CN100521813C - Method and system for processing network recognition emergent conversation - Google Patents
Method and system for processing network recognition emergent conversation Download PDFInfo
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- CN100521813C CN100521813C CNB2005100999577A CN200510099957A CN100521813C CN 100521813 C CN100521813 C CN 100521813C CN B2005100999577 A CNB2005100999577 A CN B2005100999577A CN 200510099957 A CN200510099957 A CN 200510099957A CN 100521813 C CN100521813 C CN 100521813C
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Abstract
The invention relates to a method for building the urgent conversation in the communication system and its relative system comprises at least one user device and one or several network entities relative to building one urgent conversation. When the user device transmits the indicating identification character as calling number or the logic name of called entity to the network entity to initiate the conversation, one said network entity analyzes the received identification character. When the initiated conversation is detected as an urgent conversation, feeding the information to the user device to inform the latter one that the initiated conversation is a urgent conversation. So the user device starts the operation of urgent conversation. In addition, event the user device can detect the expected conversation is the urgent conversation by itself, the network can inform the user device the relative information to assure the correct operation.
Description
The application be the applying date be April 27 calendar year 2001 day, be called the dividing an application of Chinese patent application NO.01823175.6 (international application no PCT/EP01/04830) of the method and system of emergent session " handle Network Recognition ".
Technical field
Relate generally to emergent session of the present invention, for example connection of urgent call.
Background technology
In IP multi-media network (IMS), should support urgent call.In initial session is provided with (for example, in the invitation message of SIP), it is an emergent session that UE (subscriber equipment) can indicate session usually.
Yet, have this situation, wherein initial session is provided with message only with common number transmission, and does not have the indication about emergency.This situation may take place when for example the user is just in another IMS netsurfing.
The emergent session of identification expection is very important as quickly as possible, because will carry out emergent session, network and subscriber equipment need be carried out some special actions.
Summary of the invention
The invention provides network element, subscriber equipment, and method and system for emergent session can be set up with reliable fashion.
According to an aspect of the present invention, a kind of network entity is provided, be applicable to: receive a message so that initiation session from subscriber equipment, described message indicates the identifier of called unit, the identifier that analysis receives, and when detecting the session that to initiate and be emergent session, send information, so that the session that notifying user equipment is initiated is an emergent session to subscriber equipment.
According to another aspect of the present invention, a kind of subscriber equipment is provided, be applicable to: send message so that initiation session to network entity, this message indicates the identifier of called unit, when the session that will initiate is emergent session, receiving the session of initiating to notification of user equipment from network entity is the information of emergent session, and receiving when the session of notification of user equipment initiation is the described information of emergent session, starts the execution of emergent session.
According to another aspect of the present invention, a kind of method of initiating emergent session in communication system is provided, described communication system comprises at least one subscriber equipment and one or more network element of setting up emergent session that relates to, wherein, when a network element receives an indication called party's the message of identifier so that during initiation session from described subscriber equipment, described network element, the identifier that described network element analysis receives, and when detecting the session that to initiate and be emergent session, send information to subscriber equipment, the session of initiating with notifying user equipment is an emergent session.
According to another aspect of the present invention, a kind of method of initiating emergent session in communication system is provided, described communication system comprises at least one subscriber equipment, at least one relates to the calling Control Network unit of setting up emergent session, with urgent center, wherein, when calling out the message of identifier that the Control Network unit receives the indication called party from described subscriber equipment with initiation session, call out the identifier that the Control Network element analysis receives, and when detecting the session that to initiate and be emergent session, network element send information to urgent center or to intermediate network elements to forward information to urgent center, described information is notified the information of the relevant emergent session that will set up in urgent center, send the subscriber equipment that is indicated to of emergent session, the session of being initiated with notifying user equipment is an emergent session.
According to another aspect of the present invention, a kind of communication system that is used to set up emergent session is provided, this communication system comprises at least one subscriber equipment and one or more network element of setting up emergent session that relates to, wherein said subscriber equipment is suitable for coming initiation session by the message of the identifier that sends the indication called party to network element, a described network element is suitable for analyzing the identifier that receives, when detecting the session that to initiate and be emergent session, described phase-split network unit or another network element are suitable for sending information to subscriber equipment, are emergent sessions with the session of notifying the latter to be initiated.
According to another aspect of the present invention, a kind of communication system that is used to set up emergent session is provided, described communication system comprises at least one subscriber equipment, at least one relates to the calling Control Network unit of setting up emergent session, with urgent center, wherein, when the message of the identifier of described subscriber equipment by sending the indication called party to calling Control Network unit during with initiation session, call out the Control Network unit and be suitable for analyzing the identifier that receives, and when detecting the session that to initiate and be emergent session, send information to urgent center or to intermediate network elements to forward information to urgent center, described information is notified the information of the relevant emergent session that will set up in urgent center, send the subscriber equipment that is indicated to of emergent session, the session of being initiated with notifying user equipment is an emergent session.
The invention discloses related network and how to detect an emergent session, how can notifying user equipment about detecting the information of emergent session, and this information how to after session the setting device and the function that exert an influence.
The present invention especially provides the Network Recognition of session being initiated the emergent session of entity initiation, and it for example is the subscriber equipment (UE) that comprises mobile or fixed station or terminal or the like that entity is initiated in described session.
Even when subscriber equipment can not self detect initiation session and is an emergent session, it also can be by fast notification, and can initiate proper step afterwards to set up emergent session.
According to the first embodiment of the present invention, guarantee resource in order to give urgent call in transport layer, after control device (for example P-CSCF) had found that this session is emergent session, return response was given subscriber equipment immediately.When subscriber equipment receives such replying, it will carry out normal emergent session process, and will be for example defined in the 3GPP standard.For example, for implementing normal emergent session, subscriber equipment can obtain or inquiring position information and send this information in invitation message, and subscriber equipment also can activate packet data protocol (PDP) context of this emergent session.
The present invention allows to find as quickly as possible that session is an emergent session, makes network and subscriber equipment to carry out necessary special action for emergent session as quickly as possible.
In an optional embodiment of the present invention, (for example P-CSCF) receives invitation message from subscriber equipment when controlled entity, but wait for from urgent center or go-between entity reception message (for example 183 sessions are carried out), and when this message increases emergence message, not immediate answer of controlled entity subscriber equipment.
The information relevant with urgent call is not delayed, and call setup is proceeded with tradition or other any modes of for example carrying out message by 183 sessions.
Send invitation message and use considerable Radio Resource, preferably do not send a plurality of invitation message.In fact do not postpone in session is set up, because before subscriber equipment receives SDP message, subscriber equipment does not also begin to create second PDP Context.In other words, can comprise indication according to high priority at user's level (user plane).If do not indicate urgent center, can select the default urgency center.
The present invention relates to a kind of situation, wherein do not carry out PDP context activation, but send message (for example invitation message) to CSCF from subscriber equipment earlier because of a variety of causes can not or will not produce.
Can understand other details of the present invention, aspect and advantage with specific embodiment with reference to the accompanying drawings.
Description of drawings
Fig. 1 shows first embodiment according to method and system of the present invention;
Fig. 2 shows second embodiment according to method and system of the present invention;
Fig. 3 shows the 3rd embodiment according to method and system of the present invention;
Fig. 4 shows the realization that emergent session is handled in normal conditions.
Embodiment
The invention discloses solution to following problem:
-after the information of notifying user equipment about session characteristics, subscriber equipment can activate urgent PDP Context.This is very important for obtain high priority for PDP Context in GPRS (GPRS) and RAN (Radio Access Network).
-after the information of notifying user equipment about session characteristics, subscriber equipment sends positional information (supposition does not send positional information in each invitation message).Positional information is used to select optimal urgent center (EC).
Fig. 1 shows embodiments of the invention, it comprises the calling generation unit, be that unit (as mobile radio station (UE) 10) is initiated in session, with comprise the service network unit (network of for example Serving GPRS Support Node (SGSN), and control unit (for example CSCF (CSCF) or agent call State Control function (P-CSCF) 11).Finish other required network element of IP multimedia session, termination unit for example, gateway node (as needs), for example user profile register of attaching position register (HLR) or home subscriber server (HSS) or the like is known to those skilled in the art, therefore neither illustrates also not illustrate in greater detail.Usually, MSC (mobile switching centre does not illustrate) can return to the subscriber equipment calling and carry out message, and this message comprises the precedence information field that also defines EC (urgent center).
More than all or among the embodiment of following explanation, subscriber equipment 1 can be furnished with USIM (user serves identification module).
At Fig. 1, the embodiment shown in 2 and 3 relates to the Network Recognition emergent session.
The solution that guarantees the resource of execution urgent call in transport layer is at network entity, after for example control device (for example P-CSCF 11) has been found that session is emergent session, to respond subscriber equipment 10 immediately.Reply when subscriber equipment 10 receives, when promptly the session of being initiated by the network notice is emergent session, subscriber equipment 10 will be carried out normal emergent session process, for example defined process in the 3GPP standard.
Fig. 1 shows solution on the whole.
In step 1, subscriber equipment 10 sends the conversation initialization message, and for example SIP's (conversation initialized protocol) invites message to P-CSCF 11, this message indicator identifiers, for example E.164 number of calling entity or LN (logical name).
In step 2, P-CSCF 11 analyzes number or logical name.When detect initiation be normal conversation the time, continue normal connection procedure.Yet when P-CSCF 11 finds that calling is urgent call, carry out step 3 shown in Figure 1 to step 6.
In step 3, send an acknowledgement to subscriber equipment 10, indicating this session is emergent session.
Step 4: subscriber equipment 10 returns acknowledge message ACK to P-CSCF 11.
In optional step 5, it is emergent session that subscriber equipment 10 can be notified user conversation, for example by show suitable message on the display of subscriber equipment 10.
Then, shown in step 6, carry out (finishing) normal emergent session.Carry out normal emergent session and represent that subscriber equipment 10 can for example obtain positional information, and in invitation message, send this information, and expression subscriber equipment 10 is with the urgent PDP Context of active session.
The response message of step 3 can be a new information, or already present sip message, also can use other known message.Information in the response message can be the new argument of Session Initiation Protocol, but also can use existing parameter.
Fig. 2 shows a scheme, and wherein in step 3, SIP 302 message " temporarily remove " to be used as replys.It is emergent session that parameter value in 302 message is indicated this session.For example, parameter can be " contact: sip:emergency@visited.cscf.com ".New when inviting message to P-CSCF 11 when sending, or subscriber equipment 10 has been when just having generated the new request message with emergent session indication, and this numerical value can for example be used among the SIP URI.Another possibility can be to use the SIP Notification Method.
Except above discussion, the embodiment shown in Fig. 2 has the 26S Proteasome Structure and Function the same with the embodiment of Fig. 1.
Fig. 3 has illustrated another embodiment of the present invention.Except that subscriber equipment 10 and P-CSCF 11, show serving CSCF (S-CSCF) 12 and urgent center (EC) 13.Compare with the embodiment of Fig. 1 and 2, provide optional function according to the embodiment of Fig. 3.
In order to realize the foundation of session very fast, after P-CSCF 11 found that sessions are emergent session, P-CSCF 11 did not respond subscriber equipment 10 immediately.On the contrary, its continues session and sets up, and selectively (if possible), and P-CSCF 11 increases being indicated in the message that is generated by P-CSCF 11 of emergent sessions, to guarantee the high priority of Message Processing.
Fig. 3 shows the details of process.Consider the character of emergent session, being desirably in very much can not increase any additional delay yet and set up process to session under the abnormal conditions.By using the optional mode of Fig. 3, can avoid transmitting another invitation message on the interface aloft, this message perhaps is maximum and the slowest message, and therefore consumes a lot of times.
Preferably include the indication of emergent session to the response message of subscriber equipment 10 (in SIP, preferably " 183 carry out " message).This allows the urgent PDP Context of active session.
If in S-CSCF 12 (or associated server), should not exist in order to select the positional information at urgent center 13, S-CSCF 12 (or associated server) can not have (for example to select urgent center 13 under the situation of user position information, it selects the urgent center of acquiescence, nearest urgent center, maybe can use some other the urgent center of the choice of technology, for example according to the address of P-CSCF 11).
As shown in Figure 3, in step 1, subscriber equipment 10 initiation session are set up and are sent session and message (for example, invitation message) are set to P-CSCF 11.P-CSCF 11 analyzes and in session the number or the logical name (LN) of the callee/entity of indicating in the message is set, and finds that this calling is urgent call.P-CSCF 11 can increase emergent session and be indicated to (can also increase this emergent session by other unit is indicated in the invitation message) in the invitation message.
In step 2, transmit and invite message to S-CSCF 12.
In step 3, S-CSCF 12 selects urgent center (EC) 13 and transmits to invite message to EC 13.
Step 4:EC 13 is by echo reply, and for example SIP 183 " session is carried out " is to S-CSCF 12, and request is invited in response.The subclass of the Media Stream shown in the step 4 to 6 shows that message is sent back to and is used for the EC 13 that suggestion provides support, or the initiation end points of request emergent session.
Step 5:S-CSCF 12 transmits and replys, and for example SIP 183 " session is carried out " gets back to P-CSCF 11.
Step 6:P-CSCF 11 transmits and replys, and for example SIP 183 " session is carried out " gets back to subscriber equipment 10.Reply the indication that comprises emergent session.So it is emergent session that subscriber equipment 10 is known this session, and can suitably move.
Circle shown in Figure 3 and ellipse representation " detect urgent call, can increase urgent indication ".
Fig. 4 provides the suggestion of carrying out the foundation of normal emergent session under subscriber equipment has the situation of USIM.Suppose that subscriber equipment has activated the signaling PDP Context at GGSN among the visit PLMN.
Below, with reference to the number of steps of figure 4, the step shown in more detailed description Fig. 4.
1. subscriber equipment can be asked SAI (coverage sign) to SGSN.
2.SGSN send response message to subscriber equipment.
3. subscriber equipment sends the SIP comprise initial SDP and asks to find the P-CSCF that mechanism is definite by CSCF.In invitation message, send the information of relevant urgent call.Subscriber equipment comprises positional information in invitation message.
4.P-CSCF use the information in invitation message, for example number by analysis request or logical name detect that to call out be urgent call.P-CSCF selects S-CSCF and transmits the SIP comprise about the information of urgent call and ask S-CSCF in the network of being visited.
5.S-CSCF use location information is to select suitable EC.S-CSCF forwards the request to EC.
6. return the Media Stream ability of target along signaling paths.
Arrive P-CSCF 7.S-CSCF transmit the message that includes target SDP ability.
8.P-CSCF authorize the required resource of this session.
9.P-CSCF transmit SDP message to origin endpoint.
10. subscriber equipment is determined the final Media Stream setting of this session, and sends final SDP to P-CSCF.
11.P-CSCF transmit final SDP to S-CSCF.
12.S-CSCF transmit this message to EC.
13. activate the PDP Context request.Subscriber equipment activates auxiliary PDP Context request message to SGSN by sending, and activates the PDP Context of emergent session.Subscriber equipment points out that this PDP Context is used for emergent session.For PDP Context, distribution/maintenance priority should be set to high numerical value immediately.
14. when this PDP Context of identification is when being used for emergent session, in order to receive renewal or more accurate position information about subscriber equipment, SGSN can self to the SRNC request position information.Send position message to gateway mobile location service centre (GMLC) (as defined in TS 23.271) after the SGSN, and EC can obtain this positional information from GMLC.
15. radio access bearer setting
16. generate the PDP Context request
17. generating PDP Context replys
18. activating PDP Context accepts
19. by the signaling paths of being set up by invitation message, subscriber equipment sends " resource keeps successfully " message to the termination end points.
20.P-CSCF transmit this message to S-CSCF.
21.S-CSCF transmit this message to EC.
22. successful reservation of resource.
23.EC the information that sends relevant warning is to S-CSCF.
24.S-CSCF transmit ALERTING message to P-CSCF.
25.P-CSCF transmit this message to subscriber equipment.
26.EC answer calls also sends 200 final OK message to P-CSCF.
27.S-CSCF transmit 200 final OK message to P-CSCF.
28.P-CSCF point out to have agreed now session resources reserved for this reason.
29.P-CSCF transmit 200 final OK message to subscriber equipment.
30. subscriber equipment starts the Media Stream of this session.
31. calling party responds 200 OK to have finally replying of the SIP ACK message that sends to P-CSCF.
32.P-CSCF transmit SIP ACK message to S-CSCF
33.S-CSCF transmit ACK message to EC.
Although the present invention is illustrated with reference to specific embodiment in the above, yet protection scope of the present invention should cover all changes of disclosed feature, omits, and increases and correction.
Of the present invention be taught in the complete IP network implemented preferably, but also can be applied in the diverse network of other types, i.e. IM is in GPRS and the UMTS field.
Claims (13)
1. network entity comprises:
Be suitable for receiving a message so that the device of initiation session from subscriber equipment, described message indicates the identifier of called unit,
Be suitable for analyzing the device of the identifier that receives, and
Be suitable for when detecting the session that to initiate and be emergent session, sending information, so that the session that notifying user equipment is initiated is the device of emergent session to subscriber equipment.
2. network entity as claimed in claim 1, the described information that wherein sends to subscriber equipment is a piece of news, this message comprises indicating and will be addressed so that set up the parameter of address of the network entity of emergent session.
3. network implementation as claimed in claim 1 is stopped, and wherein the identifier of called unit is the call number or the logical name of called unit.
4. network entity as claimed in claim 1, wherein when network entity detects the session that will initiate and is emergent session, the emergent session that will set up to urgent center notice, and and if only if from urgent center receive reply after, described information is turned back to subscriber equipment.
5. network entity as claimed in claim 1, wherein this network entity is the equipment that is used to carry out CSCF.
6. network entity as claimed in claim 1 is a conversation initialization protocol message to the information that subscriber equipment sends wherein, and it comprises indicating and will be addressed so that set up the parameter of address of the network entity of emergent session.
7. subscriber equipment comprises:
Be suitable for sending message so that the device of initiation session to network entity, this message indicates the identifier of called unit,
Be suitable for when the session that will initiate is emergent session, receiving the session of initiating to notification of user equipment from network entity is the device of the information of emergent session, and
Be suitable for receiving when the session of notification of user equipment initiation is the described information of emergent session, start the device of the execution of emergent session.
8. subscriber equipment as claimed in claim 7, wherein the execution of emergent session comprises the step of the positional information that obtains subscriber equipment and sends the step of described positional information to a network entity.
9. subscriber equipment as claimed in claim 7, wherein the execution of emergent session comprises the step of urgent minute knob data protocol contexts of active session.
10. subscriber equipment as claimed in claim 7, wherein said information is a piece of news, this message comprises indicating and will be addressed so that set up the parameter of address of the network entity of emergent session.
11. subscriber equipment as claimed in claim 7, wherein the identifier of called unit is the call number or the logical name of called unit.
12. subscriber equipment as claimed in claim 7, wherein this subscriber equipment is applicable to that the session of initiating to user notification is an emergent session.
13. subscriber equipment as claimed in claim 7, wherein said information is conversation initialization protocol message, and it comprises indicating and will be addressed so that set up the parameter of address of the network entity of emergent session.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100999577A CN100521813C (en) | 2001-04-27 | 2001-04-27 | Method and system for processing network recognition emergent conversation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100999577A CN100521813C (en) | 2001-04-27 | 2001-04-27 | Method and system for processing network recognition emergent conversation |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB018231756A Division CN1282390C (en) | 2001-04-27 | 2001-04-27 | Method and system for handling a network-identified emergency session |
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| Publication Number | Publication Date |
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| CN1738484A CN1738484A (en) | 2006-02-22 |
| CN100521813C true CN100521813C (en) | 2009-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100999577A Expired - Lifetime CN100521813C (en) | 2001-04-27 | 2001-04-27 | Method and system for processing network recognition emergent conversation |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100579278C (en) * | 2006-03-03 | 2010-01-06 | 华为技术有限公司 | Emergent calling method and system and calling conversation control function entity |
| DE102006019719A1 (en) * | 2006-04-27 | 2007-10-31 | Siemens Ag | Emergency call connection installing method, involves avoiding emergency call connection on Internet protocol multimedia system registration of equipment at system for emergency call connection, if equipment is already registered at system |
| CN101500213B (en) * | 2008-02-03 | 2011-04-20 | 华为技术有限公司 | Method, equipment and system for user equipment urgent access |
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