CN103607783B - CSFB (Circuit Switched Domain Fall Back) call establishment method and user equipment - Google Patents
CSFB (Circuit Switched Domain Fall Back) call establishment method and user equipment Download PDFInfo
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Abstract
The embodiment of the invention discloses a CSFB (Circuit Switched Domain Fall Back) call establishment method and user equipment, relating to the communication field, and being capable of realizing the dispatching priority of radio resource of CS (Circuit Switched) service in CSFB and reducing the establishment time delay of a CSFB call. The method provided by the embodiment of the invention comprises the steps that the user equipment judges whether a CSFB call flow is triggered by a voice service; if the user equipment judges that the CSFB call flow is triggered by the voice service and the user equipment has a data service request, the user equipment sends a CS domain resource request message to a first base station and delays to send a PS (Packet Switch) domain resource request message to the first base station, so that the first base station gives priority to dispatch CS domain radio resource to the voice service of the user equipment; after a predetermined condition is satisfied, the user equipment sends the PS domain resource request message to the first base station so that the first base station dispatches PS domain radio resource to the data service of the user equipment.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of CSFB call-establishing methods and user equipment.
Background technology
Circuit domain dropping（Circuit Switched Domain Fall Back, abbreviation CSFB）Can realize that user sets
It is standby to initiate the circuit switching such as voice in the case where LTE is accessed（Circuit Switched, abbreviation CS）Business, receives voice etc.
The paging of CS business, and can be to terminal in Long Term Evolution（Long Term Evolution, abbreviation LTE）Under system access
Ongoing packet switch（Packet Switch, abbreviation PS）Business is properly processed.In CSFB technologies, in LTE and
Double overlay areas of 2G/3G, to voice, location service（Location Services, abbreviation LCS）And supplementary service, Yong Hushe
Standby can triggering from LTE accesses return back to Generation Mobile Telecommunication System technology（2rd-generation, abbreviation 2G）/ the third generation is moved
Communication technology（3rd-generation, abbreviation 3G）Network insertion simultaneously carries out CS business.
CSFB has become operator and selects in the common technology that LTE disposes initial stage voice solution at present.Using
CSFB falls the scheme for providing speech business to 2G/3G after rise and can make full use of conventional network resources, provides the user reliable, high
The voice service of quality.
But, during CSFB of the prior art falls after rise, for there is data service and speech business in user equipment
Fall after rise in flow process, typically speech business call setup and data business continuing are successively processed using random manner, but
If it is preferentially carry out data service and continue, to easily cause the relatively long time delay of speech business call setup, reduce Consumer's Experience.
The content of the invention
The embodiment of the present invention provides a kind of CSFB call-establishing methods and user equipment, realizes the wireless of CS business in CSFB
Resource priority distributes, and reduces CSFB call establishment time delays.
To achieve these goals, the embodiment of the present invention adopt technical scheme be,
A kind of first aspect, there is provided CSFB call-establishing methods, including：
User equipment judges whether CSFB call flows are triggered by speech business；
If the user equipment determines that the CSFB call flows are triggered by speech business, and the user equipment is present
Data service request, then the user equipment send CS domains resource request message to first base station, and postpone to first base
Stand and send ps domain resource request message, so that the first base station is preferably the speech business distribution CS domains of the user equipment
Radio Resource；
Meet it is pre-conditioned after, the user equipment to the first base station send ps domain resource request message so that
Obtain the data service distribution ps domain Radio Resource that the first base station is the user equipment.
A kind of second aspect, there is provided user equipment, including：
Judge module, for judging whether CSFB call flows are triggered by speech business；
Request module, for determining that the CSFB call flows are triggered by speech business in the judge module, and institute
When stating user equipment and there is data service request, CS domains resource request message is sent to first base station, and postponed to described first
Base station sends ps domain resource request message, so that the first base station is preferably the speech business distribution CS of the user equipment
Domain Radio Resource；
Meet it is pre-conditioned after, to the first base station send ps domain resource request message so that first base
The data service distribution ps domain Radio Resource stood as the user equipment.
Therefore, the embodiment of the present invention provides a kind of CSFB call-establishing methods and user equipment, and user equipment judges
Whether CSFB call flows are triggered by speech business；If the user equipment determines that the CSFB call flows are by speech business
Triggering, and there is data service request in the user equipment, then the user equipment sends CS domains resource request to first base station
Message, and postpone to send ps domain resource request message to the first base station, so that the first base station is preferably the use
The speech business distribution CS domains Radio Resource of family equipment；Meet it is pre-conditioned after, the user equipment is to the first base station
Send ps domain resource request message so that the first base station be preferably the user equipment data service distribution CS domains without
Line resource, so that the first base station is the data service distribution ps domain Radio Resource of the user equipment.Thus, in CSFB
In call establishment, the priority of ps domain and CS domains Business Processing is controlled by user equipment so that the Radio Resource of CS business
It is preferential to distribute, it is to avoid preferentially to distribute the extra latency for bringing as PS is carried, reduce CSFB call establishment time delays.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 provides a kind of schematic flow sheet of CSFB call-establishing methods for the embodiment of the present invention；
Fig. 2 is the schematic flow sheet of another kind of CSFB call-establishing methods provided in an embodiment of the present invention；
Fig. 3 is a kind of apparatus structure schematic diagram of user equipment provided in an embodiment of the present invention；
Fig. 4 is the apparatus structure schematic diagram of another kind of user equipment provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
On the one hand, the embodiment of the present invention provides a kind of CSFB call-establishing methods, referring to Fig. 1, including：
101st, user equipment judges whether CSFB call flows are triggered by speech business；
In the overlapping covered of LTE and 2G/3G networks, when user equipment is accessed in the lte networks, can touch
CSFB flow processs are sent out, and CSFB refers to that terminal, under LTE accesses, falls back to 2G/3G networks, terminal enabled in the feelings for accessing LTE
2G/3G networks are fallen back under condition and initiates the CS business such as voice, receive the paging of the CS business such as voice, and can be in 2G/3G
To terminal, the ongoing PS business under LTE accesses is properly processed network.
Wherein, the multiple business of user equipment can trigger CSFB flow processs, for example, speech business, the unified display in CS domains
Interface (Unified Display Interface, abbreviation UDI) video traffic, LCS, unstructured supplementary service data
（Unstructured Supplementary Service Data, abbreviation USSD）, CSFB flow processs can be triggered.
The network side of LTE after user equipment triggering CSFB flow processs can send to user equipment and redirect message, and this is heavy
Comprising redirection frequency point information in directed message；User equipment can be with weight according to the redirection frequency point information redirected in message
Network side after orientation sets up wireless heterogeneous networks（Radio Resource Control, abbreviation RRC）Connection.
The type of message of the triggering CSFB flow processs that user equipment can be sent by the network side to LTE determines whether language
The CSFB of sound business triggering, for example, if the service request information of extension that the CSFB flow processs are sent by the user equipment is touched
Send out, and indicate that then the user equipment determines the CSFB call flows comprising CSFB in the service request information of the extension
It is to be triggered by speech business.
If the 102, the user equipment determines that the CSFB call flows are triggered by speech business, and the user equipment
There is data service request, then the user equipment sends CS domains resource request message to first base station, and postpone to described the
One base station sends ps domain resource request message, so that the first base station is preferably the speech business distribution of the user equipment
CS domains Radio Resource；
Wherein, first base station can for redirect after set up the base station that RRC is connected with user equipment.
If the existing speech business of user equipment, also has data service, then after 2G/3G networks set up RRC, user equipment
Request 2G or 3G network side are respectively speech business and the data traffic assignments RAB of user equipment（Radio
Access Bearer, abbreviation RAB）Resource, but, network side can only be taken up in order of priority speech business and data for user equipment
Traffic assignments RAB resource, it is impossible to while the data service distribution RAB resources of the speech business for user equipment.
In order to reduce the call delay of speech business as far as possible, user equipment can be the speech business and data service of itself
Priority is set so that network side is preferably the speech business distribution CS domains Radio Resource of the user equipment.For example, if user
Equipment determines that the CSFB call flows are triggered by speech business, and user equipment has data service request, user equipment
CS domains resource request message can be sent to first base station, and postpone ps domain resource request message to be sent to first base station.
103rd, meet it is pre-conditioned after, the user equipment to the first base station send ps domain resource request message,
So that the first base station is the data service distribution ps domain Radio Resource of the user equipment.
Preferably, it is described pre-conditioned to be：User equipment receives the radio bearer of the first base station transmission and sets up and disappears
Breath（Radio Bearer Setup）, wherein RAB information sets up list（RAB Information Setup
List）Core network domain be designated CS domains.
When the radio bearer that user equipment receives the first base station transmission sets up message, wherein RAB letter
Breath is set up the core network domain of list and is designated CS domains, illustrates that network side is had been started up as user equipment allocation CS domain RAB resources
Flow process, so, user equipment can send ps domain resource request message to first base station, so that first base station is user equipment
Data service distribution ps domain Radio Resource.
Therefore, the embodiment of the present invention provides a kind of CSFB call-establishing methods, and user equipment judges CSFB call-flows
Whether journey is triggered by speech business；If the user equipment determines that the CSFB call flows are triggered by speech business, and institute
State user equipment and there is data service request, then the user equipment sends CS domains resource request message to first base station, and prolongs
Ps domain resource request message is sent to the first base station late, so that the first base station is preferably the language of the user equipment
Sound business distribution CS domains Radio Resource；Meet it is pre-conditioned after, the user equipment to the first base station send ps domain money
Source request message, so that the first base station is preferably the data service distribution CS domains Radio Resource of the user equipment, with
So that the first base station is the data service distribution ps domain Radio Resource of the user equipment.Thus, in CSFB call setups
During, the priority of ps domain and CS domains Business Processing is controlled by user equipment so that the Radio Resource of CS business preferentially distributes,
Avoid preferentially distributing the extra latency for bringing as PS is carried, reduce CSFB call establishment time delays.
Embodiment of the method shown in Fig. 1 is described in detail below by specific embodiment.First the present embodiment is set
Scene illustrate, but, the scene is appointed for the present invention is not constituted merely to clearer explanation present disclosure
What limits.In the application scenarios set in the present embodiment, it is assumed that user equipment falls back to 3G network by LTE network by CSFB,
First base station is the base station in 3G network, and the second base station is the base station in LTE network.
Referring to Fig. 2, may comprise steps of：
201：User equipment sends the service request information of extension to the second base station, is flowed with triggers circuit domain dropping CSFB
Journey；
Wherein, user equipment can send the service request information of extension by following processes to the second base station：
User equipment is to mobile management entity（Mobile Managenment Entity, abbreviation MME）Send the clothes of extension
Business request message（Extended Service Request）The message package contains " CSFB instructions "（CS Fallback
Indicator）." CSFB instructions " needs to perform CSFB processes for indicating MME.
Preferably, user equipment only can send the service request information of extension in the following cases：Use united
EPS/IMSI attaching process, has carried out the attachment of CS domains, and can not initiate IMS voice conversations.
MME sends UE context modification request message（UE Context Modification Request）To the second base
Stand, wherein comprising " CSFB instructions "（CS Fallback Indicator）." CSFB instructions " for the second base station indicate should
User equipment is moved to into GSM EDGE radio access networks（GSM EDGE Radio Access Network, referred to as
GERAN）Or UMTS Terrestrial radio access network（UMTS Terrestrial Radio Access Network, abbreviation UTRAN）Net
In network.
Second base station UE contextual modifications respond UE Context Modification Response message and return to MME
Should.
Alternatively, the second base station can be little to determine which target GERAN/UTRAN to MME request UE measurement reports
Area performs redirection process, in the present embodiment, it is assumed that UE measurement reports indicate that the second base station performs weight to one of 3G cells
Orientation process, the base station of the 3G cells is first base station.
202：User equipment receives second base station and sends RRC connection release message, wherein, the RRC Connection Releases
Comprising redirection frequency point information in message；
Wherein, after the second base station determines redirection target cell, RRC connection release message can be sent to user equipment,
Comprising frequency point information is redirected in the RRC connection release message, for example, can be the frequency of Target cell.
203：User equipment is set up RRC with the second base station according to the redirection frequency point information and is connected；
204：Judge whether CSFB flow processs are triggered by the service request information for extending, and the service request information of the extension
In comprising CSFB indicate；If so, then execution step 205, if it is not, then execution step 208；
Whether if CSFB flow processs are judged by the service request information triggering for extending, and in the service request information of the extension
Indicate comprising CSFB, then the user equipment determines that the CSFB call flows are triggered by speech business.Otherwise, it is determined that
CSFB call flows are not have speech business to trigger.
205：If the user equipment has data service request, the user equipment sends CS domains money to first base station
Source request message, and postpone to send ps domain resource request message to the first base station, so that the first base station is preferably
The speech business distribution CS domains Radio Resource of the user equipment；
If the existing speech business of user equipment, also has data service, in order to reduce the call delay of speech business as far as possible, use
Family equipment is the speech business of itself and data business setting priority so that network side is preferably the voice of the user equipment
Traffic assignments CS domain Radio Resource.
Specifically, can be accomplished by：If user equipment determines that the CSFB call flows are by speech business
Triggering, and there is data service request in user equipment, user equipment can send CS domains resource request message to first base station, and
Postpone to send ps domain resource request message to first base station.
For example, the form of CS domains resource request message can be CM service requests（CM Service Request）Message.
206：If the radio bearer that user equipment receives the first base station transmission sets up message, wherein wireless access holds
Information carrying breath is set up the core network domain of list and is designated CS domains, then user equipment sends ps domain resource request to the first base station and disappears
Breath；
If user equipment receives the radio bearer of the first base station transmission and sets up message, wherein RAB letter
Breath sets up list（rab-Information Setup List）Core network domain mark（cn-DomainIdentity）For CS domains
（cs-domain）, illustrate that network side has been started up the flow process for user equipment allocation CS domain RAB resources, so, user equipment can
With to first base station send ps domain resource request message so that first base station for user equipment data service distribution ps domain without
Line resource.For example, the form of ps domain resource request message can be service request（Service Request）Message.
207：The user equipment receives the first base station radio bearer and sets up message, wherein RAB letter
Breath is set up the core network domain of list and is designated ps domain；
208：Accessed by normal procedure.
If CSFB flow processs are triggered by speech business, user equipment can be accessed by normal procedure, without prolonging
It is tardy to send ps domain resource request message.
Therefore, the embodiment of the present invention provides a kind of CSFB call-establishing methods, and user equipment judges CSFB call-flows
Whether journey is triggered by speech business；If the user equipment determines that the CSFB call flows are triggered by speech business, and institute
State user equipment and there is data service request, then the user equipment sends CS domains resource request message to first base station, and prolongs
Ps domain resource request message is sent to the first base station late, so that the first base station is preferably the language of the user equipment
Sound business distribution CS domains Radio Resource；Meet it is pre-conditioned after, the user equipment to the first base station send ps domain money
Source request message, so that the first base station is preferably the data service distribution CS domains Radio Resource of the user equipment, with
So that the first base station is the data service distribution ps domain Radio Resource of the user equipment.Thus, in CSFB call setups
During, the priority of ps domain and CS domains Business Processing is controlled by user equipment so that the Radio Resource of CS business preferentially distributes,
Avoid preferentially distributing the extra latency for bringing as PS is carried, reduce CSFB call establishment time delays.
On the one hand, the embodiment of the present invention provides a kind of apparatus structure schematic diagram of user equipment 30, as shown in figure 3, the use
Family equipment 30 can include：
Judge module 301, for judging whether CSFB call flows are triggered by speech business；
Request module 302, for determining that the CSFB call flows are triggered by speech business in the judge module, and
When the user equipment has data service request, CS domains resource request message is sent to first base station, and postpone to described the
One base station sends ps domain resource request message, so that the first base station is preferably the speech business distribution of the user equipment
CS domains Radio Resource；Meet it is pre-conditioned after, send ps domain resource request message to the first base station, so that described the
One base station is preferably the data service distribution CS domains Radio Resource of the user equipment, so that the first base station is the use
The data service distribution ps domain Radio Resource of family equipment.
Further, referring to Fig. 4, the user equipment 30 also includes：
Sending module 303, for the service request information of extension is sent to the second base station, with triggers circuit domain dropping CSFB
Flow process；
Receiver module 304, sends redirection message for receiving second base station, wherein, in the redirection message
Comprising redirection frequency point information；
RRC connection establishment modules 305, for according to the redirection frequency point information redirected in message and the second base station
Set up RRC connections.
Further, the judge module 301 specifically for：
If the service request information triggering of the extension that the CSFB flow processs are sent by the user equipment, and the extension
Indicate comprising CSFB in service request information, it is determined that the CSFB call flows are triggered by speech business.
Preferably, it is described pre-conditioned to be：The receiver module receives the radio bearer of the first base station transmission and builds
Vertical message, wherein RAB information are set up the core network domain of list and are designated CS domains.
Therefore, the embodiment of the present invention provides a kind of user equipment 30, and whether user equipment judges CSFB call flows
Triggered by speech business；If the user equipment determines that the CSFB call flows are triggered by speech business, and the user
There is data service request in equipment, then the user equipment sends CS domains resource request message to first base station, and postpones to institute
State first base station and send ps domain resource request message, so that the first base station is preferably the speech business of the user equipment
Distribution CS domains Radio Resource；Meet it is pre-conditioned after, the user equipment to the first base station send ps domain resource request
Message, so that the first base station is preferably the data service distribution CS domains Radio Resource of the user equipment, so that institute
State the data service distribution ps domain Radio Resource that first base station is the user equipment.Thus, in CSFB call establishments,
The priority of ps domain and CS domains Business Processing is controlled by user equipment so that the Radio Resource of CS business preferentially distributes, it is to avoid by
Carry in PS and preferentially distribute the extra latency for bringing, reduce CSFB call establishment time delays.
Finally it should be noted that：Above example only to illustrate technical scheme, rather than a limitation；Although
With reference to the foregoing embodiments the present invention has been described in detail, it will be understood by those within the art that：Which still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (6)
1. a kind of circuit domain dropping CSFB call-establishing methods, it is characterised in that include：
User equipment judges whether CSFB call flows are triggered by speech business；
If the user equipment determines that the CSFB call flows are triggered by speech business, and there are data in the user equipment
Service request, then the user equipment send CS domains resource request message to first base station, and postpone to the first base station to send out
Ps domain resource request message is sent, so that the speech business distribution CS domains that the first base station is preferably the user equipment are wireless
Resource；
Meet it is pre-conditioned after, the user equipment to the first base station send ps domain resource request message so that institute
State the data service distribution ps domain Radio Resource that first base station is the user equipment；
Wherein, it is described pre-conditioned to be：The user equipment receives the radio bearer of the first base station transmission and sets up message,
Wherein RAB information is set up the core network domain of list and is designated CS domains.
2. method according to claim 1, it is characterised in that the user equipment judge CSFB call flows whether by
Speech business is triggered, and before, methods described also includes：
User equipment sends the service request information of extension to the second base station, with triggers circuit domain dropping CSFB flow processs；
The user equipment receives the redirection message that second base station sends, wherein, comprising weight in the redirection message
Orientation frequency point information；
The user equipment is set up RRC with first base station according to the redirection frequency point information redirected in message and is connected.
3. method according to claim 2, it is characterised in that whether the user equipment judges the CSFB call flows
Triggered by speech business, including：
If the service request information triggering of the extension that the CSFB flow processs are sent by the user equipment, and the service of the extension
Indicate comprising CSFB in request message, then the user equipment determines that the CSFB call flows are triggered by speech business.
4. a kind of user equipment, it is characterised in that include：
Judge module, for judging whether CSFB call flows are triggered by speech business；
Request module, for determining that the CSFB call flows are triggered by speech business in the judge module, and the use
When family equipment has data service request, CS domains resource request message is sent to first base station, and postponed to the first base station
Send ps domain resource request message so that the first base station be preferably the user equipment speech business distribution CS domains without
Line resource；
Meet it is pre-conditioned after, to the first base station send ps domain resource request message so that the first base station is
The data service distribution ps domain Radio Resource of the user equipment；Wherein, it is described pre-conditioned to be：The user equipment is received
The radio bearer that the first base station sends sets up message, and wherein RAB information sets up the core network domain mark of list
For CS domains.
5. user equipment according to claim 4, it is characterised in that the user equipment also includes：
Sending module, for the service request information of extension is sent to the second base station, with triggers circuit domain dropping CSFB flow processs；
Receiver module, for receiving the redirection message that second base station sends, wherein, comprising weight in the redirection message
Orientation frequency point information；
RRC connection establishment modules, for setting up RRC with first base station according to the redirection frequency point information redirected in message
Connection.
6. user equipment according to claim 5, it is characterised in that the judge module specifically for：
If the service request information triggering of the extension that the CSFB flow processs are sent by the user equipment, and the service of the extension
Indicate comprising CSFB in request message, it is determined that the CSFB call flows are triggered by speech business.
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| WO2016054822A1 (en) * | 2014-10-11 | 2016-04-14 | 华为技术有限公司 | Csfb call establishment method and device |
| CN107005895A (en) * | 2014-12-30 | 2017-08-01 | 华为技术有限公司 | A kind of method of circuit domain dropping, equipment and system |
| CN106162623B (en) * | 2015-04-13 | 2020-02-14 | 中国移动通信集团公司 | CSFB terminal voice call encryption method, device and terminal |
| US10117135B2 (en) | 2015-09-23 | 2018-10-30 | Mediatek Inc. | Apparatuses and methods for reducing setup time of a circuit-switched fallback (CSFB) call |
| CN105517088B (en) * | 2015-12-28 | 2019-03-08 | 深圳市万普拉斯科技有限公司 | The switching method and system of voice fallback |
| WO2018201440A1 (en) * | 2017-05-05 | 2018-11-08 | 华为技术有限公司 | Communication method, device and system |
| CN107529171B (en) * | 2017-09-27 | 2021-04-23 | 成都欧珀通信科技有限公司 | Method for detecting terminal access pseudo base station and related product |
| CN110099422B (en) * | 2019-05-21 | 2021-04-02 | 中国联合网络通信集团有限公司 | CSFB call establishment method, mobile switching center and call system |
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| CN101494848A (en) * | 2008-01-25 | 2009-07-29 | 华为技术有限公司 | Method, system and equipment for hanging-up and recovering business |
| CN102027798A (en) * | 2008-05-13 | 2011-04-20 | 三星电子株式会社 | Method and apparatus for providing voice call in mobile communication system and system thereof |
| CN102907130A (en) * | 2011-08-12 | 2013-01-30 | 展讯通信（上海）有限公司 | Mobile terminal and service processing method thereof, and baseband processing chip |
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