JP5412375B2 - Content retransmission method, content transmission device, and content retransmission program - Google Patents

Description

The present invention retransmits content when a communication error occurs during transmission / reception of digital content (document, photograph, data, etc.) between the content transmission device and the content reception device. method, content transmission device, about your and content re-transmission program.

  2. Description of the Related Art Conventionally, as a system for transmitting and receiving digital contents, there is a method (deemed audio method) for performing communication using audio signals as FAX signals that have been performed on public switched telephone networks. A system that implements transmission and reception of digital content using call control of SIP (Session Initiation Protocol) by applying this conventional technology connects to a content receiving device by transmitting a telephone number from the content transmitting device, and performs content transmission. Become a method.

  Here, the content transmission apparatus is an apparatus having a function of a key telephone, a scanner function for reading a paper medium content (such as a document), and a function for printing the received content (such as a document). Similar to the content transmission device, the content reception device is a device having a function of a key telephone, a scanner function for reading a paper medium content (such as a document), and a function for printing the received content (such as a document). It is.

  The content transmission device has a function of continuously transmitting a plurality of digital contents in one call. That is, after specifying a telephone number and selecting a plurality of digital contents, a call is made to establish a call with the content receiving apparatus. Thereafter, a TCP session is established, and digital content is transmitted and received using the TCP session.

  However, communication may be cut off due to an abnormality on the network or content receiving apparatus side during transmission / reception of a plurality of digital contents. Examples of the abnormality on the content receiving device side include exhaustion of the reception capacity of the content receiving device. In such a case, it is necessary to transmit a plurality of digital contents from the content transmitting apparatus to the content receiving apparatus again by the same procedure.

JP 2004-326572 A JP 2006-025178 A

  As described above, in the past, when communication was interrupted during transmission / reception of a plurality of digital contents, the plurality of digital contents to be transmitted were selected again, and the telephone number of the content receiving apparatus was input. It is necessary to send content. In addition, even if there is digital content that can be normally received by the content receiving device before the communication is cut off, there is no function for the content transmitting device to grasp the same digital content. There is a problem that it must be transmitted in duplicate. Even in the prior art, requesting the content transmission apparatus to continue the digital content received halfway by the content reception apparatus is realized by HTTP, but conversely, a mechanism for retransmitting digital content from the content transmission apparatus halfway Is not realized.

In view of the above-described conventional technology, the present invention is a content re-transmission method capable of early transmission / reception of all digital contents even when a communication abnormality occurs during transmission / reception of a plurality of digital contents, content transmission device, an object of the present invention to provide your and content re-transmission program.

To achieve the above object, according to the first aspect of the present invention, in the content re-transmission method, a communication abnormality occurring during transmission / reception of digital content between the content transmission device and the content reception device is detected. A detection step; a confirmation step for confirming a reception state of the digital content between the content transmission device and the content reception device when a communication abnormality is detected in the detection step; and a reception confirmed in the confirmation step A retransmission step of retransmitting only the part of the digital content that is not normally received by the content reception device from the content transmission device to the content reception device based on the state, and in the confirmation step, the communication CallID that identifies the call at the time of an abnormality and is transmitted when the communication is abnormal The content transmitting apparatus notifies the content receiving apparatus of the JobID that identifies the digital content, and the presence / absence of the digital content that was received halfway when the communication was abnormal, and was received halfway when the communication was abnormal The content receiving apparatus notifies the content transmitting apparatus of the capacity number for specifying where the digital content should be retransmitted from and the reception capability of the content receiving apparatus. In the retransmission step, the content receiving apparatus If it does not have the reception capability, the digital content that failed to be transmitted is retransmitted. If the content reception device has the reception capability, there was a reception request for the digital content that failed to be transmitted. to re-transmitted from the content capacity part The gist.

The invention according to a second aspect is the invention according to the first aspect, wherein in the confirmation step, the content transmitting apparatus notifies the content receiving apparatus of the CallID and the JobID as one structure, and The gist is that the content receiving apparatus notifies the content transmitting apparatus of the capacity number and the reception capability as another structure .

In order to achieve the above object, according to a fourth aspect of the present invention, in the content transmission device, the digital content is being transmitted / received between the content storage unit that stores the digital content and the content reception device. When a communication abnormality occurs, a retransmission operation unit for notifying the content receiving device of a retransmission confirmation request for confirming the reception state of the digital content, and a retransmission confirmation response indicating the reception state of the digital content A content transmission unit that retransmits only the digital content of the part that is not normally received by the content reception device to the content reception device when notified from the device, and the retransmission calculation unit is configured to perform communication when the communication is abnormal CallID for specifying a call and the digital signal transmitted when the communication error occurred When a job ID for specifying content is notified, and the content transmission unit does not have the reception capability, the content transmission unit retransmits the digital content that has failed to be transmitted, and the content reception device has the reception capability. In the case where it is provided , the gist of the present invention is to retransmit the digital content that has failed to be transmitted from the content capacity portion requested to be received .

In order to achieve the above object, the fourth aspect of the invention is characterized by causing a computer to execute each step in the first or second invention in a content retransmission program.

According to the present invention, the content retransmission method capable of implementing transmission and reception of all digital content even when a communication error occurs in the middle of transmitting and receiving a plurality of digital content at an early stage, the content transmitting device, Contact and A content retransmission program can be provided.

It is a block diagram of the content re-transmission system in embodiment of this invention. It is an implementation sequence diagram of the content retransmission system in the embodiment of the present invention. It is a figure which shows the internal processing algorithm of the content retransmission system in embodiment of this invention. It is a figure which shows an example of the message | telegram definition in embodiment of this invention. It is a figure which shows the specific example of the message | telegram in embodiment of this invention. It is a figure which shows an example of the hardware constitutions of the originating side apparatus or the destination side apparatus in embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a configuration diagram of a content retransmission system according to an embodiment of the present invention. This content re-transmission system is a system capable of transmitting and receiving digital content using a telephone number, and includes a calling-side device 110, a called-side device 120, and a SIP server 130 as shown in FIG. ing. The SIP server 130 connects to the calling side device 110 and the called side device 120 via the network, responds to a call connection request from the calling side device 110, and performs mediation for establishing a call with the called side device 120. Has the function to perform.

  The originating device 110 is a content transmission device that transmits digital content, and includes a SIP stack unit 111, a content transmission unit 112, a retransmission calculation unit 113, and a content storage unit 114. The SIP stack unit 111 has a function of connecting to the SIP server 130 via the network and establishing a call with the called device 120 having the designated telephone number. After the SIP stack unit 111 establishes a call with the called-side device 120, the content transmitting unit 112 reads the digital content designated by the calling-side device 110 from the content storage unit 114, and sends it to the called-side device 120. It has a function of transmitting content and a function of notifying the destination device 120 and the retransmission calculation unit 113 of the transmitted state. The retransmission calculation unit 113 has a function of monitoring the communication state of the SIP stack unit 111 and the content transmission unit 112, a function of detecting an abnormal end of communication based on the communication state, and transmitting digital content again when an abnormality is detected. A function for performing a re-calling process and a retransmission confirmation process necessary for content retransmission, and a function for instructing the content transmission unit 112 to perform content transmission. The content storage unit 114 has a function of storing digital content to be transmitted and a function of permitting reference to digital content in response to a reference request from the content transmission unit 112 or the retransmission calculation unit 113.

  The destination device 120 is a content receiving device that receives digital content, and includes a SIP stack unit 121, a content receiving unit 122, a retransmission calculation unit 123, and a content storage unit 124. The SIP stack unit 121 is connected to the SIP server 130 via a network and has a function of establishing a call with the calling side device 110 having a designated telephone number. The content receiving unit 122 has a function of receiving digital content transmitted from the calling device 110 after the call with the calling device 110 is established in the SIP stack unit 121 and storing the digital content in the content storage unit 124, and a digital It has a function of notifying the receiving device 110 and the retransmission calculation unit 123 of the content reception state. The retransmission calculation unit 123 has a function of monitoring the communication state of the SIP stack unit 121 and the content reception unit 122, a function of detecting an abnormal end of communication based on the communication state, and a reception state of the digital content received when the abnormality is detected Has a function of responding to the originating device 110 when a retransmission confirmation request is made. The content storage unit 124 has a function of storing digital content to be transmitted and a function of permitting reference to digital content in response to a reference request from the content reception unit 122 or the retransmission calculation unit 123.

  FIG. 2 is an implementation sequence diagram of the content retransmission system in the embodiment of the present invention. As shown in this figure, the calling device 110 is connected to the SIP server 130 via the network, and further connected to the called device 120. That is, the calling device 110 uses the telephone number to identify the called device 120 and establish a call, and transmits the digital content stored in the calling device 110 to the called device 120. When a communication abnormality (hereinafter, sometimes referred to as “error”) that occurs during transmission of a plurality of digital contents is detected, a call is made again to transmit digital contents that have not yet been transmitted. Then, re-transmission confirmation regarding call identification at the time of call disconnection due to an error that occurred immediately before and identification of digital content in the middle of transmission is performed with the destination device 120. Further, when the digital content to be transmitted is specified and the digital content is transmitted to the destination device 120, the communication is completed. Hereinafter, the characteristic steps will be described in more detail.

  Step S201 indicates that a communication abnormality has occurred during transmission / reception of digital content between the calling device 110 and the called device 120. This communication abnormality (S201) is an unexpected disconnection of the network, a failure in the destination device 120, a capacity over, etc., and the destination device 120 cannot receive digital content any more. Represents that.

  Step S202 is a step of detecting that a communication abnormality (S201) has occurred. That is, when the retransmission calculation unit 113 in the originating device 110 detects that a communication abnormality (S201) has occurred, it determines again whether to transmit digital content, and there is digital content that has not been transmitted yet. Instructs re-call processing.

  Step S203 is a communication sequence indicating a retransmission confirmation request. In other words, in order to obtain a retransmission confirmation response, the calling device 110 specifies a CallID (call ID) that identifies a call at the time of communication abnormality (S201) and a JobID that identifies the digital content that was transmitted at the time of communication abnormality (S201). (Job ID) is notified to the destination device 120.

  Step S204 is a communication sequence indicating a retransmission confirmation response. In other words, when receiving the retransmission confirmation request 203, the receiving device 120 receives the digital content that has been received halfway at the time of communication abnormality (S201) and the digital content that has been received halfway at the time of communication abnormality (S201). The calling device 110 is notified of the capacity number (bytes) specifying where to retransmit.

  Step S205 is digital content retransmission processing. In other words, when receiving the retransmission confirmation response 204, the calling device 110 identifies the digital content being transmitted stored in the content storage unit 114, and transmits the digital content to the called device 120 again. I do.

  FIG. 3 is a diagram showing an internal processing algorithm of the content retransmission system in the embodiment of the present invention. Here, an internal processing algorithm of the originating device 110 required from communication abnormality detection (S202) to retransmission (S205) in FIG. 2 is shown.

  First, when a communication abnormality occurs during transmission / reception of digital content to / from the destination device 120 (S301), the calling device 110 detects the communication error and determines whether there is untransmitted content. (S302). If there is unsent content, the call history is referred to (S303), and it is confirmed from the data existing in the call history that communication has ended abnormally, and the callee, CallID, and JobID are checked (S304). On the other hand, if unsent content exists, the communication is terminated.

  Next, it is determined whether or not to perform retransmission (S305). Here, if it is set to perform retransmission on the calling side device 110 side, a re-call / call establishment is performed (S306), and a retransmission confirmation request is notified to the called side device 120 (S307). On the other hand, if it is not set to perform retransmission on the originating device 110 side, the communication is terminated.

  When the retransmission confirmation request is notified to the destination device 120 (S307), when it is confirmed that the retransmission is necessary on the destination device 120 side, a retransmission confirmation response is received from the destination device 120 (S308). ). Therefore, after confirming from the destination device 120 that there is digital content being received and where the digital content should be transmitted, a determination is made in accordance with the reception capability of the destination device 120 (S309). The receiving capability of the destination device 120 will be described in detail later (see 404 in FIG. 4).

  Finally, if the destination device 120 does not have a predetermined reception capability, the digital content that failed to be transmitted is retransmitted (S310). On the other hand, if the called-side device 120 has a predetermined reception capability, the digital content that has failed to be transmitted is retransmitted from the content capacity portion requested to be received (S311).

  FIG. 4 is a diagram illustrating an example of message definitions of the retransmission confirmation request (S203) and the retransmission confirmation response (S204) in FIG. Here, an example is shown in which information is notified using a telegram of a structure using HTTP and xml after a call connection using SIP and establishing a TCP session. The item number 401 specifies a CallID that identifies a call when communication is abnormal. The item number 402 designates a JobID that identifies the digital content that was transmitted when the communication was abnormal, that is, a JobID that identifies the digital content that failed to be transmitted / received. Item No. 403 indicates the transmitted file capacity at the time of communication abnormality, and designates where the digital content should be transmitted at the time of retransmission. The item number 404 indicates the reception capability of the destination device 120, and specifies whether or not there is a capability corresponding to transmission from the middle of the content.

  FIG. 5 is a diagram illustrating a specific example of a message of the retransmission confirmation request (S203) and the retransmission confirmation response (S204) in FIG. As shown in this figure, the retransmission confirmation request (S203) indicates <callid> 123468@send.example.org </ callid> indicating call setting ID information at the time of error and Job start request ID information at the time of error. Realized as <jobid> 2010031125 </ jobid>. The retransmission confirmation response (S204) includes <partialGET> bytes = 196608-</ partialGET> indicating the transmitted file capacity at the time of error and <resume> on </ resume> indicating the reception capability of the destination device 120. Realized.

  As described above, according to the content re-transmission system in the embodiment of the present invention, even when a communication abnormality occurs during transmission / reception of a plurality of digital contents, information on the call and transmission is transmitted from the originating device. Since the notification is sent from 110 to the destination device 120, the content reception state of the destination device 120 can be obtained on the source device 110 side. Accordingly, once the digital content that has been normally transmitted / received is not transmitted / received again, all digital content can be transmitted / received at an early stage. As a result, it goes without saying that communication costs and unnecessary use of network resources can be reduced because digital content is not transmitted redundantly.

  In the above description, the originating device 110 detects a communication abnormality and notifies the receiving device 120 of a confirmation request for the digital content reception state. However, the present invention is not limited to this. Absent. That is, the receiving device 120 may detect a communication abnormality and notify the calling device 110 of the reception state of the digital content at the time of the communication abnormality.

  In the above description, it is assumed that digital content exists in file units, and a case where a plurality of digital contents are transmitted / received has been described. In this case, the digital content (file) that is not normally received by the destination device 120 is retransmitted. Of course, which unit is considered as one digital content is determined according to the performance of the destination device 120 and the like, and is not particularly limited.

  Although not mentioned in the above description, the hardware configuration of the originating device 110 and the terminating device 120 includes, for example, a central processing control device 101, a ROM (Read Only Memory) 102, a RAM as shown in FIG. A (Random Access Memory) 103 and an input / output interface 109 are connected via a bus 110. An input device 104, a display device 105, a communication control device 106, and a storage device 107 are connected to the input / output interface 109. The central processing control device 101 is a processing device that implements a series of processing such as data calculation and processing. The input device 104 is a keyboard or a touch panel for inputting information. The display device 105 is a liquid crystal display or the like for displaying information. The communication control device 106 is a LAN card or a modem. The storage device 107 is a semiconductor storage device or a magnetic disk device. Of course, the hardware configuration of FIG. 6 is merely an example.

  In addition, the present invention can be realized not only as a content retransmission system, but also as a content retransmission method using a characteristic processing unit included in such a content retransmission system as a step. It can also be realized as a program executed by a computer. It goes without saying that such a program can be distributed via a recording medium such as a CD-ROM or a transmission medium such as the Internet.

DESCRIPTION OF SYMBOLS 110 ... Originating device 111 ... SIP stack part 112 ... Content transmission part 113 ... Retransmission calculating part 114 ... Content preservation | save part 120 ... Destination side device 121 ... SIP stack part 122 ... Content receiving part 123 ... Retransmission arithmetic part 124 ... Content preservation | save part 130 ... SIP server

Claims (4)

A detection step for detecting a communication abnormality that occurs during transmission and reception of digital content between the content transmission device and the content reception device;
A confirmation step of confirming a reception state of the digital content between the content transmission device and the content reception device when a communication abnormality is detected in the detection step;
Based on the reception state confirmed in the confirmation step, a retransmission step of retransmitting only the part of the digital content that is not normally received by the content reception device from the content transmission device to the content reception device. ,
In the confirmation step, the content transmitting apparatus notifies the content receiving apparatus of a CallID that identifies a call at the time of the communication abnormality and a JobID that identifies the digital content that was transmitted at the time of the communication abnormality. Presence or absence of the digital content that has been received halfway, the number of capacities that specify where the digital content that was received halfway at the time of the communication abnormality should be retransmitted, and the reception capability of the content receiving device The content receiving device notifies the content transmitting device;
In the retransmission step, if the content reception device does not have reception capability, the digital content that has failed to be transmitted is retransmitted. If the content reception device has reception capability, the transmission fails. A content re-transmission method characterized in that the digital content is re-transmitted from a content capacity portion requested to be received.   In the confirmation step, the content transmitting device notifies the content receiving device of the CallID and the JobID as one structure, and the content reception as the other structure of the capacity number and the receiving capability. The content retransmission method according to claim 1, wherein the device notifies the content transmission device. A content storage unit for storing digital content;
When a communication error occurs during transmission / reception of the digital content to / from the content reception device, a retransmission calculation unit that notifies the content reception device of a retransmission confirmation request for confirming the reception state of the digital content When,
When a retransmission confirmation response indicating the reception state of the digital content is notified from the content receiving device, content transmission for retransmitting only the digital content of the part that the content receiving device has not normally received to the content receiving device With
The retransmission calculation unit notifies CallID for specifying a call at the time of the communication abnormality and JobID for specifying the digital content transmitted at the time of the communication abnormality,
The content transmitting unit retransmits the digital content that failed to be transmitted if the content receiving device does not have the receiving capability, and failed to transmit if the content receiving device has the receiving capability. The content transmitting apparatus, wherein the digital content is retransmitted from a content capacity portion requested to be received.   A content re-transmission program for causing a computer to execute the steps described in any one of claims 1 to 2.

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