CN105992294B - The processing method and processing device of circuit-switched service under user terminal and its LTE system - Google Patents
The processing method and processing device of circuit-switched service under user terminal and its LTE system Download PDFInfo
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Abstract
The processing method and processing device of circuit-switched service under user terminal and its LTE system, which comprises terminal resides under LTE network, issues CSFB request to network；If terminal does not receive the falling target frequency point of network-feedback within a preset time, judge whether terminal is stored with one or more and prestores frequency point；If terminal storage has one or more to prestore frequency point, terminal trial falls back to some and prestores under frequency point and be resident.Terminal of the present invention for CSFB technology under support LTE system, in the case where network does not respond the CSFB request of terminal sending, judge whether terminal is stored with one or more and prestores frequency point, if terminal storage has one or more to prestore frequency point, then terminal trial falls back to some and prestores under frequency point and be resident, reduce terminal and be forced to use the mode of network selection and be resident situation under 2G or 3G network, so as to increasing terminal in the scenario above from LTE network to 2G or the switch speed of 3G network.
Description
Technical field
The present invention relates to wireless communication technology fields, hand over more particularly to circuit under a kind of user terminal and its LTE system
Change the processing method and processing device of business.
Relational language is explained
UE --- User Equipment --- user terminal, abbreviation terminal；
LTE --- Long Term Evolution --- long term evolution；
3GPP --- the 3rd Generation Partnership Project --- third generation partner program；
UMTS --- Universal Mobile Telecommunications System --- universal mobile communications system
System；
OFDM --- Orthogonal Frequency Division Multiple --- orthogonal frequency division multiplexing；
MIMO --- Multi-Input&Multi-output --- multiple-input and multiple-output；
CS --- Circuit Switch --- circuit switching；
PS --- Packet Switch --- packet switch；
CSFB --- Circuit Switch FallBack --- circuit domain dropping；
WAP --- Wireless Application Protocol --- Wireless Application Protocol；
General land wirelessly connects UTRAN --- Universal Terrestrial Radio Access Network ---
Enter network；
GERAN——GSM EDGE Radio Access Network。
Background technique
LTE is the long term evolution for the UMTS technical standard organized to set up by 3GPP.LTE system introduces OFDM and MIMO etc.
Key technology significantly increases spectrum efficiency and message transmission rate.According to the difference of duplex mode, LTE system can be divided into
TD-LTE (Time Division Duplexing-LTE, TDD-LTE) and FDD-LTE (Frequency Division
Duplexing-LTE).The difference of the two is mainly reflected in the physical layer (frame structure, time-division are designed, synchronize) eated dishes without rice or wine, TD-
LTE system uplink and downlink is transmitted on different time slots using identical frequency range, the availability of frequency spectrum with higher, and FDD-LTE
System uplink and downlink then using pairs of UHF band reception and sends data.
Mobile communication business can be divided into CS business and PS business.Wherein, CS business mainly includes the (languages such as phone, short message
Sound telephone service and supplementary service), PS business mainly includes WAP, downloading etc..
It is well known that current LTE network is full PS network, therefore, it is only capable of supporting PS business and can not supporting CS
Business.However, will be weight within a very long time at present and from now on by the CS business of representative of voice telephone service
It wants and indispensable business.For this purpose, each normal structure is actively studied and proposes the solution party of CS business under a variety of LTE systems
Case, CSFB technology are a kind of solution of CS business under LTE system.
CSFB technology is one of the achievement of CS over PS research topic in 3GPP R8, it is intended to so that terminal is accessed in LTE
The CS such as voice telephone service business can be initiated down and receives the paging of the CS business such as voice telephone service, and can be right
Ongoing PS business carries out processing appropriate to terminal in the lte networks.
The core ideas of CSFB technology is: when needing to carry out CS business (such as initiate voice call caller or response
Voice call is called etc.), the circuit domain of 2G/3G is fallen back to from LTE network.
CSFB technology is suitable for the scene of 2G/3G circuit domain covering Chong Die with the wireless network of LTE, and main advantage is
Network structure is simple, does not need deployment IMS system, can efficiently use existing 2G/3G circuit-domain network.In construction LTE network
Initial stage can use the electricity of existing UTRAN/GERAN network if there has been mature UTRAN/GERAN network in operator
Road domain to provide CS business service to LTE system user.
Typical CSFB process specifically includes that joint attachment, location updating, caller/called CSFB process and attachment removal
Deng.Terminal issues CSFB request (request message of activating business) to network, and network is after the CSFB request for receiving terminal, usually
It can be fed back to terminal and carry the falling instruction message for falling target frequency point after rise, the falling target frequency point that terminal is indicated further according to network returns
Fall on progress CS business under 2G or 3G network.
CSFB process in the prior art will be indicated dependent on network.When network is abnormal because of various reasons,
It cannot respond to the CSFB request of terminal sending, in the case, falling target frequency point of the terminal due to lacking network-feedback, by nothing
Method is done directly CSFB process.
In the prior art, terminal is after issuing CSFB request, if not receiving the falling of network-feedback in preset time
Target frequency point then assert CSFB request failure.In the case, terminal is forced to attempt to be resident 2G or 3G by way of network selection
Network.
It is understood that 2G is resident by way of network selection or 3G network needs to spend the more time, it is this to do
Method is the equal of the inter-network switching process for not using CSFB technology, depending on the difference of network condition, it will usually spend 5~10 seconds very
To the more time.It is so prolonged to wait the user experience that seriously affect calling party, in practical applications, calling part user
When waiting 5~10 seconds still access failures, it could even be possible to abandoned call.
Summary of the invention
Technical problem solved by the present invention is the terminal for supporting CSFB technology under LTE system, does not respond end in network
In the case where the CSFB request that end issues, how to realize from LTE network to 2G or 3G network is switched fast.
In order to solve the above-mentioned technical problem, the embodiment of the present invention provides a kind of processing of circuit-switched service under LTE system
Method, comprising:
Terminal resides under LTE network, issues CSFB request to network；
Judge whether terminal receives the falling target frequency point of network-feedback within a preset time, wherein the falling mesh
Mark frequency point is to request to issue to terminal for the CSFB from network, the falling target frequency point can instruction terminal fall back to
Under the falling target frequency point, the falling target frequency point belongs to 2G or 3G network；
If terminal does not receive the falling target frequency point of network-feedback within a preset time, judge whether terminal is stored with
One or more prestores frequency point, wherein the frequency point that prestores is pre-stored；
If terminal storage has one or more to prestore frequency point, terminal trial falls back to some and prestores under frequency point and stay
It stays；
There is one or more to prestore frequency point if terminal is not stored, 2G or 3G is resident in terminal trial by way of network selection
Under network；
For terminal after being successfully resident under 2G or 3G network, processing circuit exchanges business.
Optionally, if terminal receives the falling target frequency point of network-feedback within a preset time, terminal is attempted to fall after rise
Under to the falling target frequency point and it is resident.
Optionally, if terminal receives the falling target frequency point of network-feedback, but the falling that fails within a preset time
It under to the falling target frequency point and is resident, then judges whether terminal is stored with one or more and prestores frequency point；
If terminal storage has one or more to prestore frequency point, terminal trial falls back to some and prestores under frequency point and stay
It stays；
There is one or more to prestore frequency point if terminal is not stored, 2G or 3G is resident in terminal trial by way of network selection
Under network；
For terminal after being successfully resident under 2G or 3G network, processing circuit exchanges business.
Optionally, terminal storage have it is multiple prestore frequency point, the multiple frequency point that prestores belongs to multiple networks.
Optionally, the terminal trial, which falls back to some and prestores under frequency point and be resident, is specifically: terminal trial is fallen back to
Some prestores under frequency point and is resident, and this prestores the LTE network that network belonging to frequency point is resident with terminal and belongs to identical fortune
Seek quotient.
Optionally, if terminal fail fall back to some prestore frequency point and be resident, terminal trial is fallen back to another
One prestores under frequency point and is resident.
Optionally, multiple frequency points that prestore belong to identical network if it exists, then will belong to the multiple of identical network and prestore frequency
Point is ranked up according to frequency point signal strength, successively attempts to be resident according to frequency point signal strength during falling.
Optionally, the multiple frequency point that prestores belongs to one or more of GSM or TD-SCDMA or WCDMA network.
Optionally, the frequency point that prestores stores for CSFB or stores or be directed to non-for other purposes
Specific purpose and store.
Optionally, it prestores under frequency point and is resident if terminal fails to fall back to, terminal is attempted by way of network selection
It is resident under 2G or 3G network.
Optionally, the circuit-switched service is voice telephone service and/or supplementary service.
In order to solve the above-mentioned technical problem, the embodiment of the present invention also provides a kind of place of circuit-switched service under LTE system
Device is managed, terminal, which can be stored in advance, prestores frequency point, and the frequency point that prestores belongs to 2G or 3G network, and the processing unit includes:
CSFB request unit, the first judging unit, second judgment unit, CSFB fall unit, network selection unit and Service Processing Unit after rise；Its
In:
CSFB request unit, resides under LTE network for terminal, issues CSFB request to network；
First judging unit, for judging that terminal is after the CSFB request unit issues CSFB request to network
The no falling target frequency point for receiving network-feedback within a preset time, wherein the falling target frequency point is directed to by network
The CSFB request to terminal issue, the falling target frequency point can instruction terminal fall back to the falling target frequency point
Under, the falling target frequency point belongs to 2G or 3G network；
Second judgment unit, it is anti-for judging that terminal does not receive network within a preset time in first judging unit
In the case where the falling target frequency point of feedback, judge whether terminal is stored with one or more and prestores frequency point, wherein described to prestore frequency
Point is pre-stored；
CSFB falls unit after rise, for judging that terminal storage has one or more to prestore frequency point in the second judgment unit
In the case of, terminal trial falls back to some and prestores under frequency point and be resident；
Network selection unit has one or more feelings for prestoring frequency point for judging that terminal is not stored in the second judgment unit
Under condition, terminal trial is resident under 2G or 3G network by way of network selection；
Service Processing Unit, for terminal after being successfully resident under 2G or 3G network, processing circuit exchanges business.
Optionally, the CSFB falls unit after rise, is also used to judge terminal within a preset time in first judging unit
In the case where the falling target frequency point for receiving network-feedback, terminal trial is fallen back under the falling target frequency point and is resident.
Optionally, judge that terminal receives the falling target of network-feedback within a preset time in first judging unit
Frequency point, but terminal fails in the case where falling back under the falling target frequency point and being resident, then:
Second judgment unit, judges whether terminal is stored with one or more and prestores frequency point；
CSFB falls unit after rise, judges that terminal storage has the case where one or more prestores frequency point in the second judgment unit
Under, terminal trial falls back to some and prestores under frequency point and be resident；
Network selection unit, judging that terminal is not stored in the second judgment unit has the case where one or more prestores frequency point
Under, terminal trial is resident under 2G or 3G network by way of network selection；
Service Processing Unit, for terminal after being successfully resident under 2G or 3G network, processing circuit exchanges business.
Optionally, terminal storage have it is multiple prestore frequency point, the multiple frequency point that prestores belongs to multiple networks.
Optionally, the terminal trial, which falls back to some and prestores under frequency point and be resident, is specifically: terminal trial is fallen back to
Some prestores under frequency point and is resident, and this prestores the LTE network that network belonging to frequency point is resident with terminal and belongs to identical fortune
Seek quotient.
Optionally, the CSFB falls unit after rise, falls back to some if being also used to terminal and failing and prestores frequency point simultaneously
Resident, then terminal trial falls back to another and prestores under frequency point and be resident.
Optionally, multiple frequency points that prestore belong to identical network if it exists, then will belong to the multiple of identical network and prestore frequency
Point is ranked up according to frequency point signal strength, successively attempts to be resident according to frequency point signal strength during falling.
Optionally, the multiple frequency point that prestores belongs to one or more of GSM or TD-SCDMA or WCDMA network.
Optionally, the frequency point that prestores stores for CSFB or stores or be directed to non-for other purposes
Specific purpose and store.
Optionally, the network selection unit is prestored under frequency point and is resident if being also used to terminal and failing to fall back to, terminal
Trial is resident under 2G or 3G network by way of network selection.
Optionally, the circuit-switched service is voice telephone service and/or supplementary service.
In order to solve the above-mentioned technical problem, the embodiment of the present invention also provides a kind of user terminal, and the terminal can be preparatory
Storage prestores frequency point, and the frequency point that prestores belongs to 2G or 3G network, the terminal support under LTE system it is conventional, depend on net
The CSFB technology of network instruction, further includes the processing unit of circuit-switched service under above-mentioned LTE system.
Optionally, the user terminal is smart phone.
Compared with prior art, technical solution of the present invention has the advantages that
For supporting the terminal of CSFB technology under LTE system, the case where network does not respond the CSFB request of terminal sending
Under, judge whether terminal is stored with one or more and prestores frequency point, if terminal storage has one or more to prestore frequency point, terminal
Trial falls back to some and prestores under frequency point and be resident, and reduces terminal and is forced to use the mode of network selection and is resident 2G or 3G network
Under situation, so as to increasing terminal in the scenario above from LTE network to 2G or the switch speed of 3G network.
Further, terminal trial falls back to some and prestores under frequency point and be resident, and this prestores network belonging to frequency point
The LTE network being resident with terminal belongs to identical operator, so that its service can not be enjoyed because of operator's difference by eliminating
Frequency point has further speeded up terminal from LTE network to 2G or the switch speed of 3G network.
Further, multiple frequency points that prestore belong to identical network, and the LTE net that belonging network and terminal are resident if it exists
Network belongs to identical operator, in the case, by belong to identical network it is multiple prestore frequency point according to frequency point signal strength into
Row sequence is successively attempted to be resident according to frequency point signal strength during falling.
Further, described to prestore frequency point either being directed to CSFB and storing, be also possible to for other purposes and
Storage, or stored for nonspecific purpose, to take full advantage of resource existing in terminal, enriches and prestore
The source of frequency point.
Detailed description of the invention
Fig. 1 is the processing method flow chart of circuit-switched service under LTE system in the embodiment of the present invention；
Fig. 2 is the processing unit structural block diagram of circuit-switched service under LTE system in the embodiment of the present invention.
Specific embodiment
According to the analysis of background technology part it is found that in the prior art, for supporting the end of CSFB technology under LTE system
End, in the case where network does not respond the CSFB request of terminal sending, terminal can attempt to be resident by way of network selection 2G or
3G network.
It is understood that 2G is resident by way of network selection or 3G network needs to spend the more time, it is this to do
Method is the equal of the inter-network switching process for not using CSFB technology, depending on the difference of network condition, it will usually spend 5~10 seconds very
To the more time.It is so prolonged to wait the user experience that seriously affect calling party, in practical applications, calling part user
When waiting 5~10 seconds still access failures, it could even be possible to abandoned call.
The scene of the CSFB request of terminal sending is not responded for above-mentioned network, inventor proposes one kind not after studying
The CSFB process that indicated dependent on network, can be independently carried out by terminal, to still be able to realize LTE net in the above scenario
Network is switched fast to 2G or 3G network.
The application provides a kind of processing method of circuit-switched service under LTE system, by it is above-mentioned independent of network instruction,
The CSFB process that can be independently carried out by terminal, applied to terminal to the processing of circuit-switched service under LTE system.
To more fully understand those skilled in the art and realizing the present invention, referring to the drawings, pass through specific embodiment
It is described in detail.
Embodiment one
As described below, the embodiment of the present invention provides a kind of processing method of circuit-switched service under LTE system.
The processing method flow chart of circuit-switched service under LTE system shown in referring to Fig.1, below by way of specific steps into
Row is described in detail:
Firstly, the realization of the processing method of the circuit-switched service in the present embodiment, has certain want for terminal itself
It asks.
Specifically, terminal itself needs support CSFB technology conventional, dependent on network instruction under LTE system.Meanwhile
Terminal, which can be stored in advance, prestores frequency point, and the frequency point that prestores belongs to 2G or 3G network.
S101, terminal reside under LTE network, issue CSFB request to network.
Current LTE network is full PS network, therefore, is only capable of supporting PS business and can not supporting CS business.
For supporting the terminal of routine CSFB technology, when terminal resides under LTE network, when needing to carry out CS business,
CSFB request is issued to network.Wherein, CS business can be voice telephone service either supplementary service.Terminal needs to carry out CS
The situation of business can be that terminal initiates voice call caller or voice responsive is telephone called etc..
As previously mentioned, terminal waits network-feedback to take after issuing CSFB request to network according to conventional CSFB process
With the falling instruction message for falling target frequency point after rise, is fallen back to according to the falling target frequency point that network indicates and carried out under 2G or 3G network
CS business.
That is, conventional CSFB process will be indicated dependent on network.When network is abnormal because of various reasons
When, it cannot respond to the CSFB request of terminal sending, in the case, falling target frequency point of the terminal due to lacking network-feedback,
It will be unable to be done directly CSFB process.
The present embodiment proposes effective solution for the situation for the CSFB request that above-mentioned network cannot respond to terminal sending
Scheme.
S102, judges whether terminal receives the falling target frequency point of network-feedback within a preset time.
Wherein, the falling target frequency point is to request to issue to terminal for the CSFB from network, the falling mesh
Mark frequency point can instruction terminal fall back under the falling target frequency point, the falling target frequency point belongs to 2G or 3G network.
In specific implementation, the target frequency point that falls after rise can usually be embodied as falling the adjacent area frequency point of target frequency point after rise
Information.
Specifically, terminal waits network-feedback to fall target after rise within a preset time after issuing CSFB request to network
Frequency point.Wherein, the preset time can terminal factory before preset, it is of course also possible to provide corresponding interface for
Family is set or is adjusted to the value of the preset time after terminal factory.
S103, if terminal receives the falling target frequency point of network-feedback within a preset time, terminal trial is fallen back to
Under the falling target frequency point and it is resident.
If terminal receives the falling target frequency point of network-feedback within a preset time, the end of conventional CSFB technology is supported
End can attempt to fall back under the falling target frequency point and be resident according to the falling target frequency point received.
But as background technology part is analyzed, when network is abnormal because of various reasons, terminal hair cannot respond to
CSFB request out, in the case, for existing CSFB technology, falling target of the terminal due to lacking network-feedback
Frequency point will be unable to be done directly CSFB process, be forced to be resident 2G or 3G network by the way of network selection, to greatly extend
Switching time of the LTE network to 2G or 3G network.
In the present embodiment, if terminal does not receive the falling target frequency point of network-feedback within a preset time, after carrying out
Continuous step S104.
In another embodiment, if terminal receives the adjacent area of the falling target frequency point of network-feedback within a preset time
Frequency point information, but fail and fall back under the falling target frequency point and be resident, then carry out subsequent step S104.
Whether S104 judges terminal if terminal does not receive the falling target frequency point of network-feedback within a preset time
It is stored with one or more and prestores frequency point.
Wherein, the frequency point that prestores is pre-stored.
For this purpose, terminal needs to have following ability: terminal can be stored in advance and prestore frequency point, wherein described to prestore frequency point
Belong to 2G or 3G network.
It is described to prestore frequency point either being directed to CSFB and storing, it is also possible to store for other purposes, or
Person stores for nonspecific purpose.
That is, terminal may for other purposes or nonspecific purpose be stored in advance it is described prestore frequency point, for example,
Storing the original intention that these prestore frequency point can be to accelerate network selection speed etc..In the present embodiment, it can use these and be originally used for
Accelerate network selection speed and store prestore frequency point, to execute subsequent step, to take full advantage of money existing in terminal
Source enriches the source for prestoring frequency point.
S105, if terminal storage has one or more to prestore frequency point, terminal trial is fallen back to some and is prestored under frequency point
And it is resident.
That is, if terminal storage has one or more to prestore frequency point, terminal prestores frequency point as returning using some
It falls target frequency point and carries out falling trial, that is, attempt to fall back under the falling target frequency point and be resident.
It is understood that when terminal storage have it is multiple prestore frequency point when, it is the multiple prestore frequency point be likely to belong to it is more
A network.Specifically, may frequency point under existing 2G network, also have frequency point under 3G network；It may existing TD-SCDMA network
Under frequency point, also have the frequency point under WCDMA network.
In a specific embodiment, the terminal trial, which falls back to some and prestores under frequency point and be resident, is specifically:
Terminal trial falls back to some and prestores under frequency point and be resident, and the LTE net that this prestores network belonging to frequency point and terminal is resident
Network belongs to identical (communication) operator.
For example, it is assumed that the LTE network that terminal is resident belongs to China Mobile, then this, which prestores frequency point, can be GSM or TD-
Frequency point under SCDMA network belongs to identical operator.
Similarly, if the LTE network that terminal is resident belongs to China Unicom, then this, which prestores frequency point, can be GSM or WCDMA net
Frequency point under network belongs to identical operator.
By above to the description of technical solution it can be seen that terminal trial is fallen back to some and is prestored in the present embodiment
It under frequency point and is resident, and this prestores the LTE network that network belonging to frequency point is resident with terminal and belongs to identical operator, to arrange
Frequency point in addition to that can not enjoy its service because of operator's difference, has further speeded up terminal from LTE network to 2G or 3G network
Switch speed.
Terminal storage have it is multiple prestore that frequency point is the multiple to be prestored in the case that frequency point belongs to multiple networks, if falling after rise
Failure is attempted, i.e., terminal, which fails, falls back to some and prestore frequency point and be resident, then terminal can prestore frequency point with another
It as target frequency point is fallen after rise, re-starts falling and attempts, is i.e. terminal trial falls back to another and prestores under frequency point and be resident.
Multiple frequency points that prestore belong to identical network if it exists, and the LTE network that belonging network is resident with terminal belongs to phase
With operator, in this case, it is possible to multiple prestore frequency point by belong to identical network and arranged according to frequency point signal strength
Sequence is successively attempted to be resident according to frequency point signal strength during falling, and 1 falling trial is carried out under every kind of network.
For example, it is assumed that the LTE network that terminal is resident belongs to China Mobile, terminal is previously stored with 15 and prestores frequency
Point, wherein 5 belong to GSM network, 4 belong to TD-SCDMA network, 6 belong to WCDMA network, then belong to GSM network for 5
The frequency point that prestores be ranked up according to frequency point signal strength, successively attempt during falling according to frequency point signal strength it is resident,
Hereafter, then by the frequency point that prestores that 4 belong to TD-SCDMA network it is ranked up according to frequency point signal strength, is pressed during falling
It successively attempts to be resident according to frequency point signal strength, since China Mobile does not run WCDMA network, 6 belong to WCDMA net
The frequency point that prestores of network is not made to fall trial after rise.Frequency point is prestored for above-mentioned 15,2 fallings is carried out in total and attempts (under every kind of network
1 falling trial is carried out, is belonged in the frequency point of GSM network from 5 according to frequency point signal strength up to one frequency point of low selection
Falling trial is carried out, is belonged in the frequency point of TD-SCDMA network from 4 according to frequency point signal strength up to one frequency of low selection
Point carries out falling trial).
By above to the description of technical solution it can be seen that multiple frequency points that prestore belong to phase if it exists in the present embodiment
Same network, and the LTE network that belonging network and terminal are resident belongs to identical operator, in the case, will belong to identical
Multiple frequency points that prestore of network are ranked up according to frequency point signal strength, are successively tasted during falling according to frequency point signal strength
Examination is resident.
Conventional CSFB technology is usually only applicable to the scene of the circuit domain covering Chong Die with LTE network of 2G or 3G network.
There are above-mentioned overlapping, operator would generally mix the frequency point of 2G or 3G network for the frequency point of LTE network, so as to
Under the frequency point for falling back to 2G or 3G network with the CSFB request instruction terminal issued in response to terminal.
It is understood that terminal trial is fallen back to corresponding to the adjacent area frequency point information of first kind frequency point in step S105
Under frequency point and resident step, it can be not limited to the above, i.e., both can be adapted for the circuit domain and LTE network of 2G or 3G network
It is overlapped the scene of covering, is readily applicable to that the scene of above-mentioned overlapping covering is not present.
S106, if terminal is not stored that one or more prestores frequency point or terminal fails to fall back to and prestore under frequency point
And be resident, then terminal trial is resident under 2G or 3G network by way of network selection.
It is understood that 2G is resident by way of network selection or 3G network needs to spend the more time, it is this to do
Method is the equal of the inter-network switching process for not using CSFB technology, depending on the difference of network condition, it will usually spend 5~10 seconds very
To the more time.
The prior art is tasted in the case where the falling target frequency point that terminal does not receive network-feedback within a preset time
The mode for pinging network selection is resident under 2G or 3G network.
And the present embodiment, in step S104, terminal does not receive the falling target frequency point of network-feedback within a preset time
In the case of, it first passes through step S105 trial and falls back to some and prestore under frequency point and be resident, have one or more terminal is not stored
A to prestore frequency point or terminal fails in the case where falling back to and prestoring under frequency point and is resident, just trial is by way of network selection
It is resident under 2G or 3G network.
Therefore, the present embodiment does not respond terminal sending in network for the terminal of CSFB technology under support LTE system
In the case that CSFB is requested, terminal can be reduced it is forced to use the mode of network selection and be resident situation under 2G or 3G network, thus
Can in the scenario above increasing terminal from LTE network to 2G or the switch speed of 3G network.
S107, for terminal after being successfully resident under 2G or 3G network, processing circuit exchanges business.
It is understood that if terminal still can not be successfully resident under 2G or 3G network by the way of network selection, nothing
Method handles CS business.It, can not also be by right under current technology level caused by above situation is usually the failure by network
The improvement of terminal hardware or software solves.
Terminal can be resident again under the frequency point of LTE network after completing to the processing of circuit-switched service.
Embodiment two
As described below, the embodiment of the present invention provides a kind of processing unit of circuit-switched service under LTE system.
Referring to the processing unit structural block diagram of circuit-switched service under LTE system shown in Fig. 2:
The processing unit of circuit-switched service includes: CSFB request unit 201, the first judging unit under the LTE system
202, second judgment unit 203, CSFB fall unit 204, network selection unit 205 and Service Processing Unit 206 after rise；Wherein each unit
Major function is as follows:
CSFB request unit 201, resides under LTE network for terminal, issues CSFB request to network；
First judging unit 202, for judging after the CSFB request unit 201 issues CSFB request to network
Whether terminal receives the falling target frequency point of network-feedback within a preset time, wherein the falling target frequency point is by net
Network for the CSFB request to terminal issue, the falling target frequency point can instruction terminal fall back to the falling target
Under frequency point, the falling target frequency point belongs to 2G or 3G network；
Second judgment unit 203, for judging that terminal does not receive within a preset time in first judging unit 202
In the case where the falling target frequency point of network-feedback, judge whether terminal is stored with one or more and prestores frequency point, wherein described
It is pre-stored for prestoring frequency point；
CSFB falls unit 204 after rise, for judging that terminal storage has one or more to prestore in the second judgment unit 203
In the case where frequency point, terminal trial falls back to some and prestores under frequency point and be resident；
Network selection unit 205 has one or more to prestore frequency for judging that terminal is not stored in the second judgment unit 203
In the case where point, terminal trial is resident under 2G or 3G network by way of network selection；
Service Processing Unit 206, for terminal after being successfully resident under 2G or 3G network, processing circuit exchanges industry
Business；
Wherein, terminal, which can be stored in advance, prestores frequency point, and the frequency point that prestores belongs to 2G or 3G network.
By above to the description of technical solution it can be seen that in the present embodiment, for supporting CSFB technology under LTE system
Terminal it is one or more pre- to judge whether terminal is stored in the case where network does not respond the CSFB request of terminal sending
Frequency point is deposited, if terminal storage has one or more to prestore frequency point, terminal trial falls back to some and prestores under frequency point and be resident,
Reduce terminal and be forced to use the mode of network selection and be resident situation under 2G or 3G network, so as to accelerate in the scenario above
Terminal is from LTE network to 2G or the switch speed of 3G network.
In specific implementation, the CSFB falls unit 204 after rise, can be also used for judging in first judging unit 202
In the case that terminal receives the falling target frequency point of network-feedback within a preset time, the falling mesh is fallen back in terminal trial
Under mark frequency point and it is resident.
In specific implementation, judge that terminal receives network-feedback within a preset time in first judging unit 202
Falling target frequency point, but terminal fails in the case where falling back under the falling target frequency point and being resident, then:
Second judgment unit 203, judges whether terminal is stored with one or more and prestores frequency point；
CSFB falls unit 204 after rise, judges that terminal storage has one or more to prestore frequency point in the second judgment unit 203
In the case where, terminal trial falls back to some and prestores under frequency point and be resident；
Network selection unit 205, judging that terminal is not stored in the second judgment unit 203 has one or more to prestore frequency point
In the case of, terminal trial is resident under 2G or 3G network by way of network selection；
Service Processing Unit 206, for terminal after being successfully resident under 2G or 3G network, processing circuit exchanges business.
In specific implementation, terminal can store it is multiple prestore frequency point, it is the multiple prestore frequency point may belong to it is multiple
Network.
In specific implementation, terminal trial falls back to some and prestores under frequency point and resident specifically may is that terminal
Trial falls back to some and prestores under frequency point and be resident, and the LTE network category that this prestores network belonging to frequency point and terminal is resident
In identical operator.
By above to the description of technical solution it can be seen that terminal trial is fallen back to some and is prestored in the present embodiment
It under frequency point and is resident, and this prestores the LTE network that network belonging to frequency point is resident with terminal and belongs to identical operator, to arrange
Frequency point in addition to that can not enjoy its service because of operator's difference, has further speeded up terminal from LTE network to 2G or 3G network
Switch speed.
In specific implementation, the CSFB falls unit 204 after rise, falls back to some if can be also used for terminal and fail
Prestore frequency point and be resident, then terminal trial falls back to another and prestores under frequency point and be resident.
In specific implementation, multiple frequency points that prestore belong to identical network if it exists, then can will belong to identical network
Multiple frequency points that prestore are ranked up according to frequency point signal strength, successively attempt to stay according to frequency point signal strength during falling
It stays.
By above to the description of technical solution it can be seen that multiple frequency points that prestore belong to phase if it exists in the present embodiment
Same network, and the LTE network that belonging network and terminal are resident belongs to identical operator, in the case, will belong to identical
Multiple frequency points that prestore of network are ranked up according to frequency point signal strength, are successively tasted during falling according to frequency point signal strength
Examination is resident.
In specific implementation, the multiple one that prestores frequency point and may belong in GSM or TD-SCDMA or WCDMA network
Or it is multiple.
In specific implementation, the frequency point that prestores can be for CSFB and store or be directed to other purposes and store
Or stored for nonspecific purpose.
It is described to prestore frequency point either being directed to by above to the description of technical solution it can be seen that in the present embodiment
CSFB and store, be also possible to store for other purposes, or be stored for nonspecific purpose, to fill
Divide and resource existing in terminal is utilized, enriches the source for prestoring frequency point.
In specific implementation, the network selection unit 205 prestores under frequency point if can be also used for terminal and fail to fall back to
And be resident, then terminal trial is resident under 2G or 3G network by way of network selection.
In specific implementation, the circuit-switched service can be voice telephone service and/or supplementary service.
Embodiment three
As described below, the embodiment of the present invention provides a kind of user terminal.
The user terminal, which can be stored in advance, prestores frequency point, and the frequency point that prestores belongs to 2G or 3G network, the terminal
Support CSFB technology conventional, dependent on network instruction under LTE system.
The difference is that, which further includes the LTE as provided in the embodiment of the present invention with the prior art
The processing unit of circuit-switched service under system.Thus the user terminal for support LTE system under CSFB technology terminal,
In the case that network does not respond the CSFB request of terminal sending, judge whether terminal is stored with one or more and prestores frequency point, if
Terminal storage has one or more to prestore frequency point, then terminal trial falls back to some and prestores under frequency point and be resident, and reduces end
The mode that end is forced to use network selection is resident situation under 2G or 3G network, so as to increasing terminal in the scenario above from
LTE network is to 2G or the switch speed of 3G network.
In specific implementation, the user terminal can be smart phone.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium may include: ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (20)
1. the processing method of circuit-switched service under a kind of LTE system, which is characterized in that terminal, which can be stored in advance, prestores frequency
Point, the frequency point that prestores belong to 2G or 3G network, the treating method comprises:
Terminal resides under LTE network, issues CSFB request to network；
Judge whether terminal receives the falling target frequency point of network-feedback within a preset time, wherein the falling target frequency
Point is to request to issue to terminal for the CSFB from network, and the falling target frequency point can be described in instruction terminal falls back to
It falls after rise under target frequency point, the falling target frequency point belongs to 2G or 3G network；If it is anti-that terminal receives network within a preset time
The falling target frequency point of feedback, then terminal trial are fallen back under the falling target frequency point and are resident；If terminal is within a preset time
The falling target frequency point of network-feedback is received, but is failed and is fallen back under the falling target frequency point and be resident or be
If terminal does not receive the falling target frequency point of network-feedback within a preset time, judge whether terminal is stored with one or more
It is a to prestore frequency point, wherein the frequency point that prestores is pre-stored；
If terminal storage has one or more to prestore frequency point, terminal trial falls back to some and prestores under frequency point and be resident；
There is one or more to prestore frequency point if terminal is not stored, 2G or 3G network are resident in terminal trial by way of network selection
Under；
For terminal after being successfully resident under 2G or 3G network, processing circuit exchanges business.
2. the processing method of circuit-switched service under LTE system as described in claim 1, which is characterized in that terminal storage has
Multiple to prestore frequency point, the multiple frequency point that prestores belongs to multiple networks.
3. the processing method of circuit-switched service under LTE system as claimed in claim 2, which is characterized in that the terminal is tasted
Examination falls back to some and prestores under frequency point and be resident: terminal trial falls back to some and prestores under frequency point and be resident, and
This prestores the LTE network that network belonging to frequency point is resident with terminal and belongs to identical operator.
4. the processing method of circuit-switched service under LTE system as claimed in claim 2, which is characterized in that if terminal fails
Successfully fall back to some prestore frequency point and be resident, then terminal trial falls back to another and prestores under frequency point and be resident.
5. the processing method of circuit-switched service under LTE system as claimed in claim 2, which is characterized in that multiple if it exists
It prestores frequency point and belongs to identical network, then multiple prestore frequency point by belong to identical network and arranged according to frequency point signal strength
Sequence is successively attempted to be resident according to frequency point signal strength during falling.
6. the processing method of circuit-switched service under LTE system as claimed in claim 2, which is characterized in that the multiple pre-
It deposits frequency point and belongs to one or more of GSM or TD-SCDMA or WCDMA network.
7. the processing method of circuit-switched service under LTE system as described in claim 1, which is characterized in that described to prestore frequency
Point is to store for CSFB or store for other purposes or store for nonspecific purpose.
8. the processing method of circuit-switched service under LTE system as described in claim 1, which is characterized in that if terminal fails
It successfully falls back to and prestores under frequency point and be resident, then terminal trial is resident under 2G or 3G network by way of network selection.
9. the processing method of circuit-switched service under LTE system as described in claim 1, which is characterized in that the circuit is handed over
Changing business is voice telephone service and/or supplementary service.
10. the processing unit of circuit-switched service under a kind of LTE system, which is characterized in that terminal, which can be stored in advance, prestores frequency
Point, the frequency point that prestores belong to 2G or 3G network, and the processing unit includes: CSFB request unit, the first judging unit, second
Judging unit, CSFB fall unit, network selection unit and Service Processing Unit after rise；Wherein:
CSFB request unit, resides under LTE network for terminal, issues CSFB request to network；
First judging unit, for the CSFB request unit to network issue CSFB request after, judge terminal whether
The falling target frequency point of network-feedback is received in preset time, wherein the falling target frequency point is by network for described
CSFB request to terminal issue, the falling target frequency point can instruction terminal fall back under the falling target frequency point, institute
It states falling target frequency point and belongs to 2G or 3G network；
Second judgment unit, for judging that terminal does not receive network-feedback within a preset time in first judging unit
In the case where falling target frequency point after rise, judge whether terminal is stored with one or more and prestores frequency point, wherein the frequency point that prestores is
It is pre-stored；
CSFB falls unit after rise, for judging that terminal storage has the case where one or more prestores frequency point in the second judgment unit
Under, terminal trial falls back to some and prestores under frequency point and be resident, and is also used to judge terminal pre- in first judging unit
If in the case where the falling target frequency point for receiving network-feedback in the time, terminal trial is fallen back under the falling target frequency point
And it is resident；
Network selection unit has the case where one or more prestores frequency point for judging that terminal is not stored in the second judgment unit
Under, terminal trial is resident under 2G or 3G network by way of network selection；
Service Processing Unit, for terminal after being successfully resident under 2G or 3G network, processing circuit exchanges business；
Judge that terminal receives the falling target frequency point of network-feedback, but terminal within a preset time in first judging unit
It fails in the case where falling back under the falling target frequency point and being resident, then: second judgment unit judges whether terminal deposits
It contains one or more and prestores frequency point；
CSFB falls unit after rise, in the case where the second judgment unit judges that terminal storage has one or more to prestore frequency point,
Terminal trial falls back to some and prestores under frequency point and be resident；
Network selection unit, in the case where the second judgment unit, which judges that terminal is not stored, has one or more to prestore frequency point, eventually
It attempts to be resident by way of network selection under 2G or 3G network in end；
Service Processing Unit, for terminal after being successfully resident under 2G or 3G network, processing circuit exchanges business.
11. the processing unit of circuit-switched service under LTE system as claimed in claim 10, which is characterized in that terminal storage
Have it is multiple prestore frequency point, the multiple frequency point that prestores belongs to multiple networks.
12. the processing unit of circuit-switched service under LTE system as claimed in claim 11, which is characterized in that the terminal
Trial falls back to some and prestores under frequency point and be resident: terminal trial falls back to some and prestores under frequency point and be resident,
And this prestores the LTE network that network belonging to frequency point is resident with terminal and belongs to identical operator.
13. the processing unit of circuit-switched service under LTE system as claimed in claim 11, which is characterized in that the CSFB
Fall unit after rise, if be also used to terminal fail fall back to some prestore frequency point and be resident, terminal trial is fallen back to another
One prestores under frequency point and is resident.
14. the processing unit of circuit-switched service under LTE system as claimed in claim 11, which is characterized in that more if it exists
A frequency point that prestores belongs to identical network, then multiple prestore frequency point by belong to identical network and arrange according to frequency point signal strength
Sequence is successively attempted to be resident according to frequency point signal strength during falling.
15. the processing unit of circuit-switched service under LTE system as claimed in claim 11, which is characterized in that the multiple
It prestores frequency point and belongs to one or more of GSM or TD-SCDMA or WCDMA network.
16. the processing unit of circuit-switched service under LTE system as claimed in claim 10, which is characterized in that described to prestore
Frequency point stores for CSFB or stores for other purposes or store for nonspecific purpose.
17. the processing unit of circuit-switched service under LTE system as claimed in claim 10, which is characterized in that the network selection
Unit is prestored under frequency point and is resident if being also used to terminal and failing to fall back to, and terminal is attempted to be resident by way of network selection
To under 2G or 3G network.
18. the processing unit of circuit-switched service under LTE system as claimed in claim 10, which is characterized in that the circuit
Exchange business is voice telephone service and/or supplementary service.
19. a kind of user terminal, the terminal supports CSFB technology conventional, dependent on network instruction under LTE system, special
Sign is, further includes the processing unit of circuit-switched service under the LTE system as described in any one of claim 10 to 18.
20. user terminal as claimed in claim 19, which is characterized in that the user terminal is smart phone.
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| CN201510084879.7A CN105992294B (en) | 2015-02-16 | 2015-02-16 | The processing method and processing device of circuit-switched service under user terminal and its LTE system |
| CN201910878594.9A CN110505667B (en) | 2015-02-16 | 2015-02-16 | User terminal and method and device for processing circuit switching service in LTE system of user terminal |
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| CN201510084879.7A CN105992294B (en) | 2015-02-16 | 2015-02-16 | The processing method and processing device of circuit-switched service under user terminal and its LTE system |
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| CN108668298B (en) * | 2017-03-30 | 2021-05-04 | 中国移动通信集团设计院有限公司 | CSFB fallback frequency point optimization method and server |
| WO2019000309A1 (en) * | 2017-06-29 | 2019-01-03 | 华为技术有限公司 | Method for circuit switched fallback, and terminal |
| WO2019061433A1 (en) * | 2017-09-30 | 2019-04-04 | 深圳市云中飞网络科技有限公司 | Csfb result detection method and device, and storage medium |
| CN108124514B (en) * | 2017-09-30 | 2021-01-22 | 深圳市欢太科技有限公司 | CSFB (Circuit switched Fall Back) fall result detection method and device and computer storage medium |
| CN110300437B (en) * | 2019-07-25 | 2021-06-22 | 中国联合网络通信集团有限公司 | Method, terminal and system for shortening CSFB (Circuit switched fallback) cell fall-back time |
| CN113747381B (en) * | 2021-09-07 | 2023-02-17 | 维沃移动通信有限公司 | Method and device for fallback of evolved packet system and electronic equipment |
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| CN110505667B (en) | 2022-01-18 |
| CN110505667A (en) | 2019-11-26 |
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