CN1184832C - Automatic forwarding method for mobile telephone - Google Patents
Automatic forwarding method for mobile telephone Download PDFInfo
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- CN1184832C CN1184832C CN 01122678 CN01122678A CN1184832C CN 1184832 C CN1184832 C CN 1184832C CN 01122678 CN01122678 CN 01122678 CN 01122678 A CN01122678 A CN 01122678A CN 1184832 C CN1184832 C CN 1184832C
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- 238000012546 transfer Methods 0.000 claims description 31
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Abstract
The present invention relates to an automatic switching method for mobile telephones, which comprises that a corresponding contact between the number of a mobile telephone user and the numbers of one or more fixed telephones; the fixed telephones contact a certain mobile telephone region. When a call points to a mobile telephone user, a mobile telephone network determines the position of the mobile telephone user, and automatically judges whether to carry out call diversion and divert onto which fixed telephone. The method defines multiple numbers and whether the forward diversion and the selection of a forward diversion number are automatically completed by a system. The present invention allows users to take part in diversion processes every time, and provides more selections for the users.
Description
Technical field
The present invention relates to a kind of automatic forwarding method for mobile telephone, especially relate to a kind of automatic forwarding method for mobile telephone relevant with the position.
Background technology
Existing call transfer service, can make mobile phone in shutdown, the line is busy, under out of reach or the situation such as refusal incoming call answering etc., incoming call is transferred on the predefined number of mobile phone user.Predefined number is generally a fixed telephone number, but also can be another Mobile Directory Number.The telephone number of transferring to is generally a certain number that the mobile phone user sets at its mobile phone.It is the transferred number that is provided with by manual operations by the user, and a transferred number can only be set at every turn.When not required, cancel forward-shifting service by manual operations again.So the user need manually be provided with repeatedly, cancel; This operation lacks necessary flexibility.
Summary of the invention
The purpose of this invention is to provide a kind of automatic forwarding method for mobile telephone, this method is made judgement according to the residing position of mobile phone user, and automatic as required electrotransfer in the future is to corresponding landline telephone.
According to a kind of automatic forwarding method for mobile telephone of the present invention, comprising:
A) mobile phone user's the number and the number of one or more landline telephones are set up corresponding relation;
B) each described landline telephone and certain mobile phone zone are set up accordingly got in touch;
C) when an incoming call points to described mobile phone user, mobile telephone network will be determined the scope in the mobile phone zone at described mobile phone user place;
D) judge that whether one of them has accordingly and gets in touch with described landline telephone in described mobile phone user region, if do not have, then mobile telephone network with this call proceeding to described mobile phone;
E) if corresponding fixed telephone number is arranged, inquire then whether the user transfers to this calling on the corresponding landline telephone, if the user selects not change, then mobile telephone network arrives described mobile phone with this call proceeding;
F) if the user selects to shift, then mobile telephone network is transferred to this calling on the corresponding landline telephone.
In above-mentioned automatic forwarding method for mobile telephone, if said mobile phone user has selected transfer, and described mobile phone user region and the above landline telephone have corresponding the contact, inquire that then called mobile phone user transfers to this calling on the landline telephone of which corresponding contact; After the user selected, mobile telephone network was then transferred to this calling on the user-selected fixed landline telephone that corresponding contact is arranged.
In above-mentioned automatic forwarding method for mobile telephone, if said mobile phone user converses, and preestablished and called forward on busy, and described mobile phone user region and certain described landline telephone have corresponding the contact, and mobile telephone network is then transferred to this calling on the user-selected fixed landline telephone that corresponding contact is arranged automatically.
In above-mentioned automatic forwarding method for mobile telephone, mobile telephone network is determined the scope of described mobile phone user region, can obtain in the following manner: cell positioning method; Moving table measuring is from the time difference of different signal of base station; And by the additional GPS device of travelling carriage.
Automatic forwarding method for mobile telephone provided by the invention judges whether automatically to carry out calling transfer according to the position at user place, and where transfers to; And allow the user to participate in each transfer process, thereby provide more choices for the user.
In addition,, use landline telephone to come incoming call answering, can reduce user's cost of the phone call by transferring to landline telephone for the calling of mobile phone; And cover bad words at wireless signal and come incoming call answering, can reduce user's cost of the phone call; And in the bad place of wireless signal covering, in office building, landline telephone can provide speech more clearly, and speech quality is better; Reduce mobile phone and use, the potential healthhazard that the electromagnetic radiation in the time of can avoiding using mobile phone communication may bring human body.For operator, can attract the user by differentiated business is provided, and improve user's loyalty.
Description of drawings
Fig. 1 has represented the related PSTN network of calling transfer example, entity situation in the GSM network;
Fig. 2 A and 2B have provided main communication network entity MSC/VLR, SCP, LE, the signalling interactive process between the GMSC.
Embodiment
When application was of the present invention, mobile phone user's number can be set up corresponding contact with the number of one or more landline telephone.These landline telephones can be different on the position.When this mobile phone user was pointed in a call, mobile telephone network equipment was at first determined the regional extent at this user place; If the zone at the current place of user is the mobile phone zone that corresponding relation is arranged with some landline telephones of choosing in advance, mobile telephone network will point out the user to have calling to arrive so, and near the fixed telephone number of choosing in advance whether the inquiry user needs to forward the call to, go to answer calling.Make the decision of whether shifting by the user.If the user selects to shift, mobile telephone network equipment will forward the call on this fixed telephone number, and the prompting user has the arrival of calling on this corresponding landline telephone, answers calling up to the user.If the user selects not shift, mobile telephone network equipment will be this call proceeding to travelling carriage, as the telephone connection process.
Carry out the automatic telephone transfer service, requiring has the localization method of certain precision as support.If the locating information precision is too low, this business is just nonsensical.The position of considering landline telephone itself neither be accurately constant, if positioning accuracy can reach 10 meters, it is very desirable that yes, but high-precision location technology all means the increase of complex apparatus and cost to network operator and/or travelling carriage itself.
The method that multiple acquisition positional information of mobile subscriber is arranged, the order of accuarcy of the positional information that every kind of method obtained are also all different, and along with the raising of accuracy, the complexity of equipment has increased.In the mobile communication system there be typical localization method: (1) cell localization technology: according to determining the position of travelling carriage with the cell range of the service of the base station of mobile communications, if cell range bigger (radius is more than 500 meters) can be improved locating accuracy by the measurement to Timing Advance and received signal intensity; (2) time difference measurements (Observed TimeDifferences); The signal of base station of 3 different districts of moving table measuring can obtain locating information to the difference in the propagation time of travelling carriage by the processing to measurement data; (3) (Global Positioning System, GPS) assist location promptly obtain high-precision locating information by global positioning system apparatus additional on travelling carriage to GPS.In Release 99 standards that the 3GPP of 3G (Third Generation) Moblie standardization body works out, the positioning accuracy of requirement is 50 meters.When enforcement is of the present invention, can adopt different location technologies as required.
Adopt the coverage of this scope of cell localization and sub-district suitable substantially.Cell range is more little, and positioning accuracy is high more, and in the sector cell that adopts directional antenna, positioning accuracy is than the sub-district height that adopts omnidirectional antenna.This method biggest advantage be to travelling carriage without any specific (special) requirements, not high to the equipment requirements of operator.Existing mobile communication network just can be supported this location technology.In addition, cell localization is than additive method, and the availability of service is higher, requires travelling carriage can see the base station of 3 sub-districts such as time difference measurements, has limited its use, and the GPS assist location can't be used indoor.
Based on being positioned in the city scope of sub-district, the distance between the base station has only 300 ~ 500 meters; At traffic intensive shopping centre and Administrative Area, the distance between the base station has only tens meters even littler.In these places, just can obtain more high-precision locating information by simple cell localization; Such precision is enough for carrying out the automatic telephone transfer service.In addition by select whether diverting call by the user, can avoid the lower and problem brought of positioning accuracy.
When enforcement is of the present invention, can be by the program of upgrading/modification network equipment, this may relate to revises mobile switch (MSC) and user attaching location register (HLR).Can also utilize intelligent network, and needn't the program of mobile switch be made amendment, just can introduce this business apace.
Example below in conjunction with network shown in Figure 1 illustrates enforcement a kind of operating process of the present invention.The position measurement process of additional special user terminal not in this example, user's position is by network equipment, obtains according to the sub-district at the place, base station of serving the user in the process of user terminal response paging.
The network of supposing is: (1) mobile network adopts global system for mobile communications GSM; (2) based on the intelligent network of CAMEL PHASE 2 (Customised Applications for Moblie NetworkEnhanced Logic Phase 2, i.e. CAMEL second stage) standard, its automatic Call Forwarding services are based on the signing service of CAMEL; (3) there is not special positioner in the network.The user who makes a call can be the telephone subscriber of any kind, supposes that the user who makes a call is a fixed telephone subscriber.Called mobile subscriber is the contracted user of the automatic forward-shifting service of CAMEL.
What Fig. 1 represented is the related public telephone network (PSTN) of calling transfer example of the present invention, the entity situation in the GSM network.Wherein, LE represents Local Exchange, local switch.LE1 is the local switch that sends the user B place of calling; LE2 is the relevant affiliated local switch of landline telephone of mobile phone user A position.When user B sent calling, the calling of being sent continued by local switch LE1.
Among Fig. 1, symbol GMSC is Gateway Mobile Switching Center, i.e. gateway MSC.When mobile phone user A when called, the calling that user B sends enters mobile network through gateway MSC.Symbol M SC/VLR is MobileSwitching Center/Visitor Location Register, i.e. mobile switching center among the figure.The main effect of mobile switching centre is that calling procedure is controlled, and the effect of VLR Visitor Location Register is the data that storage roams into the mobile phone user A in its area under one's jurisdiction.By mobile switching center, the calling that user B sends is sent to BSC, i.e. Base Station Controller, and base station controller then, is sent to BTS, i.e. Base Station, base station.The Serving cell of this base station has covered the position at the current place of mobile subscriber A.Thus, the calling of sending by base station user B is sent to as called mobile phone user A.
Gateway MSC GMSC will get in touch with HLR (being Home Location Register, attaching position register), understand the essential information that leaves called subscriber A wherein in, comprise the CAMEL-Subscription-Information (CSI) of CAMEL business.Gateway MSC GMSC also will with SCP, i.e. Service Control Point, service control point contact.It is the core that realizes IN service.Service control point is got in touch with HLR and GMSC respectively, with the execution of control CAMEL service logic.Mobile telephone network is determined the scope of described mobile phone user A region, can obtain in the following manner: cell positioning method; Moving table measuring is from the time difference of different signal of base station.After the zone of the mobile phone at called mobile phone user A place is determined, determine the regional therewith landline telephone (only exemplarily showing landline telephone N among the figure) that interrelates, then, inquire that called mobile phone user A transfers to this calling on the landline telephone of which corresponding contact; After the user selects, for example selected to have the landline telephone N of corresponding contact, then mobile telephone network is transferred to this calling on the selected landline telephone N of user A.Like this, can be with near previously selected landline telephone N by the called mobile phone user A of calling transfer, and by local switch LE2, be connected on the gateway MSC GMSC, receive the incoming call of user B.
If said mobile phone user A converses among this embodiment, and preestablished and called forward on busy, and mobile phone user A region and certain landline telephone N have corresponding the contact, and then mobile telephone network can also be transferred to this calling on the selected landline telephone N that corresponding contact is arranged of user A automatically.
In this embodiment, the zone of the mobile phone at called mobile phone user A place is that the service area of the BTS by serving this user is determined.In addition, need to prove GSMSSF, i.e. GSM Service Switch Function.This is the part of GMSC and MSC/VLR, does not show among the figure.By GSM SSF, gateway MSC GMSC and MSC/VLR finish mutual with SCP, and accept the control of SCP.
Fig. 2 A and 2B have provided main entities MSC/VLR, SCP, LE, the signalling interactive process between the GMSC.Can be illustrated with following simple description by means of symbol.
(1) user B is routed among the GMSC through LE1 for the calling of user A;
(2) T-CSI of GMSC inquiring user A from the HLR that mobile phone user A is belonged to (Terminating CAMEL Subscription Information, terminal CAMEL Subscription Information);
(3) HLR sends the T-CSI of user A to GMSC;
(4) processing of GMSC interrupt call is set up the CAMEL control relation with the SCP that determines among the T-CSI, the indication of request and wait SCP;
(5) SCP indication GMSC continues BCSM (the basic call state model) incident in continuing of calling and the supervising connections for calling process, notifies SCP after detecting incident;
(6) GMSC is with the MSC of call proceeding to user A place;
(7) MSC initiates paging to user A, and user A is replied; Network equipment BSC and BTS according to corresponding paging in the process of user A answer page obtained the current place location information of cell of user A, upgraded the data among the HLR; MSC hangs up calling procedure simultaneously to this incident of SCP report user answer, waits for the indication of SCP;
(8) SCP analyzes the position that user A is current to the current position of HLR inquiry mobile subscriber A; If it is corresponding related that the position that the user is current and some fixed telephone number N of user's registration have, the step (9) below continuing (this just situation of flow process for example); Otherwise carry out the step (12) of back;
(9) start automatic calling transfer flow process, SCP indication GMSC plays voice suggestion to user A, and whether the inquiry user transfers to call on the landline telephone N;
(10) user A can make a choice by terminal push after receiving inquiry, and GMSC reports to SCP to the selection of user A.If the user selects to carry out calling transfer, execution in step (11) (flow process shown in the figure is that the user has selected situation about shifting); If the user selects not carry out calling transfer, execution in step (12)
(11) SCP indication GMSC sets up and being connected of said landline telephone N, being connected of the portable terminal of cut-out and user A; Look the length of switching process, SCP can play voice suggestion to user B by instruct MS C, please wait for by user B;
(12) SCP indication GMSC continues the travelling carriage of calling out that is routed to mobile subscriber A;
(13) thus user A replys or finishes with the travelling carriage answering call connection of the speech channel between user B and the user A with landline telephone N off-hook.
In above-mentioned automatic forwarding method for mobile telephone, if described mobile phone user region and the above landline telephone (as, landline telephone N and other landline telephone not shown in the figures) corresponding contact arranged, and said mobile phone user A has selected transfer, and then further the called mobile phone user A of inquiry transfers to this calling on the landline telephone of which corresponding contact; After the user selected, mobile telephone network was then transferred to this calling on the user-selected fixed landline telephone that corresponding contact is arranged.
In this example, consideration be complicated situation, that is: 1) GSMC and VMSC (Visiting Mobile Switching Center, the i.e. MSC at the current place of user A) be different entities; 2) variation has taken place in the position of callee A after last calling once, and the position of the mobile subscriber A that stores among the HLR when promptly calling out beginning is inaccurate.Therefore SCP must obtain the positional information accurately of mobile subscriber A from HLR after called subscriber A replys the updating location information of user A among the HLR, makes the judgement that whether starts transfer flow in view of the above.Particularly, (Detection Point 15, the test point that defines among the CAMEL is corresponding to point in call: terminal responds) be EDP-R (event detection point-request) should to dispose DP15 in SCP.
In addition, in above-mentioned example, expanded the CAP signaling, increased: Release Call Leg and Connect Call Leg.The effect of Release Call Leg is the control relation that keeps original, but a branch, caller branch or the called branch of call release.Connect CallLeg couples together two branches of calling out, and becomes a calling.
In addition, in above-mentioned example, mentioned the use voice suggestion.But this is not necessary.System can distribute the voice service channel for the mobile subscriber, and finish on the signaling channel and the user between the inquiry selection course.
Compare with technology in the past, the common preceding commentaries on classics of prior art is by manual operations transferred number to be set by the user, and a transferred number can only be set at every turn, when not required, cancels forward-shifting service by manual operations again.And automatic forward-shifting service of the present invention can define a plurality of numbers, and whether before carrying out the selection of commentaries on classics and transferred number is finished automatically by system.The preceding number that changes is relevant with mobile subscriber's current location; The acquisition of positional information can obtain in several ways according to the situation of network and terminal.Preceding right to choose of changeing is the user, and system finishes system and user's query by different modes, and the reciprocal process of replying.Like this, just, can make things convenient for, set up in time, exactly the contact between calling party and the quilt calling mobile phone user.
The standard of the realization of this business and concrete communication system is irrelevant, can be used in the existing various mobile communication system, and as AMP, D-AMPS, GSM is in CDMA and the 3-G (Generation Three mobile communication system).This business can independently be used, perhaps combine and derive from the business make new advances with existing business, such as with the divert when busy combination.Imagine a mobile subscriber just at the Administrative Area mobile terminal call, call out arrival in addition one, this is called out before automatically and forwards on the landline telephone of office, and this is called out just can be by other staff's processing of office.
Protection range of the present invention is illustrated in the appended claims.But every within aim of the present invention, conspicuous modification is also due within protection scope of the present invention.
Claims (10)
1. automatic forwarding method for mobile telephone is characterized in that described method comprises:
A) setting up a mobile phone user's the number and the number of one or more landline telephones gets in touch accordingly;
B) set up corresponding contact the in each described landline telephone and certain mobile phone zone;
C) when calling out the described mobile phone user of sensing for one, mobile telephone network will be determined the scope in the zone at described mobile phone user place;
D) judge whether one of them has corresponding the contact with described landline telephone in described mobile phone user region, if there is not desired corresponding contact, then mobile telephone network arrives described mobile phone with this call proceeding;
E) if desired corresponding contact is arranged, inquire that whether called mobile phone user transfers to this calling on the described landline telephone that corresponding contact arranged, if said mobile phone user selects not shift, then mobile telephone network arrives described mobile phone with this call proceeding;
F) if said mobile phone user has selected transfer, mobile telephone network is then transferred to this calling on the described landline telephone that corresponding contact arranged.
2. automatic forwarding method for mobile telephone as claimed in claim 1 is characterized in that: in the described step c), mobile telephone network is determined the scope of described mobile phone user region, obtains by cell positioning method.
3. automatic forwarding method for mobile telephone as claimed in claim 1, it is characterized in that: in the described step c), mobile telephone network is determined the scope of described mobile phone user region, is to obtain by the time difference of moving table measuring from different signal of base station.
4. automatic forwarding method for mobile telephone as claimed in claim 1 is characterized in that: in the described step c), mobile telephone network is determined the scope of described mobile phone user region, is to obtain by the additional GPS device of travelling carriage.
5. automatic forwarding method for mobile telephone as claimed in claim 1, wherein said step f) further comprises:
F1) if said mobile phone user has selected transfer, and described mobile phone user region and the above landline telephone have corresponding the contact, inquire that then called mobile phone user transfers to this calling on the landline telephone of which corresponding contact; And
F2) after the user selected, mobile telephone network was then transferred to this calling on the user-selected fixed landline telephone that corresponding contact is arranged.
6. automatic forwarding method for mobile telephone is characterized in that described method comprises:
A) setting up a mobile phone user's the number and the number of one or more landline telephones gets in touch accordingly;
B) set up corresponding contact the in each described landline telephone and certain mobile phone zone;
C) when calling out the described mobile phone user of sensing for one, mobile telephone network will be determined the scope in the zone at described mobile phone user place;
D) judge whether described mobile phone user region has corresponding the contact with described landline telephone, if there is not desired corresponding contact, then mobile telephone network arrives described mobile phone with this call proceeding;
E) one of them has desired corresponding the contact if described mobile phone user's number is only with described landline telephone, inquire that whether called mobile phone user transfers to this calling on the described landline telephone that corresponding contact arranged, if said mobile phone user selects not shift, then mobile telephone network arrives described mobile phone with this call proceeding;
F) if said mobile phone user has selected transfer, mobile telephone network is then transferred to this calling on the described landline telephone that corresponding contact arranged;
G) if desired corresponding the contact arranged with a described above landline telephone, inquire that whether called mobile phone user transfers to this calling on the described landline telephone that corresponding contact arranged, if said mobile phone user selects not shift, then mobile telephone network arrives described mobile phone with this call proceeding;
H), inquire that then called mobile phone user transfers to this calling on the landline telephone of which corresponding contact if said mobile phone user has selected transfer; And
I) after the user selected, mobile telephone network was then transferred to this calling on the user-selected fixed landline telephone that corresponding contact is arranged.
7. automatic forwarding method for mobile telephone as claimed in claim 6 is characterized in that: in the described step c), mobile telephone network is determined the scope of described mobile phone user region, obtains by cell positioning method.
8. automatic forwarding method for mobile telephone as claimed in claim 6, it is characterized in that: in the described step c), mobile telephone network is determined the scope of described mobile phone user region, is to obtain by the time difference of moving table measuring from different signal of base station.
9. automatic forwarding method for mobile telephone as claimed in claim 6 is characterized in that: in the described step c), mobile telephone network is determined the scope of described mobile phone user region, is to obtain by the additional GPS device of travelling carriage.
10. automatic forwarding method for mobile telephone is characterized in that described method comprises:
A) setting up a mobile phone user's the number and the number of one or more landline telephones gets in touch accordingly;
B) set up corresponding contact the in each described landline telephone and certain mobile phone zone;
C) when calling out the described mobile phone user of sensing for one, mobile telephone network will be determined the scope in the zone at described mobile phone user place;
D) judge whether described called mobile phone is conversed,, then carry out step e), if called mobile phone then carries out step g) not in conversation if called mobile phone is conversed;
E) judge whether one of them has corresponding the contact with described landline telephone in described mobile phone user region, if do not have desired corresponding contact then stop this calling procedure;
F) if desired corresponding contact is arranged, and said mobile phone user is provided with and calls forward on busy, and then carries out step I);
G) judge whether one of them has corresponding the contact with described landline telephone in described mobile phone user region, if there is not desired corresponding contact, then mobile telephone network arrives described mobile phone with this call proceeding;
H) if desired corresponding contact is arranged, inquire that whether called mobile phone user transfers to this calling on the described landline telephone that corresponding contact arranged, if said mobile phone user selects not shift, then mobile telephone network arrives described mobile phone with this call proceeding; If said mobile phone user has selected transfer, then carry out next step; With
I) mobile telephone network is then transferred to this calling on the described landline telephone that corresponding contact arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01122678 CN1184832C (en) | 2001-06-30 | 2001-06-30 | Automatic forwarding method for mobile telephone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01122678 CN1184832C (en) | 2001-06-30 | 2001-06-30 | Automatic forwarding method for mobile telephone |
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|---|---|
| CN1394061A CN1394061A (en) | 2003-01-29 |
| CN1184832C true CN1184832C (en) | 2005-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01122678 Expired - Fee Related CN1184832C (en) | 2001-06-30 | 2001-06-30 | Automatic forwarding method for mobile telephone |
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| CN (1) | CN1184832C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100488303C (en) * | 2004-04-08 | 2009-05-13 | 深圳市点睛科技有限公司 | Method of terminal and called communication with mobile terminal relation |
| CN100442698C (en) * | 2005-12-16 | 2008-12-10 | 华为技术有限公司 | Method for realizing service based on packet |
| WO2008054194A1 (en) * | 2006-11-03 | 2008-05-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Method of conditionally routing a call made to a fixed telephone number |
| US8774386B2 (en) | 2007-03-01 | 2014-07-08 | Mitel Networks Corporation | System and method for call initiation using availability information |
| CN101179770B (en) * | 2007-11-29 | 2010-06-23 | 中兴通讯股份有限公司 | Method and system for switchboard controlled call diversion in mobile communication system |
| CN101631273B (en) * | 2009-07-09 | 2012-06-06 | 中兴通讯股份有限公司 | Method and device for changing call forwarding service |
| CN101651937B (en) * | 2009-09-09 | 2014-08-20 | 中兴通讯股份有限公司 | Dynamic content distribution (DCD) service transfer method and device |
| CN102273235B (en) * | 2011-05-24 | 2014-04-02 | 华为终端有限公司 | Method and terminal device for setting call transfer function |
| CN104159207A (en) * | 2014-07-21 | 2014-11-19 | 西安明讯电子信息科技有限公司 | Mobile phone call transfer application method |
| US10306070B2 (en) | 2014-07-29 | 2019-05-28 | Huawei Technologies Co., Ltd. | Call transfer method and user equipment |
| CN105916129A (en) * | 2016-06-27 | 2016-08-31 | 北京小米移动软件有限公司 | Call processing method and device, as well as call terminal and system |
| CN107295200A (en) * | 2017-08-03 | 2017-10-24 | 武汉远众科技有限公司 | A kind of automatic telephone transfer method |
-
2001
- 2001-06-30 CN CN 01122678 patent/CN1184832C/en not_active Expired - Fee Related
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| CN1394061A (en) | 2003-01-29 |
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