CN101175330B - Different system switching method for double-module double-standby terminal - Google Patents
Different system switching method for double-module double-standby terminal Download PDFInfo
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Abstract
The present invention discloses the different-system switching method of a dual-mode dual-standby terminal. When the signal quality of a 3G network is lower than a pre-set threshold according to the judgment of the 3G module in the dual-mode dual-standby terminal, the 3G module informs the 2G module in the dual-mode dual-standby terminal; and the 2G module sends a special call request message to the network side entity of the 2G module. The network side entity of the 2G network receives the special call request message and directly distributes the network resource of the 2G network to the dual-mode dual-standby terminal and processes the corresponding follow-up switching processing. The present invention can smoothly switch the processing communication to the 2G network when the dual-mode dual-standby terminal is located at the place where the covering signal of the 3G network is not good.
Description
Technical field
The present invention relates to different system handoff technique, particularly the different-system switching method of double-module double-standby terminal.
Background technology
System arranges net the initial stage at 3G (Third Generation) Moblie (3G), 3G network can only be to provide discontinuous focus to cover on the basis that 2G the whole network covers, for continuous covering is provided, just need terminal and network all to support different system (RAT) to switch from 3G network to the 2G network.In order to satisfy the demand, dual-mode single-standby terminal and double-module double-standby terminal arise at the historic moment.The global system for mobile communications (GSM) that inserts in (TD-SCDMA) system and the 2G system with the tdd CDMA in the 3G system is that example describes below.
TD/GSM dual-mode single-standby terminal is supported TD-SCDMA and two kinds of patterns of GSM, under these two kinds of patterns, use same number, can under idle condition, automatically carry out the mode switch between TD-SCDMA and the GSM, thereby can carry out carrying out the RAT measurements in the process in communication, and then carry out the switching of different system.Existing TD/GSM dual-mode single-standby terminal is carried out in the process in TD-SCDMA communication, and the method that switches to the GSM network from the TD-SCDMA network may further comprise the steps:
The 1st step: TD/GSM dual-mode single-standby terminal is carried out in the process in TD-SCDMA communication, the signal quality of measure GSM adjacent regions, when the signal strength signal intensity of GSM adjacent area surpasses certain thresholding, report the report of RAT measurements to radio network controller (RNC) by base station (Node B).Wherein, Node B and RNC are the 3G Access Networks--the network entity in the RNS (RNS).
The 2nd step: RNC carries out switch decision according to the measurement report received, and in the result of switch decision when switching, to mobile switching centre (MSC) transmission RELOCATION REQUEST message, with described GSM adjacent area as target GSM cell notification MSC.
In the description in above-mentioned the 2nd step, suppose that described MSC is the shared network side switching entity of 3G network and 2G network, that is to say, this shared MSC both can be used as the network side switching entity and had communicated by letter with RNS in the 3G network, also can be used as network side switching entity and 2G Access Network--and base station sub-system (BSS) is communicated by letter.Wherein, BSS comprises base station controller (BSC) and base station (BTS).
In actual applications, the MSC of 3G network and 2G network also can be provided with respectively, and at this moment, the MSC of 3G network communicates by letter with RNS, and the MSC of 2G network communicates by letter with BSS, and the information interaction between 3G network and the 2G network will be undertaken by the MSC of 3G network and the MSC of 2G network.
The 3rd step: MSC initiates handoff request to the BSC at place, target GSM sub-district, and is this TD/GSM dual-mode single-standby terminal distribution land circuit.
The 4th step: target BS C is this TD/GSM dual-mode single-standby terminal distribution interface-free resources, and sends switching request response to MSC, expression resource allocation success.
The 5th step: MSC initiates switching command by source RNC (i.e. Serving RNC in the current TD-SCDMA network of living in of this TD/GSM dual-mode single-standby terminal) to this TD/GSM dual-mode single-standby terminal.
The 6th step: this TD/GSM dual-mode single-standby terminal switches to the GSM pattern, and MSC switches to the GSM side with speech channel, and discharges the related resource of TD-SCDMA side.
So far, finish of the switching of TD/GSM dual-mode single-standby terminal from the TD-SCDMA network to the GSM network.
Above-mentioned TD/GSM dual-mode single-standby terminal requires the essential RAT of support of terminal measurements from the method that the TD-SCDMA network switches to the GSM network, otherwise can't realize.And, said method on the one hand need eat dishes without rice or wine to increase measurement control order and measurement reports process, on the other hand, need be carried out switch decision and initiate handoff request according to the measurement report of terminal to report by RNC, cause switching flow comparatively complicated, the time that switching is spent is longer.
The TD/GSM double-module double-standby terminal is supported TD-SCDMA and two kinds of modes coexist of GSM, comprises TD module and gsm module in the TD/GSM double-module double-standby terminal, is respectively applied for to handle described terminal communication under the TD-SCDMA pattern and communicating by letter under the GSM pattern.Described TD/GSM double-module double-standby terminal uses TD-SCDMA number and GSM number to communicate respectively under these two kinds of patterns, can reside in simultaneously on the sub-district of these two kinds of different modes, and under these two kinds of patterns receiving and transmitting signal simultaneously.But, this kind of terminal does not support idle condition and communication to carry out the RAT measurements in the process, do not support switching command between RAT, so can not adopt above-mentioned TD/GSM dual-mode single-standby terminal to carry out the switching of different system from the method that the TD-SCDMA network switches to the GSM network yet.
In order to solve the TD/GSM double-module double-standby terminal switches to the GSM network from the TD-SCMA network in communication process problem, usually the method for taking is: when the TD/GSM double-module double-standby terminal moves to TD-SCDMA network coverage edge, voice communication quality will degenerate along with the signal quality variation, at this moment, the TD/GSM double-module double-standby terminal can point out the user to finish the communication of TD-SCMA side, and use the GSM number to initiate new calling at the GSM network by GSM, rebulid communication.This method can't guarantee the continuity of telex network to cause user experience relatively poor at the TD-SCMA network edge.
As seen by above-mentioned, the current communication that prior art need be interrupted double-module double-standby terminal could realize switching to the 2G network from 3G network, causes double-module double-standby terminal ongoing communication can't be switched to the 2G network by 3G network smoothly.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of different-system switching method of double-module double-standby terminal, can described double-module double-standby terminal be in the 3G network signal cover bad local time, ongoing communication is switched to the 2G network smoothly.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of different-system switching method of double-module double-standby terminal is used for described double-module double-standby terminal is switched to second generation mobile communication 2G network in the ongoing communication of 3G (Third Generation) Moblie 3G network, comprising:
A, when the 3G module in the double-module double-standby terminal judges that the signal quality of 3G network is lower than the thresholding that sets in advance, notify the 2G in the described double-module double-standby terminal module;
B, described 2G module send the special calling request message according to the notice of described 3G module to 2G network of network side entity;
C, if described 2G network of network side entity is received described special calling request message, then be described double-module double-standby terminal distribution 2G network of network resource;
The network side entity of D, described double-module double-standby terminal, 2G network of network side entity and 3G network switches to the ongoing communication in 3G network of described double-module double-standby terminal in the described 2G network of network resource and to carry out.
The described 2G module of step B sends the special calling request message to 2G network of network side entity and comprises:
The information that the 2G module will make described 2G network of network side entity determine that the ongoing communication in 3G network of described double-module double-standby terminal need switch to the 2G network is carried in the call request message, and described call request message is sent to described 2G network of network side entity.
Before described step C, further comprise:
After described 2G network of network side entity is received call request message, determine that according to the described 2G network of network side entity that makes that carries in the described call request message described double-module double-standby terminal ongoing communication needs in 3G network switch to the information of 2G network, judge that the described call request message of receiving is the special calling request message.
Described 2G network of network side entity comprises: the base station sub-system BSS at moving exchanging center MSC and the current 2G cell of living in of described double-module double-standby terminal place;
The described 2G network of network of step C side entity is that described double-module double-standby terminal distributes 2G network of network resource to comprise:
C1, described MSC are that described double-module double-standby terminal distributes land circuit, and send assignment request message to described BSS;
C2, described BSS are that described double-module double-standby terminal distributes interface-free resources, and notify described double-module double-standby terminal by channel assignment message with the interface-free resources of described distribution.
Described 2G network of network side entity comprises: the BSS at MSC and the current 2G cell of living in of described double-module double-standby terminal place; The network side entity of described 3G network comprises: the RNS RNS at MSC and place, the current 3G of living in sub-district of described double-module double-standby terminal;
Described step D comprises:
D1, described double-module double-standby terminal switch to the 2G channel according to the interface-free resources of described distribution, set up synchronously with described BSS;
D2, described BSS send assignment to described MSC and finish message;
D3, MSC be according to the 2G number of preserving and the binding relationship of 3G number, and the speech channel between described 3G number and the Correspondent Node user is switched to speech channel between described 2G number and the Correspondent Node user;
D4, MSC notice RNS is released to the Internet resources of the 3G network of described double-module double-standby terminal distribution.
The binding relationship of described 2G number and 3G number is notified 2G network of network side entity by described double-module double-standby terminal by registration message, and is preserved by 2G network of network side entity.
The binding relationship of described 2G number and 3G number is set in advance and is preserved by 2G network of network side entity.
The information that described 2G module will make described 2G network of network side entity determine that the ongoing communication in 3G network of described double-module double-standby terminal need switch to the 2G network is carried in the call request message and is:
Described 2G module is changed to the special number that sets in advance with the called number in the described call request message, and calling number is changed to the 2G number of described double-module double-standby terminal.
The described special number that sets in advance sets in advance in described double-module double-standby terminal and 2G network of network side entity.
Before described steps A, further comprise:
Described 3G module is periodically measured the signal quality of 3G network, and the signal quality and the described thresholding that sets in advance of the described 3G network that measures compared.
As seen from the above technical solution, the 3G module of the present invention in double-module double-standby terminal judged when the signal quality of 3G network is lower than the thresholding that sets in advance, take to notify the module of the 2G in this double-module double-standby terminal, and sent the mode of special calling request message by the 2G module to 2G network of network side entity; And 2G network of network side entity has been taked directly to distribute 2G network of network resource for this double-module double-standby terminal after receiving described special calling request message, and carries out the mode of corresponding subsequent hand-off process.
The technical scheme that the invention described above provided is compared with the changing method of the described existing dual-mode single-standby terminal of background technology, difference is: on the one hand, switch decision is to be made according to the signal quality situation of 3G network by the 3G module in the double-module double-standby terminal, need not terminal and carry out the RAT measurements, also need not terminal and report the report of RAT measurements, more do not need RNC to carry out switch decision to RNC; On the other hand, after decision is switched, be initiatively to initiate special call request message to network side by the 2G module in the double-module double-standby terminal, and directly be that this double-module double-standby terminal distributes 2G network of network resource according to the particularity of described call request message, and carry out the corresponding subsequent hand-off process by network side; Thereby make that technical scheme of the present invention does not need to eat dishes without rice or wine to make any change to existing, also simplified switching flow, reduced and switched the time that is spent.
The technical scheme that the invention described above provided is compared with the changing method of the described existing double-module double-standby terminal of background technology, can make the imperceptible call drop of user, thereby realizes the smooth migration of communication.
Description of drawings
Fig. 1 is the schematic flow sheet of the different-system switching method of double-module double-standby terminal of the present invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
Main thought of the present invention is when the 3G module in the double-module double-standby terminal judges that the signal quality of 3G network is lower than the thresholding that sets in advance, 2G module in this double-module double-standby terminal sends handoff request message, sends the special calling request message by the 2G module to 2G network of network side entity; The special calling request message of being received by 2G network of network side entity basis directly is that this double-module double-standby terminal distributes 2G network of network resource then; At last, by the network side entity of this double-module double-standby terminal, 2G network of network side entity and 3G network, the ongoing communication in 3G network of this double-module double-standby terminal switched in the 2G network of network resource of being distributed carry out.
Fig. 1 is the schematic flow sheet of the different-system switching method of double-module double-standby terminal of the present invention.Referring to Fig. 1, different system of the present invention switches related network entity and comprises: MSC, RNS and BSS.Present embodiment is an example with 2G network and the shared MSC of 3G network, for 2G network and 3G network the application scenarios of MSC is set respectively, can carry out with reference to present embodiment and the follow-up respective description of the present invention.The inventive method shown in Figure 1 may further comprise the steps:
Step 101: double-module double-standby terminal is current to be in the 3G network, is carrying out communicating with the Correspondent Node user, and when communicating, double-module double-standby terminal is periodically measured the signal quality of 3G network.
Step 102: when the 3G module in the double-module double-standby terminal judged that the poor signal quality of 3G network arrives to a certain degree, decision was switched to the GSM network that closes on, and initiatively initiates handoff procedure.
As stated in the Background Art, an example of double-module double-standby terminal: comprise TD module and gsm module in the TD/GSM double-module double-standby terminal, correspondingly, comprise 3G module and 2G module in the described double-module double-standby terminal of present embodiment, be respectively applied for and handle double-module double-standby terminal communication under the 3G pattern and communicating by letter under the 2G pattern.
Can set in advance the signal quality thresholding, when the signal quality of the 3G network that measures when the 3G module in the double-module double-standby terminal is lower than the described signal quality thresholding that sets in advance, poor having arrived to a certain degree of signal quality of 3G network can be judged, at this moment, handoff procedure can be initiatively initiated.
In this step, the active switching of being initiated is exactly: the 3G module notice 2G module of double-module double-standby terminal inside, described notice represents that the current ongoing communication of double-module double-standby terminal need switch to the 2G network from 3G network.The implementation of described notice can be: the 3G module sends call handover request message to the 2G module.
In terminal equipment, can communicate by the intercommunication interface of terminal between each internal module, therefore, the described call handover request message of this step just can be by the communication interface transmission between 3G module and the 2G module.When specific implementation, can define a new message as described call handover request message, also can carry out after the respective extension can certainly adopting other modes to realize to existing message as described call handover request message.
Step 103a～step 103b:2G module sends the special calling request message according to the notice of 3G module to 2G network of network side entity.
Relevant regulations according to existing GSM standard, the calling that terminal is initiated all will pass to MSC by BTS and BSC and handle call request message (SetupRequest) among the step 103a and the call management service request among the step 103b (CM Service Request) as shown in Figure 3.Easy for describing, among the figure BTS in the 2G Access Network and BSC are lumped together, be shown BSS.In subsequent descriptions process of the present invention, described 2G network of network side entity comprises: BSS and MSC.
In this step, described special calling request message is the notion with respect to the call request message under the ordinary meaning.Special calling request message of the present invention can be a new information that redefines, and also can be to carry some specific informations in the call request message under the ordinary meaning and the message that forms.
Preferably, the 2G module can be carried on the information that makes MSC determine that the ongoing communication in 3G network of described double-module double-standby terminal need switch to the 2G network in the call request message, thereby make this call request message be called a special calling request message, and this special calling request message is sent to MSC by BSS.
In call request message, carry and make MSC determine described double-module double-standby terminal when ongoing communication need switch to the information of 2G network in 3G network, can take following mode:
Under the ordinary meaning, need to carry calling number and called number in the call request message, described calling number and called number all are common numbers.
In special calling request message of the present invention, called number can be changed to the special number that sets in advance, calling number is changed to the 2G number of described double-module double-standby terminal.This special number is specifically designed to expression terminal is switched to the 2G network in the ongoing communication of 3G network, like this, when the called number in the call request message that MSC receives is this special number, just can learn that terminal need switch to the 2G network from 3G network with current ongoing communication, thereby carry out corresponding subsequent processing according to follow-up processing flow of the present invention.
The described special number of this step can be pre-configured among double-module double-standby terminal and the MSC.
In this step, (that is: can not discern special calling request of the present invention) when MSC does not support technical scheme of the present invention, double-module double-standby terminal can be pointed out the user: the 3G network poor signal; When current communication can't be proceeded in 3G network, can interrupt current communication, and make a call again by the 2G network.For example: above-mentioned when the called number in the call request message is changed to the technical scheme of special number when taking, if it is a special calling request that MSC can not discern this by described special number, to return the mistake of the unreachable or spacing of called number to double-module double-standby terminal, at this moment, double-mode and double-standby terminal can be by modes such as terminal display screen or prompt tones to user prompt 3G network poor signal.
Step 104:MSC is according to special called number in the call request message of receiving, judge this be one need with the caller double-module double-standby terminal current in 3G network ongoing communication switch to the call request of 2G network, therefore, determine to need directly to give this double-module double-standby terminal distribution 2G network of network resource, and do not need to carry out any processing called.
Step 105a～step 105b:2G network of network side entity is the calling terminal Resources allocation, just is that described double-module double-standby terminal distributes 2G network of network resource.
In this step, can be the double-module double-standby terminal Resources allocation according to the relevant criterion of existing 2G network, particularly:
At step 105a, MSC is that double-module double-standby terminal distributes land circuit, and sends assignment request message (Assignment Request) to BSS, and request BSS is that double-module double-standby terminal distributes interface-free resources;
At step 105b, BSS is that double-module double-standby terminal distributes interface-free resources, and notifies double-module double-standby terminal by channel assignment message (Channel Assignment Message) with the interface-free resources of being distributed.
The message that defines in employed A mouth message and air-interface information and the existing 2G network relevant criterion in the said process is consistent.
Step 106: after double-module double-standby terminal is received channel assignment message, switch to the 2G channel, set up synchronously with BSS according to the interface-free resources of being distributed.
Step 107:BSS sends assignment to MSC and finishes message (Assignment Complete).
Step 108:MSC is according to the 2G number of preserving and the binding relationship of 3G number, speech channel between described 3G number and the Correspondent Node user is switched to speech channel between described 2G number and the Correspondent Node user, that is: the speech channel with the 3G network side switches to the 2G network side.
In this step, the binding relationship of 2G number and 3G number is exactly: 2G number that uses in same double-module double-standby terminal and 3G number.At shared MSC with the application scenarios of MSC is set respectively, can distinguish the operation that realizes in the following manner in this step:
1, for the application scenarios of 2G network and the shared MSC of 3G network
At this moment, the attaching position register of 2G network and 3G network (HLR) can be kept at the binding relationship of 2G number and 3G number among the HLR, also with shared like this, MSC just can come the corresponding 3G number of caller 2G number in definite and the described special calling request message by searching HLR.After determining the 3G number, just can obtain the Correspondent Node user's who is communicating by letter with this 3G number land circuit information, finish the switching of described speech channel.
Certainly, the 2G number also is kept in the relevant database with the binding relationship of 3G number, or is kept at the memory device that is used for preserving described binding relationship of special setting.
2, the application scenarios of MSC is set respectively for 2G network and 3G network
The binding relationship of 2G number and 3G number can be kept in the equipment that the MSC of 2G network can get access to, for example: the HLR of 2G network, relevant database or the special memory device that is used to preserve described binding relationship that is provided with.The MSC of 2G network according to described binding relationship determine with described special calling request message in the corresponding 3G number of caller 2G number after, MSC with described 3G number notifying 3G network, obtain the Correspondent Node user's who is communicating by letter with this 3G number land circuit information by the MSC of 3G network, finish the switching of described speech channel.
As seen, still be provided with respectively, preferably, the binding relationship of 2G number and 3G number can be kept in the 2G network of network side related entities no matter the MSC of 2G network and 3G network is shared.
The mode of the binding relationship of above-mentioned realization 2G number and 3G number has following several:
1) notifies 2G network of network side entity by registration message with the binding relationship of 2G number and 3G number by double-module double-standby terminal, for example: notice MSC; And by the preservation of 2G network of network side relevant device, for example: be kept among the HLR, or in the relevant database, or a special memory device that is used for preserving described binding relationship that is provided with.
2) in above-mentioned relevant device, dispose in the mode of 2G network of network side by the operator by manual configuration.
Step 109a～step 109b:MSC notice 3G Access Network discharges the Internet resources of 3G network side for the 3G network of this double-module double-standby terminal distribution.Particularly:
In step 109a, MSC sends release command (Iu Release Command) to RNS;
In step 109b, RNS sends radio bearer release message (RBRelease) to double-module double-standby terminal.
So far, finish the different-system switching method of double-module double-standby terminal of the present invention.
As seen from the above-described embodiment, the 3G module of the different-system switching method of double-module double-standby terminal of the present invention in double-module double-standby terminal judged when the signal quality of 3G network is lower than the thresholding that sets in advance, take to notify the module of the 2G in this double-module double-standby terminal, and sent the mode of special calling request message by the 2G module to 2G network of network side entity; And 2G network of network side entity has been taked directly to distribute 2G network of network resource for this double-module double-standby terminal after receiving described special calling request message, and carries out the mode of corresponding subsequent hand-off process.
The technical scheme that the invention described above provided is compared with the changing method of the described existing dual-mode single-standby terminal of background technology, difference is: on the one hand, switch decision is to be made according to the signal quality situation of 3G network by the 3G module in the double-module double-standby terminal, need not terminal and carry out the RAT measurements, also need not terminal and report the report of RAT measurements, more do not need RNC to carry out switch decision to RNC; On the other hand, after decision is switched, be initiatively to initiate special call request message to network side by the 2G module in the double-module double-standby terminal, and directly be that this double-module double-standby terminal distributes 2G network of network resource according to the particularity of described call request message, and carry out the corresponding subsequent hand-off process by network side; Thereby make that technical scheme of the present invention does not need to eat dishes without rice or wine to make any change to existing, also simplified switching flow, reduced and switched the time that is spent.
The technical scheme that the invention described above provided is compared with the changing method of the described existing double-module double-standby terminal of background technology, can make the imperceptible call drop of user, thereby realizes the smooth migration of communication.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the different-system switching method of a double-module double-standby terminal is used for described double-module double-standby terminal is switched to second generation mobile communication 2G network in the ongoing communication of 3G (Third Generation) Moblie 3G network, it is characterized in that, comprising:
A, when the 3G module in the double-module double-standby terminal judges that the signal quality of 3G network is lower than the thresholding that sets in advance, notify the 2G in the described double-module double-standby terminal module;
B, described 2G module send the special calling request message according to the notice of described 3G module to 2G network of network side entity;
C, if described 2G network of network side entity is received described special calling request message, then be described double-module double-standby terminal distribution 2G network of network resource;
The network side entity of D, described double-module double-standby terminal, 2G network of network side entity and 3G network switches to the ongoing communication in 3G network of described double-module double-standby terminal in the described 2G network of network resource and to carry out.
2. method according to claim 1 is characterized in that, the described 2G module of step B sends the special calling request message to 2G network of network side entity and comprises:
The information that the 2G module will make described 2G network of network side entity determine that the ongoing communication in 3G network of described double-module double-standby terminal need switch to the 2G network is carried in the call request message, and described call request message is sent to described 2G network of network side entity.
3. method according to claim 2 is characterized in that, further comprises before described step C:
After described 2G network of network side entity is received call request message, determine that according to the described 2G network of network side entity that makes that carries in the described call request message described double-module double-standby terminal ongoing communication needs in 3G network switch to the information of 2G network, judge that the described call request message of receiving is the special calling request message.
4. method according to claim 1 is characterized in that, described 2G network of network side entity comprises: the base station sub-system BSS at moving exchanging center MSC and the current 2G cell of living in of described double-module double-standby terminal place;
The described 2G network of network of step C side entity is that described double-module double-standby terminal distributes 2G network of network resource to comprise:
C1, described MSC are that described double-module double-standby terminal distributes land circuit, and send assignment request message to described BSS;
C2, described BSS are that described double-module double-standby terminal distributes interface-free resources, and notify described double-module double-standby terminal by channel assignment message with the interface-free resources of described distribution.
5. method according to claim 4 is characterized in that, described 2G network of network side entity comprises: the BSS at MSC and the current 2G cell of living in of described double-module double-standby terminal place; The network side entity of described 3G network comprises: the RNS RNS at MSC and place, the current 3G of living in sub-district of described double-module double-standby terminal;
Described step D comprises:
D1, described double-module double-standby terminal switch to the 2G channel according to the interface-free resources of described distribution, set up synchronously with described BSS;
D2, described BSS send assignment to described MSC and finish message;
D3, MSC be according to the 2G number of preserving and the binding relationship of 3G number, and the speech channel between described 3G number and the Correspondent Node user is switched to speech channel between described 2G number and the Correspondent Node user;
D4, MSC notice RNS is released to the Internet resources of the 3G network of described double-module double-standby terminal distribution.
6. method according to claim 5 is characterized in that, the binding relationship of described 2G number and 3G number is notified 2G network of network side entity by described double-module double-standby terminal by registration message, and is preserved by 2G network of network side entity.
7. method according to claim 5 is characterized in that, the binding relationship of described 2G number and 3G number is set in advance and preserved by 2G network of network side entity.
8. method according to claim 2, it is characterized in that the information that described 2G module will make described 2G network of network side entity determine that the ongoing communication in 3G network of described double-module double-standby terminal need switch to the 2G network is carried in the call request message and is:
Described 2G module is changed to the special number that sets in advance with the called number in the described call request message, and calling number is changed to the 2G number of described double-module double-standby terminal.
9. method according to claim 8 is characterized in that, the described special number that sets in advance sets in advance in described double-module double-standby terminal and 2G network of network side entity.
10. according to each described method of claim 1 to 9, it is characterized in that, before described steps A, further comprise:
Described 3G module is periodically measured the signal quality of 3G network, and the signal quality and the described thresholding that sets in advance of the described 3G network that measures compared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2007101760558A CN101175330B (en) | 2007-10-18 | 2007-10-18 | Different system switching method for double-module double-standby terminal |
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| CN2007101760558A CN101175330B (en) | 2007-10-18 | 2007-10-18 | Different system switching method for double-module double-standby terminal |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101848511B (en) * | 2009-03-24 | 2013-01-02 | 华为技术有限公司 | Business switching method, business information control method, related apparatus and system |
| CN102098753B (en) * | 2009-12-11 | 2014-07-02 | 中国移动通信集团公司 | Method and terminal for selecting service bearing network |
| CN102264067B (en) * | 2010-05-26 | 2014-03-12 | 电信科学技术研究院 | Method and equipment for processing safety function in switching process |
| CN101909344B (en) * | 2010-08-16 | 2013-01-30 | 展讯通信（上海）有限公司 | Method for smoothing cell signal quality measured values by double-module terminal and double-module terminal thereof |
| CN101977409A (en) * | 2010-10-20 | 2011-02-16 | 中兴通讯股份有限公司 | Communication method and device for double-network double-standby terminal |
| CN101977410A (en) * | 2010-10-20 | 2011-02-16 | 中兴通讯股份有限公司 | Method and device for dual-network and dual-standby terminal to perform communication |
| CN101977411A (en) * | 2010-10-20 | 2011-02-16 | 中兴通讯股份有限公司 | Communication method and communication device of double-network double-standby terminal |
| CN101984729A (en) * | 2010-11-15 | 2011-03-09 | 中兴通讯股份有限公司 | Communication method and device of dual network dual standby terminal |
| CN103702358B (en) | 2012-09-27 | 2017-12-19 | 中兴通讯股份有限公司 | The measurement initiating method and user terminal of different frequency/different system cell gravity treatment |
| CN103906196B (en) * | 2014-04-15 | 2018-02-13 | 宇龙计算机通信科技(深圳)有限公司 | Network search method and web search device, terminal |
| CN105827786B (en) * | 2015-01-04 | 2019-07-05 | 中国移动通信集团公司 | The multimode mutual operation method and device of double-standby terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101014199A (en) * | 2007-03-02 | 2007-08-08 | 中兴通讯股份有限公司 | Method for canceling basic switch from TDCDMA to GSM of terminal |
| CN101262697A (en) * | 2007-03-05 | 2008-09-10 | 中兴通讯股份有限公司 | An inter-system switch control method for dual-mode user device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101014199A (en) * | 2007-03-02 | 2007-08-08 | 中兴通讯股份有限公司 | Method for canceling basic switch from TDCDMA to GSM of terminal |
| CN101262697A (en) * | 2007-03-05 | 2008-09-10 | 中兴通讯股份有限公司 | An inter-system switch control method for dual-mode user device |
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