CN104159262B - Again the method and apparatus for accessing LTE network - Google Patents
Again the method and apparatus for accessing LTE network Download PDFInfo
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- CN104159262B CN104159262B CN201410395995.6A CN201410395995A CN104159262B CN 104159262 B CN104159262 B CN 104159262B CN 201410395995 A CN201410395995 A CN 201410395995A CN 104159262 B CN104159262 B CN 104159262B
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Abstract
The embodiment of the invention discloses a kind of method and apparatus for accessing LTE network again.Methods described includes：After the circuit domain business that mobile terminal is initiated by circuit domain rollback mode terminates, predetermined tolerance time is spaced, the network type of the current institute's access network of mobile terminal is detected；When the network type of current institute's access network is not LTE network, the initial attachment flows of NAS are actively initiated, LTE network is accessed again to realize.The present invention solves prior art when mobile terminal does not have autonomous FR functions, after circuit domain rollback, again the time delay needed for access LTE network is very long, in some extreme environments, even the technical problem of LTE network can not be accessed again, realize no matter whether mobile terminal has autonomous FR functions, can access LTE network again after circuit domain rollback, improve the network insertion quality of LTE network.
Description
Technical field
The present embodiments relate to mobile communication technology, more particularly to a kind of method and apparatus for accessing LTE network again.
Background technology
LTE (Long Term Evolution, Long Term Evolution) is 3G (The 3rd Generation
Telecommunication, 3G (Third Generation) Moblie) evolution, be 3G to 4G (the Generation mobile of the 4
Communication technology, forth generation mobile communication technology) transitional technology between technology, LTE network is
One has high-speed, low time delay, and supports the mobile communications network of a variety of access technologies.But, in the lte networks, eventually
End can not transmission circuit domain (CS, Circuit Switched) voice service signal, in order that terminal LTE access under energy
The circuit domain business such as speech are enough initiated, and receive the paging of the circuit domain business such as speech, CSFB (Circuit Switched
Fallback, circuit domain retracts) technology arises at the historic moment.
CSFB is a kind of voice solution of the LTE network early stage of development, is that one kind of most operator's selections is transitional
Voice solution.CSFB main implementation process is：If terminal carries out packet domain (PS, Packet Switch) business
When reside in LTE network, and terminal needs to initiate or during the business of receiving circuit domain, it is necessary to retract to 2G (Second
Generation, second generation digital mobile communication) or 3G network to complete corresponding voice service.Completed in voice service
Afterwards, terminal returns to LTE network.
In the prior art, if mobile terminal has autonomous FR (Fast Return, quick to return) function, then in electricity
Road domain retract after, can directly return to LTE network, if mobile terminal do not have autonomous FR functions if, return need according to
2G->3G->4G mode bridges return.I.e.：Terminal is resident 2G networks, and 3G nets are returned according to the neighboring BS information in 2G Web broadcasts
Network, returns to 4G networks further according to the LTE neighboring BS information of broadcast afterwards.In the case, 2G->3G->4G return time delay is very long.
Also, if terminal be in have 2G/4G cover but without 3G covering region when, will be unable to turn again to 4G networks.Wherein, on
The realization of autonomous FR functions is stated, is the cell for carrying autonomous FR marks for the transmission that core net passes through the mobile terminal received
Afterwards, the LTE network initiated by core net is searched for.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of method and apparatus for accessing LTE network again, existing to optimize
Mobile terminal accesses the technology of LTE network again after the circuit domain business that circuit domain rollback mode is initiated terminates, and meets people
Growing personalization, the quality requirement of the LTE network of facilitation.
In a first aspect, the embodiments of the invention provide it is a kind of again access LTE network method, including：
After the circuit domain business that mobile terminal is initiated by circuit domain rollback mode terminates, when being spaced predetermined tolerance limit
Between, detect the network type of the current institute's access network of mobile terminal；
When the network type of current institute's access network is not LTE network, NAS (Non-Access are actively initiated
Stratum, Non-Access Stratum) initial attachment flow, LTE network is accessed to realize again.
In second aspect, the embodiments of the invention provide a kind of device for accessing LTE network again, including：
Present access network determining unit, for the circuit domain business initiated in mobile terminal by circuit domain rollback mode
After end, predetermined tolerance time is spaced, the network type of the current institute's access network of mobile terminal is detected；
When LTE network access unit again for the network type in current institute's access network is not LTE network, actively
The initial attachment flows of NAS are initiated, LTE network is accessed again to realize.
The embodiment of the present invention by after the circuit domain business that mobile terminal is initiated by circuit domain rollback mode terminates,
Every predetermined tolerance time, the network type of the current institute's access network of mobile terminal is detected；In the network of current institute's access network
When type is not LTE network, the initial attachment flows of Non-Access Stratum NAS are actively initiated, to realize the technology for accessing LTE network again
Means, solve prior art when mobile terminal does not have autonomous FR functions, after circuit domain rollback, LTE nets are accessed again
Time delay needed for network is very long, in some extreme environments, or even can not access the technical problem of LTE network again, realizes nothing
Whether there is autonomous FR functions by mobile terminal, can access LTE network again after circuit domain rollback, improve LTE nets
The network insertion quality of network.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the method for LTE network of access again of first embodiment of the invention；
Fig. 2 is a kind of flow chart of the method for LTE network of access again of second embodiment of the invention；
Fig. 3 is a kind of flow chart of the method for LTE network of access again of third embodiment of the invention；
Fig. 4 is a kind of flow chart of the method for LTE network of access again of fourth embodiment of the invention；
Fig. 5 is a kind of structure chart of the device of LTE network of access again of fifth embodiment of the invention.
Embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with the accompanying drawings to specific reality of the invention
Example is applied to be described in further detail.It is understood that specific embodiment described herein is used only for explaining the present invention,
Rather than limitation of the invention.It also should be noted that, for the ease of description, it illustrate only in accompanying drawing related to the present invention
Part rather than full content.
First embodiment
Fig. 1 is a kind of flow chart of the method for LTE network of access again of first embodiment of the invention, the side of the present embodiment
Method can be performed by the device for accessing LTE network again, and the device can be realized by way of hardware and/or software, and one
As be integrated in the mobile terminal of accessible LTE network.The method of the present embodiment specifically includes following steps：
Step 110, after the circuit domain business that mobile terminal is initiated by circuit domain rollback mode terminates, be spaced it is predetermined
Tolerance time, detects the network type of the current institute's access network of mobile terminal.
In the present embodiment, mobile terminal is when carrying out the data service of packet domain by LTE network, for example, passing through LTE
Network online or download etc., if receive the service announcements of circuit domain, for example, the speech businesses such as phone notice is taken,
Mobile terminal can return back to circuit domain by CSFB modes, to carry out circuit domain business.Retracted in mobile terminal by circuit domain
When mode initiates circuit domain business, mobile terminal can detect the done state of the circuit domain business, for example, if produce on-hook letter
Number etc..After mobile terminal determines that the circuit domain business initiated by CSFB modes terminates, predetermined tolerance time is spaced, it is mobile
Terminal can detect the network type of itself current institute's access network.
Wherein, the tolerance time can be preset according to actual conditions, for example, 10s, 15s or 20s etc., this reality
Apply example and be not limited.
Wherein, the network type of the current institute's access network of mobile terminal refers to the mobile radio communication that mobile terminal is currently connected into
The network type of network, for example：GSM (Global System For Mobile Communications, global mobile communication system
System), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, time division synchronous
CDMA) or TD-LTE (Time Division Long Term, timesharing Long Term Evolution) etc..
In the present embodiment, mobile terminal can be installed by it operating system (for example, android system or
IOS systems etc.) interface function that provides obtains above-mentioned network type.For example, if the operation installed on mobile terminal
System is android system, then the getType () function that can be provided by android system obtains current access network
Network type whether be mobile network, if so, can then pass through the NetworksInfo objects provided in android system
GetSubType () function and getSubTypeName () get network type corresponding with the mobile network and name.
Step 120, when the network type of current institute's access network is not LTE network, actively initiate NAS and initially adhere to stream
Journey, LTE network is accessed to realize again.
In the present embodiment, if mobile terminal detects that the network type of itself present access network is not LTE network,
Mobile terminal can actively initiate the initial attachment flows of NAS, and LTE network is accessed again to realize.
Wherein, by taking the network type of CONTINENTAL AREA OF CHINA as an example, its LTE network mainly includes：TD-LTE and FDD-LTE
Two kinds of (Frequency Division Duplexing Long Term, FDD Long Term Evolution).
In the prior art, if mobile terminal has autonomous FR (Fast Return, quick to return) function, then move
Terminal can directly return to LTE network, implement original after the circuit domain business initiated by circuit domain rollback mode terminates
Reason is mainly：
Mobile terminal with autonomous FR functions, can be to core in the circuit domain business initiated by circuit domain rollback mode
" CSFB Indication " cells, core net is according to the above-mentioned cell received, and it is CSFB to determine the mobile terminal for the transmission of heart net
User, after the mobile terminal completes circuit domain business, core net can indicate that the user returns to LTE network immediately.In short, logical
Cross autonomous FR functions and quickly return to LTE network and initiated by core net, if mobile terminal does not have quick FR functions, core
Net then None- identified CSFB user, also can not just indicate that the mobile terminal is quickly back to LTE network.
In embodiment, after mobile terminal terminates in the circuit domain business initiated by circuit domain rollback mode, pass through
It is autonomous to initiate the initial attachment flows of NAS to core net, to realize again access LTE network.
Wherein, mobile terminal services (accessing LTE network in other words) to obtain NAS from network, the NAS nodes in network
It must be known by the information about mobile terminal.For this purpose, mobile terminal has to initiate initial attaching process, the process
It must be performed in mobile terminal-opening and initial access network.Once it will be built on process success, network node
Found the related context of what a mobile terminal, and the default bearing between mobile terminal and grouped data webmaster is also built up
, also distributed IP (Internet Protocol, Internet protocol) address.When mobile terminal has been based on IP UNICOMs, its
Can be to be serviced using IP-based LTE network.
In the present embodiment, mobile terminal can actively be sent out when the network type of current institute's access network is not LTE network
The initial attachment flows of NAS are played, LTE network is accessed again to realize.
The embodiment of the present invention by after the circuit domain business that mobile terminal is initiated by circuit domain rollback mode terminates,
Every predetermined tolerance time, the network type of the current institute's access network of mobile terminal is detected；In the network of current institute's access network
When type is not LTE network, the initial attachment flows of Non-Access Stratum NAS are actively initiated, to realize the technology for accessing LTE network again
Means, solve prior art when mobile terminal does not have autonomous FR functions, after circuit domain rollback, LTE nets are accessed again
Time delay needed for network is very long, in some extreme environments, or even can not access the technical problem of LTE network again, realizes nothing
Whether there is autonomous FR functions by mobile terminal, can access LTE network again after circuit domain rollback, improve LTE nets
The network insertion quality of network.
On the basis of the various embodiments described above, the span of the tolerance time T can specifically include：t1<T<t2；Its
In, t1 is the theoretical time for returning to LTE network after completion circuit domain retracts with the autonomous quick terminal for returning to function；T2 is
The theoretical time of LTE network is returned after circuit domain rollback is completed without the autonomous quick terminal for returning to function.So set
Benefit be：The method of the present embodiment can be allowd to be applied to the mobile terminal with autonomous FR functions simultaneously and do not have
The mobile terminal of autonomous FR functions, it is possible to so that the mobile terminal without autonomous FR functions retracts mode by circuit domain
After the circuit domain business of initiation terminates, LTE network can be quickly returned.
In general, the reason of LTE network is returned after circuit domain rollback is completed with the autonomous quick terminal for returning to function
By time 500ms, without the autonomous quick terminal for returning to function when completing to return to the theory of LTE network after circuit domain retracts
Between be 30s, in the present embodiment, tolerance time T preferably can be set to 10s, then mobile terminal passing through circuit domain return
After the circuit domain business that the mode of moving back is initiated terminates, wait after 10s, the network type of the detection current institute's access network of mobile terminal is
No is LTE network, if it is not, then mobile terminal actively initiates the initial attachment flows of NAS, to realize that terminal device is quickly back to
LTE network.
Second embodiment
Fig. 2 is a kind of flow chart of the method for LTE network of access again of second embodiment of the invention.It is more than the present embodiment
State and optimize based on embodiment, in the present embodiment, being initiated in mobile terminal by circuit domain rollback mode preferably
After circuit domain business terminates, predetermined tolerance time is spaced, before the network type for detecting the current institute's access network of mobile terminal,
Also include：When detecting circuit domain rollback instruction, record mobile terminal is carrying out the LTE nets of the preceding registration of circuit domain rollback
The network parameter of network；
It is preferred that step is actively initiated to the initial attachment flows of NAS, with realize again access LTE network be optimized for：According to
The network parameter of record, sets up after RRC (Radio Resource Contro, wireless heterogeneous networks) connections, described
In RRC connections, the initial attachment flows of NAS are actively initiated, LTE network is accessed again to realize.
Accordingly, the method for the present embodiment comprises the following steps：
Step 210, detect circuit domain retract instruction when, record mobile terminal noted before the circuit domain retracts
The network parameter of the LTE network of volume.
In the present embodiment, mobile terminal is when detecting circuit rollback instruction, and record mobile terminal is carrying out the electricity
The network parameter of the LTE network of registration before road domain retracts.
Wherein, the network parameter of mobile terminal records can only include mobile terminal note before the circuit domain rollback is carried out
The network frequency of the LTE network of volume；Mobile terminal can also only be included and carrying out the LTE network of registration before the circuit domain retracts
Network frequency range；Mobile terminal can also be included simultaneously and carrying out the network frequency of the LTE network of registration before the circuit domain retracts
Point and network frequency range, to this and are not limited.
Step 220, after the circuit domain business that mobile terminal is initiated by circuit domain rollback mode terminates, be spaced it is predetermined
Tolerance time, detects the network type of the current institute's access network of mobile terminal.
Whether step 230, the network type for judging current institute's access network are LTE network：If it is not, performing step 240；It is no
Then, step 250 is performed.
Step 240, the network parameter according to record, set up after RRC connections, in the RRC connections, actively initiate
The initial attachment flows of NAS, LTE network is accessed to realize again.
In the prior art, if mobile terminal want access LTE network, it is necessary to first on specific frequency with it is evolved
RRC connections are set up in base station, afterwards in the RRC connections of foundation, initiate the initial attachment flows of NAS to access LTE network.Wherein,
Mobile terminal can be by multiple frequency ranges corresponding with LTE network, choosing frequency by order and attempting to set up the side of connection
Formula, to realize that setting up RRC with evolved base station is connected.This mode for setting up RRC connections needs to attempt multiple frequencies, access
Time delay needed for LTE network is larger.
In the present embodiment, mobile terminal is joined according to the network in the LTE network registered before the circuit domain retracts
Number, to set up RRC connections.The reason for so setting allows for mobile terminal user after circuit domain business is completed, with very big
Possibility also reside in the LTE network cell of last time registration, therefore, the network parameter also registered using last time is accessed
LTE network, access LTE network that can be quickly, time delay is small, efficiency high.
In the present embodiment, mobile terminal can be according only in the LTE network registered before the circuit domain retracts
Network frequency sets up RRC connections；Can also be according only to the network frequency in the LTE network registered before the circuit domain retracts
Section sets up RRC connections；Can also simultaneously according to carry out before the circuit domain retracts the network frequency of the LTE network of registration with
Network frequency range sets up RRC connections, to this and is not limited.
Step 250, end flow.
The embodiment of the present invention by after the circuit domain business that mobile terminal is initiated by circuit domain rollback mode terminates,
Every predetermined tolerance time, the network type of the current institute's access network of mobile terminal is detected；In the network of current institute's access network
When type is not LTE network, the initial attachment flows of Non-Access Stratum NAS are actively initiated, to realize the technology for accessing LTE network again
Means, solve prior art when mobile terminal does not have autonomous FR functions, after circuit domain rollback, LTE nets are accessed again
Time delay needed for network is very long, in some extreme environments, or even can not access the technical problem of LTE network again, realizes nothing
Whether there is autonomous FR functions by mobile terminal, can access LTE network again after circuit domain rollback, improve LTE nets
The network insertion quality of network.
3rd embodiment
Fig. 3 is a kind of flow chart of the method for LTE network of access again of third embodiment of the invention.It is more than the present embodiment
State and optimize based on embodiment, in the present embodiment, the network parameter of record is preferably included：Mobile terminal is being carried out
The network frequency range and network frequency of the LTE network of registration before the circuit domain retracts；
It is preferred that by the network parameter of the step according to record, set up after RRC connections, in the RRC connections, actively
The initial attachment flows of NAS are initiated, to realize that access LTE network is optimized for again：According to the network frequency, RRC connections are set up；
RRC connections are set up if failed on the network frequency, target frequency are searched in the network frequency range, according to target
Frequency is set up after target RRC connections, in the target RRC connections, actively initiates the initial attachment flows of NAS, to realize again
Access LTE network.
Accordingly, the method for the present embodiment comprises the following steps：
Step 310, detect circuit domain retract instruction when, record mobile terminal noted before the circuit domain retracts
The network frequency range and network frequency of the LTE network of volume.
Step 320, after the circuit domain business that mobile terminal is initiated by circuit domain rollback mode terminates, be spaced it is predetermined
Tolerance time, detects the network type of the current institute's access network of mobile terminal.
Whether step 330, the network type for judging current institute's access network are LTE network：If it is not, performing step 340；It is no
Then, step 350 is performed.
Step 340, according to the network frequency, set up RRC connections, perform step 360.
In the present embodiment, mobile terminal is attempted to set up RRC connections first according to the network frequency, if it is possible to success
RRC connections are set up, then in the RRC connections set up according to the network frequency, the initial attachment flows of NAS are actively initiated, with reality
LTE network is now accessed again；
If RRC connections can not be successfully established, obtain frequency successively in the network frequency range and attempt to set up RRC companies
Connect, if RRC connections are set up in success on a frequency, regard the frequency as target frequency.
Step 350, end flow.
Step 360, judge RRC connections whether are successfully established on the network frequency：If it is not, performing step 370；It is no
Then, step 380 is performed.
Step 370, the lookup target frequency in the network frequency range, set up after target RRC connections according to target frequency,
In the target RRC connections, the initial attachment flows of NAS are actively initiated, LTE network is accessed again to realize.
Step 380, in the RRC connections set up according to the network frequency, actively initiate the initial attachment flows of NAS, with
Realization accesses LTE network again.
The embodiment of the present invention by after the circuit domain business that mobile terminal is initiated by circuit domain rollback mode terminates,
Every predetermined tolerance time, the network type of the current institute's access network of mobile terminal is detected；In the network of current institute's access network
When type is not LTE network, the initial attachment flows of Non-Access Stratum NAS are actively initiated, to realize the technology for accessing LTE network again
Means, solve prior art when mobile terminal does not have autonomous FR functions, after circuit domain rollback, LTE nets are accessed again
Time delay needed for network is very long, in some extreme environments, or even can not access the technical problem of LTE network again, realizes nothing
Whether there is autonomous FR functions by mobile terminal, can access LTE network again after circuit domain rollback, improve LTE nets
The network insertion quality of network.
Fourth embodiment
Fig. 4 is a kind of flow chart of the method for LTE network of access again of fourth embodiment of the invention.It is more than the present embodiment
State and optimize based on embodiment, in the present embodiment, the network parameter of record is preferably included：Mobile terminal is being carried out
The network frequency range and network frequency of the LTE network of registration before the circuit domain retracts；
It is preferred that also including step：In the implementation procedure of the circuit domain business, the change in location ginseng of record mobile terminal
Number；
It is preferred that by the network parameter of the step according to record, set up after RRC connections, in the RRC connections, actively
The initial attachment flows of NAS are initiated, to realize that access LTE network is specifically optimized for again：If the change in location parameter is met
Preselected threshold condition, according to the network frequency, sets up after the first RRC connections, in the first RRC connections, actively initiates
The initial attachment flows of NAS, LTE network is accessed to realize again；Otherwise, target frequency is searched in the network frequency range and sets up the
After two RRC connections, in the 2nd RRC connections, the initial attachment flows of NAS are actively initiated, LTE nets are accessed again to realize
Network.
Accordingly, the method for the present embodiment comprises the following steps：
Step 410, detect circuit domain retract instruction when, record mobile terminal noted before the circuit domain retracts
The network frequency range and network frequency of the LTE network of volume.
Step 420, in the implementation procedure of the circuit domain business, record mobile terminal change in location parameter.
In the present embodiment, more there is specific aim in order that obtaining and subsequently setting up the network parameter used during RRC connections, moves
Dynamic terminal records the change in location parameter of mobile terminal in the implementation procedure of the circuit domain business.
In the present embodiment, the change in location parameter can include at least one of following：Average translational speed, maximum shifting
Dynamic speed and mobile distance.
Mobile terminal is according in the circuit domain business implementation procedure, and the change in location parameter value of mobile terminal comes final
It is determined which kind of network parameter to set up RRC connections using.
Step 430, after the circuit domain business that mobile terminal is initiated by circuit domain rollback mode terminates, be spaced it is predetermined
Tolerance time, detects the network type of the current institute's access network of mobile terminal.
Whether step 440, the network type for judging current institute's access network are LTE network：If it is not, performing step 450；It is no
Then, step 460 is performed.
Step 450, judge whether the change in location parameter meets preselected threshold condition：If so, performing step 470；It is no
Then, step 480 is performed.
In the present embodiment, if mobile terminal determines that mobile terminal does not have highly significant according to change in location parameter
During change in location while meeting preselected threshold condition (above-mentioned in other words), then attempt to set up RRC connections using the network frequency；
Otherwise, then attempt to set up RRC connections using the network frequency range.
For example, the preselected threshold condition can be set to using maximum translational speed as change in location parameter：
Maximum translational speed is less than speed threshold value；Can also be using mobile distance as change in location parameter, by the predetermined threshold bar
Part is set to：Mobile distance is less than distance threshold value；Can also be using average translational speed as change in location parameter, will be described pre-
Determine threshold condition to be set to：Average translational speed is less than average speed threshold value etc., can also by two in above-mentioned parameter or
Person all as change in location parameter and sets corresponding preselected threshold condition etc., to this and is not limited.
Step 460, end flow.
Step 470, according to the network frequency, set up after the first RRC connections, in the first RRC connections, actively send out
The initial attachment flows of NAS are played, LTE network is accessed again to realize.
Step 480, in the network frequency range search target frequency set up after the 2nd RRC connections, the 2nd RRC company
Connect, actively initiate the initial attachment flows of NAS, LTE network is accessed again to realize.
The embodiment of the present invention by after the circuit domain business that mobile terminal is initiated by circuit domain rollback mode terminates,
Every predetermined tolerance time, the network type of the current institute's access network of mobile terminal is detected；In the network of current institute's access network
When type is not LTE network, the initial attachment flows of Non-Access Stratum NAS are actively initiated, to realize the technology for accessing LTE network again
Means, solve prior art when mobile terminal does not have autonomous FR functions, after circuit domain rollback, LTE nets are accessed again
Time delay needed for network is very long, in some extreme environments, or even can not access the technical problem of LTE network again, realizes nothing
Whether there is autonomous FR functions by mobile terminal, can access LTE network again after circuit domain rollback, improve LTE nets
The network insertion quality of network.
On the basis of the various embodiments described above, methods described can also include：Failing to accessing LTE network again, adjust
With the default network search configuration file prestored, web search is re-started.The benefit so set is：Pass through in mobile terminal
It can not still be accessed under the extreme case of LTE network after the LTE network search of active, for example, user is moved to without LTE nets
When in the cell of network covering, it is ensured that mobile terminal can be returned in 2G or 3G network, it is ensured that the embodiment of the present invention it is suitable
With scope, the networking experience of mobile terminal is improved.
5th embodiment
Figure 5 illustrates a kind of structure chart of the device of LTE network of access again of fifth embodiment of the invention.As schemed
Shown in 5, described device includes：
Present access network determining unit 51, for the circuit domain industry initiated in mobile terminal by circuit domain rollback mode
After business terminates, predetermined tolerance time is spaced, the network type of the current institute's access network of mobile terminal is detected；
It is main when LTE network access unit 52 again for the network type in current institute's access network are not LTE networks
It is dynamic to initiate the initial attachment flows of Non-Access Stratum NAS, LTE network is accessed again to realize.
The embodiment of the present invention by after the circuit domain business that mobile terminal is initiated by circuit domain rollback mode terminates,
Every predetermined tolerance time, the network type of the current institute's access network of mobile terminal is detected；In the network of current institute's access network
When type is not LTE network, the initial attachment flows of Non-Access Stratum NAS are actively initiated, to realize the technology for accessing LTE network again
Means, solve prior art when mobile terminal does not have autonomous FR functions, after circuit domain rollback, LTE nets are accessed again
Time delay needed for network is very long, in some extreme environments, or even can not access the technical problem of LTE network again, realizes nothing
Whether there is autonomous FR functions by mobile terminal, can access LTE network again after circuit domain rollback, improve LTE nets
The network insertion quality of network.
On the basis of the various embodiments described above, the span of the tolerance time T can specifically include：t1<T<t2；Its
In, t1 is the theoretical time for returning to LTE network after completion circuit domain retracts with the autonomous quick terminal for returning to function；T2 is
The theoretical time of LTE network is returned after circuit domain rollback is completed without the autonomous quick terminal for returning to function.
On the basis of the various embodiments described above, described device can also include, and network parameter determining unit is used for：Moving
After the circuit domain business that dynamic terminal is initiated by circuit domain rollback mode terminates, predetermined tolerance time is spaced, detection is mobile eventually
Before the network type for holding current institute's access network, when detecting circuit domain rollback instruction, record mobile terminal is carrying out institute
State the network parameter of the LTE network of registration before circuit domain retracts；
The LTE network again access unit specifically for：According to the network parameter of record, Radio Resource control is set up
After RRC connections processed, in the RRC connections, the initial attachment flows of NAS are actively initiated, LTE network is accessed again to realize.
On the basis of the various embodiments described above, network parameter determining unit specifically can be used for：Record mobile terminal is entering
The network frequency range and network frequency of the LTE network of registration before the row circuit domain retracts；
The LTE network again access unit further specifically for：According to the network frequency, RRC connections are set up；Such as
Fruit fails on the network frequency sets up RRC connections, and target frequency is searched in the network frequency range, according to target frequency
Point is set up after target RRC connections, in the target RRC connections, actively initiates the initial attachment flows of NAS, is connect again with realizing
Enter LTE network.
On the basis of the various embodiments described above, network parameter determining unit specifically can be used for：Record mobile terminal is entering
The network frequency range and network frequency of the LTE network of registration before the row circuit domain retracts；
Described device can also include, change in location reference record unit, be used for：In the execution of the circuit domain business
Cheng Zhong, records the change in location parameter of mobile terminal；
Again access unit further specifically can be used for the LTE network：If the change in location parameter meets pre-
Determine threshold condition, according to the network frequency, set up after the first RRC connections, in the first RRC connections, actively initiate NAS
Beginning attachment flow, LTE network is accessed to realize again；Otherwise, target frequency is searched in the network frequency range and sets up the 2nd RRC
After connection, in the 2nd RRC connections, the initial attachment flows of NAS are actively initiated, LTE network is accessed again to realize.
On the basis of the various embodiments described above, the change in location parameter includes at least one of following：Average translational speed,
Maximum translational speed and mobile distance.
On the basis of the various embodiments described above, described device can also include：
The whole network search unit, for failing to access LTE network again, calling the default network search configuration prestored text
Part, re-starts web search.
The device for the LTE network of access again that the embodiment of the present invention is provided can be used for execution any embodiment of the present invention to carry
The method for accessing LTE network again supplied, possesses corresponding functional module, realizes identical beneficial effect.
Obviously, it will be understood by those skilled in the art that above-mentioned each module of the invention or each step can be by as above
Described server implementation.Alternatively, the embodiment of the present invention can be realized with the executable program of computer installation, so as to
Performed with being stored in storage device by processor, described program can be stored in a kind of computer-readable storage
In medium, storage medium mentioned above can be read-only storage, disk or CD etc.；Or be fabricated to them respectively each
Individual integrated circuit modules, or the multiple modules or step in them are fabricated to single integrated circuit module to realize.So,
The present invention is not restricted to the combination of any specific hardware and software.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art
For, the present invention can have various changes and change.It is all any modifications made within spirit and principles of the present invention, equivalent
Replace, improve etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of method for accessing Long Term Evolution LTE network again, it is characterised in that including：
When detecting circuit domain rollback instruction, record mobile terminal is carrying out the LTE network of the preceding registration of circuit domain rollback
Network parameter；
After the circuit domain business that mobile terminal is initiated by circuit domain rollback mode terminates, predetermined tolerance time, inspection are spaced
Survey the network type of the current institute's access network of mobile terminal；
When the network type of current institute's access network is not LTE network, according to the network parameter of record, wireless money is set up
After the control RRC connections of source, in the RRC connections, the initial attachment flows of NAS are actively initiated, LTE nets are accessed again to realize
Network.
2. according to the method described in claim 1, it is characterised in that the span of the tolerance time T is specifically included：t1<T
<t2；
Wherein, t1 is the terminal with autonomous quick return function when completing to return to the theory of LTE network after circuit domain retracts
Between；T2 is the theoretical time for returning to LTE network after completion circuit domain retracts without the autonomous quick terminal for returning to function.
3. according to the method described in claim 1, it is characterised in that the network parameter of record is specifically included：Mobile terminal
Carrying out the network frequency range and network frequency of the LTE network of registration before the circuit domain retracts；
According to the network parameter of record, set up after RRC connections, in the RRC connections, actively initiate NAS and initially adhere to
Flow, to realize that access LTE network is specifically included again：
According to the network frequency, RRC connections are set up；
RRC connections are set up if failed on the network frequency, target frequency is searched in the network frequency range, according to
Target frequency is set up after target RRC connections, in the target RRC connections, actively initiates the initial attachment flows of NAS, to realize
Again LTE network is accessed.
4. according to the method described in claim 1, it is characterised in that：The network parameter of record is specifically included：Carry out described
The network frequency range and network frequency of the LTE network of registration before circuit domain retracts；
Methods described also includes：
In the implementation procedure of the circuit domain business, the change in location parameter of mobile terminal is recorded；
According to the network parameter of record, set up after RRC connections, in the RRC connections, actively initiate NAS and initially adhere to
Flow, to realize that access LTE network is specifically included again：
If the change in location parameter meets preselected threshold condition, according to the network frequency, set up after the first RRC connections,
In the first RRC connections, the initial attachment flows of NAS are actively initiated, LTE network is accessed again to realize；Otherwise, described
Target frequency is searched in network frequency range to set up after the 2nd RRC connections, in the 2nd RRC connections, actively initiates NAS initially attached
Flow, LTE network is accessed again to realize.
5. method according to claim 4, it is characterised in that the change in location parameter includes at least one of following：
Average translational speed, maximum translational speed and mobile distance.
6. the method according to claim any one of 1-5, it is characterised in that also include：
Failing to accessing LTE network again, the default network search configuration file prestored is called, web search is re-started.
7. a kind of device for accessing Long Term Evolution LTE network again, it is characterised in that including：
Network parameter determining unit, for when detecting circuit domain rollback instruction, record mobile terminal to carry out the circuit
The network parameter of the LTE network of registration before domain retracts；
Present access network determining unit, the circuit domain business for being initiated in mobile terminal by circuit domain rollback mode terminates
Afterwards, predetermined tolerance time is spaced, the network type of the current institute's access network of mobile terminal is detected；
When LTE network access unit again for the network type in current institute's access network is not LTE network, according to record
The network parameter, set up radio resource control RRC connection after, in the RRC connections, actively initiate NAS and initially adhere to
Flow, LTE network is accessed to realize again.
8. device according to claim 7, it is characterised in that the span of the tolerance time T is specifically included：t1<T
<t2；
Wherein, t1 is the terminal with autonomous quick return function when completing to return to the theory of LTE network after circuit domain retracts
Between；T2 is the theoretical time for returning to LTE network after completion circuit domain retracts without the autonomous quick terminal for returning to function.
9. device according to claim 7, it is characterised in that network parameter determining unit specifically for：Record is mobile eventually
Hold and carrying out the network frequency range and network frequency of the LTE network of registration before the circuit domain retracts；
The LTE network again access unit further specifically for：
According to the network frequency, RRC connections are set up；
RRC connections are set up if failed on the network frequency, target frequency is searched in the network frequency range, according to
Target frequency is set up after target RRC connections, in the target RRC connections, actively initiates the initial attachment flows of NAS, to realize
Again LTE network is accessed.
10. device according to claim 7, it is characterised in that：Network parameter determining unit specifically for：Record is mobile eventually
Hold and carrying out the network frequency range and network frequency of the LTE network of registration before the circuit domain retracts；
Described device also includes, change in location reference record unit, is used for：
In the implementation procedure of the circuit domain business, the change in location parameter of mobile terminal is recorded；
The LTE network again access unit further specifically for：
If the change in location parameter meets preselected threshold condition, according to the network frequency, set up after the first RRC connections,
In the first RRC connections, the initial attachment flows of NAS are actively initiated, LTE network is accessed again to realize；Otherwise, in institute
State lookup target frequency in network frequency range to set up after the 2nd RRC connections, in the 2nd RRC connections, actively initiate NAS initial
Attachment flow, LTE network is accessed to realize again.
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| CN201410395995.6A CN104159262B (en) | 2014-08-12 | 2014-08-12 | Again the method and apparatus for accessing LTE network |
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| CN201410395995.6A CN104159262B (en) | 2014-08-12 | 2014-08-12 | Again the method and apparatus for accessing LTE network |
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| US20160212791A1 (en) * | 2015-01-15 | 2016-07-21 | Mediatek Inc. | Methods for efficient wireless communications and communications apparatus utilizing the same |
| CN110505667B (en) * | 2015-02-16 | 2022-01-18 | 展讯通信（上海）有限公司 | User terminal and method and device for processing circuit switching service in LTE system of user terminal |
| CN105430696B (en) * | 2015-11-30 | 2018-11-30 | 中国联合网络通信集团有限公司 | Method for switching network, terminal and server |
| CN106358254A (en) * | 2016-08-31 | 2017-01-25 | 广东欧珀移动通信有限公司 | Network access control method and equipment |
| 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 |
| CN108696382B (en) * | 2017-04-12 | 2022-07-19 | 中兴通讯股份有限公司 | Link recovery method, device and communication node |
| WO2019090649A1 (en) | 2017-11-09 | 2019-05-16 | Oppo广东移动通信有限公司 | Access control method, device, and computer-readable medium and system |
| CN111510881B (en) * | 2020-04-20 | 2022-07-15 | Oppo广东移动通信有限公司 | Information sending method, device, terminal and storage medium |
| CN114980268A (en) * | 2021-02-25 | 2022-08-30 | 北京小米移动软件有限公司 | Network access method and device |
| CN115087062B (en) * | 2022-06-14 | 2024-05-14 | Oppo广东移动通信有限公司 | Network switching method, device, terminal and storage medium |
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