WO2007109950A1

WO2007109950A1 - A method and system for realizing speech interaction

Info

Publication number: WO2007109950A1
Application number: PCT/CN2007/000188
Authority: WO
Inventors: Santosh Nath
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-03-27
Filing date: 2007-01-18
Publication date: 2007-10-04
Also published as: CN100486282C; CN1859506A

Abstract

A method for realizing speech interaction, comprise: the media resource server MRS receives the Invite message transmitted from the user terminal, the said Invite message carries the user terminal SDP information; the said MRS feeds back a ringing message to the user terminal, the said ringing message carries MRS SDP information; the said user terminal and MRS establish real-time transmission protocol RTP media channel according to the interactive SDP information of both sides, and make speech interaction through the said established RTP media channel. A system for realizing speech interaction is also provided. Above-mentioned method and system can establish RTP media channel in advance, avoid that the network service provider collects fee to speech interactive process between the user terminal and MRS, thereby reduces the operating cost of the service provider.

Description

Method and system for realizing voice interaction

Technical field

The present invention relates to Next Generation Network (NGN) technology, and in particular, to a method and system for implementing voice interaction in an NGN. Background of the invention

The Session Initial Protocol (SIP) is an application control (signaling) protocol proposed by the Internet Engineering Task Force (IETF ₇ ). As its name implies, SIP is mainly used to initiate a session. . Specifically, SIP can be used to create, modify, and terminate multimedia session sessions attended by multiple participants. It is one of the core protocols of NGN.

The session refers to an application level association relationship between two SIP nodes. The SIP node can be a User Agent (UA), a SIP Agent, a registration server, a back-to-back agent, a location server, and the like. The end-to-end user agent can be generally referred to as an application server (AS, Application Server). The application server belongs to a service provider, and is mainly used to provide various value-added services for end users.

In the NGN in order to achieve support for centralized playback, digit collection, conferences and other media resources in a normal call and intelligent call, the introduction of the Media Resource Server (MRS, Media Resource Server) ₀ can be achieved, such as inserted by MRS, send Notifications (PA, Play Announcement), as well as voice communication functions such as PAC, Play Announcement and Collect Digits

In the smart call, the MRS and the user terminal perform voice interaction by establishing a real-time transport protocol (RTP) media channel. In order to establish an RTP media channel between the user terminal and the MHS, the user terminal acting as the calling party needs to set itself up. Device capability information, such as voice capabilities, image capabilities, etc., and RTP media channel Internet Protocol (IP) address and port address information are loaded into the Session Description Protocol (SDP) package, and SDP The packet is sent to the MRS as the called party as the content of the SIP message. Similarly, the MRS as the called party also needs to load device capability information such as voice capability and video capability, and the IP address and port address information of the RTP media channel into the SDP packet, and send it as the content of the SIP message to the master. Call the user terminal of the party to negotiate. The user terminal and the MRS establish the RTP media channel according to the negotiation result. According to the provisions of the SIP protocol, the calling party may carry its own SDP packet in an Invite message or an ACK message sent to the MRS, and the called party may carry its own SDP packet in the ringback returned to the user terminal. 180 Ringing or 200 OK message.

Then, the MRS provides a voice interaction function to the user terminal through the established RTP media channel, for example, starting to play a recording notification or collecting the number dialed by the user while playing the recording notification, that is, performing a PA or PAC operation;

After completing the voice interaction function, the MRS submits the collected user data to the AS using a Session Initiation Protocol Information Message (SIP INPO) or a Hypertext Transfer Protocol Acquisition Message (HTTP GET).

Afterwards, the AS may also send the next voice interaction request to the MRS. At this time, the MRS completes the requested voice interaction with the user terminal through the established RTP media channel.

After the AS obtains sufficient user data, it instructs the MRS to tear down the RTP media channel established with the user terminal.

In this way, through the voice interaction function described above, the AS can obtain sufficient user data, and will provide the requested intelligent service to the user according to the obtained user data. For example, for a prepaid smart call, after the AS obtains the card number, password, and called user number of the prepaid user through the voice interaction process between the MRS and the user terminal, the AS obtains the The obtained called user number routes the smart call to the called party, and at the same time, after the call ends, the call is charged according to the card number and password of the prepaid user.

In the above process, when the RTP media channel is established between the user terminal and the MRS, and the voice interaction process is performed by using the established RTP media channel, the network operator is occupied by the RTP media channel. A fee will usually be required for a service provider that provides intelligent services. Generally, in the existing intelligent call flow, after the called party sends a 200 OK message to the calling party to indicate its own response, the network operator will start charging the current call. However, for the smart call described above, the service provider should only charge the user when the user enjoys the smart service, and the user should not be charged during the establishment of the smart call. For example, for a prepaid smart service, in a smart call where the prepaid user acts as the calling party, the service provider should only charge the prepaid user for the fee during the period between the user and the called party, and should not charge the prepaid fee. The card number, password, and the fee during the collection period of the called number are performed during the voice interaction function between the prepaid user and the MRS during the call. Therefore, in this case, the service provider itself needs to pay the network operator for the network resources occupied by the voice interaction between the user terminal and the MRS, which will greatly increase the service cost of the service provider. . Summary of the invention

The embodiment of the invention provides a method for implementing a voice interaction function, so that the network operator does not charge the service provider for the network resources occupied by the user terminal and the MRS during the voice call process, thereby saving The operating cost of the service provider.

The method for implementing voice interaction in the embodiment of the present invention includes:

The media resource server MRS receives the invitation message sent by the user terminal, where the invitation message carries the session description protocol SDP information of the user terminal;

Returning, by the MRS, a ringing message to the user terminal, where the ringing message is carried SDP information of MRS;

The user terminal and the MRS establish a real-time transport protocol RTP media channel according to the SDP information exchanged by the two parties, and perform voice interaction through the RTP media channel.

Another embodiment of the present invention provides a system for implementing voice interaction, including: a user terminal and a media resource server MBS; wherein:

The user terminal sends an invitation message to the MRS, and carries the session description protocol SDP information of the user terminal in the invitation message, and receives the ringing message returned by the MRS according to the invitation message, and obtains the ringing message to be carried in the ringing message. The SDP information of the MRS establishes a real-time transmission protocol RTP media channel according to the SDP information of the two parties and performs voice interaction through the established RTP media channel.

It can be seen that in the method and system for implementing the voice interaction function in the embodiment of the present invention, the device capability negotiation is performed between the user terminal and the MRS through the Invite message and the ringing message, so that the RTP media channel can be established in advance and realized. The stream of information interaction processes.

In addition, in the method and system of the embodiment of the present invention, since the MRS does not return a 200 OK message before the RTP media channel is established between the user terminal and the MRS, the network operator will not perform the subsequent voice interaction process. Charges are made to reduce the operating costs of the service provider.

Further, by adopting the method and system provided by the present invention, the network operator can decide to adopt different charging policies according to the actual situation of the intelligent service: The charging can be started immediately after the calling user dials the access code of the intelligent service. After the smart call is actually established (for example, the AS returns a 200 OK message to the calling user), the charging is started, so that the calling user can dial some intelligent service access codes without charging, and dialing Some smart service codes are charged. For example: Service 200 is a free intelligent access code, and 17930 is a charging intelligent access code. BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a message flow diagram of implementing the voice interaction function according to a preferred embodiment of the present invention. Mode for carrying out the invention

In order to make the technical solutions and advantages of the invention more apparent, the invention will be further described in detail below with reference to the accompanying drawings.

Considering that in the existing intelligent call process, when the called party sends a 200 OK message response, the network operator starts charging for the current call. Therefore, in order to prevent the network operator from performing voice interaction with the user terminal and the MRS. The network resources occupied by the time are charged, and the message flow for implementing the voice interaction process in the existing intelligent call can be improved.

The specific message flow for implementing voice interaction between the MRS and the user terminal according to the preferred embodiment of the present invention is as shown in FIG. 1 , which mainly includes:

101. After the user dials the smart call number through the user terminal A, the user terminal A sends an Invite message requesting the network to provide the smart service corresponding to the smart call number, and the Invite message is then routed to the AS responsible for processing the smart call.

In this step, the user terminal A as the calling party needs to load its own device capability information, such as voice capability, video capability, etc., and the IP address and port address information of the RTP media channel into the SDP package, and the The SDP packet is carried in the Invite message and sent to the MRS as the called party.

102. After the AS analyzes that the requested intelligent service needs to use a voice interaction function such as PA/PAC, forward the Invite message to an MRS that provides a voice interaction function.

103. The MRS sends a 180 Ringing message to the AS, indicating that the MRS is ready to provide the required voice interaction function.

In this step, the MRS as the called party needs to have its own device capability information, for example. For example, the voice capability, the video capability, and the like, and the IP address and port address information of the RTP media channel are loaded into the SDP packet, and the SDP packet is carried in the 180 Ringing message and sent to the user terminal A as the calling party. .

104. The AS forwards the received 180 Ringing message to the user terminal A. Through the above step 201 204, the user equipment A and the MRS complete the negotiation of the device capabilities between the two.

105. The user terminal A and the MRS establish an RTP media channel according to the negotiation result of the device capability.

106. The MRS provides a voice interaction function to the user terminal A through the established RTP media channel.

The voice interaction function includes: PA or PAC operation, for example, starting to play a recording notification or collecting the number dialed by the user while playing the recording notification.

107. After completing a voice interaction function, the MRS submits the collected user data to the AS by using a SIP INFO or an HTTP GET message.

If the AS requests the next voice interaction process during the call, the AS can use the SIP INFO or HTTP GET message to send the next voice interaction request to the MRS through Piggybacking. In this way, after receiving the new voice interaction request, the MRS returns to the above step 206 to perform the next voice interaction process with the user terminal A through the established RTP connection.

108. After the AS obtains sufficient user data, instruct the MRS to tear down the RTP media channel established with the user terminal A.

In this way, after the AS obtains sufficient user data through the one or more voice interaction processes described above, the requested smart service will be provided to the user terminal A. For example, for a prepaid smart call, after the AS obtains the card number, password, and called user number of the prepaid user through the voice interaction process between the MRS and the user terminal, the AS will The obtained called user number routes the current smart call to the called party, and after the call ends, the card will be deducted according to the card number and password of the prepaid user, and the main account is deducted during the call. The cost of calling the user.

As shown in the foregoing message flow function for establishing the voice interaction function, in the method for implementing the voice interaction function in the embodiment, the user terminal A sends the device capability information to the MRS through the Invite message, and the MRS needs to The device capability information is sent to the user terminal A through the 180 Ringing message, and the MRS and the user terminal do not need to exchange the 200 OK message and the ACK message, so that the device capability information interaction between the user terminal A and the MRS can be implemented earlier, thereby implementing the RTP media channel. The establishment of the advancement, the realization of the information exchange process.

In addition, in the method in this embodiment, the MRS does not send the 200 OK message after sending the 180 Ringing message, and the user terminal A completes the RTP media channel directly with the MRS after receiving the 180 Ringing message from the MRS. Established without waiting for a 200 OK message from the MRS. Therefore, in the process of establishing the RTP media channel between the user terminal A and the MRS, the 200 OK message will not appear, so that the network operator will not be able to charge the network resources occupied by the voice interaction process, thereby reducing the service. Carrier's overhead.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims

Claim

A method for implementing voice interaction, the method includes: a media resource server v, the RS receiving an invitation message sent by the user terminal, where the invitation message carries a session description protocol SDP information of the user terminal;

The MRS returns a ringing message to the user terminal, where the ringing message carries the SDP information of the MRS:

The user terminal and the MRS establish a real-time transport protocol RTP media channel according to the SDP information of the silent party interaction, and perform voice interaction through the RTP media channel.

2. The method of claim 1, wherein the method further comprises: the MRS collecting user data, and submitting the collected user data to the application server AS.

The method according to claim 2, wherein the method further comprises: the AS providing the requested intelligent service to the user terminal according to the collected user data. :'

The method according to claim 1, wherein the SDP information comprises: device capability information and corresponding port information, and an internet protocol address of the RTP media channel.

The method according to claim 4, wherein the device capability information comprises: voice signal information and image capability information of the device.

The method according to claim 1 or 2, wherein the voice interaction is a broadcast notification or a broadcast notification and collects a number.

7. A system for implementing voice interaction, comprising: a user terminal and a media resource server MBS; wherein:

The user terminal sends an invite message to the MRS, and carries the session description protocol SDP information of the user terminal in the invite message, and receives the MRS and returns the invitation message. The ringing message obtains the SDP information of the MRS carried in the ringing message, establishes a real-time transmission protocol RTP media channel according to the SDP information of the two parties, and performs voice interaction through the established RTP media channel.

The system according to claim 7, further comprising an application server AS, wherein the AS is configured to receive the session initiation protocol information message SIP INK or the hypertext transfer protocol after the MRS completes the voice interaction. Get the user data that the message HTTP GET will collect;

And providing the requested intelligent service to the user terminal based on user data from the MRS.

The system according to claim 7, wherein the SDP information comprises: device capability information and corresponding port information, and an internet protocol address of the RTP media channel.

10. The system according to claim 9, wherein the device capability information comprises: voice capability information and image capability information of the device.