CN101553039B - Method and base station for call establishment - Google Patents
Method and base station for call establishment Download PDFInfo
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- CN101553039B CN101553039B CN2008100666040A CN200810066604A CN101553039B CN 101553039 B CN101553039 B CN 101553039B CN 2008100666040 A CN2008100666040 A CN 2008100666040A CN 200810066604 A CN200810066604 A CN 200810066604A CN 101553039 B CN101553039 B CN 101553039B
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- 230000008569 process Effects 0.000 claims description 32
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- 230000008859 change Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 7
- 238000010295 mobile communication 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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Abstract
The invention discloses a method and a base station for call establishment. By acquiring the double transmission mode capacity information of a destination network in which session service is carried by a circuit domain, when a pure packet switching domain source network receives a service request for the circuit domain, if the destination network supports the packet switching domain handoff and the double transmission mode, the packet switching domain handoff is executed, a circuit domain call establishment procedure is carried out in the destination network, and thus, the CS service access delay is reduced.
Description
Technical field
The present invention relates to communication technical field, especially relate to a kind of method and base station of call setup.
Background technology
Second generation mobile communication technology (2nd Generation, 2G) or 3G (Third Generation) Moblie technology (3rdGeneration, 3G) network, for example, global system for mobile communications (Global System for MobileCommunication, GSM) or Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division MultipleAccess, WCDMA) network can form a kind of comprehensive covering through for many years deployment.Along with development of internet technology, some only provide packet-switched domain (Packet Switched, PS) pure PS territory network-covered is to some cities and traffic hot zones, for example, System Architecture Evolution (System ArchitectureEvolution, SAE)/Long Term Evolution (Long Term Evolution, LTE), high-speed packet inserts (HighSpeed Packet Access, HSPA), high-speed packet insert evolution (High Speed Packet AccessEvolution, HSPA+) or micro-wave access to global intercommunication (Worldwide Interoperability forMicrowave Access, WiMAX) network.Thereby in present communication network, these pure PS territory networks and 2G or 3G network are also deposited.
Different networks has different carrying mechanisms, at different network carrying mechanism, the audio call of mobile communication can be divided into two classes: the first kind is circuit commutative field (Circuit Switched, CS) Cheng Zai session service, for example voice call; Second class is the session service of PS territory carrying, be also referred to as internet protocal carried voice technology (Voice over Internet Protocol, VoIP) class business, by IP multimedia service subsystem (IP Multimedia Subsystem, IMS) provide quality of service (Quality ofService, OoS) guarantee, for example the voice call of IP carrying.
For pure PS territory network, audio call generally can only transmit in its PS territory carrying, and IMS controls audio call by IP-based network.And in 2G or 3G network, audio call generally is carried on the CS territory.
The user who makes a call is in the call process, can cross over the network of two different bearer mechanism, because the difference of load-bearing of mobile telecommunication business mechanism, for example, (User Equipment UE) moves out the scope that the base station covered of pure PS territory network, and when entering the area of coverage of base station of 2G or 3G network when portable terminal, the interruption of audio call may occur, thereby influence the continuity that user speech is called out.
In order to address the above problem, guarantee the continuity that user speech is called out, for the CS business, can adopt at present and return back to CS territory (CS fallback) mechanism and handle, for example, when mobile phone is initiated CS calling or response CS paging at the LTE network, switching or gravity treatment are to GSM EDGE Radio Access Network (GSM/EDGE Radio Access Network earlier, GERAN) or Universal Terrestrial Radio Access Network (UniversalTerrestrial Radio Access Network, UTRAN) network is set up the CS calling again, when described GERAN or UTRAN network support PS switch, carry out PS and switch, carry out circuit domain call at described GERAN or UTRAN network and set up flow process.
The inventor finds in realizing process of the present invention, in such scheme,, objective network do not support two transmission (Dual Transfer Mode if supporting PS to switch, DTM) pattern, then the PS business can't be carried out simultaneously with the CS business, after promptly carrying out the PS switching, before the professional release of PS, can't set up the CS business, cause the professional time delay of setting up of CS.
Summary of the invention
The embodiment of the invention provides a kind of method and base station of call setup, to guarantee to return back to effective execution of CS territory (CSfallback) mechanism.
On the one hand, the embodiment of the invention discloses a kind of method of call setup, comprising:
Pure packet-switched domain source network obtains the double-transmission mode ability information by the objective network of circuit domain carrying session service;
After described source network is received the circuit domain business request,, then carry out packet-switched domain and switch, carry out circuit domain call at described objective network and set up flow process if described objective network supports packet-switched domain to switch and double-transmission mode;
If described objective network is not supported packet-switched domain switching or support packet-switched domain to switch but is not supported double-transmission mode, then the cell change flow process by network assistance portable terminal is linked into described objective network sub-district or by the autonomous gravity treatment of described portable terminal to described objective network sub-district, carry out circuit domain call at described objective network and set up flow process.
On the other hand, the embodiment of the invention also discloses a kind of pure packet-switched domain network base station, comprising:
Information acquisition unit is used to obtain the double-transmission mode ability information by the objective network of circuit domain carrying session service;
Receiving element is used for receiving circuit territory service request;
Performance element is used for after described receiving element receives the circuit domain business request, when described objective network is supported packet-switched domain switching and double-transmission mode, carries out packet-switched domain and switches; And/or, when described objective network is not supported packet-switched domain switching or support packet-switched domain to switch but is not supported double-transmission mode, cell change flow process by network assistance is linked into described objective network sub-district with portable terminal, or the autonomous gravity treatment of triggering mobile terminals is to described objective network sub-district.
Technical scheme by the embodiment of the invention as can be seen, by considering the DTM ability of target access network, can in CS fallback mechanism implementation procedure, reduce CS service access time delay, keep the continuity of PS territory business, guaranteed effective execution of CS fallback mechanism.
Description of drawings
Fig. 1 is the schematic flow sheet one of the inventive method embodiment;
Fig. 2 is the schematic flow sheet two of the inventive method embodiment;
Fig. 3 is the schematic flow sheet three of the inventive method embodiment;
Fig. 4 is the schematic flow sheet four of the inventive method embodiment;
Fig. 5 is the schematic flow sheet five of the inventive method embodiment;
Fig. 6 is the structural representation of base station embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is made specific description.
When mobile phone at pure PS territory network, LTE network of not disposing IMS for example initiates that CS calls out or during response CS paging, adopt CS fallback mechanism, i.e. switching or gravity treatment earlier arrived with the network by CS territory carrying session service that covers, for example, and GERAN or UTRAN network.To be example to the GERAN network, specifically set forth the technical scheme of call-establishing method embodiment of the present invention in conjunction with the accompanying drawings below by the LTE network reselection, as shown in Figure 1:
One, obtains objective network, i.e. the DTM ability information of GERAN network
The source access network, for example, evolution base station (Evolved NodeB eNodeB) obtains the DTM ability information of objective network, can be by one of following four kinds of modes:
A) (RAN Information Management RIM) obtains the DTM ability information of objective network by the wireless access network information management process.
In the RIM process, target access network, promptly the GERAN Access Network will comprise that by core net the system information of DTM ability information is transparent to the source Access Network, for example, the system information of the described DTM of comprising ability information can be carried in the system message of Access Network transmission.The RIM flow process can be used as necessary flow process and uses all the time.
B) can be when needed to target access network request DTM ability information, feed back its DTM ability information to described eNodeB after the target access network request of receiving.
C) target access network initiatively provides its DTM ability information to eNodeB.
D) the DTM ability information with target access network is configured on the eNodeB.
Above-mentioned four kinds of methods of obtaining the DTM ability information of objective network only are exemplary; the present invention does not limit the concrete mode of the DTM ability information of obtaining objective network; so long as can realize obtaining the mode of the purpose of DTM ability information, all within protection scope of the present invention.
If two described objective networks support packet-switched domain to switch and double-transmission mode, then carry out packet-switched domain and switch, carry out circuit domain call at described objective network and set up flow process.
For example, when evolution base station is received circuit domain call request from portable terminal, when promptly terminal is initiated the CS caller, idiographic flow as shown in Figure 2:
21) evolution base station is received the CS call request from portable terminal.
22) evolution base station can measurement report of acquisition request, and with the GERAN Target cell of determining that packet-switched domain switches, this step is optional.
23) if objective network supports PS to switch and DTM, then evolution base station is carried out the PS switching, for example, can pass through to send reorientation and require message (Relocation required) to initiate a PS switching of arriving described GERAN Target cell.The flow process that concrete PS switches can be not described in detail with reference to the 3GPP related specifications herein.
24) set up CS caller audio call at the GERAN Target cell.
When LTE network response during, be that example is described detailed process with flow process shown in Figure 3 from the CS service paging request of GERAN network:
31) the moving exchanging center MSC transtation mission circuit territory paging request of GERAN network correspondence is to the Mobility Management Entity MME of LTE network, and described MME is transmitted to this CS paging request the evolution base station of LTE network.
32) described evolution base station is according to the CS paging request from core net, can measurement report of acquisition request, determine the GERAN Target cell that PS switches with this, and this step is optional.
33) if objective network supports PS to switch and DTM, then evolution base station is carried out the PS switching, for example, can pass through to send reorientation and require message (Relocation required) to initiate a PS switching of arriving described GERAN Target cell.The flow process that concrete PS switches can be not described in detail with reference to the 3GPP related specifications herein.
34) portable terminal is set up the called audio call of CS in target GERAN sub-district.
Three, objective network is supported PS to switch but is not supported DTM, perhaps, when objective network does not support that PS switches, cell change flow process by network assistance portable terminal is linked into described objective network sub-district or by the autonomous gravity treatment of described portable terminal to described objective network sub-district, carry out circuit domain call at described objective network and set up flow process.
For example, when evolution base station is received circuit domain call request from portable terminal, when promptly terminal was initiated the CS caller, the cell change flow process by network assistance was linked into the objective network sub-district with portable terminal, idiographic flow as shown in Figure 4:
41) evolution base station is received the circuit domain call request from portable terminal.
42) evolution base station can measurement report of acquisition request, determines the GERAN Target cell of the sub-district gravity treatment of network assistance with this, and this step is optional.
43) objective network is supported PS to switch but is not supported DTM, and perhaps, when objective network did not support that PS switches, evolution base station sent the cell change order to portable terminal, and the gravity treatment of auxiliary moving terminal is to target GERAN sub-district.In the cell changing procedure of described network assistance, can send and quicken the required information of portable terminal access target GERAN sub-district circuit domain to reduce the time delay that circuit domain call is set up.If when portable terminal exists the PS territory professional, at first initiate circuit domain business at described objective network.
44) set up CS caller audio call in target GERAN sub-district.
When LTE network response during, be that example is described detailed process with flow process shown in Figure 5 from the CS service paging request of GERAN network:
51) the moving exchanging center MSC transtation mission circuit territory paging request of GERAN network correspondence is to the Mobility Management Entity MME of LTE network, and described MME is transmitted to this CS paging request the evolution base station of LTE network.
52) described evolution base station is according to the CS paging request from core net, can measurement report of acquisition request, determine the GERAN Target cell of the sub-district gravity treatment of network assistance with this, and this step is optional.
53) objective network is supported PS to switch but is not supported DTM, and perhaps, when objective network did not support that PS switches, evolution base station sent the cell change order to portable terminal, and the gravity treatment of auxiliary moving terminal is to target GERAN sub-district.In the cell changing procedure of described network assistance, can send and quicken the required information of portable terminal access target GERAN sub-district circuit domain to reduce the time delay that circuit domain call is set up.If when portable terminal exists the PS territory professional, at first initiate circuit domain business at described objective network.
54) portable terminal is set up the called audio call of CS in target GERAN sub-district.
Objective network is supported PS to switch but is not supported DTM, perhaps, when objective network does not support that PS switches, also can carry out circuit domain call at described objective network and set up flow process by the autonomous gravity treatment of described portable terminal to described objective network sub-district.
Description by above embodiment, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential hardware platform, can certainly all implement, but the former is better execution mode under a lot of situation by hardware.Based on such understanding, all or part of can the embodying that the technical scheme of the embodiment of the invention contributes to background technology with the form of software product, this computer software product can be stored in the storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
The embodiment of the invention also provides a kind of pure packet-switched domain network base station, as shown in Figure 6, comprising:
Receiving element 62 is used for receiving circuit territory service request;
Optionally, described base station also comprises: measurement report element 64 is used to obtain measurement report, with the Target cell of the sub-district gravity treatment of determining network assistance.
Described performance element can comprise with one of lower module or its combination in any:
The 3rd Executive Module 633 is used for when described objective network is not supported packet-switched domain switching or support packet-switched domain to switch but do not supported double-transmission mode, and the autonomous gravity treatment of triggering mobile terminals is to described objective network sub-district.
The base station that the embodiment of the invention provides, basic identical with the mutual implementation procedure of other entity in the network with the description of the inventive method embodiment, no longer be repeated in this description herein.
The pure PS territory network of mentioning in the embodiment of the invention includes but not limited to SAE/LTE, HSPA, HSPA+ or WiMAX network, and the network of mentioning in the embodiment of the invention by CS territory carrying session service includes but not limited to 2G or 3G network.
By various embodiments of the present invention as can be seen, by obtaining the DTM ability of target access network, which kind of can correctly adjudicate adopting CS fallback mechanism, for example, if objective network is supported PS to switch but is not supported DTM, then portable terminal is linked into described objective network sub-district by the NACC flow process or by the autonomous gravity treatment of described portable terminal to described objective network sub-district, thereby after avoiding carrying out the PS switching, do not want earlier professional release of PS to be set up the CS business again because do not support DTM, thereby reduced CS service access time delay; If objective network supports PS to switch and DTM, then carry out PS and switch, carry out CS call setup flow process, thereby also taken into account the continuity of PS territory business; Guaranteed effective execution of CS fallback mechanism.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1. the method for a call setup is characterized in that, comprises
Pure packet-switched domain source network obtains the double-transmission mode ability information by the objective network of circuit domain carrying session service;
After described source network is received the circuit domain business request,, then carry out packet-switched domain and switch, carry out circuit domain call at described objective network and set up flow process if described objective network supports packet-switched domain to switch and double-transmission mode;
If described objective network is not supported packet-switched domain switching or support packet-switched domain to switch but is not supported double-transmission mode, then the cell change flow process by network assistance portable terminal is linked into described objective network sub-district or by the autonomous gravity treatment of described portable terminal to described objective network sub-district, carry out circuit domain call at described objective network and set up flow process.
2. the method for claim 1 is characterized in that, the described double-transmission mode ability information of obtaining objective network comprises:
Obtain the double-transmission mode ability information of described objective network by the wireless access network information management process; Perhaps
To described objective network request double-transmission mode ability information, described objective network is received request back its double-transmission mode ability information of feedback; Perhaps
Described objective network initiatively provides its double-transmission mode ability information; Perhaps
The double-transmission mode ability information of described objective network is configured on the described source network.
3. the method for claim 1 is characterized in that, the circuit domain business request that described source network is received comprises:
From the circuit domain call request of described portable terminal or from the CS paging request of described objective network.
4. the method for claim 1 is characterized in that, in the cell change flow process of described network assistance, sends and quickens to insert objective network sub-district circuit domain information needed to described portable terminal.
5. the method for claim 1, it is characterized in that, if there is grouping commutative field service in described portable terminal, after the cell change flow process by described network assistance is linked into described objective network sub-district with described portable terminal, at first initiate circuit domain business in described objective network sub-district.
6. a pure packet-switched domain network base station is characterized in that, comprising:
Information acquisition unit is used to obtain the double-transmission mode ability information by the objective network of circuit domain carrying session service;
Receiving element is used for receiving circuit territory service request;
Performance element is used for after described receiving element receives the circuit domain business request, when described objective network is supported packet-switched domain switching and double-transmission mode, carries out packet-switched domain and switches; And/or, when described objective network is not supported packet-switched domain switching or support packet-switched domain to switch but is not supported double-transmission mode, cell change flow process by network assistance is linked into described objective network sub-district with portable terminal, or the autonomous gravity treatment of triggering mobile terminals is to described objective network sub-district.
7. base station as claimed in claim 6 is characterized in that, described base station also comprises:
Measurement report element is used to obtain measurement report.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100666040A CN101553039B (en) | 2008-04-03 | 2008-04-03 | Method and base station for call establishment |
| PCT/CN2009/071031 WO2009121282A1 (en) | 2008-04-03 | 2009-03-26 | A method and a base station for call set-up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100666040A CN101553039B (en) | 2008-04-03 | 2008-04-03 | Method and base station for call establishment |
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| Publication Number | Publication Date |
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| CN101553039A CN101553039A (en) | 2009-10-07 |
| CN101553039B true CN101553039B (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100666040A Expired - Fee Related CN101553039B (en) | 2008-04-03 | 2008-04-03 | Method and base station for call establishment |
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| CN (1) | CN101553039B (en) |
| WO (1) | WO2009121282A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2472826B (en) * | 2009-08-20 | 2012-06-27 | Samsung Electronics Co Ltd | Selection of method for performing a packet switched to circuit switched session transfer and a network element therefor |
| JP4841675B2 (en) | 2010-02-09 | 2011-12-21 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile communication system, network device, and mobile communication method |
| US8565187B2 (en) * | 2010-03-10 | 2013-10-22 | Via Telecom, Inc. | Fast reselection to other radio access technology after circuit switched fallback |
| CN102209370B (en) * | 2010-03-31 | 2015-09-02 | 重庆重邮信科通信技术有限公司 | LTE multimode terminal has issued the method for circuit domain voice call at LTE access module |
| TWI513254B (en) * | 2011-03-16 | 2015-12-11 | Chiun Mai Comm Systems Inc | Communication method applied in a mobile phone |
| CN102833807B (en) * | 2011-06-14 | 2015-05-27 | 华为技术有限公司 | Method and device for suspending packet data service |
| US20140177591A1 (en) * | 2012-12-21 | 2014-06-26 | Qualcomm Incorporated | Systems and methods for reduced latency circuit switched fallback |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1421084A (en) * | 2000-03-31 | 2003-05-28 | 摩托罗拉公司 | Method for enabling mobile station to receive circuit-switched page |
| WO2007007150A1 (en) * | 2005-07-07 | 2007-01-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and base station controller for handover of simultaneous voice and data sessions |
| CN101035364A (en) * | 2007-03-30 | 2007-09-12 | 上海华为技术有限公司 | Switching method from 3G cell to 2G cell and network side device |
| KR20070098389A (en) * | 2006-03-31 | 2007-10-05 | 엘지전자 주식회사 | Method of performing and supporting handover in mobile communication system |
-
2008
- 2008-04-03 CN CN2008100666040A patent/CN101553039B/en not_active Expired - Fee Related
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2009
- 2009-03-26 WO PCT/CN2009/071031 patent/WO2009121282A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1421084A (en) * | 2000-03-31 | 2003-05-28 | 摩托罗拉公司 | Method for enabling mobile station to receive circuit-switched page |
| WO2007007150A1 (en) * | 2005-07-07 | 2007-01-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and base station controller for handover of simultaneous voice and data sessions |
| KR20070098389A (en) * | 2006-03-31 | 2007-10-05 | 엘지전자 주식회사 | Method of performing and supporting handover in mobile communication system |
| CN101035364A (en) * | 2007-03-30 | 2007-09-12 | 上海华为技术有限公司 | Switching method from 3G cell to 2G cell and network side device |
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| Publication number | Publication date |
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| CN101553039A (en) | 2009-10-07 |
| WO2009121282A1 (en) | 2009-10-08 |
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Effective date of registration: 20180427 Address after: California, USA Patentee after: Global innovation polymerization LLC Address before: London, England Patentee before: GW partnership Co.,Ltd. Effective date of registration: 20180427 Address after: London, England Patentee after: GW partnership Co.,Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |
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