JP2001022656A - Mail device and mail transmission and reception system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the contents size of a body part which can be sent and received from decreasing by composing information on a body part of only a contents body to originally be sent and receive even if the mail is multi-part mail or divided mail and providing information showing the constitution of the contents body of the body part for the header part. SOLUTION: Even a multi-part or divided mail has only a contents body to originally be sent and received as information on the body part and also has information showing the constitution of the contents body of the body part at the header part. This device demarcates the header part and body part as the contents body in mail data by a mail data analyzing means 12. The mail data analyzing means 12 includes a header processing part 14 which analyzes the header part and a contents processing part 15 which decodes encoded body part data. The header processing part 14 includes a body constitution analysis part which analyzes how the body part is constituted in addition to header information analysis.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for transmitting and receiving mail data and a system thereof.

[0002]

2. Description of the Related Art In recent years, mail has become popular. Mail transmission / reception is being generally performed not only between personal computers on the Internet but also on portable devices such as mobile phones.
In a conventional mail device that is widely used on the Internet, MIME (Multipurpopo) is used to transmit and receive attached files and to transmit and receive large data as divided mail.
seInternet Mail Extensions).

[0003] A description will be given of a case where a mail using the MIME is attached to the text data shown in FIG. 9 and image (GIF) data is attached to the mail.

[0004] Mail data using this MIME is composed of a header part and a body part. According to the content type information (“Content-Type”) of the header part, the body part is composed of a plurality of contents, and information indicating the boundary of each content (“boundar”)
y ") are shown.

The body part has boundary information (“boundar”).
y ") is divided into two parts. The content body and information accompanying the content body are described for each part.

The first part in the mail data includes a content type ("Content-Type") and a transmission method ("Co-
tent-Transfer-Encoding ")
It is shown.

The second part in the mail data also includes a content type (“Content-Type”) and a transmission method (“Co-
tent-Transfer-Encoding ")
It is shown.

[0008]

However, handling mail data using the above-mentioned MIME has the following problems in a resource-saving environment such as a portable device where the memory is limited.

1) In order to indicate that a multi-part mail has a plurality of types of contents, boundary information other than the contents itself that is meaningful to the user who originally wants to send, and information attached to the contents for each part are included in the body. The size of the content body that is included in the content and that is originally meaningful to be sent is reduced.

[0010] In addition, in order to add boundary information so as not to be batted with data in the content main body, a) use boundary data having a sufficient length; or b) search in the content main body so as not to perform batting. It is necessary to consider.

[0011] If the boundary information has a sufficient length, the size of the content body that is originally meaningful to be sent becomes small, and if the content body is searched in order to avoid this, processing overhead occurs.

Further, in an operating environment in which mobile units that do not support the description of the body part using MIME coexist, there are the following problems.

2) In a receiving apparatus that does not support description of a body part using MIME, header information and boundary information included in the body part are displayed as a text.

In view of the above-mentioned problems, the present invention relates to transmission / reception of a mail composed of a header part and a body part. In addition, an object of the present invention is to provide a header portion with information indicating the configuration of the content of the body portion (content body) so that the content size of the body portion that can be transmitted and received is not reduced.

[0015]

In order to solve the above-mentioned problems, the present invention is directed to a multimedia data comprising a plurality of contents, in which case the body portion is information of only the content itself, and the header portion includes the body information. Receiving processing means for receiving the mail data, in which the configuration information of the part is indicated, and body configuration analyzing means for analyzing the configuration of the body part by analyzing the information of the header part of the mail data received by the receiving processing means. Prepare.

According to the present invention for solving the above-mentioned problems, even in the case of a divided mail which is divided and transmitted as a plurality of mail data, the body portion is information of only the content itself which is divided and transmitted and received, and Receiving means for receiving mail data, in which the configuration information of the body part is indicated by the part, and a body structure for analyzing the structure of the body part by analyzing the information of the header part of the mail data received by the receiving processing means Combining the content of the body part of the mail data divided into a plurality of pieces based on the configuration information of the body part analyzed by the analysis means and the body configuration analysis means,
Content processing means for requesting display processing and sound processing in accordance with the content type.

[0017]

(Embodiment 1) Embodiment 1 of the present invention will be described below with reference to FIGS. 1, 2, 3 and 4. FIG.

FIG. 1 shows a configuration diagram of a mail device 1 according to the first embodiment of the present invention. A transmission / reception processing unit 11 performs transmission / reception processing of mail data. Reference numeral 12 denotes mail data analysis means for analyzing mail data received by the transmission / reception means 11. An output unit 13 performs display processing and sound processing on the content analyzed and extracted by the mail data analysis unit 12. Email data analysis means 12
Separates the header part attached to the content body from the mail data in the body part which is the content body. The mail data analysis means 12 includes a header processing unit 14 for analyzing the header part and a content processing unit 15 for decoding the encoded body part data. The header processing unit 14 includes a body configuration analysis unit that analyzes how the body part is configured in addition to analyzing header information such as the sender information “From:”.

FIG. 2 is a configuration diagram of the content information header indicating the configuration information of the body part according to the first embodiment of the present invention. FIG. 2 shows a configuration of a content information header in the case of a multipart mail including a plurality of contents. In the case of a multi-part mail, the heading “content type” field 21 indicates that the mail is a multi-part mail. The “first content type” field 22 indicates the data type of the first content of the body part. "Size of first content" field 23
Indicates the data size of the first content in the body part. Hereinafter, the “Nth content size” field 2
Up to seven pieces of information corresponding to the number of contents included in the body part are shown.

FIG. 3 shows an example of mail data received by mail apparatus 1 according to Embodiment 1 of the present invention. The mail data 3 includes a header part 31 and a body part 32. The header part 31 includes sender information (“From”).
, Recipient information (“To”), and title information (“Su”
object ”), reception date and time information (“ Date ”),
And content configuration information (“X-CI”).
The content configuration information has the configuration shown in FIG. 2, and “mm” which is the first content type information is
Has a multipart email content type ("multi
ipart / mixed ”).

Hereinafter, “tp” is the first content 33
Is plain text ("text / play
n "). “23” indicates that the size of the first content 33 is 23 bytes. “Ig” indicates that the type of the second content 34 is image (GIF) data (“image / gif”), and the subsequent “(X-CTE: base64)”
Indicates that base64 encoding is performed. “300” indicates that the size of the second content 34 is 300 bytes.

As described above, the body part 32 is composed of the first content 33 and the second content 34.
The first content 33 includes a plain text "GIF
Send data. And the second content 34
Is data obtained by Base64 encoding image (GIF) data.

An outline of the operation when the mail apparatus 1 configured as described above shown in FIG. 1 receives the multipart mail shown in FIG. 3 will be described below.

The transmission / reception processing means 11 receives the mail data shown in FIG. 3 by communicating with a mail server or the like. The received mail data is subjected to header information analysis processing by the header processing unit 14 of the mail data analysis means 12. In the header processing unit 14, sender information,
Processing of title information and reception date and time information is performed. Further, the body configuration analysis unit 16 in the header processing unit 14 analyzes the content configuration information (“X-CI”). The body configuration analysis unit 16 outputs the body configuration information (“X
−CI ”), the body part 32 is composed of two contents as described in FIG. 3, the first content 33 is a 23-byte plain text,
The second content 34 is a 300-byte image (GI
F) Interpret that the data is base64 encoded data. The content processing unit 15 makes an output request to the output unit 13 based on the information on the body part obtained by the analysis processing of the body configuration analysis unit 16. Here, since the image (GIF) data as the second content 34 is base64 encoded, the content processing unit 15 performs the decoding process.

FIG. 4 shows a display example in which display processing has been performed by the output means 13. The text data as the first content and the image data as the second content are displayed.

In the structure of the content information header, the N-th content size may not be required as long as it can be derived from the entire content size and other content sizes.

In the present embodiment, an example has been shown in which only the information of the content body is included in the body portion.
If the mail is to attach IF data, "GIF =" R
01GOD1hMAA... "", The content body may be surrounded by "GIF =""and""".

(Embodiment 2) Hereinafter, Embodiment 2 of the present invention will be described with reference to FIGS. 1, 4, 5, 6, 7, and 8. FIG.

Referring to FIG. 1 and FIG.
It has already been explained.

FIG. 5 is a configuration diagram of a content information header according to the second embodiment of the present invention. FIG. 5 shows a configuration of a content information header when a mail is composed of a plurality of divided mail data.

In the case of a divided e-mail divided into a plurality of e-mail data, the head "content type" field 51 indicates that the e-mail is the divided e-mail data. In the case of divided mail data, as shown in FIG.
A “message identifier” field 52, a “division number” field 53, a “total division number” field 54,
A “content type of body part” field 55, a “division number for each part” field 56, and a “division number for each part” field 57 are included.

The “message identifier” field 52 includes:
This is identification information for associating a plurality of divided mail data as a single piece of mail data. The “division number” field 53 indicates a division number in the mail data divided into a plurality. The “total number of divisions” field 54 indicates how many pieces of mail data have been divided.
The “body part content type” field 55 indicates the content type of the body part. The “partition number for each part” field 56 indicates a division number for each content (each part) in the mail. The “number of divisions for each part” field 57 indicates how many contents in the divided mail are divided.

FIGS. 6, 7 and 8 show examples of mail data in the case where mail apparatus 1 receives the data as divided into three mail data in the second embodiment.

The mail includes plain text and image (GIF) data, and the plain text portion is one.
In one mail data, an image (GIF) data portion is divided into two mail data.

FIG. 6 shows first mail data received by mail apparatus 1 in the second embodiment, which is composed of a header part and a body part.

In the header portion, the sender information (“Fro
m)) and body part configuration information (“XC
I "). The body part configuration information has the configuration shown in FIG. 5 and includes the content type (“Mp”) at the beginning.
Split mail ("message / partia
l ").

Hereinafter, "01" in the next field is a "message identifier". "1/3" in the next field
Is the “division number” and “the total number of divisions”, and indicates that the mail is divided into three, and is the first mail data among them. "Tp" in the next field
Is the “content type of the body part”, and the data of the body part is a text plane (“text / play”).
n ") data.

"1/1" in the next field indicates "partition number for each part" and "number of divisions for each part". The text content is one piece of mail data shown in FIG. Not shown.

FIG. 7 shows the second mail data received by the mail device 1 according to the second embodiment, which comprises a header part and a body part, like the mail data shown in FIG. In the header part, like the mail data shown in FIG. 6,
In addition to information such as sender information ("From"), body part configuration information ("X-CI") is included.

Similarly to the mail data shown in FIG. 6, the body part configuration information (“X-CI”) has the structure shown in FIG. 5, and is divided by the head content type (“Mp”). "Message / partial").

Hereinafter, "01" in the next field is "message identifier". "2/3" in the next field
Is the “division number” and “the total number of divisions”, and indicates that the mail is divided into three, and that the data is the second mail data.

"Ig" in the next field is "content type of body part", and the data of the body part is G
This indicates that the data is IF data (“image / gif”), and the description of “(X-CTE: base64)” indicates that the data is base64 encoded.

"1/2" in the next field indicates "division number for each part" and "number of divisions for each part".
The content, which is IF data, is divided into two pieces of mail data, indicating that it is the first mail data among them.

FIG. 8 shows the third mail data received by the mail device 1 according to the second embodiment, which comprises a header part and a body part, like the mail data shown in FIG. In the header part, like the mail data shown in FIG. 6,
In addition to information such as sender information ("From"), body part configuration information ("X-CI") is included.

Similarly to the mail data shown in FIG. 6, the body part configuration information (“X-CI”) has the structure shown in FIG. 5, and is divided by the first content type (“Mp”). "Message / partial").

Hereinafter, "01" in the next field is "message identifier". "3/3" in the next field
Is the “division number” and “the total number of divisions”, and indicates that the mail is divided into three, and that this is the third mail data.

"Ig" in the next field is "content type of body part", and data of the body part is G
This indicates that the data is IF data (“image / gif”), and the description of “(X-CTE: base64)” indicates that the data is base64 encoded.

“2/2” in the next field indicates “division number for each part” and “division number for each part”.
The content, which is IF data, is divided into two pieces of mail data, and indicates that it is the second piece of mail data.

An outline of the operation when the mail device 1 shown in FIG. 1 receives the mail data shown in FIGS. 6, 7 and 8 will be described below.

First, the first mail data 6 shown in FIG.
The operation at the time of receiving is described.

The transmission / reception processing means 11 communicates with a mail server or the like to thereby generate mail data 6 shown in FIG.
To receive.

The received mail data 6 is subjected to header information analysis processing by the header processing unit 14 of the mail data analysis means 12.

The header processing section 14 processes sender information, title information, and reception date and time information. Further, the body configuration analysis unit 16 in the header processing unit 14 analyzes the content configuration information (“X-CI”).

The body structure analysis unit 16 analyzes the body structure information (“X-CI”) and identifies the mail data as divided based on the leading content type information (“Mp”). Further, since the “division number” is “1” and the “total division number” is “3”, the reception of the remaining divided mail data is awaited.

Next, the operation when the second mail data shown in FIG. 7 is received will be described.

The transmission / reception processing means 11 communicates with a mail server or the like, thereby transmitting the mail data 7 shown in FIG.
To receive.

The received mail data 7 is subjected to header information analysis processing by the header processing unit 14 of the mail data analysis means 12.

The header processing section 14 processes sender information, title information and reception date and time information. Further, the body configuration analysis unit 16 in the header processing unit 14 analyzes the content configuration information (“X-CI”).

The body structure analysis unit 16 analyzes the body structure information (“X-CI”) and identifies the mail data as divided based on the leading content type information (“Mp”). Furthermore, since the “division number” is “2” and the “total division number” is “3”, the reception of the remaining divided mail data is awaited.

Finally, the operation when the third mail data shown in FIG. 8 is received will be described.

The transmission / reception processing means 11 communicates with a mail server or the like, and thereby transmits the mail data 8 shown in FIG.
To receive.

The received mail data 8 is subjected to header information analysis processing by the header processing unit 14 of the mail data analysis means 12.

The header processing section 14 processes sender information, title information and reception date and time information. Further, the body configuration analysis unit 16 in the header processing unit 14 analyzes the content configuration information (“X-CI”).

The body structure analysis unit 16 analyzes the body structure information (“X-CI”) and identifies the mail data as divided based on the leading content type information (“Mp”). Further, since the “division number” is “3” and the “total division number” is “3”, it is searched whether or not the remaining divided mail data has been received.
Using the “message identifier”, a search is performed to determine whether or not the relevant mail data has been received.

The “message identifier” of the third mail data 8 shown in FIG. 8 is “01”, and the message identifier and “jiro @ is” of the sender information (“From”).
l. mei. cojp "is searched for other mail data.

Here, the message identifier and the sender information of the mail data 6 shown in FIG. 6, the message identifier and the sender information of the mail data 7 shown in FIG. 7, and the message identifier and the sender of the mail data 8 shown in FIG. It is determined that the three pieces of mail data are a single piece of mail because the user information matches.

In the content processing unit 15, based on the information of the body part analyzed by the body configuration analyzing unit 16, the second
The image data divided into the body part 72 of the mail data 7 and the body part 82 of the third mail data 8 are combined, and a base64 decoding process is performed.

Then, the text data included in the first mail data 6, the second mail data 7 and the third mail data 8 are connected to the output means 13, and the base 6
4 Requests output processing of decoded image data.

FIG. 4 shows a display example in which display processing has been performed by the output means 13. The text data as the first content, the second mail data, and the image data as the second content divided and received as the third mail data are displayed.

In the present embodiment, the divided mails are associated with the “message identifier” and the sender information (“From”), but are associated only with the “message identifier” without using the sender information. May be performed.

Note that the content information header in the present embodiment does not have to be in the format shown in the present embodiment.

For example, the content type information may be expressed by one byte instead of two-byte characters, or may be expressed as “text / plain” in the case of plain text.

In the present embodiment, an example is shown in which the “division number for each part” field 56 of the content information is provided, but the “division number” field 53, the “total division number” field 54, and the “ The “number of divisions for each part” field 56 may be eliminated by deriving from the three pieces of information in the “number of divisions” field 57.

[0074]

As described above, according to the present invention, the following effects are obtained in transmission and reception of a multipart mail and a divided mail.

1) There is no need to describe header information or boundary information in the body part, and the meaningful text size to be transmitted / received does not decrease.

2) Even if the receiving apparatus does not support the multi-part mail and the divided mail, the header information and the boundary information included in the body part are not displayed as the text.

3) There is no need to attach boundary information in consideration of not batting with the text data.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a mail device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a content information header according to the first embodiment.

FIG. 3 is a diagram showing an example of multipart mail data according to the first embodiment.

FIG. 4 is a diagram showing a display example of received mail data according to the first embodiment.

FIG. 5 is a configuration diagram of a content information header according to the second embodiment.

FIG. 6 is a diagram showing an example of first divided mail data according to the second embodiment.

FIG. 7 is a diagram showing an example of a second divided mail data according to the second embodiment.

FIG. 8 is a diagram showing a third example of divided mail data according to the second embodiment;

FIG. 9 is a diagram showing an example of conventional multipart mail data.

[Explanation of symbols]

 12 mail data analysis means 14 header processing unit 15 content processing unit 16 body configuration analysis unit

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hiromi Wada 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Atsushi Kato 1006 Odaka Kadoma Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. F term (reference) 5B089 GA25 GB04 HA10 JA31 JB06 JB24 KA02 KB06 KB09 LA01 LA11 LB13 LB14 5K030 GA18 HA06 HB21 LE14

Claims (5)

[Claims] 1. A mail data including a body part indicating a text and a header part indicating information of the body part. Even in the case of multimedia data including a plurality of contents, the body part is information of only the content body. Receiving processing means for receiving the mail data, wherein the configuration information of the body part is indicated by the header part, and analyzing information of the header part of the mail data received by the receiving processing means A body structure analyzing means for analyzing the structure of the body part according to the configuration information of the body part analyzed by the body structure analyzing means. Content processing means for making a request, and output processing means for performing output processing in response to a request from the content processing means A mail device characterized by the above-mentioned. 2. A mail data including a body part indicating a text and a header part indicating information of the body part. Even in the case of a divided mail transmitted and received as a plurality of pieces of mail data, the body part is divided. Receiving processing means for receiving the mail data, wherein the information is only information of the content itself transmitted and received, and the configuration information of the body part is indicated in the header part, and the mail received by the receiving processing means Body configuration analysis means for analyzing the configuration of the body part by analyzing information of the header part of data; and a mail divided into a plurality of pieces based on the configuration information of the body part analyzed by the body configuration analysis means Content processing means for combining the contents of the body part of the data and requesting display processing and sound processing in accordance with the content type; and A mail apparatus comprising output processing means for performing output processing in response to a request from the processing means. 3. The mail apparatus according to claim 1, wherein the configuration information of the body part includes a content type and a content size of the content included in the body part. 4. The configuration information of the body part according to claim 2, wherein a division identifier indicating that the mail is divided as a plurality of mail data, and that the divided mail is one piece of mail data. The mail identifier, the total number of messages indicating how many pieces of mail data are divided, the division number information indicating the order in the divided mail data, and a semantic unit in the body part. A mail apparatus comprising: a number of divisions for each part indicating how many pieces of mail data are divided into contents; and a content type of the contents which is semantically united. 5. A method for transmitting and receiving mail data including a body part indicating a text and a header part indicating information of the body part, wherein the header includes a description of the configuration information of the body part. In the case of a multi-part mail in which a part is composed of a plurality of contents, or in the case of a divided mail which is divided and transmitted and received as a plurality of mail data, the body part indicates header information indicating information of the content and a boundary of each content. An e-mail transmission / reception method for transmitting / receiving multi-part mails and divided mails without describing boundary information.