CN100583893C - Call monitoring method and system - Google Patents
Call monitoring method and system Download PDFInfo
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- CN100583893C CN100583893C CN200610090555A CN200610090555A CN100583893C CN 100583893 C CN100583893 C CN 100583893C CN 200610090555 A CN200610090555 A CN 200610090555A CN 200610090555 A CN200610090555 A CN 200610090555A CN 100583893 C CN100583893 C CN 100583893C
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Abstract
This invention discloses a call monitor method and a system, in which, the method includes: an applied server instructs soft-exchange to set a call time-length to monitor and release calls based on the time-length, and said system includes: an applied server and a soft exchange, in which, said applied server is used in instructing soft-exchange to set call time-length, said soft-exchange is used in monitoring and releasing call based on the call time-length.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of call monitoring method and system in the SIP network.
Background technology
Session initiation Protocol SIP (Session Initiation Protocol) be propose by the Internet engineering duty group IETF (Internet Engineering Task Force) one in IP based network, particularly in network environment, realize a kind of signaling protocol that real time communication is used because of this structure in the Internet.SIP can be used for creating, revises and stop a side or multi-party conversation.
The SIP node can run under the various modes, as user agent UserAgent, act on behalf of Proxy, registrar Register, back-to-back user agent's B2BUA (Back-to-Back User Agent is called application server AS (Application Server) usually again), location server etc.SIP has inherited a lot of characteristics of HTML (Hypertext Markup Language) HTTP (Hypertext Transfer Protocol), and its basic agreement operational mode is similar to HTTP.SIP also is based on the command response pattern, repeatedly retransmits order by a kind of simple mode, and up to receiving final response, this has just under any circumstance guaranteed the reception of SIP order.The SIP transmission can be undertaken by User Datagram Protoco (UDP) UDP (User Datagram Protocol) or transmission control protocol TCP (Transmission Control Protocol) agreement.Under the TCP mode,, provide the maintenance mechanism of transmission link between node, so the SIP node can obtain the state of the distant-end node that links to each other with certain SIP node by Transmission Control Protocol because this agreement is connection-oriented.
At present, to call business, be to monitor calling by application server AS based on SIP, AS carries out time budget, call charging according to value-added service configuration process call logic, and indicates the soft switch call release at the call conversation duration that allows to after date.
Seeing also Fig. 1, is prior art method for supervising flow chart, comprises step:
A1) AS sets up the SIP session;
AS receives about creating sip message and carries out the dialogue of network-originated call, or AS initiatively starts SIP dialog to set up calling network.
A2) AS sends call release message BYE to soft switch;
The call conversation duration that allows is to after date, and AS sends call release message BYE to soft switch, requires to discharge the SIP session.
A3) soft switch sends the 200OK response message to AS.
Soft switch is returned the 200OK response message after receiving the call release message BYE of AS transmission.
A4) soft switch sends call release message BYE to SIP session side;
Soft switch sends call release message BYE according to the request of AS to SIP session side.
A5) SIP session side sends the 200OK response message to soft switch.
After SIP received session side the call release message BYE of soft switch transmission, call accepted discharged, and returns the 200OK response message to soft switch.
But there is following limitation in said method:
In the SIP session, after the link interruption between AS and soft switch, SIP session both sides can also keep existing session, the call conversation duration of Yun Xuing is to after date so, AS can't indicate the soft switch call release, the SIP session that occurs in the network surpasses the situation that allows duration, thereby causes the revenue losses of operator.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of call monitoring method and system, and these method and system can solve the problem of call release after the link interruption between AS and soft switch.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of call monitoring method, comprising: the call conversation duration is set in application server indication soft switch; Soft switch is called out according to described call conversation duration monitoring, and according to described call conversation duration call release.
Further, described application server indication soft switch is set the call conversation duration and is comprised that specifically application server sends the message of carrying the call conversation duration value to soft switch, and soft switch is set the call conversation duration according to described call conversation duration value.
Further, also be included in before the soft switch call release application server indication soft switch replacement call conversation duration.
Further, also comprise after the soft switch call release, to application server answering call monitor message.
Described call monitoring information comprises the actual duration of call and call setup reference time.
Further, application server is initiated the terminated call request, and soft switch is according to the described request call release.
Accordingly, the invention provides a kind of call monitoring system, comprise application server and soft switch; Described application server is used to indicate soft switch to set the call conversation duration; Described soft switch is used for calling out according to described call conversation duration monitoring, and according to call conversation duration call release.
Described soft switch further comprises the call monitoring unit, is used for the indicative of settings call conversation duration according to application server, call out according to described call conversation duration monitoring, and according to call conversation duration call release.
Described application server further comprises calls out the result treatment unit, is used to receive the call monitoring information of soft switch, behind the soft switch call release to the calling result treatment unit of application server reporting call monitor message.
Above technical scheme is as can be seen:
In the aforementioned prior art, link interruption when between application server and soft switch, application server can't be indicated the soft switch call release, and in the present invention, application server is set the call conversation duration by the indication soft switch, and soft switch is by described call conversation duration supervising connections for calling, and at the call conversation duration to the after date call release, even the link interruption between application server and soft switch like this, when soft switch still can determine call release according to the call conversation duration of setting, thereby makes operator avoid unnecessary loss;
Further, the present invention is after calling out release, and soft switch comprises the actual duration of call and call setup reference time etc. to the in-depth monitoring information of application server reporting call, and application server can be understood session case better.
Description of drawings
Fig. 1 is a prior art call monitoring method flow chart;
Fig. 2 is that call conversation duration of the present invention is to after date soft switch call release flow chart;
Soft switch call release flow chart when Fig. 3 is the on-hook of SIP of the present invention session side;
Fig. 4 is a soft switch call release flow chart after the application server initiation terminated call of the present invention request;
Fig. 5 is a call monitoring system schematic of the present invention.
Embodiment
In SIP meeting telephone network, the invention provides a kind of call monitoring method and system, its core concept is: the call conversation duration is set in application server indication soft switch; Soft switch is called out according to described call conversation duration monitoring, and according to described call conversation duration call release.
The application service implement body is to set the call conversation duration by OPTIONS query messages indication soft switch.After calling out release, soft switch will be by the INFO notification message to application server reporting call monitor message, and call monitoring information comprises the actual duration of call and call setup reference time etc.In communication process, application server also can be by OPTIONS query messages indication soft switch replacement call conversation duration.
Below in conjunction with drawings and Examples the present invention is described in detail.
See also Fig. 2, be call conversation duration of the present invention to after date soft switch call release flow chart, comprise step:
B1) application server AS is set up the SIP session;
AS receives about creating sip message and carries out the dialogue of network-originated call, or AS initiatively starts SIP dialog to set up calling network.
B2) AS sends the query messages OPTIONS of the identifying call letters duration of call to soft switch;
After setting up the SIP session, AS sends OPTION message to soft switch, the OPTIONS message identifier call conversation duration T1, the call monitoring unit of soft switch starts the T1 timer according to the information of receiving, call out according to T1 value monitoring, and when the T1 value expires with call release.The T1 value specifically is arranged on the User Part of OPTIONSURI (unified resource identifier).Simultaneously, in OPTIONS message, go back the reference time of designated call, form is: the date Hour Minute Second is YYYYMMDDHIMISS.
In session is carried out, the AS T1 value of can resetting as required, promptly the OPTIONS message that sends the new call conversation duration value of sign once more is to soft switch, and this moment, the serial number CSeq value of message did not increase, and the call monitoring unit of soft switch will be called out according to new T1 value monitoring.New timer value is the absolute value of the timer of the reference time of appointment in initial request, and unit be second, should be not less than from send initial request extremely current the duration of process.The timer value initial reference time can not be changed.
B3) soft switch sends response message 200OK to AS;
The OPTION message that AS sends is received in soft switch, if accept the call conversation duration T1 value of its setting, then responds to AS by 2XX message such as 200OK, illustrates that call monitoring starts.If OPTIONS message has been specified the reference time of calling out, soft switch must be with reference to this time value, if OPTIONS message reference time of designated call not, then soft switch is with reference to receiving that from the callee dialogue confirms the time of ACK message.The absolute time of timer value for being continued from the session of designated reference time, unit is second.This is soft switch and the AS common recognition for the session internal form.
B4) soft switch sends call release message BYE to SIP session side;
Call conversation duration T1 value expires, and the call monitoring unit of soft switch will send call release message BYE to SIP session side.
B5) SIP session side sends the 200OK response message to soft switch;
After SIP received session side the call release message BYE of soft switch transmission, call accepted discharged, and returns the 200OK response message to soft switch.
B6) soft switch sends INFO to AS;
The call monitoring unit of soft switch sends the monitoring report notice by INFO to the calling result treatment unit of AS, comprising call duration and the details such as reference time of timer initiation time.
B7) AS sends the 200OK response message to soft switch;
The calling result treatment unit of AS returns the 200OK response message to soft switch after receiving the INFO of soft switch transmission.AS will charge according to the monitoring report content in the INFO of receiving.
B8) soft switch sends call release message BYE to AS;
Soft switch will send call release message BYE to AS after AS sends INFO and receives response, discharge AS side Session Resources.
B9) AS sends the 200OK response message to soft switch.
After AS received the call release message BYE of soft switch transmission, call accepted discharged, and returns the 200OK response message to soft switch.
Need to prove, if the call conversation duration T1 value monitoring calling that the link interruption of AS and soft switch, soft switch still send according to AS, and in the T1 value to the after date call release, guarantee that the SIP session is in the duration of pre-payment, thereby guarantee benefits of operators.
See also Fig. 3, soft switch call release flow chart during the on-hook of SIP of the present invention session side comprises step:
C1) AS sets up the SIP session;
AS receives about creating sip message and carries out the dialogue of network-originated call, or AS initiatively starts SIP dialog to set up calling network.
C2) AS sends the query messages OPTIONS of the identifying call letters duration of call to soft switch;
After setting up the SIP session, AS sends OPTION message to soft switch, the OPTIONS message identifier call conversation duration T1, the call monitoring unit of soft switch starts the T1 timer according to the information of receiving, according to T1 value monitoring calling, when the T1 value expires with call release.The T1 value specifically is arranged on the User Part of OPTIONS URI (unified resource identifier).Simultaneously, in OPTIONS message, go back the reference time of designated call, form is: the date Hour Minute Second is YYYYMMDDHIMISS.
In session was carried out, the AS T1 value of can resetting as required, the OPTIONS message that sends the new call conversation duration value of sign once more were to soft switch, and this moment, the serial number CSeq value of message did not increase, and calling will be monitored according to new T1 value in the call monitoring unit of soft switch.New timer value is the absolute value of the timer of the reference time of appointment in initial request, and unit be second, should be not less than from send initial request extremely current the duration of process.The timer value initial reference time can not be changed.
C3) soft switch sends response message 200OK to AS;
The OPTION message that AS sends is received in soft switch, if accept the call conversation duration T1 value of its setting, then responds to AS by 2XX message such as 200OK, illustrates that call monitoring starts.If OPTIONS message has been specified the reference time of calling out, soft switch must be with reference to this time value, if OPTIONS message reference time of designated call not, then soft switch is with reference to receiving that from the callee dialogue confirms the time of ACK message.The absolute time of timer value for being continued from the session of designated reference time, unit is second.This is soft switch and the AS common recognition for the session internal form.
C4) send call release message BYE to soft switch after the on-hook of SIP session side;
After the on-hook of SIP session side, will send call release message BYE to soft switch.
C5) soft switch sends the 200OK response message to SIP session side;
After the call release message BYE of SIP session side transmission was received in soft switch, call accepted discharged, and returns the 200OK response message to SIP session side.
C6) soft switch sends INFO to AS;
The call monitoring unit of soft switch sends the monitoring report notice by INFO to the calling result treatment unit of AS, comprising call duration and the details such as reference time of timer initiation time.
C7) AS sends the 200OK response message to soft switch;
The calling result treatment unit of AS returns the 200OK response message to soft switch after receiving the INFO of soft switch transmission.AS will charge according to the monitoring report content in the INFO of receiving.
C8) soft switch sends call release message BYE to AS;
Soft switch will send call release message BYE to AS after AS sends INFO and receives response, discharge AS side Session Resources.
C9) AS sends the 200OK response message to soft switch.
After AS received the call release message BYE of soft switch transmission, call accepted discharged, and returns the 200OK response message to soft switch.
Seeing also Fig. 4, is soft switch call release flow chart after the application server initiation terminated call of the present invention request, comprises step:
D1) AS sets up the SIP session;
AS receives about creating sip message and carries out the dialogue of network-originated call, or AS initiatively starts SIP dialog to set up calling network.
D2) AS sends the query messages OPTIONS of the identifying call letters duration of call to soft switch;
After setting up the SIP session, AS sends OPTION message to soft switch, the OPTIONS message identifier call conversation duration T1, the call monitoring unit of soft switch starts the T1 timer according to the information of receiving, according to T1 value monitoring calling, when the T1 value expires with call release.The T1 value specifically is arranged on the User Part of OPTIONS URI (unified resource identifier).Simultaneously, in OPTIONS message, go back the reference time of designated call, form is: the date Hour Minute Second is YYYYMMDDHIMISS.
In session is carried out, the AS T1 value of can resetting as required, promptly the OPTIONS message that sends the new call conversation duration value of sign once more is to soft switch, and this moment, the serial number CSeq value of message did not increase, and the call monitoring unit of soft switch will be called out according to new T1 value monitoring.New timer value is the absolute value of the timer of the reference time of appointment in initial request, and unit be second, should be not less than from send initial request extremely current the duration of process.The timer value initial reference time can not be changed.
D3) soft switch sends response message 200OK to AS;
The OPTION message that AS sends is received in soft switch, if accept the call conversation duration T1 value of its setting, then responds to AS by 2XX message such as 200OK, illustrates that call monitoring starts.If OPTIONS message has been specified the reference time of calling out, soft switch must be with reference to this time value, if OPTIONS message reference time of designated call not, then soft switch is with reference to receiving that from the callee dialogue confirms the time of ACK message.The absolute time of timer value for being continued from the session of designated reference time, unit is second.This is soft switch and the AS common recognition for the session internal form.
D4) AS sends call release message BYE to soft switch;
AS sends call release message BYE to soft switch, requires to discharge SIP and calls out.
D5) soft switch sends the 200OK response message to AS.
The call monitoring unit of soft switch returns the 200OK response message to AS after receiving the call release message BYE of AS transmission.
D6) soft switch sends call release message BYE to SIP session side;
The call monitoring unit of soft switch sends call release message BYE according to the request of AS to SIP session side.
D7) SIP session side sends the 200OK response message to soft switch;
After SIP received session side the call release message BYE of soft switch transmission, call accepted discharged, and returns the 200OK response message to soft switch.
Above-mentioned is call monitoring method flow chart of the present invention, with next be that AS sends OPTION message, soft switch response OPTION message and soft switch send situation from the INFO that contains monitor message to AS to soft switch in calling out.
One: in the call session from the OPTION request message of AS:
OPTIONS sip:＜T1 value 〉.＜reference time〉address SIP/2.0
Call-ID:
zVz7Qo.815@172.18.69.4
Contact:<sip:172.18.69.4:5061>
Content-Length:0
CSeq:1OPTIONS
From:<sip:172.18.69.4>；tag＝2GGT.1581R.00072.18.69.4
Max-Forwards:70
To:<sip:172.18.66.50>
User-Agent:HTIPL-SipStack?1.0.0.0
Via: SIP/2.0/udp
172.18.69.4:5061；branch＝z9hG4bKeu2re4mk53ee909u.9j5burnofdwo3vie277526
First trip shows it is OPTIONS message in the above-mentioned message, comprising the reference time of call conversation duration T1 value and calling, the Call-ID field shows calls out ID, the Contact field shows link address, the Content-Length field shows message content length, the CSeq field shows the message sequence numbering, the From field shows the sender, the Max-Forwards field shows the max-forwards number of times, the To field shows the recipient, the User-Agent field shows the user agent, and the Via field shows the message travels path.
This message sends in conversation procedure.Parameter wherein such as sender, recipient should be mated the details in the INVITE request.
Two: the message of soft switch response AS OPTION:
SIP/2.0200OK
Via： SIP/2.0/udp
172.18.69.4:5061；branch＝z9hG4bKeu2re4mk53ee909u.9j5burnofdwo3vie277526
From:<sip:172.18.69.4>；tag＝2GGT.1581R.000172.18.69.4
To:<sip:172.18.66.50>；tag＝4149a347-340e4-ac124232
Call-ID:
zVz7Qo.815@172.18.69.4
CSeq:1OPTIONS
Accept:application/SDP，application/ISUP，multipart/mixed，application/vnd.siemens.key-event
Supported:timer
Supported:100rel
Allow:ACK
Allow:INFO
Allow:BYE
Allow:CANCEL
Allow:INVITE
Allow:OPTIONS
Allow:NOTIFY
Allow:PRACK
Content-Length:0
First trip shows it is the 200OK response message in the above-mentioned message, the Via field shows the message travels path, the From field shows the sender, the To field shows the recipient, the Call-ID field shows calls out ID, the CSeq field shows the message sequence numbering, the Accept field shows type of receipt, the Supported field shows supports timer and reliable Temporary Response, the Allow field shows that the SIP Method type of permission comprises acknowledge message ACK, notification message INFO, cancellation message CANCEL, invitation message INVITE, query messages OPTIONS, notice message NOTIFY and affirmation provisional response message PRACK, the Content-Length field shows message content length.
Three: the monitored results notification message format:
INFO sip:＜call out accurate duration, reference time〉@10.223.10.98:5061SIP/2.0
Call-ID:
zVz7Qo.815@172.18.69.4
To:<sip:172.18.66.50>
From:<sip:172.18.69.4>；tag＝2GGT.1581R.00072.18.69.4
Contact:<sip:172.18.69.4:5061>
Via: SIP/2.0/udp
172.18.69.4:5061；branch＝z9hG4bKeu2re4mk53ee909u.9j5burnofdwo3vie277526
Content-Length:0
CSeq:1?INFO
Max-Forwards:70
User-Agent:HTIPL-SipStack1.0.0.0
First trip shows it is the notification message INFO in the above-mentioned message, comprising the reference time of calling out accurate duration value and calling, the Call-ID field shows calls out ID, the To field shows the recipient, the From field shows the sender, the Contact field shows link address, the Via field shows the message travels path, the Content-Length field shows message content length, the CSeq field shows the message sequence numbering, the Max-Forwards field shows the max-forwards number of times, and the User-Agent field shows the user agent.
The User Part of INFO URI comprises the response details content, and according to further application demand, the INFO body is the portability out of Memory also.
The above-mentioned the present invention of describing in detail carries out the method for call monitoring in the SIP session, need to prove, in the present invention, be not limited to telecom carrier-class device and application such as application server AS, soft switch, soft switch of the present invention also can be extended to Proxy agency or the back-to-back user agent of B2BUA etc.Any SIP session has been set up session as long as satisfy, and there is the duration restriction in session, can use the present invention program.
Accordingly, the invention provides a kind of call monitoring system.Seeing also Fig. 5, is call monitoring system schematic of the present invention.
Call monitoring system 500 comprises application server 501 and soft switch 502; Application server 501 is used to indicate soft switch 502 to set the call conversation duration; Soft switch 502 is used for according to described call conversation duration supervising connections for calling, and at the call conversation duration to the after date call release.
Soft switch 502 further comprises call monitoring unit 5021, is used for the indicative of settings call conversation duration according to application server 501, and according to described call conversation duration supervising connections for calling, at the call conversation duration to the after date call release.
After application server 501 is set up the SIP session, send OPTION message to soft switch 502, the OPTIONS message identifier call conversation duration T1, the call monitoring unit 5021 of soft switch 502 starts the T1 timer according to the information of receiving, call out according to T1 value monitoring, when the T1 value expires with call release.The T1 value specifically is arranged on the User Part of OPTIONS URI (unified resource identifier).Simultaneously, in OPTIONS message, go back the reference time of designated call, form is: the date Hour Minute Second is YYYYMMDDHIMISS.
The OPTION message that application server 501 sends is received in soft switch 502, if accept the call conversation duration T1 value of its setting, then responds to application server 501 by 2XX message such as 200OK, illustrates that call monitoring starts.If OPTIONS message has been specified the reference time of calling out, soft switch 502 must be with reference to this time value, if OPTIONS message reference time of designated call not, then soft switch 502 is with reference to receiving that from half-session 503 dialogue confirms the time of ACK message.The absolute time of timer value for being continued from the session of designated reference time, unit is second.
Application server 501 is in communication process, can be as required by OPTIONS query messages indication soft switch 502 replacement call conversation durations, this moment, application server 501 sent the OPTIONS message of the new call conversation duration value of sign once more to soft switch 502, this moment, the serial number CSeq value of message did not increase, and the call monitoring unit 5021 of soft switch 502 will be called out according to new T1 value monitoring.New timer value is the absolute value of the timer of the reference time of appointment in initial request, and unit be second, should be not less than from send initial request extremely current the duration of process.The timer value initial reference time can not be changed.
Application server 501 further comprises calls out result treatment unit 5011, be used to receive the call monitoring information of soft switch 502, the call monitoring unit 5021 of soft switch 502 comprises to the calling result treatment unit of application server 501 5011 reporting call monitor messages after the calling of half-session 503 discharges, specifically be by the INFO notification message to the calling result treatment unit of application server 501 5011 reporting call monitor messages, described call monitoring information comprises the actual duration of call and call setup reference time.
If application server 501 is initiated the terminated call request, the call monitoring unit 5021 of soft switch 502 discharges half-session 503 according to described request and calls out.
Need to prove, if the link interruption of application server 501 and soft switch 502, the call monitoring unit 5021 of soft switch 502 is still called out according to the call conversation duration T1 value monitoring that application server 501 sends, and in the T1 value to the after date call release, guarantee that the SIP session is in the duration of pre-payment, thereby guarantee benefits of operators.
More than a kind of call monitoring method provided by the present invention and system are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (9)
1, a kind of call monitoring method is characterized in that, comprising:
The call conversation duration is set in application server indication soft switch;
Soft switch is called out according to described call conversation duration monitoring, and according to described call conversation duration call release.
2, call monitoring method according to claim 1 is characterized in that:
Described application server indication soft switch is set the call conversation duration and is comprised that specifically application server sends the message of carrying the call conversation duration value to soft switch, and soft switch is set the call conversation duration according to described call conversation duration value.
3, call monitoring method according to claim 2 is characterized in that:
Also be included in before the soft switch call release application server indication soft switch replacement call conversation duration.
4, according to claim 2 or 3 described call monitoring methods, it is characterized in that:
Also comprise after the soft switch call release, to application server answering call monitor message.
5, call monitoring method according to claim 4 is characterized in that:
Described call monitoring information comprises the actual duration of call and call setup reference time.
6, call monitoring method according to claim 1 is characterized in that:
Application server is initiated the terminated call request, and soft switch is according to the described request call release.
7, a kind of call monitoring system is characterized in that:
Comprise application server and soft switch;
Described application server is used to indicate soft switch to set the call conversation duration;
Described soft switch is used for calling out according to described call conversation duration monitoring, and according to call conversation duration call release.
8, call monitoring according to claim 7 system is characterized in that:
Described soft switch further comprises the call monitoring unit, is used for the indicative of settings call conversation duration according to application server, call out according to described call conversation duration monitoring, and according to call conversation duration call release.
9, according to claim 7 or 8 described call monitoring systems, it is characterized in that:
Described application server further comprises calls out the result treatment unit, is used to receive the call monitoring information of soft switch, behind the soft switch call release to the calling result treatment unit of application server reporting call monitor message.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610090555A CN100583893C (en) | 2006-06-27 | 2006-06-27 | Call monitoring method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610090555A CN100583893C (en) | 2006-06-27 | 2006-06-27 | Call monitoring method and system |
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| Publication Number | Publication Date |
|---|---|
| CN101047713A CN101047713A (en) | 2007-10-03 |
| CN100583893C true CN100583893C (en) | 2010-01-20 |
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|---|---|---|---|
| CN200610090555A Expired - Fee Related CN100583893C (en) | 2006-06-27 | 2006-06-27 | Call monitoring method and system |
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