CN105592012A - SIP communication-based offline callback method and server - Google Patents
SIP communication-based offline callback method and server Download PDFInfo
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Abstract
The invention provides an SIP communication-based offline callback method. The method is used for enabling the SIP server to build and initiate offline callback service operation after an ordinary call initiated to a called terminal by a calling terminal fails. The method particularly comprises the following steps: a, the SIP server starts to monitor a connection state of the called terminal, and whether the connection state of the called terminal is changed from an offline state into a registered connection state is detected; b, once the called terminal is in the registered connection state, the SIP server initiates a first offline callback call to the calling terminal; and c, the SIP server initiates a second offline callback call to the called terminal, bridge connection is carried out on the first offline callback call and the second offline callback call, and offline callback communication between the calling terminal and the called terminal is built. The automatic offline callback function of the scheme of the invention enables a network telephone to be more intelligent, and the user experience of the network telephone is further enhanced.
Description
Technical field
The invention belongs to communication technique field, relate in particular to the audio call technology based on SIP communication.
Background technology
Along with development and the maturation of IT and CT technology, VoIP development rapidly, VoIP service based on agreements such as SIP provides abundant speech business, and along with video coding and decoding technology development and network bandwidth dilatation, what video call and meeting also can indifferences is linked into Unified Communication.
In existing VoIP terminal device application, terminal use, could called call such as sip terminal only has after registration. Now, if this sip terminal do not register, or because unstable networks goes offline, or the situation such as Power supply interruption we be referred to as off-line state. In the time that other people need to call out this offline user, this calling meeting is not because user registers and the user that can not find the called, if this user is provided with off-line voice mail, calling subscribe can leave a message to called subscriber, otherwise will directly call unsuccessfully. Therefore be necessary to provide a kind of new call business, ensure that called subscriber also can know this call information in off-line state, and after its registration is reached the standard grade the automatic calling subscribe before callback, experience thereby can further improve user.
Summary of the invention
The object of the invention is to provide a kind of off-line back calling method and server based on SIP communication between communicating terminal, the terminal called calling subscribe before automatic callback after registration is reached the standard grade who makes in off-line state.
For achieving the above object, technical scheme of the present invention is as follows:
An off-line back calling method based on SIP communication, initiates, after ordinary call failure, to be created and initiated the operation of off-line call-back service by sip server to terminal called for calling terminal, specifically comprises the following steps:
Step a, sip server are opened the connection status of terminal called are monitored, and whether the connection status that detects this terminal called changes, and whether changes to registration connection status by off-line state;
Step b, when terminal called once in registration connection status, sip server is initiated the calling of the first off-line callback to calling terminal;
Step c, sip server are initiated the calling of the second off-line callback to terminal called, the calling of the calling of the first off-line callback and the second off-line callback is carried out to bridge joint simultaneously, set up the off-line callback call of calling terminal and terminal called.
Preferably, before step a, also comprise: calling terminal dialing called number is to the terminal called invitation signaling that makes a call; Sip server is resolved described calling and is invited signaling, and the connection status of local search terminal called, once terminal called in off-line state, sip server will create off-line call-back service for calling terminal.
Preferably, above-mentioned establishment off-line call-back service comprises: sip server is stored described called number, is deposited under the off-line callback queue of calling terminal by described called number.
Preferably, after step b, also comprise: sip server detects calling terminal on-hook signaling or abandons enabling after described off-line call-back service signaling, called number is deleted from the off-line callback queue of described calling terminal.
Preferably, after step c, also comprise: sip server detects after on-hook signaling, and called number is deleted from the off-line callback queue of calling terminal.
Preferably, calling terminal is replied off-hook signaling for the calling that receives the first off-line callback, and sip server further sends prompting signaling and shows that this calling is off-line call-back service.
Preferably, calling terminal, in the time creating off-line call-back service, obtains and stores off-line call-back service information, comprising: described called number, call time, the calling origin of an incident, and callee's name.
A kind of off-line callback server based on SIP communication, for connecting the dial-up between calling terminal and terminal called, this server comprises following functions module: call processing unit, be responsible in the time opening off-line call-back service, initiate the calling of the first off-line callback to calling terminal, and in the time that calling terminal is agreed to enable off-line call-back service, initiate the calling of the second off-line callback to terminal called, the calling bridge joint of the calling of the first off-line callback and the second off-line callback is got up simultaneously, set up off-line callback call; Offline search unit, for following the tracks of the network connection state of monitoring terminal called, judges whether terminal called changes to registration connection status from off-line state; Processor, in control and management server, each functional module, in order to create off-line call-back service and to initiate off-line call-back service, and further comprises and triggers the network connection state tracking enquiry of described offline search unit to terminal called; Memory, is used for storing off-line call-back service information, the operation of off-line call-back service, and the queuing data of off-line callback, and in the time creating new off-line call-back service, called number is added in the queuing data of off-line callback.
Preferably, above-mentioned server also comprises prompting signaling receiving and transmission interface, and with the sending and receiving that calling terminal is pointed out signaling, prompting signaling comprises off-line call-back service information, off-line call-back service operation indicating. Wherein, off-line call-back service information comprises: described called number, call time, the calling origin of an incident, and callee's name.
Preferably, processor detects on-hook signaling or abandons enabling after described off-line call-back service signaling, called number corresponding above-mentioned terminal called is deleted from the queuing data of off-line callback.
In the present invention, designed a kind of new business type, i.e. off-line call back service. First at server, such as on sip server to the signing off-line call back service of calling subscribe, in the time that calling is called, if called off-line, whether sip server finds that caller possesses off-line call back service, and voice message caller is called not online, need to callback caller after called party online, caller can be by button such as # keyboard represents to accept this business, and refusal is directly on-hook. After a period of time, called subscriber is due to network recovery, or the upper server of the registration such as restore electricity, server detects that this user registers, and before finding, has the calling of the off-line call back service of having contracted to cross that this is called, and server initiatively gets up former calling, after caller off-hook, pointing out this is the off-line call back service of registration before, and then server gets up called calling, connects the call of main dialing telephone and called phone after called off-hook.
Technical scheme of the present invention, can avoid in the time that network state is unstable, and called phone is omitted some important callings because of temporary transient off-line. By the network state of the called phone of the automatic tracing and monitoring of sip server end, and automatically carry out callback process, promoted greatly efficiency and the end-to-end customer experience of call conversation process.
Brief description of the drawings
Fig. 1 is the schematic flow sheet that in the specific embodiment of the invention, main dialing telephone makes a call;
Fig. 2 is off-line call-back service communication flow figure mono-in the specific embodiment of the invention;
Fig. 3 is off-line call-back service communication flow figure bis-in the specific embodiment of the invention;
Fig. 4 is the flow chart that in the specific embodiment of the invention, main dialing telephone arranges off-line call-back service;
Fig. 5 is the functional block diagram of sip server in the specific embodiment of the invention.
Specific embodiment
Technical problem to be solved by this invention is: if when called IP terminal is in off-line state, how to make the upper line states of this called IP terminal of sip server automatic acquisition, and make a call from trend caller IP terminal and called IP terminal, and connect both calls.
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the technical scheme in the embodiment of the present invention is carried out to clear, complete description. Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention. Based on the embodiment in the present invention, the every other embodiment that those skilled in the art obtains belongs to the scope of protection of the invention.
General principle of the present invention is: on sip server, calling terminal preserved in record, the information of terminal called, and detect the presence of terminal called, once finding above-mentioned terminal called registers and reaches the standard grade, sip server initiatively makes a call to this calling terminal, terminal called when sip server is again to ordinary call before after calling terminal off-hook makes a call, after terminal called off-hook, connect the call between calling terminal and terminal called by sip server, thereby the auto back calling function after realizing terminal called and reaching the standard grade, avoid omitting some important phones.
In the specific embodiment of the invention, we describe as an example of the calling communication between IP phone A and IP phone B example. Wherein, phone A and phone B are managed by sip server, and in ordinary call business, phone A is main dialing telephone, and phone B is called phone. And now phone A registers, and to the signing off-line call back service of sip server; Phone B is in off-line state, do not comprise not registration, or registered but because unstable networks goes offline, or Power supply interruption etc.
Fig. 1 is the schematic flow sheet that in the specific embodiment of the invention, main dialing telephone makes a call. Fig. 2 is off-line call-back service communication flow figure mono-in the specific embodiment of the invention. Fig. 3 is off-line call-back service communication flow figure bis-in the specific embodiment of the invention. Shown in Fig. 1, Fig. 2 and Fig. 3, the concrete steps of carrying out off-line call-back service at sip server end are as follows:
Step 101: phone A calls out phone B by sip server, first user A sends and calls out invite message request to sip server, and from territory is A, and to territory is B.
Step 102:SIP server is received the invite message of phone A, finds it is to call out phone B, at the state of local search phone B after resolving.
Step 103:SIP server judges the connection state of phone B, if phone B, in off-line state, continues step 104, otherwise directly goes to step 109, terminated call.
Step 104: send prompting signaling to phone A, whether need to enable off-line call back service for prompting. For example give user's playing alert tones, such as " called number is unregistered, and enabling off-line call-back service please press the # key, and abandons asking direct on-hook ", common way is to tell phone A, the prompt tone that need to listen PBX to play with SIP183 band SDP.
Step 105: receive the signaling that phone A replys, further judge whether phone A enables off-line call-back service, if enabled, subsequent steps 106, creates off-line call-back service by sip server for phone A; If do not enabled, forward step 109 terminated call to.
Step 106:SIP server creates off-line call-back service, and storage called number, is deposited into by the number of called phone B under the off-line callback queue of off-line call-back service side phone A.
Step 107: open the monitoring to called phone B connection status, follow the tracks of the change of called phone B state. The state that monitors B is exactly the SIP registration request that monitors phone B in fact, once the legal registration request that has phone B to send, PBX need to trigger off-line call-back service after register message is replied to 200.
Step 108: enter off-line call-back service operator scheme, now concrete operating process please refer to diagram and the related text explanation of Fig. 2.
Step 109: terminated call.
In conjunction with the off-line call-back service communication flow figure shown in Fig. 2 and Fig. 2, phone A enabled after off-line call-back service a period of time, if after sip server end detects that called phone B registration is reached the standard grade, find that phone B, in the callback queue of phone A, is started to initiate the off-line call-back service of main dialing telephone A by sip server. Now mainly comprise following operating procedure:
Step 201:SIP server is initiatively initiated the calling of the first off-line callback to phone A, sends call signaling Invite (A) to former main dialing telephone A.
Step 202: phone A receives the calling of sip server and carries out ring, and whether reminding user needs off-hook to answer. If phone A off-hook is answered, reply sip server 100trying, 180altering, a series of signalings of 200answer.
Step 203:SIP server receives the off-hook of phone A and replys signaling, further point out phone A: " this is off-line call-back service; destination is phone B; phone B reaches the standard grade; need to call out B? " now, phone A directly on-hook abandons enabling off-line call-back service, also can dial the button of agreement, such as numerical key 1, determine and call out phone B. If phone A enables off-line call-back service, continue step 204, otherwise enter the calling of step 207 terminate offline callback.
Step 204: phone A dials numerical key 1, enables off-line call-back service, sends Dtmf (infoorinband) signaling to sip server by phone A, and sip server is further to phone A play cuing, just shows that, at callback phone B, please wait a moment.
Step 205:SIP server is initiated the calling of the second off-line callback by Invite (B) signaling to called phone B. , in the ring of phone B end, whether reminding user has incoming call, need off-hook to answer.
Step 206:SIP server receives the off-hook of phone B and replys after signaling, the calling bridge joint of the calling of the first off-line callback and the second off-line callback got up, thus the call of setting up phone A and phone B.
Step 207:SIP server detects phone A and the on-hook signaling of phone B any one party, and sip server is deleted the number of B in the off-line callback queue of phone A.
Step 208: the calling of terminate offline callback.
Fig. 4 is the flow chart that in the specific embodiment of the invention, main dialing telephone arranges off-line call-back service. As known in the figure, when phone A end arranges off-line call-back service and sip server end establishment off-line call-back service, mainly comprise following operating procedure:
Step S1: initiate ordinary call, user, by phone A dialing keyboard, inputs the number of called phone B, initiates one via sip server and calls out invitation.
Step S2: receive sip server and send prompting signaling, resolve and show or by voice message: " called number is unregistered, and enabling off-line call-back service please press the # key; Abandon asking direct on-hook ".
Step S3: judge whether to enable " off-line call-back service ", if enable this business, subsequent steps S4, otherwise go to step, if do not enable " off-line call-back service ", phone A sends direct on-hook signal to sip server, by sip server, terminated call is set.
Step S4: extract and store off-line call-back service information, comprise called number B, call time, these information can automatic acquisition storage in the time making a call according to phone A or sip server. In addition, according to particular user demand, also can be by the manual incoming call origin of an incident of user, callee's name.
The above-mentioned information that step S5:SIP server end receives phone A storage is also correlated with to preserve simultaneously and is arranged, as called number B is deposited into off-line call-back service side, in the off-line callback queuing data of phone A. The signaling of sip server transmission simultaneously to enabling of phone A prompting off-line call-back service arranges successfully.
Step S6: phone A receives that above-mentioned off-line call-back service arranges after successful signaling, provides prompting " off-line call-back service is enabled successfully, can on-hook ".
Step S7: do not enable " off-line call-back service ", the direct on-hook of user, arranges end ordinary call by sip server.
When phone A successfully enables after off-line call back service by aforesaid operations step, if user wants to cancel before this business triggers, user can be by dialing condition code, such as * 77#B#, wherein B represents the number of phone B, cancel the off-line call-back service for phone B, sip server receives after such condition code, and the number that only need to delete the phone B in the off-line callback queue that phone A is corresponding just.
Fig. 5 is the functional block diagram of sip server in the specific embodiment of the invention. As known in the figure, at sip server end, mainly comprise following functions module: processor, memory, offline search unit, call processing unit, and prompting signaling receiving and transmission interface.
Wherein, offline search unit, be mainly used in judging the network connection state of called phone B, and this status information is informed to processor, such as, receive the invite message of phone A when sip server, after resolving, find it is to call out after phone B, further carry out the state of inquiring telephone B by this offline search unit. Initiate after off-line call-back service when main dialing telephone, sip server is followed the tracks of the change of called phone B state, once detect that phone B reaches the standard grade, notification processor control call processing unit further carries out callback.
Prompting signaling receiving and transmission interface, main and sending and receiving that main dialing telephone A points out signaling. on the one hand, in the time creating off-line call-back service, obtain off-line call-back service information from main dialing telephone A end, comprise call time, call out the origin of an incident, called number, and callee's name etc. on the other hand, in the time initiating off-line call-back service, the off-line call-back service of being correlated with operation sends to main dialing telephone end in order to inform user by some communication signalings, for example, be with SDP to tell main dialing telephone by SIP183, in order to play relevant prompt tone: " called number is unregistered, enabling off-line call-back service please press the # key, abandon asking direct on-hook ", " this is off-line call-back service, destination is phone B, phone B reaches the standard grade, need to call out B? " in addition, above-mentioned off-line call-back service information also sends to phone A end by this prompting signaling receiving and transmission interface, the relevant information of calling out before reminding for further friendship.
Memory, for storing queuing data of off-line call-back service information, off-line callback etc. Wherein, when the on-hook signaling of talk line any one party being detected, in the off-line callback queue of phone A, the number of phone B will be deleted.
Call processing unit, mainly be responsible in the present invention connecting in the communication of initiating off-line call-back service, finding phone B when above-mentioned offline search unit connects and reaches the standard grade, the calling that this call processing unit is initiatively initiated the first off-line callback is to phone A, send call signaling Invite (A) to former main dialing telephone A, and in the time that phone A agrees to enable off-line call business, initiatively initiate the calling of the second off-line callback by Invite (B) signaling to called phone B. Reply after signaling when the off-hook of phone B, the calling bridge joint of the calling of the first off-line callback and the second off-line callback is got up, thereby the call of setting up phone A and phone B realizes the communication of off-line callback.
Processor, be in charge of and control above-mentioned each functional module in order to create off-line call-back service, and initiate off-line call-back service, comprising: point out by controls that signaling receiving and transmission interface obtains off-line call-back service information when the establishment off-line call-back service, control call processing unit is initiated off-line call-back service.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (11)
1. the off-line back calling method based on SIP communication, is characterized in that, initiates, after ordinary call failure, to be created and initiated the operation of off-line call-back service by sip server to terminal called for calling terminal, specifically comprises the following steps:
Step a, described sip server are opened the connection status of described terminal called are monitored, and whether the connection status that detects described terminal called changes, and whether changes to registration connection status by off-line state;
Step b, when described terminal called is once in described registration connection status, described sip server is initiated the calling of the first off-line callback to described calling terminal;
Step c, described sip server are initiated the calling of the second off-line callback to described terminal called, the calling of the calling of described the first off-line callback and described the second off-line callback is carried out to bridge joint simultaneously, set up the off-line callback call of described calling terminal and described terminal called.
2. method according to claim 1, is characterized in that, comprises before described step a: described calling terminal dialing called number is to the described terminal called invitation signaling that makes a call; Described sip server is resolved described calling and is invited signaling, and the connection status of terminal called described in local search, once described terminal called in off-line state, described sip server will create off-line call-back service for described calling terminal.
3. method according to claim 2, is characterized in that, described establishment off-line call-back service comprises: described sip server is stored described called number, is deposited under the off-line callback queue of described calling terminal by described called number.
4. method according to claim 3, it is characterized in that, after described step b, also comprise: described sip server detects described calling terminal on-hook signaling or abandons enabling after described off-line call-back service signaling, described called number is deleted from the off-line callback queue of described calling terminal.
5. method according to claim 4, is characterized in that, also comprises: described sip server detects after on-hook signaling, and described called number is deleted from the off-line callback queue of described calling terminal after described step c.
6. method according to claim 5, is characterized in that, described calling terminal is replied off-hook signaling for the calling that receives described the first off-line callback, and described sip server further sends prompting signaling and shows that this calling is described off-line call-back service.
7. method according to claim 6, is characterized in that, described prompting signaling can show and also can report with speech form with written form.
8. method according to claim 7, is characterized in that, described calling terminal, in the time creating described off-line call-back service, obtains and store off-line call-back service information, comprising: described called number, call time, the calling origin of an incident, and callee's name.
9. the off-line callback server based on SIP communication, for connecting the dial-up between calling terminal and terminal called, is characterized in that, described server comprises following functions module:
Call processing unit, be responsible in the time opening off-line call-back service, initiate the calling of the first off-line callback to described calling terminal, and in the time that described calling terminal is agreed to enable off-line call-back service, initiate the calling of the second off-line callback to described terminal called, the calling bridge joint of the calling of described the first off-line callback and described the second off-line callback is got up simultaneously, set up off-line callback call;
Offline search unit, for following the tracks of the network connection state of monitoring described terminal called, judges whether terminal called changes to registration connection status from off-line state;
Processor, in server, each functional module, in order to create off-line call-back service and to initiate off-line call-back service, and further comprises and triggers the network connection state tracking enquiry of described offline search unit to described terminal called described in control and management;
Memory, is used for storing off-line call-back service information, the operation of off-line call-back service, and the queuing data of off-line callback, and in the time creating new off-line call-back service, called number is added in the queuing data of described off-line callback.
10. server according to claim 9, it is characterized in that, described server also comprises prompting signaling receiving and transmission interface, the sending and receiving of pointing out signaling with described calling terminal, described prompting signaling comprises off-line call-back service information, off-line call-back service operation indicating, described off-line call-back service information comprises: described called number, call time, the calling origin of an incident, and callee's name.
11. servers according to claim 10, is characterized in that, described processor detects on-hook signaling or abandons enabling after described off-line call-back service signaling, called number corresponding described terminal called is deleted from the queuing data of described off-line callback.
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Application publication date: 20160518 |