TW200803356A - Negotiation method and system for dual tone multi-frequency (DTMF) digits transmission - Google Patents

Abstract

A negotiation method for dual tone multi-frequency (DTMF) digits transmission is implemented in a SIP user agent client (UAC) using VoIP and supporting a plurality of DTMF digits transmission schemes, each corresponding to a priority. The UAC delivers an INVITE request to create a session. Before inputting any DTMF digit required by a user agent server (UAS), the UAC queries one or more digits transmission schemes supported by the UAS. One of the supported schemes is selected based on the priorities. A DTMF digit is then transmitted via the selected scheme to the UAS.

Description

200803356. IX. INSTRUCTIONS: TECHNICAL FIELD OF THE INVENTION The present invention relates to computer network technology, and in particular to a protocol for a dual-tone multi-frequency (DTMF) digital transmission method. [Previous Skills "] The Session Initiation Protocol (SIP) architecture is based on the computer network and is a control protocol at the application layer. It can establish a multimedia call and can adjust or end the call. . Voice over Internet protocol (VoIP) also has the dual tone multi-frequency (DTMF) digital requirements in traditional telecommunication, but some problems may occur during actual implementation. The most common method in SIP is to specify a SIP format that sends DTMF. For example, Nortel or Cisco will send DTMF using its default SIP format. However, if the sip device using this method encounters a receiver that does not support the default method, an error will occur. There are also some devices that send DTMF in-band (in4and) mode, but due to the nature of VoIP itself, voice packets are unreliable. Therefore, this way of transmitting DTMF often causes problems. If the caller uses the try-error method, the call-error mechanism fails because the receiver device directly ignores the unsupported format and does not respond to the error at all.

Client's Docket No.: TT's Docket No: 0695-A40807twf.doc/Joseph/2005-12-20 5 200803356 SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a method and system for agreeing to a dual-tone multi-frequency digital transmission method. Based on the above object, an embodiment of the present invention provides a protocol for a dual-voice multi-frequency (DTMF) digital transmission method, which is implemented at a call end, and the call end supports a multi-transmission method of dual-multi-frequency digital, and each transfer mode corresponds to a priority. order. The above-mentioned caller sends a first request to start a call. Before being required to input the dual-multiple-frequency signal by a receiver, the above-mentioned terminal queries one or more types of dual-tone multi-frequency digital transmission modes supported by the receiver. According to the above-mentioned priority order of the above-mentioned plural transmission method, a dual-multi-frequency digital transmission mode supported by the above-mentioned receiving end is determined. A dual-multiple-frequency digital number is transmitted to the above-mentioned receiver in the above-mentioned determined transmission mode. In addition, an embodiment of the present invention provides a protocol for a dual-audio multi-frequency (DTMF) digital delivery mode, which is implemented at a call end, and the call end supports a complex transfer mode of dual-multi-frequency digital, and each transfer mode corresponds to a priority order. The above system includes a complex encoder, a detector, a control unit, and a communication unit. The above complex encoders are respectively configured to perform encoding corresponding to the above complex transfer mode. After the first utterer sends a first request to start a call, the detector queries one or more dual-tone multi-frequency digital transmission modes supported by the receiver before requesting the input of the dual-multi-frequency signal by a receiver. And according to the above-mentioned priority order of the above-mentioned plural transfer mode, a dual-multi-frequency digital transmission mode supported by the above-mentioned receiving end is determined. The control unit corresponds to one of the encoders in the above-mentioned determined transmission mode.

Client’s Docket No.: TT^ Docket No: 0695-A40807twf.doc/Joseph/2005-12-20 6 200803356 Dual-multi-frequency digital editing. The communication unit transmits the encoded double-tone multi-log word to the upper talk terminal in the above-mentioned determined manner. [Embodiment] The following description is a preferred embodiment of the present invention. The purpose is to clarify the principles of the invention and should not be construed as limiting the invention.

The scope is subject to the definition of the scope of patent application. X The following proposes a method and system for a dual-voice multi-frequency (1) 11^17) digital transmission method. Referring to Fig. 1, a dual-audio multi-frequency (DTMF) digital transmission mode cooperation system 101 is implemented in a speech terminal, for example, as an integrated access device (IAD). System 1〇! Can be combined with the SIP user terminal (ciient) to implement the application. The calling terminal 100 supports the DTMF digital plural transmission mode and determines the DTMF digital transmission mode to be used in a call in accordance with a predetermined priority order. In other words, in the utterance terminal 1, each delivery mode corresponds to a priority order. The supported methods may include transmitting DTMF digits in a SIP signal, an out-of-band (0Ut-0f-band) signal, or an in-band signal. It is more accurate to pass the DTMF digits with the SIP signal, followed by the out-of-band signal. Therefore, the method of transmitting the DTMF digits by the SIP signal is preferred, followed by the out-of-band signal and finally the in-band signal. In this embodiment, the calling terminal 100 supports four delivery modes. In the priority order of the delivery mode, the first and second delivery modes respectively correspond to the method of transmitting DTMF digits by SIP signals by Cisco and Nortel of Canada, and third. The transfer method corresponds to the method disclosed in RFC 2833.

Client's Docket No.: TT^ Docket No: 0695-A40807twf.doc/Joseph/2005-12-20 200803356 - The DTMF digits are transmitted as out-of-band signals, while the fourth transmission method is used to discard the in-band signals (ie media data) Pass DTMF numbers. It is to be understood that in other embodiments the above sequence may be changed, and ..., 叩, the DTMF number is transmitted in the frequency band as the last option. In different embodiments, the terminal can also use different DTMF digital transmission methods. The speech terminal 100 has a keyboard 102 with a plurality of numeric keys that can generate DTMF digits. The control unit 16 is used to control the operation of the units in the system, and the communication unit 17 is used to transmit or receive signals or media data. In the system 101, the detector 15 is configured to detect the DTMF digital transmission mode of the receiving end with the calling terminal. The detector 15 can be queried by the communication unit 17 to issue an INVITE or OPTIONS request, and a transmission mode is determined from the response of the request. The encoders 1M4 respectively encode the DTMF digits generated by the pressed numeric keys on the keyboard 102 in correspondence with the first to fourth transfer modes described above, and are then transmitted by the communication unit π in a corresponding manner. Encoders 11 and 12 will generate DTMF digits in the SIP signal format; encoder 13 digitally encodes DTMF into out-of-band messages; encoder 14 digitally encodes DTMF into poor audio (eg, Real Time Transport Protocol (RTP) ) the data stream of the agreement). It should be understood that other input devices (e.g., voice control devices or touch devices) may be used to generate dial-up signals or DTMF digits in place of keyboard 102. Referring to Figure 2, a flow chart of the method of agreement for dual-tone multi-frequency (DTMF) digital transmission is illustrated. The originating terminal 100 establishes a call by SIP protocol. First, the originating terminal 100 issues an INVITE request to the terminating end 120 to start a call (step S2)' and waits for a response (step 4).

Client's Docket No.: TT^ Docket No: 0695-A40807twf.doc/Joseph/2005-12-20 8 200803356. The caller 10〇 can query the DTMF number sub-delivery mode supported by the receiver 120 in different ways. For example, when the receiving terminal 〇2〇 answers the above INVITE request of the calling terminal 100, the message of the ssi〇n description protocol (SDP) is repeated to the receiving terminal 12 to support the third transmission. the way. Therefore, the above request is the inquiry mode corresponding to the second delivery mode. The caller can request the receiver 12 to support the delivery of the DTMF digits in the first and second delivery modes described above by the IMPONS request of the SIp protocol. From this, it can be seen that the originating terminal 100 can inquire the DTMF digital transmission mode supported by the receiving terminal 120 by the inquiry method corresponding to each of the above-mentioned plural transmission methods supported by the transmitting terminal 100. Some communication systems require the endpoint to enter DTMF digits during the ringing phase before replying to 200, while others respond after 2 replies. The originating terminal 100 is required to interrogate one or more dual-tone multi-frequency digital transmission modes supported by the receiving terminal 120 before the received terminal 120 requests the input of the DTMF digit. Therefore, when a speech is received, a temporary response (for example, a response such as status code 180 or 183) is received, and the above-mentioned OPTIONS request is started to query one or more types supported by the terminal 12〇. Dual multi-frequency digital transmission. When the utterance terminal 100 waits for a response, if a response such as a status code of 180, 183, or 2 is received, the replies are stored (step S6), and the detector 15 transmits an OPTIONS request to the receiver 120 through the communication unit 17, thereby inquiring Whether the receiving end 120 supports the first and second transfer modes described above (step S8). The caller 1〇〇 receives and stores the reply after requesting 〇pTI〇NS request

Client’s Docket No·: TT?s Docket No: 0695-A40807twf.doc/Joseph/2005-12-20 9 200803356 Overlay (step SH)). The calling party can judge the receiving end 12 180 183 and the sending mode at the same time as receiving the 200. The two kinds of DTMF hair detectors 15 of the ancient branch brothers are based on the above-mentioned plural number. The number of the milknets supported by the receiver 12G is 2 = first, and the test is crying 5 insects I g | Whether the first N and the 5th end 12〇 support the dual-voice multi-frequency number by the call initiation protocol. Fine = Whether the response to the above 0PTI0NS request contains the string ': two appliCati〇n/dtmf_relay' to list whether the receiver 12〇 is P' or not (step S12). If the sentence will be 蛊gi|#" When the substring is included, the detector 15 accepts the terminal 12Q to support the first transmission mode, and encodes the DTMF digit generated by the keyboard 102 by the encoding HU (step S14), and transmits the DTMF digit to the receiving end by the sip signal. 12〇 (step S16). If the string is not included, the detector 15 responds to the request of the 〇pTI〇NS according to the receiving terminal 12〇 whether or not the string is included.

Accept.application/vnd.nortelnetworks.digits" to determine whether the receiving terminal 120 supports the second transmission mode (step S18). If the string is included, the detector 15 determines that the receiving terminal 12 supports the second transmission mode. And encoding, by the encoder 12, the DTMF digits generated by the keyboard 1〇2 (step S20), and transmitting the DTMF digits to the receiving terminal 120 by the SIP signal (step S22). Since the future is likely to have more SIp DTMF formats being used' The receiving end may still be rendered in the response format of Accept: application/.. The above two strings are not included in the reply of the above OPTIONS request.

When the client's Docket No.: TT's Docket No: 0695-A40807twf.doc/Joseph/2005-12-20 10 200803356, the detector 15 determines that the receiving terminal 120 does not support transmitting the dual-multiple frequency ^ by the SIP signal, and then discriminates the receiving terminal 12 . Whether or not the above-described third delivery mode is supported is to transmit DTMF digits by out-of-band (out-0fLband) signal (step S24). If so, the utterance terminal 1 encodes the DTMF digit by the encoder 13 (step S26)' and transmits the DTMF digit to the receiver terminal 12 by the out-of-band signal (step S28). When the receiver terminal 120 does not support the third transmission mode described above. When the double-band multi-frequency digital is transmitted by the out-of-band signal, the transmitting terminal 1 encodes the DTMF number by the encoder 14 (step S30), and transmits the DTMF digit to the receiving end i2〇 in the in-band (in_band) signal ( Step S32). Steps S12, S18 and S24 are used to determine a delivery mode for transmitting DTMF digits to the receiving terminal 12A. The caller then encodes and passes the DTMF digits in a determined manner. It is the last option to pass the DTmf number in the in-band signal, and the order of the other signals transmitted by the SIP signal or the out-of-band signal can be adjusted. Although the above description is only taking one detection sequence as an example, in some other embodiments, only some of the steps in the above embodiments may be used. For example, if the check does not support SIP, the DTMF is transmitted directly in the in-band (in_band) signal. Alternatively, first check the way in which the DTMF digits are transmitted by the out-of-band (〇ut_〇f_band) signal. If the SIp signal is checked after failure, the DTMF is transmitted in the in-band signal mode after the failure. It is important to understand that INVITE and options are requests that the SIP device must support. Thus, current SIP devices can implement the above methods to utilize requests in these SIP protocols to interrogate or respond to DTMF digits delivery without the need for additional communication protocols.

Client's Docket No.: TT^ Docket No: 0695-A40807twf.doc/Joseph/2005-12-20 11 200803356 H In the end, the caller 10 asks the receiver 120 with an invite request. 支援 No support for the box & Ml.. The shoulder-W signal transmits the dual-multi-frequency digital, so please use the above OPTIONS. Double 亍 i ητλΛΐ7 slave ~ owe to ask whether the party 12 〇 supports the transmission of SIP signals ^ 〇 〇 〇 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照 依照限定=发发: The month has been disclosed in the preferred embodiment as above, but within the scope and scope of the present invention, the present invention can be modified and retouched without departing from the spirit of the present invention, and thus the protection of the present invention. The definition of the patent application scope of Tian Heyi is subject to change. [Simple diagram of the diagram] f diagram shows the structure block diagram of the embodiment of the utterance; and Fig. 2 shows the agreement method of the DTMF digital transmission method [main component payment 5 tiger description] one 丨1·14 ~ Encoder; 15 ~ detector; 16 ~ control unit; 17 ~ communication unit '100 declarative end, 101 ~ agreement system; 102 ~ keyboard; 120 ~ receiver.

Client5s Docket No.: TT^ Docket No: 0695-A40807twf.doc/Joseph/2005-12-20 12

Claims (1)

200803356 X. Patent application scope: ι—Double-sound multi-frequency (DTM delivery method, implemented in a single transmission every ☆ mountain u, +, and private, the above-mentioned speech terminal supports the multi-frequency transmission of dual-multi-frequency digital, And each delivery mode corresponds to a priority order, comprising: the above-mentioned utterer sends a first request to start a call; the mountain before the spoofed end requests to turn in the dual-multiple-frequency signal, the above utterance:: ask the above-mentioned receiver One or more types of dual-multiple-frequency sub-transmissions supported; - the above-mentioned priority order of the above-mentioned plural transfer mode to determine a dual-multiple turtle transfer mode supported by the above-mentioned receiver; and = the decision of the upper pass is determined Mode transmission - dual frequency to the above-mentioned receiver. The dual-voice multi-frequency (DTMF) digital protocol method described in Item 1 of the patent is divided into the first request conforming to the call initiation protocol (SIP), and further includes: the calling end The answering method corresponding to the mother-to-person of the above-mentioned plural transfer method supported by the above-mentioned utterance end is _ the above-mentioned receiving end. 3 · If the patent application scope is 2 ^ ^ ★ The protocol for the dual-audio multi-frequency (DTMF) digital transmission method described in item 2, further includes the above-mentioned utterance end discriminating whether the speech terminal supports the transmission of dual-multi-frequency digital signals by the call initiation protocol (SIP) signal. When the above-mentioned receiving end supports the transmission of the dual-multi-frequency digital signal by the Tang 兮 m Talk Protocol (SIP) signal, the utterance end transmits the dual-multi-frequency digital number from the call initiation protocol (sIP) signal at t 4 %; Client's Docket No ·: TT's Docket No: 0695-A40807twf.doc/Joseph/2005-12-20 13 200803356 Μ The above-mentioned receiver does not support the transmission of dual-voice multi-frequency numbers by the call initiation sip (sip) signal, and it is determined whether the above-mentioned receiver supports To transmit dual-multi-frequency digital signals by out-of-band signals; when the above-mentioned live end supports the transmission of dual-multi-frequency digital signals by out-of-band signals, the above-mentioned speech terminals are out of band (out - 〇f_band) signal transmitting dual-multi-frequency digital; and when the above-mentioned receiving end does not support the transmission of dual-multi-frequency digital signals by out-of-band (〇ut_of seven and) signals, the utterance end transmits the double sound in the in-band (in_band) signal Multi-frequency digital. 4. A method for agreeing to a dual-tone multi-frequency (Dtmf) digital transmission method according to claim 3, wherein the above-mentioned caller interrogates the above-mentioned call with one of the call initiation protocol (SIP) OPTIONS requests. Whether the terminal supports the transmission of the dual-voice multi-frequency digital by the call initiation protocol (SIP) signal. 5. The agreement method of the dual-audio multi-frequency (DTMF) digital transmission method according to claim 4, wherein if the above-mentioned receiver pair When the reply of the above OPTIONS request includes "Accept: application/dtmf-relay" or "Accept: application/vnd.nortelnetworks.digits", the above-mentioned caller determines that the above-mentioned call end support transmits the double call by the call initiation protocol (SIP) signal. Multi-frequency numbers. 6. The method for agreeing to a dual-audio multi-frequency (DTMF) digital transmission method according to claim 4, wherein: the uttering end uses the first request to inquire whether the receiving end supports out-of-band (out-of- Band) The signal passes the dual-multi-frequency digital, wherein the above Client's Docket No.: TT5s Docket No: 0695-A40807twf.doc/J〇seph/2005-12-20 14 200803356 The first request is the INVite of the Call Initiation Protocol (SIP) request. 7. The agreement method of the dual-audio multi-frequency 1 top-of-the-line digital transmission method according to item 4 of the patent application scope of the invention, wherein the above-mentioned utterer receives a temporary reply (pr〇vlsl〇nai response) The pti〇ns request to ask for the above-mentioned received series support or more than one type of light frequency digital transmission. 8. The method for applying the two-voice (four) 1·) digital transmission method according to item 7 of the patent application, wherein 'the above-mentioned utterer receives the state shiema (10)', and asks the above-mentioned QPTIQNS request for one or the kind supported by the above-mentioned receiver The above dual-tone multi-frequency digital transmission method. 9. The method for agreeing to the dual-sound multi-frequency ρτ transmission method according to claim 7, wherein when the utterer receives the m, the OPITONS request is used to query the one or more dual-multiple frequencies supported by the receiver. Digital delivery method. Path 10: The dual-voice multi-frequency method (the D-word transfer method of the method of the fourth paragraph of the patent application scope), wherein the above-mentioned utterer receives the reply-requested temple, and the above-mentioned 0PTI0NS request is supported by the second-end terminal. One or more dual-voice multi-frequency digital transmissions = η.---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- The delivery mode corresponds to a priority order, and includes: a transfer complex encoder 'for respectively performing the above-mentioned complex transfer party, encoding; and one of the children's debt detectors, when the above-mentioned caller issues a first request to start a client^Docket No .: TT^ Docket No: 0695-A40807twf.doc/Joseph/2005-12-20 15 200803356 After the call, the caller is asked to turn into a double cool and ask the above-mentioned receiver to support a kind of Ge Er Er Shi signal In the past, in the above-mentioned priority order, the above-mentioned priority order supported by the above-mentioned receiving terminal is used to determine the control unit according to the above-mentioned priority transfer party=above dual-multi-frequency digital transmission. And the transmission mode; a pair of dual-frequency multi-frequency digital coding; and one of the hand-coded one-computing communication unit, and the double-voice multi-frequency number of the above-mentioned determined code to the above-mentioned receiving end. An agreement system for applying the patented range u-character transfer method, wherein the above-mentioned t-voice multi-frequency (DTMF) number protocol (SIP), the above-mentioned detectors meet the inquiry mode of each of the call initiation modes : Supporting the above-mentioned plural transfer 13. As mentioned in the 12th paragraph of the patent application, the 3 receiving end of the patent. The word transfer party red tm its towel, and the t-money (DTMF) number end supports the call initiation agreement (SIP ^ ☆ discriminate between the above words, if yes, the communication unit transmits the dual-f-frequency dual-multi-frequency digital number by (4)), when the above-mentioned receiving end does not support ^ ((SIP)§fl#u transmits the signal to transmit the dual-multi-frequency digital The above-mentioned spoofing protocol (SIP) determines whether the above-mentioned receiving end supports the transmission of dual-multi-frequency digital signals by out-of-band (out_〇f-band) signals, and if so, the above-mentioned communication unit is out-of-band (out_of_band) Signal The dual-voice multi-frequency digital is transmitted, and when the above-mentioned receiving end does not support the transmission of the dual-multi-frequency digital signal by the out-of-band signal, the communication unit transmits the dual-multi-frequency digital signal by the in-band signal. Patent application scope 苐13 double-voice multi-frequency (dtmF) number Client's Docket No.: TT5s Docket No: 0695-A40807twf.doc/Joseph/2005-12-20 16 200803356 • Word transfer mode agreement system, wherein The above-mentioned detector uses one of the call initiation protocol (SIP) OPTIONS requests to inquire whether the above-mentioned receiver supports the transmission of the dual-multiple digital number by the call initiation protocol (SIP) signal. 15. The agreement system of the dual-audio multi-frequency (DTMF) digital transmission method according to claim 14, wherein if the above-mentioned receiving end responds to the OPTIONS request, "Accept: application/dtmf-relay" or In the case of "Accept: application/vnd. nortelnetworks.digits", the above-mentioned detected person discriminates that the above-mentioned receiver supports the transmission of the dual-multiple digital number by the call initiation protocol (SIP) signal. 16. The agreement system of the dual-audio multi-frequency (DTMF) digital transmission method according to claim 14, wherein the debt detector queries, by the first request, whether the receiving end supports double-talking by an out-of-band signal. The multi-frequency number 'where the first request is an INVITE request for a call initiation protocol (SIP). 17. The protocol system of dual-audio multi-frequency (dtmF) digital transmission method according to claim 14, wherein when the communication unit receives a provisional response, the detector starts to request by the OPTIONS. To inquire about the above-mentioned receivers or more than one type of dual-multi-frequency digital transmission. 18. The agreement system of the dual-audio multi-frequency (dtmf) digital transmission method as described in the claim 17 of the patent scope, wherein the above-mentioned communication unit receives the status code 180-day defensive, and the above-mentioned debt-receiving person requests the above-mentioned received message with the above-mentioned OPtiqns request. One or more dual-multi-frequency digital transmission methods supported by ^&. Client's Docket No.: TT's Docket No: 0695-A40807twf.doc/Joseph/2005-12-20 17 200803356 • 19. A protocol system for dual-audio multi-frequency (DTMF) digital transmission as described in claim 17 of the patent application, When the communication unit receives the status code 183, the detector requests the one or more dual-multi-frequency digital transmission modes supported by the receiving end by using the OPTIONS request. 20. The agreement system of the dual-audio multi-frequency (DTMF) digital transmission method according to claim 14, wherein when the communication unit receives the response 200 of the first request, the detector requests the above OPTIONS request One or more dual-tone multi-frequency digital transmission modes supported by the above-mentioned receiving end. Client’s Docket No.: TT5s Docket No: 0695-A40807twf.doc/Joseph/2005-12-20