CN105657766B - Circuit domain fallback method and device, terminal - Google Patents
Circuit domain fallback method and device, terminal Download PDFInfo
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- CN105657766B CN105657766B CN201410659885.6A CN201410659885A CN105657766B CN 105657766 B CN105657766 B CN 105657766B CN 201410659885 A CN201410659885 A CN 201410659885A CN 105657766 B CN105657766 B CN 105657766B
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Abstract
The embodiment of the invention discloses a kind of circuit domain fallback method and devices, terminal, the described method includes: after terminal receives circuit domain dropping to the instruction of 2G network, locally searching whether that being stored with 3G network faces area's frequency point information, it is stored with when 3G faces area's frequency point information and faces the progress frequency point search of area's frequency point information by the 3G, and the frequency point by searching carries out circuit domain CS service access.
Description
Technical field
The present invention relates to circuit domain dropping technology more particularly to a kind of circuits collectively covered under network suitable for 2G and 3G
Domain dropping method and device, terminal.
Background technique
In the epoch that 3G arrives, operator need to take into account 2G and 3G subscription, while support 2G and 3G network.Majority of case
Under, since 2G network such as global system for mobile communications (GSM, Global System for Mobile Communication) is built
Net is mature, and the covering of 2G network is much better than the covering of 3G network, in order to guarantee voice service, is inclined to preference circuit domain dropping
(CSFB, Circuit Switched Fallback) arrives 2G network.But there is also many limitations for 2G network, such as GSM network equipment
It does not support or does not open double-transmission mode (DTM, Dual Transfer Mode), i.e., do not support the concurrent industry of data and voice
Business, or even if network support DTM, since GSM network voice service is excessively busy, so that being distributed to without extra interface-free resources
Terminal supports DTM.And region locating for terminal is likely that there are a large amount of 3G available network resources at this time, and 3G network supports data
And speech concurrent, user have better user experience.And network only supports that CSFB falls back to 2G or 3G network in 3GPP standard,
Without supporting to fall back to 2G or 3G network according to network coverage situation dynamic select.Thus, how to allow terminal according to the network coverage
Situation dynamic select CSFB, which falls back to 2G network or 3G network, becomes operator's problems faced.
Summary of the invention
The embodiment of the present invention can make in order to solve the above technical problems, provide a kind of circuit domain fallback method and device, terminal
Terminal priority access 3G network after receiving circuit domain dropping instruction, to make the business experience better effect of terminal.
The technical solution of the embodiment of the present invention is achieved in that
A kind of circuit domain fallback method, comprising:
After terminal receives circuit domain dropping to the instruction of 2G network, locally searching whether to be stored with 3G network Lin Qu frequency
Point information is stored with and faces area's frequency point information by the 3G when 3G faces area's frequency point information and carry out frequency point search, and by searching
Frequency point carries out circuit domain CS service access.
Preferably, the method also includes:
Not stored there is 3G network to face area's frequency point information or when search 3G faces the failure of area's frequency point information, the terminal exists local
The 3G subdistrict frequency point information for locally searching whether storage recent visit, by institute when being stored with the 3G subdistrict frequency point information of recent visit
The 3G subdistrict frequency point information for stating recent visit carries out frequency point search, and the frequency point by searching carries out CS service access.
Preferably, the method also includes:
Preferably, the method also includes:
When not searching the 3G subdistrict frequency point information of recent visit, then according to the corresponding 3G of public land mobile network PLMN
Frequency band list carries out frequency point search, and the frequency point by searching carries out CS service access.
Preferably, the method also includes:
When carrying out CS voice service access failure by 3G frequency point, the 2G cell that the terminal is sent according to network side is frequently
Point information carries out CS voice service access.
Preferably, the method also includes:
The terminal updates the 3G subdistrict frequency point letter of local recent visit after carrying out CS service access by 3G frequency point
Breath.
Preferably, the method also includes:
When the terminal is in idle condition, the system message that network side is sent is received, is obtained from the system message
3G network faces area's frequency point information, and stores the 3G network and face area's frequency point information.
A kind of circuit domain dropping device, comprising: receiving unit, storage unit, searching unit and access unit, in which:
Receiving unit for receiving the instruction of circuit domain dropping to 2G network, and triggers the searching unit；
Storage unit, the 3G network for storing network side system message arrangement face area's frequency point information；
Searching unit, for searching whether that being stored with 3G network faces area's frequency point information, is stored in the storage unit
3G triggers the access unit when facing area's frequency point information；
Access unit carries out frequency point search for facing area's frequency point information by the 3G, and the frequency point by searching carries out
Circuit domain CS service access.
Preferably, the storage unit is also used to store the 3G subdistrict frequency point information of recent visit；
The searching unit, is also used to when the not stored 3G network of the storage unit faces area's frequency point information or the access
When unit searches 3G faces the failure of area's frequency point information, in the 3G subdistrict frequency point information for locally searching whether storage recent visit, storage
When having the 3G subdistrict frequency point information of recent visit, the access unit is triggered；The access unit presses the 3G of the recent visit
Subdistrict frequency point information carries out frequency point search, and the frequency point by searching carries out CS service access.
Preferably, the access unit is also used in the 3G subdistrict frequency point information for not searching recent visit, according to public affairs
The corresponding 3G frequency band list of land mobile network PLMN carries out frequency point search altogether, and the frequency point by searching carries out CS business and connects
Enter.
Preferably, the receiving unit is also used to receive the 2G cell frequency point information of network side transmission；
When the access unit carries out CS voice service access failure by 3G frequency point, the 2G sent according to network side is small
Area's frequency point information carries out CS voice service access.
Preferably, described device further include:
Updating unit, for after carrying out CS service access by 3G frequency point, updating the storage in the access unit
The 3G subdistrict frequency point information of the recent visit stored in unit.
Preferably, the receiving unit is also used to when described device is in idle condition, and receive network side transmission is
System message obtains 3G network from the system message and faces area's frequency point information, and the 3G network is faced the storage of area's frequency point information
To the storage unit.
A kind of terminal, including circuit domain dropping device above-mentioned.
In the embodiment of the present invention, terminal is first after receiving instruction of the circuit domain dropping of network side transmission to 2G network
First face area's frequency point information locally searching whether to be stored with 3G network, when storage, then faces area's frequency point by 3G network and scans for, and
3G network frequency point is accessed after searching for successfully and carries out corresponding CS business, if 3G network frequency point is not searched, in local
Search whether the 3G subdistrict frequency point information for being stored with recent visit, when storage is then searched by the 3G subdistrict frequency point of recent visit
Rope, and access 3G network frequency point after searching for successfully and carry out corresponding CS business.If the 3G cell frequency for passing through recent visit
Point still access failure, then can by the corresponding frequency range of PLMN identifier lookup 3G network, 3G frequency range is scanned for and access into
Row CS business.Only when terminal cannot access 3G network, CS language is just carried out according to the 2G cell frequency point information that network side is sent
Sound business access.
Compared with prior art, the technical solution of the embodiment of the present invention is at least following the utility model has the advantages that when carrying out CSFB,
The autonomous first search of terminal and access 3G cell, it is ensured that terminal is having the overlay area 3G, and terminal preferentially falls back to 3G network, guarantees
User has good experience；Also, when the technical solution of the embodiment of the present invention has voice fallback under 2/3G covering scene at the same time
The mode of network selection has been determined, has compensated for the deficiency of 3GPP standard.
Detailed description of the invention
Fig. 1 is the flow chart of the circuit domain fallback method of the embodiment of the present invention；
Fig. 2 is the flow chart of the circuit domain fallback method of example one of the present invention；
Fig. 3 is the flow chart of the circuit domain fallback method of example two of the present invention；
Fig. 4 is the flow chart of the circuit domain fallback method of example three of the present invention；
Fig. 5 is the composed structure schematic diagram of the circuit domain dropping device of the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples and referring to attached drawing, right
The present invention is further described.
In the CSFB scheme of existing 3GPP standard, network side can only be configured to fall back to 2G network or 3G network, without
It can flexibly be handled according to wireless network coverage condition, selection return back to 3G or 2G network, if CSFB falls back to 2G network, props up
The covering for holding voice service can guarantee but support data and speech concurrent ability not good enough, can if CSFB falls back to 3G network
To support data and speech concurrent, but it is limited to 3G network coverage area.The technical solution of the embodiment of the present invention is directed to above-mentioned feelings
Whether condition configures 3G in the system message that terminal is sent according to LTE network and faces when network configuration is that CSFB falls back to 2G network
Cell information or according to access 3G cell history information and PLMN corresponding frequency band information search 3G network cell.Terminal is autonomous
Preferential selection access 3G network carries out CS voice service and then issues by network side but if terminal does not search 3G network
2G cell frequency point information, access 2G network carry out CS voice service.
Fig. 1 is the flow diagram of the circuit domain fallback method of the embodiment of the present invention, as shown in Figure 1, this exemplary circuit
Domain dropping method the following steps are included:
Step 101, it after terminal receives circuit domain dropping to the instruction of 2G network, searches whether to be stored with 3G net locally
The area Luo Lin frequency point information is stored with when 3G faces area's frequency point information and faces the progress frequency point search of area's frequency point information by the 3G, and passes through
The frequency point searched carries out circuit domain CS service access.
In the embodiment of the present invention, when terminal is in idle condition, the system message (SIB6) that network side is sent is received, from
3G network is obtained in the system message and faces area's frequency point information, and is stored the 3G network and faced area's frequency point information.
Step 102, it is local it is not stored there is 3G network to face area's frequency point information or when search 3G faces the failure of area's frequency point information, institute
Terminal is stated in the 3G subdistrict frequency point information for locally searching whether storage recent visit, is stored with the 3G subdistrict frequency point letter of recent visit
Frequency point search is carried out by the 3G subdistrict frequency point information of the recent visit when breath, and the frequency point by searching carries out CS business and connects
Enter.
In the embodiment of the present invention, when terminal is after carrying out CS service access by 3G frequency point, it will timely update local
The 3G subdistrict frequency point information of recent visit.
Step 103, when not searching the 3G subdistrict frequency point information of recent visit, then according to public land mobile network PLMN
Corresponding 3G frequency band list carries out frequency point search, and the frequency point by searching carries out CS service access.
Step 104, when carrying out CS voice service access failure by 3G frequency point, the terminal is sent according to network side
2G cell frequency point information carries out CS voice service access.
Below by way of specific example, the essence of the technical solution for embodiment that the present invention is furture elucidated.
Fig. 2 is the flow chart of the circuit domain fallback method of example one of the present invention, as shown in Fig. 2, terminal resides at LTE network
In, and in Idle state, terminal reads LTE network system message (SIB6), and the 3G that network side configuration is obtained from SIB6 faces
Area's frequency point information, and store.When receive network side transmission circuit domain dropping to 2G network instruction (RRC_
Connection_release message, wherein carrying redirection information RedirectedCarrierInfo), terminal will be at this
Ground searches 3G and faces area's frequency point information, and faces area's frequency point according to the 3G found and scan for.When searching 3G cell, terminal access
3G cell initiates CS audio call；And update the recent visit 3G subdistrict frequency point information of terminal local storage.
If network side does not configure 3G Lin Qu or because terminal is in connected state and can not read LTE system message, eventually
3G network is searched for according to recent visit 3G network historical information and is accessed at end, if not searching element finally to 3G network, is pressed
PLMN network No. corresponds to frequency point/band information and searches for and access 3G network.If terminal accesses 3G network by above-mentioned all modes
Still fail, then the 2G cell frequency point information that terminal is issued according to network side accesses and carries out CS voice service.
In the embodiment of the present invention, when terminal is in Idle state, the 3G Lin Qu in LTE system message SIB6 can be read and incited somebody to action
3G faces the local 3G of area's information deposit and faces cell band information list.When terminal, which needs to fall after rise, carries out voice service, terminal is pressed
3G faces area's frequency point information and scans for, and the frequency point information of the 3G cell is updated to local if it can be successfully accessed 3G cell
The recent visit 3G subdistrict frequency point information list of storage.
When terminal is in connected state, the 3G that may do not receive network side configuration before faces cell band information, then by most
The frequency point information that proximity enters 3G cell scans for, if do not searched, the frequency band list that PLMN List corresponds to 3G is swept
Retouch search；
The 3G subdistrict frequency point that 3G faces subdistrict frequency point information list and recent visit is stored in the embodiment of the present invention, in terminal
Information list, wherein 3G, which faces in subdistrict frequency point information list, to be stored with currently resident LTE cell configuration 3G and face Qu Liebiao, idle
State terminal can carry out real-time update according to LTE system message (SIB6) configuration 3G Lin Qu is read；The 3G subdistrict frequency point of recent visit
Information list: after being successfully accessed 3G network every time, terminal updates recent visit 3G subdistrict frequency point information list；
Fig. 3 is the flow chart of the circuit domain fallback method of example two of the present invention, as shown in figure 3, in this example, terminal conduct
Caller exhalation, when CSFB terminal initiates CS voice caller (Extended Service Request), network side issues RRC
Connection release, terminal Idle state or connected state processing before search 3G cell (stream shown in Figure 2
Journey), it is preferential to select to be resident 3G network, it is secondary to select 2G network.It is linked into 3G/2G cell, the rear joint LA/RA that initiates updates.This example
Circuit domain fallback method the following steps are included:
Step 1, moving exchanging center MSC initiates the paging to UE, and UE responds the paging message；MME sends electricity to base station
Road domain dropping indicates (CS Fallback indicator) message；
Step 2, base station sends RRC connection release message to terminal, and instruction terminal redirects；
Step 4, base station sends context release request (Context Release Request) message to MME；
Specifically, step 6- step 7, UE are configured according to LTE network 3G Lin Qu, and preferably access 3G network, secondary choosing accesses 2G
Network opens exemplary 3G network access selection shown in Fig. 2 of the present invention.
Specifically, step 6- step 11, UE open the process of access 2G network.
It is no longer superfluous here since the access step of step 6 to step 11 is the standard access process of correlation standard
It states it and accesses details.
Fig. 4 is the flow chart of the circuit domain fallback method of example three of the present invention, as shown in figure 4, in this example, terminal conduct
Called incoming call, when CSFB terminal receives paging (CS Paging), network side issues RRCconnection release, terminal
3G cell (process shown in Figure 2) is searched according to Idle state before or link state processing, it is preferential to select to be resident 3G network, it is secondary
Select 2G network.It is linked into 3G/2G cell, the rear joint LA/RA that initiates updates.This exemplary circuit domain fallback method includes following step
It is rapid:
Step 1, moving exchanging center MSC initiates the paging to UE, and UE responds the paging message；MME sends electricity to base station
Road domain dropping indicates (CS Fallback indicator) message；
Step 2, base station sends RRC connection release message to terminal, and instruction terminal redirects；
Step 3, base station sends context release request (Context Release Request) message to MME；
Step 4, UE is configured according to LTE network 3G Lin Qu, and preferably access 3G network, secondary choosing accesses 2G network, open this hair
Exemplary 3G network access selection shown in bright Fig. 2.
Specifically, step 5- step 6, UE are configured according to LTE network 3G Lin Qu, and preferably access 3G network, secondary choosing accesses 2G
Network opens exemplary 3G network access selection shown in Fig. 2 of the present invention.
Specifically, step 5- step 8, UE open the process of access 2G network.
Since the access step of step 5 to step 8 is the standard access process of correlation standard, which is not described herein again
It accesses details.
The embodiment of the present invention passes through the autonomous first search of CSFB terminal and access 3G cell, it is ensured that terminal is having the 3G area of coverage
Domain, terminal preferentially fall back to 3G network, guarantee that user has good experience；Also pass through the autonomous first search of CSFB terminal and access
3G cell solves the problems, such as to exist simultaneously voice fallback network selection under 2/3G covering scene, compensates in 3GPP standard not
Support while issuing the deficiency that configuration 3G and 2G faces area's frequency point problem and can only issue same class network cell frequency point information.
Fig. 5 is the composed structure schematic diagram of the circuit domain dropping device of the embodiment of the present invention, as shown in figure 5, the present invention is real
The circuit domain dropping device for applying example includes receiving unit 50, storage unit 51, searching unit 52 and access unit 53, in which:
Receiving unit 50 for receiving the instruction of circuit domain dropping to 2G network, and triggers the searching unit 52；
Storage unit 51 faces area's frequency point information for storing 3G network；
Searching unit 52, the 3G net for searching whether to be stored with network side system message arrangement in the storage unit
The area Luo Lin frequency point information is stored with when 3G faces area's frequency point information and triggers the access unit；
Access unit 53 carries out frequency point search for facing area's frequency point information by the 3G, and by the frequency point that searches into
Row circuit domain CS service access.
In the embodiment of the present invention, the storage unit 51 is also used to store the 3G subdistrict frequency point information of recent visit；
The searching unit 52 is also used to when the not stored 3G network of the storage unit faces area's frequency point information or described connects
Enter unit 53 search for 3G face area's frequency point information failure when, locally search whether storage recent visit 3G subdistrict frequency point information,
When being stored with the 3G subdistrict frequency point information of recent visit, the access unit 53 is triggered by the 3G subdistrict frequency point of the recent visit
Information carries out frequency point search, and the frequency point by searching carries out CS service access.
In the embodiment of the present invention, the access unit 53 is also used in the 3G subdistrict frequency point letter for not searching recent visit
When breath, frequency point search, and the frequency point by searching are carried out according to the corresponding 3G frequency band list of public land mobile network PLMN
Carry out CS service access.
In the embodiment of the present invention, the receiving unit 50 is also used to receive the 2G cell frequency point information of network side transmission；
When the access unit 53 carries out CS voice service access failure by 3G frequency point, according to the 2G of network side transmission
Subdistrict frequency point information carries out CS voice service access.
On the basis of circuit domain dropping device shown in Fig. 5, described device further include:
Updating unit (is not shown) in Fig. 5, is used in the access unit after carrying out CS service access by 3G frequency point,
Update the 3G subdistrict frequency point information of recent visit stored in the storage unit.
In the embodiment of the present invention, the receiving unit 50 is also used to when described device is in idle condition, and receives network
The system message that side is sent obtains 3G network from the system message and faces area's frequency point information, and frequently by the 3G network Lin Qu
Point information is stored to the storage unit 51.
In the embodiment of the present invention, the alien frequencies frequency point includes different system frequency point.
It will be appreciated by those skilled in the art that managing the realization of unit everywhere in circuit domain dropping device shown in Fig. 5
Function can refer to the associated description of aforementioned circuit domain dropping method and embodiment and understand.Those skilled in the art should manage
It solving, the function of each processing unit can be realized and running on the program on processor in circuit domain dropping device shown in fig. 5,
It can also be realized by specific logic circuit.
The embodiment of the present invention also describes a kind of terminal, and the terminal includes circuit domain dropping device shown in fig. 5.
The embodiment of the present invention also describes a kind of terminal, and the terminal includes that previous embodiment frequency point as shown in Figure 4 is surveyed
Measure device.
It, in the absence of conflict, can be in any combination between technical solution documented by the embodiment of the present invention.
In several embodiments provided by the present invention, it should be understood that disclosed method, apparatus and electronic equipment,
It may be implemented in other ways.Apparatus embodiments described above are merely indicative, for example, the unit is drawn
Point, only a kind of logical function partition, there may be another division manner in actual implementation, such as: multiple units or components can
To combine, or it is desirably integrated into another system, or some features can be ignored or not executed.In addition, shown or discussed
The mutual coupling of each component part or direct-coupling or communication connection can be through some interfaces, equipment or unit
Indirect coupling or communication connection can be electrical, mechanical or other forms.
Above-mentioned unit as illustrated by the separation member, which can be or may not be, to be physically separated, aobvious as unit
The component shown can be or may not be physical unit, it can and it is in one place, it may be distributed over multiple network lists
In member；Some or all of units can be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In addition, each functional unit in various embodiments of the present invention can be fully integrated in one processing unit, it can also
To be each unit individually as a unit, can also be integrated in one unit with two or more units；It is above-mentioned
Integrated unit both can take the form of hardware realization, can also realize in the form of hardware adds application function unit.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned include: movable storage device, it is read-only
Memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or
The various media that can store program code such as person's CD.
If alternatively, the above-mentioned integrated unit of the embodiment of the present invention is realized in the form of applied function module and as independence
Product when selling or using, also can store in a computer readable storage medium.Based on this understanding, this hair
The technical solution of bright embodiment substantially in other words the part that contributes to existing technology can in the form of application product body
Reveal and, which is stored in a storage medium, including some instructions are with so that a computer is set
Standby (can be personal computer, server or network equipment etc.) executes the whole of each embodiment the method for the present invention
Or part.And storage medium above-mentioned include: movable storage device, read-only memory (ROM, Read-Only Memory), with
Machine accesses various Jie that can store program code such as memory (RAM, Random Access Memory), magnetic or disk
Matter.
Scope of protection of the present invention is not limited thereto, those familiar with the art the invention discloses skill
It within the scope of art, can easily think of the change or the replacement, should be covered by the protection scope of the present invention.
Claims (11)
1. a kind of circuit domain fallback method, which is characterized in that the described method includes:
After terminal receives circuit domain dropping to the instruction of 2G network, locally searching whether that being stored with 3G network faces area's frequency point letter
Breath is stored with when 3G faces area's frequency point information and faces the progress frequency point search of area's frequency point information, and the frequency point by searching by the 3G
Carry out circuit domain CS service access；
Not stored there is 3G network to face area's frequency point information or when search 3G faces the failure of area's frequency point information, the terminal is in local local
The 3G subdistrict frequency point information for searching whether storage recent visit, when being stored with the 3G subdistrict frequency point information of recent visit by it is described most
The 3G subdistrict frequency point information closely accessed carries out frequency point search, and the frequency point by searching carries out CS service access.
2. the method according to claim 1, wherein the method also includes:
When not searching the 3G subdistrict frequency point information of recent visit, then according to the corresponding 3G frequency range of public land mobile network PLMN
List carries out frequency point search, and the frequency point by searching carries out CS service access.
3. method according to claim 1 or 2, which is characterized in that the method also includes:
When carrying out CS voice service access failure by 3G frequency point, the terminal is believed according to the 2G cell frequency point that network side is sent
Breath carries out CS voice service access.
4. method according to claim 1 or 2, which is characterized in that the method also includes:
The terminal updates the 3G subdistrict frequency point information of local recent visit after carrying out CS service access by 3G frequency point.
5. method according to claim 1 or 2, which is characterized in that the method also includes:
When the terminal is in idle condition, the system message that network side is sent is received, 3G net is obtained from the system message
The area Luo Lin frequency point information, and store the 3G network and face area's frequency point information.
6. a kind of circuit domain dropping device, which is characterized in that described device include: receiving unit, storage unit, searching unit and
Access unit, in which:
Receiving unit for receiving the instruction of circuit domain dropping to 2G network, and triggers the searching unit；
Storage unit faces area's frequency point information for storing 3G network；
Searching unit, the 3G network Lin Qu for searching whether to be stored with network side system message arrangement in the storage unit
Frequency point information is stored with when 3G faces area's frequency point information and triggers the access unit；
Access unit carries out frequency point search for facing area's frequency point information by the 3G, and the frequency point by searching carries out circuit
Domain CS service access；
The storage unit is also used to store the 3G subdistrict frequency point information of recent visit；
The searching unit, is also used to when the not stored 3G network of the storage unit faces area's frequency point information or the access unit
When search 3G faces the failure of area's frequency point information, in the 3G subdistrict frequency point information for locally searching whether storage recent visit, it is stored with most
When the 3G subdistrict frequency point information closely accessed, the access unit is triggered；The access unit presses the 3G cell of the recent visit
Frequency point information carries out frequency point search, and the frequency point by searching carries out CS service access.
7. device according to claim 6, which is characterized in that the access unit is also used to do not searching nearest visit
When the 3G subdistrict frequency point information asked, frequency point search is carried out according to the corresponding 3G frequency band list of public land mobile network PLMN, and
CS service access is carried out by the frequency point searched.
8. device according to claim 6 or 7, which is characterized in that the receiving unit is also used to receive network side transmission
2G cell frequency point information；
When the access unit carries out CS voice service access failure by 3G frequency point, according to the 2G cell frequency of network side transmission
Point information carries out CS voice service access.
9. device according to claim 6 or 7, which is characterized in that described device further include:
Updating unit, for after carrying out CS service access by 3G frequency point, updating the storage unit in the access unit
The 3G subdistrict frequency point information of the recent visit of middle storage.
10. device according to claim 6 or 7, which is characterized in that the receiving unit is also used at described device
When idle state, the system message that network side is sent is received, 3G network is obtained from the system message and faces area's frequency point information,
And the 3G network is faced into area's frequency point information and is stored to the storage unit.
11. a kind of terminal, which is characterized in that the terminal includes the described in any item circuit domain dropping dresses of claim 6 to 10
It sets.
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| CN201410659885.6A CN105657766B (en) | 2014-11-18 | 2014-11-18 | Circuit domain fallback method and device, terminal |
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| CN201410659885.6A CN105657766B (en) | 2014-11-18 | 2014-11-18 | Circuit domain fallback method and device, terminal |
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| CN107197504A (en) * | 2017-06-28 | 2017-09-22 | 深圳天珑无线科技有限公司 | The method and device of frequency access |
| WO2019061431A1 (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 |
| CN108235826B (en) * | 2017-09-30 | 2021-02-19 | 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 |
| CN107959952B (en) * | 2017-12-21 | 2021-01-08 | 维沃移动通信有限公司 | Method and terminal for detecting inter-system cell |
| CN108770013B (en) * | 2018-06-26 | 2021-09-21 | 中国联合网络通信集团有限公司 | Network monitoring method and device |
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