CN105338578B

CN105338578B - A kind of terminal independently returns to the method, apparatus and terminal of network

Info

Publication number: CN105338578B
Application number: CN201410397652.3A
Authority: CN
Inventors: 曹蕾; 阮航; 董文佳; 江海涛
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2014-08-13
Filing date: 2014-08-13
Publication date: 2018-11-16
Anticipated expiration: 2034-08-13
Also published as: CN105338578A

Abstract

The invention discloses method, apparatus and terminal that a kind of terminal independently returns to network to guarantee network service quality to improve the network service performance after terminal returns to network.The terminal stores frequency point list corresponding with the PLMN for every PLMN；The method, including：When carrying out CSFB voice communication, judge whether the terminal meets high-speed mobile condition；If it is, the priority of each frequency point where before carrying out CSFB in the corresponding frequency point list of PLMN is determined according to high-speed mobile scene frequency point ordering strategy, if not, according to non-high-speed mobile context frequency point ordering strategy to the priority of each frequency point before carrying out CSFB in the corresponding frequency point list of place PLMN；After the CSFB voice communication, it is resident according to the priority orders cell that successively Grouping scan and selection meet condition of each frequency point before carrying out CSFB in the corresponding frequency point list of place PLMN.

Description

A kind of terminal independently returns to the method, apparatus and terminal of network

Technical field

The present invention relates to mobile communication technology field more particularly to a kind of terminal independently return network method, apparatus and Terminal.

Background technique

LTE (Long Term Evolution, long term evolution) is drilled as 3G (3rd Generation, the third generation) is subsequent Into technology, with unique technologies advantages such as its high data rate, low time delay, flexible band width configurations, it is considered to be the next generation is mobile The evolution tendency of communication.But LTE network is based on full IP (Internet Protocol, Internet protocol) framework, it can only The speech industry of VoIP (Voice over Internet Protocol is based on Internet protocol) based on packet domain is provided Business；It is process gradually in view of LTE network continuously covers, for the continuity for ensuring voice service, it is necessary to LTE network be supported to arrive The speech switching capability of 2G/3G network, this requires networks and terminal must support SRVCC (Single Radio Voice Call Continuity, single radio frequency voice call continuity) function.As generally acknowledged LTE target speech solution, Still it will take time for the end-to-end industry maturation of VoLTE+SRVCC (Voice over LTE, the speech based on LTE) scheme.

CSFB is mainly used at present based on this to meet the voice traffic needs that network disposes initial stage LTE network user (Circuit Switch Fall Back, circuit domain dropping) or Multi-mode dual-standby terminal are as LTE network transition speech solution party Case.The basic principle of CSFB scheme is：LTE network is preferentially resident in terminal booting, and when there is voice traffic needs, network can pass through It redirects or terminal is fallen back to 3G or 2G network and provides voice service by handover mechanism.After voice service, terminal can be with LTE network is returned from 3G or 2G network based on number of mechanisms, is specifically included：

(1) FR of network-control (Fast Return is quickly returned)：When CSFB voice service terminates in 2G or 3G network When, RRC Connection that the Channel Release message or 3G network that terminal is issued according to 2G network issue The redirection LTE frequency point information carried in Release message carries out frequency sweep；If it is same to carry out downlink it was found that LTE frequency point can be used Step, reading system broadcast message initiate RRC Connection Request and request resident, realization if meeting resident thresholding Terminal quickly returns to LTE network.But the program has upgrading requirement to the base station equipment of existing 2G and 3G network, is related to The biggish network rebuilding and Optimal Maintenance investment, and performance challenges are faced under subnetwork covering scene.

(2) FR of terminal control：When CSFB voice service is at the end of 2G or 3G network, if what 2G network issued Any redirection is not carried in the RRC Connection Release message that Channel Release message or 3G network issue Subdistrict frequency point (including 2G, 3G, 4G), then the LTE frequency point information that terminal is prestored according to itself carry out frequency sweep；If it was found that LTE can be used Frequency point then carries out down-going synchronous, reads system broadcast message, if meeting resident thresholding, initiates RRC Connection Request request is resident, realizes that terminal quickly returns to LTE network.The program shows net base station equipment without upgrading 2G and 3G, only needs LTE frequency point information is prestored in terminal, carrier network investment for trnasforming urban land and Optimal Maintenance cost can be greatlyd save, realizes that CSFB is quick Deployment.

(3) cell reselection：When CSFB voice service is at the end of 2G or 3G network, if network side does not dispose FR and terminal not The FR of terminal control is supported, but 2G or 3G network are configured with the adjacent area LTE, then terminal can pass through cell reselection under Idle state Mechanism returns to LTE network.The program requires 2G or 3G network to configure the adjacent area LTE, is related to the biggish network rebuilding and Optimal Maintenance Investment, and return time delay is too long, user experience is bad.

(4) other mechanism：When CSFB voice service is at the end of 2G or 3G network, if network side does not dispose FR and terminal not The FR for supporting terminal control, then terminal can pass through the redirection with isosystem measurement or switching under data service connected state Mechanism returns to LTE network from 3G, or returns to LTE network from 2G by NC0 (gravity treatment based on terminal) mechanism.The program requires 2G Or 3G network is supported to LTE network connected state Interoperability Mechanism, and the biggish network rebuilding and Optimal Maintenance investment, and user are related to It is slightly poor to experience.

Which kind of deployment mechanisms is specifically used, different operators can be different in conjunction with itself strategy.Comprehensively consider user No matter experience and input-output ratio, the FR (i.e. terminal independently returns to scheme) of terminal control are meeting operator's local disposition demand It is all a pretty good selection with international roaming experience aspect is promoted.

Currently, terminal independently returns to scheme uses two class modes when realizing substantially：One kind is the LTE prestored according to terminal Frequency point priority orders, the frequency sweep since the frequency point of highest priority are no longer attempt to other frequencies if finding the cell that can be resident Point；If not finding that frequency point can be resident, then the frequency point of time high priority is scanned, and so on.Another kind of is the institute prestored to terminal There is LTE frequency point to carry out based on RSSI (Received Signal Strength Indication, received signal strength indicator) Scanning, according to RSSI by weak sequence, the preferential strongest LTE frequency point trial of selection signal is resident, if can be resident, no longer tastes by force Try other frequency points；If can not be resident, the strong frequency point of reselection signal time is attempted to be resident, and so on.Wherein, for first kind side Frequency point where the LTE cell being resident before terminal the last time CSFB is usually set to by the LTE frequency point Sort Priority in formula Highest priority, and its adjacent cell LTE frequency point is set to time high priority.

However, faced during real network deployment complicated this system and different interoperability of system parameter configuration scene and Strategy, especially be more than 200km/h high-speed mobile scene (such as：High-speed rail) under when, network coverage strategy and parameter are matched Set scheme and movement speed lower than 200km/h middle low speed mobile context (such as：Typical Urban environment) different or even phase It is mutually relatively more independent, but there is the scene that two kinds of network coverage areas overlap again, wherein without mutually under most of overlapped coverage scene Operative configuration relationship.This just needs terminal that can be adapted to different network coverage scenes more flexiblely, and adaptation network disposes plan Slightly, while good user experience is ensured that.

Existing two Terminal Type independently returns to implementation equal existing defects when in face of above-mentioned complex network covering scene, It is unable to ensure user and obtains good user experience under various network environments, and meet operator and terminal is independently returned The expection of deployment of LTE network strategy, it is specific as follows：In first kind mode, user may insure under static or middle low speed scene LTE network is returned with most fast speed, but can not be total under high-speed mobile scene, outdoor to indoor or interior to outdoor scene It is to ensure that user can return to the LTE cell of location LTE signal best cell or network side expectation terminal return such as in needle To under high-speed mobile scene, in order to improve network service quality, operator would generally dispose high speed private networks along high-speed rail It is covered, according to the prior art, not can guarantee terminal access high speed private networks, to not can guarantee the network service of terminal Performance reduces network service quality, equally, in the second class mode, it can be ensured that it is preferably small that terminal returns to location LTE signal Area, but the best cell of the LTE signal is also not necessarily the best cell of service performance for terminal.

Summary of the invention

The embodiment of the present invention provides the method, apparatus and terminal that a kind of terminal independently returns to network, returns to improve terminal Network service performance after returning network guarantees network service quality.

The embodiment of the present invention provides a kind of method that terminal independently returns to network, and the terminal is moved for each public land Dynamic network PLMN stores frequency point list corresponding with the PLMN；

The method, including：

When carrying out circuit domain dropping CSFB voice communication, judge whether the terminal meets high-speed mobile condition；

The CSFB corresponding frequency point of place PLMN before is carried out if so, determining according to high-speed mobile scene frequency point ordering strategy The priority of each frequency point in list, if not, according to non-high-speed mobile context frequency point ordering strategy to institute before progress CSFB The priority of each frequency point in the corresponding frequency point list of PLMN；

After the CSFB voice communication, according to each in the corresponding frequency point list of place PLMN before carrying out CSFB The priority orders of the frequency point cell that successively Grouping scan and selection meet condition is resident.

It is determined according to high-speed mobile scene frequency point ordering strategy where before carrying out CSFB in the corresponding frequency point list of PLMN Each frequency point priority, including：

It determines in the corresponding frequency point list of PLMN where before carrying out CSFB, the CSFB voice communication foregoing description terminal Configuration high-speed is identified as the adjacent area frequency point of genuine adjacent area and is in the adjacent area of the subdistrict frequency point of persistent district and the persistent district First priority frequency point；

Configuration high-speed in the corresponding frequency point list of place PLMN, in the adjacent area of the persistent district before determining progress CSFB Mark is not the second priority frequency point for the adjacent area frequency point of genuine adjacent area；

It determines in the corresponding frequency point list of PLMN where before carrying out CSFB and removes the first priority frequency point and the second priority Other frequency points other than frequency point are third priority frequency point.

The high-speed mobile condition includes：The moving velocity of terminal is more than or equal to pre-set velocity threshold value and carries out CSFB language The last resident cell configuration high-speed is identified as very before sound call；And

It is successively grouped according to the priority orders of each frequency point before carrying out CSFB in the corresponding frequency point list of place PLMN It scans and selects the cell for meeting condition resident, including：

According to the priority determined by successively selecting the frequency point an of priority to carry out frequency point scanning to weak sequence by force； And

According to received signal strength indicator RSSI by weak sequence, frequency point carries out down-going synchronous one by one by force；

Judge down-going synchronous success and meet in the cell for being resident thresholding to be identified as at a high speed really with the presence or absence of at least one Cell；

If it is present according to Reference Signal Received Power RSRP by successively selecting a high speed to identify to weak sequence by force It is attempted for genuine cell resident；

If there is no and currently the priority that selects is lowest priority, then from all cells for meeting resident thresholding According to Reference Signal Received Power RSRP by successively selecting a cell to attempt to be resident to weak sequence by force；

If there is no and currently the priority that selects is not lowest priority, then select each frequency point of next priority into Row scanning.

It further include each frequency point corresponding Physical Cell Identifier PCI or cell ID CI in the frequency point list；And

It judges whether there is at least one after down-going synchronous success for the first priority frequency point and is identified as at a high speed Before genuine cell, further include：

According to the corresponding PCI or CI of the first priority frequency point in the frequency point list, judge that down-going synchronous is successfully small It whether there is the corresponding cell of the first priority frequency point in area；

If there is and meet the resident thresholding of corresponding cell, then select corresponding cell resident；

If there is and be unsatisfactory for corresponding cell resident thresholding or there is no the first priority frequency point it is corresponding small Area then executes and judges down-going synchronous success and meet the step for being identified as genuine cell in the cell for being resident thresholding with the presence or absence of high speed Suddenly.

The corresponding frequency point list of PLMN where before carrying out CSFB is determined according to non-high-speed mobile context frequency point ordering strategy In each frequency point priority, including：

It determines in the corresponding frequency point list of PLMN where before carrying out CSFB, the CSFB voice communication foregoing description terminal The subdistrict frequency point of persistent district is the first priority frequency point；

It determines in the corresponding frequency point list of current PLMN, the neighbour of CSFB voice communication foregoing description terminal persistent district The adjacent area frequency point in area is the second priority frequency point；

Determine the frequency in the corresponding frequency point list of current PLMN in addition to the first priority frequency point and the second priority frequency point Point is third priority frequency point.

If the moving velocity of terminal is more than or equal to pre-set velocity threshold value or carries out nearest one before CSFB voice communication When secondary resident cell configuration high-speed is identified as true, according to each frequency before carrying out CSFB in the corresponding frequency point list of place PLMN The priority orders of the point cell that successively Grouping scan and selection meet condition is resident, including：

According to the priority determined by successively selecting the frequency point sets an of priority to carry out frequency point to weak sequence by force Scanning；And

If the last time stays before the moving velocity of terminal is no more than pre-set velocity threshold value and carries out CSFB voice communication When the cell configuration high-speed mark stayed is not true, according to each frequency point before carrying out CSFB in the corresponding frequency point list of place PLMN Priority orders successively Grouping scan and select the cell for meeting condition resident, including：

According to Reference Signal Received Power RSRP by successively selecting a cell to attempt to be resident to weak sequence by force；

If being resident priority that is unsuccessful and currently selecting is not lowest priority, each frequency of next priority is selected Point is scanned.

The embodiment of the present invention provides the device that a kind of terminal independently returns to network, including：

Storage unit, for storing frequency point list corresponding with the PLMN for each public land mobile network PLMN；

Judging unit, for when carrying out circuit domain dropping CSFB voice communication, judging whether the terminal meets high speed Mobile condition；

Determination unit is when being, to sort according to high-speed mobile scene frequency point for the judging result in the judging unit Strategy determines the priority for carrying out each frequency point in the CSFB corresponding frequency point list of place PLMN before；In the judging unit When judging result is no, according to non-high-speed mobile context frequency point ordering strategy to PLMN corresponding frequency point in place before carrying out CSFB The priority of each frequency point in list；

Processing unit, for after the CSFB voice communication, place PLMN to be corresponding before according to CSFB is carried out The priority orders of each frequency point in the frequency point list cell that successively Grouping scan and selection meet condition is resident.

The determination unit, for PLMN pairs where when meeting the high-speed mobile condition, determining before carrying out CSFB In the frequency point list answered, the subdistrict frequency point of CSFB voice communication foregoing description terminal persistent district and the persistent district Adjacent area in configuration high-speed be identified as genuine adjacent area adjacent area frequency point be the first priority frequency point；Where determining before carrying out CSFB Configuration high-speed mark is not in the corresponding frequency point list of PLMN, in the adjacent area of the persistent district for the adjacent area frequency point of genuine adjacent area Second priority frequency point；It determines in the corresponding frequency point list of PLMN where before carrying out CSFB and removes the first priority frequency point and second Other frequency points other than priority frequency point are third priority frequency point.

The processing unit, including：

First frequency point scanning subelement, for according to the priority determined by by force to weak sequence successively select one it is excellent The frequency point of first grade carries out frequency point scanning；And the first judgment sub-unit judging result be priority that is no and currently selecting not When being lowest priority, each frequency point of next priority is selected to be scanned；

First down-going synchronous subelement, for according to received signal strength indicator RSSI by by force to weak sequence frequency point one by one Carry out down-going synchronous；

First judgment sub-unit whether there is for judging down-going synchronous success and meeting in the cell for being resident thresholding At least one is identified as at a high speed genuine cell；

First resident subelement is when being, according to reference signal for the judging result in first judgment sub-unit Power RSRP is received to attempt to be resident by successively selecting a high speed to be identified as genuine cell to weak sequence by force；And in institute It is minimum preferential that the judging result for stating the first judgment sub-unit, which is the priority that the no and described frequency point scanning subelement currently selects, Grade then meets in the cells for being resident thresholding according to Reference Signal Received Power RSRP from all by successively selecting to weak sequence by force One cell is attempted resident.

The processing unit further includes the second judgment sub-unit, wherein：

Second judgment sub-unit, for be directed to the first priority frequency point, the down-going synchronous subelement down-going synchronous at After function and first judgment sub-unit judges whether there is at least one and is identified as at a high speed before genuine cell, according to The corresponding PCI or CI of first priority frequency point in the frequency point list judges to whether there is in the successful cell of down-going synchronous The corresponding cell of the first priority frequency point；

The first resident subelement is to be and meet corresponding for the judging result in second judgment sub-unit The resident thresholding of cell then selects corresponding cell resident；

First judgment sub-unit is to be and be unsatisfactory for corresponding to for the judging result in second judgment sub-unit Cell resident thresholding or second judgment sub-unit judging result be it is no when, execution judge down-going synchronous successfully and Meet the step of being identified as genuine cell with the presence or absence of high speed in the cell of resident thresholding.

The determination unit, for PLMN where when being unsatisfactory for the high-speed mobile condition, determining before carrying out CSFB In corresponding frequency point list, the subdistrict frequency point of CSFB voice communication foregoing description terminal persistent district be the first priority frequency Point；It determines in the corresponding frequency point list of current PLMN, the adjacent area of CSFB voice communication foregoing description terminal persistent district Adjacent area frequency point is the second priority frequency point；It determines in the corresponding frequency point list of current PLMN except the first priority frequency point and second excellent Frequency point other than first grade frequency point is third priority frequency point.

The processing unit, including：

Second frequency point scanning subelement, if being more than or equal to pre-set velocity threshold value or progress for the moving velocity of terminal When the last resident cell configuration high-speed is identified as true before CSFB voice communication, according to the priority determined by by force to Weak sequence successively selects the frequency point sets an of priority to carry out frequency point scanning；And the judgement knot in third judgment sub-unit Fruit is that priority that is no and currently selecting is not lowest priority, then each frequency point of next priority is selected to be scanned；

Second down-going synchronous subelement, according to received signal strength indicator RSSI by frequency point carries out one by one to weak sequence by force Down-going synchronous；

Third judgment sub-unit, for judging down-going synchronous success and meeting in the cell for being resident thresholding with the presence or absence of at least One high speed is identified as genuine cell；

Second resident subelement is when being, according to reference signal for the judging result in the third judgment sub-unit Power RSRP is received to attempt to be resident by successively selecting a high speed to be identified as genuine cell to weak sequence by force；Sentence in the third It is lowest priority that the judging result of disconnected subelement, which is priority that is no and currently selecting, from all cells for meeting resident thresholding According to Reference Signal Received Power RSRP successively to select cell to attempt to weak sequence by by force resident.

The processing unit, including：

Third frequency point scanning subelement, if being no more than pre-set velocity threshold value for the moving velocity of terminal and carrying out CSFB When the last resident cell configuration high-speed mark is not true before voice communication, according to the priority determined by by force to weak Sequence successively select a priority frequency point sets carry out frequency point scanning；And if third be resident subelement it is resident not at The function and priority currently selected is not lowest priority, then select each frequency point of next priority to be scanned；

Third down-going synchronous subelement, for according to received signal strength indicator RSSI by by force to weak sequence frequency point one by one Carry out down-going synchronous；

Third is resident subelement, for according to Reference Signal Received Power RSRP by successively selecting one to weak sequence by force Cell is attempted resident.

The embodiment of the present invention provides a kind of terminal, and the device of network is independently returned including above-mentioned terminal.

Terminal provided in an embodiment of the present invention independently returns to the method, apparatus and terminal of network, and terminal is directed to every PLMN Frequency point list corresponding with the PLMN is stored, when terminal carries out CSFB voice communication, first determines whether terminal meets high speed Mobile condition；PLMN where before determining progress CSFB according to high-speed mobile scene frequency point ordering strategy if meeting is corresponding The priority of each frequency point in frequency point list, if conditions are not met, then according to non-high-speed mobile context frequency point ordering strategy to progress The priority of each frequency point in the corresponding frequency point list of PLMN where before CSFB, after CSFB voice communication terminates, according to The sequence of priority is scanned each frequency point before carrying out CSFB in the corresponding frequency point list of place PLMN and selects to meet The cell of condition is resident, due to distinguishing to each frequency point according to priority, and in high-speed mobile scene and non-high-speed moving field Scape determines the priority of each frequency point according to different priority policies, in this way, terminal is according to each after CSFB voice call The priority of frequency point is scanned and selects the cell for meeting condition resident, so that selecting resident cell is more in line with terminal Current moving state so as to increase network service performance, and guarantees network service quality.

Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by written explanation Specifically noted structure is achieved and obtained in book, claims and attached drawing.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings：

Fig. 1 is in the embodiment of the present invention, and terminal independently returns to the implementation process diagram of the method for network；

Fig. 2 is in the embodiment of the present invention, and under high-speed mobile scene, the implementing procedure that terminal independently returns to the method for network shows It is intended to；

Fig. 3 is in the embodiment of the present invention, and under non-high-speed mobile context, the first terminal independently returns to the reality of the method for network Apply flow diagram；

Fig. 4 is in the embodiment of the present invention, and under non-high-speed mobile context, second of terminal independently returns to the reality of the method for network Apply flow diagram；

Fig. 5 is in the embodiment of the present invention, and terminal independently returns to the structural schematic diagram of the device of network.

Specific embodiment

In order to improve the network service performance after terminal independently returns to network, guarantee network service quality, the present invention is implemented Example provides the method, apparatus and terminal that a kind of terminal independently returns to network.

The method that terminal provided in an embodiment of the present invention independently returns to network is suitable for terminal and resides in LTE and its evolution net In network, when having in voice service demand, network is by redirection or terminal is fallen back to 2G to handover mechanism or 3G network provides words Sound business, to voice service after and the RRC that issues of the Channel Release that issues of 2G network or 3G network When not carrying redirection subdistrict frequency point information in Connection Release, terminal returns to the application of LTE and its evolvement network Scene, it is following for ease of description to be illustrated by taking LTE network as an example.

Below in conjunction with Figure of description, preferred embodiment of the present invention will be described, it should be understood that described herein Preferred embodiment only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention, and in the absence of conflict, this hair The feature in embodiment and embodiment in bright can be combined with each other.

In the embodiment of the present invention, return again to after CSFB voice communication to solve terminal under high-speed mobile scene Can not be accessed when network with the matched cell of terminal current state, cause network service performance to decline, not can guarantee network service The problem of quality, classifies according to PLMN (Public Land Mobile Network, public land mobile network) in the terminal Preset corresponding LTE network frequency point list, i.e., (i=1,2,3 ... T, T can be matched default preset whole world i in the terminal Set) the LTE deployment frequency point information of a mainstream carrier, and mapping relations are formed with the PLMN of operator, every PLMN can be right Answer multiple and different LTE frequency points.

Preferably, if be resident LTE network at a certain PLMN, finding the PLMN of itself storage after terminal booting When corresponding LTE frequency point list does not include currently resident LTE frequency point, currently resident LTE frequency point is added to this PLMN pairs In the LTE frequency point list answered.

It in the embodiment of the present invention, is under high-speed moving state and non-high-speed moving condition for terminal, it is logical to terminate CSFB LTE network is returned after words to be described.

It should be noted that in order to improve under high speed moving state of terminal (such as high-speed rail) promoted terminal random access at Power and network service quality, it will usually high-speed dedicated LTE network is disposed along high-speed rail, high-speed dedicated LTE network issues The Highspeedflag carried in SIB2 (system information block 2, System Information Block 2) is set to True, table Bright terminal has accessed high-speed dedicated LTE network.

In order to achieve the object of the present invention, so that terminal returned under different movement speeds it is matched with present terminal state In the embodiment of the present invention, different frequency point sequences can be arranged in LTE network for high-speed mobile scene and non-high-speed mobile context Strategy.

Specifically, under high-speed mobile scene, i.e., it, can be according to following high-speed mobile when terminal meets high-speed mobile condition Each frequency in the corresponding LTE frequency point list of PLMN where scene frequency point ordering strategy determines terminal before carrying out CSFB voice communication The priority of point：It determines in the corresponding frequency point list of PLMN where before carrying out CSFB, terminal is resident before CSFB voice communication It is first that configuration high-speed, which is identified as the adjacent area frequency point of genuine adjacent area, in the adjacent area of the subdistrict frequency point of cell and the persistent district Priority frequency point；Configuration high-speed in the corresponding frequency point list of place PLMN, in the adjacent area of persistent district before determining progress CSFB Mark is not the second priority frequency point for the adjacent area frequency point of genuine adjacent area；Determine the corresponding frequency point of PLMN where before carrying out CSFB Other frequency points in list in addition to the first priority frequency point and the second priority frequency point are third priority frequency point.I.e. by terminal The LTE of Highspeedflag=True is configured with frequently in be resident LTE cell and its adjacent cell list before the last CSFB In point the first priority frequency point list of deposit, the LTE frequency point that Highspeedflag=True is not configured in adjacent cell list is deposited Enter in the second priority frequency point list；Other frequency points deposit third in LTE frequency point list in addition to above-mentioned frequency point is preferential In grade frequency point list.When it is implemented, if before terminal the last time CSFB in be resident LTE cell and its LTE adjacent cell There is the frequency point with Highspeedflag=True mark, then by the resident LTE frequency point of institute before terminal the last time CSFB It is set to highest priority.

Under non-high-speed mobile context, can be determined according to following non-high-speed mobile context frequency point ordering strategy terminal into The priority of each frequency point in the corresponding LTE frequency point list of PLMN where before row CSFB voice communication：It determines before carrying out CSFB The subdistrict frequency point of terminal persistent district is the first priority frequency in the corresponding frequency point list of place PLMN, before CSFB voice communication Point；It determines in the corresponding frequency point list of current PLMN, the adjacent area of the adjacent area of CSFB voice communication foregoing description terminal persistent district Frequency point is the second priority frequency point；It determines in the corresponding frequency point list of current PLMN except the first priority frequency point and the second priority Frequency point other than frequency point is third priority frequency point.Wherein, for the second priority frequency point, if the observing and controlling that network side issues disappears The frequency point of measurement result carry in breath or existing has higher priority relative to other frequency points, i.e., for the second priority Frequency point can be according to RSSI (if any) by being ranked up to weak sequence by force, and has the frequency point ratio of RSSI information without RSSI The frequency point of information priority with higher.The frequency point of the be resident LTE cell of terminal before the last CSFB is placed on highest Priority, and the adjacent cell LTE frequency point of the be resident LTE cell of terminal before the last CSFB is placed on time high priority, remove this Except other LTE frequency points be placed on lowest priority.For the adjacent cell LTE frequency point list in secondary high priority, wherein existing The LTE frequency point of measurement result carry in the observing and controlling message that network issues or existing need to be placed in slightly higher priority.

Preferably, can determine in accordance with the following methods whether terminal meets high-speed mobile condition in the embodiment of the present invention： Terminal according to its last time carry out CSFB voice communication before be resident LTE cell SIB2 in HighSpeedflag be No to be set to true, i.e. whether HighSpeedflag=True and moving velocity of terminal are more than that pre-set velocity threshold value (such as can be set It is set to 200km/h) judged, if meeting above-mentioned two condition, determine that terminal is in high-speed mobile scene and otherwise sentences Determine terminal and is in non-high-speed mobile context.

It should be noted that in the embodiment of the present invention, in order to after terminal terminates CSFB voice communication according to terminal Moving condition selects suitable frequency point resident, needs to judge whether terminal is in high-speed mobile shape when terminal carries out CSFB State, and determine according to judging result the priority of the corresponding each LTE frequency point of corresponding PLMN.Based on this, as shown in Figure 1, for this The terminal that inventive embodiments provide independently returns to the implementation process diagram of the method for network, may comprise steps of：

S11, when carrying out CSFB voice communication, judge whether terminal meets high-speed mobile condition, if so, execute step S12, if not, executing step S13；

S12, determine that PLMN corresponding frequency point in place arranges progress CSFB before according to high-speed mobile scene frequency point ordering strategy The priority of each frequency point in table, and execute step S14；

S13, PLMN corresponding frequency point in place before carrying out CSFB is arranged according to non-high-speed mobile context frequency point ordering strategy The priority of each frequency point in table.

S14, after CSFB voice communication, according to each in the corresponding frequency point list of PLMN where before carrying out CSFB The priority orders of the frequency point cell that successively Grouping scan and selection meet condition is resident.

Terminal is introduced under high-speed mobile scene and non-high-speed mobile context individually below after CSFB voice communication, It successively Grouping scan and is selected according to the priority orders of each frequency point in the corresponding frequency point list of PLMN where before carrying out CSFB Select the resident implementing procedure of the cell of the condition of satisfaction.

When it is implemented, can be held according to the following steps in step S14 for the terminal for meeting high-speed mobile condition Row：

Step 1: terminal according to the priority determined by by force to weak sequence successively select the frequency point of a priority into Line frequency spot scan.

When it is implemented, terminal is according to the excellent of each frequency point determined in LTE frequency point list according to High-speed Circumstance ordering strategy It is preferential that the first priority frequency point is selected to be scanned after first grade, if not finding cell in the frequency point of the first priority Success is resident, then scans the second priority, and so on.

Step 2: terminal is according to RSSI (received signal strength indicator) by weak sequence, frequency point progress downlink is same one by one by force Step.

When it is implemented, terminal is directed to the frequency point of each priority, according to RSSI by once selecting one to weak sequence by force A frequency point carries out down-going synchronous, firstly, the highest frequency point of terminal selection RSSI carries out down-going synchronous, and from down-going synchronous success and In the cell of the resident condition of satisfaction, preferential selection high speed is identified as genuine cell and is resident, and then selects RSSI times if it is not found, High frequency point carries out down-going synchronous, and so on, it is resident successfully if do not found yet after all frequency points operation of the priority Cell, then select the frequency point of next priority to be scanned, and execute above-mentioned process, until find and be resident successful cell, If not finding, from the success of all down-going synchronous and meet all cells (including each priority of resident condition The success of each frequency point down-going synchronous and meet all cells of resident condition) according to RSRP by successively being selected to weak sequence by force One cell is resident, until being resident successfully.

Step 3: judging down-going synchronous success and meeting in the cell for being resident thresholding to identify with the presence or absence of at least one high speed Otherwise, step 5 is executed if so, executing step 4 for genuine cell；

Step 4: according to RSRP (Reference Signal Received Power) by successively selecting a high speed to be identified as to weak sequence by force Genuine cell is attempted resident；

Step 5: if the priority currently selected is lowest priority, from all cells for meeting resident thresholding According to Reference Signal Received Power RSRP by successively selecting a cell to attempt to be resident to weak sequence by force；If currently selected Priority is not lowest priority, then returns to step one.

When it is implemented, terminal will select each frequency point of next priority to be scanned.

For the mobile terminal of non-high-speed, pre-set velocity threshold value is more than or equal to for movement speed or carries out CSFB voice The last resident cell configuration high-speed is identified as genuine terminal before call, in step S14, can hold according to the following steps Row：

Step 1: terminal is according to the priority determined by successively selecting the frequency point collection an of priority to weak sequence by force It closes and carries out frequency point scanning.

For the mobile terminal of non-high-speed, pre-set velocity threshold value is no more than for movement speed and carries out CSFB voice communication Before the last resident cell configuration high-speed mark is not genuine terminal, in step S14, can be held according to the following steps Row：

Step 1: according to RSSI by weak sequence, frequency point carries out down-going synchronous one by one by force；

Step 2: according to Reference Signal Received Power RSRP by successively selecting a cell trial to stay to weak sequence by force It stays；

Step 3: being selected next preferential if being resident priority that is unsuccessful and currently selecting is not lowest priority Each frequency point of grade is scanned.

Embodiment in order to better understand the present invention, below in conjunction with Figure of description to the specific implementation stream under various scenes Journey is illustrated.

As shown in Fig. 2, terminal independently returns to the implementation process diagram of the method for network under high-speed mobile scene, packet Include following steps：

S21, terminal are according to the priority determined by successively selecting the frequency point an of priority to carry out to weak sequence by force Frequency point scanning.

When it is implemented, terminal determines the priority of each frequency point in LTE frequency point list according to High-speed Circumstance ordering strategy Later, it is successively grouped and is scanned since the first priority frequency point.I.e. terminal is preferentially to the frequency point in the first priority frequency point Carry out the scanning based on RSSI.

S22, terminal are according to RSSI by carrying out down-going synchronous to weak one frequency point of sequential selection by force.

When it is implemented, according to the scanning result of step S21, to meet terminal preset RSSI thresholding (when it is implemented, RSSI can be configured) frequency point according to RSSI by being ranked up to weak sequence by force, and select the strongest frequency point of RSSI into Row down-going synchronous.

S23, terminal judge whether down-going synchronous at least one cell of success and meet the resident thresholding of the cell, if It is to execute step S24, executes step S211 if not.

S24, terminal judge down-going synchronous success and meet in the cell for being resident thresholding to mark with the presence or absence of at least one high speed Knowing is genuine cell, if it does, executing step S25, otherwise, executes step S27.

If synchronizing successfully at least one cell based on the same frequency point, further judgement meets in the cell of resident thresholding With the presence or absence of the cell of the HighSpeedflag=TRUE issued in SIB2, if it is present from HighSpeedflag= Select the strongest cell of RSRP resident in the cell of TRUE, if it does not exist, then selection RSSI times strong frequency point progress downlink is same Step, and repeat above-mentioned process selects RSSI third strong if the cell of HighSpeedflag=TRUE is still not present Frequency point carries out down-going synchronous, and so on, if based on the success of the first priority frequency point down-going synchronous and meeting its resident thresholding Cell in be not present HighSpeedflag=TRUE cell, then select the second priority frequency point and since frequency point scanning Above-mentioned process is executed, if the cell of HighSpeedflag=TRUE is still not present, selects third priority frequency point from frequency point Scanning starts to execute above-mentioned process, and so on.If after all frequency point scannings are completed, synchronizing successfully and meeting resident thresholding Cell in the cell of HighSpeedflag=TRUE is still not present, then from down-going synchronous success and meet resident thresholding Select the strongest cell of RSRP resident in cell.

S25, successively select high speed to be identified as genuine cell by high sequence on earth according to RSRP to attempt to be resident.

When it is implemented, if high speed is identified as genuine cell there are multiple, terminal is according to RSRP by by force to weak suitable Sequence successively attempt it is resident, if attempting failure, from high speed mark in genuine cell, according to RSRP by by force to weak suitable Sequence is successively attempted to be resident, if still failed, selects GSM cell resident.

S26, judge whether to choose successfully resident cell, if so, process terminates, if not, executing step S27.

S27, judge whether to have synchronously completed all frequency points of current priority, if so, execute step S28 if not, Execute step S22.

Whether S28, the priority that currently selects of judgement are for lowest priority, if so, step S29 is executed, if not, holding Row step S21.

S29, meet in the cells for being resident thresholding according to RSRP from all by successively selecting a cell to weak sequence by force It attempts resident.

When it is implemented, if the resident failure of the strongest cell of RSRP, terminal according to RSRP by by force to weak sequence according to It is secondary to attempt to be resident, if still failed, select GSM cell resident.

It should be noted that terminal selection cell is attempted, resident process is same as the prior art, i.e., terminal reads selection The MIB (Master Information Block, Master Information Block) and SIB1 of cell out, if read successfully, judgement should Whether the RSRP of cell is better than the decision threshold that terminal is independently retracted, if it is, the MIB/SIB1/ of the full cell of terminal degree SIB2 initiates RRC Connection Request, if MIB and SIB1 that terminal reads the cell selected are unsuccessful, RSRP strong cell of selection reads MIB and SIB1, and so on, until finding the cell that can be successfully resident.

In the embodiment of the present invention, if there is the cell of HighSpeedflag=TRUE, terminal first from According to RSRP by being successively read MIB and SIB1 to weak sequence by force in the cell of HighSpeedflag=TRUE, if It can not be successfully resident in the cell of HighSpeedflag=TRUE, then never configure HighSpeedflag=TRUE (i.e. again High speed mark be not true) cell according to RSRP by being successively read MIB and SIB1 to weak sequence by force.

S210, judge whether to choose successfully resident cell, if so, process terminates, if not, executing step S225。

S211, judge whether pre-set protection timer is overtime, if so, step S212 is executed, if not, executing Step S213.

S212, terminal selection GSM cell are resident, and process terminates.

S213, judgement currently select frequency point whether for currently select priority the last one frequency point, if so, executing step Rapid S214, if not, executing step 22.

When it is implemented, whether judgement currently select frequency point currently to select in the corresponding all frequency points of priority RSSI most A low frequency point.

Otherwise whether the priority that S214, judgement currently select is held for lowest priority if so, executing step S215 Row step S21.

S215, starting LTE full band scan.

S216, judge whether that scanning to available frequency point, if so, executing step S217, otherwise, executes step S225.

S217, according to RSSI by carrying out down-going synchronous to one frequency point of weak sequential selection by force.

S218, judge whether down-going synchronous at least one cell of success and meet the resident thresholding of the cell, if so, holding Row step S219, if not, executing step S225.

S219, terminal judge down-going synchronous success and meet in the cell for being resident thresholding to mark with the presence or absence of at least one high speed Knowing is genuine cell, if it does, executing step S220, otherwise, executes step S222.

S220, it attempts to be resident by successively selecting high speed to be identified as genuine cell to weak sequence by force according to RSRP.

When it is implemented, if high speed is identified as the resident failure of genuine cell, according to RSSI by selecting to weak sequence by force Next frequency point is selected to synchronize, and so on, if all high speeds are identified as, genuine cell is resident to fail, and identifies from high speed Not to be resident according to RSRP by successively attempting to weak sequence by force in genuine cell, if failed, select GSM resident.

S221, judge whether to choose and be resident successful cell, if so, process terminates, if not, executing step S223。

S222, judge whether to have synchronously completed all frequency points, if so, executing step S223, otherwise, execute step S217。

S223, from the success of all down-going synchronous and meet high speed mark of its resident thresholding in genuine cell according to RSRP is successively attempted by by force to weak sequence resident.

S224, judge whether to choose and be resident successful cell, if so, process terminates, if not, executing step S225。

S225, judge whether pre-set protection timer is overtime, if so, step S226 is executed, if not, executing Step S215.

S226, terminal selection GSM cell are resident.

Preferably, terminal can also be directed to each frequency point, PCI (Physical Cell corresponding with the frequency point is stored ) or CI (cell ID, Cell Identifier) Identifier.When it is implemented, it is directed to each frequency point of the first priority, If terminal is based on the same frequency point and synchronizes successfully multiple cells, first determine whether deposit in the successful cell of down-going synchronous In the corresponding cell of the pre-stored frequency point, if there is and meet resident thresholding, then select corresponding cell resident, if There are multiple corresponding cells, then select the highest cell of RSRP resident, if there is corresponding cell but be unsatisfactory for corresponding When the resident thresholding of cell, then execute step S23.

Following two embodiment can be divided into according to terminal current state for non-high-speed mobile context：

The first embodiment, moving velocity of terminal (can be, but not limited to be set as more than or equal to pre-set velocity threshold value 200km/h) or terminal carries out the CSFB voice communication cell configuration high-speed that the last time is resident before and is identified as very.

As shown in figure 3, being the implementation process diagram of the first embodiment, include the following steps：

S31, terminal are according to the priority determined by successively selecting the frequency point an of priority to carry out to weak sequence by force Frequency point scanning.

When it is implemented, terminal determines the preferential of each frequency point in LTE frequency point list according to non-high-speed scene ordering strategy After grade, successively it is grouped and is scanned since the first priority frequency point.I.e. terminal is preferentially to the frequency in the first priority frequency point Point carries out the scanning based on RSSI.

S32, according to RSSI by carrying out down-going synchronous to one frequency point of weak sequential selection by force.

When it is implemented, according to the scanning result of step S31, to meet terminal preset RSSI thresholding (when it is implemented, RSSI can be configured) frequency point according to RSSI by being ranked up to weak sequence by force, and select the strongest frequency point of RSSI into Row down-going synchronous.

S33, terminal judge whether down-going synchronous at least one cell of success and meet the resident thresholding of the cell, if It is to execute step S34, executes step S311 if not.

S34, terminal judge down-going synchronous success and meet in the cell for being resident thresholding to mark with the presence or absence of at least one high speed Knowing is genuine cell, if it does, executing step S35, otherwise, executes step S36.

If synchronizing successfully at least one cell based on the same frequency point, judges to meet in resident thresholding cell and whether deposit The cell of the HighSpeedflag=TRUE issued in SIB2, if it is present from the small of HighSpeedflag=TRUE It selects the strongest cell of RSRP resident in area, if it does not exist, then RSSI strong frequency point of selection carries out down-going synchronous, and repeats Above-mentioned process, if the cell of HighSpeedflag=TRUE is still so not present, the frequency point for selecting RSSI third strong is carried out Down-going synchronous, and so on, if based on the success of the first priority frequency point down-going synchronous and met in the cell of its resident thresholding There is no the cells of HighSpeedflag=TRUE, then select the second priority frequency point and execute since frequency point scanning above-mentioned Process selects third priority frequency point since frequency point scanning if the cell of HighSpeedflag=TRUE is still not present Above-mentioned process is executed, and so on.If after all frequency point scannings are completed, synchronizing successfully and meeting and be resident in the cell of thresholding Still the cell of HighSpeedflag=TRUE is not present, then is selected from the cell of down-going synchronous success and the resident thresholding of satisfaction It is resident to select the strongest cell of RSRP.

S35, successively select high speed to be identified as genuine cell by high sequence on earth according to RSRP to attempt to be resident.

S36, judge whether to choose successfully resident cell, if so, process terminates, if not, executing step S37.

S37, judge whether to have synchronously completed all frequency points of current priority, if so, execute step S38 if not, Execute step S32.

Whether S38, the priority that currently selects of judgement are for lowest priority, if so, step S39 is executed, if not, holding Row step S31.

S39, meet in the cells for being resident thresholding according to RSRP from all by successively selecting a cell to weak sequence by force It attempts resident.

S310, judge whether to choose successfully resident cell, if so, process terminates, if not, executing step S325。

S311, judge whether pre-set protection timer is overtime, if so, step S312 is executed, if not, executing Step S313.

S312, terminal selection GSM cell are resident, and process terminates.

S313, judgement currently select frequency point whether for currently select priority the last one frequency point, if so, executing step Rapid S314, if not, executing step 32.

Otherwise whether the priority that S314, judgement currently select is held for lowest priority if so, executing step S315 Row step S31.

S315, starting LTE full band scan.

S316, judge whether that scanning to available frequency point, if so, executing step S317, otherwise, executes step S325.

S317, according to RSSI by carrying out down-going synchronous to one frequency point of weak sequential selection by force.

S318, judge whether down-going synchronous at least one cell of success and meet the resident thresholding of the cell, if so, holding Row step S319, if not, executing step S325.

S319, terminal judge down-going synchronous success and meet in the cell for being resident thresholding to mark with the presence or absence of at least one high speed Knowing is genuine cell, if it does, executing step S320, otherwise, executes step S322.

S320, it attempts to be resident by successively selecting high speed to be identified as genuine cell to weak sequence by force according to RSRP.

S321, judge whether to choose and be resident successful cell, if so, process terminates, if not, executing step S323。

S322, judge whether to have synchronously completed all frequency points, if so, executing step S323, otherwise, execute step S317。

S323, from the success of all down-going synchronous and meet high speed mark of its resident thresholding in genuine cell according to RSRP is successively attempted by by force to weak sequence resident.

S324, judge whether to choose and be resident successful cell, if so, process terminates, if not, executing step S325。

S325, judge whether pre-set protection timer is overtime, if so, step S326 is executed, if not, executing Step S315.

S326, terminal selection GSM cell are resident.

Second of embodiment, moving velocity of terminal are more than that pre-set velocity threshold value (can be, but not limited to be set as 200km/ H) and terminal carries out the CSFB voice communication cell configuration high-speed that the last time is resident before and is identified as very.As shown in figure 4, for this The implementation process diagram for second of embodiment that inventive embodiments provide, includes the following steps：

S41, terminal are according to the priority determined by successively selecting the frequency point an of priority to carry out to weak sequence by force Frequency point scanning.

S42, according to RSSI by carrying out down-going synchronous to one frequency point of weak sequential selection by force.

When it is implemented, according to the scanning result of step S41, to meet terminal preset RSSI thresholding (when it is implemented, RSSI can be configured) frequency point according to RSSI by being ranked up to weak sequence by force, and select the strongest frequency point of RSSI into Row down-going synchronous.

S43, terminal judge whether down-going synchronous at least one cell of success and meet the resident thresholding of the cell, if It is to execute step S44, executes step S49 if not.

S44, terminal according to RSRP by by force to weak sequence from down-going synchronous success and meet in the cell of resident thresholding according to Secondary one cell of selection is attempted resident.

When it is implemented, if terminal is based on same frequency point and synchronizes successfully at least one cell, terminal can be according to RSRP successively selects a cell to attempt to be resident by high to weak sequence, if be resident successfully, process terminates, and otherwise, terminal is pressed According to RSSI by synchronizing to next frequency point in weak sequential selection current priority by force, and above-mentioned process is repeated, successively class It pushes away, if selected based on the success of the first priority frequency point down-going synchronous and cell for meeting its resident thresholding is resident unsuccessful It selects the second priority frequency point and executes above-mentioned process since frequency point scanning, successively if still do not chosen resident successful Cell, then terminal selection third priority frequency point executes above-mentioned process since frequency point scanning, and so on, if all frequency points After scanning is completed, terminal does not still choose successfully resident cell, then terminal selection GSM cell is resident.

S45, terminal judge whether to be resident successfully, if so, process terminates, if not, executing step S46.

S46, judge whether to have synchronously completed all frequency points of current priority, if so, execute step S47 if not, Execute step S42.

Whether S47, the priority that currently selects of judgement are for lowest priority, if so, step S419 is executed, if not, Execute step S41.

S48, terminal selection GSM cell are resident.

S49, judge whether pre-set protection timer is overtime, if so, step S48 is executed, if not, executing step Rapid S410.

S410, judgement currently select frequency point whether for currently select priority the last one frequency point, if so, executing step Rapid S411, if not, executing step 42.

Otherwise whether the priority that S411, judgement currently select is held for lowest priority if so, executing step S412 Row step S41.

S412, starting LTE full band scan.

S413, judge whether that scanning to available frequency point, if so, executing step S414, otherwise, executes step S419.

S414, according to RSSI by successively selecting frequency point to carry out down-going synchronous to weak sequence by force.

S415, judge whether down-going synchronous at least one cell of success and meet the resident thresholding of the cell, if so, holding Row step S416, if not, executing step S419.

According to RSRP by by force to weak sequence in S416, cell successful from all down-going synchronous and meeting its resident thresholding A cell is successively selected to attempt resident.

S417, judge whether to choose and be resident successful cell, if so, process terminates, otherwise, execute step S418.

S418, judge whether to have synchronously completed all frequency points, if so, executing step S419, otherwise, execute step S414。

S419, judge whether pre-set protection timer is overtime, if so, step S420 is executed, if not, executing Step S412.

S420, terminal selection GSM cell are resident.

It should be noted that the embodiment of the present invention is suitable for following application scenarios：It is that CSFB voice call is hung that terminal, which meets, Without carrying redirection target cell, (cell can be small for 2G, 3G or 4G in disconnected and " Channel Release " message Area), if terminal is that CSFB voice is hung up, and carries redirection target cell in Channel Release " message, then eventually End executes according to the redirection target cell carried in " Channel Release " message and redirects process, if terminal It is hung up for GSM, but without carrying redirection target cell, (cell can be 2G, 3G in Channel Release " message Or 4G cell), then terminal selection GSM cell is resident；If terminal is hung up for GSM, and in Channel Release " message Redirection target cell is carried, then terminal is held according to the redirection target cell carried in " Channel Release " message Row redirects process.

I.e. in the embodiment of the present invention, before executing step S21, step S31 and step S41, can with it is first determined whether Meet the applicable scene of the present invention, that is, judges whether to meet the following conditions：Judge terminal whether be CSFB voice call hang up and Without carrying redirection target cell in " Channel Release " message (cell can be 2G, 3G or 4G cell).Such as Fruit meets, then executes subsequent step.

The method that terminal provided in an embodiment of the present invention independently returns to network executes difference for the terminal under different scenes Return LTE network side strategy, if terminal meets high-speed mobile scene, i.e., moving velocity of terminal be more than pre-set velocity threshold value and When the last resident cell configuration high-speed is identified as true before carrying out CSFB voice communication, then according to high-speed mobile sequence plan It slightly determines the priority of each frequency point in LTE frequency point list, and is successively scanned according to the frequency point priority determined, and preferential Selection high speed is identified as genuine cell and is resident, if terminal is unsatisfactory for high-speed mobile scene, and if moving velocity of terminal is more than When the last resident cell configuration high-speed is identified as true before pre-set velocity threshold value or progress CSFB voice communication, then press The priority of each frequency point in LTE frequency point list is determined according to non-high-speed move ordering strategy, and according to the frequency point priority determined It is successively scanned, and it is resident preferentially to select high speed to be identified as genuine cell；If moving velocity of terminal is no more than pre-set velocity When the last resident cell configuration high-speed mark is not true before threshold value and progress CSFB voice communication, then according to non-high-speed Move ordering strategy determines the priority of each frequency point in LTE frequency point list, and is successively carried out according to the frequency point priority determined Scanning, and according to RSSI by successively selecting a cell to attempt to be resident to weak sequence by force, so that terminal is terminating CSFB , can be resident with the matched LTE cell of current motion state according to the current motion state selection of terminal after call, it improves Network service performance ensure that network service quality.

It should be noted that the embodiment of the present invention is suitable under high-speed mobile scene, if there is LTE high speed private network (i.e. HighSpeedflag=TRUE) frequency point and common public network frequency point mixing overlay area, terminal can be by implementing the present invention The scheme that embodiment provides quickly returns to the corresponding cell of LTE high speed private network frequency point, so as to guarantee terminal in high-speed mobile Network service performance when under state；If terminal is under non-moving state, configured if there is indoor and outdoors different Under the scene of LTE frequency point, it is outdoor no matter terminal enters by interior into outdoor or by interior, and terminal can be by implementing this hair The strongest cell of the quick return signal of scheme that bright embodiment provides, to can also guarantee network service performance.

Based on the same inventive concept, device and end that a kind of terminal independently returns to network are additionally provided in the embodiment of the present invention End, it is similar that the principle solved the problems, such as due to above-mentioned apparatus and terminal independently returns to the method for network to terminal, above-mentioned apparatus And the implementation of terminal may refer to the implementation of method, overlaps will not be repeated.

As shown in figure 5, the structural schematic diagram of the device of network is independently returned for terminal provided in an embodiment of the present invention, it can be with Including：

Storage unit 51, for storing frequency point column corresponding with the PLMN for each public land mobile network PLMN Table；

Judging unit 52, for judging whether the terminal meets height when carrying out circuit domain dropping CSFB voice communication Fast mobile condition；

Determination unit 53 is when being, according to high-speed mobile scene frequency point for the judging result in the judging unit 52 Ordering strategy determines the priority for carrying out each frequency point in the CSFB corresponding frequency point list of place PLMN before；It is single in the judgement It is corresponding to place PLMN before carrying out CSFB according to non-high-speed mobile context frequency point ordering strategy when the judging result of member 52 is no Frequency point list in each frequency point priority；

Processing unit 54, for being corresponded to according to place PLMN before carrying out CSFB after the CSFB voice communication Frequency point list in the priority orders of each frequency point successively Grouping scan and select the cell for meeting condition resident.

When it is implemented, determination unit 53, can be used for when meeting the high-speed mobile condition, determine carry out CSFB it In the corresponding frequency point list of preceding place PLMN, the subdistrict frequency point of CSFB voice communication foregoing description terminal persistent district and It is the first priority frequency point that configuration high-speed, which is identified as the adjacent area frequency point of genuine adjacent area, in the adjacent area of the persistent district；It determines and carries out Configuration high-speed mark is not genuine adjacent area in the corresponding frequency point list of PLMN where before CSFB, in the adjacent area of the persistent district Adjacent area frequency point be the second priority frequency point；It determines in the corresponding frequency point list of PLMN where before carrying out CSFB except first is preferential Other frequency points other than grade frequency point and the second priority frequency point are third priority frequency point.

When it is implemented, high-speed mobile condition may include：The moving velocity of terminal is more than or equal to pre-set velocity threshold value And the last resident cell configuration high-speed is identified as very before carrying out CSFB voice communication；And the processing unit 54, May include：First frequency point scanning subelement, for according to the priority determined by successively selecting one to weak sequence by force The frequency point of priority carries out frequency point scanning；And the first judgment sub-unit judging result be priority that is no and currently selecting When not being lowest priority, each frequency point of next priority is selected to be scanned；First down-going synchronous subelement, for according to connecing Signal strength instruction RSSI is received by frequency point carries out down-going synchronous one by one to weak sequence by force；First judgment sub-unit, for judging Judge down-going synchronous success and meet in the cell for being resident thresholding to be identified as genuine cell at a high speed with the presence or absence of at least one；First Resident subelement is when being, according to Reference Signal Received Power RSRP for the judging result in first judgment sub-unit It attempts to be resident by successively selecting a high speed to be identified as genuine cell to weak sequence by force；And in the first judgement The judging result of unit is that the priority that the no and described frequency point scanning subelement currently selects is lowest priority, then from all full According to Reference Signal Received Power RSRP by successively selecting a cell to attempt to weak sequence by force in the cell of the resident thresholding of foot It is resident.

Preferably, further including each frequency point corresponding Physical Cell Identifier PCI or cell ID CI in the frequency point list； And the processing unit 54, it can also include the second judgment sub-unit, wherein：Second judgment sub-unit, for being directed to first Priority frequency point, after down-going synchronous subelement down-going synchronous success and first judgment sub-unit judgement is It is no be identified as genuine cell at a high speed there are at least one before, it is corresponding according to the first priority frequency point in the frequency point list PCI or CI judges in the successful cell of down-going synchronous with the presence or absence of the corresponding cell of the first priority frequency point；Described One resident subelement, for being to be and meet the resident door of corresponding cell in the judging result of second judgment sub-unit Limit then selects corresponding cell resident；First judgment sub-unit, for the judging result in second judgment sub-unit To be and being unsatisfactory for the resident thresholding of corresponding cell or when the judging result of second judgment sub-unit is no, execution is sentenced The step of being identified as genuine cell with the presence or absence of high speed in the cell of disconnected down-going synchronous success and the resident thresholding of satisfaction.

When it is implemented, the determination unit 53, for determining and carrying out CSFB when being unsatisfactory for the high-speed mobile condition Where before in the corresponding frequency point list of PLMN, the subdistrict frequency point of CSFB voice communication foregoing description terminal persistent district be First priority frequency point；It determines in the corresponding frequency point list of current PLMN, the CSFB voice communication foregoing description terminal is resident The adjacent area frequency point of the adjacent area of cell is the second priority frequency point；It determines in the corresponding frequency point list of current PLMN except the first priority Frequency point other than frequency point and the second priority frequency point is third priority frequency point.

When it is implemented, processing unit 54, may include the second frequency point scanning subelement, if for the mobile speed of the terminal Degree the last resident cell configuration high-speed mark before being more than or equal to pre-set velocity threshold value or carrying out CSFB voice communication When being true, swept according to the priority determined by successively selecting the frequency point sets an of priority to carry out frequency point to weak sequence by force It retouches；And third judgment sub-unit judging result be priority that is no and currently selecting be not lowest priority, then select Each frequency point of next priority is scanned；Second down-going synchronous subelement, according to RSSI by by force to weak sequence frequency point one by one Carry out down-going synchronous；Whether third judgment sub-unit deposits for judging down-going synchronous success and meeting in the cell for being resident thresholding It is identified as genuine cell at a high speed at least one；Second resident subelement, for the judgement knot in the third judgment sub-unit Fruit is to attempt to be resident by successively selecting a high speed to be identified as genuine cell to weak sequence by force according to RSRP when being；Described The judging result of third judgment sub-unit is that priority that is no and currently selecting is lowest priority, meets resident thresholding from all Cell according to RSRP successively to select cell to attempt to weak sequence by by force resident.

When it is implemented, processing unit 54, including third frequency point scanning subelement, if not for the moving velocity of terminal More than pre-set velocity threshold value and when the last resident cell configuration high-speed mark is not true before carrying out CSFB voice communication, According to the priority determined by successively selecting the frequency point sets an of priority to carry out frequency point scanning to weak sequence by force；And If it is not lowest priority that third, which is resident subelement and is resident priority that is unsuccessful and currently selecting, next priority is selected Each frequency point be scanned；Third down-going synchronous subelement, for according to received signal strength indicator RSSI by by force to weak suitable Frequency point carries out down-going synchronous to sequence one by one；Third is resident subelement, for according to Reference Signal Received Power RSRP by by force to weak It is resident that sequence successively selects a cell to attempt.

For convenience of description, above each section is divided by function describes respectively for each module (or unit).Certainly, exist Implement to realize the function of each module (or unit) in same or multiple softwares or hardware when the present invention.

When it is implemented, the device that terminal provided in an embodiment of the present invention independently returns to network can be set in terminal.

It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more, The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces The form of product.

The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.

Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as It selects embodiment and falls into all change and modification of the scope of the invention.

Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims

1. a kind of method that terminal independently returns to network, which is characterized in that the terminal is directed to each public land mobile network PLMN stores frequency point list corresponding with the PLMN；

The method, including：

When the terminal resided in long term evolution LTE and its evolvement network carries out circuit domain dropping CSFB voice communication, judgement Whether the terminal meets high-speed mobile condition；

The CSFB corresponding frequency point list of place PLMN before is carried out if so, determining according to high-speed mobile scene frequency point ordering strategy In each frequency point priority, if not, according to non-high-speed mobile context frequency point ordering strategy determine carry out CSFB before where The priority of each frequency point in the corresponding frequency point list of PLMN；

After the CSFB voice communication, according to each frequency point before carrying out CSFB in the corresponding frequency point list of place PLMN Priority orders successively Grouping scan and select the cell for meeting condition resident, so that the terminal is returned to LTE and its evolution net In network.

2. the method as described in claim 1, which is characterized in that determine and carry out according to high-speed mobile scene frequency point ordering strategy The priority of each frequency point in the corresponding frequency point list of PLMN where before CSFB, including：

It determines in the corresponding frequency point list of PLMN where before carrying out CSFB, the CSFB voice communication foregoing description terminal is resident It is first that configuration high-speed, which is identified as the adjacent area frequency point of genuine adjacent area, in the adjacent area of the subdistrict frequency point of cell and the persistent district Priority frequency point；

It determines in the corresponding frequency point list of PLMN where before carrying out CSFB, configuration high-speed identifies in the adjacent area of the persistent district It is not the second priority frequency point for the adjacent area frequency point of genuine adjacent area；

It determines in the corresponding frequency point list of PLMN where before carrying out CSFB and removes the first priority frequency point and the second priority frequency point Other frequency points in addition are third priority frequency point.

3. method according to claim 2, which is characterized in that the high-speed mobile condition includes：The moving velocity of terminal More than or equal to pre-set velocity threshold value and before carrying out CSFB voice communication, the last resident cell configuration high-speed is identified as very； And

According to the priority orders successively Grouping scan of each frequency point in the corresponding frequency point list of PLMN where carrying out before CSFB And select the cell for meeting condition resident, including：

According to the priority determined by successively selecting the frequency point an of priority to carry out frequency point scanning to weak sequence by force；And

Judge down-going synchronous success and meet in the cell for being resident thresholding to be identified as genuine cell at a high speed with the presence or absence of at least one；

If it is present according to Reference Signal Received Power RSRP by successively selecting a high speed to be identified as very to weak sequence by force Cell attempt it is resident；

If there is no and currently the priority that selects is lowest priority, then from all cells for meeting resident thresholding according to Reference Signal Received Power RSRP to weak sequence by successively selecting a cell to attempt to be resident by force；

If there is no and currently the priority that selects is not lowest priority, then select each frequency point of next priority to be swept It retouches.

4. method as claimed in claim 3, which is characterized in that further include that the corresponding physics of each frequency point is small in the frequency point list Area identifies PCI or cell ID CI；And

It judges whether there is at least one after down-going synchronous success for the first priority frequency point and is identified as at a high speed really Before cell, further include：

According to the corresponding PCI or CI of the first priority frequency point in the frequency point list, judge in the successful cell of down-going synchronous With the presence or absence of the corresponding cell of the first priority frequency point；

If there is and be unsatisfactory for the resident thresholding of corresponding cell or there is no the corresponding cell of the first priority frequency point, then It executes and judges down-going synchronous success and meet the step of being identified as genuine cell with the presence or absence of high speed in the cell for being resident thresholding.

5. the method as described in claim 1, which is characterized in that it is characterized in that, sorting according to non-high-speed mobile context frequency point Strategy determines the priority for carrying out each frequency point in the CSFB corresponding frequency point list of place PLMN before, including：

It determines in the corresponding frequency point list of PLMN where before carrying out CSFB, the CSFB voice communication foregoing description terminal is resident The subdistrict frequency point of cell is the first priority frequency point；

It determines in the corresponding frequency point list of current PLMN, the adjacent area of CSFB voice communication foregoing description terminal persistent district Adjacent area frequency point is the second priority frequency point；

Determine that the frequency point in the corresponding frequency point list of current PLMN in addition to the first priority frequency point and the second priority frequency point is Third priority frequency point.

6. method as claimed in claim 5, which is characterized in that if the moving velocity of terminal is more than or equal to pre-set velocity threshold value Or before carrying out CSFB voice communication when the last resident cell configuration high-speed is identified as true, according to before carrying out CSFB The priority orders of each frequency point in the corresponding frequency point list of place PLMN successively Grouping scan and select to meet the cell of condition It is resident, including：

According to the priority determined by successively selecting the frequency point sets an of priority to carry out frequency point scanning to weak sequence by force； And

7. method as claimed in claim 5, which is characterized in that if the moving velocity of terminal be no more than pre-set velocity threshold value and When the last resident cell configuration high-speed mark is not true before progress CSFB voice communication, according to institute before progress CSFB The priority orders of each frequency point in the corresponding frequency point list of the PLMN cell that successively Grouping scan and selection meet condition is stayed It stays, including：

If being resident priority that is unsuccessful and currently selecting is not lowest priority, select each frequency point of next priority into Row scanning.

8. the device that a kind of terminal independently returns to network, which is characterized in that including：

Judging unit, for carrying out circuit domain dropping CSFB language when the terminal resided in long term evolution LTE and its evolvement network When sound is conversed, judge whether the terminal meets high-speed mobile condition；

Determination unit is when being, according to high-speed mobile scene frequency point ordering strategy for the judging result in the judging unit Determine the priority of each frequency point in the corresponding frequency point list of PLMN where before carrying out CSFB；In the judgement of the judging unit When being as a result no, determine that the corresponding frequency point of PLMN is arranged where before carrying out CSFB according to non-high-speed mobile context frequency point ordering strategy The priority of each frequency point in table；

Processing unit is used for after the CSFB voice communication, according to PLMN corresponding frequency point in place before carrying out CSFB The priority orders of each frequency point in the list cell that successively Grouping scan and selection meet condition is resident, and the terminal is returned In LTE and its evolvement network.

9. device as claimed in claim 8, which is characterized in that

The determination unit, for when meeting the high-speed mobile condition, determining that PLMN where before carrying out CSFB is corresponding In frequency point list, the neighbour of the subdistrict frequency point of CSFB voice communication foregoing description terminal persistent district and the persistent district It is the first priority frequency point that configuration high-speed, which is identified as the adjacent area frequency point of genuine adjacent area, in area；PLMN where determining before carrying out CSFB Configuration high-speed mark is not second for the adjacent area frequency point of genuine adjacent area in corresponding frequency point list, in the adjacent area of the persistent district Priority frequency point；It is determining to carry out removing the first priority frequency point and second preferentially in the CSFB corresponding frequency point list of place PLMN before Other frequency points other than grade frequency point are third priority frequency point.

10. device as claimed in claim 9, which is characterized in that the high-speed mobile condition includes：The moving velocity of terminal More than or equal to pre-set velocity threshold value and before carrying out CSFB voice communication, the last resident cell configuration high-speed is identified as very； And

The processing unit, including：

First frequency point scanning subelement, for according to the priority determined by successively selecting a priority to weak sequence by force Frequency point carry out frequency point scanning；And the first judgment sub-unit judging result be priority that is no and currently selecting be not most When low priority, each frequency point of next priority is selected to be scanned；

First down-going synchronous subelement, for according to received signal strength indicator RSSI by by force to weak sequence one by one frequency point carry out Down-going synchronous；

First judgment sub-unit, for judging down-going synchronous success and meeting in the cell for being resident thresholding with the presence or absence of at least One high speed is identified as genuine cell；

First resident subelement is when being, to receive according to reference signal for the judging result in first judgment sub-unit Power RSRP attempts to be resident by successively selecting a high speed to be identified as genuine cell to weak sequence by force；And for described the The judging result of one judgment sub-unit is that the priority that the no and described frequency point scanning subelement currently selects is lowest priority, then According to Reference Signal Received Power RSRP by successively selecting one to weak sequence by force from all cells for meeting resident thresholding Cell is attempted resident.

11. device as claimed in claim 10, which is characterized in that further include the corresponding physics of each frequency point in the frequency point list Cell ID PCI or cell ID CI；And

The processing unit further includes the second judgment sub-unit, wherein：

Second judgment sub-unit, for being directed to the first priority frequency point, in the down-going synchronous subelement down-going synchronous success Afterwards and first judgment sub-unit judges whether there is at least one and is identified as at a high speed before genuine cell, according to described The corresponding PCI or CI of first priority frequency point in frequency point list judges in the successful cell of down-going synchronous with the presence or absence of described The corresponding cell of first priority frequency point；

The first resident subelement is to be and meet corresponding cell for the judging result in second judgment sub-unit Resident thresholding, then select corresponding cell resident；

First judgment sub-unit is to be and be unsatisfactory for corresponding small for the judging result in second judgment sub-unit When the judging result of the resident thresholding in area or second judgment sub-unit is no, execution judges down-going synchronous success and meets The step of being identified as genuine cell with the presence or absence of high speed in the cell of resident thresholding.

12. device as claimed in claim 8, which is characterized in that

The determination unit, it is corresponding for PLMN where when being unsatisfactory for the high-speed mobile condition, determining before carrying out CSFB Frequency point list in, the subdistrict frequency point of CSFB voice communication foregoing description terminal persistent district be the first priority frequency point； It determines in the corresponding frequency point list of current PLMN, the adjacent area of the adjacent area of CSFB voice communication foregoing description terminal persistent district Frequency point is the second priority frequency point；It determines in the corresponding frequency point list of current PLMN except the first priority frequency point and the second priority Frequency point other than frequency point is third priority frequency point.

13. device as claimed in claim 12, which is characterized in that the processing unit, including：

Second frequency point scanning subelement, if being more than or equal to pre-set velocity threshold value for the moving velocity of terminal or carrying out CSFB When the last resident cell configuration high-speed is identified as true before voice communication, according to the priority determined by by force to weak Sequence successively selects the frequency point sets an of priority to carry out frequency point scanning；And it is in the judging result of third judgment sub-unit Priority that is no and currently selecting is not lowest priority, then each frequency point of next priority is selected to be scanned；

Second down-going synchronous subelement, according to received signal strength indicator RSSI by frequency point carries out downlink one by one to weak sequence by force It is synchronous；

Second resident subelement is when being, to receive according to reference signal for the judging result in the third judgment sub-unit Power RSRP attempts to be resident by successively selecting a high speed to be identified as genuine cell to weak sequence by force；Son is judged in the third The judging result of unit is that priority that is no and currently selecting is lowest priority, is pressed from all cells for meeting resident thresholding According to Reference Signal Received Power RSRP by successively selecting a cell to attempt to be resident to weak sequence by force.

14. device as claimed in claim 12, which is characterized in that the processing unit, including：

Third frequency point scanning subelement, if being no more than pre-set velocity threshold value for the moving velocity of terminal and carrying out CSFB voice When the last resident cell configuration high-speed mark is not true before call, according to the priority determined by by force to weak suitable Sequence successively selects the frequency point sets an of priority to carry out frequency point scanning；And if third be resident subelement be resident it is unsuccessful and The priority currently selected is not lowest priority, then each frequency point of next priority is selected to be scanned；

Third down-going synchronous subelement, for according to received signal strength indicator RSSI by by force to weak sequence one by one frequency point carry out Down-going synchronous；

Third is resident subelement, for according to Reference Signal Received Power RSRP by successively selecting a cell to weak sequence by force It attempts resident.

15. a kind of terminal, which is characterized in that independently return to net including terminal described in claim 8~14 any claim The device of network.