CN105578544B - A kind of method and terminal device of circuit domain exchange falling - Google Patents
A kind of method and terminal device of circuit domain exchange falling Download PDFInfo
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- CN105578544B CN105578544B CN201510970766.7A CN201510970766A CN105578544B CN 105578544 B CN105578544 B CN 105578544B CN 201510970766 A CN201510970766 A CN 201510970766A CN 105578544 B CN105578544 B CN 105578544B
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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
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/165—Performing reselection for specific purposes for reducing network power consumption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/19—Connection re-establishment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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Abstract
The method and terminal device for falling CSFB after rise are exchanged the embodiment of the invention discloses a kind of circuit domain, can be shortened during CSFB without the search time for specifying the frequency point in the case where frequency point.The method comprise the steps that searching for frequency point of the third communication standard relative to the adjacent area of the first communication standard when terminal falls back to the second communication standard from the first communication standard and fails；If the frequency point of the adjacent area can be resident, terminal is resided on the frequency point of adjacent area.To select failure in the frequency point of the second communication standard, in the case that no network specifies target frequency point, adjacent area frequency point of the first search third communication standard relative to the first communication standard, frequency point search time without attempting to search for all frequency points, when so as to shorten during CSFB without specified frequency point.
Description
Technical field
The method and terminal device fallen after rise the present invention relates to wireless communication field more particularly to a kind of exchange of circuit domain.
Background technique
Long Term Evolution (Long Term Evolution, LTE) terminal LTE network initiate voice service, after due to
The exchange of a variety of causes circuit domain such as covering, capacity, strategy falls (Circuit Switched Fallback, CSFB) after rise and arrives 2G's
The general shifting of global system for mobile communications (Global System for Mobile Communication, GSM) network or 3G
Dynamic communication system (Universal Mobile Telecommunications System, UMTS) network.For example, LTE network
Cover not good enough or for being LTE VOIP voice communication IP multimedia subsystem (IP Multimedia Subsystem,
IMS) construction is not perfect, cannot achieve LTE voice communication, voice service can only be passed through CSFB shape when needing to make a phone call
Formula retracts online to 2G/3G.General described rollback essence is terminal in internetwork switching.
But network can only once specify the frequency point of a standard, after a standard frequency point selection failure, it is also necessary to taste
Another standard is tried to improve the success rate of voice.The target frequency point that another New Schemes at this time have been specified without network leads to
Cross search find time of available frequency point can be long.
Summary of the invention
The method and terminal device fallen after rise the embodiment of the invention provides a kind of exchange of circuit domain, can shorten CSFB process
The search time of target frequency point in the case where the specified frequency point of middle nothing.
In a first aspect, the embodiment of the invention provides the methods that a kind of exchange of circuit domain is fallen after rise, comprising:
When terminal, which falls back to the second communication standard from the first communication standard, to fail, search third communication standard is relative to the
The frequency point of the adjacent area of one communication standard；
If the frequency point of adjacent area can be resident, terminal is resided on the frequency point of adjacent area.
In the embodiment of the present invention, when terminal, which falls back to the second communication standard from the first communication standard, to fail, third is searched for
Frequency point of the communication standard relative to the adjacent area of the first communication standard；If the frequency point of the adjacent area can be resident, terminal is resided in
On the frequency point of adjacent area.Thus in the case where the frequency point selection failure of the second communication standard specifies target frequency point without network, preferentially
Adjacent area frequency point of the third communication standard relative to the first communication standard is searched for, searches for all frequency points without attempting, thus
Frequency point search time when during shortening CSFB without specified frequency point.
With reference to first aspect, in the first possible implementation of the first aspect, this method further include: if adjacent area
Frequency point cannot be resident, then in search terminal stored third communication standard history frequency point；If history frequency point can be resident,
It then resides on history frequency point.
In this way, not being the frequency of all third communication standards of direct search in the case where adjacent area frequency point cannot be resident
Point, but first search history frequency point, frequency point search time when so as to shorten during CSFB without specified frequency point.
The possible implementation of with reference to first aspect the first, in second of possible implementation of aspect,
This method further include: if history frequency point cannot be resident, search for all frequencies under third communication standard in addition to history frequency point
Point, can be resident if any suitable frequency point, then resides on suitable frequency point.
In this way, be not required to repeat the history frequency point searched for, during further shortening CSFB
Search process when without specified frequency point.
With reference to first aspect, the first possible implementation of first aspect is into second of possible implementation
Any possible implementation, in a third possible implementation of the first aspect, the first communication standard are to drill for a long time
Into technology LTE, the second communication standard is Universal Mobile Communication System UMTS (3G) network, and third communication standard is that the whole world is mobile logical
Letter system GSM (2G) network.
With reference to first aspect, the first possible implementation of first aspect is into second of possible implementation
Any possible implementation, in a fourth possible implementation of the first aspect, the first communication standard are to drill for a long time
Into technology LTE, the second communication standard is UMTS (3G) network, and third communication standard is GSM (2G) network.
Second aspect, the embodiment of the invention provides a kind of terminal devices, comprising:
Search module, for searching for third communication system when falling back to the failure of the second communication standard from the first communication standard
Frequency point of the formula relative to the adjacent area of the first communication standard；
Resident module, for when the frequency point of adjacent area can be resident, then residing on the frequency point of adjacent area.
In conjunction with second aspect, in the first possible implementation of the second aspect, search module is also used to work as adjacent area
Frequency point when cannot be resident, search for the history frequency point of stored third communication standard；
Resident module, is also used to then reside on history frequency point when history frequency point can be resident.
In conjunction with the first possible implementation of second aspect, in second of possible implementation of aspect,
Search module is also used to when history frequency point cannot be resident, and is searched for all in addition to history frequency point under third communication standard
Frequency point is resident module, is also used to then reside on suitable frequency point when search module searches suitable frequency point.
In conjunction with second aspect, the possible implementation of the first of second aspect is into second of possible implementation
Any possible implementation, in the third possible implementation of the second aspect, search module, be specifically used for when from
When Long Term Evolution LTE falls back to global system for mobile communications GSM (2G) failure, Universal Mobile Communication System UMTS is searched for
The frequency point of (3G) relative to the adjacent area of LTE；
Resident module, is specifically used for when UMTS (3G) can be resident relative to the frequency point of the adjacent area of LTE, then resides in neighbour
On the frequency point in area.
In conjunction with second aspect, the possible implementation of the first of second aspect is into second of possible implementation
Any possible implementation, in the fourth possible implementation of the second aspect, search module, be specifically used for when from
When Long Term Evolution LTE falls back to UMTS (3G) failure, the frequency point of GSM (2G) relative to the adjacent area of LTE is searched for；
Resident module, is specifically used for when GSM (2G) can be resident relative to the frequency point of the adjacent area of LTE, then resides in neighbour
On the frequency point in area.
The third aspect, the embodiment of the invention provides a kind of terminal devices characterized by comprising
Memory and processor, in which:
Memory is for storing application program；Processor is for executing application to be used for:
When falling back to the failure of the second communication standard from the first communication standard, search third communication standard is logical relative to first
Believe the frequency point of the adjacent area of standard；If the frequency point of adjacent area can be resident, reside on the frequency point of adjacent area.
In conjunction with the third aspect, in the first possible implementation of the third aspect, memory is also used to store history
Frequency point；Processor is also used to when the frequency point of adjacent area cannot be resident, stored third communication standard in searching storage
History frequency point；If history frequency point can be resident, reside on history frequency point.
In conjunction with the first possible implementation of the third aspect, in second of possible implementation of aspect,
Processor is also used to when history frequency point cannot be resident, and searches for all frequencies under third communication standard in addition to history frequency point
Point then resides on suitable frequency point when search module searches suitable frequency point.
In conjunction with the third aspect, the possible implementation of the first of the third aspect is into second of possible implementation
Any possible implementation, in the third possible implementation of the third aspect, processor is specifically used for working as from length
When phase evolution technology LTE network falls back to global system for mobile communications GSM (2G) network failure, Universal Mobile Communication System is searched for
Frequency point of UMTS (3G) network relative to the adjacent area of LTE network；When UMTS (3G) network can be with relative to the frequency point of the adjacent area of LTE
When resident, then reside on the frequency point of adjacent area.
In conjunction with the third aspect, the possible implementation of the first of the third aspect is into second of possible implementation
Any possible implementation, in the fourth possible implementation of the third aspect, processor, be specifically used for when from
When LTE network falls back to UMTS (3G) network failure, frequency point of GSM (2G) network relative to the adjacent area of LTE network is searched for；When
When GSM (2G) network can be resident relative to the frequency point of the adjacent area of LTE network, then reside on the frequency point of adjacent area.
Fourth aspect, the embodiment of the invention provides a kind of computer storage medium, which has program, the program
It include some or all of step in the method for first aspect when execution.
As can be seen from the above technical solutions, the scheme of the embodiment of the present invention has the following beneficial effects:
It is not direct when terminal, which falls back to the second communication standard from the first communication standard, to fail in the embodiment of the present invention
Search history frequency point, but search for frequency point of the third communication standard relative to the adjacent area of the first communication standard；If the frequency of the adjacent area
When point can be resident, then terminal resides on the frequency point of adjacent area.To select failure, no network in the frequency point of the second communication standard
In the case where specified target frequency point, adjacent area frequency point of the first search third communication standard relative to the first communication standard, thus nothing
It need to attempt to search for all frequency points, frequency point search time when so as to shorten during CSFB without specified frequency point.
Detailed description of the invention
Fig. 1 is a kind of flow chart that circuit domain exchanges drop method in the embodiment of the present invention；
Fig. 2 is interaction diagrams when CSFB is to 3G network under LTE network in the embodiment of the present invention；
Fig. 3 is the interaction diagrams in the embodiment of the present invention under LTE network when CSFB to 2G network；
Fig. 4 is the functional block diagram of terminal device in the embodiment of the present invention；
Fig. 5 is the hardware structural diagram of terminal device in the embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
Description and claims of this specification and term " first ", " second ", " third " " in above-mentioned attached drawing
The (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manage
The data that solution uses in this way are interchangeable under appropriate circumstances, so that the embodiments described herein can be in addition to illustrating herein
Or the sequence other than the content of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that
Cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units need not limit
In step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, produce
The other step or units of product or equipment inherently.
Terminal involved in the application, i.e. user equipment (User Equipment, UE), can be wireless terminal can also be with
It is catv terminal, wireless terminal can be directed to user and provide the equipment of voice and/or data connectivity, have and be wirelessly connected function
The handheld device of energy or other processing equipments for being connected to radio modem.Wireless terminal can be through wireless access network
(Radio Access Network, RAN) is communicated with one or more core nets, and wireless terminal can be mobile terminal,
Such as mobile phone (or be " honeycomb " phone) and the computer with mobile terminal, for example, it may be portable, pocket,
Hand-held, built-in computer or vehicle-mounted mobile device, they exchange language and/or data with wireless access network.For example,
Personal communication service (Personal Communication Service, PCS) phone, wireless phone, Session initiation Protocol
(SIP) phone, wireless local loop (Wireless Local Loop, WLL) are stood, personal digital assistant
Equipment such as (PersonalDigital Assistant, PDA).Wireless terminal is referred to as system, subscriber unit
(Subscriber Unit), subscriber station (Subscriber Station), movement station (Mobile Station), mobile station
(Mobile), distant station (RemoteStation), access point (Access Point), remote terminal (Remote
Terminal), access terminal (AccessTerminal), user terminal (User Terminal), user agent (User
Agent), user equipment (User Device) or user equipment (User Equipment).
Circuit domain dropping CSFB, be in order to enable terminal LTE access under can initiate the CS business such as voice service, and
Receive the paging of the CS business such as voice, and can ongoing PS business carries out correctly in the lte networks to terminal
Processing, produces CSFB technology.Practical is exactly that audio call is switched to 2G or 3G network.
At construction TD-LTE network initial stage, if there has been mature UMTS Terrestrial radio access network (UMTS in operator
Terrestrial Radio Access Network, UTRAN)/gsm wireless access network (GSM EDGE Radio Access
Network, GERAN) network, for the protection invested to CS, in conjunction with the deployment strategy of TD-LTE network, operator can be used
The original domain CS voice scheme provides voice service, and TD-LTE network only handles data service (including IMS data service).
In this case, using CSFB technology, i.e. for UE under LTE covering when handling voice service, terminal first return back to CS (circuit
Domain) network, in CS network processes voice service；Thus reach the existing domain the CS equipment of reuse to come in TD-LTE network
User provides the purpose of traditional voice service.
But the use of CSFB has precondition, that is, only in the UMTS Terrestrial radio access network of evolution
(Evolved UMTS Terrestrial Radio Access Network, E-UTRAN) is covered with the overlapping of UTRAN/GERAN
Cover area, and when user has the function of CSFB, circuit domain dropping could be used.
The present invention relates to LTE network, 3G network and 2G networks, specifically fall back to 3G network 2G network by LTE network.Under
Face describes wireless network architecture by taking LTE network as an example.
Wireless network architecture may include several enode eNB and other network entities.ENB can be and user equipment
The base station of device (UE) communication and base station, node B, access point can be referred to as etc..Each eNB can be provided for specific
The communication overlay of geographic area.In 3 gpp, term " cell " also refers to the overlay area of eNB and/or services this to cover
The overlay area of the eNB subsystem of cover area, this depends on the context using term.
ENB can provide the communication for macrocell, picocell, Femto cell and/or other types of cell and cover
Lid.Macrocell can cover relatively large geographic area (such as several kms of radius) and can permit the UE with service subscription
Unrestricted access.Picocell can cover relatively small geographic area and can permit the UE with service subscription
Unrestricted access.Femto cell can cover relatively small geographic area (for example, family) and can permit with
The associated UE in Femto cell (for example, UE in closed subscriber group (CSG), for UE of the user in family etc.)
Restricted access.Macro eNB (i.e. macro base station) can be referred to as the eNB of macrocell.It can be with for the eNB of picocell
Referred to as pico- eNB (i.e. femto base station).Femto eNB (i.e. femto base can be referred to as the eNB of Femto cell
Stand) or family eNB.ENB can support one or more (such as three) cells.
Wireless network can also include relay station.Relay station be from upstream station (such as eNB or UE) receive data and/or its
The station of the transmission of its information and the transmission to dirty station (such as UE or eNB) transmission data and/or other information.Relay station is also
It can be the UE relayed to the transmission for other UE.Relay station is also referred to as relaying eNB, repeater etc..
Wireless network can be including the different types of eNB's such as example macro eNB, pico- eNB, femto eNB, repeater
Heterogeneous network (HerNet).These different types of eNB can have different transmitted power levels, difference in the wireless network
Overlay area and Different Effects to interference.For example, macro eNB is pico- with high transmitted power level (such as 20W)
ENB, femto eNB and repeater have lower transmitted power level (such as 1W).
It further include network controller in wireless network, it may be coupled to the set of eNB and provides coordination for these eNB
And control.Network controller can be communicated via backhaul with eNB.ENB for example can also be returned either directly or indirectly via wireless
Journey or wire-line back haul are communicated each other.
The detailed process of a kind of CSFB of the prior art are as follows: terminal is under LTE network to mobile management entity (Mobility
Management Entity, MME) initiate voice service caller when, usually LTE base station to MME send expansion service request
(Extended Service Request), so that MME knows that terminal will carry out CS business, instruction terminal is fallen back to MME in turn
2G/3G network initiates to access after terminal falls back to 2G/3G to mobile switching centre (Mobile Switch Center, MSC)
Request according to the priority of user and the system loading state of itself is decided whether that UE is allowed to initiate CS business by MSC.
Specifically, MME can fall back to 2G network with instruction terminal, if terminal falls GERAN after rise, failure (is referred specifically to search for or be stayed
The network failure of the standard is stayed, any frequency point therein or cell cannot be resident), at this point, terminal specifies frequency point in no network
In the case where attempt search 3G network, i.e. when UTRAN, then the history frequency point for attempting search storage preferential first is attempted all
Frequency point.
Optionally, MME can also fall back to 3G network according to specific network condition instruction terminal, if terminal falls UTRAN after rise
Failure (searching for the network failure of the standard, cannot be resident any frequency point therein or cell), terminal is in the specified frequency of no network
Search 2G network is attempted in the case where point, i.e. when GERAN, then the history frequency point for attempting search storage preferential first attempts institute
Some frequency points.
In this way, in the case where terminal specifies frequency point without network, since history frequency point is saved at GERAN and UTRAN
, real-time is poor, a new region is such as moved at LTE, it is slow that CSFB to GERAN and UTRAN search net spee.
Fig. 1 is the method flow diagram of the circuit domain exchange falling CSFB in the embodiment of the present invention.
101, when terminal, which falls back to the second communication standard from the first communication standard, to fail, search third communication standard is opposite
Frequency point in the adjacent area of the first communication standard；
As a kind of implementation, the first communication standard is LTE network, and the second communication standard is 2G network, the third communication
Standard is 3G network.
As another implementation, the first communication standard is LTE network, and the second communication standard is 3G network, and third is logical
Letter standard is 2G network.
Specifically, it is not good enough to cover in LTE network as a kind of implementation, or the construction of the IMS as LTE is not perfect
Etc. it cannot achieve LTE voice communication in the case where, terminal initiates voice service calling to MME under LTE network, and MME knows end
End will carry out CS business, and instruction terminal falls back to 2G or 3G network to MME in turn,
After instruction terminal falls back to 2G network, failure is fallen after rise, then adjacent area of the terminal searching 2G network relative to LTE network
Frequency point.
After instruction terminal falls back to 3G network, failure is fallen after rise, then adjacent area of the terminal searching 3G network relative to LTE network
Frequency point.
It should be noted that terminal is fallen back to, the reason of 2G or 3G network fail, is a variety of, such as: it can be the net fallen after rise extremely
The failure of falling caused by network loading problem.
If 102, the frequency point of the adjacent area can be resident, terminal is resided on the frequency point of adjacent area.
When terminal searching be frequency point of the 2G network relative to the adjacent area of LTE network when, if searching corresponding frequency point, when
When the frequency point can be resident, then terminal resides on the frequency point.
When terminal searching be frequency point of the 3G network relative to the adjacent area of LTE network when, if searching corresponding frequency point, when
When the frequency point can be resident, then terminal resides on the frequency point.
Specifically, being that whether there is or not suitable cells for the corresponding frequency point of detection, if detecting after terminal searching to corresponding frequency point
Suitable cell, then terminal can select the cell and is resident.
Optionally, if terminal searching is to multiple adjacent area frequency points, terminal will do it power measurement, preferential to select power maximum
Frequency point detected.
In the embodiment of the present invention, when terminal, which falls back to the second communication standard from the first communication standard, to fail, third is searched for
Frequency point of the communication standard relative to the adjacent area of the first communication standard；If the frequency point of the adjacent area can be resident, terminal is resided in
On the frequency point of adjacent area.Thus in the case where the frequency point selection failure of the second communication standard specifies target frequency point without network, preferentially
Adjacent area frequency point of the third communication standard relative to the first communication standard is searched for, searches for all frequency points without attempting, thus
Frequency point search time when during shortening CSFB without specified frequency point.
Preferably, if the frequency point of the adjacent area cannot be resident, i.e., the corresponding frequency point in the adjacent area is not found suitably
When cell is resident, then in search terminal stored third communication standard history frequency point.If the history frequency point can be with
It is resident, i.e., when the history frequency point detects that suitable cell is resident, then the cell of the history frequency point is selected to be resident.
If the history frequency point cannot be resident, all frequency points of the third communication standard are searched for.
Preferably, when searching for all frequency points of third communication standard, the history frequency point searched for is not repeated.
Wherein, history frequency point saves the cell and frequency point information itself be resident by terminal, such as: terminal is nearest
8 resident frequency point informations are stored as history frequency point information.
Below with reference to Fig. 2, after falling back to 2G failure to terminal in the embodiment of the present invention, attempt search 3G network relative to
The case where adjacent area frequency point of LTE network, is introduced.
201, UE (i.e. terminal) is in the resident progress data communication of LTE cell；
202, UE is in LTE cell (Cell) initiating speech conversation；
203, the negotiation that CSFB is carried out between LTE and GSM (2G) prepares, including described in embodiment shown in FIG. 1
CSFB process, such as: LTE base station sends expansion service request to MME so that MME knows terminal and to carry out CS business, MME into
And instruction terminal falls back to 2G network.
204, terminal is from LTE cell CSFB to GSM cell；
205, since the problems such as load of GSM cell causes terminal in the resident failure of GSM cell；
206, terminal is attempted from LTE cell CSFB to UTRAN cell (3G cell)；
207, the adjacent area UTRAN (3G) frequency point under terminal first search LTE, when searching suitable adjacent area frequency point, then
It resides on the adjacent area frequency point；If not searching suitable adjacent area frequency point, UTRAN (3G) history frequency of terminal preservation is searched for
Point；If not searching suitable frequency point yet, all UTRAN (3G) frequency point in addition to the history frequency point searched for is searched for, when
It is then resident when searching suitable frequency point.
208, terminal CSFB success；
209, terminal is in UTRAN (3G) cell initiating speech conversation.
Therefore, the embodiment of the present invention can be in the case where no network specifies frequency point, CSFB to UTRAN (3G under LTE network
Network) when, it is preferential to attempt UTRAN (3G network) adjacent area frequency point under search LTE.So as to the case where no network specifies frequency point
Under, shorten frequency point search time.
It is similar with embodiment shown in Fig. 2, below with reference to Fig. 3, after falling back to 3G failure to terminal in the embodiment of the present invention,
The case where attempting adjacent area frequency point of the search 2G network relative to LTE network is introduced.
301, UE (i.e. terminal) is in the resident progress data communication of LTE cell；
302, UE is in LTE cell (Cell) initiating speech conversation；
303, the negotiation that CSFB is carried out between LTE and UTRAN (3G) prepares, including described in embodiment shown in FIG. 1
CSFB process, such as: LTE base station sends expansion service request to MME so that MME knows terminal and to carry out CS business, MME into
And instruction terminal falls back to 3G network.
304, terminal is from LTE cell CSFB to UTRAN (3G) cell；
305, since the problems such as load of UTRAN cell causes terminal in the resident failure of UTRAN (3G) cell；
306, terminal is attempted from LTE cell CSFB to GSM cell (2G cell)；
307, the adjacent area GSM (2G) frequency point under terminal first search LTE is then stayed when searching suitable adjacent area frequency point
It stays on the adjacent area frequency point；If not searching suitable adjacent area frequency point, GSM (2G) history frequency point of terminal preservation is searched for；
If not searching suitable frequency point yet, all GSM (2G) frequency point in addition to the history frequency point searched for is searched for, when searching
It is then resident when suitable frequency point.
308, terminal CSFB success；
309, terminal is in GSM (2G) cell initiating speech conversation.
Therefore, the embodiment of the present invention can be in the case where no network specifies frequency point, CSFB to GSM (2G net under LTE network
Network) when, it is preferential to attempt GSM (2G network) adjacent area frequency point under search LTE.So as in the case where no network specifies frequency point,
Shorten frequency point search time.
It is that the introduction that the method for CSFB carries out is fallen after rise to the circuit domain exchange in the embodiment of the present invention above, below from function
The terminal in the embodiment of the present invention is introduced in modular structure angle.
In conjunction with Fig. 4, the embodiment of the invention provides a kind of terminal devices 4, comprising:
Search module 401, for searching for the third communication when falling back to the failure of the second communication standard from the first communication standard
Frequency point of the standard relative to the adjacent area of the first communication standard；
Resident module 402, for when the frequency point of adjacent area can be resident, then residing on the frequency point of adjacent area.
In some specific implementations, search module 401 is also used to when the frequency point of adjacent area cannot be resident, and search is
The history frequency point of the third communication standard of storage；Resident module 402, is also used to then reside in when history frequency point can be resident
On history frequency point.
In some specific implementations, search module 401 is also used to when history frequency point cannot be resident, and searches for third
All frequency points under communication standard in addition to history frequency point, can be resident if any suitable frequency point, then reside in suitable frequency point
On.
In some specific implementations, search module 401 falls back to the whole world specifically for working as from Long Term Evolution LTE
When mobile communication system GSM (2G) failure, the frequency point of Universal Mobile Communication System UMTS (3G) relative to the adjacent area of LTE is searched for；
Resident module 402, is specifically used for when UMTS (3G) can be resident relative to the frequency point of the adjacent area of LTE, then resides in UMTS
On the frequency point of (3G) relative to the adjacent area of LTE.
In some specific implementations, search module 401 falls back to UMTS specifically for working as from Long Term Evolution LTE
When (3G) failure, the frequency point of GSM (2G) relative to the adjacent area of LTE is searched for；Resident module 402 is specifically used for when GSM (2G) is opposite
When frequency point in the adjacent area of LTE can be resident, then reside on frequency point of the GSM (2G) relative to the adjacent area of LTE.
In the embodiment of the present invention, when terminal, which falls back to the second communication standard from the first communication standard, to fail, search module
401 do not directly search history frequency point, search for frequency point of the third communication standard relative to the adjacent area of the first communication standard；If
When the frequency point of the adjacent area can be resident, then it is resident module 402 and resides on the frequency point of adjacent area.To in the frequency of the second communication standard
Point selection failure, in the case that no network specifies target frequency point, first search third communication standard is relative to the first communication standard
Adjacent area frequency point, search for all frequency point without attempting, so as to shorten during CSFB without specifying frequency point when frequency point to search
The rope time.
Fig. 5 is another structural schematic diagram of the terminal of that embodiment of the invention equipment 5.The terminal device includes at least: memory
501 and processor 502, in which:
Memory 501 may include read-only memory and random access memory, and provide instruction sum number to processor 502
According to a part of of memory 501 can also be including that may include high-speed random access memory (RAM, Random Access
Memory), it is also possible to further include non-labile memory (non-volatile memory).
Memory 501 stores following element, executable modules or data structures perhaps their subset or
Their superset:
Operational order: including various operational orders, for realizing various operations.
Operating system: including various system programs, for realizing various basic businesses and the hardware based task of processing.
In embodiments of the present invention, operational order (operational order that processor 502 is stored by calling memory 501
It is storable in operating system), it performs the following operations:
When falling back to the failure of the second communication standard from the first communication standard, search third communication standard is logical relative to first
Believe the frequency point of the adjacent area of standard；If the frequency point of adjacent area can be resident, reside on the frequency point of adjacent area.
In addition, processor 502 is also used to execute all or part of the steps in embodiment of the method shown in FIG. 1, it is specific this
Place repeats no more.
Terminal device 4 and 5 in the embodiment of the present invention is in practical applications foregoing user equipment, can be nothing
Line terminal is also possible to catv terminal, which has functional module shown in Fig. 4 or structure shown in fig. 5.Wherein, wireless whole
End can be communicated through wireless access network (for example, RAN, Radio Access Network) with one or more core nets,
Wireless terminal can be mobile terminal, such as mobile phone (or be " honeycomb " phone) and the computer with mobile terminal, example
Such as, can be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they and wireless access network
Exchange language and/or data.Specifically, it is not repeated herein.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (14)
1. a kind of method that circuit domain exchange is fallen after rise characterized by comprising
When terminal, which falls back to the second communication standard from the first communication standard, to fail, search third communication standard is logical relative to first
Believe the frequency point of the adjacent area of standard；
If the frequency point of the adjacent area can be resident, the terminal is resided on the frequency point of the adjacent area.
2. the method according to claim 1, wherein the method also includes:
If the frequency point of the adjacent area cannot be resident, the history frequency of the stored third communication standard in search terminal
Point；
If the history frequency point can be resident, reside on the history frequency point.
3. according to the method described in claim 2, it is characterized in that, the method also includes:
If the history frequency point cannot be resident, search for all in addition to the history frequency point under the third communication standard
Frequency point.
4. according to the method in any one of claims 1 to 3, it is characterised in that:
First communication standard is Long Term Evolution LTE, and second communication standard is Universal Mobile Communication System UMTS
(3G) network, the third communication standard are global system for mobile communications GSM (2G) network.
5. a kind of terminal device characterized by comprising
Search module, for searching for third communication standard phase when falling back to the failure of the second communication standard from the first communication standard
For the frequency point of the adjacent area of the first communication standard；
Resident module, for when the frequency point of the adjacent area can be resident, then residing on the frequency point of the adjacent area.
6. terminal device according to claim 5, it is characterised in that:
Described search module is also used to when the frequency point of the adjacent area cannot be resident, and searches for the stored third communication
The history frequency point of standard；
The resident module is also used to then reside on the history frequency point when the history frequency point can be resident.
7. terminal device according to claim 6, it is characterised in that:
Described search module is also used to when the history frequency point cannot be resident, and is searched under the third communication standard except institute
State all frequency points except history frequency point.
8. terminal device according to any one of claims 5 to 7, it is characterised in that:
Described search module falls back to global system for mobile communications GSM (2G) failure specifically for working as from Long Term Evolution LTE
When, search for the frequency point of Universal Mobile Communication System UMTS (3G) relative to the adjacent area of LTE；
The resident module is specifically used for when the UMTS (3G) can be resident relative to the frequency point of the adjacent area of LTE, is then resident
On the frequency point of the adjacent area.
9. terminal device according to any one of claims 5 to 7, it is characterised in that:
Described search module, specifically for searching for GSM (2G) when falling back to UMTS (3G) failure from Long Term Evolution LTE
The frequency point of adjacent area relative to LTE；
The resident module is specifically used for when the GSM (2G) can be resident relative to the frequency point of the adjacent area of LTE, is then resident
On the frequency point of the adjacent area.
10. a kind of terminal device characterized by comprising
Memory and processor, in which:
The memory is for storing application program；The processor is for executing the application program to be used for:
When falling back to the failure of the second communication standard from the first communication standard, search third communication standard is relative to the first communication system
The frequency point of the adjacent area of formula；If the frequency point of the adjacent area can be resident, reside on the frequency point of the adjacent area.
11. terminal device according to claim 10, it is characterised in that:
The memory is also used to store history frequency point；
The processor is also used to when the frequency point of the adjacent area cannot be resident, and searches for stored institute in the memory
State the history frequency point of third communication standard；If the history frequency point can be resident, reside on the history frequency point.
12. terminal device according to claim 11, it is characterised in that:
The processor is also used to when the history frequency point cannot be resident, and is searched under the third communication standard except described
All frequency points except history frequency point.
13. terminal device according to any one of claims 10 to 12, it is characterised in that:
The processor falls back to global system for mobile communications GSM (2G) net specifically for working as from Long Term Evolution LTE network
When network fails, frequency point of Universal Mobile Communication System UMTS (3G) network relative to the adjacent area of LTE network is searched for；As the UMTS
When (3G) network can be resident relative to the frequency point of the adjacent area of LTE, then reside on the frequency point of the adjacent area.
14. terminal device according to any one of claims 10 to 12, it is characterised in that:
The processor, specifically for searching for GSM (2G) network phase when falling back to UMTS (3G) network failure from LTE network
For the frequency point of the adjacent area of LTE network；When the GSM (2G) network can be resident relative to the frequency point of the adjacent area of LTE network,
It then resides on the frequency point of the adjacent area.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510970766.7A CN105578544B (en) | 2015-12-21 | 2015-12-21 | A kind of method and terminal device of circuit domain exchange falling |
| CN201811379015.8A CN109379768B (en) | 2015-12-21 | 2015-12-21 | Circuit domain switching fallback method and terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510970766.7A CN105578544B (en) | 2015-12-21 | 2015-12-21 | A kind of method and terminal device of circuit domain exchange falling |
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| CN201811379015.8A Division CN109379768B (en) | 2015-12-21 | 2015-12-21 | Circuit domain switching fallback method and terminal equipment |
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| CN105578544A CN105578544A (en) | 2016-05-11 |
| CN105578544B true CN105578544B (en) | 2018-12-07 |
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| CN201811379015.8A Active CN109379768B (en) | 2015-12-21 | 2015-12-21 | Circuit domain switching fallback method and terminal equipment |
| CN201510970766.7A Active CN105578544B (en) | 2015-12-21 | 2015-12-21 | A kind of method and terminal device of circuit domain exchange falling |
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| CN201811379015.8A Active CN109379768B (en) | 2015-12-21 | 2015-12-21 | Circuit domain switching fallback method and terminal equipment |
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Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106028406B (en) * | 2016-06-30 | 2019-07-09 | 华为技术有限公司 | Wireless terminal, cut-in method and device |
| CN106102107B (en) * | 2016-08-15 | 2018-06-29 | 广东欧珀移动通信有限公司 | A kind of processing incoming call and terminal |
| CN106341803A (en) * | 2016-09-05 | 2017-01-18 | 深圳市万普拉斯科技有限公司 | Method for improving call completion ratio of LTE terminal equipment and terminal equipment |
| CN108243442B (en) * | 2016-12-27 | 2021-04-23 | 中国移动通信集团浙江有限公司 | Analysis processing method and device for wireless communication network type fallback |
| CN108702667A (en) * | 2017-06-29 | 2018-10-23 | 华为技术有限公司 | A kind of method and terminal of circuit domain dropping |
| CN108235825B (en) * | 2017-09-30 | 2021-01-19 | 深圳市欢太科技有限公司 | CSFB (Circuit switched Fall Back) fall result detection method and device and computer storage medium |
| WO2019061428A1 (en) * | 2017-09-30 | 2019-04-04 | 深圳市云中飞网络科技有限公司 | Csfb fallback result detection method and device and storage medium |
| WO2019061483A1 (en) * | 2017-09-30 | 2019-04-04 | 深圳市云中飞网络科技有限公司 | Method and device for detecting fallback result of csfb, and computer storage medium |
| CN108235824B (en) * | 2017-09-30 | 2021-01-12 | 深圳市欢太科技有限公司 | CSFB (Circuit switched Fall Back) fall result detection method and device and computer storage medium |
| WO2019061482A1 (en) * | 2017-09-30 | 2019-04-04 | 深圳市云中飞网络科技有限公司 | Csfb result detection method and device, and computer storage medium |
| CN107980232B (en) * | 2017-09-30 | 2021-02-12 | 深圳市欢太科技有限公司 | CSFB (Circuit switched Fall Back) fall result detection method and device and computer storage medium |
| CN108124511B (en) * | 2017-09-30 | 2020-12-22 | 深圳市欢太科技有限公司 | CSFB (Circuit switched Fall Back) result detection method and device and storage medium |
| WO2019061479A1 (en) * | 2017-09-30 | 2019-04-04 | 深圳市云中飞网络科技有限公司 | Csfb result detection method and device, and computer storage medium |
| CN108064458B (en) * | 2017-09-30 | 2020-12-22 | 深圳市欢太科技有限公司 | CSFB (Circuit switched Fall Back) fall result detection method and device and computer storage medium |
| US11412434B2 (en) | 2017-10-13 | 2022-08-09 | Huawei Technolgoies Co., Ltd. | Cell selection method and terminal |
| CN109600805B (en) * | 2018-12-21 | 2021-02-23 | 华为技术服务有限公司 | Communication method, device and system |
| CN110337128B (en) * | 2019-07-25 | 2021-07-27 | 中国联合网络通信集团有限公司 | Cell fallback method and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108402A (en) * | 2011-11-11 | 2013-05-15 | 中兴通讯股份有限公司 | Voice service implementation method, voice fall back implementation terminal and system thereof |
| CN103702378A (en) * | 2013-12-23 | 2014-04-02 | 北京北方烽火科技有限公司 | Voice service processing method and device of LTE ( long term evolution) cell |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120064885A1 (en) * | 2010-09-14 | 2012-03-15 | Qualcomm Incorporated | System and method of improving circuit-switched fallback user experience |
| GB2497090B (en) * | 2011-11-29 | 2014-12-03 | Broadcom Corp | Mobile communication networks |
| CN103068010A (en) * | 2012-12-26 | 2013-04-24 | 华为技术有限公司 | Selection method and device of target area |
| WO2014133313A1 (en) * | 2013-02-26 | 2014-09-04 | Samsung Electronics Co., Ltd. | Method and system for improving circuit switched fall back (csfb) performance |
| US20150208285A1 (en) * | 2014-01-17 | 2015-07-23 | Mediatek Inc. | Apparatus and method for circuit switched fallback |
-
2015
- 2015-12-21 CN CN201811379015.8A patent/CN109379768B/en active Active
- 2015-12-21 CN CN201510970766.7A patent/CN105578544B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108402A (en) * | 2011-11-11 | 2013-05-15 | 中兴通讯股份有限公司 | Voice service implementation method, voice fall back implementation terminal and system thereof |
| CN103702378A (en) * | 2013-12-23 | 2014-04-02 | 北京北方烽火科技有限公司 | Voice service processing method and device of LTE ( long term evolution) cell |
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| CN109379768A (en) | 2019-02-22 |
| CN105578544A (en) | 2016-05-11 |
| CN109379768B (en) | 2022-01-14 |
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