CN110324816A - A kind of CSFB caller method, system and mobile terminal - Google Patents
A kind of CSFB caller method, system and mobile terminal Download PDFInfo
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- CN110324816A CN110324816A CN201910625354.8A CN201910625354A CN110324816A CN 110324816 A CN110324816 A CN 110324816A CN 201910625354 A CN201910625354 A CN 201910625354A CN 110324816 A CN110324816 A CN 110324816A
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- mobile terminal
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- called number
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
- H04W8/24—Transfer of terminal data
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The present invention discloses a kind of CSFB caller method, calling service is initiated including mobile terminal, and below step is carried out according to the status information of the called number of acquisition: when the status information of called number is to shut down or not in the area of coverage, the corresponding prompt tone of mobile terminal playing, and mobile terminal does not fall the domain CS after rise；When the status information of called number is normal condition, mobile terminal playing calls ongoing prompt tone, and mobile terminal falls the domain CS after rise and called.Correspondingly, a kind of CSFB calling system and a kind of mobile terminal are also disclosed.This method, system and mobile terminal, so that calling subscriber hears prompt tone for shutdown or not in the area of coverage, calling subscriber's on-hook, mobile terminal does not fall the domain CS after rise；When calling subscriber hears the ongoing prompt tone of calling, calling subscriber not will be considered that network signal is bad and hangs up the telephone and calls again, so as to promote user experience.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of CSFB caller methods, system and mobile terminal.
Background technique
Currently, in the lte networks, when carrying out voice call service, generalling use circuit domain dropping (Circuit
Switch Fall Back, CSFB) technology LTE network voice call service is fallen after rise to 2G (2nd Generation) network or
3G (3rd Generation) network provides voice service by 2/3G network；After voice communication, mobile terminal again from
2/3G network returns to LTE network.
In CSFB calling procedure, when the mobile terminal in LTE network has caller demand, mobile terminal is sent to MME
It activates business request, MME sends mobile terminal to eNB and falls cell instruction after rise, and the falling cell information of configuration is sent to shifting by eNB
Dynamic terminal, mobile terminal carries out falling cell measurement, and measurement result is sent to eNB, after eNB determines suitable falling cell
The information is sent to mobile terminal, mobile terminal falls back to suitable cell.On the one hand, mobile terminal is fallen after rise from LTE network
There is certain duration to 2/3G network, it is mobile whole especially when the cell for falling cell after rise with registering when combining and adhering to is inconsistent
It holds and first has to carry out location updating, after the completion of location updating, carry out authentication, calling could be initiated after authentication, it is whole
A calling procedure is long, and sends request of activating business in mobile terminal and receive caller MSC return to mobile terminal
Between ring-back tone message, user is not received by any prompt tone message, is in silent status, and user is possible to think that network is believed
Number bad and hang up the telephone and re-start calling, user's perception is bad.
On the other hand, calling subscriber is fallen after rise from LTE network to 2/3G network, learns that called subscriber condition is in calling procedure
It shuts down or not in the area of coverage, calling subscriber understands on-hook, then is back to LTE network from 2/3G network, it is possible to cause caller
User is the problem of falling after rise with paging is not received in return course.
Summary of the invention
The technical problem to be solved by the present invention is to be directed to the above-mentioned deficiency of the prior art, a kind of CSFB calling party is provided
Method, system and mobile terminal activate business request to connecing from transmission to solve the mobile terminal in LTE network in the prior art
It receives between the ring-back tone message that caller MSC is returned, user is not received by any prompt tone message, is in silent status, user
It is possible that thinking that network signal is bad and hangs up the telephone and re-starts calling, user is caused to perceive bad problem, and solves to work as
Called subscriber shuts down or not in the case where the area of coverage can not establish calling connection, and calling subscriber is caused to fall after rise and returning
Not the problem of paging is not received in journey.
In order to solve the above technical problems, the present invention provides a kind of CSFB caller method, comprising:
Mobile terminal initiates calling service, and carries out below step according to the status information of the called number of acquisition:
When the status information of called number be shutdown or not in the area of coverage, the corresponding prompt tone of mobile terminal playing, and
Mobile terminal does not fall the domain CS after rise；
When the status information of called number is normal condition, mobile terminal playing calls ongoing prompt tone, and
Mobile terminal falls the domain CS after rise and is called.
Preferably, the step of status information of acquisition for mobile terminal called number specifically includes:
Mobile terminal sends request of activating business to MME, and the request of activating business includes called number；
MME sends call request to caller MSC, and the call request includes called number；
Caller MSC obtains called number ownership MSC roaming mobile number and status information, and status information is sent to
MME；
The status information of called number is sent to mobile terminal by MME.
Preferably, before mobile terminal initiates calling service, this method is further comprising the steps of:
Mobile terminal sends to eNB after the completion of combining attachment and obtains the request for falling community configured information after rise；
ENB, which is sent, falls community configured information after rise to mobile terminal；
Mobile terminal carries out falling cell measurement according to community configured information is fallen after rise, and saves wherein that measuring signal is preferably
Several falling subdistrict frequency point information.
Preferably, mobile terminal falls the domain CS after rise and carries out calling and specifically includes:
Mobile terminal is sent to MME falls cell information after rise, and is fallen after rise according to the falling subdistrict frequency point information of preservation；
After falling after rise successfully, mobile terminal sends call request to caller MSC；
When mobile terminal receives the ringback tone information of caller MSC transmission, then it is changed to ongoing prompt tone is called
Ring-back tone.
Further, the present invention also provides a kind of CSFB calling system, including mobile terminal, MME and caller MSC,
Mobile terminal is when initiating calling service, for sending request of activating business, the request packet of activating business to MME
Include called number；
MME, the request of activating business for being sent according to mobile terminal send call request, the calling to caller MSC
Request includes called number；
Caller MSC, for obtaining called number ownership MSC roaming mobile number and status information, and by called number
Status information is sent to MME；
MME is also used to the status information of called number being sent to mobile terminal；
Mobile terminal is also used to carry out below step according to the status information of the called number of acquisition:
When the status information of called number is to shut down or not in the area of coverage, play corresponding prompt tone, and do not fall CS after rise
Domain；
When the status information of called number is normal condition, plays and call ongoing prompt tone, and fall the domain CS after rise
And it is called.
Preferably, mobile terminal includes prompt tone module and processing module,
Prompt tone module, the status information for the called number according to acquisition is shutdown or the broadcasting pair not in the area of coverage
The prompt tone answered, and, the status information for the called number according to acquisition is carrying out to play calling when normal condition
Prompt tone；
Processing module for sending request of activating business to MME, and is used for the status information of the called number according to acquisition
For shutdown or not in the area of coverage, instruction mobile terminal does not fall the domain CS after rise；And for the state according to the called number of acquisition
When information is normal condition, instruction mobile terminal falls the domain CS after rise and is called.
Preferably, processing module is also used to the message completed according to the joint attachment of mobile terminal, obtains back to eNB transmission
The request of community configured information is fallen, and,
For the falling community configured information according to acquisition, falling cell measurement is carried out, and saves measuring signal preferably
Several falling subdistrict frequency point information.
Preferably, processing module instruction mobile terminal fall after rise the domain CS and carry out calling specifically include: processing module be used for
MME, which is sent, falls cell information after rise, and indicates that mobile terminal is fallen after rise according to the falling subdistrict frequency point information of preservation；And it is used for
According to the successful message of the falling of acquisition, call request is sent to caller MSC；
Prompt tone module is also used to receive the ringback tone information of caller MSC transmission, and will be called just according to ringback tone information
Ring-back tone is changed in the prompt tone of progress.
Further, the present invention also provides a kind of mobile terminal, the mobile terminal when initiating calling service, for
MME sends request of activating business, and the request of activating business includes called number；
It is also used to receive the status information of the called number of MME transmission；
And for carrying out below step according to the status information of called number:
When the status information of called number is to shut down or not in the area of coverage, return for playing corresponding prompt tone, and not
Fall the domain CS；
When the status information of called number is normal condition, ongoing prompt tone is called for playing, and fall after rise
The domain CS is simultaneously called.
The beneficial effects of the present invention are: CSFB caller method, system and mobile terminal in the present invention, due to mobile terminal
When initiating calling service, request of activating business is sent to MME, MME sends call request to caller MSC, and caller MSC obtains quilt
It is number home MSC roaming mobile number and status information, and status information is sent to MME, MME is by received called number
Status information be sent to mobile terminal, mobile terminal plays corresponding prompt tone according to status information, so that working as calling subscriber
Prompt tone is heard for shutdown or not in the area of coverage, and calling subscriber can select direct on-hook；When calling subscriber is hearing calling
The prompt tone of progress can then hear ring-back tone prompt tone, and in this calling procedure, calling subscriber not will be considered that network signal
It is bad and hang up the telephone and call again, so as to promote user experience.In addition, when calling subscriber hear prompt tone for shutdown or
Not in the area of coverage, calling subscriber's on-hook, and since mobile terminal does not fall the domain CS after rise, it avoids calling subscriber and is falling after rise and returning
In the process, the problem of paging is not received.
Detailed description of the invention
Fig. 1 is the CSFB caller method flow diagram that the embodiment of the present invention 1 provides；
Fig. 2 is the CSFB caller method flow diagram that the embodiment of the present invention 2 provides；
Fig. 3 is the CSFB calling system structural schematic diagram that the embodiment of the present invention 4 provides.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawings and examples to this
Invention CSFB caller method, system and mobile terminal are described in further detail.
Embodiment 1:
As shown in Figure 1, the present embodiment provides a kind of CSFB caller methods, comprising:
Mobile terminal initiates calling service, and carries out below step according to the status information of the called number of acquisition:
When the status information of called number be shutdown or not in the area of coverage, the corresponding prompt tone of mobile terminal playing, and
Mobile terminal does not fall the domain CS after rise；
When the status information of called number is normal condition, mobile terminal playing calls ongoing prompt tone, and
Mobile terminal falls the domain CS after rise and is called.
Embodiment 2:
As shown in Figure 1, 2, a kind of CSFB caller method is disclosed in the present embodiment, and wherein mobile terminal has a 4G multimode
Card, 4G multimode card select CSFB technology to realize voice communication.
Described method includes following steps:
Step 101, after mobile terminal-opening, start 4G multimode card joint attachment flow；
Joint attachment flow is specially the 4G multimode card of mobile terminal to MME transmission Attach Request message, wherein
Parameter Attach Type indicates that this is a united EPS/IMSI attachment flow, and parameter instruction mobile terminal has CS
Fallback ability, MME send SGsAP-LOCATION-UPDATE-REQUEST message to corresponding VLR, include in message
The parameters such as new LAI, IMSI, MME name of 4G multimode card and Location Update Type, VLR store MME information, and
Creation is associated with the SGs of 4G multimode card under MME, and VLR initiates the 4G multimode card for arriving HLR according to user information and location area information
Position update flow, VLR return to confirmation message and send Attach Accept message to mobile terminal to MME, MME, complete joint
Attachment.
Step 102, mobile terminal send to eNB after the completion of combining attachment and obtain the request for falling community configured information after rise；
ENB, which is sent, falls community configured information after rise to mobile terminal；Mobile terminal carries out falling cell survey after rise according to community configured information is fallen after rise
Amount, and save the wherein preferably several falling subdistrict frequency point information of measuring signal；
Step 103, when mobile terminal initiates calling service, activate business request to MME transmission, request packet of activating business
Include called number；
Step 104, MME send call request to caller MSC, and call request includes called number；
Step 105, caller MSC obtain called number ownership MSC roaming mobile number and status information, and by called number
Status information be sent to MME；
In the present embodiment, the call request information that caller MSC is sent according to MME obtains quilt to the corresponding HLR of called number
Code of calling out the numbers be presently in MSC roaming mobile number and status information, wherein the status information of called number may is that pass
Machine, not in the area of coverage, normal condition etc..
The status information of received called number is sent to mobile terminal by step 106, MME；
Step 107, mobile terminal carry out below step according to the status information of the called number of acquisition:
When the status information of called number be shutdown or not in the area of coverage, the corresponding prompt tone of mobile terminal playing, and
Mobile terminal does not fall the domain CS after rise；
When the status information of called number is normal condition, mobile terminal playing calls ongoing prompt tone, and
Mobile terminal falls the domain CS after rise and is called.
In the present embodiment, when the status information of the called number of acquisition is shutdown, the prompt tone of mobile terminal playing is " right
Side shut down " prompt tone；When the status information of the called number of acquisition is not in the area of coverage, the prompt tone of mobile terminal playing
For the prompt tone of " other side is not in the area of coverage ".
When calling subscriber hears that other side has shut down or other side is not in the prompt tone of the area of coverage, call can not be established by learning, be led to
Often meeting on-hook, therefore mobile terminal does not fall the domain CS after rise, still resides in LTE network.
When the status information of the called number of acquisition is normal condition, mobile terminal playing " calling is carrying out " is mentioned
Show sound, and mobile terminal falls the domain CS after rise and called.
Step 108, mobile terminal to MME send fall after rise cell information, and according to the falling subdistrict frequency point information of preservation into
Row is fallen after rise；After falling after rise successfully, mobile terminal sends call request to caller MSC；It is sent when mobile terminal receives caller MSC
Ringback tone information, then be changed to ring-back tone ongoing prompt tone is called.
In the present embodiment, when the called number of acquisition for mobile terminal is the information of normal condition, is sent to MME and fall cell after rise
Message, and fallen after rise according to the falling subdistrict frequency point information of preservation；After falling after rise successfully, mobile terminal is sent to caller MSC
Establish call request；Caller MSC according to the called number of acquisition be presently in MSC roam mobile number to called MS C send out
Send setup requests；Called MS C sends call request, dialed terminal bell to called number, and called terminal is sent out to called MS C
Ring response message is sent, called MS C sends called terminal ringing response message to caller MSC, and caller MSC sends ring-back to mobile terminal
Message breath will then call ongoing prompt tone and be changed to ring-back when the ringback tone information that mobile terminal reception caller MSC is sent
Sound.
In the CSFB caller method that embodiment 1 and embodiment 2 provide, mobile terminal is saved and is surveyed after completing joint attachment
The optimal several falling subdistrict frequency point information of signal are measured, which can be reduced the subsequent carry out cell of mobile terminal to a certain extent
Duration when falling.When mobile terminal initiates calling service, request of activating business is sent to MME, MME is sent to caller MSC
Call request, caller MSC obtains called number ownership MSC roaming mobile number and status information, and status information is sent to
The status information of received called number is sent to mobile terminal by MME, MME, and mobile terminal is played according to status information and corresponded to
Prompt tone so that calling subscriber hear prompt tone be " other side has shut down " or " other side is not in the area of coverage " when, calling subscriber hang
Machine, mobile terminal do not fall the domain CS after rise, compared with prior art calling subscriber need to first be fallen after rise and carry out call request again, it is mobile eventually
The domain CS is not fallen at end after rise, then avoidable terminal in the prior art is the problem of falling after rise with paging is not received in return course.
When the prompt tone that calling subscriber hears " calling is carrying out ", mobile terminal carries out cell falling at this time, fall after rise at
After function, mobile terminal establishes call request to caller MSC sending, and receives the ring-back tone of caller MSC return, then will call
The prompt tone of progress is changed to ring-back tone, therefore sends the ring-back that request of activating business is returned to reception caller MSC in mobile terminal
Between sound, there is the prompt tone prompt calling subscriber of " calling is carrying out " always, silent sound is substituted, so that calling subscriber will not recognize
For network signal is bad and hangs up the telephone and calls again, to promote user experience.
Embodiment 3:
The present embodiment provides a kind of CSFB calling system, including mobile terminal, MME and caller MSC,
For mobile terminal when initiating calling service, for sending request of activating business to MME, request of activating business includes quilt
It calls out the numbers code；
MME, the request of activating business for being sent according to mobile terminal send call request, call request to caller MSC
Including called number；
Caller MSC, for obtaining called number ownership MSC roaming mobile number and status information, and by called number
Status information is sent to MME；
MME is also used to the status information of called number being sent to mobile terminal；
Mobile terminal is also used to carry out below step according to the status information of the called number of acquisition:
When the status information of called number is to shut down or not in the area of coverage, play corresponding prompt tone, and do not fall CS after rise
Domain；
When the status information of called number is normal condition, plays and call ongoing prompt tone, and fall the domain CS after rise
And it is called.
Embodiment 4:
As shown in figure 3, the present embodiment discloses a kind of CSFB calling system, including mobile terminal, wherein mobile terminal has
One 4G multimode card, and 4G multimode card selection CSFB technology realizes voice communication, which further includes MME, caller MSC,
When the 4G multimode of mobile terminal is stuck in initiation calling service, mobile terminal is used for request of activating business to MME transmission,
Request of activating business includes called number；
MME, the request of activating business for being sent according to mobile terminal send call request, call request to caller MSC
Including called number；
Caller MSC, for obtaining called number ownership MSC roaming mobile number and status information, and by called number
Status information is sent to MME；
In the present embodiment, caller MSC is used for the call request information sent according to MME, obtains to the corresponding HLR of called number
Take called number be presently in MSC roaming mobile number and status information, and status information is sent to MME.
MME is also used to the status information of called number being sent to mobile terminal；
Mobile terminal is also used to carry out below step according to the status information of the called number of acquisition:
When the status information of called number is to shut down or not in the area of coverage, play corresponding prompt tone, and do not fall CS after rise
Domain；
When the status information of called number is normal condition, the prompt tone of broadcasting, and fall the domain CS after rise and called.
Specifically, mobile terminal includes prompt tone module 11, and the status information for the called number according to acquisition is to close
Machine does not play corresponding prompt tone in the area of coverage, and, the status information for the called number according to acquisition is normal
It is played when state and calls ongoing prompt tone；
In the present embodiment, the status information of called number can be shutdown, not in the area of coverage, normal condition etc..Prompt tone
Module 11 is when shutting down, for playing the prompt tone of " other side has shut down " according to the status information of the called number of acquisition；Or
It is not in the area of coverage, for playing the prompt tone of " other side is not in the area of coverage " according to the status information of the called number of acquisition；
And when according to the status information of the called number of acquisition being normal condition, for playing the prompt tone of " calling is carrying out ".
Specifically, mobile terminal further includes processing module 12, for sending request of activating business to MME, and is used for basis
The status information of the called number of acquisition is to shut down or not in the area of coverage, indicate that mobile terminal does not fall the domain CS after rise；And it is used for
According to the status information of the called number of acquisition be normal condition when, instruction mobile terminal fall after rise the domain CS simultaneously called.
In the present embodiment, the status information that processing module 12 directly reads the called number of acquisition for mobile terminal can be,
It is also possible to the status information that processing module 12 receives the called number that MME is sent, preferably the first acquisition modes.It needs to illustrate
, after calling subscriber hears the prompt tone of " other side has shut down " or " other side is not in the area of coverage ", learn can not with it is called
User establishes call connection, it will usually it hangs up the telephone, therefore mobile terminal does not need to fall after rise to 2/3G network, therefore processing module 12
Instruction mobile terminal does not fall the domain CS after rise, and mobile terminal still can reside in LTE network.
Processing module 12 is also used to combine the message that attachment is completed according to the mobile terminal of acquisition, obtains back to eNB transmission
The request of community configured information is fallen, and, for the falling community configured information according to acquisition, falling cell measurement is carried out, and
Save the preferably several falling subdistrict frequency point information of measuring signal.
When processing module 12 indicates that mobile terminal falls the domain CS after rise and called, processing module 12 is used to send to MME
It falls cell information after rise, and indicates that mobile terminal is fallen after rise according to the falling subdistrict frequency point information of preservation；And it is obtained for basis
The mobile terminal taken falls successful message after rise, sends call request to caller MSC；
Prompt tone module 11 is also used to receive the ringback tone information of caller MSC transmission, and will be called according to ringback tone information
Ongoing prompt tone is changed to ring-back tone.
In the present embodiment, it can be prompt tone module 11 and directly receive the ringback tone information that caller MSC is sent, be also possible to
Prompt tone module 11 directly reads the ringback tone information that the received caller MSC of mobile terminal is sent, preferably the first situation.
In the CSFB calling system that embodiment 3 and embodiment 4 provide, mobile terminal includes prompt tone module 11 and processing mould
Block 12, prompt tone module 11 are used to play corresponding prompt tone according to the status information of the called number of acquisition.Processing module 12,
For completing the message of joint attachment according to the mobile terminal of acquisition, the preferably several falling subdistrict frequency point letters of measuring signal are saved
Breath, can be reduced to a certain extent mobile terminal it is subsequent carry out cell falling when duration.When mobile terminal initiates calling service
When, processing module 12 is used for request of activating business to MME transmission, and MME is used to send call request to caller MSC, and caller MSC is used
Mobile number and status information are roamed in obtaining called number ownership MSC, and the status information of called number is sent to MME,
MME is used to the status information of received called number being sent to mobile terminal, so that calling subscriber is hearing mobile terminal
When the prompt tone for " other side has shut down " or " other side is not in the area of coverage " that prompt tone module 11 plays, calling subscriber selects on-hook,
Processing module 12 is used to indicate mobile terminal and does not fall after rise.The domain CS is first fallen after rise with the mobile terminal of the prior art carries out calling phase again
Than, calling subscriber of the present invention meeting on-hook when call can not be established with other side by learning, then calling mobile terminal does not fall the domain CS after rise, because
This avoids calling subscriber the problem of falling after rise with paging is not received in return course.When calling subscriber hears that " calling is
The prompt tone of progress ", calling subscriber not will be considered that network signal is bad and hangs up the telephone and calls again, and processing module 12 is used at this time
Cell falling is carried out in instruction mobile terminal, after falling after rise successfully, processing module 12 is used to issue foundation calling to caller MSC and ask
It asks, the prompt tone module 11 of mobile terminal is used to receive the ring-back tone of caller MSC return, then the prompt that " will be called and carrying out "
Sound is changed to ring-back tone, therefore sends between the ring-back tone that request is returned to reception caller MSC of activating business in calling mobile terminal,
There is the prompt tone prompt calling subscriber of " calling is carrying out " always, the silent sound of the prior art is substituted, to promote user's body
It tests.
Embodiment 5:
The present embodiment provides a kind of mobile terminal, which is used for when initiating calling service, is sent and is extended to MME
Service request, request of activating business include called number；
It is also used to receive the status information of the called number of MME transmission；
And for carrying out below step according to the status information of called number:
When the status information of called number is to shut down or not in the area of coverage, play corresponding prompt tone, and do not fall CS after rise
Domain；
When the status information of called number is normal condition, plays and call ongoing prompt tone, and fall the domain CS after rise
And it is called.
In the present embodiment, specially mobile terminal is used for when initiating calling service, sends request of activating business to MME,
Request of activating business includes called number；MME is used to send call request to caller MSC, and call request includes called number；It is main
It cries MSC for obtaining called number ownership MSC roaming mobile number and status information, and the status information of called number is sent
To MME；MME is used to the status information of called number being sent to mobile terminal；Mobile terminal is used to receive the called of MME transmission
The status information of number.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a kind of CSFB caller method, which is characterized in that the described method includes:
Mobile terminal initiates calling service, and carries out below step according to the status information of the called number of acquisition:
When the status information of called number is shutdown or not in the area of coverage, the corresponding prompt tone of mobile terminal playing, and it is mobile
Terminal does not fall the domain CS after rise；
When the status information of called number is normal condition, mobile terminal playing calls ongoing prompt tone, and mobile
Terminal falls the domain CS after rise and is called.
2. CSFB caller method according to claim 1, which is characterized in that the state of acquisition for mobile terminal called number is believed
The step of breath, specifically includes:
Mobile terminal sends request of activating business to MME, and the request of activating business includes called number；
MME sends call request to caller MSC, and the call request includes called number；
Caller MSC obtains called number ownership MSC roaming mobile number and status information, and status information is sent to MME；
The status information of called number is sent to mobile terminal by MME.
3. CSFB caller method according to claim 2, which is characterized in that before mobile terminal initiates calling service,
The method also includes following steps:
Mobile terminal sends to eNB after the completion of combining attachment and obtains the request for falling community configured information after rise；
ENB, which is sent, falls community configured information after rise to mobile terminal；
Mobile terminal carries out falling cell measurement according to community configured information is fallen after rise, and it is preferably several to save wherein measuring signal
Fall subdistrict frequency point information after rise.
4. CSFB caller method according to claim 3, which is characterized in that mobile terminal falls the domain CS after rise and carries out calling tool
Body includes:
Mobile terminal is sent to MME falls cell information after rise, and is fallen after rise according to the falling subdistrict frequency point information of preservation；
After falling after rise successfully, mobile terminal sends call request to caller MSC；
When mobile terminal receives the ringback tone information of caller MSC transmission, then ring-back is changed to ongoing prompt tone is called
Sound.
5. a kind of CSFB calling system, which is characterized in that including mobile terminal, MME and caller MSC,
For mobile terminal when initiating calling service, for sending request of activating business to MME, the request of activating business includes quilt
It calls out the numbers code；
MME, the request of activating business for being sent according to mobile terminal send call request, the call request to caller MSC
Including called number；
Caller MSC, for obtaining called number ownership MSC roaming mobile number and status information, and by the state of called number
Information is sent to MME；
MME is also used to the status information of called number being sent to mobile terminal；
Mobile terminal is also used to carry out below step according to the status information of the called number of acquisition:
When the status information of called number is to shut down or not in the area of coverage, play corresponding prompt tone, and do not fall the domain CS after rise；
It when the status information of called number is normal condition, plays and calls ongoing prompt tone, and fall the domain CS after rise and go forward side by side
Row calling.
6. CSFB calling system according to claim 5, which is characterized in that the mobile terminal include prompt tone module and
Processing module,
Prompt tone module, the status information for the called number according to acquisition are shutdown or do not play in the area of coverage corresponding
Prompt tone, and, the status information for the called number according to acquisition calls ongoing mention to play when normal condition
Show sound；
Processing module, for sending request of activating business to MME, and the status information for the called number according to acquisition is to close
Machine or not in the area of coverage, instruction mobile terminal do not fall the domain CS after rise；And for the status information according to the called number of acquisition
When for normal condition, instruction mobile terminal falls the domain CS after rise and is simultaneously called.
7. CSFB calling system according to claim 6, which is characterized in that the processing module is also used to according to mobile whole
The message that the joint attachment at end is completed sends to eNB and obtains the request for falling community configured information after rise, and,
For the falling community configured information according to acquisition, falling cell measurement is carried out, and it is preferably several to save measuring signal
Fall subdistrict frequency point information after rise.
8. CSFB calling system according to claim 7, which is characterized in that
Processing module instruction mobile terminal, which falls the domain CS after rise and carries out calling, to be specifically included: processing module, which is used to send to MME, to be fallen after rise
Cell information, and indicate that mobile terminal is fallen after rise according to the falling subdistrict frequency point information of preservation；And for according to acquisition
It falls successful message after rise, sends call request to caller MSC；
Prompt tone module, be also used to receive caller MSC transmission ringback tone information, and according to ringback tone information will call into
Capable prompt tone is changed to ring-back tone.
9. a kind of mobile terminal, which is characterized in that described for sending request of activating business to MME when initiating calling service
Request of activating business includes called number；
It is also used to receive the status information of the called number of MME transmission；
And for carrying out below step according to the status information of called number:
When the status information of called number is to shut down or not in the area of coverage, play corresponding prompt tone, and do not fall the domain CS after rise；
It when the status information of called number is normal condition, plays and calls ongoing prompt tone, and fall the domain CS after rise and go forward side by side
Row calling.
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