CN101997847A - Method and system for realizing service continuity in the case of switching circuit switch multi-session to packet switch - Google Patents
Method and system for realizing service continuity in the case of switching circuit switch multi-session to packet switch Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000011664 signaling Effects 0.000 description 14
- 230000008569 process Effects 0.000 description 10
- 238000012546 transfer Methods 0.000 description 8
- 230000004913 activation Effects 0.000 description 6
- 230000000977 initiatory effect Effects 0.000 description 6
- 230000004044 response Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
- H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
- H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
- H04W36/00226—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB] wherein the core network technologies comprise IP multimedia system [IMS], e.g. single radio voice call continuity [SRVCC]
Abstract
The invention discloses a method and system for realizing service continuity in the case of switching circuit switch multi-session to packet switch, in order to avoid disorder at a switched session far end. The method comprises the following steps: UE (user equipment) sends the session state information on a UE circuit switch (CS) to a service continuity application server (SCC AS); and the SCC AS implements corresponding IP multimedia subsystem (IMS) service according to received session state information on the CS.
Description
Technical field
The present invention relates to the communications field, relate more specifically to business continuance (SC, Service Continuity) implementation method and system when the many sessions of circuit domain switch to packet domain in a kind of IP Multimedia System.
Background technology
IP (network interconnection agreement, Internet Protocol, be called for short IP) IP multimedia subsystem, IMS (IP MultimediaCore Network Subsystem, be called for short IMS) be by third generation partner program (3rd GenerationPartnership Project, abbreviation 3GPP) a kind of IP-based network framework that proposes, made up one opening and service environment flexibly, supporting multimedia application can provide abundant multimedia service for the user.
In the IMS business system, key-course separates with operation layer, and key-course does not provide concrete business, and functions such as necessary triggering, route, charging only are provided to operation layer.Professional triggering and controlled function are CSCF (Call Session Control Function in the key-course, be called for short CSCF, be divided into and act on behalf of Proxy, inquiry Interrogating and serve three types of Serving, that wherein take the main responsibility is Serving, the Interrogating type is optional) finish, operation layer is by a series of application servers (Application Server, be called for short AS) form, concrete business service can be provided, AS can be an independent entity, also may reside among the S-CSCF.Key-course (S-CSCF) calls the business on the AS according to user's professional triggering of CAMEL-Subscription-Information control, realizes business function.End-to-end equipment in the session is called user equipment (UE) (User Equipment), be responsible for mutual with the user, the UE that has has the mode of multiple access network, comprise packet-switched domain (PS, Packet Switch are called for short packet domain) access network by 3GPP, packet-switched domain access network by other non-3GPP, even can be by circuit switching (CS, Circuit Switch are called for short circuit domain) territory access network etc.It is by (the Mobile Switch Center of mobile switching centre that the IMS network is inserted in traditional CS territory, MSC) by public exchange communication network (Public Switch Telecommunication Network, PSTN) (Multimedia Gateway MGW) realizes the media gateway of access IMS network.
For UE with plurality of access modes, no matter it can use plurality of access modes simultaneously still is that certain only uses a kind of access way constantly, if it is carrying out a certain business under a kind of access way, such as conversation, other are local and when needing to change the access way of using when UE moves to, the business that UE and network can provide certain mode that UE is being carried out is not interrupted, we are referred to as business continuance such ability, realize that the application server of business continuance becomes business continuance application server (SCCAS).
Fig. 1 is the business continuance schematic diagram, signaling paths and media path that UE-1 and UE-2 set up session have been described, and behind the generation business continuance, the signaling paths of UE-1 and UE-2 and media path, be simplicity of illustration and description, S-CSCF and business continuance AS (SCC AS) are drawn as an entity, use the Session Initiation Protocol communication of standard between the two.
Business continuance has been set up session between UE-1 and UE-2 before taking place, and its signaling paths is described below:
Signaling paths between A102, UE-1 and the MGW, the signaling protocol by the CS territory communicates with one another, and for SC AS, this is access end (Access leg) path;
Signaling paths between A104, MGW and the SCC AS/S-CSCF, the Session Initiation Protocol by IMS communicates with one another, and for SC AS, this also belongs to access end (Access leg) path;
Signaling paths between R101, SC AS/S-CSCF and the UE-2, the Session Initiation Protocol by IMS communicates with one another, and for SC AS, this is far-end (Remote leg) path;
After business continuance took place, variation had all taken place in signaling paths between UE-1 and UE-2 and media path, and wherein the variation of signaling paths is described below:
Signaling paths between A112, UE-1 and the P-CSCF, the Session Initiation Protocol by IMS communicates with one another, and for SC AS, this is access end (Access leg) path;
Signaling paths between A114, P-CSCF and the SC AS/S-CSCF, the Session Initiation Protocol by IMS communicates with one another, and for SC AS, this also belongs to access end (Access leg) path;
Signaling paths between R101, SCC AS/S-CSCF and the UE-2, the Session Initiation Protocol by IMS communicates with one another, and for SC AS, this is far-end (Remote leg) path, and after business continuance took place, this far end path did not change.
With figure below is to simplify flow process to describe, and SCC AS and CSCF are combined into an entity description.
Fig. 2 is existing C S territory multi-conversation business continuity realization flow figure, described UE A and set up conversation respectively between CS territory and UE B, UE C, two sessions all are anchored into SCC AS, and UE A switches to the PS territory, how UE-A and network realize the successional process of multi-conversation business, and it is described below:
Step 201, UE A set up conversation with UE B earlier in the CS territory, conversation is set up with UE C in the back, the conversation medium are shared CS carrying between UE A and MSC, MSC sets up 2 CS carryings respectively by PSTN and MGW, MGW sets up IMS media links 1 and 2 with UE B and UE C respectively, the signaling paths of IMS part is by the grappling of SCC AS institute, UE A has kept with the session activation of UE C the session with UE B, but reason owing to PSTN, operation information fails to arrive MGW, SCC AS sees the IMS media links of 2 activation, and wherein UE C activates recently;
Step 202, UE A decision switch to the PS territory;
Step 203, UE A support many sessions to switch, and UE A initiates the IMS transfer request in the PS territory, and such as sending INVITE (invitation) message, target is the sign of SCC AS, and carries many sessions switching capability, and message travels CSCF arrives SCC AS;
Step 204, SCC AS receive 203 transfer request, select the session of the nearest activation of UE A, promptly with the session of UE C, upgrade;
Step 205, SCC AS initiate the IMS update request through CSCF to UE C, and such as sending reINVITE (heavily inviting) message, message travels CSCF arrives UE C;
Step 206, UE C agree to upgrade, and such as sending " 200OK " message, message travels CSCF arrives SCC AS;
Step 207, SCC AS send response message to UE A, and such as sending " 200OK " message, because UE A supports many sessions to switch, so carry the information of other IMS sessions of UE-A participation in the message body, message travels CSCF arrives UE A;
So far, UE A to newly-built IMS session, is about to the session updates of its activation to be put in the newly-built IMS session with the session of UE B, and the result is actual to be to converse with UE C.
The information of other sessions that step 208, UE A basis are received, send the request of new transfer and the session of UE B to SCC AS, such as sending INVITE, band is from the information of step 207 IMS session acquisition and UEB, and requiring to keep corresponding session, message travels CSCF arrives SCC AS;
Step 209, SCC AS process CSCF initiate update request to UE B, and require the medium of renewal to be in hold mode, such as sending reINVITE message, carry the maintenance sign;
Step 210, UE B agree to upgrade, and such as sending " 200OK " message, message travels CSCF arrives SCC AS;
Step 211, SCC AS send response message to UE A, and such as sending " 200OK " message, message travels CSCF arrives UE A;
So far, UE A to newly-built IMS session, is about to the session updates of its maintenance to be put in the newly-built IMS session with the session of UE C, and that the result keeps is UE B.
Existing C S territory multi-conversation business continuity implementation method is the situation of traditional MSC for MSC, make switch to the PS territory after, the session far-end generation entanglement of UE.
Summary of the invention
Business continuance implementation method and system when the technical problem to be solved in the present invention provides the many sessions of a kind of circuit domain and switches to packet domain, entanglement appears in the session far-end after avoiding switching.
For solving the problems of the technologies described above, business continuance implementation method when the invention provides the many sessions of a kind of circuit domain and switching to packet domain, described method is applicable to that UE switches to the session on it scene of packet-switched domain (PS) from circuit commutative field (CS), and described method comprises:
Described UE sends session state information on this UE CS territory to business continuance application server (SCC AS);
Described SCC AS carries out corresponding IP Multimedia System (IMS) business according to the session state information on the described CS territory of receiving.
Further, the step that described SCC AS carries out corresponding IMS business according to the session state information on the described CS territory of receiving further comprises: described SCC AS is according to the described session state information on the described CS territory, judge whether the business that UE participates in is MPTY, if, carry out the business of creating meeting and adding the member, otherwise carry out more new business of medium.
Further, the session state information on the described CS territory comprises the identification information of the far-end of active session.
Further, described SCC AS judges according to the number that belongs to the far-end of active session whether the business that described UE participates in is MPTY.
Further, the session state information on the described CS territory also comprises the identification information of the far-end that keeps session, and the business information of session.
Further, described SCC AS perhaps according to the number that belongs to the far-end of active session, judges whether the business that described UE participates in is MPTY according to the business information of described session.
For solving the problems of the technologies described above, the business continuance when the present invention also provides the many sessions of a kind of circuit domain to switch to packet domain is realized system, comprises subscriber equipment (UE) and business continuance application server (SCC AS), wherein:
Described UE is used for sending session state information on this UE CS territory to described SCC AS;
Described SCC AS is used for carrying out corresponding IP Multimedia System (IMS) business according to the session state information on the described CS territory of receiving.
Further, described SCC AS carries out corresponding IMS business according to the session state information on the described CS territory of receiving and is meant: described SCC AS is according to the described session state information on the described CS territory, judge whether the business that UE participates in is MPTY, if, carry out the business of creating meeting and adding the member, otherwise carry out more new business of medium.
Further, the session state information on the described CS territory comprises the identification information of the far-end of active session; Described SCC AS judges according to the number that belongs to the far-end of active session whether the business that described UE participates in is MPTY.
Further, the session state information on the described CS territory comprise the far-end of active session identification information, keep the identification information of the far-end of session, and the business information that participates in of session; Described SCC AS perhaps according to the number that belongs to the far-end of active session, judges whether the business that described UE participates in is MPTY according to the business information of described session.
Adopt the method for the invention, owing to have identical session state information between UE and SCC AS, thereby avoided entanglement occurring from the session far-end that circuit domain switches to after the packet domain.
Description of drawings
Fig. 1 is the business continuance schematic diagram;
Fig. 2 is existing C S multi-conversation business continuity realization flow figure;
Fig. 3 is CS multi-conversation business continuity realization flow Fig. 1 of the present invention;
Fig. 4 is CS multi-conversation business continuity realization flow Fig. 2 of the present invention.
Embodiment
Inventive concept of the present invention is: when having set up two above sessions on the UE or having set up at least one MPTY, UE switches to the session on it scene in PS territory from the CS territory, sends session state information on this UE CS territory to SCC AS; Described SCC AS carries out corresponding IMS business according to the session state information on the described CS territory of receiving.
The step that described SCC AS carries out corresponding IMS business according to the session state information on the described CS territory of receiving further comprises: described SCC AS is according to the described session state information on the described CS territory, judge whether the business that UE participates in is MPTY, if, carry out the business of creating meeting and adding the member, otherwise carry out more new business of medium.
Session state information on the CS territory can comprise the identification information of the far-end of active session.This moment, SCCAS judged according to the number that belongs to the far-end of active session whether the business that UE participates in is MPTY.If the far-end of active session has only one, then the business of UE participation is session one to one, and is a plurality of if the far-end of active session has, and then the business of UE participation is a MPTY.
Perhaps, the session state information on the CS territory can also comprise the identification information of the far-end of active session, the identification information of far-end that keeps session and the business information (session or MPTY one to one) of the session that UE participates in.At this moment, SCC AS can judge whether the business that UE participates in is MPTY according to the business information of session, perhaps also can judge whether the business that UE participates in is MPTY according to the number of the far-end that belongs to active session.
The identification information of said distal ends is meant the information of unique identification far-end, for example can be distal marker, or other identification informations.
Realize that system for carrying out said process comprises UE and SCC AS, wherein:
Described UE is used for session on it switches to the PS territory from the CS territory process, sends session state information on this UE CS territory to described SCC AS;
Described SCC AS is used for carrying out corresponding IMS business according to the session state information on the described CS territory of receiving.
Described SCC AS carries out corresponding IMS business according to the session state information on the described CS territory of receiving and is meant: described SCC AS is according to the described session state information on the described CS territory, judge whether the business that UE participates in is MPTY, if, carry out the business of creating meeting and adding the member, otherwise carry out more new business of medium.
Session state information on the described CS territory comprises the identification information of the far-end of active session; Described SCCAS judges according to the number that belongs to the far-end of active session whether the business that described UE participates in is MPTY; Perhaps
Session state information on the described CS territory comprise the far-end of active session identification information, keep the identification information of the far-end of session, and the business information that participates in of session; Described SCC AS perhaps according to the number that belongs to the far-end of active session, judges whether the business that described UE participates in is MPTY according to the business information of described session.
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
Figure 3 shows that one of flow process that CS of the present invention territory multi-conversation business continuity realizes, describe UE A and between CS territory and UE B, UE C, set up conversation respectively, two sessions all are anchored into SCC AS, UE A switches to the PS territory, how UE-A and network realize the successional process of multi-conversation business, and it is described below:
Step 301～302, identical with step 201～202 among Fig. 2;
Step 303, UE A support many sessions to switch, UE A initiates the IMS transfer request in the PS territory, such as sending INVITE (invitation) message, target is the sign of SCC AS, and carry the state information of many sessions switching capability and the session of CS territory, such as the remote number of active session, message travels CSCF arrives SCC AS;
Step 304, SCC AS receive 303 transfer request, select the CS territory active session of UE A according to the session state information received, promptly with the session of UE B, upgrade;
Step 305, SCC AS initiate the IMS update request through CSCF to UE B, and such as sending reINVITE (heavily inviting) message, message travels CSCF arrives UE B;
Step 306, UE B agree to upgrade, and such as sending " 200OK " message, message travels CSCF arrives SCC AS;
Step 307, SCC AS send response message to UE A, and such as sending " 200OK " message, because UE A supports many sessions to switch, so carry the information of other IMS sessions of UE-A participation in the message body, message travels CSCF arrives UE A;
So far, UE A to newly-built IMS session, is about to the session updates of its activation to be put in the newly-built IMS session with the session of UE B.
The information of other sessions that step 308, UE A basis are received, send the request of new transfer and the session of UE C to SCC AS, such as sending INVITE, band is from the information of step 307 IMS session acquisition and UEC, and requiring to keep corresponding session, message travels CSCF arrives SCC AS;
Step 309, SCC AS process CSCF initiate update request to UE C, and require the medium of renewal to be in hold mode, such as sending reINVITE message, carry the maintenance sign;
Step 310, UE C agree to upgrade, and such as sending " 200OK " message, message travels CSCF arrives SCC AS;
Step 311, SCC AS send response message to UE A, and such as sending " 200OK " message, message travels CSCF arrives UE A;
So far, UE A to newly-built IMS session, is about to the session updates of its maintenance to be put in the newly-built IMS session with the session of UE C.
Figure 4 shows that another flow process that CS of the present invention territory multi-conversation business continuity realizes, describe UE A and between CS territory and UE B, UE C, set up conversation respectively, two sessions all are anchored into SCC AS, UE A, UE B and UE C realize MPTY, UE A switches to the PS territory, how UE-A and network realize the successional process of multi-conversation business, and it is described below:
Step 401, UE A set up conversation with UE B earlier in the CS territory, conversation is set up with UE C in the back, the conversation medium are shared CS carrying between UE A and MSC, MSC sets up 2 CS carryings respectively by PSTN and MGW, MGW sets up IMS media links 1 and 2 with UE B and UE C respectively, the signaling paths of IMS part is by the grappling of SCC AS institute, UE A has started the MultiParty Service in CS territory, UE A, UE B and UE C can be conversed as meeting, this business does not have message can pass to MGW, SCC AS sees the IMS media links of 2 activation, and wherein UE C activates recently;
Step 402, UE A decision switch to the PS territory;
Step 403, UE A support many sessions to switch, UE A initiates the IMS transfer request in the PS territory, such as sending INVITE (invitation) message, target is the sign of SCC AS, and carry the state information of many sessions switching capability and the session of CS territory, such as the remote number of active session and/or activationary time, MultiParty Service sign, and other participants of MPTY, message travels CSCF arrives SCC AS;
Step 404, SCC AS receive 403 transfer request, and the convention business in IMS territory is created in decision according to the session state information received, and the convention business in IMS territory is the MultiParty Service corresponding service with the CS territory;
Step 405, SCC AS initiate the IMS call request through CSCF to meeting AS, such as sending INVITE, carry the user profile of conferenced party, this information is for pointing to the sign of SCC AS, and corresponding with the session of UE B and UE C respectively, message travels CSCF arrives meeting AS;
Step 406, meeting AS sign are created successfully, and such as sending " 200OK " message, message travels CSCF arrives SCC AS;
Step 407, SCC AS send response message to UE A, such as sending " 200OK " message, because all sessions of UE A all in MultiParty Service, have not had other sessions again, therefore do not have other session information portabilities in the message, message travels CSCF arrives UE A;
So far, UE A is updated to its MultiParty Service on the newly-built IMS media links 3.
Step 408, meeting AS add the conference member of receiving in the step 405 1 by standard procedure, and such as INVITE takes place, message travels CSCF arrives SCC AS;
Step 409, SCC AS carry out 405 o'clock meeting member 1 is corresponding with the session of UE B, so send update request to UE B, such as sending reINVITE message, message travels CSCF arrival UE B;
Step 410, UE B agree to upgrade, and such as sending " 200OK " message, message travels CSCF arrives SCC AS;
Step 411, SCC AS send to meeting AS and adhere to message, and such as sending " 200OK " message, message travels CSCF arrives meeting AS;
Step 412, with step 408 simultaneously, meeting AS adds the conference member of receiving in the step 405 2 by standard procedure, such as INVITE takes place, message travels CSCF arrives SCC AS;
Step 413, SCC AS carry out 405 o'clock meeting member 2 is corresponding with the session of UE C, so send update request to UE C, such as sending reINVITE message, message travels CSCF arrival UE C;
Step 414, UE C agree to upgrade, and such as sending " 200OK " message, message travels CSCF arrives SCC AS;
Step 415, SCC AS send to meeting AS and adhere to message, and such as sending " 200OK " message, message travels CSCF arrives meeting AS;
So far, IMS media links 1 and 2 is updated to meeting AS and links to each other, and meeting AS couples together 3 road medium, realizes conference call.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. the business continuance implementation method when the many sessions of circuit domain switch to packet domain, described method are applicable to that UE switches to the session on it scene of packet-switched domain (PS) from circuit commutative field (CS), is characterized in that described method comprises:
Described UE sends session state information on this UE CS territory to business continuance application server (SCC AS);
Described SCC AS carries out corresponding IP Multimedia System (IMS) business according to the session state information on the described CS territory of receiving.
2. the method for claim 1 is characterized in that, the step that described SCC AS carries out corresponding IMS business according to the session state information on the described CS territory of receiving further comprises:
Described SCC AS judges according to the described session state information on the described CS territory whether the business that UE participates in is MPTY, if carry out the business of creating meeting and adding the member, otherwise carry out more new business of medium.
3. method as claimed in claim 2 is characterized in that,
Session state information on the described CS territory comprises the identification information of the far-end of active session.
4. method as claimed in claim 3 is characterized in that,
Described SCC AS judges according to the number that belongs to the far-end of active session whether the business that described UE participates in is MPTY.
5. method as claimed in claim 3 is characterized in that,
Session state information on the described CS territory also comprises the identification information of the far-end that keeps session, and the business information of session.
6. method as claimed in claim 5 is characterized in that,
Described SCC AS perhaps according to the number that belongs to the far-end of active session, judges whether the business that described UE participates in is MPTY according to the business information of described session.
7. the business continuance when the many sessions of circuit domain switch to packet domain is realized system, it is characterized in that, comprises subscriber equipment (UE) and business continuance application server (SCC AS), wherein:
Described UE is used for sending session state information on this UE CS territory to described SCC AS;
Described SCC AS is used for carrying out corresponding IP Multimedia System (IMS) business according to the session state information on the described CS territory of receiving.
8. system as claimed in claim 7 is characterized in that,
Described SCC AS carries out corresponding IMS business according to the session state information on the described CS territory of receiving and is meant:
Described SCC AS judges according to the described session state information on the described CS territory whether the business that UE participates in is MPTY, if carry out the business of creating meeting and adding the member, otherwise carry out more new business of medium.
9. system as claimed in claim 8 is characterized in that,
Session state information on the described CS territory comprises the identification information of the far-end of active session;
Described SCC AS judges according to the number that belongs to the far-end of active session whether the business that described UE participates in is MPTY.
10. system as claimed in claim 8 is characterized in that,
Session state information on the described CS territory comprise the far-end of active session identification information, keep the identification information of the far-end of session, and the business information that participates in of session;
Described SCC AS perhaps according to the number that belongs to the far-end of active session, judges whether the business that described UE participates in is MPTY according to the business information of described session.
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| CN200910165671.2A CN101997847B (en) | 2009-08-14 | 2009-08-14 | Method and system for realizing service continuity in the case of switching circuit switch multi-session to packet switch |
| PCT/CN2010/071568 WO2011017926A1 (en) | 2009-08-14 | 2010-04-06 | Service continuity method and system for multi-session handover from circuit switch domain to packet switch domain |
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| CN200910165671.2A CN101997847B (en) | 2009-08-14 | 2009-08-14 | Method and system for realizing service continuity in the case of switching circuit switch multi-session to packet switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013075576A1 (en) * | 2011-11-25 | 2013-05-30 | 中兴通讯股份有限公司 | Method and system for achieving service continuation during update of medium plane |
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| CN103139148A (en) * | 2011-11-25 | 2013-06-05 | 中兴通讯股份有限公司 | Service continuity realization method and system for media interface updating process |
| CN103139148B (en) * | 2011-11-25 | 2017-10-17 | 中兴通讯股份有限公司 | The method and system of business continuance are realized in a kind of medium surface renewal process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101997847B (en) | 2014-09-03 |
| WO2011017926A1 (en) | 2011-02-17 |
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