CN100396077C - Communication deivce and communication method - Google Patents
Communication deivce and communication method Download PDFInfo
- Publication number
- CN100396077C CN100396077C CNB2005100672620A CN200510067262A CN100396077C CN 100396077 C CN100396077 C CN 100396077C CN B2005100672620 A CNB2005100672620 A CN B2005100672620A CN 200510067262 A CN200510067262 A CN 200510067262A CN 100396077 C CN100396077 C CN 100396077C
- Authority
- CN
- China
- Prior art keywords
- data
- communication
- destination
- carry out
- session
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
A communication device having a unit which carries out a data communication by a call control protocol, the communication device which can improve a communication efficiency of the data communication. The communication device acquires various pieces of information of a destination device in an initiation call control session by the call control protocol and selects a data communication method in accordance with a type of the data of the data communication and various pieces of information of the destination device.
Description
Technical field
The present invention relates to a kind ofly in, carry out communication equipment of communicating by letter and program such as the various data of speech data, motion image data, view data and text data by the media session of setting up such as the call control protocol of session initiation protocol (SIP).
Background technology
The recent communication equipment that generally uses sends and the various data that receive such as IP phone is communicated by letter and Fax over IP is communicated by letter by IP (Internet protocol) network.A kind of execution is support voice data but also support the MFP (multi-function peripheral) of the data communication of view data to be suggested not only.For example, known communication equipment has the IP phone communication function and based on ITU-T (International Telecommunications Union-telecommunication department) suggestion Fax over IP communication function T.38.This known communication equipment can be communicated by letter with Fax over IP by IP phone communication simultaneously and be sent and receive view data.
In this communication equipment, when carrying out IP phone communication etc., call control protocol is carried out and the general corresponding function of public network switch, as the calling and the connection management of destination communication equipment.In many cases, H.323, SIP etc. is used for call control protocol.Especially, because SIP only sets up, change and end session, and do not relate to the content of session, so SIP is not limited to IP phone communication etc.Can be used for the media session between transmitter and receiver, set up such as all kinds communication protocol of SMTP (Simple Mail Transfer protocol) and HTTP (HTML (Hypertext Markup Language)).That is,, can in the media session of setting up, send and receive various types of data such as speech data, motion image data and view data according to SIP.In addition, a plurality of media sessions can be set up simultaneously, and polytype data communication can be carried out simultaneously.
In the media session of setting up by SIP, such a case is arranged: UDP (User Datagram Protoco (UDP)) replaces having the TCP (transmission control protocol) of error correction, is used as than the low transmission layer.In this case, execution or not correction process with the data communication on communication objective ground.Sending and receiving under the situation of speech data, when because noise etc. when breaking down in grouping, the part of speaker's words may be lost.Yet the audience can be from the preamble of lost part and hereinafter, understands the meaning and the content of speaker's words.Therefore, under the situation that media session is used to talk, for example under the situation of IP phone, have only that fault can throw into question under few situation.Yet sending and receive under the situation of view data or text data, when breaking down in grouping, receiver can not be from data reproduction raw image data or the urtext data that receive.As under the situation than the low transmission layer of media session, can activate error correction at TCP.Yet IP phone communication that requires real-time Data Transmission etc. can not be carried out reposefully.
In the media session of setting up by SIP, carry out under the situation of data communication,, caused the various restrictions that send about data with different under the situation of directly on TCP is connected, carrying out data communication.As a result, can not utilize frequency band to carry out data communication fully.Yet, always in media session, carry out data communication with the conventional SIP compatible communication equipment that carries out data communication by IP phone number designated destination, and irrelevant with the type (for example speech data, motion image data, Still image data and text data) of communication data.Therefore, compare with the IP communication equipment of directly carrying out the transmission process of Still image data, text data etc. on TCP is connected, conventional SIP compatible communication equipment needs the longer time to carry out transfer of data.
Summary of the invention
Consider that above-mentioned situation has proposed the present invention.The invention has the advantages that a kind of communication equipment of carrying out the unit of data communication by call control protocol that has is provided, and this communication equipment can improve the communication efficiency of data communication.Another advantage of the present invention is, a kind of communication equipment that the validity or the ineffectivity of error correction can be set according to the type of communication data is provided.
According to an aspect of the present invention, communication equipment is included in by the unit of execution in the media session of call control protocol foundation with the data communication of destination.This communication equipment also comprises determining unit and data communication units.This determining unit determines whether carrying out correction process with the data communication that carry out the destination according to the information about the media session that will set up.Determine to carry out under the situation of correction process in determining unit, data communication units is carried out data communication when carrying out correction process.Determine not carry out under the situation of correction process in determining unit, data communication units is carried out data communication and is not carried out correction process.
The information relevant with the media session that will set up comprises: the various information of obtaining in the calling control session that for example formed before the foundation of media session (for example, the type information of the communication data that will in media session, use, communication protocol, IP address, destination and destination port numbers), and by forming the various information (for example, the type information of the communication data that in media session, use, communication protocol, IP address, destination and destination port numbers) that the control session determines of calling out.
According to a further aspect in the invention, communication equipment is included in by the unit of execution in the media session of call control protocol foundation with the data communication of destination.This communication equipment also comprises the unit that every type data that send and receive is provided with the validity or the ineffectivity of error correction in media session.
According to a further aspect in the invention, communication equipment comprises information acquisition unit and data communication units.This information acquisition unit is starting the various information of obtaining the destination in the control session of calling out by call control protocol.This data communication units specifies in the positional information that comprises in the various information of obtaining, and sets up to be connected with the TCP of destination, and carry out data communication on the TCP that is set up connects.
According to a further aspect in the invention, communication equipment comprises first communication unit, Call Control Unit, second communication unit and data communication units.First communication unit is carried out the data communication with the destination in the media session of setting up by call control protocol.Call Control Unit obtains the various information of destination by call control protocol in starting calling control session, and executive termination is called out the control session and do not carried out data communication.The second communication unit specifies in the positional information that comprises in the various information of the destination that is obtained, and sets up to be connected with the TCP of destination, and carry out data communication on the TCP that is set up connects.When log-on data is communicated by letter, data communication units Information Selection first communication unit and one of second communication unit according to the rules, and carry out data communication by selected communication unit.
This provisioning information comprises: the various information of obtaining in the startup calling control session that for example formed before the foundation of media session (for example, the type information of the communication data that will in media session, use, communication protocol, IP address, destination and destination port numbers), and determine the various information (the communication data type information that for example, in media session, use, communication protocol, IP address, destination and destination port numbers) that in the media session that will set up, to use by form to start calling out the control session.As selection, communication equipment comprises the registering unit that in advance one of first communication unit and second communication unit is registered as the communication unit that will use in the equipment configuration information of communication equipment etc., and registered appointed information can be used as provisioning information.
According to this aspect of the present invention, communication equipment determines whether to carry out correction process according to the information relevant with the media session that will set up.In many cases, can specify in the type of the communication data that sends in the media session and receive by information about media session.Therefore, for example according to the characteristic of the data that send and receive, communication equipment can be carried out correction process to the view data that needs error correction etc., and the voice communication data that should not carry out error correction etc. is not carried out correction process.
For can improving data communication efficient to its data of carrying out data communication in the TCP connection such as Still image data and text data.
And, in starting calling control session, obtain the positional information of destination, and connect by specifying the positional information of being obtained to set up TCP.Therefore, the user of transmitter can pass through the only IP phone number of named place of destination, and the data of carrying out the destination send.Can omit the e-mail address of destination or the assigned operation of URI (unified resource identifier).
Information is selected arbitrary communication unit in first communication unit and the second communication unit according to the rules, as the communication unit that is used to carry out data communication.Therefore, can utilize suitable communication unit to carry out data communication according to the type of communication data.And, the correction process of executive communication data in the TCP connection.Therefore, for requiring, directly on connecting, TCP carries out data communication from the type of the data communication of the data reproduction raw image data received by receiver or urtext data.For the type of the data communication of preferably in media session, carrying out, can in media session, carry out data communication.
Description of drawings
Fig. 1 has shown the example according to the configuration of the fax MFP (communication equipment) of first embodiment of the invention.
Fig. 2 has shown the example of the definite table of error correction necessity.
Fig. 3 shown, when between according to the fax MFP (communication equipment) of first embodiment of the invention, carrying out data communication by SIP, and the example of the session that between fax MFP, forms.
Figure 4 shows that the flow chart of the processing operation of carrying out by transmitter (communication equipment).
Figure 5 shows that the flow chart of the processing operation of carrying out by receiver (communication equipment).
Fig. 6 has shown another example of the definite table of error correction necessity.
Fig. 7 has shown another example of the definite table of error correction necessity.
Fig. 8 has shown the example according to the configuration of the fax MFP (communication equipment) of second embodiment of the invention.
Fig. 9 has shown the example of the definite table of communication means.
Figure 10 shown, when between according to the fax MFP (communication equipment) of second embodiment of the invention, carrying out data communication by SIP, and the example of the session that between fax MFP, forms.
Figure 11 shown, when between according to the fax MFP (communication equipment) of second embodiment of the invention, form by SIP call out the control session after, when directly in TCP connections, carrying out data communication, at the example of the session that forms between the MFP of faxing.
Shown in Figure 12 is the flow chart of being operated by the processing that transmitter (communication equipment) is carried out.
Shown in Figure 13 is to handle operational flowchart by the transmission that transmitter (communication equipment) is carried out.
Shown in Figure 14 is to handle operational flowchart by the reception that receiver (communication equipment) is carried out.
Shown in Figure 15 is to handle operational flowchart by the reception that receiver (communication equipment) is carried out.
Figure 16 has shown another example of the definite table of communication means.
Figure 17 has shown another example of the definite table of communication means.
Embodiment
(first embodiment)
Below description is had the example of the fax MFP (multi-function peripheral) of G3 facsimile communication function, internet facsimile communication function etc., as communication equipment according to the embodiment of the invention.Except that fax MFP, if communication equipment can be carried out in the media session of setting up by call control protocol and the various data communication of destination, then the present invention also can be applied to the communication equipment of another kind of type.
Fig. 1 has shown the example of the configuration of fax MFP1.The MFP 1 that promptly faxes comprises: central processing unit (CPU) 2, read-only memory (ROM) 3, random-access memory (ram) 4, video memory 5, modulator-demodulator 6, network control unit (NCU) 7, codec 8, scanner unit 9, printer unit 10, display unit 11, operating unit 12, and Local Area Network interface 13.Each unit in the unit 2 to 13 all connects via bus 14.
As shown in Figure 2, the error correction necessity determines the configuration information of correction process is carried out in table 4a storage about whether to every type of data that send and receive in media session, in other words, storage about whether to carry out the configuration information of correction process such as the flesh and blood of every type of data of voice, moving image, (communication equipment) device data and image (rest image).That is, determine every type of data that send and receive to be provided with the validity or the ineffectivity of error correction among the table 4a in media session in the error correction necessity.
The view data of 9 pairs of original documents of scanner unit scans.For example, scanner unit 9 comprises charge-coupled device (CCD) color line sensor, mould/number (A/D) transducer and image processing circuit etc.Printer unit 10 takes out printing paper from input tray, and the view data that receives, the view data of scanning etc. are printed on the printing paper.Display unit 11 is right after operating unit 12 LCD (LCD) formation afterwards by for example being provided at, and shows various screen messages.Operating unit 12 comprises various operation keyss etc.The user carries out various operations from operating unit 12.
Above-mentioned fax MFP 1 is embedded with UDP/IP (User Datagram Protoco (UDP)/Internet protocol), TCP/IP (transmission control protocol/Internet protocol), SIP, RTP (RTP), RTSP (real-time streaming protocol), SDP (Session Description Protocol), SMTP (Simple Mail Transfer protocol), HTTP (HTML (Hypertext Markup Language)) etc.Therefore, the various data that send in the media session of setting up and receive such as speech data, motion image data, view data (Still image data) and text data can controlled by the calling of SIP.
In addition, fax MFP 1 is embedded with unique error-correction protocol, and this error-correction protocol is more contour than SIP, RTP, and than operating in the low protocol layer of the communication protocol of view data that sends and receive or text data.Therefore, in communication protocol that is used for media session and data content, do not relate to the correction process of carrying out by this uniqueness error-correction protocol by the communication protocol exchange.Therefore, the advantage of correction process is: the communication protocol of using in the media session is not limited to specific protocol.
Unique error-correction protocol forms for example following agreement between the transmitter and receiver.That is, send under the data conditions to receiver in the media session of setting up by SIP at transmitter, transmitter is divided into some unit with data, and serial number is added on the piece of division.Transmitter adds the assigned position in the piece to, as the end of piece all data being added together total value in the piece (verification and).Receiver is divided the data of reception in the same manner as described above.Receiver calculates all data is added total value in the piece together, and with this total value with add that the value of assigned position compares in the piece to.Be worth under the situation consistent with each other at these two, receiver determines that the data in the piece do not have defective.Under these two the mutual inconsistent situations of value, receiver is determined the data defectiveness in the piece, and to the data retransmission requests of transmitter execution to this piece.Then, receiver is number paid-in data without any defective of reorganization in order, and transmitter is according to the data of re-send request may repeating transmission.Can use hash (hush) value replace verification and.
Next, to describe with reference to the precedence diagram of figure 3 and the flow chart of Fig. 4 and Fig. 5, when the fax MFP 1 with above-mentioned configuration and function sets up media session with another fax MFP 1 with the configuration identical with this fax MFP 1 and function by SIP (call control protocol), and when carrying out data communication, performed processing operation.Further, according to by as the CPU 2 of control unit according to the order that the control program of storage among the ROM 3 produces, carry out the processing operation that will describe with reference to figure 3 to Fig. 5.For convenience of description, the fax MFP 1 that become transmitter will be called as transmitter 1A, and the fax MFP 1 that will become receiver will be called as receiver 1B.
Shown in the precedence diagram of Fig. 3, at first form to call out control session (below, this callings control session will be called as " start to call out and control session ") between transmitter 1A and the receiver 1B by SIP.That is, the session of the IP phone number of transmitter 1A by having specified receiver 1B participates in request " invitations ", the calling of asking receiver 1B to sip server 20.In addition, IP address and the information such as port numbers that will use are sent to receiver 1B (T1) as the various information of transmitter in media session.
When receiver 1B response during from the calling of sip server 20, receiver 1B receives " invitation " and such as the various information of the positional information of transmitter 1A.Then, receiver 1B sends to sip server 20 with success response sign indicating number " 200 OK ".Together with success response sign indicating number " 200 OK ", for example receiver 1B sends whether the type information of the communication data that IP address, the port numbers that will use, receiver 1B as the positional information of receiver 1B can use or communication protocol and indication receiver 1B support error correction by unique agreement information in media session, as the various information (R1) relevant with receiver 1B.
Transmitter 1A sends the information " ACK (replying) " that success response sign indicating number " 200 OK " received in indication after the various information of receiving success response sign indicating number " 200 OK " and receiver 1B.In addition, transmitter 1A will send to receiver 1B such as the information of communication data type, communication protocol and the port numbers that will use by sip server 20 in media session, be used for the information (T2) of the media session that will set up as decision.Then, between transmitter 1A and receiver 1B, set up media session, and, carry out various data communication according to the communication data type by calling out the consult to decide of carrying out in the control session in above-mentioned startup, communication protocol, communication port etc.
After data communication in media session finished, " goodbye " that transmitter 1A will ask to disconnect the SIP connection sent to sip server 20.Sip server 20 sends to receiver 1B (T3) with " goodbye " after receiving " goodbye ".Then, when receiver 1B sends to sip server 20 (R2) with success response sign indicating number " 200 OK ", and sip server 20 is also with success response sign indicating number " 200 OK " when sending to transmitter 1A, a series of conversation end, and communication is disconnected.Further, after media session finishes, the calling control session that forms till communication is disconnected will be called as " end call control session ".
Next, will the processing operation etc. that be determined whether the data communication of carrying out at the media session of setting up is carried out correction process by transmitter 1A being used for of carrying out be described with reference to the flow chart of figure 4.
Transmitter 1A passes through SIP call receiver 1B (S1) at T1.Under the situation of the response that has R1 (S2: be), transmitter 1A exchanges various information when the control session is called out in formation and the startup of receiver 1B, and in other words, execution is used to set up the required negotiation of media session (S3).Transmitter 1A decision relevant with media session, such as the information (S4) of the type of data communication that will in media session, use, communication protocol and communication port.Then, transmitter 1A determines whether to carry out the correction process (S5) of the data communication that sends and receive according to the type information of the data communication in the middle of the information relevant with media session that is determined in media session.
That is, the error correction necessity that transmitter 1A interrelates according to the type with the data communication that will carry out in media session is determined the setting of table 4a, determines whether to carry out correction process.Be specially, as shown in Figure 2, if be voice or moving image in the type of data communication of S4 decision, then because error correction is set to invalidly, so transmitter 1A determines not carry out correction process.If the type of data communication in the S4 decision is device data or image, then be set to effectively, so transmitter 1A determines to carry out correction process (S5) owing to error correction.
Under the situation of the definite execution of transmitter 1A correction process (S5: be), if transmitter 1A is according to starting the various information of calling out the receiver 1B that obtains in the control session, determine that receiver 1B can utilize TCP to carry out correction process (S6: be), then transmitter 1A will " reply (ACK) " etc. and send to receiver 1B (S7).Transmitter 1A carries out receiver 1B in the media session of being set up data send, and carry out correction process (S8) by TCP simultaneously.
Determine that at S6 receiver 1B can not utilize TCP to carry out (S6: not) under the situation of correction process at transmitter 1A, transmitter 1A determines according to starting the various information of calling out the receiver 1B that obtains in the control session whether receiver 1B supports correction process (S9) by unique agreement.Support by unique agreement that at receiver 1B transmitter 1A sends to receiver 1B (S10) with " ACK " etc. under the situation of correction process (S9: be).Transmitter 1A carries out receiver 1B in the media session of being set up data send, and carry out correction process (S11) by unique agreement simultaneously.
Simultaneously, determine not carry out (S5: not) under the situation of correction process at S5 at transmitter 1A, and determine that at S9 receiver 1B does not support by unique agreement under the situation of correction process that (S9: not), transmitter 1A sends to receiver 1B (S12) with " ACK " etc. at transmitter 1A.Then, the data that transmitter 1A carries out receiver 1B send, and do not carry out correction process (S13).Further, at S12, transmitter 1A can send indication will not carry out the information of correction process.
At last, between transmitter 1A and receiver 1B, form end call control session, and carry out the disconnection process (S14) that SIP connects.Further, if at S2 not from the response of receiver 1B, in other words, if transmitter 1A receives the answer code of misdirection content, and do not receive the success response sign indicating number " 200 OK " of R2, then transmitter 1A executive communication fault processing (S15).For example, handle, the message of indication garble reason, error code etc. are presented on the display unit 11, perhaps print from printer unit 10 as garble.
Next, will processing operation as the opposing party's of the communication of transmitter 1A receiver 1B be described with reference to the flow chart of figure 5.
When receiver 1B at T1 by sip response during from the calling of transmitter 1A (S51), receiver 1B is when the control session is called out in formation and the startup of transmitter 1A, exchange various information, in other words, execution is used to set up the required negotiation of media session (S52).Receiver 1B from transmitter 1A receive and " ACK " together, about the decision information (S53) of the media session that will set up.
Under the situation that TCP is used as the transport layer in the media session (S54: be), receiver 1B carries out Data Receiving in the media session of being set up, and carries out correction process (S55) by TCP simultaneously.
Under the situation of carrying out correction process by unique agreement (S54: not, S56: be), receiver 1B carries out Data Receiving, carries out correction process (S57) by unique agreement simultaneously.Further, in this case, UDP is used as transport layer.
(S54: not, S56: not), receiver 1B carries out Data Receiving and does not carry out correction process (S58) under the situation of not carrying out correction process.Further, in this case, UDP is used as transport layer.
When the Data Receiving of step S55, S57 or S58 has been finished dealing with, and receiver 1B by sip server 20 when transmitter 1A receives " goodbye ", receiver 1B sets up the end call control session with transmitter 1A, and carries out the disconnection process (S59) that SIP connects.
As mentioned above, according to the communication equipment of first embodiment of the invention, be real-time speech data etc. if the type of the communication data that sends in media session and receive is requirement, then send and receive speech data etc. and do not carry out error correction.Intactly reappear under the situation of communication data (such as text data and view data) of initial data at receiver requiring, send and receive view data etc., carry out error correction simultaneously.Therefore, can wait according to characteristic, the target of the communication data that utilizes SIP to send and receive and carry out multimedia communication.
Next, will another example of first embodiment be described.The fax MFP 1 of another example of first embodiment comprises the definite table of the error correction necessity shown in Fig. 6 or Fig. 7, rather than the definite table of error correction necessity 4a, and determines to show to carry out definite processing of S6 according to this error correction necessity.
Error correction necessity shown in Fig. 6 determines that table 4b is provided with the validity and the ineffectivity of error correction to each destination port numbers.In definite processing of S5, the error correction necessity that transmitter 1A basis and the destination port numbers about in the middle of the information of media session that determines at S4 interrelate is determined the setting of table 4b, determines whether to carry out correction process.Be specially, as shown in Figure 6, if be " 4006 " in the destination port numbers of S4 decision, then because error correction is set to invalidly, so transmitter 1A determines not carry out correction process.If the destination port numbers in the S4 decision is " 4004 ", then because error correction is set to effectively, so transmitter 1A determines to carry out correction process.
Error correction necessity shown in Fig. 7 is determined validity and the ineffectivity of table 4c to each destination IP address setting error correction.In definite processing of S5, transmitter 1A basis and the error correction necessity that interrelates in the IP address, destination about in the middle of the information of media session of S4 decision are determined the setting of table 4c, determine whether to carry out correction process.Be specially, as shown in Figure 7, if be " 128.2.3.1 " in the IP address, destination of S4 decision, then because error correction is set to invalidly, so transmitter 1A determines not carry out correction process.If the IP address, destination in the S4 decision is " 128.2.3.2 ", then be set to effectively, so transmitter 1A determines to carry out correction process owing to error correction.
For determining whether to carry out correction process, can carry out definite processing of above-mentioned S5 according to the information except that above-mentioned communication data type, IP address, destination and destination port numbers about media session.
In the above description, fax MFP 1 sets up the single medium session.Yet, setting up a plurality of media sessions at the same time and also exchange simultaneously under the situation of polytype communication data, transmitter 1A and receiver 1B carry out the processing operation of S5 to S13 and S54 to S58 to each media session.Therefore,, also can be only the communication data of the type that needs correction process be carried out correction process, and the communication data of the type that do not need correction process is not carried out correction process even setting up under the situation of a plurality of media sessions.Further, have at receiver 1B under the situation of an IP address, transmitter 1A preferably determines the error correction necessity table 4a or 4b rather than the definite table of error correction necessity 4c, is used for definite processing of S5.
(second embodiment)
Below description is had the example of the fax MFP of G3 facsimile communication function, internet facsimile communication function etc., as communication equipment according to second embodiment of the invention.Except that fax MFP, if communication equipment can be in the media session of setting up by call control protocol carried out and the various data communication of destination with being connected at TCP, then the present invention also can be applied to the communication equipment of another kind of type.
Fig. 8 has shown the example of the configuration of fax MFP 101.The MFP 101 that promptly faxes comprises CPU 102, ROM 103, RAM 104, video memory 105, modulator-demodulator 106, NCU 107, codec 108, scanner unit 109, printer unit 110, display unit 111, operating unit 112 and LAN interface 113.Each unit in the unit 102 to 113 all connects via bus 114.
As shown in Figure 9, communication means determines that table 104a stores about following configuration information: for every type of communication data, in other words, for flesh and blood such as every type of communication data of voice, moving image, (communication equipment) device data and image (rest image), whether in media session, carry out data communication, perhaps whether directly in the TCP connection and in media session, do not carry out data communication.Communication means determines that table 104a also stores the configuration information of about whether every type communication data being carried out correction process.
The view data of 109 pairs of original documents of scanner unit scans.For example, scanner unit 109 comprises CCD color line sensor, A/D converter and image processing circuit etc.Printer unit 110 takes out printing paper from input tray, and the view data that receives, the view data of scanning etc. are printed on the printing paper.Display unit 111 constitutes by for example being provided at the LCD that is right after after the operating unit 112, and shows various screen messages.Operating unit 112 comprises various operation keyss etc.The user carries out various operations from operating unit 112.
LAN interface 113 is to be used for the interface that connects between fax MFP 101 and LAN 116.Fax MFP 101 carries out by LAN interface 113 and also is connected to the client PC (not shown) of LAN 116 and communicating by letter of router one 19.Fax MFP 101 also passes through the various data communication of the communication equipment 118 of another the compatible SIP on router one 19 execution and the IP network 117.
Above-mentioned fax MFP 101 is embedded with UDP/IP, TCP/IP, SIP, RTP, RTSP, SDP, SMTP, HTTP etc.Therefore, SMTP, HTTP etc. be can pass through, view data (Still image data) and text data etc. directly in the TCP connection, sent and receive.Can be in the media session of setting up by the calling control of SIP, by transmission and reception speech data and motion image datas such as RTP.Can in the media session of setting up by the calling control of SIP, send and receive view data (Still image data) and text data etc. by SMTP, HTTP etc.
In addition, fax MFP 101 is embedded with unique error-correction protocol, and this error-correction protocol is operated in the low protocol layer of communication protocol more contour than SIP, RTP and ratio transmission and reception view data or text data.Therefore, in communication protocol that is used for media session and data content, do not relate to the correction process of carrying out by this uniqueness error-correction protocol by the communication protocol exchange.Therefore, the advantage of correction process is: the communication protocol of using in the media session is not limited to specific protocol.
Unique error-correction protocol forms for example following agreement between the transmitter and receiver.That is, send under the data conditions to receiver in the media session of setting up by SIP at transmitter, transmitter is divided into some unit with data, and serial number is added on the piece of division.Transmitter adds the assigned position in the piece to, as the end of piece all data being added together total value in the piece (verification and).Receiver is divided the data of reception in the same manner as described above.Receiver calculates all data is added total value in the piece together, and with this total value with add that the value of assigned position compares in the piece to.Be worth under the situation consistent with each other at these two, receiver determines that the data in the piece do not have defective.Under these two the mutual inconsistent situations of value, receiver is determined the data defectiveness in the piece, and to the re-send request may of transmitter execution to the data of this piece.Then, receiver reorganizes in order number paid-in data without any defective, and the data retransmitted according to re-send request may of transmitter.Can use hash (hush) value replace verification and.
Next, to describe with reference to the precedence diagram of Figure 10 and Figure 11 and the flow chart of Figure 12 to Figure 15, when the fax MFP 101 with above-mentioned configuration and function carried out data communication with another MFP 101 that faxes with the configuration identical with this fax MFP 101 and identical functions, performed processing was operated.Further, according to by as the CPU 102 of control unit according to the order that the control program of storage among the ROM 103 produces, carry out the processing operation that will describe with reference to figures 10 to Figure 15.For convenience of description, the fax MFP 101 that become transmitter will be called as transmitter 101A, and the fax MFP 101 that will become receiver will be called as receiver 101B.
Shown in the precedence diagram of Figure 10 and Figure 11, at first between transmitter 101A and receiver 101B, form and call out the control session by SIP.That is, the session of the IP phone number of transmitter 101A by having specified receiver 101B participates in request " invitations ", the calling of asking receiver 101B to sip server 120.In addition, IP address and the port numbers that will use etc. are sent to receiver 101B (T101) as the various information of transmitter in media session.Further, in a second embodiment, the calling control session that formed before setting up media session will be called as " start and call out the control session ".
When receiver 101B response during from the calling of sip server 120, receiver 101B receives " invitation " and such as the various information of the positional information of transmitter 101A.Then, receiver 101B sends to sip server 120 with success response sign indicating number " 200 OK ".Together with success response sign indicating number " 200 OK ", for example receiver 101B sends whether the type information of the communication data that IP address, the port numbers that will use, receiver 101B as the positional information of receiver 101B can use or communication protocol and indication receiver 101B support error correction by unique agreement information, as the various information (R101) relevant with receiver 101B.
Be chosen in the media session under the situation about carrying out with the data communication of destination at transmitter 101A, as shown in figure 10, transmitter 101A sends the information " ACK " that success response sign indicating number " 200 OK " is received in indication.In addition, transmitter 101A is by sip server 120, will send to receiver 101B such as the information of type, communication protocol and the port numbers of the communication data that will use in media session, is used for the information (T102) of the media session that will set up as decision.Then, between transmitter 101A and receiver 101B, set up media session.Transmitter 101A carries out the various data communication with receiver 101B according to the type by calling out the communication data of the consult to decide of carrying out in the control session in above-mentioned startup, communication protocol, communication port etc.
After data communication in media session finished, " goodbye " that transmitter 101A will ask to disconnect the SIP connection sent to sip server 120.Sip server 120 sends to receiver 101B (T103) with " goodbye " after receiving " goodbye ".Then, when receiver 101B sends to sip server 120 (R102) with success response sign indicating number " 200 OK ", and sip server 120 is also with success response sign indicating number " 200 OK " when sending to transmitter 101A, and a series of conversation end and communication are disconnected.Further, after media session finishes, the calling control session that forms till communication is disconnected will be called as " end call control session ".
Simultaneously, receive at R101 after success response sign indicating number " 200 OK " and various information that receiver 101B sends at transmitter 101A, select to connect the data communication of carrying out with the destination at transmitter 101A by setting up new TCP, and in media session, do not carry out under the situation of data communication, as shown in figure 11, at transmitter 101A just after T102 transmission information, " goodbye " that transmitter 101A just will ask to disconnect the SIP connection sends to sip server 120, and the end call of formation and receiver 101B control session, and disconnect the SIP connection.Then, transmitter 101A asks the TCP of receiver 101B to connect again, and sets up TCP connection (T104) between transmitter 101A and receiver 101B.Transmitter 101A directly carries out receiver 101B in the TCP connection of being set up data send (T105).After data sending processing is finished, carry out the disconnection process (T106) that TCP connects.
In the above description, transmitter 101A in the media session of setting up by SIP or directly in TCP connections, the execution data communication.Yet, carry out under the situation of data communication by polytype communication protocol at the same time, the data communication (with reference to Figure 10) of a part can be in media session, carried out, and other data communication (with reference to the lower part of Figure 11) can be in the TCP connection that rebulids, carried out.
Next, to describe with reference to the flow chart of Figure 12 and Figure 13, when carrying out startup calling control session, transmitter 101A is to carry out data communication or directly carry out under the situation of data communication the processing operation that transmitter 101A is performed etc. in execution data communication in the TCP connection in media session by selecting.
Under the situation of transmitter 101A by the data communication of individual data communication execution and receiver 101B (S84: be), transmitter 101A carries out the communication process (S85) that will describe in the back.Simultaneously, under the situation of carrying out by a plurality of data communication between transmitter 101A and the receiver 101B of communicating by letter, for example under voice data communication and situation that view data is communicated by letter or under voice data communication and situation that animation data is communicated by letter, transmitter 101A carries out the communication process (S86) that will describe in the back to each data communication.
Further, if at S82 not from the response of receiver 101B, in other words, if transmitter 101A receives the answer code of misdirection content, and do not receive the success response sign indicating number " 200 OK " of R102, transmitter 101A executive communication fault processing (S87) then.For example, handle, the message of indication garble reason, error code etc. are presented on the display unit 111 or from printer unit 110 print as garble.
Next, the communication process of S85 and the S86 of transmitter 101A will be described with reference to the flow chart of Figure 13.In addition, the difference of the communication process content of carrying out at S85 and S86 is: at S85, a data communication is carried out the communication process that will describe in the back; And, the communication process that will describe is in the back carried out in each data communication in a plurality of data communication at S86.The content of the communication process that each data communication is carried out is identical.
At first, transmitter 101A selects whether to carry out the data communication (S101) in media session according to the type of the data communication that will carry out.That is, the communication means that the type of transmitter 101A basis and the data communication that will carry out interrelates is determined the setting of table 104a, and selecting is to carry out data communication in media session, still connects and sets up new TCP and connect and carry out data communication by finishing SIP.For example, as shown in Figure 9, be under the situation of voice or moving image in the type of the data communication that will carry out, because communication means is set to " media session/RTP ", so transmitter 101A is chosen in and carries out data communication in the media session.Type in the data communication that will carry out is under the situation of device data or image, and transmitter 101A selects to connect and to set up new TCP and connect and carry out data communication (S101) by finishing SIP.
Be chosen under the situation of carrying out data communication in the media session (S101: be) information (S102) of the type such as the data communication that will in media session, use, communication protocol and communication port etc. that transmitter 101A decision is relevant with media session at transmitter 101A.Then, transmitter 101A determines whether to carry out the correction process (S103) of the data communication that sends and receive according to the type information of the data communication in the middle of the information relevant with media session that is determined in media session.That is, the communication means that the type of transmitter 101A basis and the data communication carried out in media session interrelates is determined the setting of table 104a, determines whether to carry out correction process.For example, as shown in Figure 9, be under the situation of voice or moving image in the type of the data communication that will carry out, because that error correction is set to is invalid, so transmitter 101A determines not carry out correction process.Type in the data communication that will carry out is under the situation of device data or image, and owing to error correction is set to effectively, so transmitter 101A determines to carry out correction process (S103).
Under the situation of the definite execution of transmitter 101A correction process (S103: be), if transmitter 101A is according to starting the various information of calling out the receiver 101B that obtains in the control session, determine that receiver 101B can utilize TCP to carry out correction process (S104: be), then transmitter 101A sends to receiver 101B (S105) with " ACK " etc.Transmitter 101A carries out receiver 101B in the media session of being set up data send, and carry out correction process (S106) by TCP simultaneously.
At S104, if transmitter 101A is according to starting the various information of calling out the receiver 101B that obtains in the control session, (S104: not), then transmitter 101A determines whether receiver 101B supports correction process (S107) by unique agreement to determine can not to utilize TCP to carry out correction process by receiver 101B.Support by unique agreement at receiver 101B under the situation of correction process (S107: be) that transmitter 101A sends to receiver 101B (S108) with " ACK " etc.Transmitter 101A carries out the data communication of receiver 101B in the media session of being set up, carry out correction process (S109) by unique agreement simultaneously.
Simultaneously, determine not carry out (S103: not) under the situation of correction process at S103 at transmitter 101A, and determine that at S107 receiver 101B does not support by unique agreement under the situation of correction process that (S107: not), transmitter 101A sends to receiver 101B (S110) with " ACK " etc. at transmitter 101A.Transmitter 101A carries out the data transmission of receiver 101B and does not carry out correction process (S111).Further, at S110, transmitter can send indication will not carry out the information of correction process.
Simultaneously, at S101, select to finish the SIP connection and connect (S101: deny) under the situation of carrying out data communication by setting up new TCP at transmitter 101A, transmitter 101A forms the end call control session with receiver 101B immediately, and carries out the disconnection process (S113) that SIP connects.Then, transmitter 101A carries out and specifies in the TCP connection processing that starts the positional information (IP address, port numbers) of calling out the receiver 101B that obtains in the control session, and sets up TCP connection (S114).Then, transmitter 101A directly carries out receiver 101B in the TCP connection data send, and carry out correction process (S115) by TCP simultaneously.After data sending processing was finished, transmitter 101A carried out the disconnection process (S116) that TCP connects.
Next, will be with reference to the flow chart of Figure 14 and Figure 15, the processing operation as the opposing party's of the communication of transmitter 101A receiver 101B is described.
Under the situation that TCP is used as the transport layer in the media session (S154: be), receiver 101B carries out Data Receiving in the media session of being set up, and carries out correction process (S155) by TCP simultaneously.
Under the situation of carrying out correction process by unique agreement (S154: not, S156: be), receiver 101B carries out Data Receiving, carries out correction process (S157) by unique agreement simultaneously.Further, in this case, UDP is used as transport layer.
(S154: not, S156: not), receiver 101B carries out Data Receiving and does not carry out correction process (S158) under the situation of not carrying out correction process.Further, in this case, UDP is used as transport layer.
Data Receiving at step S155, S157 or S158 is finished dealing with, and receiver 101B receives " goodbye " afterwards by sip server 120 from transmitter 101A, receiver 101B forms the end call control session with transmitter 101A, and carries out the disconnection process (S159) that SIP connects.
Simultaneously, in the TCP connection requests from transmitter 101A of receiver 101B basis at S114, set up with situation that the TCP of transmitter 101A is connected under (S201), receiver 101B directly carries out Data Receiving in the TCP connection, simultaneously by TCP execution correction process (S202).After Data Receiving was finished, receiver 101B carried out the disconnection process (S203) that TCP connects.
Under transmitter 101A carried out situation with a plurality of data communication of receiver 101B, the reception processing (S151 to S159 and S201 to S203) of (S101 to S116) and receiver 101B was handled in the transmission that transmitter 101A is carried out in each data communication simultaneously.Therefore, for example carry out about under the situation as the data communication of the speech data of the type of the data communication that will carry out and Still image data simultaneously, set up simultaneously and be used to carry out the media session of voice data communication and be used to carry out the TCP that Still image data communicates by letter be connected at transmitter 101A and receiver 101B.
As mentioned above, according to the fax MFP (communication equipment) 101 of second embodiment of the invention, be that requirement is under the situation of real-time speech data etc. in the type of the communication data that sends and receive, in media session, carry out data communication and do not carry out correction process.Intactly reappearing under the situation of communication data of view data of initial data at the receiver place such as requiring, can in media session, carry out in the correction process, perhaps by disconnect SIP connect and set up new TCP connect carry out correction process in, carry out data communication.Therefore, according to fax MFP 101, wait according to characteristic, the target of the communication data that utilizes SIP to send and receive and to carry out the data communication process.
In media session, carry out under the situation of data communication, caused various restrictions, and can not utilize frequency band fully about data communication.Yet, if the directly data communication of execution rest image etc. in TCP connections can be carried out data communication fully efficiently.
Even intactly reappearing under the situation of communication data of view data of initial data at the receiver place such as requiring, also can determine the setting of table 104a according to communication means, when in the media session of setting up by SIP, carrying out correction process, carry out data communication by TCP or unique agreement.
Next, will another example of second embodiment be described.The fax MFP 101 of another example of second embodiment comprises the definite table of the communication means shown in Figure 16 or 17, rather than communication means is determined table 104a.Determine table according to the communication means shown in Figure 16 or Figure 17, fax MFP 101 carries out the selection processing of S101 and definite processing of S103.Further, the communication means shown in Figure 17 determines that the application of table is based on following condition: at S84 negates to determine, and does not carry out the processing operation of S86.
So the communication means shown in Figure 16 is determined corresponding each the port numbers storage pass, destination of table 104b and carry out data communication in media session, still directly the configuration information of execution data communication in TCP connections rather than in media session, and about whether carrying out the configuration information of correction process.In the selection of S101 is handled, has the setting that communication means is determined to show the transmitter 101A basis of 104b and determined table 104b at the communication means that the destination port numbers that S83 obtains interrelates, selecting is to carry out data communication in media session, still directly carries out data communication in the TCP connection rather than in media session.For example, as shown in figure 16, port numbers is under the situation of " 4004 " or " 4006 " in the destination, because communication means is set to " media session/RTP ", therefore is chosen in the media session and carries out data communication by RTP.Port numbers is under the situation of " 4008 " or " 4010 " in the destination, because communication means is set to " TCP connection ", therefore selects directly to carry out data communication in the TCP connection rather than in media session.In definite processing of S103, determine the setting of table 104b to determine whether to carry out correction process according to the communication means that interrelates with the destination port numbers of obtaining at S83.Therefore for example, as shown in figure 16, port numbers is under the situation of " 4004 " or " 4006 " in the destination, because that error correction is set to is invalid, determines not carry out correction process.Port numbers is under the situation of " 4008 " or " 4010 " in the destination, because error correction is set to effectively, therefore determines to carry out correction process.
So the communication means shown in Figure 17 determines that corresponding each IP address, the destination storage of table 104c is closed and carry out the still direct configuration information of execution data communication in TCP connections rather than in media session of data communication in media session, and about whether carrying out the configuration information of correction process.In the selection of S101 is handled, the communication means that has the transmitter 101A basis of the definite table of communication means 104c and interrelate in the IP address, destination that S83 obtains is determined the setting of table 104c, determine in media session, to carry out data communication, still directly in the TCP connection rather than in media session, carry out data communication.For example, as shown in figure 17, be under the situation of " 128.2.3.1 " or " 128.2.3.2 " in IP address, destination, because communication means is set to " media session/RTP ", therefore determine in media session, to carry out data communication by RTP.In IP address, destination is under the situation of " 128.2.3.3 " or " 128.2.3.4 ", because communication means is set to " TCP connection ", therefore determines directly to carry out data communication in the TCP connection rather than in media session.In definite processing of S103, determine the setting of table 104c to determine whether to carry out correction process according to the communication means that interrelates with the IP address, destination that obtains at S83.For example, as shown in figure 17, be under the situation of " 128.2.3.1 " or " 128.2.3.2 " in IP address, destination, therefore because that error correction is set to is invalid, determine not carry out correction process.In IP address, destination is under the situation of " 128.2.3.3 " or " 128.2.3.4 ", because error correction is set to effectively, therefore determines to carry out correction process.
Further, the selection of S101 handle and definite processing of S103 in, can be according to the information except that above-mentioned communication data type, IP address, destination and destination slogan about media session, carry out about whether carrying out the definite of correction process.
In other example of second embodiment and second embodiment, the example of fax MFP 101 has been described.Also can be by carry out the above-mentioned processing operation of fax MFP 101 such as the all-purpose computer of PC.That is, the program that is used for carrying out above-mentioned processing operation can be embedded the facsimile software that is used for PC etc., and can carry out above-mentioned communication process operation by carrying out this program.
Claims (17)
1. communication equipment, it comprises:
Deriving means is used for calling out the control session by call control protocol in startup and obtains the various information of destination;
Determine device, be used for being identified for sending the Data Transport Protocol of described transmission data according to the various information of being obtained and/or the type that sends data; And
Dispensing device is used for by by described definite device established data host-host protocol described transmission data being sent to the destination.
2. communication equipment according to claim 1 is characterized in that, described dispensing device comprises:
First communicator is used for carrying out data at the media session of setting up by described call control protocol and sends;
The second communication device, be used for start calling out by described call control protocol after the control session obtains the various information of destination, executive termination is called out the control session and is not carried out the data transmission, the positional information that comprises in the various information of the destination that obtains by specifying in is set up with the TCP of destination and is connected, and carries out the data transmission in the TCP connection of being set up;
Choice device, the information that is used for when log-on data is communicated by letter is according to the rules selected one of described first communicator and described second communication device, and carries out data communication by selected communicator.
3. communication equipment according to claim 1 is characterized in that, described dispensing device comprises:
First communicator is used for carrying out data at the media session of setting up by described call control protocol and sends, and carries out error correction simultaneously;
The second communication device is used for carrying out the data transmission and not carrying out error correction at the media session of setting up by described call control protocol;
Third communication device, be used for start calling out by described call control protocol after the control session obtains the various information of destination, executive termination is called out the control session and is not carried out the data transmission, the positional information that comprises in the various information of the destination that obtains by specifying in is set up with the TCP of destination and is connected, and carries out the data transmission in the TCP connection of being set up;
Choice device, the information that is used for when log-on data is communicated by letter is according to the rules selected one of described first communicator, described second communication device and described third communication device, and carries out data communication by selected communicator.
4. communication equipment comprises:
Data communication equipment is used in the data communication of the media session execution of setting up by call control protocol with the destination;
Determine device, be used for determining whether correction process is carried out in described data communication according to the information relevant with the media session of being set up; And
Control device, be used for determining to carry out under the situation of correction process at described definite device, be controlled at and carry out described data communication when carrying out correction process, and determine not carry out under the situation of correction process at described definite device, control is carried out described data communication and is not carried out correction process.
5. communication equipment according to claim 4 is characterized in that, carries out described correction process by error-correction protocol, does not wherein relate to described correction process in communication protocol of using and the data content by this communication protocol exchange in described media session.
6. communication equipment according to claim 4 is characterized in that, carries out described correction process by TCP/IP.
7. communication equipment according to claim 4 is characterized in that, carries out described correction process in the layer higher than UDP/IP.
8. communication equipment according to claim 4 is characterized in that, described definite device determines whether to carry out described correction process according to the type of the data that send and receive in described media session.
9. communication equipment according to claim 4 is characterized in that, described definite device determines whether to carry out described correction process according to port numbers.
10. communication equipment according to claim 4 is characterized in that, described definite device determines whether to carry out described correction process according to the IP address.
11. a communication equipment comprises:
First communicator is used in the data communication of the media session execution of setting up by call control protocol with the destination;
The second communication device, be used for start calling out by described call control protocol after the control session obtains the various information of destination, executive termination is called out the control session and is not carried out data communication, the positional information that comprises in the various information of the destination that obtains by specifying in, set up with the TCP of destination and be connected, and on the TCP that is set up connects, carry out data communication; And
Choice device, the information that is used for when log-on data is communicated by letter is according to the rules selected one of described first communicator and described second communication device, and carries out this data communication by selected communicator.
12. communication equipment according to claim 11 is characterized in that, described provisioning information is the various information of calling out the destination that obtains in the control session in described startup.
13. communication equipment according to claim 11 is characterized in that, described provisioning information is a port numbers.
14. communication equipment according to claim 11 is characterized in that, described provisioning information is the IP address.
15. a communication means may further comprise the steps:
Starting the various information of obtaining the destination in the control session of calling out by call control protocol;
According to the type of various information of being obtained and/or transmission data, be identified for sending the Data Transport Protocol of described transmission data; And
By determined Data Transport Protocol data are sent to the destination.
16. communication means according to claim 15 is characterized in that, described forwarding step sends described data by one of following steps:
Carrying out data in the media session of setting up by described call control protocol sends; And
After in startup calling control session, obtaining the various information of destination by described call control protocol, executive termination is called out the control session and is not carried out the data transmission, the positional information that comprises in the various information of the destination that obtains by specifying in, set up with the TCP of destination and be connected, and in the TCP connection of being set up, carry out data and send.
17. communication means according to claim 15 is characterized in that, described forwarding step sends described data by one of following steps:
In the media session of setting up by described call control protocol, carry out data and send, carry out error correction simultaneously;
In the media session of setting up by described call control protocol, carry out data and send, and do not carry out error correction; And
After in startup calling control session, obtaining the various information of destination by described call control protocol, executive termination is called out the control session and is not carried out the data transmission, the positional information that comprises in the various information of the destination that obtains by specifying in, set up with the TCP of destination and be connected, and in the TCP connection of being set up, carry out data and send.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004124495A JP4013153B2 (en) | 2004-04-20 | 2004-04-20 | Communication apparatus and program |
| JP124495/2004 | 2004-04-20 | ||
| JP124636/2004 | 2004-04-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1691730A CN1691730A (en) | 2005-11-02 |
| CN100396077C true CN100396077C (en) | 2008-06-18 |
Family
ID=35346832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100672620A Active CN100396077C (en) | 2004-04-20 | 2005-04-20 | Communication deivce and communication method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4013153B2 (en) |
| CN (1) | CN100396077C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104168401A (en) * | 2013-05-16 | 2014-11-26 | 佳能株式会社 | Reception end facsimile apparatus and control method thereof |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009021941A (en) * | 2007-07-13 | 2009-01-29 | Rohm Co Ltd | Information communication terminal, radio communication device, and radio communication network |
| US8347160B2 (en) | 2007-07-13 | 2013-01-01 | Rohm Co., Ltd. | Information communication terminal, radio communication apparatus and radio communication network system capable of performing communication corresponding to purpose |
| CN103152378B (en) * | 2012-12-25 | 2016-03-02 | 中国移动通信集团江西有限公司 | A kind of transmission method of network data, system and client |
| JP6524791B2 (en) * | 2015-05-15 | 2019-06-05 | パナソニックＩｐマネジメント株式会社 | Wireless communication apparatus and wireless communication method |
| US10848271B2 (en) | 2016-08-01 | 2020-11-24 | Sony Semiconductor Solutions Corporation | Communication unit and communication system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281626A (en) * | 1997-12-04 | 2001-01-24 | 英国电讯有限公司 | Communications network |
| JP2002247130A (en) * | 2001-02-20 | 2002-08-30 | Nippon Telegr & Teleph Corp <Ntt> | Sip tunneling device and communication system using the same |
| JP2002354064A (en) * | 2001-05-29 | 2002-12-06 | Sony Corp | Transmission device, receiving device and transmission and receiving device |
| US20040001224A1 (en) * | 2002-06-21 | 2004-01-01 | Tomohito Kajiwara | Network facsimile apparatus, facsimile communication system, and method that can efficiently transport packets |
| US20040052214A1 (en) * | 2002-09-12 | 2004-03-18 | Teh Jin Teik | System for routing data via the best communications link based on data size, type and urgency and priority |
-
2004
- 2004-04-20 JP JP2004124495A patent/JP4013153B2/en not_active Expired - Lifetime
-
2005
- 2005-04-20 CN CNB2005100672620A patent/CN100396077C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281626A (en) * | 1997-12-04 | 2001-01-24 | 英国电讯有限公司 | Communications network |
| JP2002247130A (en) * | 2001-02-20 | 2002-08-30 | Nippon Telegr & Teleph Corp <Ntt> | Sip tunneling device and communication system using the same |
| JP2002354064A (en) * | 2001-05-29 | 2002-12-06 | Sony Corp | Transmission device, receiving device and transmission and receiving device |
| US20040001224A1 (en) * | 2002-06-21 | 2004-01-01 | Tomohito Kajiwara | Network facsimile apparatus, facsimile communication system, and method that can efficiently transport packets |
| US20040052214A1 (en) * | 2002-09-12 | 2004-03-18 | Teh Jin Teik | System for routing data via the best communications link based on data size, type and urgency and priority |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104168401A (en) * | 2013-05-16 | 2014-11-26 | 佳能株式会社 | Reception end facsimile apparatus and control method thereof |
| US9723172B2 (en) | 2013-05-16 | 2017-08-01 | Canon Kabushiki Kaisha | Facsimile apparatus, control method thereof, and storage medium |
| CN104168401B (en) * | 2013-05-16 | 2018-07-27 | 佳能株式会社 | Receiving terminal picture unit and its control method |
| US10230868B2 (en) | 2013-05-16 | 2019-03-12 | Canon Kabushiki Kaisha | Facsimile apparatus, control method thereof, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1691730A (en) | 2005-11-02 |
| JP4013153B2 (en) | 2007-11-28 |
| JP2005311608A (en) | 2005-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1719861B (en) | Image communication device | |
| EP1583310B1 (en) | Telephone and adaptor for voice and video communication over IP | |
| US7948970B2 (en) | Communication terminal device, communication method and electronic mail server | |
| US7471672B2 (en) | IP telephone and IP telephone call method | |
| JP3826107B2 (en) | Image communication apparatus, control method therefor, program, and storage medium | |
| JP6151911B2 (en) | Image processing apparatus, control method thereof, and program | |
| CN100396077C (en) | Communication deivce and communication method | |
| US7068763B2 (en) | Communication terminal device | |
| US20050243871A1 (en) | Communication deivce and communication method | |
| JP3743128B2 (en) | Communication terminal device with electronic mail function and program recording medium thereof | |
| JP2005094662A (en) | Facsimile machine adaptive to network | |
| CN1578312B (en) | Ip communication device | |
| JP3849642B2 (en) | Communication terminal device | |
| JP4868440B2 (en) | Image communication device | |
| JP2006054539A (en) | Internet facsimile machine | |
| JP4154673B2 (en) | Image communication device | |
| JP3596240B2 (en) | Communication terminal device with e-mail function | |
| JP3925728B2 (en) | Facsimile device | |
| JP4089653B2 (en) | Communication apparatus and program | |
| JP3684772B2 (en) | Communication terminal device with electronic mail function and program recording medium thereof | |
| JP5867776B2 (en) | Facsimile machine | |
| JP2006025178A (en) | Facsimile machine | |
| JP4608969B2 (en) | Information communication equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |