CN100421531C - Call release control system and call release control method - Google Patents
Call release control system and call release control method Download PDFInfo
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- CN100421531C CN100421531C CNB2006100568161A CN200610056816A CN100421531C CN 100421531 C CN100421531 C CN 100421531C CN B2006100568161 A CNB2006100568161 A CN B2006100568161A CN 200610056816 A CN200610056816 A CN 200610056816A CN 100421531 C CN100421531 C CN 100421531C
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Abstract
The present invention discloses a call release control system which comprises an SIP user proxy node, a call session control unit and a user terminal, wherein the SIP user proxy node controls call release according to a call release control mode, and an off-hook event and an on-hook event of the user terminal. The present invention also discloses a call release control method which comprises the steps that the off-hook/on-hook event is generated by the user terminal; the call release is controlled by the SIP user proxy node according to the call release control mode and the off-hook/on-hook event. According to the present invention, release control systems of calling control, called control and calling/called both-party control can be provided, and thereby, various requirements can be adapted, such as the called control required by an emergency call.
Description
Technical field
The present invention relates to a kind of communication technology, relate in particular to a kind of call release control system and call out releasing control method.
Background technology
At present, continuous maturation along with group technology, develop based on Circuit-switched conventional telecommunication network towards broadband telecommunication net based on packet switching, the grouping telecommunications network is prepared or set up in a lot of operations commercial city, though it is developing tendency in future that the user uses the packet communications terminal to insert the grouping telecommunications network, but operator is in the process of construction of grouping telecommunications network, can not make the unified terminal equipment of changing of all contracted users, therefore the grouping telecommunications network of present stage should be able to be supported the access of conventional terminal at least, and the telecommunications network that divides into groups so just needs PSTN (public switched telephone network (PSTN)) business of inheriting tradition.
In the prior art, in NGN (next generation network) standard of working out as ITU-T and ETSI, conventional terminal is accessed to NGN and is its traditional PSTN business that provides by NGN, be called PSTN simulation services (Emulation Service), it adopts the call control signalling of SIP (Session initiation Protocol) as the grouping telecommunications core network, conventional terminal can access to the grouping telecommunications network by certain network insertion node device, finishes translating of analog subscriber signaling and grouping signaling by this equipment.
In the packet field network of prior art, as shown in Figure 1, its call flow is as follows.
Step 101:Alice makes a call to Bob, and promptly Alice sends to Bob and invites (INVITE) message, the address of carrying Bob in the message;
After step 102:Bob receives INVITE, send ring (180 Ringing) message to Alice, notice Alice message receives that Alice is put ring-back tone;
Step 103:Bob off-hook sends 200 OK message to Alice;
Step 104:Alice sends affirmation (ACK) message to Bob and confirms, sets up session;
At this moment, between Alice and Bob, set up a media channel, to realize communicate.
Step 105:Bob on-hook discharges this time and calls out, and sends BYE message to Alice simultaneously;
Step 106:Alice receives BYE message, discharges the resource of local terminal, sends 200 OK response to Bob simultaneously.
Can transmit message through other node between Alice and the Bob in the above-mentioned flow process.
By above-mentioned call flow as can be known, terminal generally can initiatively discharge the grouping Media Stream passage of having set up after on-hook in existing packet domain call control protocol SIP.
Yet, this method may not be fine in some cases, such as when certain user terminal is called out fire alarm number 119, if in the time of can realizing this user terminal on-hook, this is not called out and discharges immediately, could discharge but wait for a period of time, then can save user terminal and in a period of time that sets, call out once more the time of 119 terminals, thereby protect your time for this emergency saving.
Summary of the invention
Target of the present invention provides a kind of call release control system and calls out releasing control method, can provide mutually do not control, the calling release control flow of caller control, called control and caller/called both sides' control.
The invention discloses a kind of call release control system, described call release control system comprises Session initiation Protocol sip user agent node, calls out release control mode determining unit and user terminal,
Described user terminal is used to produce off-hook and/or onhook event;
Described calling discharges the control mode determining unit and is used for according to call request and calls out discharging the calling release control mode that this calling is determined in control table;
Described user agent's node is used for calling out release control according to calling out the off-hook and/or the onhook event that discharge control mode and user terminal;
Wherein, described calling release control mode is divided according to the controlling party of call release.
Described calling discharges the control mode determining unit and is positioned on sip user agent node, Service Control Unit, the calling conversation control unit, or as functional entity existence separately.
Described calling discharges the control mode determining unit and comprises:
Call out the release control table, it comprises user terminal number and calls out the release control mode;
Judging unit is used for according to call request and calls out discharging the calling release control mode that this calling is determined in control table.
Described sip user agent node comprises:
Receiving element is used to receive off-hook, the onhook event of user terminal, and receipt of call discharges the calling that the control mode determining unit determines and discharges control mode;
Processing unit is used for determining whether discharging this calling according to calling out the off-hook, the onhook event that discharge control mode and user terminal;
Transmitting element is used for the handled result of processing unit is issued the sip user agent node of opposite side.
Described sip user agent node also comprises:
Call out the release control timer, be used to determine this to call out the time that after the on-hook of Be Controlled side, is continued.
The invention also discloses a kind of calling releasing control method, comprising:
The calling that A, sip user agent node obtain this calling discharges control mode, and described calling discharges control mode and determines that according to this call request and calling release control table user terminal produces off-hook/onhook event;
B, sip user agent node are called out release control according to calling out release control mode and off-hook/onhook event;
Wherein, described calling release control mode is divided according to the controlling party of call release.
Described calling discharges control mode and comprises mutually not control mode, caller control mode, called control mode and both sides' control mode.
When call out discharging control mode for mutually not during control mode, described step B specifically comprises: when the sip user agent node was received the user terminal onhook event, the sip user agent node discharged this calling.
When calling release control mode was the caller control mode, described step B further comprised:
B1, when the sip user agent node is received present networks call subscriber terminal onhook event, the sip user agent node discharges this calling;
B2, when the sip user agent node is received present networks called user terminal onhook event, the sip user agent node discharges this calling according to caller control mode control.
Described step B2 further comprises:
B21, called user terminal send onhook event to the sip user agent node;
After B22, sip user agent node are received the onhook event of called user terminal transmission, start and call out the release control timer;
B23, call out discharging control timer in the time, if the sip user agent node is received the off-hook event of called user terminal, then will call out the zero clearing of release control timer;
B24, control timer is overtime when call out discharging, sip user agent node call release.
When calling release control mode was called control mode, described step B further comprised:
B3, when the called user terminal on-hook in the present networks, the sip user agent node discharges this calling;
B4, when the call subscriber terminal on-hook in the present networks, the sip user agent node discharges this calling according to the control of called control mode.
Described step B4 further comprises:
B41, call subscriber terminal send onhook event to the sip user agent node;
After B42, sip user agent node are received the onhook event of call subscriber terminal transmission, start and call out the release control timer;
B43, call out discharging control timer in the time, if the sip user agent node is received the off-hook event of call subscriber terminal, then will call out the zero clearing of release control timer;
B44, control timer is overtime when call out discharging, sip user agent node call release.
When calling release control mode was both sides' control mode, described step B further comprised:
B5, when call subscriber terminal in the present networks and/or called user terminal on-hook, the sip user agent node discharges this calling according to both sides' control mode control.
Described step B5 further comprises:
B51, call subscriber terminal and/or called user terminal send onhook event to the sip user agent node;
After B52, sip user agent node are received the onhook event of call subscriber terminal and/or called user terminal transmission, start and call out the release control timer;
B53, call out discharging control timer in the time, if the sip user agent node is received the off-hook event of call subscriber terminal and/or called user terminal, then will call out the zero clearing of release control timer;
B54, control timer is overtime when call out discharging, sip user agent node call release.
Whether overtime control call release further comprises described sip user agent node according to calling out the release control timer:
When calling release control timer was overtime, the sip user agent node discharged this calling;
When calling release control timer was not overtime, the sip user agent node kept this calling.
The calling release control mode that described sip user agent node obtains this calling specifically comprises:
Call out and discharge the definite release control mode of calling out of control mode determining unit; And the calling that will determine release control mode is issued the sip user agent node.
Therefore, according to the present invention, call out and discharge the definite release control mode of calling out of determining unit, to call out the release control mode then and issue the sip user agent node, the sip user agent node comes controlling call to discharge flow process according to calling out the dislodging machine incident that discharges control mode and user terminal, therefore, according to calling out the difference that discharges control mode, the present invention can provide caller control, called control and caller/multiple calling releasing control methods such as called both sides' control.These call out releasing control method can adapt to multiple demand, such as the needed called control of urgent call.
Description of drawings
Fig. 1 shows the call flow of prior art;
Fig. 2 shows the schematic diagram of call release control system of the present invention;
Fig. 3 and Fig. 4 show caller when control of the embodiment of the invention and call out the flow chart that discharges control;
Fig. 5 and Fig. 6 show and call out the flow chart that discharges control when the embodiment of the invention is called to be controlled.
Embodiment
Understand and realization the present invention the existing embodiments of the invention of describing in conjunction with the accompanying drawings for the ease of persons skilled in the art.
Before describing the present invention, at first introduce kind and implication that the calling that the present invention relates to discharges control mode.
Call out discharging control mode generally includes: do not control mutually, caller control, called control and both sides' control.Wherein not controlling mutually is the simplest a kind of release control mode, either party on-hook in referring to call out, and this calling just is released; Caller control is meant the release that is come controlling call by caller, during Called Onhook, calls out release immediately, within a certain period of time, if called off-hook again, conversation can be proceeded, when calling release control timer was overtime, under the situation that perhaps The Calling Party Hooks On, calling just was released; Called control is opposite with caller control, and it is by the release of being called controlling call; Both sides control is meant caller and called release that all can controlling call, after either party on-hook, must wait timeout after, call out and just be released.
To discharge control mode in order determining to call out, can to call out release control mode table or/and be provided with one in the sip user agent node at calling conversation control unit, Service Control Unit.Described calling discharges the control mode table and comprises: user terminal number, calling discharge control mode.Like this, when having determined user terminal number, just can determine to call out the release control mode.In addition, discharge control mode, also can in calling release control mode table, add other field,, be used for representing that calling release control mode is effective or invalid in this time period as the time period in order to determine calling neatly.
Basic thought of the present invention is, calling conversation control unit in packet network, Service Control Unit are called out release control mode table or/and be provided with one in the sip user agent node, be used for determining that this calling discharges control mode, call out releasing operation so that the sip user agent node discharges the control mode execution according to the calling of determining.Described calling discharges control mode and comprises caller control mode, called control mode and both sides' control mode.
As shown in Figure 2, according to the present invention, the invention provides a kind of call release control system, described call release control system comprises user terminal, sip user agent node, calling conversation control unit and Service Control Unit.
The user of institute terminal is used to produce off-hook and/or onhook event, and described user terminal is the terminal of PSTN.
Described sip user agent node is the sip user agent that user terminal inserts packet-based core networks, user terminal can be direct or indirect be connected to the sip user agent node, the sip user agent node provides the function of translating between analog subscriber signaling and the packet-based core networks control signaling SIP; Analog subscriber information and core net control signaling SIP translates function and can directly finish, also can be by other packet call control signaling, as the H248 agreement, translate indirectly and finish, under the situation of translating indirectly, need sip user agent node or other network node to finish function and other packet call control signaling are controlled signaling SIP to core net the function of translating of translating of analog subscriber signaling and other packet call control signaling.
According to the present invention, described sip user agent node also is used for the receipt of call Session Control Unit or the definite calling of Service Control Unit discharges control mode, according to the calling release control mode of determining calling is discharged then and controls.Described sip user agent node comprises: receiving element be used to receive off-hook, onhook event that calling terminal and terminal called are sent, and receipt of call discharges the calling that the control mode determining unit determines and discharges control mode; Call out the release control timer, be used to determine this to call out the time that after the on-hook of Be Controlled side, is continued; Processing unit is used for determining whether discharging this calling according to calling out the off-hook, the onhook event that discharge control mode and user terminal; Transmitting element is used for the handled result of processing unit is issued the sip user agent node of opposite side.In addition, also can be provided with in the sip user agent node and call out release control mode determining unit, described calling discharges the control mode determining unit and comprises: call out the release control table, it comprises that user terminal number and calling discharge control mode; Judging unit is used for discharging the calling release control mode that this calling is determined in control table according to the user terminal number and the calling of call request.
Described calling conversation control unit provides functions such as calling control, route continue for the registered user (as the POTS terminal use) who inserts packet-based core networks, it can be toggled to Service Control Unit with calling, also can route the call to other calling conversation control unit; Calling conversation control unit can also will be called out other network of route by interface gateway equipment, as the PSTN network.E1 interface between calling conversation control unit and the sip user agent node all uses Session Initiation Protocol to the E2 interface of other calling conversation control unit with to the E3 interface of Service Control Unit.E1, E2, the E3 interface can directly connect, also can be by other network node switching.According to the present invention, described calling conversation control unit is provided with to call out and discharges the control mode determining unit, and described calling release control mode determining unit comprises: call out the release control table, it comprises user terminal number and calls out the release control mode; Judging unit is used for discharging the calling release control mode that this calling is determined in control table according to the user terminal number and the calling of call request.
Described Service Control Unit is host's execution environment of miscellaneous service for the registered user who inserts packet-based core networks provides miscellaneous service logic control function.Can have the Service Control Unit of a plurality of processing different business to exist, Service Control Unit and calling conversation control unit also can merge in the physical entity equipment and realize.According to the present invention, described Service Control Unit is provided with to call out and discharges the control mode determining unit, and described calling release control mode determining unit comprises: call out the release control table, it comprises user terminal number and calls out the release control mode; Judging unit is used for discharging the calling release control mode that this calling is determined in control table according to the user terminal number and the calling of call request.
The present invention also provides a kind of calling releasing control method, can discharge control mode realization calling release control according to calling out.Described calling discharges control mode and comprises caller control mode, called control mode and both sides' control mode, discharges control mode to above-mentioned three kinds by the following examples and is described respectively.
Embodiment
The basic thought of present embodiment is to call out release function to be finished jointly by calling conversation control unit and/or Service Control Unit and sip user agent node, in calling procedure, calling conversation control unit and/or Service Control Unit discharge control table according to the both sides' number and the calling of this calling, determine the release control mode of this calling, the calling that to determine then discharges control mode notice sip user agent node, and whether the sip agent node is controlled this calling according to the dislodging machine incident of calling out release control mode, user terminal and discharged.
1, caller control mode
Fig. 3 and Fig. 4 show the call flow under the caller control mode situation.In this call flow, its Calling Side user can be from this PSTN analogue system, also can be from other PSTN analogue system or PSTN network or other network, because the Calling Side calling control flow is consistent with existing procedure, therefore, Fig. 3 and Fig. 4 only show the calling release control procedure of callee side.Describe under the caller control mode below in conjunction with Fig. 3 and Fig. 4 and to call out releasing control method.
Step 1-5, call establishment:
Calling conversation control unit or Service Control Unit are received the setup requests from caller, content (as caller and called number) and calling according to this call request discharge control table, the release control mode of determining this calling is the caller control mode, the caller control mode of determining is forwarded to called sip user agent node, called sip user agent node send ring to called user terminal, behind user's off-hook, call setup.
The processing procedure of step 6, Called Onhook:
Behind the call setup, if Called Onhook, because this calling is the caller control mode, the sip user agent node starts calling and discharges control timer, and calling still keeps and is not released.
The processing procedure of step 7, called off-hook:
Calling out the release control timer in the time, called off-hook, called can the conversation with the caller maintenance.The calling that the sip user agent node will be called out discharges the control timer zero clearing.
The processing procedure of step 8-13, The Calling Party Hooks On call release:
In called not on-hook, perhaps the calling behind the Called Onhook discharges in the control timer, and The Calling Party Hooks On, and calling conversation control unit will be received the call release request from caller, and this call release request is routed to called sip user agent node; After called sip user agent node is received call release request, to call out the zero clearing of release control timer, and discharge this time and call out, and give the called prompt tone that send, send simultaneously and call out the release response to calling conversation control unit, calling conversation control unit sends to call out to discharge to caller and responds.
Step 14-19, the processing procedure of calling out the overtime call release of release control timer:
Under the situation of Called Onhook, after calling release control timer is overtime, the sip user agent node will be called out and discharge the control timer zero clearing, and send BYE message to calling conversation control unit, discharge this time and call out, calling conversation control unit discharges request to the Calling Side forwarded call; Calling conversation control unit receives that the calling of Calling Side discharges response, is forwarded to called sip user agent node.
2, called control mode
Fig. 5 and Fig. 6 show the call flow under the called control mode situation.In this flow process, its callee side user can be from this PSTN analogue system, also can be from other PSTN analogue system or PSTN network or other network, because the callee side calling control flow is consistent with existing procedure, therefore, Fig. 5 and Fig. 6 only show the calling calling release control procedure of Calling Side.Describe under the called control mode below in conjunction with Fig. 5 and Fig. 6 and to call out releasing control method.
Step 301-304, calling subscriber's off-hook, dialing, caller sip user agent node sends a call request to calling conversation control unit or Service Control Unit, calling conversation control unit or Service Control Unit according to the content of this call request (as caller and/draw called number) and call out the release control table, the release control mode of determining this calling is called control mode, calling conversation control unit is to the called request of making a call, after the called response, and call setup; The called control mode that to determine of calling conversation control unit or Service Control Unit is issued caller sip user agent node then.
Step 305, the processing procedure that The Calling Party Hooks On:
Behind the call setup, if The Calling Party Hooks On, because the release control mode of this calling is called control mode, caller sip user agent node starts calls out the release control timer, and calling still keeps and is not released.
The processing procedure of step 306, caller off-hook:
Calling out the release control timer in the time, the caller off-hook, caller can be conversed with called maintenance.The calling that the sip user agent node will be called out discharges the control timer zero clearing.
The processing procedure of step 307-312, Called Onhook call release:
In not on-hook of caller, calling after perhaps The Calling Party Hooks On discharges in the control timer, Called Onhook, the calling Session Control Unit will be received from called call release request, and this call release request is forwarded to the calling service control unit, Service Control Unit is routed to caller sip user agent node with call release request by calling conversation control unit; After caller sip user agent node is received call release request, to call out the zero clearing of release control timer, and discharge this time and call out, and send prompt tone to caller, send simultaneously and call out the release response to calling conversation control unit, calling conversation control unit is called out to called transmission and is discharged response.
Step 313-318, the processing procedure of calling out the overtime call release of release control timer:
Under the situation that The Calling Party Hooks On, after calling release control timer is overtime, caller sip user agent node will be called out and discharge the control timer zero clearing, and to calling Session Control Unit transmission BYE message, call out so that discharge this time, the calling Session Control Unit discharges request to the callee side forwarded call; The calling Session Control Unit receives that the calling of callee side discharges response, will call out then to discharge to respond to be forwarded to caller sip user agent node.
3, the realization flow of both sides' control:
When calling release control mode was both sides' control mode, the sip user agent node discharged this calling according to the control of both sides' control mode.In the sip user agent node, be provided with to call out and discharge control timer.Calling when describing both sides' control mode in detail below discharges control flow.
Behind the call setup, when the call subscriber terminal on-hook, call subscriber terminal sends onhook event to the sip user agent node; After the sip user agent node is received the onhook event of call subscriber terminal transmission, start and call out the release control timer.
The sip user agent node discharges control timer according to call subscriber terminal onhook event controlling call.Receive the off-hook event of call subscriber terminal when the sip user agent node after, it is invalid that the sip user agent node makes calling discharge control timer, and recover this conversation; Receive the onhook event of call subscriber terminal and/or called user terminal when the sip user agent node after, start and call out the release control timer.
The sip user agent node is according to call out discharging whether overtime control call release of control timer.When calling release control timer was overtime, the sip user agent node discharged this calling; When calling release control timer was not overtime, the sip user agent node kept this calling.
Behind the call setup, when the called user terminal on-hook, called user terminal sends onhook event to the sip user agent node; After the sip user agent node is received the onhook event of called user terminal transmission, start and call out the release control timer.
The sip user agent node discharges control timer according to the onhook event controlling call of called user terminal.After the sip user agent node was received the off-hook event of called user terminal, it is invalid that the sip user agent node makes calling discharge control timer, and recover this conversation;
The sip user agent node is according to call out discharging whether overtime control call release of control timer.When calling release control timer was overtime, the sip user agent node discharged this calling; When calling release control timer was not overtime, the sip user agent node kept this calling.
4, the realization flow of not controlling mutually
Behind the call setup, when the call subscriber terminal on-hook, call subscriber terminal sends onhook event to the sip user agent node; After the sip user agent node was received the onhook event of call subscriber terminal transmission, the sip user agent node discharged this calling.
When the called user terminal on-hook, called user terminal sends onhook event to the sip user agent node; After the sip user agent node was received the onhook event of called user terminal transmission, the sip user agent node discharged this calling.
Therefore, according to the present invention, the present invention can provide mutually and not control, and caller control, called control and caller/called both sides control release control system.Thereby can adapt to multiple demand, such as urgent call the called control that just needs.
Though described the present invention by embodiment, those of ordinary skills know, without departing from the spirit and substance in the present invention, just can make the present invention that many distortion and variation are arranged, and scope of the present invention is limited to the appended claims.
Claims (16)
1. call release control system, described call release control system comprise Session initiation Protocol sip user agent node, call out and discharge control mode determining unit and user terminal, it is characterized in that,
Described user terminal is used to produce off-hook and/or onhook event;
Described calling discharges the control mode determining unit and is used for according to call request and calls out discharging the calling release control mode that this calling is determined in control table;
Described user agent's node is used for calling out release control according to calling out the off-hook and/or the onhook event that discharge control mode and user terminal;
Wherein, described calling release control mode is divided according to the controlling party of call release.
2. call release control system according to claim 1 is characterized in that, described calling discharges the control mode determining unit and is positioned on sip user agent node, Service Control Unit, the calling conversation control unit, or as functional entity existence separately.
3. call release control system according to claim 1 is characterized in that, described calling discharges the control mode determining unit and comprises:
Call out the release control table, it comprises user terminal number and calls out the release control mode;
Judging unit is used for according to call request and calls out discharging the calling release control mode that this calling is determined in control table.
4. call release control system according to claim 1 is characterized in that, described sip user agent node comprises:
Receiving element is used to receive off-hook, the onhook event of user terminal, and receipt of call discharges the calling that the control mode determining unit determines and discharges control mode;
Processing unit is used for determining whether discharging this calling according to calling out the off-hook, the onhook event that discharge control mode and user terminal;
Transmitting element is used for the handled result of processing unit is issued the sip user agent node of opposite side.
5. call release control system according to claim 4 is characterized in that, described sip user agent node also comprises:
Call out the release control timer, be used to determine this to call out the time that after the on-hook of Be Controlled side, is continued.
6. call out releasing control method for one kind, it is characterized in that, comprising:
The calling that A, sip user agent node obtain this calling discharges control mode, and described calling discharges control mode and determines that according to this call request and calling release control table user terminal produces off-hook/onhook event;
B, sip user agent node are called out release control according to calling out release control mode and off-hook/onhook event;
Wherein, described calling release control mode is divided according to the controlling party of call release.
7. calling releasing control method according to claim 6 is characterized in that, described calling discharges control mode and comprises mutually not control mode, caller control mode, called control mode and both sides' control mode.
8. calling releasing control method according to claim 7, it is characterized in that, when call out discharging control mode for mutually not during control mode, described step B specifically comprises: when the sip user agent node was received the user terminal onhook event, the sip user agent node discharged this calling.
9. calling releasing control method according to claim 7 is characterized in that, when calling release control mode was the caller control mode, described step B further comprised:
B1, when the sip user agent node is received present networks call subscriber terminal onhook event, the sip user agent node discharges this calling;
B2, when the sip user agent node is received present networks called user terminal onhook event, the sip user agent node discharges this calling according to caller control mode control.
10. calling releasing control method according to claim 9 is characterized in that, described step B2 further comprises:
B21, called user terminal send onhook event to the sip user agent node;
After B22, sip user agent node are received the onhook event of called user terminal transmission, start and call out the release control timer;
B23, call out discharging control timer in the time, if the sip user agent node is received the off-hook event of called user terminal, then will call out the zero clearing of release control timer;
B24, control timer is overtime when call out discharging, sip user agent node call release.
11. calling releasing control method according to claim 7 is characterized in that, when calling release control mode was called control mode, described step B further comprised:
B3, when the called user terminal on-hook in the present networks, the sip user agent node discharges this calling;
B4, when the call subscriber terminal on-hook in the present networks, the sip user agent node discharges this calling according to the control of called control mode.
12. calling releasing control method according to claim 11 is characterized in that, described step B4 further comprises:
B41, call subscriber terminal send onhook event to the sip user agent node;
After B42, sip user agent node are received the onhook event of call subscriber terminal transmission, start and call out the release control timer;
B43, call out discharging control timer in the time, if the sip user agent node is received the off-hook event of call subscriber terminal, then will call out the zero clearing of release control timer;
B44, control timer is overtime when call out discharging, sip user agent node call release.
13. calling releasing control method according to claim 7 is characterized in that, when calling release control mode was both sides' control mode, described step B further comprised:
B5, when call subscriber terminal in the present networks and/or called user terminal on-hook, the sip user agent node discharges this calling according to both sides' control mode control.
14. calling releasing control method according to claim 13 is characterized in that, described step B5 further comprises:
B51, call subscriber terminal and/or called user terminal send onhook event to the sip user agent node;
After B52, sip user agent node are received the onhook event of call subscriber terminal and/or called user terminal transmission, start and call out the release control timer;
B53, call out discharging control timer in the time, if the sip user agent node is received the off-hook event of call subscriber terminal and/or called user terminal, then will call out the zero clearing of release control timer;
B54, control timer is overtime when call out discharging, sip user agent node call release.
15., it is characterized in that whether overtime control call release further comprises described sip user agent node according to calling out the release control timer according to claim 10,12 or 14 described calling releasing control methods:
When calling release control timer was overtime, the sip user agent node discharged this calling;
When calling release control timer was not overtime, the sip user agent node kept this calling.
16. calling releasing control method according to claim 6 is characterized in that, the calling release control mode that described sip user agent node obtains this calling specifically comprises:
Call out and discharge the definite release control mode of calling out of control mode determining unit; And the calling that will determine release control mode is issued the sip user agent node.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100568161A CN100421531C (en) | 2006-03-07 | 2006-03-07 | Call release control system and call release control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100568161A CN100421531C (en) | 2006-03-07 | 2006-03-07 | Call release control system and call release control method |
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| CN1870827A CN1870827A (en) | 2006-11-29 |
| CN100421531C true CN100421531C (en) | 2008-09-24 |
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| CNB2006100568161A Expired - Fee Related CN100421531C (en) | 2006-03-07 | 2006-03-07 | Call release control system and call release control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101212520B (en) * | 2006-12-29 | 2010-05-26 | ***通信集团公司 | Emergency call handling method and system |
| CN101304605B (en) * | 2007-05-10 | 2011-06-22 | 中兴通讯股份有限公司 | Method for implementing reanswer call |
| CN102769804B (en) * | 2011-05-03 | 2015-03-11 | 华为技术有限公司 | Realization method of call control as well as switchboard and call control system |
| CN104184715B (en) * | 2013-05-27 | 2018-07-06 | 南京中兴软件有限责任公司 | Sip terminal and its call method, VoIP audio communication methods |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149376A (en) * | 1994-05-27 | 1997-05-07 | 英国电讯公司 | Connection release in a telecommunications system |
| KR20010048639A (en) * | 1999-11-29 | 2001-06-15 | 윤종용 | Method for waitng an incomming call in wireless communication set |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149376A (en) * | 1994-05-27 | 1997-05-07 | 英国电讯公司 | Connection release in a telecommunications system |
| KR20010048639A (en) * | 1999-11-29 | 2001-06-15 | 윤종용 | Method for waitng an incomming call in wireless communication set |
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| CN1870827A (en) | 2006-11-29 |
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