CN110267319A - Method, mobile terminal and the system of LTE network are returned based on position - Google Patents
Method, mobile terminal and the system of LTE network are returned based on position Download PDFInfo
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- CN110267319A CN110267319A CN201910647369.4A CN201910647369A CN110267319A CN 110267319 A CN110267319 A CN 110267319A CN 201910647369 A CN201910647369 A CN 201910647369A CN 110267319 A CN110267319 A CN 110267319A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
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Abstract
The present invention provide it is a kind of based on position return LTE network method include: MME preservation have each base station position information and related cell frequency point information under its command, and be handed down to mobile terminal preservation；After mobile terminal call, if not receiving the information of LTE network subdistrict frequency point, according to the location information of its current location information and each base station of preservation, calculate at a distance from each base station；And the related cell frequency point of the nearest base station of selected distance is returned, if return is unsuccessful, successively selected distance carries out return trial from the related cell frequency point closely to other remote base stations, until success.The present invention also provides corresponding terminal and systems.Method, terminal and system of the present invention based on position return LTE network measures the signal strength or weakness of mobile terminal peripheral base station by the location information of mobile terminal and peripheral base station, the relevant subdistrict frequency point of optimum base station is chosen to return, the time back to 4G network is shortened, keeps user experience more preferable.
Description
Technical field
The present invention relates to fields of communication technology, and in particular to it is a kind of based on position return LTE network method, one kind be based on
The mobile terminal of position return LTE network and a kind of system that LTE network is returned to based on position.
Background technique
Based on LTE (Long Term Evolution, long term evolution) network of the full IP design of packet domain, biography can not be carried
The circuit domain voice service of system, the target protocol of carrying voice are that (IP Multimedia Subsystem, IP is more based on IMS
Media subsystem) VoLTE (Voice Over LTE, long term evolution voice bearer) scheme carrying VoIP service (Voice
Over Internet Protocol, IP-based voice transfer, the i.e. networking telephone).But in VoLTE industry maturation and LTE net
Before network satisfies the requirements, it is still necessary to use 2G/3G network carrying voice, that is, use CSFB (Circuit Switched
Fallback, circuit domain dropping) scheme directly provides voice service using 2G/3G network.The basic ideas of CSFB scheme are
When mobile terminal resides in LTE network Idle state or data service connected state, when there is voice service demand (caller or by
Cry), it is fallen after rise by LTE network auxiliary to 2G/3G network and establishes voice service, return again to LTE network after talk-through.
The method that mobile terminal returns to LTE network after end of conversation at present is: by MSC (Mobile Switching
Centre, mobile switching centre) instruction RNC (Radio Network Controller, radio network controller), eventually to movement
End sends the information for returning to LTE network subdistrict frequency point, returns to LTE net according to LTE network subdistrict frequency point after mobile terminal reception
Network；But if LTE network subdistrict frequency point is not configured in RNC, or mobile terminal is caused not have due to wireless access signal
Receive the information of LTE network subdistrict frequency point, mobile terminal is by from master mode or passing through 2G/3G/4G multilayer network selection mode
It back to 4G network, takes a long time, user's perception is bad.
Summary of the invention
The technical issues of LTE network takes a long time is returned in order at least partly solve mobile terminal existing in the prior art
And complete the present invention.
Solving technical solution used by present invention problem is:
The present invention provides a kind of method for returning to LTE network based on position, comprising:
MME (Mobility Management Entity, mobility management entity) saves the position for having each base station under its command
Information and related cell frequency point information, and all information are handed down to mobile terminal by base station, it is saved by mobile terminal；
After mobile terminal call, if not receiving the information for the LTE network subdistrict frequency point that RNC is issued, move
Terminal has the location information of each base station under its command according to the MME of its current location information and preservation, calculate its with each base station away from
From；
Mobile terminal chooses the related cell frequency point therewith apart from nearest base station according to results of measuring and carries out returning to LTE net
Network test is successively chosen distance therewith and is carried out from the related cell frequency point closely to other remote base stations if return is unsuccessful
It returns and attempts, until returning successfully.
Further, after mobile terminal call further include:
Mobile terminal starts timer；If mobile terminal does not receive the LTE that RNC is issued yet after timer timing
The information of network cell frequency point, then mobile terminal has the position of each base station under its command according to the MME of its current location information and preservation
Information starts to calculate it at a distance from each base station.
Further, after mobile terminal call further include:
Mobile terminal starts timer；While timer starts timing, mobile terminal is according to its current location information
The location information for having each base station under its command with the MME of preservation starts to calculate it at a distance from each base station；Terminate in timer timing
Mobile terminal starts return LTE network test again afterwards.
Further, mobile terminal is chosen the related cell frequency point apart from nearest base station therewith according to results of measuring and is carried out
Return includes: that mobile terminal all carries out returning to LTE network test to all subdistrict frequency points apart from nearest base station.
According to another aspect of the present invention, the present invention also provides a kind of mobile terminal that LTE network is returned based on position, packets
It includes: receiving module, measurement module and processing module；
Receiving module is used to receive the location information for having each base station under its command that MME is saved and related cell frequency point information and protects
It deposits, and receives the information for the LTE network subdistrict frequency point that RNC is issued；
Measurement module is used for after mobile terminal call, and receiving module does not receive the LTE network cell that RNC is issued
In the case where the information of frequency point, each base station is had under its command according to the MME that mobile terminal current location information and receiving module save
Location information calculates mobile terminal at a distance from each base station；
Processing module is used to be chosen according to the results of measuring of measurement module related to the nearest base station of distance of mobile terminal
Subdistrict frequency point carries out return test, if return is unsuccessful, successively chooses and distance of mobile terminal is from closely to other remote bases
The related cell frequency point stood carries out return trial, until returning successfully.
Further, the mobile terminal further includes timer；
The timer is used to start timing after mobile terminal call；
If receiving module does not receive the information for the LTE network subdistrict frequency point that RNC is issued yet after timer timing,
Then measurement module is believed according to the position that the MME that the current location information and receiving module of mobile terminal are kept has each base station under its command
Breath starts to calculate mobile terminal at a distance from each base station.
Further, the mobile terminal further includes timer；
The timer is used to start timing after mobile terminal call；
While timer starts timing, measurement module is protected according to the current location information and receiving module of mobile terminal
The MME held has the location information of each base station under its command, starts to calculate mobile terminal at a distance from each base station；It is tied in timer timing
Beam post-processing module starts return LTE network test again.
Further, processing module, which is chosen, carries out return packet with the related cell frequency point of the nearest base station of distance of mobile terminal
Include: processing module all carries out returning to LTE network test to all subdistrict frequency points apart from nearest base station.
On the other hand, the present invention also provides a kind of systems for returning to LTE network based on position, comprising: MME, base station, and
Mobile terminal as described above；The MME is used to save the location information for having each base station under its command and related cell frequency point information, and
All information are handed down to mobile terminal by base station.
The utility model has the advantages that
Method, terminal and the system of the present invention that LTE network is returned based on position, by having MME under its command base station position
Confidence breath and the base station related cell frequency point information are saved in mobile terminal, when mobile terminal call terminates to return to former network,
It solves mobile terminal and is not received by after the information of LTE network subdistrict frequency point when returning by multilayer network selection mode to take a long time,
Can not be purposive carry out the problem of returning, by the location information of mobile terminal and peripheral base station measure mobile terminal week
The signal strength or weakness of base station is enclosed, the relevant subdistrict frequency point of optimum base station is chosen and returns to LTE network, shorten mobile terminal back to 4G
The time of network keeps user experience more preferable.
Detailed description of the invention
Fig. 1 is a kind of method flow diagram that LTE network is returned based on position that first embodiment of the invention provides；
Fig. 2 is a kind of mobile terminal framework figure that LTE network is returned based on position that second embodiment of the invention provides；
Fig. 3 is another mobile terminal framework figure that LTE network is returned based on position that second embodiment of the invention provides；
Fig. 4 is a kind of system structure diagram that LTE network is returned based on position that third embodiment of the invention provides.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawings and examples to this
Invention is described in further detail.
Embodiment one
As shown in Figure 1, the present invention provides a kind of method for returning to LTE network based on position, comprising:
Step S1:MME saves the location information and related cell frequency point information for having each base station under its command, and all information are led to
It crosses base station and is handed down to mobile terminal, saved by mobile terminal；
Step S2: after mobile terminal call, if not receiving the information for the LTE network subdistrict frequency point that RNC is issued,
Then mobile terminal has the location information of each base station under its command according to the MME of its current location information and preservation, calculates itself and each base
The distance stood；
Step S3: mobile terminal is returned according to the related cell frequency point that results of measuring is chosen therewith apart from nearest base station
LTE network test is returned, if return is unsuccessful, successively chooses distance therewith from closely to the related cell frequency of other remote base stations
Point carries out return trial, until returning successfully.
It is typically resident in LTE network Idle state or data service connected state using the 4G multimode card of the terminal of CSFB at present,
When there is voice service demand (caller or called), is fallen after rise by LTE network auxiliary to 2/3G network and establish voice service, led to
LTE network is returned again to after words
It converses the detailed process established are as follows: when mobile terminal has incoming call, caller MSC is to called MSC (Mobile
Switching Centre, mobile switching centre) call request is issued, called MS C issues paging to mobile terminal by MME and asks
It asks；It after mobile terminal receives the paging request of MME transmission, activates business request to MME transmission, MME is to eNB (evolved
Node B, the node B of evolution) it issues mobile terminal and falls cell instruction after rise, eNB is received after instruction the falling cell information of configuration
It is sent to mobile terminal, subsequent mobile terminal carries out falling cell measurement, measurement result is sent to eNB, eNB determines suitable
The information is sent to mobile terminal after falling cell, mobile terminal falls back to suitable cell；If the cell and connection that fall after rise
Cell ID when closing attachment is inconsistent, and mobile terminal carries out location updating first, and after the completion of location updating, mobile terminal is to quilt
It makes MSC send page response information, establishes call.After end of conversation, mobile terminal can return to LTE network, and general MSC passes through
RNC sends the information for returning to LTE network subdistrict frequency point to mobile terminal, according to LTE network subdistrict frequency point after mobile terminal reception
Back to LTE network, but if RNC is not configured LTE network subdistrict frequency point or is moved eventually due to wireless access signal
End is not received by the information of LTE network subdistrict frequency point, and mobile terminal from master mode or by 2G/3G/4G multilayer by selecting
Net mode returns to LTE network, and mobile terminal can just find suitable Target cell by repeatedly selection at this time, expends the time
It is longer, it is saved by the way that the base station position information of mobile terminal attachment and related cell frequency point information are sent to mobile terminal, it can
So that mobile terminal is when receiving the information of corresponding LTE network subdistrict frequency point, the closer base of purposive selected distance
The stronger Target cell of the cell stood, i.e. signal strength is returned, and mobile terminal is made quickly to return to LTE network, for LTE net
Network, corresponding 3 cells in a general base station, when choosing base station progress Target cell return LTE network, if the cell of selection
Return it is unsuccessful, can continue to select that all cells of the base station are attempted or selected it is therein it is several test,
Provided of course that one of cell of selection returns successfully, then it is returned directly to LTE network, has not needed attempted.
Further, after mobile terminal call further include:
Mobile terminal starts timer；If mobile terminal does not receive the LTE that RNC is issued yet after timer timing
The information of network cell frequency point, then mobile terminal has the position of each base station under its command according to the MME of its current location information and preservation
Information starts to calculate it at a distance from each base station.
When mobile terminal is by returning to LTE network from master mode or by 2G/3G/4G multilayer network selection mode, it can lead to
It crosses the subdistrict frequency point searched and carries out return trial, but generally require by repeatedly attempting to return, influence user and count
According to interactive service, by the way that timer is arranged, if mobile terminal also fails to receive RNC after the time that timer reaches setting
The information of the LTE network subdistrict frequency point issued then starts the distance for calculating mobile terminal and each base station, passes through the position with base station
The subdistrict frequency point for setting clearly to be returned, makes terminal quickly return to LTE network.
Further, after mobile terminal call further include:
Mobile terminal starts timer；While timer starts timing, mobile terminal is according to its current location information
The location information for having each base station under its command with the MME of preservation starts to calculate it at a distance from each base station；Terminate in timer timing
Mobile terminal starts return LTE network test again afterwards.
It begins to calculate mobile terminal while starting timer at a distance from each base station, can faster obtain
The related cell frequency point of best base station carries out return test.
Further, mobile terminal is chosen the related cell frequency point apart from nearest base station therewith according to results of measuring and is carried out
Return includes: that mobile terminal all carries out returning to LTE network test to all subdistrict frequency points apart from nearest base station.
After best base station has been determined, if the related cell frequency point all to its tests also failed return, select
The related cell frequency point for the base station for taking distance second close is returned, until successfully returning to former network.
Before MME is issued to mobile terminal and to be had base station position information and the base station related cell frequency point information under its command further include:
Mobile terminal starts the joint attachment flow of 4G multimode card, completes joint attachment.
CSFB operation flow mainly includes joint attachment, location updating, caller (MO) CSFB process, called (MT) CSFB stream
Journey and attachment removal etc..The attachment flow for enabling the user of CSFB function is based on joint GPRS (General Packet
Radio Service, General Packet Radio Service)/IMSI (International Mobile Subscriber
Identity, international mobile subscriber identity) attachment flow realizes.
Multimode list waits for that handheld terminal carries the instruction for supporting CSFB ability in the Attach Request message sent to MME.MME
After receiving the joint attach request of user, carrying out, EPS (Evolved Packet System, the grouping system of evolution) is attached
While, can derive VLR (the Visited Location in its correlation CS (Circuit Switched, circuit switching) domain
Register, VLR Visitor Location Register) information, and update and request to this VLR launch position, VLR receives position updating request
After, it can mark the user as having carried out EPS being attached to, and save the IP address of the MME of user, in this way, just creating in VLR
SGs (Serving General Packet Radio Service, the service general grouping nothing between the VLR of user and MME are built
Line service) association.Then, MSC Server/VLR will do it the domain CS location updating and the TMSI (Temporary user
Mobile Subscriber Identify, temporarily moved subscriber identification number) and LAI (Location Area Identify,
Location Area Identification) it is transmitted to MME, to establish SGs association in MME.Finally, TMSI that MME distributes VLR to user and
The information such as LAI are included in attach request received message and are sent to UE (User Equipment, user equipment), indicate that at this time
The joint attachment of user has succeeded.After joint is adhered to successfully, the user of CSFB ability is enabled in the lte networks
Processing circuit domain service.
After mobile terminal-opening, start the joint attachment flow of 4G multimode card, detailed process are as follows:
Mobile terminal 4G multimode card sends Attach Request message to MME；Wherein parameter Attach Type indicates this
It is a united EPS/IMSI attachment flow, and parameter instruction mobile terminal has CS Fallback ability；
MME sends SGsAP-LOCATION-UPDATE-REQUEST message to corresponding VLR, includes new in message
The parameters such as IMSI, MME name and Location Update Type of LAI, 4G multimode card；
VLR stores MME information, and creates and be associated with the SGs of 4G multimode card under MME, and VLR is according to user information and position area
Information initiates the 4G multimode card position more new technological process for arriving HLR；And confirmation message is returned to MME；
MME sends Attach Accept message to mobile terminal, completes joint attachment.
Embodiment two
As shown in Fig. 2, another originating party face according to the present invention, the present invention also provides one kind to return to LTE network based on position
Mobile terminal, comprising: receiving module 11, measurement module 12 and processing module 13；
Receiving module 11 is used to receive the location information for having each base station under its command and the base station related cell frequency point of MME preservation
Information simultaneously saves, and receives the information for the LTE network subdistrict frequency point that RNC is issued；
Measurement module 12 is used for after mobile terminal call, and receiving module 11 does not receive the LTE network that RNC is issued
In the case where the information of subdistrict frequency point, had under its command according to the MME that mobile terminal current location information and receiving module 11 save each
The location information of base station calculates mobile terminal at a distance from each base station；
Processing module 13 is used to be chosen and the nearest base station of distance of mobile terminal according to the results of measuring of measurement module 12
Related cell frequency point carries out return test, if return is unsuccessful, successively chooses and distance of mobile terminal is from closely to remote its
He carries out return trial by the related cell frequency point of base station, until returning successfully.
Further, as shown in figure 3, the mobile terminal further includes timer 14；
The timer is used to start timing after mobile terminal call；
If receiving module does not receive the information for the LTE network subdistrict frequency point that RNC is issued yet after timer timing,
Then measurement module 12 is believed according to the position that the MME that the current location information and receiving module of mobile terminal are kept has each base station under its command
Breath starts to calculate mobile terminal at a distance from each base station.
Further, the mobile terminal further includes timer 14；
The timer 14 is used to start timing after mobile terminal call；
While timer 14 starts timing, measurement module 12 is according to the current location information of mobile terminal and receives mould
The MME that block 11 is kept has the location information of each base station under its command, starts to calculate mobile terminal at a distance from each base station；In timer
14 timings terminate post-processing module 13 and start return LTE network test.
Certainly, as described in embodiment one, measurement module is chosen according to program can start in timing or timing is tied
The distance exam of mobile terminal and each base station is carried out after beam.
Further, processing module, which is chosen, carries out return packet with the related cell frequency point of the nearest base station of distance of mobile terminal
Include: processing module 13 all carries out returning to LTE network test to all subdistrict frequency points apart from nearest base station.
If returning to the unsuccessful subdistrict frequency point for choosing other base stations again to be attempted.
Further, mobile terminal further includes attachable module；
The attachable module be used for receiving module 11 receive that MME saves to have base station position information under its command related to the base station
The 4G multimode card of mobile terminal is completed into joint attachment before subdistrict frequency point information.
Embodiment three
As shown in figure 4, on the other hand, a kind of method that LTE network is returned to based on position based on embodiment one, the present invention
Also provide a kind of system that LTE network is returned to based on position, comprising: MME3, base station 2, and mobile terminal 1 as described above；
The MME3 is used to save the location information for having each base station 2 under its command and the base station related cell frequency point information, and by all information
Mobile terminal 1 is handed down to by base station.
Mobile terminal 1 receives having 2 location information of base station and the base station related cell frequency point information under its command and protecting for MME3 preservation
It deposits；And after terminating call, if the information for the LTE network subdistrict frequency point that RNC is issued is not received, according to its current location
Information and the MME3 of preservation have the location information of each base station 2 under its command, calculate terminal at a distance from each base station 2；In distance exam
After the completion, the related cell frequency point for choosing nearest base station 2 with a distance from mobile terminal 1 is returned, if return is unsuccessful,
Successively selected distance carries out return trial from the related cell frequency point closely to other remote base stations 2, until returning successfully.
Those skilled in the art can be understood that, for convenience and simplicity of description, only with above-mentioned each functional module
Division progress for example, in practical application, can according to need and above-mentioned function distribution is complete by different functional modules
At the internal structure of terminal being divided into different functional modules, to complete all or part of the functions described above.On
The terminal of description and the specific work process of system are stated, can refer to corresponding processes in the foregoing method embodiment, herein no longer
It repeats
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a kind of method for returning to LTE network based on position characterized by comprising
MME saves the location information and related cell frequency point information for having each base station under its command, and all information are issued by base station
To mobile terminal, saved by mobile terminal；
After mobile terminal call, if not receiving the information for the LTE network subdistrict frequency point that RNC is issued, mobile terminal
The location information for having each base station under its command according to the MME of its current location information and preservation calculates it at a distance from each base station；
Mobile terminal chooses the related cell frequency point therewith apart from nearest base station according to results of measuring and carries out returning to LTE network survey
Examination, if return is unsuccessful, successively chooses distance therewith and is returned from the related cell frequency point closely to other remote base stations
It attempts, until returning successfully.
2. the method according to claim 1 for returning to LTE network based on position, which is characterized in that in mobile terminal call
After further include:
Mobile terminal starts timer；If mobile terminal does not receive the LTE network that RNC is issued yet after timer timing
The information of subdistrict frequency point, then mobile terminal has the location information of each base station under its command according to the MME of its current location information and preservation,
Start to calculate it at a distance from each base station.
3. the method according to claim 1 for returning to LTE network based on position, which is characterized in that in mobile terminal call
After further include:
Mobile terminal starts timer；While timer starts timing, mobile terminal is according to its current location information and guarantor
The MME deposited has the location information of each base station under its command, starts to calculate it at a distance from each base station；Terminate to move back in timer timing
Dynamic terminal starts return LTE network test again.
4. the method according to any one of claim 1-3 for returning to LTE network based on position, which is characterized in that mobile
It includes: mobile terminal to this that terminal is chosen the related cell frequency point therewith apart from nearest base station and return according to results of measuring
All subdistrict frequency points apart from nearest base station all carry out returning to LTE network test.
5. a kind of mobile terminal for returning to LTE network based on position characterized by comprising receiving module, measurement module and place
Manage module；
Receiving module is used to receive the location information for having each base station under its command that MME is saved and related cell frequency point information and saves,
And receive the information for the LTE network subdistrict frequency point that RNC is issued；
Measurement module is used for after mobile terminal call, and receiving module does not receive the LTE network subdistrict frequency point that RNC is issued
Information in the case where, have the position of each base station under its command according to the MME that mobile terminal current location information and receiving module save
Information calculates mobile terminal at a distance from each base station；
Processing module is used to choose the related cell with the nearest base station of distance of mobile terminal according to the results of measuring of measurement module
Frequency point carries out return test, if return is unsuccessful, successively chooses and distance of mobile terminal is from closely to other remote base stations
Related cell frequency point carries out return trial, until returning successfully.
6. the mobile terminal according to claim 5 for returning to LTE network based on position, which is characterized in that described mobile whole
End further includes timer；
The timer is used to start timing after mobile terminal call；
If receiving module does not receive the information for the LTE network subdistrict frequency point that RNC is issued yet after timer timing, survey
Amount module has the location information of each base station under its command according to the MME that the current location information and receiving module of mobile terminal are kept, and opens
Measuring and calculating mobile terminal begin at a distance from each base station.
7. the mobile terminal according to claim 5 for returning to LTE network based on position, which is characterized in that described mobile whole
End further includes timer；
The timer is used to start timing after mobile terminal call；
While timer starts timing, measurement module is kept according to the current location information and receiving module of mobile terminal
MME has the location information of each base station under its command, starts to calculate mobile terminal at a distance from each base station；After timer timing
Processing module starts return LTE network test again.
8. the mobile terminal of LTE network is returned based on position according to any one of claim 5-7, which is characterized in that
Processing module is chosen and return with the related cell frequency point of the nearest base station of distance of mobile terminal include: processing module to this away from
All subdistrict frequency points from nearest base station all carry out returning to LTE network test.
9. a kind of system for returning to LTE network based on position characterized by comprising MME, base station, and such as claim 5-
Mobile terminal described in any one of 8；The MME is for saving the location information for having each base station under its command and related cell frequency point letter
Breath, and all information are handed down to mobile terminal by base station.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112333789A (en) * | 2020-11-16 | 2021-02-05 | 中国联合网络通信集团有限公司 | Calling method, calling device and terminal |
| CN113194521A (en) * | 2021-03-29 | 2021-07-30 | 深圳市广和通无线股份有限公司 | 5G communication module network searching method and device, computer equipment and storage medium |
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