CN113905023A - Outbound system and method based on webpage instant messaging technology - Google Patents

Outbound system and method based on webpage instant messaging technology Download PDF

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Publication number
CN113905023A
CN113905023A CN202110982226.6A CN202110982226A CN113905023A CN 113905023 A CN113905023 A CN 113905023A CN 202110982226 A CN202110982226 A CN 202110982226A CN 113905023 A CN113905023 A CN 113905023A
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China
Prior art keywords
outbound
webrtc
request
session
cti server
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CN202110982226.6A
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CN113905023B (en
Inventor
陈玉
安海波
韩娜
孙志超
马怀智
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Seashell Housing Beijing Technology Co Ltd
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Beijing Fangjianghu Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/04—Real-time or near real-time messaging, e.g. instant messaging [IM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/80—Responding to QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]

Abstract

The invention provides an outbound system and method based on a webpage instant messaging technology.A WebRTC terminal initiates an outbound request; the WebRTC session boundary controller carries out session initial protocol conversion and then forwards the session initial protocol conversion to the CTI server; sending to the docked public switched telephone network via the PSTN session border controller to initiate a call according to the number of the called terminal. The outbound system and the method based on the webpage instant messaging technology can realize real-time communication through the browser without using any plug-in or client software, and get through with the set CTI, have the capability of PSTN interaction, greatly improve the use scene of calling of a calling center at any time and any place, and simultaneously ensure the centralized management and control of the calling; the support to the WEB client in the outbound service is realized, and the large-scale expansion is favorably realized.

Description

Outbound system and method based on webpage instant messaging technology
Technical Field
The embodiment of the invention relates to an outbound system and method based on a webpage instant messaging technology.
Background
The existing outbound platform solution is based on the SIP signaling protocol, and the client is implemented by using a hard phone or a desktop soft phone. In the existing outbound platform, a client side depends on a hard phone or desktop software, cannot support a Web client side, and has requirements on the environment; the client-side software needs to be installed in a desktop software-dependent mode, and large-scale expansion cannot be achieved due to the problem of system compatibility. The client side adopts a hard phone mode, and the problem that large-scale expansion cannot be realized due to service support limitation exists.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an outbound system and method based on a webpage instant messaging technology.
The invention provides an outbound call system based on a web instant messaging technology (WebRTC), which comprises a WebRTC terminal, a WebRTC session boundary controller, a Computer Telephony Integration (CTI) server and a Public Switched Telephone Network (PSTN) session boundary controller, wherein the WebRTC terminal is connected with the WebRTC session boundary controller through a network; wherein: the WebRTC terminal is used for initiating an outbound request to the WebRTC session boundary controller; wherein, the outbound request comprises the number of the called terminal; the WebRTC session boundary controller is used for receiving the outbound request, performing session initial protocol conversion on the outbound request and then forwarding the outbound request to the CTI server; the CTI server is used for receiving the outbound request and sending the outbound request to the PSTN session boundary controller; the PSTN session boundary controller is used for receiving the outbound request and sending the outbound request to a butted public switched telephone network so that the public switched telephone network initiates a call to the called terminal according to the number of the called terminal.
According to the outbound system based on the webpage instant messaging technology, the system further comprises an authentication server; before the WebRTC terminal is configured to initiate an outbound request to the WebRTC session border controller, the WebRTC terminal is further configured to: sending a registration request to the WebRTC session boundary controller; the WebRTC session boundary controller is also used for receiving the registration request and sending the registration request to a CTI server; the CTI server is also used for receiving the registration request and sending the registration request to the authentication server; the authentication server is used for receiving the registration request and performing registration operation; and the registration operation comprises the steps of distributing an outbound number for the WebRTC terminal and sending the outbound number to the WebRTC terminal.
According to the outbound system based on the web page instant messaging technology provided by the invention, when the WebRTC session boundary controller is used for sending the registration request to the CTI server, the WebRTC session boundary controller is specifically used for: and acquiring a corresponding CTI server based on the IP address of the WebRTC terminal, and sending the registration request to the corresponding CTI server.
According to the outbound system based on the webpage instant messaging technology, the outbound request comprises the outbound number; the CTI server, prior to being configured to send the outbound request to the PSTN session border controller, is further configured to: acquiring an outbound available line bound by the WebRTC terminal according to the outbound number, and updating the outbound request according to the outbound available line; when the PSTN session border controller is configured to send the outbound request to the docked public switched telephone network, the PSTN session border controller is specifically configured to: and sending the outbound request to a butted public switched telephone network according to the outbound available line.
According to the outbound system based on the webpage instant messaging technology provided by the invention, after the CTI server is used for sending the outbound request to the PSTN session boundary controller, the CTI server is also used for: storing call related records and/or recording calls.
According to the outbound system based on the web page instant messaging technology provided by the invention, when the WebRTC session boundary controller is used for forwarding the outbound request to the CTI server after session initial protocol conversion, the WebRTC session boundary controller is specifically used for: and acquiring a corresponding CTI server based on the IP address of the WebRTC terminal, and sending the outbound request to the corresponding CTI server after session initial protocol conversion.
According to the outbound call system based on the webpage instant messaging technology, after the called terminal answers the call and before the call is finished, media streams are formed among the called terminal, the public switched telephone network, the PSTN session boundary controller, the CTI server, the WebRTC session boundary controller and the WebRTC terminal.
According to the outbound system based on the webpage instant messaging technology, after the media stream passes through the PSTN session boundary controller and the CTI server and reaches the WebRTC session boundary controller, the WebRTC session boundary controller is also used for carrying out voice code conversion on voice signals in the media stream.
According to the outbound system based on the web page instant messaging technology provided by the invention, when the WebRTC session boundary controller is used for performing voice transcoding on a voice signal in a media stream, the WebRTC session boundary controller is specifically used for: the speech signal in the media stream is converted by the telephone's G711/g.729 coding into Opus coding.
The invention also provides an outbound method based on the web instant messaging technology (WebRTC), which comprises the following steps: the WebRTC terminal initiates an outbound request to a WebRTC session boundary controller; the WebRTC session boundary controller receives the outbound request, performs session initial protocol conversion on the outbound request and then forwards the outbound request to a Computer Telephony Integration (CTI) server; the CTI server receives the outbound request and sends the outbound request to a Public Switched Telephone Network (PSTN) session boundary controller; and the PSTN session boundary controller receives the outbound request and sends the outbound request to a butted public switched telephone network so that the public switched telephone network initiates a call to the called terminal according to the number of the called terminal.
According to the outbound system and method based on the webpage instant messaging technology, the WebRTC terminal is used for initiating the outbound request, real-time communication can be realized through the browser without using any plug-in or client software, the real-time communication can be communicated with the set CTI, the PSTN interaction capability is realized, the use scene of calling of a calling center at any time and any place is greatly improved, and meanwhile, the centralized management and control of the calling are ensured; the support to the WEB client in the outbound service is realized, and the large-scale expansion is favorably realized.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an outbound system based on the instant messaging technology of web pages according to the present invention;
FIG. 2 is a second schematic structural diagram of the outbound system based on the instant messaging web page technology according to the present invention;
FIG. 3 is a schematic diagram of the structure and function of the outbound system based on the instant messaging web page technology;
FIG. 4 is a flow chart of the outbound method based on the instant messaging technology of the web page according to the present invention;
FIG. 5 is a schematic view of a processing flow of a registration request in an outbound method based on the instant messaging web page technology according to the present invention;
fig. 6 is a schematic view of a processing flow of an outbound request in the outbound method based on the web page instant messaging technology provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The calling-out system and method based on the webpage instant messaging technology of the invention are described below with reference to fig. 1-6.
Fig. 1 is a schematic structural diagram of an outbound system based on the web page instant messaging technology provided by the invention. As shown in fig. 1, the system includes: WebRTC (Web Real Time Communication) terminal 1, WebRTC session border controller 2, CTI (Computer telephony Integration) server 3, PSTN (Public Switched Telephone Network) session border controller 4, where: the WebRTC terminal 1 runs in a browser, and the WebRTC terminal 1 is used for initiating an outbound request to the WebRTC session boundary controller 2; wherein, the outbound request comprises the number of the called terminal; the WebRTC session boundary controller 2 is used for receiving the outbound request, performing session initial protocol conversion on the outbound request and then forwarding the outbound request to the CTI server 3; the CTI server 3 is used for receiving the outbound request and sending the outbound request to the PSTN session boundary controller 4; the PSTN session boundary controller 4 is configured to receive the outbound request and send the outbound request to a docked public switched telephone network, so that the public switched telephone network initiates a call to the called terminal according to the number of the called terminal.
The WebRTC terminal 1 is a client that initiates an outbound call. The WebRTC terminal 1 realizes an outbound function based on a WebRTC phone SDK (software development kit) built in a browser, and is compatible with operating systems such as windows, mac, android, ios and the like. CTI server 3 is used to process telephone call related information, and may be improved based on the basic function of a SIP (Session Initiation Protocol) server. The called terminal comprises a mobile phone or a fixed telephone.
The WebRTC terminal 1 initiates an outbound request to the WebRTC session boundary controller 2 based on a WebRTC phone SDK built in a browser; wherein, the outbound request comprises the number of the called terminal. The WebRTC phone SDK is arranged in the browser, and a user can realize real-time communication through the browser without using any plug-in or client software.
The WebRTC session boundary controller 2 is used for receiving the outbound request, converting the outbound request by an SIP protocol and then forwarding the outbound request to the CTI server 3. The WebRTC session border controller 2 needs to perform SIP protocol conversion on the http protocol-based outbound request for the CTI server 3 to perform processing of the telephone call.
The CTI server 3 is used for receiving the outbound request and sending the outbound request to the PSTN session boundary controller 4; the PSTN session border controller 4 is used for receiving the outbound request and sending the outbound request to the butted public switched telephone network, and the public switched telephone network receives the outbound request and initiates a call to the called terminal according to the number of the called terminal.
According to the outbound system based on the webpage instant messaging technology, the WebRTC terminal is used for initiating the outbound request, real-time communication can be realized through the browser without using any plug-in or client software, the outbound system is communicated with the set CTI, the PSTN interaction capacity is achieved, the use scene of calling of a calling center at any time and any place is greatly improved, and meanwhile, centralized management and control of the calling are guaranteed; the support to the WEB client in the outbound service is realized, and the large-scale expansion is favorably realized.
Fig. 2 is a second schematic structural diagram of the outbound system based on the web page instant messaging technology provided by the present invention. According to the outbound system based on the webpage instant messaging technology, the system comprises a WebRTC terminal (web terminal) 1, a WebRTC session boundary controller 2, a CTI server 3, a PSTN session boundary controller 4, a Public Switched Telephone Network (PSTN)5, a called terminal 6 and an authentication server 7; before the WebRTC terminal 1 is configured to initiate an outbound request to the WebRTC session border controller 2, the WebRTC terminal is further configured to: sending a registration request to the WebRTC session boundary controller 2; the WebRTC session border controller 2 is further configured to receive the registration request and send the registration request to the CTI server 3; the CTI server 3 is also used for receiving the registration request and sending the registration request to an authentication server 7; the authentication server 7 is configured to receive the registration request and perform a registration operation; the registration operation includes allocating an outbound number to the WebRTC terminal 1 and sending the outbound number to the WebRTC terminal 1.
In fig. 2, the WebRTC Session Border Controller is simply denoted as WebRTC SBC (Session Border Controller), and the PSTN Session Border Controller is simply denoted as PSTN SBC.
The authentication server 7 is used to issue and authenticate user identity information. The WebRTC terminal 1 can directly communicate with the WebRTC session border controller 2 and the authentication server 7. Before an outgoing call, authentication by the authentication server 7 is first required. The WebRTC terminal 1 sends a registration request to the WebRTC session boundary controller 2, and the WebRTC session boundary controller 2 forwards the registration request to the CTI server 3. If the CTI server 3 obtains that the registration request does not include the token issued by the authentication server 7, the WebRTC session boundary controller 2 returns information that the login is not valid to the WebRTC terminal 1, prompts the WebRTC terminal 1 to log in, and requests the token from the authentication server 7. The WebRTC terminal 1 performs login operation according to the user name and the key obtained in advance, and then sends a token request to the authentication server 7. After receiving the token request, the authentication server 7 inquires the WebRTC terminal 1 to input a correct user name and password, knows that the WebRTC terminal 1 has effectively logged in, and sends the token to the WebRTC terminal 1 through an http protocol. After the WebRTC terminal 1 acquires the token, a registration request carrying the token is sent to the WebRTC session boundary controller 2, the registration request is sent to the CTI server 3 to the WebRTC session boundary controller 2, and the CTI server 3 receives the registration request and sends the registration request to the authentication server 7; the authentication server 7 receives the registration request and performs registration operation; the registration operation includes allocating an outbound number to the WebRTC terminal 1 and transmitting the outbound number to the WebRTC terminal 1. The authentication server 7 can send the outbound number to the WebRTC terminal 1 through the CTI server 3 and the WebRTC session boundary controller 2, thereby realizing authentication of the user side (the WebRTC terminal 1). The CTI server 3 and the WebRTC terminal 1 establish connection and keep heartbeat through the WebRTC session boundary controller 2. If the authentication fails, the authentication server 7 may return information of the authentication failure to the WebRTC terminal 1 through the CTI server 3 and the WebRTC session boundary controller 2.
the token is a string of character strings generated by the authentication server 7 after receiving the information that the WebRTC terminal 1 has effectively logged in (inputting the correct user name and password) to serve as a token requested by the WebRTC terminal 1, after logging in for the first time, the authentication server 7 generates a token to return the token to the WebRTC terminal 1, and then the WebRTC terminal 1 only needs to take the token to request data before, and does not need to take the user name and password again. The token is used for relieving the pressure of the server, reducing frequent query of the database and making the server more robust.
According to the outbound system based on the webpage instant messaging technology, the authentication of the WebRTC terminal is realized by using the authentication server, so that the online user authentication is realized, and the automatic number distribution and centralized control can be realized; the authentication system can realize online linkage, is communicated with unified login, and reduces the workload of operation and maintenance.
According to the outbound system based on the web page instant messaging technology provided by the present invention, when the WebRTC session boundary controller 2 is used to send the registration request to the CTI server 3, it is specifically used to: and acquiring a corresponding CTI server 3 based on the IP address of the WebRTC terminal 1, and sending the registration request to the corresponding CTI server 3.
Load balancing, called Load Balance in english, means that a Load (work task) is balanced and distributed to a plurality of operation units for running, such as an FTP server, a Web server, an enterprise core application server, and other main task servers, so as to cooperatively complete the work task. In the invention, the WebRTC session boundary controller distributes tasks to a plurality of CTI servers for execution, thereby reducing the load of the CTI servers and improving the processing efficiency.
For a certain WebRTC terminal 1 it is possible to communicate with a specific CTI server 3. For example, a mapping relationship between the IP address of the WebRTC terminal 1 and the CTI server 3 may be established, and the corresponding CTI server 3 may be obtained according to the IP address of the WebRTC terminal 1. Or, a mapping relationship between the hash value of the IP address of the WebRTC terminal 1 and the CTI server 3 may be established, the hash value is calculated according to the IP address of the WebRTC terminal 1, and then the corresponding CTI server 3 is acquired according to the hash value of the IP address of the WebRTC terminal 1.
Therefore, when sending the registration request to the CTI server 3, the WebRTC session boundary controller 2 acquires the corresponding CTI server 3 based on the IP address of the WebRTC terminal 1, and sends the registration request to the corresponding CTI server 3, and the corresponding CTI server 3 further performs processing of the registration request.
The outbound system based on the webpage instant messaging technology acquires the corresponding CTI server through the IP address based on the WebRTC terminal, and sends the registration request to the corresponding CTI server, thereby being beneficial to realizing load balance of the CTI server and improving the processing efficiency.
According to the outbound system based on the webpage instant messaging technology, the outbound request comprises the outbound number; before being configured to send the outgoing call request to the PSTN session border controller 4, the CTI server 3 is further configured to: acquiring an outbound available line bound by the WebRTC terminal 1 according to the outbound number, and updating the outbound request according to the outbound available line; the PSTN session border controller 4, when configured to send the outgoing call request to the docked public switched telephone network 5, is specifically configured to: the outbound request is sent to the docked public switched telephone network 5 according to the outbound available line.
The outbound request issued by the WebRTC terminal 1 includes the outbound number assigned by the authentication server 7. When the PSTN session border controller 4 and the public switched telephone network 5 actually initiate an outbound call to the outbound terminal 6, it needs to use a number authorized by the operator, that is, initiate an outbound call through the corresponding outbound line. For simplicity, the outbound number assigned by the authentication server 7 to the WebRTC terminal 1 may be directly a number supported by the PSTN session border controller 4 and the public switched telephone network 5, but then the number distribution by the authentication server 7 is not flexible. Therefore, when number distribution is performed to the WebRTC terminal 1, the authentication server 7 can set and distribute the outbound number according to a rule set by a service requirement or the like. Before sending the outbound request to the PSTN session boundary controller 2, the CTI server 3 acquires the outbound available line bound by the WebRTC terminal 1 according to the outbound number, and updates the outbound request according to the outbound available line. Updating the outbound request according to the outbound available line may be adding the outbound available line to the outbound request, or changing the outbound number in the outbound request to the outbound available line. The available outbound line may be a number supported by an operator, such as a mobile phone number or a landline number. CTI server 3 can set up number management module, carry out the relation storage of calling out number and calling out available line, obtain the available line of corresponding calling out according to calling out the number.
CTI server 3 sends the updated outbound request to PSTN session border controller 4, and PSTN session border controller 4 sends the outbound request to the docked public switched telephone network 5 according to the outbound available line.
According to the outbound system based on the webpage instant messaging technology, the outbound available line bound by the WebRTC terminal is acquired according to the outbound number, and the actual outbound operation is carried out by utilizing the outbound available line, so that the flexible management of the number is realized.
According to the outbound system based on the web page instant messaging technology provided by the invention, after the CTI server 3 is used for sending the outbound request to the PSTN session border controller 4, the CTI server is further used for: storing call related records and/or recording calls.
The CTI server 3 can be provided with a call management module, and after the CTI server 3 sends the outbound request to the PSTN session boundary controller 4, the call management module is started to store the call related record, and can record and store the call. Call related records such as information of the caller and the receiver of the call, call start time, call end time, etc.
The outbound system based on the webpage instant messaging technology effectively realizes call management by storing call related records and/or recording calls.
According to the outbound system based on the web page instant messaging technology provided by the invention, when the WebRTC session boundary controller 2 is used for performing session initial protocol conversion on the outbound request and then forwarding the outbound request to the CTI server 3, the WebRTC session boundary controller is specifically used for: and acquiring a corresponding CTI server 3 based on the IP address of the WebRTC terminal 1, and sending the outbound request to the corresponding CTI server 3 after session initial protocol conversion.
For a certain WebRTC terminal 1 it is possible to communicate with a specific CTI server 3. For example, a mapping relationship between the IP address of the WebRTC terminal 1 and the CTI server 3 may be established, and the corresponding CTI server 3 may be obtained according to the IP address of the WebRTC terminal 1. Or, a mapping relationship between the hash value of the IP address of the WebRTC terminal 1 and the CTI server 3 may be established, the hash value is calculated according to the IP address of the WebRTC terminal 1, and then the corresponding CTI server 3 is acquired according to the hash value of the IP address of the WebRTC terminal 1.
Therefore, when forwarding the outbound request to the CTI server 3 after performing SIP protocol conversion, the WebRTC session boundary controller 2 acquires the corresponding CTI server 3 based on the IP address of the WebRTC terminal 1, and forwards the outbound request to the corresponding CTI server 3 after performing SIP protocol conversion, and the corresponding CTI server 3 further performs processing of the outbound request.
According to the call-out system based on the webpage instant messaging technology, the corresponding CTI server is obtained through the IP address based on the WebRTC terminal, and the call-out request is sent to the corresponding CTI server, so that the load balance of the CTI server is further promoted, and the processing efficiency is improved.
According to the outbound call system based on the webpage instant messaging technology, after the called terminal 6 answers the call and before the call is finished, media streams are formed among the called terminal 6, the public switched telephone network 5, the PSTN session boundary controller 4, the CTI server 3, the WebRTC session boundary controller 2 and the WebRTC terminal 1.
CTI server 3 supports the transmission of media streams, unlike a conventional SIP server that does not support media stream transmission and requires an additional media server. Therefore, after the called terminal 6 answers the call, a media stream is formed among the called terminal 6, the public switched telephone network 5, the PSTN session boundary controller 4, the CTI server 3, the WebRTC session boundary controller 2, and the WebRTC terminal 1. The media stream may be a media stream conveyed by a voice signal, or a media stream conveyed by a video signal, or a media stream conveyed by a voice and video signal.
According to the outbound system based on the webpage instant messaging technology, the CTI server supports the transmission of the media stream, and the media server does not need to be additionally and independently arranged, so that the simplification of equipment is facilitated.
According to the outbound system based on the web page instant messaging technology provided by the invention, after the media stream reaches the WebRTC session boundary controller 2 through the PSTN session boundary controller 4 and the CTI server 3, the WebRTC session boundary controller 2 is also used for performing voice code conversion on a voice signal in the media stream.
In order to improve the call quality of the WEB side (WebRTC terminal 1) better, after the media stream reaches the WebRTC session boundary controller 2 through the PSTN session boundary controller 4 and the CTI server 3, the WebRTC session boundary controller 2 is further configured to perform voice code conversion on a voice signal in the media stream, and then transmit the media stream to the WebRTC terminal 1.
According to the outbound system based on the webpage instant messaging technology, after the media stream passes through the PSTN session boundary controller and the CTI server and reaches the WebRTC session boundary controller, the WebRTC session boundary controller performs voice coding conversion on voice signals in the media stream, and the improvement of the call quality of the WebRTC terminal is facilitated.
According to the outbound system based on the web page instant messaging technology provided by the present invention, when the WebRTC session border controller 2 is used for performing voice transcoding on a voice signal in a media stream, it is specifically used for: the speech signal in the media stream is converted by the telephone's G711/g.729 coding into Opus coding.
The outbound system based on the webpage instant messaging technology provided by the invention has the advantages that the voice signal is converted into the Opus code from the G711/G.729 code of the telephone, the voice quality under low bandwidth is optimized by utilizing the characteristics of the Opus code, and the voice quality requirement of outbound communication is met.
Fig. 3 is a schematic structural and functional diagram of the outbound system based on the web page instant messaging technology provided by the present invention. As shown in fig. 3:
the WebRTC terminal 1 opens an initial page through a Web browser to load a WebRTC SDK and is responsible for communicating with the WebRTC session boundary controller 2 to execute a request. The WebRTC terminal 1 may call a softphone SDK (Software Development Kit) to implement a related function through a WebRTC user at the browser/APP end.
And the WebRTC session boundary controller 2 is responsible for load balancing of the CTI service and conversion of voice coding.
And the CTI server 3 is responsible for initiating, controlling and recording the call instruction.
And the authentication server 7 is responsible for authenticating the identity of the user.
And the number management module (31) and the functional module of the CTI server 3 are responsible for managing number lines.
And the call management module (32) and the functional module of the CTI server 3 are responsible for storing call related records and sound recordings.
A PSTN session border controller 4 responsible for interfacing with the public switched telephone network 5.
A public switched telephone network 5 for initiating an outgoing call to a called terminal 6.
According to the outbound system based on the webpage instant messaging technology, a user performs load balancing through a WebRTC session boundary controller 2 through a WebRTC phone SDK and registers the load balancing to a CTI server 3; when a user initiates an outbound call, an SIP control signaling is forwarded to a CTI server 3 through a WebRTC session boundary controller 2, the CTI server 3 acquires a line resource bound by the user, and executes an outbound call request, and the outbound call request reaches a public switched telephone network 5 through a PSTN session boundary controller 4 to request an outbound call external mobile phone or a fixed telephone. After the opposite terminal telephone is connected and before the call is finished, the media stream passes through the PSTN SBC server 4 to the CTI server 3 to reach the WebRTC session boundary controller 2 for voice code conversion, and is converted into Opus by the G711/G.729 of the telephone, so that the voice quality of the Web terminal is improved.
Fig. 4 is a flow chart of the outbound method based on the web page instant messaging technology provided by the invention. As shown in fig. 4, the method includes:
step 101, a WebRTC terminal initiates an outbound request to a WebRTC session boundary controller;
102, the WebRTC session boundary controller receives the outbound request, performs session initial protocol conversion on the outbound request and then forwards the outbound request to a CTI server;
step 103, the CTI server receives the outbound request and sends the outbound request to a PSTN session boundary controller;
and 104, the PSTN session boundary controller receives the outbound request and sends the outbound request to a butted Public Switched Telephone Network (PSTN) so that the public switched telephone network initiates a call to the called terminal according to the number of the called terminal.
According to the outbound method based on the webpage instant messaging technology, the WebRTC terminal is used for initiating the outbound request, real-time communication can be realized through the browser without using any plug-in or client software, the real-time communication can be communicated with the set CTI, the method has the PSTN interaction capacity, the use scene of calling of a calling center at any time and any place is greatly improved, and meanwhile, the centralized management and control of the calling are ensured; the support to the WEB client in the outbound service is realized, and the large-scale expansion is favorably realized.
According to the outbound method based on the webpage instant messaging technology, before the WebRTC terminal initiates an outbound request to the WebRTC session boundary controller, the method further comprises the following steps: the WebRTC terminal sends a registration request to the WebRTC session boundary controller; the WebRTC session boundary controller receives the registration request and sends the registration request to a CTI server; the CTI server receives the registration request and sends the registration request to an authentication server; the authentication server receives the registration request and performs registration operation; and the registration operation comprises the steps of distributing an outbound number for the WebRTC terminal and sending the outbound number to the WebRTC terminal.
According to the outbound method based on the webpage instant messaging technology, disclosed by the invention, the authentication of the WebRTC terminal is realized by utilizing the authentication server, so that the online user authentication is realized, and the automatic distribution and centralized control of numbers can be realized; the authentication system can realize online linkage, is communicated with unified login, and reduces the workload of operation and maintenance.
According to the outbound method based on the webpage instant messaging technology, the WebRTC session boundary controller sends the registration request to the CTI server, and the method specifically comprises the following steps: and the WebRTC session boundary controller acquires a corresponding CTI server based on the IP address of the WebRTC terminal and sends the registration request to the corresponding CTI server.
According to the calling-out method based on the webpage instant messaging technology, the corresponding CTI server is obtained through the IP address based on the WebRTC terminal, and the registration request is sent to the corresponding CTI server, so that the load balance of the CTI server is favorably realized, and the processing efficiency is improved.
According to the outbound method based on the webpage instant messaging technology, provided by the invention, the outbound request comprises the outbound number; before the CTI server sends the outbound request to the PSTN session border controller, the method further comprises: acquiring an outbound available line bound by the WebRTC terminal according to the outbound number, and updating the outbound request according to the outbound available line; the PSTN session boundary controller sends the outbound request to a docked public switched telephone network, which specifically includes: and sending the outbound request to a butted public switched telephone network according to the outbound available line.
According to the outbound method based on the webpage instant messaging technology, the outbound available line bound by the WebRTC terminal is acquired according to the outbound number, and the actual outbound operation is carried out by utilizing the outbound available line, so that the flexible management of the number is realized.
According to the outbound method based on the webpage instant messaging technology, after the CTI server sends the outbound request to the PSTN session boundary controller, the method further comprises the following steps: the CTI server stores call related records and/or records calls.
The outbound method based on the webpage instant messaging technology effectively realizes call management by storing call related records and/or recording calls.
According to the outbound method based on the webpage instant messaging technology, the WebRTC session boundary controller receives the outbound request, performs session initial protocol conversion on the outbound request and then forwards the outbound request to the CTI server, and the method specifically comprises the following steps: and the WebRTC session boundary controller receives the outbound request, acquires a corresponding CTI server based on the IP address of the WebRTC terminal, and transmits the outbound request to the corresponding CTI server after session initial protocol conversion.
According to the call-out method based on the webpage instant messaging technology, the corresponding CTI server is obtained through the IP address based on the WebRTC terminal, and the call-out request is sent to the corresponding CTI server, so that the load balance of the CTI server is further promoted, and the processing efficiency is improved.
According to the outbound method based on the webpage instant messaging technology provided by the invention, after the called terminal answers the call and before the call is finished, the method further comprises the following steps: forming a media stream between the called terminal, the public switched telephone network, the PSTN session border controller, the CTI server, the WebRTC session border controller and the WebRTC terminal.
According to the calling-out method based on the webpage instant messaging technology, the CTI server supports the transmission of the media stream, and the media server does not need to be additionally and independently arranged, so that the simplification of equipment is facilitated.
According to the outbound method based on the webpage instant messaging technology provided by the invention, after the media stream passes through the PSTN session boundary controller and the CTI server and reaches the WebRTC session boundary controller, the method further comprises the following steps: the WebRTC session border controller performs voice transcoding on voice signals in the media stream.
According to the outbound method based on the webpage instant messaging technology, after the media stream reaches the WebRTC session boundary controller through the PSTN session boundary controller and the CTI server, the WebRTC session boundary controller performs voice coding conversion on voice signals in the media stream, and therefore the method is beneficial to improving the conversation quality of the WebRTC terminal.
According to the outbound method based on the webpage instant messaging technology, the WebRTC session boundary controller carries out voice code conversion on voice signals in media streams, and the method specifically comprises the following steps: the WebRTC session border controller converts the voice signals in the media stream from the phone's G711/g.729 encoding to Opus encoding.
The outbound method based on the webpage instant messaging technology provided by the invention has the advantages that the voice signal is converted into the Opus code from the G711/G.729 code of the telephone, the voice quality under low bandwidth is optimized by utilizing the characteristics of the Opus code, and the voice quality requirement of outbound communication is met.
Fig. 5 is a schematic processing flow diagram of a registration request in the outbound method based on the web page instant messaging technology provided by the invention. As shown in fig. 5, the processing flow of the registration request includes:
step S101, embedding an integrated WebRTC phone SDK in a user side (WebRTC terminal), transmitting an acquired user account and an applied secret key, adjusting the SDK to transmit a Register command, and transmitting the Register command to the WebRTC session boundary controller by the SDK.
And step S102, after receiving the request instruction, the WebRTC session boundary controller performs load balancing based on a client IP (IP of the WebRTC terminal), and transmits the instruction to the CTI server of the proxy.
Step S103, the CTI server receives the instruction, acquires the user account and the secret key, and requests the authentication server to perform authentication.
And step S104, if the authentication is successful, recording a registration address, and establishing connection between the CTI server and the user side through the WebRTC session boundary controller to keep heartbeat. And if the authentication fails, the authentication server returns a message of authentication failure to the user side.
Fig. 6 is a schematic view of a processing flow of an outbound request in the outbound method based on the web page instant messaging technology provided by the present invention. As shown in fig. 6, the processing flow of the outbound request includes:
step S201, the Web terminal (WebRTC terminal) sends an outbound request (outbound signaling) to the WebRTC session boundary controller.
Step S202, after the WebRTC session boundary controller receives the outbound request, load balancing is carried out based on a client IP (WebRTC terminal), and an instruction is transmitted to the CTI server of the proxy.
Step S203, the CTI server receives the outbound request instruction, acquires the user information, calls a number management module and acquires the user binding outbound available line.
Step S204, after the available line is obtained, the CTI server initiates an outbound (Invite) instruction and starts recording.
Step S205, after receiving the external call instruction, the PSTN SBC forwards the request to the butt-jointed public switched telephone network, and the external call is sent to the external dialing mobile phone or fixed telephone.
And S206, after the user answers the call and before the call is finished, the voice flows from the PSTN SBC to the WebRTC SBC to be subjected to code conversion, and the voice is converted into Opus voice codes through G.711/G729.
The outbound method based on the webpage instant messaging technology provided by the invention is based on the outbound system based on the webpage instant messaging technology, and is not described herein again.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. An outbound call system based on a web instant messaging technology (WebRTC) is characterized by comprising a WebRTC terminal, a WebRTC session boundary controller, a Computer Telephony Integration (CTI) server and a Public Switched Telephone Network (PSTN) session boundary controller; wherein:
the WebRTC terminal is used for initiating an outbound request to the WebRTC session boundary controller; wherein, the outbound request comprises the number of the called terminal;
the WebRTC session boundary controller is used for receiving the outbound request, performing session initial protocol conversion on the outbound request and then forwarding the outbound request to the CTI server;
the CTI server is used for receiving the outbound request and sending the outbound request to the PSTN session boundary controller;
the PSTN session boundary controller is used for receiving the outbound request and sending the outbound request to a butted public switched telephone network so that the public switched telephone network initiates a call to the called terminal according to the number of the called terminal.
2. The outbound system based on web page instant messaging technology as claimed in claim 1, wherein the system further comprises an authentication server; before the WebRTC terminal is configured to initiate an outbound request to the WebRTC session border controller, the WebRTC terminal is further configured to: sending a registration request to the WebRTC session boundary controller;
the WebRTC session boundary controller is also used for receiving the registration request and sending the registration request to a CTI server;
the CTI server is also used for receiving the registration request and sending the registration request to the authentication server;
the authentication server is used for receiving the registration request and performing registration operation; and the registration operation comprises the steps of distributing an outbound number for the WebRTC terminal and sending the outbound number to the WebRTC terminal.
3. The outbound system of claim 2, wherein the WebRTC session border controller, when configured to send the registration request to the CTI server, is specifically configured to:
and acquiring a corresponding CTI server based on the IP address of the WebRTC terminal, and sending the registration request to the corresponding CTI server.
4. The outbound system of claim 2 wherein said outbound request includes said outbound number; the CTI server, prior to being configured to send the outbound request to the PSTN session border controller, is further configured to:
acquiring an outbound available line bound by the WebRTC terminal according to the outbound number, and updating the outbound request according to the outbound available line;
when the PSTN session border controller is configured to send the outbound request to the docked public switched telephone network, the PSTN session border controller is specifically configured to: and sending the outbound request to a butted public switched telephone network according to the outbound available line.
5. The outbound system based on web instant messaging technology as claimed in claim 1, wherein the CTI server, after being configured to send the outbound request to the PSTN session border controller, is further configured to: storing call related records and/or recording calls.
6. The outbound system based on web page instant messaging technology as claimed in claim 1, wherein the WebRTC session border controller, when being configured to forward the outbound request after session initiation protocol conversion to the CTI server, is specifically configured to:
and acquiring a corresponding CTI server based on the IP address of the WebRTC terminal, and sending the outbound request to the corresponding CTI server after session initial protocol conversion.
7. The outbound system based on web page instant messaging technology as claimed in claim 1, wherein after the called terminal answers the call and before the call is ended, a media stream is formed among the called terminal, the PSTN session boundary controller, the CTI server, the WebRTC session boundary controller and the WebRTC terminal.
8. The outbound system of claim 7 wherein the WebRTC session border controller is further configured to perform voice transcoding on the voice signal in the media stream after the media stream passes through the PSTN session border controller and the CTI server to reach the WebRTC session border controller.
9. The outbound system of claim 8, wherein the WebRTC session border controller, when used to transcode speech signals in the media stream, is specifically configured to:
the speech signal in the media stream is converted by the telephone's G711/g.729 coding into Opus coding.
10. A method for calling out based on web page instant messaging technology (WebRTC), which is characterized by comprising the following steps:
the WebRTC terminal initiates an outbound request to a WebRTC session boundary controller;
the WebRTC session boundary controller receives the outbound request, performs session initial protocol conversion on the outbound request and then forwards the outbound request to a Computer Telephony Integration (CTI) server;
the CTI server receives the outbound request and sends the outbound request to a Public Switched Telephone Network (PSTN) session boundary controller;
and the PSTN session boundary controller receives the outbound request and sends the outbound request to a butted public switched telephone network so that the public switched telephone network initiates a call to the called terminal according to the number of the called terminal.
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