CN105228221A - A kind of method and apparatus of fast return Long Term Evolution LTE network - Google Patents
A kind of method and apparatus of fast return Long Term Evolution LTE network Download PDFInfo
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- CN105228221A CN105228221A CN201410273475.8A CN201410273475A CN105228221A CN 105228221 A CN105228221 A CN 105228221A CN 201410273475 A CN201410273475 A CN 201410273475A CN 105228221 A CN105228221 A CN 105228221A
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Abstract
The invention discloses a kind of method and apparatus of fast return LTE network, cannot the problem of fast return LTE network after CS voice conversation terminates in order to solve the LTE terminal that exists in prior art.The method comprises: after circuit switching (CS) voice conversation terminates, and judges the type of described CS voice conversation; When judging that the type of described CS voice conversation is CSFB? during CS voice conversation type, in the very first time length pre-set, the LTE frequency point prestored is searched for; When judging that the type of described CS voice conversation is SRVCC? during CS voice conversation type, in the second time span pre-set, the LTE frequency point prestored is searched for; When any one LTE frequency point in the LTE frequency point prestored described in searching, and when the LTE frequency point searched is available frequency, the LTE frequency point searched described in residing in, to return LTE network.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of method and apparatus of fast return Long Term Evolution (LongTermEvolution, LTE) network.
Background technology
According to 3rd Generation Partnership Project (3rdGenerationPartnershipProject, 3GPP) standard, LTE network only has packet switching (PacketSwitch, PS) territory business, LTE terminal needs to support circuit domain dropping (CircuitSwitchedFallback, CSFB) just can answer or call: LTE terminal have voice caller or called time, after sending expansion service request (ExtentedServiceRequest) message to LTE network, issue redirect message by LTE network and LTE terminal is redirected to second generation communication system/third generation communication system (TheSecondGeneration/TheThirdGeneration, 2G/3G) circuit switching (the CircuitSwitch of network, CS) voice conversation (i.e. CS voice conversation) is carried out in territory.Wherein, initiate in the overlay area of LTE network, the voice conversation then undertaken by CSFB can be called as CSFBCS voice conversation.After CSFBCS voice conversation terminates, the fast return FastReturn scheme that 2G/3G network utilisation 3GPP standard specifies, issue channel release (ChannelRelease) message, carry the LTE frequency point that LTE terminal can return in this ChannelRelease message, guide LTE terminal to return LTE network with the fastest speed.But this programme needs to carry out larger transformation to existing 2G/3G network, especially LTE network is in voice-based LTE (VoiceoverLTE at present, VoLTE) stage of the network LTE network of VoLTE (also can be called support) evolution, so in order to support that CSFB carries out large-scale transformation to 2G/3G network and carries out excess investment and do not have too many benefit.
In addition, when LTE terminal is in VoLTE network, directly can carry out VoLTE voice conversation, without the need to falling back to the CS territory of 2G/3G network again.When LTE terminal carries out VoLTE voice conversation, if LTE terminal moves to weak covering or the edge cover area of VoLTE network, VoLTE network can initiate singly to treat wireless voice call continuity (SingleRadioVoiceCallContinuity, SRVCC) switch, VoLTE voice conversation is made to be switched to the CS territory of 2G/3G network, to ensure that voice conversation is continuous.Wherein, initiate in the overlay area of LTE network, then switch by SRVCC the voice conversation carried out and can be called as SRVCCCS voice conversation.After SRVCCCS voice conversation terminates, can only return LTE network according to current 3GPP standard by the FastReturn scheme of foregoing description, if network side does not dispose FastReturn scheme, so LTE terminal just cannot fast return LTE network.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus of fast return LTE network, cannot the problem of fast return LTE network after CS voice conversation terminates in order to solve the LTE terminal that exists in prior art.
The embodiment of the present invention is by the following technical solutions:
Embodiments provide a kind of method of fast return LTE network, comprising:
After circuit switching (CS) voice conversation terminates, judge the type of described CS voice conversation;
When judging that the type of described CS voice conversation is circuit domain dropping CSFBCS voice conversation type, in the very first time length pre-set, the LTE frequency point prestored is searched for; The described LTE frequency point prestored is the LTE frequency point of the resident mistake of LTE terminal;
When judging that the type of described CS voice conversation is single wireless voice call continuity SRVCCCS voice conversation type, in the second time span pre-set, the LTE frequency point prestored is searched for;
When any one LTE frequency point in the LTE frequency point prestored described in searching, and when the LTE frequency point searched is available frequency, the LTE frequency point searched described in residing in, to return LTE network.
Optionally, before searching for the LTE frequency point prestored, described method also comprises:
When judging that the type of described CS voice conversation is 2G/3GCS voice conversation type, according to the order of the residence time in the LTE frequency point prestored near to far away, the LTE frequency point choosing predetermined number from the described LTE frequency point prestored is searched for.
Optionally, when judging that the type of described CS voice conversation is CSFBCS voice conversation type or 2G/3GCS voice conversation type; Then
Describedly reside in this any one LTE frequency point, after returning LTE network, described method also comprises:
Judge whether described LTE network supports VoLTE;
When judging that described LTE network supports VoLTE, send IP Multimedia System Packet Data Network IMSPDN to described LTE network and set up request, after described IMSPDN sets up, IMS registration request is sent to described LTE network, and after IMS registration completes, indicate described LTE terminal next time voice conversation time, adopt VoLTE carry out voice conversation;
When judging that described LTE network does not support VoLTE, indicate described LTE terminal next time voice conversation time, adopt CSFB carry out voice conversation.
Optionally, when judging that the type of described CS voice conversation is SRVCCCS voice conversation type; Then
Describedly reside in this any one LTE frequency point, after returning LTE network, described method also comprises:
Judge whether described LTE network supports VoLTE;
When judging that described LTE network supports VoLTE, IMS initial registration request or IMS refresh registration request is sent to described LTE network by the state of IMS registration timer, and after IMS registration completes, indicate described LTE terminal next time voice conversation time, adopt VoLTE carry out voice conversation;
When judging that described LTE network does not support VoLTE, sending IMS to described LTE network and removing registration request, and deleting the IMSPDN set up in advance, and indicate described LTE terminal next time voice conversation time, adopt CSFB to carry out voice conversation.
Optionally, described very first time length is greater than described second time span
Embodiments provide a kind of device of fast return LTE network, comprising:
Judging unit, after terminating, judges the type of described CS voice conversation for circuit switching (CS) voice conversation;
CSFB search unit, during for judging that when judging unit the type of described CS voice conversation is circuit domain dropping CSFBCS voice conversation type, searches for the LTE frequency point prestored in the very first time length pre-set; The described LTE frequency point prestored is the LTE frequency point of the resident mistake of LTE terminal;
SRVCC search unit, during for judging that when judging unit the type of described CS voice conversation is SRVCCCS voice conversation type, searches for the LTE frequency point prestored in the second time span pre-set;
Resident element, for any one LTE frequency point in the LTE frequency point that prestores described in searching when CSFB search unit or SRVCC search unit, and the LTE frequency point searched is when being available frequency, the LTE frequency point searched described in residing in, to return LTE network.
Optionally, described device also comprises:
2G/3G search unit, during for judging that when judging unit the type of described CS voice conversation is 2G/3GCS voice conversation type, according to the order of the residence time in the LTE frequency point prestored near to far away, the LTE frequency point choosing predetermined number from the described LTE frequency point prestored is searched for.
Optionally, when judging that the type of described CS voice conversation is CSFBCS voice conversation type or 2G/3GCS voice conversation type; Then
Described device also comprises:
One VoLTE judging unit, for judging whether the LTE network that described resident element returns supports VoLTE;
First processing unit, during for judging described LTE network support VoLTE when a VoLTE judging unit, send IP Multimedia System Packet Data Network IMSPDN to described LTE network and set up request, after described IMSPDN sets up, IMS registration request is sent to described LTE network, and after IMS registration completes, indicate described LTE terminal next time voice conversation time, adopt VoLTE carry out voice conversation; When a VoLTE judging unit judges that described LTE network does not support VoLTE, indicate described LTE terminal next time voice conversation time, adopt CSFB to carry out voice conversation.
Optionally, when judging that the type of described CS voice conversation is SRVCCCS voice conversation type; Then
Described device also comprises:
2nd VoLTE judging unit, for judging whether the LTE network that described resident element returns supports VoLTE;
Second processing unit, during for judging described LTE network support VoLTE when the 2nd VoLTE judging unit, IMS initial registration request or IMS refresh registration request is sent to described LTE network by the state of IMS registration timer, and after IMS registration completes, indicate described LTE terminal next time voice conversation time, adopt VoLTE carry out voice conversation; When the 2nd VoLTE judging unit judges that described LTE network does not support VoLTE, send IMS to described LTE network and remove registration request, and delete the IMSPDN that sets up in advance, and indicate described LTE terminal next time voice conversation time, adopt CSFB to carry out voice conversation.
Optionally, described very first time length is greater than described second time span.
The beneficial effect of the embodiment of the present invention is as follows:
In the embodiment of the present invention, after LTE terminal terminates CS voice conversation, for dissimilar CS voice conversation, arrange different time spans to search for the LTE frequency point prestored, when searching any one LTE frequency point in the LTE frequency point prestored, and the LTE frequency point searched is when being available frequency, then reside in the LTE frequency point searched, to return LTE network.This technical scheme, without the need to carrying out larger transformation to existing 2G/3G network, also can ensure that LTE terminal returns LTE network as early as possible after CS voice conversation terminates, and makes user fully enjoy LTE at a high speed and serves.
Accompanying drawing explanation
The realization flow figure of the method for a kind of fast return LTE network that Fig. 1 provides for the embodiment of the present invention;
At the end of the CSFBCS voice conversation that Fig. 2 provides for the embodiment of the present invention fast return LTE network method realize schematic diagram;
At the end of the SRVCCCS voice conversation that Fig. 3 provides for the embodiment of the present invention fast return LTE network method realize schematic diagram;
At the end of the 2G/3GCS voice conversation that Fig. 4 provides for the embodiment of the present invention fast return LTE network method realize schematic diagram;
The structural representation of the device of a kind of fast return LTE network that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Cannot the problem of fast return LTE network after CS voice conversation terminates in order to solve the LTE terminal that exists in prior art, the embodiment of the present application proposes a kind of scheme of fast return LTE network.In this technical scheme, after LTE terminal terminates CS voice conversation, for dissimilar CS voice conversation, arrange different time spans to search for the LTE frequency point prestored, when searching any one LTE frequency point in the LTE frequency point prestored, and the LTE frequency point searched is when being available frequency, then reside in the LTE frequency point searched, to return LTE network.This technical scheme, without the need to carrying out larger transformation to existing 2G/3G network, also can ensure that LTE terminal returns LTE network as early as possible after CS voice conversation terminates, and makes user fully enjoy LTE at a high speed and serves.
Below in conjunction with Figure of description, embodiments of the invention are described, should be appreciated that embodiment described herein is only for instruction and explanation of the present invention, is not limited to the present invention.And when not conflicting, the embodiment in the present invention and the feature of embodiment can be combined with each other.
Provide a kind of method of fast return LTE network in the embodiment of the present invention, as shown in Figure 1, be the principle flow chart of the method, can specifically comprise the steps:
Step 11, after CS voice conversation terminates, judges the type of described CS voice conversation;
Wherein, CS voice conversation for now, generally can be, but not limited to be divided into following type:
1, CSFBCS voice conversation: initiate, then by voice conversation that CSFB carries out in the overlay area of the LTE network not supporting VoLTE;
2, SRVCCCS voice conversation: initiate in the overlay area of the LTE network supporting VoLTE, then switched the voice conversation carried out by SRVCC.
Step 12, when the type judging the CS voice conversation terminated is CSFBCS voice conversation type, searches for the LTE frequency point prestored in the very first time length pre-set;
Wherein, the LTE frequency point prestored is the LTE frequency point of the resident mistake of LTE terminal, can be multiple, also can be one.
Step 13, when the CS voice conversation type judging to terminate is SRVCCCS voice conversation type, searches for the LTE frequency point prestored in the second time span pre-set;
Wherein, very first time length and the second time span can self-definedly be arranged.General, if the CS voice conversation terminated is CSFBCS voice conversation, then illustrate that LTE terminal is when carrying out voice conversation, the LTE network overlay area not supporting VoLTE should be positioned at, if the CS voice conversation terminated is SRVCCCS voice conversation, then illustrate that LTE terminal is when carrying out voice conversation, weak covering or the edge cover area of the LTE network supporting VoLTE should be positioned at, therefore, very first time length can be defined and be greater than the second time span, to reduce in the weak covering of LTE network or the search time of edge cover area, save system resource.
In addition, if when LTE terminal initiates voice conversation, be positioned at the overlay area (namely covering without LTE network) of 2G/3G network, then the voice conversation of initiating is 2G/3GCS voice conversation type;
Therefore, optionally, the embodiment of the present invention can also comprise the steps:
When the type judging the CS voice conversation terminated is 2G/3GCS voice conversation type, according to the order of the residence time in the LTE frequency point prestored near to far away, the LTE frequency point choosing predetermined number from the described LTE frequency point prestored is searched for.
Concrete, if the CS voice conversation terminated is 2G/3GCS voice conversation, then illustrate that LTE terminal is when carrying out voice conversation, the overlay area of 2G/3G network should be positioned at, and cover without LTE network, so there is no the necessary all LTE frequency point prestored search, in order to avoid waste system resource, can, from the LTE frequency point prestored, the LTE frequency point of several nearest resident mistake be selected to carry out searching for.
Step 14, when searching any one LTE frequency point in the LTE frequency point prestored, and when the LTE frequency point searched is available frequency, resides in the LTE frequency point searched, to return LTE network;
Technique scheme, without the need to carrying out larger transformation to existing 2G/3G network, also can ensure that LTE terminal returns LTE network as early as possible after CS voice conversation terminates, and makes user fully enjoy LTE at a high speed and serves.
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described in detail.
As shown in Figure 2, for fast return LTE network at the end of CSFBCS voice conversation method realize schematic diagram.
Step 21, LTE terminal, after hanging up CSFBCS voice conversation, attempts searching for the LTE frequency point bunch of resident mistake in timer T1, if when searching available frequency in timer T1, performs step 22, otherwise performs step 28;
Step 22, resides in the available frequency searched, to return LTE network;
By VoiceoverPSSession field, step 23, judges whether resident LTE network supports VoLTE, if judged result is yes, perform step 24, otherwise perform step 27;
Wherein, VoiceoverPSSession field is the field in the command transmitting in LTE network, by the content of this field, just can judge whether this LTE network supports VoLTE.
Step 24, LTE terminal sends IP Multimedia System (IPMultimediaSubsystem, IMS) Packet Data Network (PacketDataNetwork, PDN) and sets up request;
Step 25, after IMSPDN sets up, LTE terminal sends IMS registration request;
Step 26, after IMS registration completes, instruction LTE terminal next time voice conversation time, adopt VoLTE carry out voice conversation;
Step 27, instruction LTE terminal next time voice conversation time, continue adopt CSFB carry out voice conversation;
Step 28, LTE terminal resides in 2G/3G network, and when upper once voice conversation, continues to adopt 2G/3GCS voice conversation.
As shown in Figure 3, for fast return LTE network at the end of SRVCCCS voice conversation method realize schematic diagram.
Step 31, LTE terminal, after hanging up SRVCCCS voice conversation, attempts searching for the LTE frequency point bunch of resident mistake: if search available frequency in timer T2 in timer T2, performs step 32, otherwise performs step 39;
Step 32, resides in the available frequency searched, to return LTE network;
Step 33, the VoiceoverPSSession field passed through judges whether resident LTE network supports VoLTE, if judged result is yes, performs step 34, otherwise performs step 38;
Step 34, LTE terminal judges the state of IMS registration timer; If the state of judging is timeout mode, then perform step 35; Otherwise perform step 36;
Step 35, LTE terminal sends IMS initial registration request, and performs step 37;
Step 36, LTE terminal sends IMS refresh registration request;
Step 37, after IMS registration completes, instruction LTE terminal next time voice conversation time, adopt VoLTE carry out voice conversation;
Step 38, LTE terminal sends IMS and removes registration request, and deletes IMSPDN, and instruction LTE terminal next time voice conversation time, adopt CSFB to carry out voice conversation;
Step 39, LTE terminal resides in 2G/3G network, and when upper once voice conversation, continues to adopt 2G/3GCS voice conversation.
As shown in Figure 4, for fast return LTE network at the end of 2G/3GCS voice conversation method realize schematic diagram.
Step 41, LTE terminal, after hanging up 2G/3GCS call voice conversation end, attempts searching for the LTE frequency point of nearest resident mistake, if search available frequency, then performs step 42, otherwise performs step 48;
Step 42, resides in the available frequency searched, to return LTE network;
By VoiceoverPSSession field, step 43, judges whether resident LTE network supports VoLTE, if judged result is yes, perform step 44, otherwise perform step 47;
Step 44, LTE terminal sends IMSPDN and sets up request;
Step 45, after IMSPDN sets up, LTE terminal sends IMS registration request;
Step 46, after IMS registration completes, instruction LTE terminal next time voice conversation time, adopt VoLTE carry out voice conversation;
Step 47, instruction LTE terminal next time voice conversation time, continue adopt CSFB carry out voice conversation;
Step 48, LTE terminal resides in 2G/3G network, and when upper once voice conversation, continues to adopt 2G/3GCS voice conversation.
Based on said method, the embodiment of the present invention additionally provides a kind of device of fast return LTE network, and this device can be, but not limited to as LTE terminal, as shown in Figure 5, is the structural representation of this device, comprises following function unit:
Judging unit 51, after terminating, judges the type of described CS voice conversation for circuit switching (CS) voice conversation;
CSFB search unit 52, during for judging that the type of described CS voice conversation is circuit domain dropping CSFBCS voice conversation type when judging unit 51, searches for the LTE frequency point prestored in the very first time length pre-set; The described LTE frequency point prestored is the LTE frequency point of the resident mistake of LTE terminal;
SRVCC search unit 53, during for judging that the type of described CS voice conversation is SRVCCCS voice conversation type when judging unit 51, searches for the LTE frequency point prestored in the second time span pre-set;
Resident element 54, for any one LTE frequency point in the LTE frequency point that prestores described in searching when CSFB search unit or SRVCC search unit, and the LTE frequency point searched is when being available frequency, the LTE frequency point searched described in residing in, to return LTE network.
Optionally, described device also comprises:
2G/3G search unit 55, during for judging that the type of described CS voice conversation is 2G/3GCS voice conversation type when judging unit 51, according to the order of the residence time in the LTE frequency point prestored near to far away, the LTE frequency point choosing predetermined number from the described LTE frequency point prestored is searched for.
Optionally, when judging that the type of described CS voice conversation is CSFBCS voice conversation type or 2G/3GCS voice conversation type; Then
Described device also comprises:
One VoLTE judging unit 56, for judging whether the LTE network that described resident element 54 returns supports VoLTE;
First processing unit 57, during for judging described LTE network support VoLTE when a VoLTE judging unit 56, send IP Multimedia System Packet Data Network IMSPDN to described LTE network and set up request, after described IMSPDN sets up, IMS registration request is sent to described LTE network, and after IMS registration completes, indicate described LTE terminal next time voice conversation time, adopt VoLTE carry out voice conversation; When a VoLTE judging unit judges that described LTE network does not support VoLTE, indicate described LTE terminal next time voice conversation time, adopt CSFB to carry out voice conversation.
Optionally, when judging that the type of described CS voice conversation is SRVCCCS voice conversation type; Then
Described device also comprises:
2nd VoLTE judging unit 58, for judging whether the LTE network that described resident element 54 returns supports VoLTE;
Second processing unit 59, during for judging described LTE network support VoLTE when the 2nd VoLTE judging unit 58, IMS initial registration request or IMS refresh registration request is sent to described LTE network by the state of IMS registration timer, and after IMS registration completes, indicate described LTE terminal next time voice conversation time, adopt VoLTE carry out voice conversation; When the 2nd VoLTE judging unit judges that described LTE network does not support VoLTE, send IMS to described LTE network and remove registration request, and delete the IMSPDN that sets up in advance, and indicate described LTE terminal next time voice conversation time, adopt CSFB to carry out voice conversation.
Optionally, described very first time length is greater than described second time span.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a method for fast return Long Term Evolution LTE network, is characterized in that, comprising:
After circuit switching (CS) voice conversation terminates, judge the type of described CS voice conversation;
When judging that the type of described CS voice conversation is circuit domain dropping CSFBCS voice conversation type, in the very first time length pre-set, the LTE frequency point prestored is searched for; The described LTE frequency point prestored is the LTE frequency point of the resident mistake of LTE terminal;
When judging that the type of described CS voice conversation is single wireless voice call continuity SRVCCCS voice conversation type, in the second time span pre-set, the LTE frequency point prestored is searched for;
When any one LTE frequency point in the LTE frequency point prestored described in searching, and when the LTE frequency point searched is available frequency, the LTE frequency point searched described in residing in, to return LTE network.
2. the method for claim 1, is characterized in that, described method also comprises:
When judging that the type of described CS voice conversation is 2G/3GCS voice conversation type, according to the order of the residence time in the LTE frequency point prestored near to far away, the LTE frequency point choosing predetermined number from the described LTE frequency point prestored is searched for.
3. method as claimed in claim 2, is characterized in that, when judging that the type of described CS voice conversation is CSFBCS voice conversation type or 2G/3GCS voice conversation type; Then
Describedly reside in this any one LTE frequency point, after returning LTE network, described method also comprises:
Judge whether described LTE network supports VoLTE;
When judging that described LTE network supports VoLTE, send IP Multimedia System Packet Data Network IMSPDN to described LTE network and set up request, after described IMSPDN sets up, IMS registration request is sent to described LTE network, and after IMS registration completes, indicate described LTE terminal next time voice conversation time, adopt VoLTE carry out voice conversation;
When judging that described LTE network does not support VoLTE, indicate described LTE terminal next time voice conversation time, adopt CSFB carry out voice conversation.
4. the method for claim 1, is characterized in that, when judging that the type of described CS voice conversation is SRVCCCS voice conversation type; Then
Describedly reside in this any one LTE frequency point, after returning LTE network, described method also comprises:
Judge whether described LTE network supports VoLTE;
When judging that described LTE network supports VoLTE, IMS initial registration request or IMS refresh registration request is sent to described LTE network by the state of IMS registration timer, and after IMS registration completes, indicate described LTE terminal next time voice conversation time, adopt VoLTE carry out voice conversation;
When judging that described LTE network does not support VoLTE, sending IMS to described LTE network and removing registration request, and deleting the IMSPDN set up in advance, and indicate described LTE terminal next time voice conversation time, adopt CSFB to carry out voice conversation.
5. the method as described in as arbitrary in claim 1-4, it is characterized in that, described very first time length is greater than described second time span.
6. a device for fast return LTE network, is characterized in that, comprising:
Judging unit, after terminating, judges the type of described CS voice conversation for circuit switching (CS) voice conversation;
CSFB search unit, during for judging that when judging unit the type of described CS voice conversation is circuit domain dropping CSFBCS voice conversation type, searches for the LTE frequency point prestored in the very first time length pre-set; The described LTE frequency point prestored is the LTE frequency point of the resident mistake of LTE terminal;
SRVCC search unit, during for judging that when judging unit the type of described CS voice conversation is SRVCCCS voice conversation type, searches for the LTE frequency point prestored in the second time span pre-set;
Resident element, for any one LTE frequency point in the LTE frequency point that prestores described in searching when CSFB search unit or SRVCC search unit, and the LTE frequency point searched is when being available frequency, the LTE frequency point searched described in residing in, to return LTE network.
7. device as claimed in claim 6, it is characterized in that, described device also comprises:
2G/3G search unit, during for judging that when judging unit the type of described CS voice conversation is 2G/3GCS voice conversation type, according to the order of the residence time in the LTE frequency point prestored near to far away, the LTE frequency point choosing predetermined number from the described LTE frequency point prestored is searched for.
8. device as claimed in claim 7, is characterized in that, when judging that the type of described CS voice conversation is CSFBCS voice conversation type or 2G/3GCS voice conversation type; Then
Described device also comprises:
One VoLTE judging unit, for judging whether the LTE network that described resident element returns supports VoLTE;
First processing unit, during for judging described LTE network support VoLTE when a VoLTE judging unit, send IP Multimedia System Packet Data Network IMSPDN to described LTE network and set up request, after described IMSPDN sets up, IMS registration request is sent to described LTE network, and after IMS registration completes, indicate described LTE terminal next time voice conversation time, adopt VoLTE carry out voice conversation; When a VoLTE judging unit judges that described LTE network does not support VoLTE, indicate described LTE terminal next time voice conversation time, adopt CSFB to carry out voice conversation.
9. device as claimed in claim 7, is characterized in that, when judging that the type of described CS voice conversation is SRVCCCS voice conversation type; Then
Described device also comprises:
2nd VoLTE judging unit, for judging whether the LTE network that described resident element returns supports VoLTE;
Second processing unit, during for judging described LTE network support VoLTE when the 2nd VoLTE judging unit, IMS initial registration request or IMS refresh registration request is sent to described LTE network by the state of IMS registration timer, and after IMS registration completes, indicate described LTE terminal next time voice conversation time, adopt VoLTE carry out voice conversation; When the 2nd VoLTE judging unit judges that described LTE network does not support VoLTE, send IMS to described LTE network and remove registration request, and delete the IMSPDN that sets up in advance, and indicate described LTE terminal next time voice conversation time, adopt CSFB to carry out voice conversation.
10. the device as described in as arbitrary in claim 6 ~ 9, it is characterized in that, described very first time length is greater than described second time span.
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| CN108207019A (en) * | 2016-12-19 | 2018-06-26 | 北京小米移动软件有限公司 | The method and device of registered network |
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| CN108307418A (en) * | 2017-12-28 | 2018-07-20 | 中国移动通信集团江苏有限公司 | The weak coverage cell recognition methods of LTE, device, equipment and medium |
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