CN101257708B - Method and system for realizing terminal basic switch from TDCDMA to GSM - Google Patents

Method and system for realizing terminal basic switch from TDCDMA to GSM Download PDF

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Publication number
CN101257708B
CN101257708B CN200710130417XA CN200710130417A CN101257708B CN 101257708 B CN101257708 B CN 101257708B CN 200710130417X A CN200710130417X A CN 200710130417XA CN 200710130417 A CN200710130417 A CN 200710130417A CN 101257708 B CN101257708 B CN 101257708B
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China
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gsm
calling
portable terminal
tdcdma
network
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CN101257708A (en
Inventor
刘竞翔
吕剑明
刘建业
刘卫东
王炜
吴近峰
庞秀峰
张慧
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ZTE Corp
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ZTE Corp
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Abstract

A method and a system for realizing basic handover of a terminal from TDCDMA to GSM are provided. The system includes a double-mode mobile terminal, a TDCDMA network and a GSM network, GSM network numbers of the terminal are stored in TDMSC; after the terminal establishes TDCDMA network call, RNC judges the terminal needs to switch to the GSM network, sends a call to the GSM network and identifies the call; after the call of the GSM network and the terminal is established, the terminal switches the internal channel from TDCDMA call to GSM call, the GSM network sends a call answering message to the TDMSC, the TDMSC succeeds to the GSM network call and an opposite terminal of the mobile terminal call. The invention can switch a double-mode terminal to the GSM network to continue current call under the condition of TDCDMA network signal attenuation.

Description

Realize the method and system of basic switching between terminal is from TDCDMA to GSM
Technical field
The present invention relates to the method and system that terminal in the communication field inserts, the method and system that switches between relating in particular to from TDCDMA to the gsm system.
Background technology
TDCDMA (TD-CDMA Time Division-Code Division Multiple Access access) is as the third generation mobile technology, and at the initial stage of networking, with ripe GSM network and deposit, the TDCDMA network coverage tends to show as the isolated island in the GSM network with a large amount of.Therefore, realize the switching of TDCDMA, to one of key factor of the service quality of raising system to gsm system.
According to the agreement regulation, dual-mode handset should have the different system cell signal quality of measurement and finish the ability of switching between system by reorientation standard agreement process between system.But, present quite a few TD CDMA that exists and the dual-mode and dual-idle mobile phone of GSM, these special dual-mode and dual-idle mobile phones can't accomplish to detect the signal quality of neighboring GSM cell when using the TD cdma system, can not finish between system by repositioning process between the system of agreement regulation to switch.And this type of mobile phone is incited somebody to action long-term existence afterwards as a kind of special dual-mode and dual-idle mobile phone.
Like this, this kind double-module double-standby terminal can't automatically switch to the GSM network and use the GSM resource to proceed conversation after moving to the zone that does not have the TDCDMA network coverage.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of TDCDMA of realization to the method and system that switches between gsm system, make and to finish the TDCDMA that switches between system and GSM double-module double-standby terminal under the situation of TDCDMA network signal decay by agreement, can switch to the current calling of GSM network continuation.
Basic design of the present invention is to utilize dual-mode and dual-idle mobile phone in the simultaneously resident characteristic of TD CDMA and GSM, by the way that makes a call toward the GSM network portion of mobile phone in switching, is implemented to the handoff functionality of GSM network.
The invention provides a kind of basic method of switching between terminal is from TDCDMA to GSM that realizes, may further comprise the steps:
(a) the GSM network No. sign indicating number with TDCDMA and GSM double-mode double-standby mobile terminal is saved in the time-division TDMSC of mobile switching centre;
(b) described portable terminal is after setting up the calling of TDCDMA net, and radio network controller (RNC) judges that this portable terminal need switch to the GSM network, then sends re-positioning request to described TDMSC, identifies this and switch to the switching of GSM network in message;
(c) described TDMSC uses the GSM number of described portable terminal to be called number, is initiated to the calling of GSM net, and identifies this calling for switching the calling of being initiated to the GSM net;
(d) after the success of the call setup of GSM network and described portable terminal, this portable terminal returns the calling connection message to the GSM net, and described terminal inner channel is switched in the GSM calling from the TDCDMA calling;
(e) GSM network transmission call answering message is to described TDMSC, and this TDMSC continues, and the GSM net is called out partly and the opposite end of described portable terminal original place calling, and the active call release is in the resource of TDCDMA network insertion part.
Further, said method also can have following characteristics:
In the step (a), when portable terminal inserted the TDCDMA net, attaching position register HLR sent to TDMSC and inserts subscriber data message, inserts user data to TDMSC, the GSM network number that wherein comprises this portable terminal, TDMSC are preserved the GSM network number of this portable terminal.
Further, said method also can have following characteristics:
In the step (b), described portable terminal is notified this terminal of radio network controller (RNC) to have and is responded the calling that the switching of GSM net is initiated in the process of setting up the calling of TDCDMA net, finishes the ability of switching from TDCDMA to GSM;
After described RNC judges that described portable terminal need switch to the GSM network, judge again whether this terminal has described switching capability, as have, send described re-positioning request again, otherwise do not send.
Further, said method also can have following characteristics:
In the step (c), be calling number by described calling to be set to operator be this type of special service number that switches regulation, identify this callings for netting the calling that switching is initiated to GSM.
Further, said method also can have following characteristics: the call establishment of described GSM network of step (d) and described portable terminal may further comprise the steps:
(d1) after the GSM network is received described calling, be initiated to the paging of described portable terminal, the GSM network portion of this portable terminal is returned page response;
(d2) the GSM network sends call setup message to described portable terminal, carries described calling number in the message;
(d3) after the described portable terminal calling number that identifies this calling is described special service number, insert this calling automatically.
Further, said method also can have following characteristics:
Described portable terminal is at the GSM net CLIP service of having contracted, and not signatory being transferred to civilian work in the early time be engaged in and forward-shifting service late, in the signatory caller number restriction business of TDCDMA net.
Realization terminal provided by the invention from TDCDMA to GSM between the basic system of switching comprise GSM and TDCDMA double-mode double-standby mobile terminal, TDCDMA network and GSM network, the GSM network is used to realize the access and the call treatment of portable terminal GSM part, the TDCDMA network comprises radio network controller (RNC), the time-division TDMSC of mobile switching centre and homing user position register HLR, described TDMSC links to each other with GSM network gateway exchange, described HLR links to each other with TDMSC and deposits the GSM number of portable terminal, is characterized in:
Described TDMSC is used for preserving its GSM network No. sign indicating number when described portable terminal inserts, in receiving re-positioning request that RNC sends and message sign this when switching to the switching of GSM network, GSM number with described portable terminal is the calling that called number is initiated to the GSM net, and identify this calling for switching the calling of being initiated to the GSM net, after the call answering message of receiving the GSM net, the GSM that continues net is called out the opposite end of part and the original place calling of described portable terminal, and the active call release is in the resource of TDCDMA network insertion part;
Described RNC is used to manage the wireless connections of TDCDMA network, judges that described portable terminal need switch to the GSM network, sends re-positioning request to described TDMSC, and in message sign this switch to the switching of GSM network;
Described portable terminal with the success of the call setup of GSM network after, switch the calling of being initiated if this is called out to being accomplished to the GSM net, then return the calling connection message, and described terminal inner channel called out from TDCDMA switch in the GSM calling to the GSM net.
Further, said system also can have following characteristics:
Described portable terminal is at the GSM net CLIP service of having contracted, and not signatory being transferred to civilian work in the early time be engaged in and forward-shifting service late, in the signatory caller number restriction business of TDCDMA net.
Further, said system also can have following characteristics:
Described TDMSC be the calling number by described calling to be set to operator be this type of special service number that switches regulation, identify this callings for netting the calling that switching is initiated to GSM.
Further, said system also can have following characteristics:
Described portable terminal also is used for setting up the process that the TDCDMA net is called out, and notifies this terminal of radio network controller (RNC) to have and responds the calling that the switching of GSM net is initiated, and finishes the ability of switching from TDCDMA to GSM;
Described RNC judges whether this terminal has described switching capability again, as has after judging that described portable terminal need switch to the GSM network, sends described re-positioning request again, otherwise do not send.
As can be seen, the TDCDMA that the present invention proposes is to the changing method of gsm system, make double-mode double-standby mobile terminal under the situation of TDCDMA network signal decay (as moving to the zone that does not have the TDCDMA network coverage), can switch to the GSM network, continue current calling, improve the service quality of network.Further, this method does not need TDCDMA and GSM network exchange wireless messages.Like this, what the GSM network was finished is normal call function, so do not need the GSM network to upgrade, is convenient to dispose and implement.In addition, this method uses specific calling number sign to switch, and portable terminal can be according to number switching channels automatically, and the user can not perceive the carrying out of switching.
Description of drawings
Fig. 1 is that the embodiment of the invention realizes the system construction drawing that TDCDMA switches to GSM.
Fig. 2 is that the embodiment of the invention realizes the system flow chart that TDCDMA switches substantially to GSM.
Fig. 3 is that the embodiment of the invention realizes the system flow chart of TDCDMA to the follow-up switching of GSM.
Fig. 4 is that the embodiment of the invention realizes the system flow chart of TDCDMA to the GSM basic handover cancelling.
Fig. 5 is that the embodiment of the invention realizes the system flow chart of TDCDMA to the follow-up handover cancelling of GSM.
Embodiment
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical scheme.
The system construction drawing that Fig. 1 switches to GSM for embodiment of the invention TDCDMA.Comprise portable terminal, TDCDMA network and GSM network.
GSM network 15 can be realized the access and the call treatment of portable terminal GSM part.
Comprise in the TDCDMA network:
Radio network controller (RNC) 12 is used to manage the wireless connections of TDCDMA network, and portable terminal TD part inserts under RNC;
TDMSC (time-division mobile switching centre) 13 links to each other with GSM network gateway exchange with RNC, HLR, is used for realizing calling out and switching control function; And
The homing user position register of TD network (HLR) links to each other with TD-MSC, deposits the user profile of mode mobile terminal TDCDMA network identity card and the GSM number of portable terminal.In the present embodiment, this HLR separates HLR, i.e. the HLR of TD net, but the present invention also can use and merge HLR, merges HLR and logically is equal to a TD HLR and a GSM HLR.
Portable terminal 11 is supported TDCDMA pattern and GSM pattern, can standby simultaneously under two kinds of patterns.Two tag cards are arranged in the terminal 11, and one is the user ID card of TDCDMA network, is used for the network service with TDCDMA; One is the user ID card of GSM network, is used for the network service with GSM.In addition, mobile phone users is engaged in and forward-shifting service late contracted CLIP service and not signatory being transferred to civilian work in the early time of GSM net, in the signatory caller number restriction business of TD net.
Fig. 2 is that present embodiment is realized the flow chart that TDCDMA switches substantially to GSM.Under the initial state of switching, portable terminal inserts under TDCDMA exchange TDMSC, and through switching, terminal inserts under GSM exchange.Concrete steps are as follows:
Step 301, portable terminal are when the TDCDMA network insertion, and HLR sends to TDMSC and inserts subscriber data message, inserts user data to TDMSC, wherein comprises the GSM network number of this portable terminal, and TDMSC preserves the GSM network number of this portable terminal;
Step 302, portable terminal are set up the TDCDMA net and are called out, and set up in the calling procedure, and this terminal of portable terminal notice RNC has the switching capability from TDCDMA to GSM described in the invention;
Above-mentioned switching capability is meant that portable terminal has response response and switches the calling of being initiated to the GSM net, realizes the ability of switching from TDCDMA to the GSM network.
Step 303, RNC analyzes the examining report of portable terminal at the TDCDMA network, if terminal all is lower than certain set point at the signal level of all sub-districts of TDCDMA, think that then terminal need switch to the GSM network, switching capability as described in having as this terminal, then send re-positioning request to TDMSC, in message, identify this and switch to the switching of GSM network;
Switching capability as described in not having as terminal, then RNC does not send re-positioning request to TDMSC.
Step 304, TDMSC uses this terminal GSM number of preserving to be called number, is initiated to the calling of GSM network, and wherein calling number is that operator is this type of special service number that switches regulation, such as 991234;
Step 305 after the GSM network is received described calling, is initiated to the paging of portable terminal, and the GSM network portion of portable terminal is returned page response;
Step 306, GSM network send call setup message to portable terminal, wherein carry above-mentioned calling number;
After the calling number that step 307, portable terminal identify this calling is described special service number, insert this calling automatically;
Step 308, portable terminal are returned and are called out connection message to the GSM network after the call setup success, and the channel of terminal inner is called out from TDCDMA, switch to GSM and call out up;
Before the switching, terminal is connected the TD voice-over-net signal of decoding with the terminal microphone.After the switching, terminal transfers the voice signal of playing the GSM network to.
Step 309, GSM network transmission call answering message are to TDMSC, and TDMSC continues, and the GSM net is called out partly and the opposite end of this portable terminal original place calling;
This step can utilize agreement specified standard flow process to finish.
Step 310, TDMSC initiatively is released in the resource of the access part of TDCDMA network.
For realizing above flow process, present embodiment system each several part need have following function:
Radio network controller (RNC) 12 is when judging that described portable terminal need switch to the GSM network, switching capability as described in having as this terminal, send re-positioning request to described TDMSC, and in message sign this switch to the switching (can realize) of GSM network by corresponding sign.
TDMSC (time-division mobile switching centre) 13 preserves its GSM network No. sign indicating number when portable terminal inserts, in receiving re-positioning request that RNC sends and message sign this when switching to the switching of GSM network, GSM number with described portable terminal is a called number, the calling number that is initiated to the calling of GSM net and calls out is set to operator and switches the special service number of regulation for this type of, after the call answering message of receiving the GSM net, the GSM that continues net is called out the opposite end of part and the original place calling of described portable terminal, and the active call release is in the resource of TDCDMA network insertion part.
Portable terminal 11 is notified this terminal of RNC to have and is responded the calling that the switching of GSM net is initiated in the process of setting up the calling of TDCDMA net, finishes the ability of switching from TDCDMA to GSM; Portable terminal with the success of the call setup of GSM network after, switch the calling of being initiated if this is called out to being accomplished to the GSM net, return to call out connection message and described terminal inner channel called out from TDCDMA to the GSM net and switch in the GSM calling.In the present embodiment, this mobile phone users is engaged in and forward-shifting service late contracted CLIP service and not signatory being transferred to civilian work in the early time of GSM net, in the signatory caller number restriction business of TD net.
The function of GSM network need not upgraded.
Fig. 3 is the flow chart of TDCDMA of the present invention to the follow-up switching of GSM.At this moment portable terminal switches to TDMSC B from TDMSC A, calls out and continues, and still along with the decay of TDMSC B network signal, the user begins the follow-up switching to the GSM network.Concrete steps are as follows:
Step 401, portable terminal are when the TDCDMA network insertion, and HLR sends to TDMSC A and inserts subscriber data message, inserts user data to TDMSC A, wherein comprises the GSM network number of this portable terminal, and TDMSC A preserves the GSM network number of this portable terminal;
Step 402, portable terminal is in the process of setting up the calling of TDCDMA net, this terminal of notice RNC has the switching capability from TDCDMA to GSM, after terminal switches to TDMSCB from TDMSC A, the report of the RNC analysing terminal under the TDMSC B, finding that this portable terminal drops at the signal level of TDCDMA network is lower than certain set point, think that this portable terminal need switch to the GSM network, switching capability as described in having as this terminal, then send re-positioning request to TDMSC B, wherein identify the switching that this switches to the GSM network;
After portable terminal switched to TDMSC B from TDMSC A, the access path of portable terminal and opposite end was: RNC---" TDMSC the B---" TDMSCA from portable terminal under---" TDMSC B---" opposite end.
Step 403, TDMSC B sends " preparing follow-up handoff request message " to TDMSC A, and timer is set, and waits for that TDMSC A replys;
Step 404, TDMSC A uses the GSM number of this portable terminal to be called number, is initiated to the calling of GSM network, and wherein calling number is that operator is this type of special service number that switches regulation, such as 991234;
Step 405 after the GSM network is received described calling, is initiated to the paging of this portable terminal, and the GSM network portion of this portable terminal is returned page response;
Step 406, GSM network send call setup message to portable terminal, wherein carry above-mentioned calling number;
After the calling number that step 407, portable terminal identify this calling is described special service number, insert this calling automatically;
Step 408, portable terminal are returned and are called out connection message and give the GSM network after call setup success, and the channel of terminal inner called out from TDCDMA switch to GSM and call out up;
Step 409, GSM network send call answering message to TDMSC A, the opposite end that the GSM that continues after TDMSC A receives net is called out partly and call out at the original place of this terminal;
After switching to GSM net, the access path between portable terminal and the opposite end becomes: portable terminal---" GSM net---" TDMSC A---" opposite end.
Step 410 and step 411, TDMSC A by E mouth (being the interface between the TDMSC) discharge former calling from TDMSCA to TDMSCB to the resource of RNC, comprise the Iu mouth that inserts part, TDMSCB side, E mouth self or the like.
Fig. 4 is the flow chart of TDCDMA to an example of GSM basic handover cancelling., in the GSM handoff procedure,, continue to reside in the TDCDMA network at portable terminal because the recovery of TDCDMA signal can be cancelled to the switching of GSM network.Concrete steps are as follows:
Step 501, portable terminal are when the TDCDMA network insertion, and HLR sends to TDMSC and inserts subscriber data message, inserts user data to TDMSC, wherein comprises the GSM network number of this portable terminal, and TDMSC preserves the GSM network number of this portable terminal;
Step 502, portable terminal are set up the TDCDMA net and are called out, and set up in the calling procedure, and this terminal of portable terminal notice RNC has the switching capability from TDCDMA to GSM described in the invention;
Step 503, RNC analyzes the examining report of portable terminal at the TDCDMA network, if terminal all is lower than certain set point at the signal level of all sub-districts of TDCDMA, think that then terminal need switch to the GSM network, switching capability as described in having as this terminal, then send re-positioning request to TDMSC, in message, identify this and switch to the switching of GSM network;
Step 504, TDMSC uses this terminal GSM number of preserving to be called number, is initiated to the calling of GSM network, and wherein calling number is that operator is this type of special service number that switches regulation, such as 991234;
Step 505, GSM network begin to handle calls out, and in the processing procedure, RNC finds that the signal of TDCDMA network recovers, so cancellation is switched, sends reorientation cancellation message to TDMSC;
The process that the GSM network processes is called out can be with reference to the flow process among Fig. 2.It is the final step of handoff procedure that portable terminal switches internal channel, and after portable terminal switched internal channel, TDMSCA just received the response message of GSM network at once, and discharges RNC.Internal channel has not been switched to the situation that the GSM net is cancelled switching again so portable terminal can not occur.
Step 506, TDMSC is discharged into the calling of GSM, returns handover cancelling to RNC and replys.Portable terminal continues to call out under the TDCDMA network.
Fig. 5 is the flow chart of TDCDMA to an example of the follow-up handover cancelling of GSM.The terminal that is moved is follow-up after the GSM switching, because the recovery of TDCDMA signal can be cancelled to the switching of GSM network, resides in the network under the TD MSC B.Concrete steps are as follows:
Step 601, portable terminal are when the TDCDMA network insertion, and HLR sends to TDMSC A and inserts subscriber data message, inserts user data to TDMSC A, wherein comprises the GSM network number of this portable terminal, and TDMSC A preserves the GSM network number of this portable terminal;
Step 602, portable terminal is in the process of setting up the calling of TDCDMA net, this terminal of notice RNC has the switching capability from TDCDMA to GSM, after terminal switches to TDMSCB from TDMSC A, the report of the RNC analysing terminal under the TDMSC B, finding that this portable terminal drops at the signal level of TDCDMA network is lower than certain set point, think that this portable terminal need switch to the GSM network, switching capability as described in having as this terminal, then send re-positioning request to TDMSC B, wherein identify the switching that this switches to the GSM network;
Step 603, TDMSC B sends " preparing follow-up handoff request message " to TDMSC A, and timer is set, and waits for that TDMSC A replys;
Step 604, TDMSC A uses the GSM number of this portable terminal to be called number, is initiated to the calling of GSM network, and wherein calling number is that operator is this type of special service number that switches regulation, such as 991234;
Step 605, GSM network begin to handle calls out, and in the processing procedure, finds that as the RNC under the TDMSC B signal of TDCDMA network recovers, so cancellation is switched, sends the cancellation re-positioning request to TDMSC B;
Step 606, TDMSC B sends " handling access signaling message " and gives TDMSC A, carries the reorientation cancel request message content after the packing;
Step 607, TDMSC A is discharged into the calling of GSM;
Step 608, TDMSC A sends " handling access signaling message " and gives TDMSC B, carries the reorientation cancellation response message content after the packing;
Step 609, TDMSC B sends the reorientation cancellation and replys RNC, and portable terminal continues to call out under the TDCDMA network.
The present invention has realized the handoff functionality of double-module double-standby terminal TDCDMA network to the GSM network under to the situation that existing gsm system is changed and influence is minimum.Make the portable terminal of double-module double-standby mode after roaming into outside the TDCDMA network, to continue to call out by the GSM network.

Claims (10)

1. realize the basic method of switching between terminal is from TDCDMA to GSM for one kind, may further comprise the steps:
(a) the GSM network No. sign indicating number with TDCDMA and GSM double-mode double-standby mobile terminal is saved in the time-division TDMSC of mobile switching centre;
(b) described portable terminal is after setting up the calling of TDCDMA net, and radio network controller (RNC) judges that this portable terminal need switch to the GSM network, then sends re-positioning request to described TDMSC, identifies this and switch to the switching of GSM network in message;
(c) described TDMSC uses the GSM number of described portable terminal to be called number, is initiated to the calling of GSM net, and identifies this calling for switching the calling of being initiated to the GSM net;
(d) after the success of the call setup of GSM network and described portable terminal, this portable terminal returns the calling connection message to the GSM net, and described terminal inner channel is switched in the GSM calling from the TDCDMA calling;
(e) GSM network transmission call answering message is to described TDMSC, and this TDMSC continues, and the GSM net is called out partly and the opposite end of described portable terminal original place calling, and the active call release is in the resource of TDCDMA network insertion part.
2. the method for claim 1 is characterized in that:
In the step (a), when portable terminal inserted the TDCDMA net, attaching position register HLR sent to TDMSC and inserts subscriber data message, inserts user data to TDMSC, the GSM network number that wherein comprises this portable terminal, TDMSC are preserved the GSM network number of this portable terminal.
3. the method for claim 1 is characterized in that:
In the step (b), described portable terminal is notified this terminal of radio network controller (RNC) to have and is responded the calling that the switching of GSM net is initiated in the process of setting up the calling of TDCDMA net, finishes the ability of switching from TDCDMA to GSM;
After described RNC judges that described portable terminal need switch to the GSM network, judge again whether this terminal has described switching capability, as have, send described re-positioning request again, otherwise do not send.
4. the method for claim 1 is characterized in that:
In the step (c), be calling number by described calling to be set to operator be this type of special service number that switches regulation, identify this callings for netting the calling that switching is initiated to GSM.
5. method as claimed in claim 4 is characterized in that: the call establishment of described GSM network of step (d) and described portable terminal may further comprise the steps:
(d1) after the GSM network is received described calling, be initiated to the paging of described portable terminal, the GSM network portion of this portable terminal is returned page response;
(d2) the GSM network sends call setup message to described portable terminal, carries described calling number in the message;
(d3) after the described portable terminal calling number that identifies this calling is described special service number, insert this calling automatically.
6. method as claimed in claim 4 is characterized in that:
Described portable terminal is at the GSM net CLIP service of having contracted, and not signatory being transferred to civilian work in the early time be engaged in and forward-shifting service late, in the signatory caller number restriction business of TDCDMA net.
7. realize the basic system of switching between terminal is from TDCDMA to GSM for one kind, comprise GSM and TDCDMA double-mode double-standby mobile terminal, TDCDMA network and GSM network, the GSM network is used to realize the access and the call treatment of portable terminal GSM part, the TDCDMA network comprises radio network controller (RNC), the time-division TDMSC of mobile switching centre and homing user position register HLR, described TDMSC links to each other with GSM network gateway exchange, described HLR links to each other with TDMSC and deposits the GSM number of portable terminal, it is characterized in that:
Described TDMSC is used for preserving its GSM network No. sign indicating number when described portable terminal inserts, in receiving re-positioning request that RNC sends and message sign this when switching to the switching of GSM network, GSM number with described portable terminal is the calling that called number is initiated to the GSM net, and identify this calling for switching the calling of being initiated to the GSM net, after the call answering message of receiving the GSM net, the GSM that continues net is called out the opposite end of part and the original place calling of described portable terminal, and the active call release is in the resource of TDCDMA network insertion part;
Described RNC is used to manage the wireless connections of TDCDMA network, judges that described portable terminal need switch to the GSM network, sends re-positioning request to described TDMSC, and in message sign this switch to the switching of GSM network;
Described portable terminal with the success of the call setup of GSM network after, switch the calling of being initiated if this is called out to being accomplished to the GSM net, then return the calling connection message, and described terminal inner channel called out from TDCDMA switch in the GSM calling to the GSM net.
8. system as claimed in claim 7 is characterized in that:
Described portable terminal is at the GSM net CLIP service of having contracted, and not signatory being transferred to civilian work in the early time be engaged in and forward-shifting service late, in the signatory caller number restriction business of TDCDMA net.
9. system as claimed in claim 7 is characterized in that:
Described TDMSC be the calling number by described calling to be set to operator be this type of special service number that switches regulation, identify this callings for netting the calling that switching is initiated to GSM.
10. system as claimed in claim 7 is characterized in that:
Described portable terminal also is used for setting up the process that the TDCDMA net is called out, and notifies this terminal of radio network controller (RNC) to have and responds the calling that the switching of GSM net is initiated, and finishes the ability of switching from TDCDMA to GSM;
Described RNC judges whether this terminal has described switching capability again, as has after judging that described portable terminal need switch to the GSM network, sends described re-positioning request again, otherwise do not send.
CN200710130417XA 2007-02-27 2007-07-18 Method and system for realizing terminal basic switch from TDCDMA to GSM Expired - Fee Related CN101257708B (en)

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