[0069] figure 2 is a diagram showing a sequence of data messages in the data communication system according to the present embodiment. As shown in the drawing, the host 101 receives data message DM3, data message DM2, and data mes...

no. 2 example

[0073] A data communication system according to a second embodiment of the present invention will now be described.

[0074] In the data communication system according to the first embodiment described above, once the host computer 101 starts sending the data message DM2 via the SD bus 1405, the data message DM1 received while the data message DM2 is being sent cannot be sent until the data message DM2 is completed. DM2 sending. refer to Figure 4 For example, even if the data message DM1 has a higher priority than the data message DM2, when the host 101 receives the data message DM1, the sending of the data message DM2 has already started, and the host 101 cannot send the data message DM1 first. In particular, when the data size of the data message DM2 is large, the SD bus 1405 is occupied for a long time, which causes a problem in the transmission rate of the communication application 1401 .

[0075] Figure 5 is a block diagram showing the configuration of a data communi...

no. 4 example

[0089] Figure 11 is a block diagram showing the configuration of a data communication system according to a fourth embodiment of the present invention. The data communication system according to the third embodiment described above solves a transfer rate problem which occurs when there are a plurality of communication applications having the same priority. However, since there is only one transmission path, it is difficult to completely prevent a decrease in the transmission rate.

[0090] Therefore, the data communication system according to the present embodiment is configured to perform communication without reducing the transfer rate even when there are a plurality of communication applications having the same priority. In other words, in the case where communication between the card 1406 and the host 1101 is performed in the 4-bit mode, the communication application can use two of the four of the 4-bit mode data buses for virtual exclusive use. It should be noted, howe...

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Abstract

Provided is a data communication apparatus capable of launching communication applications without impairing the real-time characteristic of a communication application having a high real-time characteristic in a case where plural communication applications including a communication application having a high real-time characteristic are present and to be launched at the same time. Priorities are assigned to data messages DM1 through DM3 to be transmitted from communication applications (1401) through (1403), respectively, and the assigned priorities are judged upon receipt of the data messages DM1 through DM3 transmitted from the communication applications (1401 through 1403), respectively, so that the data messages are transmitted to a card (1406) in order of decreasing priorities. In this manner, priorities are assigned to the data transmitted from the respective communication applications (1401 through 1403), and data from the communication applications (1401 through 1403) is transmitted in order of decreasing priorities.

Description

technical field [0001] The present invention relates to a data communication method and a data communication device. Background technique [0002] In recent years, digitization of content has brought various benefits, such as the realization of high-quality music and video, and the sharing of information via the Internet. On the other hand, however, issues such as tampering and unauthorized use of data have arisen, which have now become a matter of public concern. [0003] In order to solve these problems, the SDIO standard has been established, in which the technology used in the SD (Secret Digital) memory card, which has a very well-established copyright including two-way authentication technology, is extended to the interface. Protective function. A data communication system extended to Bluetooth, a promising wireless communication technology, has been known as one of the systems conforming to these standards. [0004] Figure 17 is a block diagram showing the structur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/24H04N1/41H04L12/24H04B5/00H04L29/06H04L12/40
CPCH04L12/40H04L12/40013H04L12/4013H04L12/40163H04L47/10H04L47/14H04L47/2433H04L47/2458H04L2012/5651H04L2012/5652H04W28/02H04L47/43H04W8/04
Inventor 山内进一郎松田智秀
Owner PANASONIC CORP
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