CN105451276B - Cell remapping method based on circuit domain dropping CSFB - Google Patents
Cell remapping method based on circuit domain dropping CSFB Download PDFInfo
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Abstract
The present invention relates to the cell remapping methods based on circuit domain dropping CSFB, this method comprises: being based on the first communication network in current service cell is grouped domain business；If receiving circuit domain business notice, circuit domain is fallen back to by the packet domain, and selects the first object adjacent area that can carry out circuit domain business to carry out cell resetting, the network type of the first object adjacent area is the second communication network；If the cell failing-resetting, continue to reside in circuit domain, the terminal executes cell selection, and is connected to the second Target cell that can carry out circuit domain business.The present invention can be improved call and be created as power, to improve communication quality.
Description
Technical field
The present invention relates to field of communication technology, in particular to a kind of cell remapping method based on circuit domain dropping CSFB.
Background technique
Circuit domain dropping (Circuit Switched Domain Fall Back, abbreviation CSFB) can be realized user and set
Standby (User Equipment, abbreviation UE) initiates the circuit switching such as voice (Circuit Switched, abbreviation under LTE access
CS) business receives the paging of the CS business such as voice, and can be to terminal in long term evolution (Long Term
Evolution, abbreviation LTE) ongoing packet switch (Packet Switch, abbreviation PS) business carries out under system access
It properly processes.In CSFB technology, in double overlay areas of LTE and 2G/3G, to voice, location service (Location
Services, abbreviation LCS) and supplementary service, user equipment, which can trigger to access from LTE, return back to Generation Mobile Telecommunication System technology
(2rd-generation, abbreviation 2G)/3rd generation mobile communication technology (3rd-generation, abbreviation 3G) network insertion is gone forward side by side
Row CS business.
CSFB has become operator in the choice of technology of LTE deployment initial stage voice solution at present.It is returned using CSFB
The scheme for dropping down onto 2G/3G offer voice service can make full use of conventional network resources, provide reliable, high quality language for user
Sound service.
In the prior art, when user equipment be located at the networks such as 2G, 3G and LTE it is overlapping covered in, need to carry out
When voice service, above-mentioned CSFB process will do it, carry out cell resetting (Cell Change Order), and be reset to 2G cell,
To carry out institute's voice traffic.User equipment needs to monitor the system information of Cell Broadcast CB, according to network side provide cell come
Carry out cell resetting.
But the prior art can return to LTE network in cell failing-resetting, first establish RRC (Radio
Resource Control) link, under active call or called paging, user/application layer can initiate audio call again, weight
It is new to carry out CSFB process and the resetting of above-mentioned cell, cause to link expense, calling delay, system response time is slack-off, influences to communicate
Quality and user experience.
Summary of the invention
The technical issues of technical solution of the present invention is solved is, how in the cell failing-resetting based on CSFB process,
It avoids calling again, to improve communication quality.
In order to solve the above-mentioned technical problem, technical solution of the present invention provides a kind of cell based on circuit domain dropping CSFB
Remapping method, comprising:
The first communication network, which is based on, in current service cell is grouped domain business；
If receiving circuit domain business notice, circuit domain is fallen back to by the packet domain, and select that circuit domain can be carried out
To carry out cell resetting, the network type of the first object adjacent area is the second communication network for the first object adjacent area of business；
If the cell failing-resetting, continue to reside in circuit domain, the terminal executes cell selection, and being connected to can
Carry out the second Target cell of circuit domain business；The network type of second target adjacent area is that the second communication network or third are logical
Communication network.
Optionally, first communication network and the packet switch domain service type matching, second communication network and the
Three communication networks and the circuit domain business type matching.
Optionally, first communication network is LTE network, and second communication network is 2G network, and the third is logical
Communication network is 3G network.
Optionally, the packet switch domain service is data service, and the circuit domain business is voice service.
Optionally, the first object adjacent area is the cell that second communication network is terminal configuration, second mesh
Mark adjacent area is the cell that terminal is voluntarily selected based on second communication network and third communication network.
Optionally, the selection can carry out the first object adjacent area of circuit domain business and include:
The system information of current service cell broadcast is received, the neighbour of the current service cell is carried in the system information
Area's list and the network information；
It is true according to the circuit domain business type and the network type of adjacent area, the neighboring cell list from the current service cell
The fixed first object adjacent area.
Optionally, the terminal executes cell selection and includes:
Neighboring cell list based on the current service cell selects second target adjacent area.
Optionally, the terminal executes cell selection further include:
If the second target adjacent area failure of the neighboring cell list selection based on the current service cell is connected to, based on eventually
The neighboring cell list of Historic preservation is held to select second target adjacent area.
Optionally, in the neighboring cell list for the terminal Historic preservation being based on the network type of cell be the second communication network or
Third communication network.
Optionally, the terminal executes cell selection further include:
If be connected to based on the terminal Historic preservation neighboring cell list selection the second target adjacent area failure, terminal into
Row frequency sweep is to obtain initial cell list；
Second target adjacent area is selected based on the initial cell list.
Optionally, if the first object adjacent area is not present or the first object adjacent area exists and its co-channel interference
Adjacent cell then causes to reset to the first object adjacent area failure.
Optionally, if second target adjacent area is not present or second target adjacent area exists and its co-channel interference
Adjacent cell then causes to be connected to the failure of second target adjacent area.
The beneficial effect of technical solution of the present invention includes at least:
Technical solution of the present invention not returns to LTE network and re-establishes RRC link in cell failing-resetting, and
It is to continue with the first object adjacent area (namely continuing to reside in circuit domain) that network offer is provided, directly by terminal (user equipment)
It attempts to find suitable cell in network to be resident, and prepares to initiate access under residing mode, to carry out circuit domain business
(can be voice service).
Technical solution of the present invention can reduce the resource overhead for returning to LTE network again and establishing RRC link, Neng Gou
Cell resetting and cell failing-resetting resident period, be directly based upon circuit domain business initial call or initial Page and continue
It selects cell resident, suitable cell can be searched out during the initial call or initial Page of circuit domain business, greatly shortened
Delay required for circuit domain business is initiated again, improves system response time, additionally it is possible to it improves call and is created as power, it can also
Call required time is established again to shorten, to improve communication quality and user experience.
In the optinal plan of technical solution of the present invention, arranged in cell failing-resetting and adjacent area based on current service cell
When table selects cell failure, the range of terminal selection cell can be expanded: can choose the adjacent area for residing at the holding of terminal history
Cell in list, or trial reside at terminal and search the resulting cell of net comprehensively, to improve the reliability of terminal selection cell
And success rate.
Detailed description of the invention
Fig. 1 is the distribution schematic diagram of LTE network, 3G network and 2G network coverage in technical solution of the present invention；
Fig. 2 is a kind of process of the cell remapping method based on circuit domain dropping CSFB provided by technical solution of the present invention
Schematic diagram；
Fig. 3 is a kind of method flow schematic diagram of cell resetting provided by technical solution of the present invention；
Fig. 4 is the method flow signal provided by technical solution of the present invention in the selection of cell failing-resetting latter cell
Figure.
Specific embodiment
In order to keep the purpose of the present invention, feature and effect more obvious and easy to understand, with reference to the accompanying drawing to of the invention
Specific embodiment elaborates.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention can be with
Implemented using other than the one described here mode, therefore the present invention is not limited by the specific embodiments disclosed below.
As shown in Figure 1, the coverage area of 2G network may be considered entire scope 10 to 12 in deployment of LTE network
All standing, and 3G network may be the continuous covering to range 11 and range 12, LTE network can then be able to achieve 12 high speed of range
The covering of data service.
Need rationally to be arranged the mutual behaviour of LTE and 3G/2G network in conjunction with the progress of LTE for the continuity for guaranteeing customer service
Make principle.And it is further desired that considering how to reduce the introducing of LTE system to greatest extent to original 3G/2G network bring
It influences.
It continues to refer to figure 1, is in range 12 in current service cell, domain business (PS can be grouped based on LTE network
Business), and if user actively initiates that audio call or terminal (UE) are called and paged, and it is logical that terminal receives circuit domain business
Know, circuit domain business can be initiated, carry out CSFB process at this time, is i.e. network falls back to circuit domain by packet domain, and network specifies UE choosing
The 2G cell in range 12 is selected, terminal is resident the 2G cell and is initiated the connection.
Also cell resetting (Cell Change Order) can be carried out based on CSFB process in network side, can specifically referred to
The part of the 8.3.11 chapters and sections of agreement 3GPP TS25.331version9.16.0Release9.
This application provides a kind of cell remapping methods based on circuit domain dropping CSFB, walk with reference to Fig. 2, including as follows
It is rapid:
Step S100 is based on the first communication network in current service cell and is grouped domain business.
When in current service cell, terminal can receive the system information of current service cell broadcast, in the application, when
The network type of preceding serving cell refers exclusively to LTE network, and LTE network only supports data service namely the packet switch domain service.
The adjacent area network type information of current service cell specifically may is that
GSM；
CDMA；
CDMA2000；
WCDMA；
TD-SCDMA；And
LTE。
Wherein, GSM and CDMA belongs to 2G network, and CDMA2000, WCDMA and TD-SCDMA belong to 3G network.2G network and
3G network can support voice service and data service, but data transmission bauds is lower.
The terminal is specifically as follows support multimode terminal, specially mobile phone, laptop, palm PC, vehicle-mounted end
End or other terminals.It is described support multimode terminal refer to supporting simultaneously LTE and it is mentioned above any other a kind of or
The terminal of more than one network type.
In this step, first communication network is LTE network, and terminal is based on LTE network and is grouped domain business,
That is data service.
With continued reference to Fig. 2, the cell remapping method based on circuit domain dropping CSFB further include:
Step S101 falls back to circuit domain by the packet domain if receiving circuit domain business notice, and selecting can be into
To carry out cell resetting, the network type of the first object adjacent area is the second communication for the first object adjacent area of row circuit domain business
Network.
Step S101 is described based on CSFB, the process of network designated area selection.
The type of service of terminal includes: based on voice service and based on data service.
If the service feature of terminal is based on voice service, the net of the target adjacent area to match with the type of service of terminal
Network type is 2G/3G, if based on the service feature type data service of terminal, the mesh that matches with the type of service of terminal
The network type for marking adjacent area is LTE.
In specific implementation, terminal can both execute voice service, can also execute data service.Terminal is at a time
Voice service is executed, then executes data service at another moment.
If the service feature type of terminal is that can specifically refer to that terminal mainly executes voice service based on voice service,
Or execute the application of a certain preference voice service；
If the service feature type of terminal is that can specifically refer to that terminal mainly executes data service based on data service,
Or execute the application of a certain preference data business.
No matter that type of service may all be related to voice service, and terminal can judge whether to connect according to its executive condition
Receive circuit domain business notice:
When terminal executes a certain application, based on voice service, then, even if might have execution data service,
It may be considered and have received circuit domain business notice, the cell for resetting to executable circuit domain business carries out the business of the application
Processing；
When terminal executes a certain application, based on data service, then, when it executes voice service, terminal is then answered
When being considered to have received circuit domain business notice, the cell for resetting to executable circuit domain business is carried out at the business of the application
Reason.
Whether terminal can also initiate audio call by directly detecting terminal or be called, and judge whether executing institute's predicate
Sound business.
When terminal judges that it receives circuit domain business notice, then its application layer initiates circuit domain business, and carries out circuit
Domain dropping process.
With reference to Fig. 3, the reset process of the first object adjacent area may include following steps:
Step S200 receives the system information of current service cell broadcast, carries the current clothes in the system information
The neighboring cell list and the network information for cell of being engaged in.
Step S201, according to the circuit domain business type and the network type of adjacent area, from the current service cell
Neighboring cell list determines the first object adjacent area.
Cell is reset, also the first object adjacent area is determined by network side.The rule of resetting cell can refer to above-mentioned
Content, details are not described herein again.
The cell for carrying out circuit domain business can be 2G cell or 3G cell.Terminal is receiving circuit domain business
When notice, 2G cell is preferentially resided at.
Terminal resets to be resident 2G cell.
In this step, the first object adjacent area be above-mentioned 2G cell, the 2G cell be according to current LTE network (when
Preceding serving cell) the information that is configured of system information by network side selection be that the resetting that LTE network is terminal configuration is small
Area.
With continued reference to Fig. 2, the cell remapping method based on circuit domain dropping CSFB further include:
Step S102 continues to reside in circuit domain if the cell failing-resetting, and the terminal executes cell selection,
And it is connected to the second Target cell that can carry out circuit domain business.
When carrying out cell resetting according to step S101, and when terminal resides at first object cell, terminal attempts connection, but
It is that the first object adjacent area may be not present, it is also possible to there is the adjacent cell with its co-channel interference in the first object adjacent area,
In this case, above-mentioned cell reset process may fail.
In the case where the cell failing-resetting, it is different from the prior art, the terminal network of the application is not retracted point
The LTE network in group domain, and be to continue with and reside in circuit-domain network (can be to continue with and reside at first object cell).
When terminal resides at circuit-domain network cell, terminal voluntarily selects suitable 2G or 3G cell to be resident and the company of trial
It connects.
Fig. 4 is illustrated in the case where step S101 executes cell failing-resetting, and terminal executes the process of cell selection:
Step S300, the neighboring cell list based on the current service cell select second target adjacent area.
In this step, since in the implementation procedure of step S100 and step S101, terminal is based on the current service
The system broadcasts of cell can get 2G the or 3G neighboring cell list of current service cell, in first object adjacent area failing-resetting
When, it can be again based on above-mentioned neighboring cell list, row selection cell is resident and is connected again by terminal.
Its certain selection mode can preferentially be selected according to terminal profile according to certain criterion: for example, can be by terminal
The detection to signal level or signal quality on the subdistrict frequency point in the cell list of historical storage is initiated, selection meets network
Standard (WCDMA network standard be based on RSCP Ec/N0 index, TD-SCDMA network standard be based on RSCP index, and GSM,
GPRS and EDGE network standard are based on RSSI index) historical cell be attached；It may be based on cell load to be connected
It connects.
Certainly, if in step S300, current service cell network provide neighboring cell list selected in cell still without
Method is (the reason of the reason of cell selection failure can be with reference cell failing-resetting) chosen successfully, then with continued reference to Fig. 4, terminal is held
The process of row cell selection further include:
Step S301, the neighboring cell list based on terminal Historic preservation select second target adjacent area.
From the prior art it is found that terminal may to the system broadcasts of received history serving cell store,
In, it is stored with the neighboring cell list of history serving cell entrained in legacy system broadcast.
Terminal, can be with when the neighboring cell list based on current service cell selects the cell failure of executable circuit domain business
The range for expanding selected cell, extends to the neighboring cell list of the history serving cell of terminal storage.Its selection mode can be with base
Selection mode in the neighboring cell list of current service cell is similar: can be initiated by terminal to small in the cell list of historical storage
The detection of signal level or signal quality on area's frequency point, the historical cell that selection meets network standard are attached；It can also base
It is attached in cell load.
However, step S301 is selected and is connected based on the cell in terminal history neighboring cell list, it is also possible to select
It selects unsuccessfully, with continued reference to Fig. 4, terminal executes the process of cell selection further include:
Step S302, terminal are carried out frequency sweep to obtain initial cell list, are selected based on the initial cell list
Second target adjacent area.
In step s 302, terminal is spontaneous has carried out searching network process, the effective frequency point in searching neighboring area, and attempts resident and connect
It connects, it can be ensured that the success of the selection of the second Target cell and connection.
Although the invention has been described by way of example and in terms of the preferred embodiments, but it is not for limiting the present invention, any this field
Technical staff without departing from the spirit and scope of the present invention, may be by the methods and technical content of the disclosure above to this hair
Bright technical solution makes possible variation and modification, therefore, anything that does not depart from the technical scheme of the invention, and according to the present invention
Technical spirit any simple modifications, equivalents, and modifications to the above embodiments, belong to technical solution of the present invention
Protection scope.
Claims (10)
1. a kind of cell remapping method based on circuit domain dropping CSFB characterized by comprising
The first communication network, which is based on, in current service cell is grouped domain business；
If receiving circuit domain business notice, circuit domain is fallen back to by the packet domain, and select that circuit domain business can be carried out
First object adjacent area to carry out cell resetting, the network type of the first object adjacent area is the second communication network；
If the cell failing-resetting, continue to reside in circuit domain, the terminal executes cell selection, and is connected to and can carry out
Second target adjacent area of circuit domain business；The network type of second target adjacent area is the second communication network or third communication net
Network；
It includes: that the neighboring cell list based on the current service cell selects second target adjacent that the terminal, which executes cell selection,
Area；If being connected to the second target adjacent area failure of the neighboring cell list selection based on the current service cell, gone through based on terminal
The neighboring cell list that history saves selects second target adjacent area.
2. the method as described in claim 1, which is characterized in that first communication network and the packet switch domain service type
Match, second communication network and third communication network and the circuit domain business type matching.
3. method according to claim 1 or 2, which is characterized in that first communication network be LTE network, described second
Communication network is 2G network, and the third communication network is 3G network.
4. the method as described in claim 1, which is characterized in that the packet switch domain service is data service, the circuit domain industry
Business is voice service.
5. the method as described in claim 1, which is characterized in that the first object adjacent area is that second communication network is eventually
The cell of configuration is held, second target adjacent area is that terminal is based on second communication network and third communication network voluntarily selects
Cell.
6. the method as described in claim 1, which is characterized in that the selection can carry out the first object adjacent area of circuit domain business
Include:
The system information of current service cell broadcast is received, the adjacent area column of the current service cell are carried in the system information
Table and the network information；
According to the circuit domain business type and the network type of adjacent area, institute is determined from the neighboring cell list of the current service cell
State first object adjacent area.
7. the method as described in claim 1, which is characterized in that cell in the neighboring cell list for the terminal Historic preservation being based on
Network type is the second communication network or third communication network.
8. the method as described in claim 1, which is characterized in that the terminal executes cell selection further include:
If being connected to the second target adjacent area failure of the neighboring cell list selection based on the terminal Historic preservation, terminal is swept
Frequency is to obtain initial cell list；
Second target adjacent area is selected based on the initial cell list.
9. the method as described in claim 1, which is characterized in that if the first object adjacent area is not present or first mesh
Adjacent area is marked in the presence of the adjacent cell with its co-channel interference, then causes to reset to the first object adjacent area failure.
10. such as claim 1,7 and 8 described in any item methods, which is characterized in that if second target adjacent area be not present,
Or there is the adjacent cell with its co-channel interference in second target adjacent area, then cause to be connected to the failure of second target adjacent area.
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| CN201410367532.9A CN105451276B (en) | 2014-07-29 | 2014-07-29 | Cell remapping method based on circuit domain dropping CSFB |
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| CN105451276B true CN105451276B (en) | 2019-06-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106470453B (en) * | 2015-08-21 | 2019-09-17 | 展讯通信（上海）有限公司 | User terminal and its circuit domain fallback method and device |
| CN107343307A (en) * | 2016-04-29 | 2017-11-10 | 展讯通信（上海）有限公司 | User equipment and its network selection method |
| 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 |
| CN106454968B (en) * | 2016-09-08 | 2019-07-26 | Oppo广东移动通信有限公司 | A kind of caller method and device based on CSFB |
| CN107889129B (en) * | 2016-09-30 | 2020-09-04 | 华为技术有限公司 | Telephone response method and terminal |
| CN109429280B (en) * | 2017-08-23 | 2022-06-24 | 展讯通信（上海）有限公司 | Circuit switching domain fallback method and device and user equipment |
| CN108124512B (en) * | 2017-09-30 | 2021-01-22 | 深圳市欢太科技有限公司 | CSFB-based terminal detection method and device and computer storage medium |
| CN107820716B (en) * | 2017-09-30 | 2021-01-08 | 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 |
| WO2019061469A1 (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 csfb fallback result, and computer storage medium |
| CN114245430B (en) * | 2021-12-27 | 2024-10-29 | 维沃移动通信有限公司 | Voice access method and terminal equipment |
| CN116801364B (en) * | 2023-08-22 | 2023-12-15 | Tcl通讯科技（成都）有限公司 | Cell measurement method, device, storage medium and terminal |
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