CN106162623A - Method, device and the terminal of a kind of CSFB terminal speech call encryption - Google Patents
Method, device and the terminal of a kind of CSFB terminal speech call encryption Download PDFInfo
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- CN106162623A CN106162623A CN201510172757.3A CN201510172757A CN106162623A CN 106162623 A CN106162623 A CN 106162623A CN 201510172757 A CN201510172757 A CN 201510172757A CN 106162623 A CN106162623 A CN 106162623A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
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Abstract
The invention provides method, device and the terminal of a kind of CSFB terminal speech call encryption, wherein, a kind of method of CSFB terminal speech call encryption, it is applied to calling terminal, calling terminal is applicable to access the LTE network of the wireless frequency of 2G and 3G, and described method includes: start the flow process initiating voice encryption call to terminal called；Receive the redirection message that LTE network issues, the priority of 3G frequency is set above the priority of 2G frequency by described redirection message；Fall after rise to 3G community according to described redirection message, carry out voice encryption call.The present invention solves calling terminal and the terminal called problem that time delay is longer, reliability is relatively low and network needs transformation when carrying out voice encryption call.
Description
Technical field
The present invention relates to moving communicating field, especially relate to the side of a kind of CSFB terminal speech call encryption
Method, device and terminal.
Background technology
Transmitting due to network at present, GSM network cannot directly carry encryption voice, can only pass through 3G
Network is encrypted voice transfer, so require terminal for 4G terminal is carrying out End to End Encryption language
During sound communication, no matter how network configures terminal, automatically can carry out End to End Encryption on 3G network and lead to
Letter.Addressing that need, prior art is:
Utilize OTT (Over The Top, more top) business, note or USSD (Unstructured
Supplementary Service Data, unstructured supplementary data traffic scheme) carry out 3G patten transformation.
CSFB (Circuit Switched Fallback, circuit domain dropping) is that the 4G cell phone of current main flow solves
Scheme, due to carrier network strategy, during voice fallback, voice may be held by terminal
Being loaded in GSM network, in this case, terminal will be unable to hold encryption voice.
As it is shown in figure 1, for existing calling terminal and terminal called be encrypted communicate time state synchronized
Schematic diagram.
Existing technical scheme, although solve 4G terminal when being encrypted call, calling terminal and called
Terminal all can in the problem of 3G network, but there are the following problems for existing technical scheme:
1, network needs to transform.Use USSD or OTT scheme, need to increase new USSD
Or OTT server, or existing USSD server or OTT server are transformed,
By note scheme, then it is made without the network rebuilding.
2, speech scrambling setup delay is bigger.Before terminal is encrypted communication process, needs carry out the shortest
Letter notice, a SMS confirmation, and twice patten transformation.In this case, lead to than normal CSFB
Many more than 10 seconds of words time delay.
3, reliability is relatively low.Note/USSD/OTT, when carrying out message transmission, is public due to use
Channel transfer, or public service platform forwards, so when heavy traffic, it is possible to cause
Note/USSD/OTT message cannot be transmitted in time, thus causes speech scrambling failure.
Summary of the invention
In order to solve calling terminal and terminal called time delay be longer when carrying out voice encryption call, reliability relatively
Low and network needs the problem of transformation, the invention provides the side of a kind of CSFB terminal speech call encryption
Method, device and terminal.
In order to solve above-mentioned technical problem, the invention provides the side of a kind of CSFB terminal speech call encryption
Method, is applied to calling terminal, and described calling terminal is applicable to access the LTE network of the wireless frequency of 2G and 3G,
Described method includes:
Start the flow process initiating voice encryption call to terminal called；
Receive the redirection message that issues of LTE network, preferential by 3G frequency in described redirection message
Level is set above the priority of 2G frequency；
Fall after rise to 3G community according to described redirection message, carry out voice encryption call.
Optionally, described in described redirection message, the priority of 3G frequency is set above 2G frequency
Priority step in, described method also includes: simultaneously fills in described redirection message and can fall after rise
3G frequency.
Optionally, in described redirection message, fill the 3G frequency that can fall after rise the while of described, specifically include:
3G frequency in system message is filled to the 3G frequency that can fall after rise；And/or 3G frequency known to preset,
Described known 3G frequency is filled to the 3G frequency that can fall after rise.
Optionally, in described redirection message, the while of described, fill the 3G frequency that can fall after rise, particularly as follows:
Redirect the Freq Priority List UTRA-FDD field in message and Freq Priority List
UTRA-TDD field is filled the 3G frequency that can fall after rise.
Optionally, described according to described redirection message fall after rise to 3G community, carry out voice encryption call, tool
Body includes: carry out falling after rise the search of community according to described redirection message, if searching effective 3G frequency,
Then fall after rise to the 3G community searched, carry out voice encryption call；If search is less than effective 3G frequency,
Then voice encryption is conversed unsuccessfully.
According to another aspect of the present invention, additionally provide the method that the call of a kind of CSFB terminal speech is encrypted,
Being applied to terminal called, described terminal called is applicable to access the LTE network of the wireless frequency of 2G and 3G, institute
The method of stating includes:
Described LTE network receives the paging of calling terminal；
Receive the redirection message that issues of LTE network, preferential by 3G frequency in described redirection message
Level is set above the priority of 2G frequency；
Fall after rise to 3G community according to described redirection message, carry out voice encryption call.
Optionally, described in described redirection message, the priority of 3G frequency is set above 2G frequency
Priority step in, described method also includes: simultaneously fills in described redirection message and can fall after rise
3G frequency.
Optionally, in described redirection message, fill the 3G frequency that can fall after rise the while of described, specifically include:
3G frequency in system message is filled to the 3G frequency that can fall after rise；And/or 3G frequency known to preset,
Described known 3G frequency is filled to the 3G frequency that can fall after rise.
Optionally, in described redirection message, the while of described, fill the 3G frequency that can fall after rise, particularly as follows:
Redirect the Freq Priority List UTRA-FDD field in message and Freq Priority List
UTRA-TDD field is filled the 3G frequency that can fall after rise.
Optionally, described according to described redirection message fall after rise to 3G community, carry out voice encryption call, tool
Body includes: carry out falling after rise the search of community according to described redirection message, if searching effective 3G frequency,
Then fall after rise to the 3G community searched, carry out voice encryption call；If search is less than effective 3G frequency,
Then search 2G frequency, and fall after rise to the 2G cell searched.
According to another aspect of the present invention, additionally provide the device of a kind of CSFB terminal speech call encryption,
Being applied to access the calling terminal of the LTE network of the wireless frequency of 2G and 3G, described device includes: start mould
Block, for starting the flow process initiating voice encryption call to terminal called；First processing module, is used for receiving
The redirection message that LTE network issues, is set to height by the priority of 3G frequency in described redirection message
Priority in 2G frequency；Second processing module, for falling after rise to 3G community according to described redirection message,
Carry out voice encryption call.
Optionally, described first processing module is further used in described redirection message what filling can fall after rise
3G frequency.
Optionally, described first processing module is further used for being filled to return by the 3G frequency in system message
The 3G frequency fallen；And/or 3G frequency known to preset, it is filled to fall after rise by described known 3G frequency
3G frequency.
Optionally, described first processing module is further used for the Freq Priority in described redirection message
List UTRA-FDD field and Freq Priority List UTRA-TDD field are filled the 3G frequency that can fall after rise
Point.
Optionally, described second processing module is further used for, and carries out falling after rise little according to described redirection message
The search in district, if searching effective 3G frequency, then falling after rise to the 3G community searched, carrying out voice and adding
Close call；If search is less than effective 3G frequency, then voice encryption is conversed unsuccessfully.
According to another aspect of the present invention, additionally provide a kind of calling terminal, described calling terminal include with
The device of the upper described a kind of CSFB terminal speech call encryption being applied to calling terminal.
According to another aspect of the present invention, additionally provide the device of a kind of CSFB terminal speech call encryption,
Being applied to access the terminal called of the LTE network of the wireless frequency of 2G and 3G, described device includes: receive mould
Block, for receiving the paging of calling terminal in described LTE network；3rd processing module, is used for receiving
The redirection message that LTE network issues, is set to height by the priority of 3G frequency in described redirection message
Priority in 2G frequency；Fourth processing module, for falling after rise to 3G community according to described redirection message,
Carry out voice encryption call.
Optionally, described 3rd processing module is further used in described redirection message what filling can fall after rise
3G frequency.
Optionally, described 3rd processing module is further used for being filled to return by the 3G frequency in system message
The 3G frequency fallen；And/or 3G frequency known to preset, it is filled to fall after rise by described known 3G frequency
3G frequency.
Optionally, described 3rd processing module is further used for the Freq Priority in described redirection message
List UTRA-FDD field and Freq Priority List UTRA-TDD field are filled the 3G frequency that can fall after rise
Point.
Optionally, described fourth processing module is further used for, and carries out falling after rise little according to described redirection message
The search in district, if searching effective 3G frequency, then falling after rise to the 3G community searched, carrying out voice and adding
Close call；If search is less than effective 3G frequency, then search 2G frequency, and fall after rise to the 2G searched
Community.
According to another aspect of the present invention, additionally providing a kind of terminal called, described terminal called includes should
Device for a kind of CSFB terminal speech call encryption of terminal called.
The invention has the beneficial effects as follows:
The present invention is starting after terminal called initiates the flow process of voice encryption call, receives under LTE network
The redirection message sent out, and in redirecting message, the priority of 3G frequency is set above 2G frequency
Priority so that calling terminal falls after rise to 3G community according to redirecting message, carries out voice encryption call.This
Invent the priority priority higher than 2G frequency owing to setting 3G frequency in redirecting message, therefore
Calling terminal according to when redirecting community that message search falls after rise, can preferential image processor 3G community, and
Fall after rise to the 3G community searched, carry out voice encryption call.The present invention changes while network need not,
Time delay is longer and relatively low the asking of reliability when carrying out voice encryption call to solve calling terminal and terminal called
Topic.
Accompanying drawing explanation
Fig. 1 represent existing calling terminal and terminal called be encrypted communicate time state synchronized schematic diagram；
Fig. 2 represent embodiments of the invention are applied to calling terminal CSFB terminal speech call encryption
The key step flow chart of method；
Fig. 3 represent embodiments of the invention are applied to calling terminal CSFB terminal speech call encryption
The detailed step flow chart of method；
Fig. 4 represent embodiments of the invention are applied to terminal called CSFB terminal speech call encryption
The key step flow chart of method；
Fig. 5 represent embodiments of the invention are applied to terminal called CSFB terminal speech call encryption
The detailed step flow chart of method；
Fig. 6 represent embodiments of the invention are applied to calling terminal CSFB terminal speech call encryption
The structured flowchart of device；And
Fig. 7 represent embodiments of the invention are applied to terminal called CSFB terminal speech call encryption
The structured flowchart of device.
Detailed description of the invention
It is more fully described the exemplary embodiment of the disclosure below with reference to accompanying drawings.Although accompanying drawing shows
The exemplary embodiment of the disclosure, it being understood, however, that may be realized in various forms the disclosure and should be by
Embodiments set forth here is limited.On the contrary, it is provided that these embodiments are able to be best understood from this
Open, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
The present invention carries out pretreatment by counterweight directed message so that calling terminal and terminal called can be autonomous
Search 3G frequency, thus it is longer with reliability relatively to solve calling terminal time delay when initiating voice encryption call
Low problem.But at this it should be noted that the present invention is applicable to CSFB network uses R8 scheme, network
Simply appointment 2/3G wireless access frequency, and situation during 2/3G network core net altogether.
As in figure 2 it is shown, converse for embodiments of the invention are applied to the CSFB terminal speech of calling terminal
The key step flow chart of the method for encryption, mainly comprises the steps:
Step S101, starts the flow process initiating voice encryption call to terminal called.
In this step, calling terminal confirm initiate voice call be voice encryption call, then start to
Terminal called initiates the flow process of voice encryption call.
Step S102, receives the redirection message that LTE network issues, by 3G frequency in redirecting message
Priority be set above the priority of 2G frequency.
In this step, calling terminal receives the redirection message that LTE network issues, and is redirecting message
The middle priority by 3G frequency is set above the priority of 2G frequency.Concrete, setting priority
Before Shun Xu, the 3G frequency that calling terminal can fall after rise can be filled in redirecting message.
Step S103, falls after rise to 3G community according to redirecting message, carries out voice encryption call.
In this step, calling terminal falls after rise to 3G community according to redirecting message, carries out voice encryption call.
Calling terminal carries out the search of falling community according to redirecting message, has set owing to redirecting in message
The priority of 3G frequency is higher than the priority of 2G frequency, the therefore effective 3G of calling terminal first image processor
Frequency, when calling terminal searches effective 3G frequency, calling terminal falls after rise to the 3G community searched,
Carry out voice encryption call.
As it is shown on figure 3, converse for embodiments of the invention are applied to the CSFB terminal speech of calling terminal
The detailed step flow chart of the method for encryption, comprises the steps:
Step S101, starts the flow process initiating voice encryption call to terminal called.
In this step, calling terminal confirm initiate voice call be voice encryption call, then start to
Terminal called initiates the flow process of voice encryption call.Concrete, if calling terminal initiation is not voice encryption
Call, then calling terminal has only to carry out falling after rise according to the configuration of existing LTE network.
Step S1021, receives the redirection message that LTE network issues.
Step S1022, fills the 3G frequency that can fall after rise in redirecting message.
In this step, the 3G frequency in system message can be filled in redirection message by calling terminal,
As the 3G frequency that can fall after rise, concrete, this system message is the system message of LTE network.Additionally,
Calling terminal can also be by first preset known 3G frequency, such as China Mobile TDS frequency etc. of arranging net
The 3G frequency known, is then filled into preset known 3G frequency in redirection message, as falling after rise
3G frequency.It addition, calling terminal can also be by the 3G frequency in system message and known 3G frequency
Combine and be filled in redirection message, as the 3G frequency that can fall after rise.Concrete, calling terminal can be at weight
Freq Priority List UTRA-FDD field in directed message and Freq Priority List UTRA-TDD
Field is filled the 3G frequency that can fall after rise.
Step S1023, is set above the priority of 2G frequency by the priority of 3G frequency.
In this step so that calling terminal can image processor 3G frequency, calling terminal redirect
The priority of 3G frequency is set above the priority of 2G frequency by message.
Step S1031, carries out falling after rise the search of community according to redirection message, if searching effective 3G frequency
Point, then fall after rise to the 3G community searched, carry out voice encryption call；If searching for less than effective 3G frequency
Point, then voice encryption is conversed unsuccessfully.
In this step, calling terminal carries out falling after rise the search of community according to the redirection message after processing, i.e.
According to filling 3G frequency and the priority of 3G frequency being set above the resetting of priority of 2G frequency
Carry out falling after rise the search of community to message.If calling terminal searches effective 3G frequency, then calling terminal returns
Drop down onto the 3G community searched, carry out voice encryption call；If calling terminal does not search effective 3G
Frequency, then voice encryption is conversed unsuccessfully.
The present invention according to filling 3G frequency and the redirection message image processor 3G frequency after arranging priority,
Shorten calling terminal initiate voice encryption call time time, and improve voice encryption call can
By property.
As shown in Figure 4, for embodiments of the invention are applied to the CSFB terminal speech call of terminal called
The key step flow chart of the method for encryption, comprises the steps:
Step S201, receives the paging of calling terminal on an LTE network.
In this step, terminal called receives the paging of calling terminal on an LTE network.
Step S202, receives the redirection message that LTE network issues, by 3G frequency in redirecting message
Priority be set above the priority of 2G frequency.
In this step, concrete, terminal called first initiates Extend-service-Request to LTE network
Message, then receive the redirections message that issues of LTE network and in redirection message excellent by 3G frequency
First level is set above the priority of 2G frequency.Concrete, before setting the order of priority, Ke Yi
Redirect and message is filled the 3G frequency that terminal called can fall after rise.
Step S203, falls after rise to 3G community according to redirecting message, carries out voice encryption call.
In this step, terminal called falls after rise to 3G community according to redirecting message, carries out voice encryption call.
Terminal called carries out the search of falling community according to redirecting message, has set owing to redirecting in message
The priority of 3G frequency is higher than the priority of 2G frequency, the therefore effective 3G of terminal called first image processor
Frequency, when terminal called searches effective 3G frequency, terminal called falls after rise to the 3G community searched,
Carry out voice encryption call.
As it is shown in figure 5, converse for embodiments of the invention are applied to the CSFB terminal speech of terminal called
The detailed step flow chart of the method for encryption, mainly comprises the steps:
Step S201, receives the paging of calling terminal on an LTE network.
In this step, in this step, terminal called receives the paging of calling terminal on an LTE network.
Step S2021, receives the redirection message that LTE network issues.
In this step, concrete, terminal called first initiates Extend-service-Request to LTE network
Message, then receives the redirection message that LTE network issues.
Step S2022, fills the 3G frequency that can fall after rise in redirecting message.
In this step, the 3G frequency in system message can be filled in redirection message by terminal called,
As the 3G frequency that can fall after rise, concrete, this system message is the system message of LTE network.Additionally,
Terminal called can also be by first preset known 3G frequency, such as China Mobile TDS frequency etc. of arranging net
The 3G frequency known, is then filled into preset known 3G frequency in redirection message, as falling after rise
3G frequency.It addition, terminal called can also be by the 3G frequency in system message and known 3G frequency
Combine and be filled in redirection message, as the 3G frequency that can fall after rise.Concrete, terminal called can be at weight
Freq Priority List UTRA-FDD field in directed message and Freq Priority List UTRA-TDD
Field is filled 3G frequency.
Step S2023, is set above the priority of 2G frequency by the priority of 3G frequency.
In this step so that terminal called can image processor 3G frequency, terminal called redirect
The priority of 3G frequency is set above the priority of 2G frequency by message.
Step S2031, carries out falling after rise the search of community according to redirection message, if searching effective 3G frequency
Point, then fall after rise to the 3G community searched, carry out voice encryption call；If searching for less than effective 3G frequency
Point, then search 2G frequency, and fall after rise to the 2G cell searched.
In this step, terminal called carries out falling after rise the search of community according to the redirection message after processing, i.e.
According to filling 3G frequency and the priority of 3G frequency being set above the resetting of priority of 2G frequency
Carry out falling after rise the search of community to message.If terminal called searches effective 3G frequency, then terminal called returns
Drop down onto the 3G community searched, carry out voice encryption call；If terminal called does not search effective 3G
Frequency, then terminal called falls after rise according to the configuration of existing LTE network, i.e. search 2G frequency, and returns
Fall the 2G cell searched.
As shown in Figure 6, for embodiments of the invention are applied to the CSFB terminal speech call of calling terminal
The structured flowchart of the device of encryption, device includes:
Start module 301, for starting the flow process initiating voice encryption call to terminal called；
First processing module 302, for receiving the redirection message that LTE network issues, is redirecting message
The middle priority by 3G frequency is set above the priority of 2G frequency；
Second processing module 303, for falling after rise to 3G community according to redirection message, carries out voice encryption and leads to
Words.
Optionally, the first processing module 302 is further used for filling the 3G frequency that can fall after rise in redirecting message
Point.
Optionally, the first processing module 302 is further used for being filled to return by the 3G frequency in system message
The 3G frequency fallen；And/or 3G frequency known to preset, known 3G frequency is filled to the 3G that can fall after rise
Frequency.
Optionally, the first processing module 302 is further used for the Freq Priority List in redirecting message
UTRA-FDD field and Freq Priority List UTRA-TDD field are filled the 3G frequency that can fall after rise.
Optionally, the second processing module 303 is further used for, and carries out falling community after rise according to redirecting message
Search, if searching effective 3G frequency, then falls after rise to the 3G community searched, and carries out voice encryption and leads to
Words；If search is less than effective 3G frequency, then voice encryption is conversed unsuccessfully.
According to another aspect of the present invention, additionally providing a kind of calling terminal, this calling terminal includes should
Device for the CSFB terminal speech call encryption of calling terminal.
As it is shown in fig. 7, converse for embodiments of the invention are applied to the CSFB terminal speech of terminal called
The structured flowchart of the device of encryption, device includes:
Receiver module 401, for receiving the paging of calling terminal on an LTE network；
3rd processing module 402, for receiving the redirection message that LTE network issues, is redirecting message
The middle priority by 3G frequency is set above the priority of 2G frequency；
Fourth processing module 403, for falling after rise to 3G community according to redirection message, carries out voice encryption and leads to
Words.
Optionally, the 3rd processing module 402 is further used for filling the 3G frequency that can fall after rise in redirecting message
Point.
Optionally, the 3rd processing module 402 is further used for being filled to return by the 3G frequency in system message
The 3G frequency fallen；And/or 3G frequency known to preset, known 3G frequency is filled to the 3G that can fall after rise
Frequency.
Optionally, the 3rd processing module 402 is further used for the Freq Priority List in redirecting message
UTRA-FDD field and Freq Priority List UTRA-TDD field are filled the 3G frequency that can fall after rise.
Optionally, fourth processing module 403 is further used for, and carries out falling community after rise according to redirecting message
Search, if searching effective 3G frequency, then falls after rise to the 3G community searched, and carries out voice encryption and leads to
Words；If search is less than effective 3G frequency, then search 2G frequency, and fall after rise to the 2G cell searched.
According to another aspect of the present invention, additionally providing a kind of terminal called, this terminal called includes should
Device for the CSFB terminal speech call encryption of terminal called.
Above-described is the preferred embodiment of the present invention, it should be pointed out that for the ordinary people of the art
For Yuan, some improvements and modifications can also be made under without departing from principle premise of the present invention, these
Improvements and modifications are the most within the scope of the present invention.
Claims (22)
1. a method for circuit domain dropping CSFB terminal speech call encryption, is applied to calling terminal, institute
State calling terminal and be applicable to access the LTE network of the wireless frequency of 2G and 3G, it is characterised in that described method
Including:
Start the flow process initiating voice encryption call to terminal called；
Receive the redirection message that issues of LTE network, preferential by 3G frequency in described redirection message
Level is set above the priority of 2G frequency；
Fall after rise to 3G community according to described redirection message, carry out voice encryption call.
Method the most according to claim 1, it is characterised in that described general in described redirection message
In the step of the priority that the priority of 3G frequency is set above 2G frequency, described method also includes:
In described redirection message, fill the 3G frequency that can fall after rise simultaneously.
Method the most according to claim 2, it is characterised in that in described redirection message while of described
The 3G frequency that middle filling can fall after rise, specifically includes:
3G frequency in system message is filled to the 3G frequency that can fall after rise；And/or
Preset known 3G frequency, is filled to the 3G frequency that can fall after rise by described known 3G frequency.
Method the most according to claim 2, it is characterised in that in described redirection message while of described
The 3G frequency that middle filling can fall after rise, particularly as follows:
Freq Priority List UTRA-FDD field in redirecting message and Freq Priority List
UTRA-TDD field is filled the 3G frequency that can fall after rise.
Method the most according to claim 1, it is characterised in that described return according to described redirection message
Drop down onto 3G community, carry out voice encryption call, specifically include:
Carrying out falling after rise the search of community according to described redirection message, if searching effective 3G frequency, then returning
Drop down onto the 3G community searched, carry out voice encryption call；If search is less than effective 3G frequency, then language
Sound speech scrambling failure.
6. a method for CSFB terminal speech call encryption, is applied to terminal called, described terminal called
It is applicable to access the LTE network of the wireless frequency of 2G and 3G, it is characterised in that described method includes:
Described LTE network receives the paging of calling terminal；
Receive the redirection message that issues of LTE network, preferential by 3G frequency in described redirection message
Level is set above the priority of 2G frequency；
Fall after rise to 3G community according to described redirection message, carry out voice encryption call.
Method the most according to claim 6, it is characterised in that described general in described redirection message
In the step of the priority that the priority of 3G frequency is set above 2G frequency, described method also includes:
In described redirection message, fill the 3G frequency that can fall after rise simultaneously.
Method the most according to claim 7, it is characterised in that in described redirection message while of described
The 3G frequency that middle filling can fall after rise, specifically includes:
3G frequency in system message is filled to the 3G frequency that can fall after rise；And/or
Preset known 3G frequency, is filled to the 3G frequency that can fall after rise by described known 3G frequency.
Method the most according to claim 7, it is characterised in that in described redirection message while of described
The 3G frequency that middle filling can fall after rise, particularly as follows:
Freq Priority List UTRA-FDD field in redirecting message and Freq Priority List
UTRA-TDD field is filled the 3G frequency that can fall after rise.
Method the most according to claim 6, it is characterised in that described return according to described redirection message
Drop down onto 3G community, carry out voice encryption call, specifically include:
Carrying out falling after rise the search of community according to described redirection message, if searching effective 3G frequency, then returning
Drop down onto the 3G community searched, carry out voice encryption call；If search is less than effective 3G frequency, then search
Rope 2G frequency, and fall after rise to the 2G cell searched.
The device of 11. 1 kinds of CSFB terminal speech call encryptions, is applied to access the wireless frequency of 2G and 3G
The calling terminal of LTE network, it is characterised in that described device includes:
Start module, for starting the flow process initiating voice encryption call to terminal called；
First processing module, for receiving the redirection message that LTE network issues, in described redirection message
The middle priority by 3G frequency is set above the priority of 2G frequency；
Second processing module, for falling after rise to 3G community according to described redirection message, carries out voice encryption and leads to
Words.
12. devices according to claim 11, it is characterised in that described first processing module is further
For filling the 3G frequency that can fall after rise in described redirection message.
13. devices according to claim 12, it is characterised in that described first processing module is further
For the 3G frequency being filled to fall after rise by the 3G frequency in system message；And/or 3G frequency known to preset
Point, is filled to the 3G frequency that can fall after rise by described known 3G frequency.
14. devices according to claim 12, it is characterised in that described first processing module is further
For the Freq Priority List UTRA-FDD field in described redirection message and Freq Priority
List UTRA-TDD field is filled the 3G frequency that can fall after rise.
15. devices according to claim 11, it is characterised in that described second processing module is further
For, carry out falling after rise the search of community according to described redirection message, if searching effective 3G frequency, then
Fall after rise to the 3G community searched, carry out voice encryption call；If search is less than effective 3G frequency, then
Voice encryption is conversed unsuccessfully.
16. 1 kinds of calling terminals, it is characterised in that described calling terminal includes as arbitrary in claim 11～15
The device of a kind of CSFB terminal speech call encryption described in Xiang.
The device of 17. 1 kinds of CSFB terminal speech call encryptions, is applied to access the wireless frequency of 2G and 3G
The terminal called of LTE network, it is characterised in that described device includes:
Receiver module, for receiving the paging of calling terminal in described LTE network；
3rd processing module, for receiving the redirection message that LTE network issues, in described redirection message
The middle priority by 3G frequency is set above the priority of 2G frequency；
Fourth processing module, for falling after rise to 3G community according to described redirection message, carries out voice encryption and leads to
Words.
18. devices according to claim 17, it is characterised in that described 3rd processing module is further
For filling the 3G frequency that can fall after rise in described redirection message.
19. devices according to claim 18, it is characterised in that described 3rd processing module is further
For the 3G frequency being filled to fall after rise by the 3G frequency in system message；And/or 3G frequency known to preset
Point, is filled to the 3G frequency that can fall after rise by described known 3G frequency.
20. devices according to claim 18, it is characterised in that described 3rd processing module is further
For the Freq Priority List UTRA-FDD field in described redirection message and Freq Priority
List UTRA-TDD field is filled the 3G frequency that can fall after rise.
21. devices according to claim 17, it is characterised in that described fourth processing module is further
For, carry out falling after rise the search of community according to described redirection message, if searching effective 3G frequency, then
Fall after rise to the 3G community searched, carry out voice encryption call；If search is less than effective 3G frequency, then
Search 2G frequency, and fall after rise to the 2G cell searched.
22. 1 kinds of terminal calleds, it is characterised in that described terminal called includes as arbitrary in claim 17～21
The device of a kind of CSFB terminal speech call encryption described in Xiang.
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| CN106162623B (en) | 2020-02-14 |
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