CN104159262A - Method of accessing long term evolution (LTE) network again, and device of accessing LTE network again - Google Patents
Method of accessing long term evolution (LTE) network again, and device of accessing LTE network again Download PDFInfo
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- CN104159262A CN104159262A CN201410395995.6A CN201410395995A CN104159262A CN 104159262 A CN104159262 A CN 104159262A CN 201410395995 A CN201410395995 A CN 201410395995A CN 104159262 A CN104159262 A CN 104159262A
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Abstract
The embodiment of the present invention discloses a method of accessing an LTE network again, and a device of accessing the LTE network again. The method comprises the steps of after a circuit domain business of a mobile terminal initiated by a circuit switched fallback mode is ended, detecting the type of a current network in which the mobile terminal is accessed at a predetermined tolerance time interval; when the type of the current accessed network is not the LTE network, actively initiating a non-access stratum (NAS) initial adhesion process to access the LTE network again. According to the present invention, the technical problems in the prior art that the mobile terminal dose not possesses an independent fast return (FR) function, so that the time delay of the mobile terminal to access the LTE network is very long after the circuit switched fallback; even on some extreme conditions, the mobile terminal can not access the LTE network again, are solved; the situation that the mobile terminal can be accessed in the LTE network again after the circuit switched fallback no matter whether the mobile terminal possesses the independent FR function or not, is guaranteed; and the network access quality of the LTE network is improved.
Description
Technical field
The embodiment of the present invention relates to mobile communication technology, relates in particular to a kind of method and apparatus that again accesses LTE network.
Background technology
LTE (Long Term Evolution, Long Term Evolution) be 3G (The 3rd Generation Telecommunication, 3G (Third Generation) Moblie) evolution, that 3G is to 4G (the 4 Generation mobile communication technology, the 4th third-generation mobile communication technology) transitional technology between technology, LTE network is one and has two-forty, low time delay, and supports the mobile communications network of multiple access technology.But, in LTE network, terminal cannot transmission circuit territory (CS, Circuit Switched) voice service signal, under LTE access, can initiate the circuit domain business such as speech in order to make terminal, and receiving the paging of the circuit domain business such as speech, CSFB (Circuit Switched Fallback, circuit domain rollback) technology is arisen at the historic moment.
CSFB is a kind of voice solution at LTE network Development initial stage, is the cambic voice solution of one that most operators are selected.The main implementation procedure of CSFB is: if terminal is carried out packet domain (PS, Packet Switch) reside in LTE network when business, and terminal need to be initiated or when the business of receiving circuit territory, need rollback to 2G (Second Generation, second generation digital mobile communication) or 3G network to complete corresponding voice service.After voice service completes, terminal returns to LTE network.
In the prior art, if mobile terminal has autonomous FR (Fast Return, fast return) function, after circuit domain rollback, can directly return to LTE network, if mobile terminal does not have autonomous FR function, return and need to return according to the mode bridge joint of 2G->3G->4G.That is: the resident 2G network of terminal, according to returning to 3G network at the neighboring BS information of 2G Web broadcast, returns to 4G network according to the LTE neighboring BS information of broadcast afterwards again.In the case, the return time delay of 2G->3G->4G is very long.And, if terminal is in the time having 2G/4G covering but there is no the region of 3G covering, cannot again get back to 4G network.Wherein, after the cell with autonomous FR mark of the transmission that the realization of above-mentioned autonomous FR function is core net by the mobile terminal that receives, the LTE web search of being initiated by core net.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of method and apparatus that again accesses LTE network, to optimize the technology that again accesses LTE network after circuit domain business that existing mobile terminal initiates in circuit domain rollback mode finishes, meet the quality requirement of the LTE network of the growing personalization of people, facilitation.
In first aspect, the embodiment of the present invention provides a kind of method that again accesses LTE network, comprising:
After the circuit domain business of initiating by circuit domain rollback mode at mobile terminal finishes, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network;
In the time that the network type of current institute access network is not LTE network, initiatively initiate the initial attachment flow of NAS (Non-Access Stratum, Non-Access Stratum), again access LTE network to realize.
In second aspect, the embodiment of the present invention provides a kind of device that again accesses LTE network, comprising:
Current access network determining unit, after finishing for the circuit domain business of initiating by circuit domain rollback mode at mobile terminal, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network;
LTE network access unit again, in the time that the network type of current institute access network is not LTE network, initiatively initiates the initial attachment flow of NAS, again accesses LTE network to realize.
After the embodiment of the present invention finishes by the circuit domain business of initiating by circuit domain rollback mode at mobile terminal, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network, in the time that the network type of current institute access network is not LTE network, initiatively initiate the initial attachment flow of Non-Access Stratum NAS, to realize the technological means that again accesses LTE network, solve prior art in the time that mobile terminal does not have autonomous FR function, after circuit domain rollback, again access the required time delay of LTE network very long, under some extreme cases, even cannot again access the technical problem of LTE network, realize no matter whether mobile terminal has autonomous FR function, after circuit domain rollback, can again access LTE network, improve LTE network of network cut-in quality.
Brief description of the drawings
Fig. 1 is the flow chart of a kind of method that again accesses LTE network of first embodiment of the invention;
Fig. 2 is the flow chart of a kind of method that again accesses LTE network of second embodiment of the invention;
Fig. 3 is the flow chart of a kind of method that again accesses LTE network of third embodiment of the invention;
Fig. 4 is the flow chart of a kind of method that again accesses LTE network of fourth embodiment of the invention;
Fig. 5 is the structure chart of a kind of device that again accesses LTE network of fifth embodiment of the invention.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the specific embodiment of the invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, in accompanying drawing, only show part related to the present invention but not full content.
The first embodiment
Fig. 1 is the flow chart of a kind of method that again accesses LTE network of first embodiment of the invention, the method of the present embodiment can be carried out by the device that again accesses LTE network, this device can be realized by the mode of hardware and/or software, and is generally integrated in the mobile terminal of accessible LTE network.The method of the present embodiment specifically comprises the steps:
After step 110, the circuit domain business of initiating by circuit domain rollback mode at mobile terminal finish, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network.
In the present embodiment, mobile terminal is in the time carrying out the data service of packet domain by LTE network, for example, surf the Net or download etc. by LTE network, if while receiving the service announcements of circuit domain, for example, play the speech business notices such as phone, mobile terminal can return back to circuit domain by CSFB mode, to carry out circuit domain business.In the time that mobile terminal is initiated circuit domain business by circuit domain rollback mode, mobile terminal can detect the done state of this circuit domain business, for example, whether produces on-hook signal etc.After mobile terminal determines that the circuit domain business of initiating by CSFB mode finishes, the tolerance limit time that interval is predetermined, mobile terminal can detect the network type of self current institute access network.
Wherein, the described tolerance limit time can preset according to actual conditions, for example, 10s, 15s or 20s etc., the present embodiment does not limit.
Wherein, the network type of the current institute of mobile terminal access network refers to the network type of the current mobile communications network being connected into of mobile terminal, for example: GSM (Global System For Mobile Communications, global system for mobile communications), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, TD SDMA) or TD-LTE (Time Division Long Term, timesharing Long Term Evolution) etc.
In the present embodiment, the interface function that the operating system (for example, Android system or IOS system etc.) that mobile terminal can be installed by it provides obtains above-mentioned network type.For example, if the operating system of installing on mobile terminal is Android system, whether the network type that the getType () function that can provide by Android system obtains current access network is mobile network, if so, can get the network type corresponding with this mobile network and name by getSubType () function and the getSubTypeName () of the NetworksInfo object that provides in Android system.
Step 120, in the time that the network type of current institute access network is not LTE network, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
In the present embodiment, if when the network type of the current access network of mobile terminal detection self is not LTE network, mobile terminal can initiatively be initiated the initial attachment flow of NAS, again accesses LTE network to realize.
Wherein, taking the network type of CONTINENTAL AREA OF CHINA as example, its LTE network mainly comprises: two kinds of TD-LTE and FDD-LTE (Frequency Division Duplexing Long Term, Frequency Division Duplexing (FDD) Long Term Evolution).
In the prior art, if mobile terminal has autonomous FR (Fast Return, fast return) function, mobile terminal is after the circuit domain business of initiating by circuit domain rollback mode finishes, can directly return to LTE network, specific implementation principle mainly:
There is the mobile terminal of autonomous FR function in the time of the circuit domain business of initiating by circuit domain rollback mode, can send " CSFB Indication " cell to core net, core net is according to the above-mentioned cell receiving, determine that this mobile terminal is CSFB user, when after this mobile terminal completing circuit territory business, core net can indicate this user to return to immediately LTE network.In brief, initiated by core net by autonomous FR function fast return LTE network, if mobile terminal does not have quick FR function, core net is this CSFB user of None-identified, also just cannot indicate this mobile terminal fast return to LTE network.
In an embodiment, when mobile terminal is after the circuit domain business of initiating by circuit domain rollback mode finishes, by independently initiating NAS initial attachment flow to core net, again access LTE network to realize.
Wherein, mobile terminal is in order to obtain NAS service (accessing in other words LTE network) from network, and the NAS node in network must be known the information about mobile terminal.For this object, mobile terminal has to initiate initial attaching process, and this process must be performed in the time of mobile terminal-opening and initial access network.Once this process success, on network node, will set up the context that what a this mobile terminal is relevant, and the default bearing between mobile terminal and grouped data webmaster has also been built up, also distribute IP (Internet Protocol, Internet protocol) address.Based on IP UNICOM, it just can use IP-based LTE network service when mobile terminal.
In the present embodiment, mobile terminal, in the time that the network type of current institute access network is not LTE network, can initiatively be initiated the initial attachment flow of NAS, again accesses LTE network to realize.
After the embodiment of the present invention finishes by the circuit domain business of initiating by circuit domain rollback mode at mobile terminal, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network, in the time that the network type of current institute access network is not LTE network, initiatively initiate the initial attachment flow of Non-Access Stratum NAS, to realize the technological means that again accesses LTE network, solve prior art in the time that mobile terminal does not have autonomous FR function, after circuit domain rollback, again access the required time delay of LTE network very long, under some extreme cases, even cannot again access the technical problem of LTE network, realize no matter whether mobile terminal has autonomous FR function, after circuit domain rollback, can again access LTE network, improve LTE network of network cut-in quality.
On the basis of the various embodiments described above, the span of described tolerance limit time T specifically can comprise: t1<T<t2; Wherein, t1 is the theoretical time that the terminal with autonomous fast return function is returned to LTE network after the rollback of completing circuit territory; T2 is the theoretical time that the terminal without autonomous fast return function is returned to LTE network after the rollback of completing circuit territory.The benefit arranging is like this: can make the method for the present embodiment can be applicable to the mobile terminal that has the mobile terminal of autonomous FR function and do not have autonomous FR function simultaneously, and can make the mobile terminal without autonomous FR function after the circuit domain business of initiating by circuit domain rollback mode finishes, can fast return LTE network.
In general, the terminal with autonomous fast return function is returned to the theoretical time 500ms of LTE network after the rollback of completing circuit territory, the theoretical time that the terminal without autonomous fast return function is returned to LTE network after the rollback of completing circuit territory is 30s, in the present embodiment, preferably tolerance limit time T is set to 10s, at mobile terminal after the circuit domain business of initiating by circuit domain rollback mode finishes, wait for after 10s, whether the network type that detects the current institute of mobile terminal access network is LTE network, if not, mobile terminal is initiatively initiated the initial attachment flow of NAS, to realize terminal equipment fast return to LTE network.
The second embodiment
Fig. 2 is the flow chart of a kind of method that again accesses LTE network of second embodiment of the invention.The present embodiment is optimized as basis taking above-described embodiment, in the present embodiment, after preferred circuit domain business of initiating by circuit domain rollback mode at mobile terminal finishes, the tolerance limit time that interval is predetermined, before detecting the network type of the current institute of mobile terminal access network, also comprise: in the time the instruction of circuit domain rollback being detected, record move terminal is in the LTE network of network parameter of carrying out registering before described circuit domain rollback;
Preferably step is initiatively initiated to the initial attachment flow of NAS, taking realize again access the LTE network optimization as: according to record described network parameter, set up RRC (Radio Resource Contro, Radio Resource control) connect after, in described RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
Accordingly, the method for the present embodiment comprises the steps:
Step 210, circuit domain rollback when instruction being detected, record move terminal is in the LTE network of network parameter of carrying out registering before described circuit domain rollback.
In the present embodiment, mobile terminal is in the time the instruction of circuit rollback being detected, and record move terminal is in the LTE network of network parameter of carrying out registering before described circuit domain rollback.
Wherein, the network parameter of mobile terminal records can only comprise that mobile terminal is at the LTE network of network frequency that carries out registering before described circuit domain rollback; Also can only comprise that mobile terminal is in the LTE network of network frequency range of carrying out registering before described circuit domain rollback; Can also comprise that mobile terminal, in LTE network of network frequency and the network frequency range of carrying out registering before described circuit domain rollback, does not limit this simultaneously.
After step 220, the circuit domain business of initiating by circuit domain rollback mode at mobile terminal finish, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network.
Step 230, judge whether the network type of current institute access network is LTE network: if not, execution step 240; Otherwise, execution step 250.
Step 240, according to record described network parameter, set up RRC connect after, in described RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
In the prior art, if mobile terminal wants to access LTE network, need first on specific frequency, to set up RRC with evolved base station and be connected, in the RRC connection of setting up, initiate the initial attachment flow of NAS with access LTE network afterwards.Wherein, mobile terminal can by the multiple frequency ranges corresponding with LTE network, be chosen frequency by order and attempt the mode connecting, and sets up RRC and is connected to realize with evolved base station.The mode that this RRC of foundation connects need to be attempted multiple frequencies, accesses the required time delay of LTE network larger.
In the present embodiment, mobile terminal, according in the LTE network of network parameter of carrying out registering before described circuit domain rollback, is set up RRC and is connected.The reason arranging is like this to consider that mobile phone users is after the business of completing circuit territory, also resides in the LTE network cell of registration last time, therefore with very large possibility, also access LTE network with the network parameter of registration last time, access LTE network that can be very fast, time delay is little, and efficiency is high.
In the present embodiment, mobile terminal can only connect according to set up RRC at the LTE network of network frequency that carries out registering before described circuit domain rollback; Also can only connect according to set up RRC in the LTE network of network frequency range of carrying out registering before described circuit domain rollback; Can also be connected according to setting up RRC at the LTE network of network frequency that carries out registering before described circuit domain rollback with network frequency range simultaneously, this is not limited.
Step 250, process ends.
After the embodiment of the present invention finishes by the circuit domain business of initiating by circuit domain rollback mode at mobile terminal, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network, in the time that the network type of current institute access network is not LTE network, initiatively initiate the initial attachment flow of Non-Access Stratum NAS, to realize the technological means that again accesses LTE network, solve prior art in the time that mobile terminal does not have autonomous FR function, after circuit domain rollback, again access the required time delay of LTE network very long, under some extreme cases, even cannot again access the technical problem of LTE network, realize no matter whether mobile terminal has autonomous FR function, after circuit domain rollback, can again access LTE network, improve LTE network of network cut-in quality.
The 3rd embodiment
Fig. 3 is the flow chart of a kind of method that again accesses LTE network of third embodiment of the invention.The present embodiment is optimized as basis taking above-described embodiment, and in the present embodiment, the described network parameter of record preferably includes: mobile terminal is at the LTE network of network frequency range and the network frequency that carry out registering before described circuit domain rollback;
Preferably by step according to the described network parameter of record, after setting up RRC and connecting, in described RRC connections, initiatively initiate the initial attachment flow of NAS, taking realize again access the LTE network optimization as: according to described network frequency, set up RRC connection; Set up RRC connects if failed on described network frequency, in described network frequency range, search target frequency, set up after target RRC connection, in described target RRC connection according to target frequency, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
Accordingly, the method for the present embodiment comprises the steps:
Step 310, circuit domain rollback when instruction being detected, record move terminal is at the LTE network of network frequency range and the network frequency that carry out registering before described circuit domain rollback.
After step 320, the circuit domain business of initiating by circuit domain rollback mode at mobile terminal finish, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network.
Step 330, judge whether the network type of current institute access network is LTE network: if not, execution step 340; Otherwise, execution step 350.
Step 340, according to described network frequency, set up RRC connect, execution step 360.
In the present embodiment, first mobile terminal is attempted setting up RRC according to described network frequency and is connected, and connects, if can successfully set up RRC in the RRC connection of setting up according to described network frequency, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize;
Connect if can not successfully set up RRC, in described network frequency range, obtain successively frequency and attempt setting up RRC connection, connect if RRC is set up in success on a frequency, using this frequency as target frequency.
Step 350, process ends.
Step 360, judge on described network frequency, whether successfully set up RRC connect: if not, execution step 370; Otherwise, execution step 380.
Step 370, in described network frequency range, search target frequency, after setting up target RRC and connect according to target frequency, in described target RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
Step 380, in the RRC connection of setting up according to described network frequency, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
After the embodiment of the present invention finishes by the circuit domain business of initiating by circuit domain rollback mode at mobile terminal, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network, in the time that the network type of current institute access network is not LTE network, initiatively initiate the initial attachment flow of Non-Access Stratum NAS, to realize the technological means that again accesses LTE network, solve prior art in the time that mobile terminal does not have autonomous FR function, after circuit domain rollback, again access the required time delay of LTE network very long, under some extreme cases, even cannot again access the technical problem of LTE network, realize no matter whether mobile terminal has autonomous FR function, after circuit domain rollback, can again access LTE network, improve LTE network of network cut-in quality.
The 4th embodiment
Fig. 4 is the flow chart of a kind of method that again accesses LTE network of fourth embodiment of the invention.The present embodiment is optimized as basis taking above-described embodiment, and in the present embodiment, the described network parameter of record preferably includes: mobile terminal is at the LTE network of network frequency range and the network frequency that carry out registering before described circuit domain rollback;
Preferably also comprise step: in the implementation of described circuit domain business, the change in location parameter of record move terminal;
Preferably by step according to the described network parameter of record, set up after RRC connection, in described RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network and be specifically optimized for to realize: if described change in location parameter meets preselected threshold condition, according to described network frequency, set up after a RRC connection, in a described RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize; Otherwise, in described network frequency range, search target frequency and set up after the 2nd RRC connection, in described the 2nd RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
Accordingly, the method for the present embodiment comprises the steps:
Step 410, circuit domain rollback when instruction being detected, record move terminal is at the LTE network of network frequency range and the network frequency that carry out registering before described circuit domain rollback.
Step 420, in the implementation of described circuit domain business, the change in location parameter of record move terminal.
In the present embodiment, the network parameter using when the follow-up RRC of foundation is connected is more pointed, mobile terminal in the implementation of described circuit domain business, the change in location parameter of record move terminal.
In the present embodiment, described change in location parameter can comprise following at least one: average translational speed, maximum translational speed and mobile distance.
Mobile terminal is according in described circuit domain business implementation, and the change in location parameter value of mobile terminal, finally determines which kind of network parameter to set up RRC with connects.
After step 430, the circuit domain business of initiating by circuit domain rollback mode at mobile terminal finish, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network.
Step 440, judge whether the network type of current institute access network is LTE network: if not, execution step 450; Otherwise, execution step 460.
Step 450, judge whether described change in location parameter meets preselected threshold condition: if so, perform step 470; Otherwise, execution step 480.
In the present embodiment, if when mobile terminal determines that according to change in location parameter mobile terminal does not have the change in location of highly significant while meeting preselected threshold condition (in other words above-mentioned), attempt setting up RRC with described network frequency and connect; Otherwise, attempt setting up RRC by described network frequency range and connect.
For example, can be using maximum translational speed as change in location parameter, described preselected threshold condition is set to: maximum translational speed is less than speed threshold value; Also can be using mobile distance as change in location parameter, described preselected threshold condition is set to: mobile distance is less than distance threshold value; Can also be using average translational speed as change in location parameter, described preselected threshold condition is set to: average translational speed is less than average speed threshold value etc., also can, using two in above-mentioned parameter or all as change in location parameter and corresponding preselected threshold condition etc. is set, this not limited.
Step 460, process ends.
Step 470, according to described network frequency, set up the one RRC connect after, in a described RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
Step 480, in described network frequency range, search target frequency set up the 2nd RRC connect after, in described the 2nd RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
After the embodiment of the present invention finishes by the circuit domain business of initiating by circuit domain rollback mode at mobile terminal, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network, in the time that the network type of current institute access network is not LTE network, initiatively initiate the initial attachment flow of Non-Access Stratum NAS, to realize the technological means that again accesses LTE network, solve prior art in the time that mobile terminal does not have autonomous FR function, after circuit domain rollback, again access the required time delay of LTE network very long, under some extreme cases, even cannot again access the technical problem of LTE network, realize no matter whether mobile terminal has autonomous FR function, after circuit domain rollback, can again access LTE network, improve LTE network of network cut-in quality.
On the basis of the various embodiments described above, described method can also comprise: if fail again to access LTE network, call the default network search configuration file prestoring, re-start web search.The benefit arranging is like this: after mobile terminal is by LTE web search initiatively, still cannot access under the extreme case of LTE network, for example, when user moves in the community without the LTE network coverage, ensure that mobile terminal can turn back in 2G or 3G network, ensure the scope of application of the embodiment of the present invention, improved the networking of mobile terminal and experienced.
The 5th embodiment
Figure 5 illustrates the structure chart of a kind of device that again accesses LTE network of fifth embodiment of the invention.As shown in Figure 5, described device comprises:
Current access network determining unit 51, after finishing for the circuit domain business of initiating by circuit domain rollback mode at mobile terminal, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network;
LTE network is access unit 52 again, in the time that the network type of current institute access network is not LTE network, initiatively initiates the initial attachment flow of Non-Access Stratum NAS, again accesses LTE network to realize.
After the embodiment of the present invention finishes by the circuit domain business of initiating by circuit domain rollback mode at mobile terminal, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network, in the time that the network type of current institute access network is not LTE network, initiatively initiate the initial attachment flow of Non-Access Stratum NAS, to realize the technological means that again accesses LTE network, solve prior art in the time that mobile terminal does not have autonomous FR function, after circuit domain rollback, again access the required time delay of LTE network very long, under some extreme cases, even cannot again access the technical problem of LTE network, realize no matter whether mobile terminal has autonomous FR function, after circuit domain rollback, can again access LTE network, improve LTE network of network cut-in quality.
On the basis of the various embodiments described above, the span of described tolerance limit time T specifically can comprise: t1<T<t2; Wherein, t1 is the theoretical time that the terminal with autonomous fast return function is returned to LTE network after the rollback of completing circuit territory; T2 is the theoretical time that the terminal without autonomous fast return function is returned to LTE network after the rollback of completing circuit territory.
On the basis of the various embodiments described above, described device can also comprise, network parameter determining unit, be used for: after the circuit domain business of initiating by circuit domain rollback mode at mobile terminal finishes, the tolerance limit time that interval is predetermined, before detecting the network type of the current institute of mobile terminal access network, in the time the instruction of circuit domain rollback being detected, record move terminal is in the LTE network of network parameter of carrying out registering before described circuit domain rollback;
Described LTE network again access unit specifically for: according to record described network parameter, set up radio resource control RRC connect after, in described RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
On the basis of the various embodiments described above, network parameter determining unit specifically can be for: record move terminal is at the LTE network of network frequency range and the network frequency that carry out registering before described circuit domain rollback;
Described LTE network again access unit further specifically for: according to described network frequency, set up RRC connect; Set up RRC connects if failed on described network frequency, in described network frequency range, search target frequency, set up after target RRC connection, in described target RRC connection according to target frequency, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
On the basis of the various embodiments described above, network parameter determining unit specifically can be for: record move terminal is at the LTE network of network frequency range and the network frequency that carry out registering before described circuit domain rollback;
Described device can also comprise, change in location reference record unit, for: in the implementation of described circuit domain business, the change in location parameter of record move terminal;
Described LTE network again access unit further specifically can be for: if described change in location parameter meets preselected threshold condition, according to described network frequency, set up after a RRC connection, in a described RRC connection, initiatively initiate NAS beginning attachment flow, again access LTE network to realize; Otherwise, in described network frequency range, search target frequency and set up after the 2nd RRC connection, in described the 2nd RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
On the basis of the various embodiments described above, described change in location parameter comprises following at least one: average translational speed, maximum translational speed and mobile distance.
On the basis of the various embodiments described above, described device can also comprise:
The whole network search unit, if again access LTE network for failing, calls the default network search configuration file prestoring, and re-starts web search.
The device that again accesses LTE network that the embodiment of the present invention provides can be used for carrying out the method that again accesses LTE network that any embodiment of the present invention provides, and possesses corresponding functional module, realizes identical beneficial effect.
Obviously, it will be understood by those skilled in the art that above-mentioned of the present invention each module or each step can be by server implementations as above.Alternatively, the embodiment of the present invention can realize by the executable program of computer installation, thereby they can be stored in storage device and be carried out by processor, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.; Or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module realize.Like this, the present invention is not restricted to the combination of any specific hardware and software.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, to those skilled in the art, the present invention can have various changes and variation.All any amendments of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included within spirit of the present invention and principle.
Claims (12)
1. a method that again accesses Long Term Evolution LTE network, is characterized in that, comprising:
After the circuit domain business of initiating by circuit domain rollback mode at mobile terminal finishes, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network;
In the time that the network type of current institute access network is not LTE network, initiatively initiate the initial attachment flow of Non-Access Stratum NAS, again access LTE network to realize.
2. method according to claim 1, is characterized in that, the span of described tolerance limit time T specifically comprises: t1<T<t2;
Wherein, t1 is the theoretical time that the terminal with autonomous fast return function is returned to LTE network after the rollback of completing circuit territory; T2 is the theoretical time that the terminal without autonomous fast return function is returned to LTE network after the rollback of completing circuit territory.
3. method according to claim 1, is characterized in that, after the circuit domain business of initiating by circuit domain rollback mode at mobile terminal finishes, the tolerance limit time that interval is predetermined, before detecting the network type of the current institute of mobile terminal access network, also comprises:
In the time the instruction of circuit domain rollback being detected, record move terminal is in the LTE network of network parameter of carrying out registering before described circuit domain rollback;
Initiatively initiate the initial attachment flow of NAS, again access LTE network and specifically comprise to realize:
According to the described network parameter of record, set up after radio resource control RRC connection, in described RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
4. method according to claim 3, is characterized in that, the described network parameter of record specifically comprises: mobile terminal is at the LTE network of network frequency range and the network frequency that carry out registering before described circuit domain rollback;
According to the described network parameter of record, after setting up RRC and connecting, in described RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network and specifically comprise to realize:
According to described network frequency, set up RRC and connect;
Set up RRC connects if failed on described network frequency, in described network frequency range, search target frequency, set up after target RRC connection, in described target RRC connection according to target frequency, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
5. method according to claim 3, is characterized in that: the described network parameter of record specifically comprises: the LTE network of network frequency range and the network frequency that carry out the front registration of described circuit domain rollback;
Described method also comprises:
In the implementation of described circuit domain business, the change in location parameter of record move terminal;
According to the described network parameter of record, after setting up RRC and connecting, in described RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network and specifically comprise to realize:
If described change in location parameter meets preselected threshold condition, according to described network frequency, set up after a RRC connection, in a described RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize; Otherwise, in described network frequency range, search target frequency and set up after the 2nd RRC connection, in described the 2nd RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
6. method according to claim 5, is characterized in that, described change in location parameter comprises following at least one:
Average translational speed, maximum translational speed and mobile distance.
7. according to the method described in claim 1-6 any one, it is characterized in that, also comprise:
If fail again to access LTE network, call the default network search configuration file prestoring, re-start web search.
8. a device that again accesses Long Term Evolution LTE network, is characterized in that, comprising:
Current access network determining unit, after finishing for the circuit domain business of initiating by circuit domain rollback mode at mobile terminal, the tolerance limit time that interval is predetermined, the network type of the detection current institute of mobile terminal access network;
LTE network access unit again, in the time that the network type of current institute access network is not LTE network, initiatively initiates the initial attachment flow of Non-Access Stratum NAS, again accesses LTE network to realize.
9. device according to claim 8, is characterized in that, the span of described tolerance limit time T specifically comprises: t1<T<t2;
Wherein, t1 is the theoretical time that the terminal with autonomous fast return function is returned to LTE network after the rollback of completing circuit territory; T2 is the theoretical time that the terminal without autonomous fast return function is returned to LTE network after the rollback of completing circuit territory.
10. device according to claim 8, is characterized in that, also comprise, and network parameter determining unit, for:
After the circuit domain business of initiating by circuit domain rollback mode at mobile terminal finishes, the tolerance limit time that interval is predetermined, before detecting the network type of the current institute of mobile terminal access network, in the time the instruction of circuit domain rollback being detected, record move terminal is in the LTE network of network parameter of carrying out registering before described circuit domain rollback;
Described LTE network again access unit specifically for:
According to the described network parameter of record, set up after radio resource control RRC connection, in described RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
11. devices according to claim 10, is characterized in that, network parameter determining unit specifically for: record move terminal is at the LTE network of network frequency range and the network frequency that carry out registering before described circuit domain rollback;
Described LTE network again access unit further specifically for:
According to described network frequency, set up RRC and connect;
Set up RRC connects if failed on described network frequency, in described network frequency range, search target frequency, set up after target RRC connection, in described target RRC connection according to target frequency, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
12. devices according to claim 10, is characterized in that: network parameter determining unit specifically for: record move terminal is at the LTE network of network frequency range and the network frequency that carry out registering before described circuit domain rollback;
Described device also comprises, change in location reference record unit, for:
In the implementation of described circuit domain business, the change in location parameter of record move terminal;
Described LTE network again access unit further specifically for:
If described change in location parameter meets preselected threshold condition, according to described network frequency, set up after a RRC connection, in a described RRC connection, initiatively initiate NAS beginning attachment flow, again access LTE network to realize; Otherwise, in described network frequency range, search target frequency and set up after the 2nd RRC connection, in described the 2nd RRC connection, initiatively initiate the initial attachment flow of NAS, again access LTE network to realize.
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