CN101483702A - Call pickup method and system based on soft switch - Google Patents
Call pickup method and system based on soft switch Download PDFInfo
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- CN101483702A CN101483702A CNA2008100018211A CN200810001821A CN101483702A CN 101483702 A CN101483702 A CN 101483702A CN A2008100018211 A CNA2008100018211 A CN A2008100018211A CN 200810001821 A CN200810001821 A CN 200810001821A CN 101483702 A CN101483702 A CN 101483702A
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Abstract
A call pickup method and system based on soft switch technology, including after a business control unit receiving a pickup access code of a pickup user, determining the media property of calling party corresponding to the pickup called party; the business control unit acquiring the media property of the calling party based on a media configuration unit and performing media interaction with the media property of the pickup party generated by a media matching unit, wherein the media configuration unit is used for generating the fake media description; the media matching unit is used for finishing the ability matching of the proximal end and remote end medias; the business control unit changing the media flow of the calling party to the pickup user, and notifying the media property of the pickup user to the calling party, and answering the pickup calling originated the pickup user. The network structure is simplified, and the stability and the reliability of the communication system are improved via applying this invention, at the same time, all interactions are finished via using the currently existed standard SIP protocol, without performing any extension to the SIP protocol.
Description
Technical field
The present invention relates to the communications field of call pick-up business, particularly a kind of call response substituting method and system based on Softswitch technology.
Background technology
Call pick-up (Call PickUp) business is a kind of important telecommunication service, be implemented as follows: calling subscriber A calls out user B in certain a group, party B-subscriber's ring, if B not or can not reply, at this moment after the user C that belongs to same Centrex group with B hears the terminal the tinkle of bells of B, substitute family B with oneself the mode of phone by dial-up operation and reply this calling, user C and A conversation, party B-subscriber's terminal stops ring.According to the dial mode of user C, the call pick-up business can be subdivided on the same group for answering and two kinds of designated pick-ups.In generation, answered and is meant that user C belongs to a generation and answers group on the same group, and some terminal rings are arranged in the group, and C is by dialling the co-group pickup service access code, can for answer this generation answer group interior first by the calling of incoming call.Designated pick-up is meant user B by the incoming call ring, C by dialling " designated pickup service access code "+" number of user B " thus generation answer party B-subscriber's calling, B, C user belong to same Centrex group.
The call pick-up business has a wide range of applications in traditional circuit domain, particularly in the same office of group customer.Along with the application in the communications field of IP and Softswitch technology, IP-based call pick-up business is also moved towards the market front end gradually.The implementation method of current call pick-up business based on SIP (session initiation) agreement has following defective:
1, when party B-subscriber's ring, and send " 200 OK " message that the party A-subscriber is entered conversation state,, cause charging inaccurate if party B-subscriber's dont answer still can have more the ticket that the party A-subscriber calls out the party B-subscriber when (do not comprise and being answered by generation) to the calling subscriber;
When 2, initiating " Update " by C user, need the terminal customization, versatility is poor;
3, bring C user with the medium (SDP) after party A-subscriber and the party B-subscriber's coupling, carrying out medium with C user alternately not necessarily can be successfully, and (support the A rule such as B, the party A-subscriber supports A rule, μ rule, and C user supports the μ rule, but the medium that return may be restrained for A, then can fail with C user interactions SDP);
4, to only being to answer in generation between the user of SIP business, still need to increase the media resource node, make the networking structure complexity, the fault point of system is increased, be unfavorable for improving the stability of system, and economy is also bad.
By as can be seen top, a kind of technical scheme that realizes the call pick-up business based on VOIP of current needs.
Summary of the invention
Technical problem to be solved by this invention provides a kind of call response substituting method and system based on Softswitch technology, introduces medium matching unit and medium dispensing unit, realizes the pick-up service of Session Initiation Protocol effectively; Do not need extra media resource during party B-subscriber's ring, directly passing through the transparent transmission of the 18x signaling of Session Initiation Protocol and transmit, oneself put ring-back tone by the A terminal, is not to put ring-back tone by the media resource node, simplify network configuration effectively, can effectively improve the stability and the reliability of system; When the party B-subscriber was not replied simultaneously, A can not produce ticket; The Update operation is initiated by communication system, does not need user terminal is carried out extra customization.
In order to address the above problem, the invention provides a kind of call response substituting method based on Softswitch technology, be applied to comprise the call pick-up system of Service Control Unit,
May further comprise the steps:
After a, described Service Control Unit receive that generation that generation answers the user answers access code, determine the pairing calling subscriber's of called subscriber that generation is answered medium property;
B, described Service Control Unit obtain described calling subscriber's medium property by the medium dispensing unit, the described generation that produces with the medium matching unit medium property of answering the user to carry out medium mutual; Wherein, described medium dispensing unit is used to produce false media description, and described medium matching unit is used to finish the capabilities match of near-end, distant end media;
C, described Service Control Unit are redirected to generation with calling subscriber's Media Stream and answer the user, notify the medium property that this generation answers the user to this calling subscriber, and reply this generation and answer Client-initiated described generation and answer calling.
Further, said method also can comprise, when described Service Control Unit reply described generation answer call out after, described Service Control Unit stops the ring of described called subscriber's side.
Further, said method also can comprise, comprise among the described step a,
If described Service Control Unit is after receiving that generation that generation answers the user answers access code, analyze be on the same group generation answer, then this Service Control Unit determine this generation answer generation under the user answer first incoming call in the queue queue of group, terminal is just at the pairing incoming call calling subscriber's of the called subscriber of ring medium property;
If described Service Control Unit is after receiving that generation that generation answers the user answers access code, analyzing is designated pick-up, then this Service Control Unit determine this generation answer the subscriber dialing appointment, terminal is just at the pairing incoming call calling subscriber's of the called subscriber of ring medium property.
Further, said method also can comprise, comprise among the described step b,
B1, described Service Control Unit take out the medium property of supporting whole abilities from the medium dispensing unit;
B2, described medium matching unit produce the medium property of answering whole abilities of user media attributes match with described generation, return to described Service Control Unit;
B3, described Service Control Unit answer the user for described generation and send " 200 OK " message, carry the medium property of the whole abilities after the described coupling in the message;
In B4, described generation, answered the user and send " ACK " response message for described Service Control Unit.
Further, said method also can comprise, when described calling subscriber's medium property is not empty, also comprises following steps among the described step b:
B5, described Service Control Unit are answered the user to described generation and are sent " re-invite " message, carry described calling subscriber's medium property in the message;
In B6, described generation, answered the user and send " 200 OK " message for described Service Control Unit;
B7, described Service Control Unit are answered the user for described generation and are sent " ACK " response message.
Further, said method also can comprise, among the described step c, may further comprise the steps,
C1, described Service Control Unit send " 200 OK " message to described calling subscriber, carry the medium property that described generation after the coupling answers the user in the message;
C2, described calling subscriber send " ACK " response message to described Service Control Unit.
Further, said method can comprise that also the medium property of answering the user when described generation also comprises following steps for empty among the described step c:
C3, described Service Control Unit are answered the user to described generation and are sent " re-invite " message; Carry described calling subscriber's medium property in the message;
In C4, described generation, answered the user and send " 200 OK " message to described Service Control Unit;
C5, described Service Control Unit are answered the user to described generation and are sent " ACK " response message.
Further, said method also can comprise, when described Service Control Unit reply described generation answer call out after, described Service Control Unit stops the ring of described called subscriber's side, may further comprise the steps,
D1, described Service Control Unit send " Cancel " message to stop this called subscriber's terminal ring to described called subscriber;
D2, described called subscriber send " 200 OK " message described to respond " Cancel " message to described Service Control Unit.
Further, said method can comprise that also answering calling when described generation is when generation is answered on the same group, further to comprise following steps:
Described Service Control Unit is answered the incoming call finished of deletion in the queue queue of group in generation, and just judges whether also to exist other incoming calls in ring, if then just other incoming calls of ring in described queue queue each to one of reach.
Further, said method also can comprise, when described calling subscriber's medium are not empty, and the medium property that described generation is answered the user is when empty, and described step b and step c are following steps:
BC1, described Service Control Unit are answered the user to described generation and are sent " 200 " message, carry described calling subscriber's medium property in the message;
In BC2, described generation, answered the user and send " ACK " response message to described Service Control Unit, carries the medium property that described generation answers the user in the message;
BC3, described Service Control Unit send " 200 " message to described calling subscriber, carry the medium property that described generation answers the user in the message;
BC4, described calling subscriber send " ACK " message to described Service Control Unit; So far it is mutual to finish the medium that described calling subscriber and described generation answer the user, and described calling subscriber's Media Stream is pointed to described generation answer the user.
Further, said method also can comprise, when described calling subscriber's medium are empty, and the medium property that described generation is answered the user is when empty, and described step b and step c are following steps:
CB1, described Service Control Unit send " 200 " message to described calling subscriber, carry the medium property that described generation answers the user in the message;
CB2, described calling subscriber send " ACK " response message to described Service Control Unit, carry described calling subscriber's medium property in the message;
CB3, described Service Control Unit are answered the user to described generation and are sent " 200 " message, carry described calling subscriber's medium property in the message;
In CB4, described generation, answered the user and send " ACK " message to described Service Control Unit; So far it is mutual to finish the medium that described calling subscriber and described generation answer the user, and described calling subscriber's Media Stream is pointed to described generation answer the user.
Further, said method also can comprise, when call subscriber terminal was not supported Session initiation Protocol, each message of described call subscriber terminal was finished translating between agreement that this call subscriber terminal supports and the Session initiation Protocol by network insertion node or media gateway controlling unit;
When described called subscriber and Dai answered user terminal and do not support Session initiation Protocol, each message that described called subscriber and Dai answer user terminal was finished this called subscriber and Dai by the network insertion node and is answered translating between agreement that user terminal supports and the Session initiation Protocol.
Further, said method can comprise that also described calling subscriber, called subscriber and Dai answer the user and use identical or dissimilar terminals, and wherein terminal type comprises following any one:
Fixed telephone, integrated services digital network terminal, SIP terminal, H323 terminal, software terminal, global system for mobile communications mobile phone, CDMA mobile phone, 3G (Third Generation) Moblie mobile phone, WLAN terminal, personal handyphone system terminal.
The present invention also provides a kind of call pick-up system based on Softswitch technology, comprises Service Control Unit,
Also comprise medium dispensing unit, medium matching unit, wherein the medium dispensing unit is used to produce false media description, and the medium matching unit is used to finish the capabilities match of near-end, distant end media;
After described Service Control Unit receives that generation that generation answers the user answers access code, determine the pairing calling subscriber's of called subscriber that generation is answered medium property; The medium dispensing unit obtains described calling subscriber's medium property, the described generation that produces with described medium matching unit the medium property of answering the user carry out medium and return to described Service Control Unit after mutual; Described Service Control Unit is redirected to generation with calling subscriber's Media Stream and answers the user, notifies the medium property that this generation answers the user to this calling subscriber, and replys this generation and answer Client-initiated described generation and answer calling.
Compared with prior art, use the present invention, when calling out called subscriber's ring, the calling subscriber do not need the participation of media server, simultaneously do not need to enter to reply attitude yet, after introducing medium dispensing unit and medium matching unit, can be good at finishing Service Control Unit, finish medium coupling and mutual process as a termination user agent function.Re-invite calls out and sends to corresponding terminal as required by communication system, does not need the specific customization of terminal to revise.The present invention has not only overcome the limitation of original technology, simplified network configuration, also help improving the stability and the reliability of communication system, also inherited simultaneously the advantage of original technology, it is all mutual to use existing standard Session Initiation Protocol to finish, not needing has any expansion, has adopted traditional call pick-up mode simultaneously Session Initiation Protocol, meets user's use habit.
Description of drawings
Fig. 1 is the flow chart of a kind of call response substituting method based on Softswitch technology in the specific embodiment of the invention;
Fig. 2 is that co-group pickup service is exhaled process chart in the specific embodiment of the invention;
Fig. 3 is a designated pickup service process chart in the specific embodiment of the invention;
Fig. 4 be when answer the present age in the instantiation of the present invention user A medium are arranged, when user C does not have medium, the pick-up service simplified flow chart;
Fig. 5 be when answer the present age in the instantiation of the present invention user A do not have medium, when user C has medium, the pick-up service simplified flow chart;
Fig. 6 is user A when answer the present age in the instantiation of the present invention, when C all has medium, the pick-up service simplified flow chart;
Fig. 7 is user A when answer the present age in the instantiation of the present invention, when C does not all have medium, the pick-up service simplified flow chart.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
The present invention is based on method and the system thereof that realizes the call pick-up business in the packet-based core networks under existing call control signaling (SIP/H323/H248) combined situation.
A kind of call pick-up system based on Softswitch technology of the present invention comprises a medium dispensing unit, is used to produce the SDP media description of a vacation; Also comprise a medium matching unit, be used to finish the capabilities match of near-end, distant end media; With the Service Control Unit is that the registered user provides miscellaneous service logic control function; This system comprises following part, Service Control Unit at least; Medium (SDP) dispensing unit; Medium (SDP) matching unit.
A kind of call pick-up system based on Softswitch technology, comprise Service Control Unit, medium dispensing unit, medium matching unit, wherein the medium dispensing unit is used to produce false media description, and the medium matching unit is used to finish the capabilities match of near-end, distant end media;
After described Service Control Unit receives that generation that generation answers the user answers access code, determine the pairing calling subscriber's of called subscriber that generation is answered medium property; The medium dispensing unit obtains described calling subscriber's medium property, the described generation that produces with described medium matching unit the medium property of answering the user carry out medium and return to described Service Control Unit after mutual; Described Service Control Unit is redirected to generation with calling subscriber's Media Stream and answers the user, notifies the medium property that this generation answers the user to this calling subscriber, and replys this generation and answer Client-initiated described generation and answer calling.
Calling subscriber, called subscriber and Dai answer the user and can use identical or dissimilar terminals in the specific embodiment of the invention, and terminal type can be following any one:
Fixed telephone, integrated services digital network terminal, SIP terminal, H323 terminal, software terminal, global system for mobile communications mobile phone, CDMA mobile phone, 3G (Third Generation) Moblie mobile phone, WLAN terminal, personal handyphone system terminal.
When call subscriber terminal was not supported Session initiation Protocol, each message that relates to this terminal in the method for the specific embodiment of the invention can be finished translating between agreement that this terminal supports and the Session initiation Protocol by network insertion node or media gateway controlling unit.
When described called subscriber and Dai answered user terminal and do not support Session initiation Protocol, each message that relates to this terminal in the method for the specific embodiment of the invention can be finished translating between agreement that this terminal supports and the Session initiation Protocol by the network insertion node.
As shown in Figure 1, a kind of call response substituting method based on Softswitch technology may further comprise the steps,
If described Service Control Unit is after receiving that generation that generation answers the user answers access code, analyze be on the same group generation answer, then this Service Control Unit determine this generation answer generation under the user answer first incoming call in the queue queue of group, terminal is just at the pairing incoming call calling subscriber's of the called subscriber of ring medium property.
If described Service Control Unit is after receiving that generation that generation answers the user answers access code, analyzing is designated pick-up, then this Service Control Unit determine this generation answer the subscriber dialing appointment, terminal is just at the pairing incoming call calling subscriber's of the called subscriber of ring medium property.
Described Service Control Unit is finished calling subscriber and mutual for the medium of answering between the user as a termination user agent.
Described Service Control Unit is answered the user by described medium property of described calling subscriber's Session Description Protocol and described generation, and to carry out medium mutual, may further comprise the steps:
B1, described Service Control Unit take out the medium property of supporting whole abilities from the medium dispensing unit;
B2, medium matching unit produce the medium property of answering whole abilities of user media attributes match with described generation, return to described Service Control Unit;
B3, described Service Control Unit answer the user for described generation and send " 200OK " message, carry the whole ability medium properties after the described coupling in the message;
In B4, described generation, answered the user and send " ACK " response message for described Service Control Unit.
Wherein, when described calling subscriber's medium property is not empty, also comprise following steps:
B5, described Service Control Unit are answered the user to described generation and are sent " re-invite " message, carry described calling subscriber's medium property in the message;
In B6, described generation, answered the user and send " 200 OK " message for described Service Control Unit;
B7, described Service Control Unit are answered the user for described generation and are sent " ACK " response message.
In the described step 30, may further comprise the steps,
C1, described Service Control Unit send " 200 OK " message to described calling subscriber, carry the medium property that described generation after the coupling answers the user in the message;
C2, described calling subscriber send " ACK " response message to described Service Control Unit.
Wherein, the medium property of answering the user when described generation also comprises following steps for empty:
C3, described Service Control Unit are answered the user to described generation and are sent " re-invite " message; Carry described calling subscriber's medium property in the message;
In C4, described generation, answered the user and send " 200 OK " message to described Service Control Unit;
C5, described Service Control Unit are answered the user to described generation and are sent " ACK " response message.
In the described step 40, may further comprise the steps,
D1, described Service Control Unit send " Cancel " message to stop this called subscriber's terminal ring to described called subscriber;
D2, described called subscriber send " 200 OK " message described to respond " Cancel " message to described Service Control Unit.
Wherein, to call out be when generation is answered on the same group, also to comprise following steps when described generation is answered:
Described Service Control Unit is answered the incoming call finished of deletion in the queue queue of group in generation, and just judges whether also to exist other incoming calls in ring, if then just other incoming calls of ring in described queue queue each to one of reach.
The medium property that both have only a side when described calling subscriber or described generation are answered the user and answer in generation is for empty, and the opposing party's medium property is when be sky, and above-mentioned steps 20 and step 30 can be simplified merging, and step 40 is constant.
When described calling subscriber's medium are not empty, and the medium property that described generation is answered the user is when empty, and step 20 and step 30 can be simplified and merge into following steps:
BC1, described Service Control Unit are answered the user to described generation and are sent " 200 " message, carry described calling subscriber's medium property in the message;
In BC2, described generation, answered the user and send " ACK " response message to described Service Control Unit, carries the medium property that described generation answers the user in the message;
BC3, described Service Control Unit send " 200 " message to described calling subscriber, carry the medium property that described generation answers the user in the message;
BC4, described calling subscriber send " ACK " message to described Service Control Unit; So far it is mutual to finish the medium that described calling subscriber and described generation answer the user, and described calling subscriber's Media Stream is pointed to described generation answer the user.
When described calling subscriber's medium are empty, and the medium property that described generation is answered the user is when empty, and step 20 and step 30 can be simplified and merge into following steps:
CB1, described Service Control Unit send " 200 " message to described calling subscriber, carry the medium property that described generation answers the user in the message;
CB2, described calling subscriber send " ACK " response message to described Service Control Unit, carry described calling subscriber's medium property in the message;
CB3, described Service Control Unit are answered the user to described generation and are sent " 200 " message, carry described calling subscriber's medium property in the message;
In CB4, described generation, answered the user and send " ACK " message to described Service Control Unit; So far it is mutual to finish the medium that described calling subscriber and described generation answer the user, and described calling subscriber's Media Stream is pointed to described generation answer the user.
The invention will be further described below in conjunction with instantiation.
Fig. 2 has described in the call response substituting method according to the first embodiment of the present invention, and generation is answered the signalling interactive process under the situation on the same group, and as shown in the figure, this process comprises following steps:
Step 101: calling subscriber A makes a call to the called subscriber, i.e. " invite " message [1]; In the present invention, user A can be the user of packet-based core networks, also can be the user of traditional circuit domain;
Step 102: after the Service Control Unit of called subscriber B was received " invite " message [1], if the called subscriber B free time, then Service Control Unit made a call to the terminal of user B, i.e. " invite " message [2];
Step 103: the terminal of user B sends " 18x " message [2] to Service Control Unit;
Step 104: Service Control Unit will receive that " 18x " message [2] is transmitted to the calling subscriber, i.e. " 18x " message [1]; At this moment the calling subscriber listens ring-back tone or CRBT; In addition present embodiment be on the same group generation situation about answering, promptly user B belongs to a generation and answers group, at this moment, as shown in the figure, the incoming call calling is joined this generation answer in the queue queue that organizes;
Step 105: user terminal C sends " invite " message [3] to Service Control Unit.As shown in the figure, in the present embodiment since be on the same group generation answer, in generation, answered user C and called subscriber B and belongs to a generation and answer group, user C hears the ring of user B, off-hook, group co-group pickup service access code;
Step 106: as shown in the figure, Service Control Unit is by answering the access code analysis to generation, judgement is a co-group pickup service, then takes out first incoming call calling (being calling subscriber A) from the queue queue of answering group for the generation of answering user C, and it is mutual that the SDP of employing calling subscriber A and user C carry out medium.Because answering the medium of user response to generation must be the medium that mate with C, consider the calling subscriber and carry the medium different situations for answering the user, with the flow process unification be, arrive first the medium dispensing unit and get a media description of supporting whole abilities, serve as the medium of calling subscriber A; When ac user's medium were sky, this step was absolutely necessary, and this step of other situations can be saved.(can referring to the simplified flow chart answered of generation, the step 306-309 among Fig. 4, the step 406-409 among Fig. 5, step 507-512 among Fig. 6, step 606-617 among Fig. 7);
Step 107: the medium matching unit will be according to certain logic, produce one with C user media coupling calling subscriber's medium (SDP (A ')); When ac user's medium all were not sky, the process that produces the medium after mating by the medium matching unit was indispensable;
Step 108: Service Control Unit is answered the user to generation and is sent " 200 " message [3], carries SDP (A ');
Step 109: in generation, answered the user and sends " ACK " response message [3] to Service Control Unit;
When in step 105, the medium that calling subscriber A and generation are answered user C all when empty, then also comprise following step 110-112;
Step 110: Service Control Unit is answered the user to generation and is sent " re-invite " message [3], carries party A-subscriber's medium in the message;
Step 111: in generation, answered the user and sends " 200 " message [3] to Service Control Unit, carries in the message and the C user media of A medium coupling (SDP (C '))
Step 112: Service Control Unit is answered the user to generation and is sent " ACK " response message [3];
Step 113: Service Control Unit sends " 200 " message [1] to calling subscriber A, carry in the message with party A-subscriber's medium coupling after the C user media;
Step 114: the calling subscriber sends " ACK " response message [1] to Service Control Unit;
If during step 105, when calling subscriber A answered user C medium and is sky with generation, then also comprise following step 115-117.
Step 115: Service Control Unit is answered the user to generation and is sent " re-invite " message [3]; Carry party A-subscriber's medium in the message;
Step 116: in generation, answered the user and sends " 200 " message [3] to Service Control Unit;
Step 117: Service Control Unit is answered the user to generation and is sent " ACK " response message [3];
Step 118: Service Control Unit sends " Cancel " message [2] to the called subscriber;
Step 119: the called subscriber sends " ACK " response message [2] to Service Control Unit; After this, as shown in the figure, under the generation situation about answering on the same group of this enforcement, Service Control Unit is answered the incoming call finished of deletion in the queue queue of group in generation, just moves on to head of the queue in second incoming call of ring with what existed;
By among above-mentioned first embodiment on the same group generation answer under the situation the call pick-up flow process as seen, Service Control Unit and medium dispensing unit and medium matching unit have been finished the user agent's that terminates function jointly among the present invention; On implementation, have basic different with described CN20051003414.7 patent.
The present invention is not only applicable among first embodiment on the same group for answering the situation of calling out, be applicable to the situation of designated pick-up too, Fig. 3 has described in call response substituting method according to a second embodiment of the present invention, signalling interactive process under the designated pick-up situation, as shown in the figure, this process comprises following steps:
Step 201: calling subscriber A makes a call to the called subscriber, i.e. " invite " message [1].In the present invention, user A can be the user of packet-based core networks, also can be the user of traditional circuit domain.
Step 202: after the Service Control Unit of called subscriber B was received " invite " message [1], if the called subscriber B free time, then Service Control Unit made a call to the terminal of user B, i.e. " invite " message [2];
Step 203: the terminal of user B sends " 18x " message [2] to Service Control Unit;
Step 204: Service Control Unit will receive that " 18x " message [2] is transmitted to the calling subscriber, i.e. " 18x " message [1]; At this moment the calling subscriber listens ring-back tone or CRBT; In addition present embodiment be on the same group generation situation about answering, promptly user B belongs to a generation and answers group, at this moment, as shown in the figure, the incoming call calling is joined this generation answer in the queue queue that organizes.
Step 205: user terminal C sends " invite " message [3] to Service Control Unit, and as shown in the figure, in the present embodiment, owing to be designated pick-up, generation is answered the ring that user C hears user B, off-hook, the Subscriber Number of group designated pickup service access code+user B;
Step 206: as shown in the figure, Service Control Unit is by answering the access code analysis to generation, designated pickup service during judgement, then take out generation answer the subscriber dialing appointment, terminal is just at the medium property of the incoming call calling subscriber A of called subscriber's correspondence of ring; It is mutual that the SDP of employing calling subscriber A and user C carry out medium.Because answering the medium of user response to generation must be the medium that mate with C, consider the calling subscriber and carry the medium different situations for answering the user, with the flow process unification be, arrive first the medium dispensing unit and get a media description of supporting whole abilities, serve as the medium of calling subscriber A; When ac user's medium were sky, this step was absolutely necessary.This step of other situations can be saved.(can referring to the simplified flow chart answered of generation, the step 306-309 among Fig. 4, the step 406-409 among Fig. 5, step 507-512 among Fig. 6, step 606-617 among Fig. 7).
Step 207: the medium matching unit will be according to certain logic, produce one with calling subscriber's medium of C user media coupling (SDP (A ')); When ac user's medium all were not sky, the process that produces the medium after mating by the medium matching unit was indispensable.
Step 208: Service Control Unit is answered the user to generation and is sent " 200 " message [3], carries SDP (A ');
Step 209: in generation, answered the user and sends " ACK " response message [3] to Service Control Unit;
When in step 205, the medium that calling subscriber A and generation are answered user C all when empty, then also comprise following step 210-212;
Step 210: Service Control Unit is answered the user to generation and is sent " re-invite " message [3], carries party A-subscriber's medium in the message;
Step 211: in generation, answered the user and sends " 200 " message [3] to Service Control Unit, carries in the message and the C user media of A medium coupling (SDP (C '))
Step 212: Service Control Unit is answered the user to generation and is sent " ACK " response message [3];
Step 213: Service Control Unit sends " 200 " message [1] to calling subscriber A, carry in the message with party A-subscriber's medium coupling after the C user media;
Step 214: the calling subscriber sends " ACK " response message [1] to Service Control Unit;
If during step 205, when calling subscriber A answered user C medium and is sky with generation, then also comprise following step 215-217.
Step 215: Service Control Unit is answered the user to generation and is sent " re-invite " message [3]; Carry party A-subscriber's medium in the message;
Step 216: in generation, answered the user and sends " 200 " message [3] to Service Control Unit;
Step 217: Service Control Unit is answered the user to generation and is sent " ACK " response message [3];
Step 218: Service Control Unit sends " Cancel " message [2] to the called subscriber;
Step 219: the called subscriber sends " ACK " response message [2] to Service Control Unit.
First and second embodiment illustrated respectively on the same group the generation answer and the designated pick-up situation under signaling process of the present invention.Their difference be on the same group the generation situation about answering under, the incoming call calling need be added in the queue queue of answering group, answering user's off-hook in generation then dials on the same group for after answering access code, answer user's generation from generation and answer taking-up first incoming call calling (calling subscriber A) the queue queue that organizes, adopt SDP and the user C of user A mutual, and in the end answer the incoming call finished of deletion in the queue queue of group in generation by Service Control Unit, just move on to head of the queue with what existed in second incoming call of ring.Their something in common is, all with Service Control Unit as the termination user agent, be responsible for acting on behalf of the calling subscriber and receive generation and answer user's calling.During answering user mutual in same calling subscriber respectively, generation, Service Control Unit all is in the status of " called ", initiatively the calling subscriber and the Dai of dialing answer the status that the user can keep " caller ", therefore can use existing standard Session Initiation Protocol to finish that all are mutual, not needing has any expansion to Session Initiation Protocol.
Fig. 4, Fig. 5, Fig. 6, Fig. 7 have described for the simplification flow process of answering, and that is to say that in some cases medium dispensing unit and medium matching unit are not necessarily.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (14)
1, a kind of call response substituting method based on Softswitch technology is applied to comprise it is characterized in that the call pick-up system of Service Control Unit,
May further comprise the steps:
After a, described Service Control Unit receive that generation that generation answers the user answers access code, determine the pairing calling subscriber's of called subscriber that generation is answered medium property;
B, described Service Control Unit obtain described calling subscriber's medium property by the medium dispensing unit, the described generation that produces with the medium matching unit medium property of answering the user to carry out medium mutual; Wherein, described medium dispensing unit is used to produce false media description, and described medium matching unit is used to finish the capabilities match of near-end, distant end media;
C, described Service Control Unit are redirected to generation with calling subscriber's Media Stream and answer the user, notify the medium property that this generation answers the user to this calling subscriber, and reply this generation and answer Client-initiated described generation and answer calling.
2, the method for claim 1 is characterized in that,
When described Service Control Unit reply described generation answer call out after, described Service Control Unit stops the ring of described called subscriber's side.
3, method as claimed in claim 2 is characterized in that,
Comprise among the described step a,
If described Service Control Unit is after receiving that generation that generation answers the user answers access code, analyze be on the same group generation answer, then this Service Control Unit determine this generation answer generation under the user answer first incoming call in the queue queue of group, terminal is just at the pairing incoming call calling subscriber's of the called subscriber of ring medium property;
If described Service Control Unit is after receiving that generation that generation answers the user answers access code, analyzing is designated pick-up, then this Service Control Unit determine this generation answer the subscriber dialing appointment, terminal is just at the pairing incoming call calling subscriber's of the called subscriber of ring medium property.
4, method as claimed in claim 3 is characterized in that,
Comprise among the described step b,
B1, described Service Control Unit take out the medium property of supporting whole abilities from the medium dispensing unit;
B2, described medium matching unit produce the medium property of answering whole abilities of user media attributes match with described generation, return to described Service Control Unit;
B3, described Service Control Unit answer the user for described generation and send " 200 OK " message, carry the medium property of the whole abilities after the described coupling in the message;
In B4, described generation, answered the user and send " ACK " response message for described Service Control Unit.
5, method as claimed in claim 4 is characterized in that,
When described calling subscriber's medium property is not empty, also comprise following steps among the described step b:
B5, described Service Control Unit are answered the user to described generation and are sent " re-invite " message, carry described calling subscriber's medium property in the message;
In B6, described generation, answered the user and send " 200 OK " message for described Service Control Unit;
B7, described Service Control Unit are answered the user for described generation and are sent " ACK " response message.
6, method as claimed in claim 5 is characterized in that,
Among the described step c, may further comprise the steps,
C1, described Service Control Unit send " 200 OK " message to described calling subscriber, carry the medium property that described generation after the coupling answers the user in the message;
C2, described calling subscriber send " ACK " response message to described Service Control Unit.
7, method as claimed in claim 6 is characterized in that
The medium property of answering the user when described generation also comprises following steps for empty among the described step c:
C3, described Service Control Unit are answered the user to described generation and are sent " re-invite " message; Carry described calling subscriber's medium property in the message;
In C4, described generation, answered the user and send " 200 OK " message to described Service Control Unit;
C5, described Service Control Unit are answered the user to described generation and are sent " ACK " response message.
8, method as claimed in claim 7 is characterized in that,
When described Service Control Unit reply described generation answer call out after, described Service Control Unit stops the ring of described called subscriber's side, may further comprise the steps,
D1, described Service Control Unit send " Cancel " message to stop this called subscriber's terminal ring to described called subscriber;
D2, described called subscriber send " 200 OK " message described to respond " Cancel " message to described Service Control Unit.
9, method as claimed in claim 8 is characterized in that,
Answering calling when described generation is when generation is answered on the same group, further to comprise following steps:
Described Service Control Unit is answered the incoming call finished of deletion in the queue queue of group in generation, and just judges whether also to exist other incoming calls in ring, if then just other incoming calls of ring in described queue queue each to one of reach.
10, method as claimed in claim 9 is characterized in that,
When described calling subscriber's medium are not empty, and the medium property that described generation is answered the user is when empty, and described step b and step c are following steps:
BC1, described Service Control Unit are answered the user to described generation and are sent " 200 " message, carry described calling subscriber's medium property in the message;
In BC2, described generation, answered the user and send " ACK " response message to described Service Control Unit, carries the medium property that described generation answers the user in the message;
BC3, described Service Control Unit send " 200 " message to described calling subscriber, carry the medium property that described generation answers the user in the message;
BC4, described calling subscriber send " ACK " message to described Service Control Unit; So far it is mutual to finish the medium that described calling subscriber and described generation answer the user, and described calling subscriber's Media Stream is pointed to described generation answer the user.
11, method as claimed in claim 10 is characterized in that
When described calling subscriber's medium are empty, and the medium property that described generation is answered the user is when empty, and described step b and step c are following steps:
CB1, described Service Control Unit send " 200 " message to described calling subscriber, carry the medium property that described generation answers the user in the message;
CB2, described calling subscriber send " ACK " response message to described Service Control Unit, carry described calling subscriber's medium property in the message;
CB3, described Service Control Unit are answered the user to described generation and are sent " 200 " message, carry described calling subscriber's medium property in the message;
In CB4, described generation, answered the user and send " ACK " message to described Service Control Unit; So far it is mutual to finish the medium that described calling subscriber and described generation answer the user, and described calling subscriber's Media Stream is pointed to described generation answer the user.
12, method as claimed in claim 11 is characterized in that,
When call subscriber terminal was not supported Session initiation Protocol, each message of described call subscriber terminal was finished translating between agreement that this call subscriber terminal supports and the Session initiation Protocol by network insertion node or media gateway controlling unit;
When described called subscriber and Dai answered user terminal and do not support Session initiation Protocol, each message that described called subscriber and Dai answer user terminal was finished this called subscriber and Dai by the network insertion node and is answered translating between agreement that user terminal supports and the Session initiation Protocol.
13, the method for claim 1 is characterized in that,
Described calling subscriber, called subscriber and Dai answer the user and use identical or dissimilar terminals, and wherein terminal type comprises following any one:
Fixed telephone, integrated services digital network terminal, SIP terminal, H323 terminal, software terminal, global system for mobile communications mobile phone, CDMA mobile phone, 3G (Third Generation) Moblie mobile phone, WLAN terminal, personal handyphone system terminal.
14, a kind of call pick-up system based on Softswitch technology comprises Service Control Unit, it is characterized in that,
Also comprise medium dispensing unit, medium matching unit, wherein the medium dispensing unit is used to produce false media description, and the medium matching unit is used to finish the capabilities match of near-end, distant end media;
After described Service Control Unit receives that generation that generation answers the user answers access code, determine the pairing calling subscriber's of called subscriber that generation is answered medium property; The medium dispensing unit obtains described calling subscriber's medium property, the described generation that produces with described medium matching unit the medium property of answering the user carry out medium and return to described Service Control Unit after mutual; Described Service Control Unit is redirected to generation with calling subscriber's Media Stream and answers the user, notifies the medium property that this generation answers the user to this calling subscriber, and replys this generation and answer Client-initiated described generation and answer calling.
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| CN2008100018211A CN101483702B (en) | 2008-01-09 | 2008-01-09 | Call pickup method and system based on soft switch |
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| CN2008100018211A CN101483702B (en) | 2008-01-09 | 2008-01-09 | Call pickup method and system based on soft switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102883081A (en) * | 2012-09-18 | 2013-01-16 | 浙江省电力公司 | Interconnection system and interconnection method |
| CN106550157A (en) * | 2015-09-19 | 2017-03-29 | 深圳市潮流网络技术有限公司 | A kind of implementation method of visualization pick-up service |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100819230B1 (en) * | 2002-12-18 | 2008-04-03 | 엘지노텔 주식회사 | Call Pick-up System of the Exchange and Operating Method thereof |
| EP1562358A1 (en) * | 2004-02-06 | 2005-08-10 | Siemens Aktiengesellschaft | Method for call pick-up |
| CN1848885B (en) * | 2005-04-13 | 2010-04-28 | 华为技术有限公司 | Call response substituting method in communication system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102883081A (en) * | 2012-09-18 | 2013-01-16 | 浙江省电力公司 | Interconnection system and interconnection method |
| CN102883081B (en) * | 2012-09-18 | 2014-04-02 | 浙江省电力公司 | Interconnection system and interconnection method |
| CN106550157A (en) * | 2015-09-19 | 2017-03-29 | 深圳市潮流网络技术有限公司 | A kind of implementation method of visualization pick-up service |
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| CN101483702B (en) | 2011-04-20 |
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