CN101170818A - Method and system for terminal to switch from TDCDMA to other networks - Google Patents

Method and system for terminal to switch from TDCDMA to other networks Download PDF

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Publication number
CN101170818A
CN101170818A CNA2007101302649A CN200710130264A CN101170818A CN 101170818 A CN101170818 A CN 101170818A CN A2007101302649 A CNA2007101302649 A CN A2007101302649A CN 200710130264 A CN200710130264 A CN 200710130264A CN 101170818 A CN101170818 A CN 101170818A
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network
calling
tdmsc
portable terminal
switching
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CNA2007101302649A
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CN101170818B (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 a terminal to switch from TDCDMA to other networks; the system contains a dual module and dual standby mobile terminal, a TDCDMA network and a network A. Firstly storing terminal numbers in the network A to the TDMSC; when the mobile terminal initiates TDCDMA network calls within the TDMSC A or shifts from TDMSC A to TDMSC B, RNC informs TDMSC A to prepare for subsequent switch if RNC determines to switch to the network A; by dialing network A numbers, TDMSC A initiates a call to the network A and marks by taking the A numbers as the called numbers; the terminal identifies the calling is initiated by switching to the network A and transfers the internal information channel from TDCDMA calls to network A calls; TDMSC A continues the calling of the network A and accesses the opposite end after receiving the answer from the network A. The invention enables the dual module and dual standby mobile terminal to continue the present calling by switching to another network when TDCDMA network signal diminishes.

Description

Terminal from TDCDMA to the method and system that switches other network
Technical field
The present invention relates to the method and system that terminal inserts in the communication field, relate in particular to from TDCDMA to the method and system that switches other network.
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.Except that GSM net, the TDCDMA network to other network such as CDMA, WCDMA between also have similar problem.
Summary of the invention
The technical problem to be solved in the present invention provides the method and system of a kind of terminal from TDCDMA to follow-up switching other network, make and to finish the double-module double-standby terminal that switches between system after finishing the TDCDMA net and switching by agreement, detect under the situation of TDCDMA network signal decay, can switch to other network once more and continue current calling.
Basic design of the present invention is to utilize dual-mode and dual-idle mobile phone in TDCDMA and the simultaneously resident characteristic of other network, by the way that makes a call toward another network portion of mobile phone in switching, is implemented to the handoff functionality of another network.
The invention provides the method for a kind of terminal, may further comprise the steps from TDCDMA to follow-up switching other network:
(a) the network A number with the double-mode double-standby mobile terminal of TDCDMA and network A is saved in the time-division TDMSC of mobile switching centre;
(b) described portable terminal carries out the calling of TDCDMA net, after switching to TDMSCB from TDMSC A, radio network controller (RNC) under the TDMSC B need switch to network A as judging this portable terminal, then send the described TDMSC B of message informing and need carry out follow-up switching, this TDMSC B sends message informing TDMSC A again and prepares follow-up switching, all identifies the switching that this switches to network A in the message;
(c) described TDMSC A uses the network A number of described portable terminal to be called number, is initiated to the calling of network A, and identifies this calling for switch the calling of being initiated to network A;
(d) described portable terminal is discerned this calling for switching the calling initiated to network A, and behind the call setup between network A, the internal channel of this terminal is called out from TDCDMA switch in the network A calling;
(e) network A sends call answering message to described TDMSC A behind call setup, and this TDMSC A continues, and described mobile terminal network A calls out partly and the opposite end of described portable terminal original place calling, and described portable terminal continues current calling in network A.
Further, said method also can have following characteristics:
Step (a) portable terminal is when the TDCDMA net inserts, attaching position register HLR sends to TDMSC and inserts subscriber data message, insert user data to TDMSC, wherein comprise the network A number of this portable terminal, TDMSC preserves the network A number of this portable terminal.
Further, said method also can have following characteristics:
In the step (b), described portable terminal is in the process of setting up the calling of TDCDMA net and in handoff procedure, and this terminal of RNC that notice is connected has the network A of responding and switches the calling of being initiated, and finishes the ability of switching from TDCDMA to the network A;
After RNC under the described TDMSC B judges that described portable terminal need switch to network A, judge again whether this terminal has described switching capability, as have, send re-positioning request notice TDMSCB again and need switch to network A, TDMSC B sends the follow-up handoff request message informing TDMSC A of preparation again and prepares to switch to network A.
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 the calling of this callings for being initiated to the network A switching;
In the step (d), described portable terminal is discerned this calling for switch the calling of being initiated to network A according to this calling number.
Further, said method also can have following characteristics: the call establishment of described network A of step (d) and described portable terminal may further comprise the steps:
(d1) after network A is received described calling, be initiated to the paging of described portable terminal, the network A of this portable terminal is partly returned page response;
(d2) network A 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;
(d4) described portable terminal returns and calls out connection message to network A.
Further, said method also can have following characteristics:
Described portable terminal is at the network A 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 TD net.
Further, said method also can have following characteristics:
In the step (e), TDMSC A is the useless resource of call release in the TDCDMA network also, comprises the connection of terminal and the TDMSC A connection and TDMSC B being connected to RNC to TDMSC B.
Further, said method also can have following characteristics:
Described network A is GSM network, cdma network or WCDMA network.
The system of realization terminal provided by the invention from TDCDMA to follow-up switching other network, comprise network A and TDCDMA double-mode double-standby mobile terminal, TDCDMA network and network A, network A is used to realize the access and the call treatment of mobile terminal network A 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 network A, HLR links to each other with TDMSC, is characterized in:
Described HLR deposits the network A number of portable terminal;
Described TDMSC is used for preserving its network A number when described portable terminal inserts, in receiving message that notice that RNC sends is switched and message sign this when switching to the switching of network A, the TDMSC that the TDMSC that switches to sends before message informing switches prepares follow-up switching, in receiving the message of preparing follow-up switching and message sign this when switching to the switching of network A, TDMSC before switching is the calling that called number is initiated to network A with the network A number of described portable terminal, and identify this calling for switch the calling of being initiated to network A, after receiving the call answering message of network A, TDMSC connection network A before switching calls out the opposite end of part and the original place calling of described portable terminal, and call release useless resource in the TDCDMA network;
Described RNC is used to manage the wireless connections of TDCDMA network, judges when described portable terminal need switch to network A, sends the request that notice is switched to the TDMSC that connected, and in message sign this switch to the switching of network A;
Described portable terminal is used for calling out to when network A is switched the calling of being initiated identifying, and the foundation between network A calls out, and the internal channel of this terminal is called out from TDCDMA to switch in the network A calling then.
Further, said system also can have following characteristics:
Described portable terminal is at the network A 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 TD 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 the calling of this callings for being initiated to the network A switching, described network A is GSM network, cdma network or WCDMA network.
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 this terminal of notice radio network controller (RNC) has the network A of responding and switches the calling of being initiated, and finishes the ability of switching from TDCDMA to the network A;
Described RNC judges whether this terminal has described switching capability again, as has after judging that described portable terminal need switch to network A, sends described re-positioning request again, otherwise do not send.
Another technical problem that the present invention will solve provides the method for a kind of terminal from TDCDMA to basic switching other network, make and to finish the double-module double-standby terminal that switches between system under the situation that detects the decay of TDCDMA network signal by agreement, can switch to other network once more and continue current calling.
In order to solve the problems of the technologies described above, the invention provides the method for a kind of terminal from TDCDMA to basic switching other network, may further comprise the steps:
(a) the network A number with the double-mode double-standby mobile terminal of TDCDMA and network A 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 network A, then sends message informing TDMSC and switches, and identifies this and switch to the switching of network A in message;
(c) described TDMSC uses the network A number of described portable terminal to be called number, is initiated to the calling of network A, and identifies this calling for switch the calling of being initiated to network A;
(d) described portable terminal is discerned this calling for switching the calling of being initiated to network A, returns the calling connection message to network A, and described terminal inner channel is switched in the network A calling from the TDCDMA calling;
(e) network A sends call answering message to described TDMSC behind call setup, and this TDMSC connection network A calls out the opposite end of part and the original place calling of described portable terminal, and portable terminal continues to call out in network A.
Further, said method also can have following characteristics:
Step (a) portable terminal is when the TDCDMA net inserts, attaching position register HLR sends to TDMSC and inserts subscriber data message, insert user data to TDMSC, wherein comprise the network A number of this portable terminal, TDMSC preserves the network A number of this portable terminal.
Further, said method also can have following characteristics:
In the step (b), described portable terminal is in the process of setting up the calling of TDCDMA net, and this terminal of notice radio network controller (RNC) has the network A of responding and switches the calling of being initiated, and finishes the ability of switching from TDCDMA to the network A;
After described RNC judges that described portable terminal need switch to network A, judge again whether this terminal has described switching capability, as have, send again and relocate request-message to TDMSC.
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 the calling of this callings for being initiated to the network A switching;
In the step (d), described portable terminal discerns whether switch the calling of being initiated to network A by described calling number.
Further, said method also can have following characteristics:
Described portable terminal is at the network A 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 TD net.
Further, said method also can have following characteristics:
Described network A is GSM network, cdma network or WCDMA network.
As can be seen, the TDCDMA that the present invention proposes is to the method for switching between other network, make double-mode double-standby mobile terminal after the TDCDMA net inserts the back or finishes the switching of TDCDMA net, under the situation that detects the decay of TDCDMA network signal (as moving to the zone that does not have the TDCDMA network coverage), can switch to other network such as GSM network and continue current calling, improve the service quality of network.Further, this method does not need TDCDMA and other network exchange wireless messages.What other network was finished is normal call function, so do not need network is upgraded, is convenient to dispose and implement.In addition, this method can use 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
Figure 1A and Figure 1B are respectively that the embodiment of the invention realizes that TDCDMA switches system construction drawing with follow-up switching substantially 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 example with the GSM net below, the enforcement to technical scheme is described in further detail in conjunction with the accompanying drawings.
The system construction drawing that Figure 1A switches to GSM substantially for embodiment of the invention TDCDMA.Comprise portable terminal, TDCDMA network and GSM network.
The GSM network can be realized the access and the call treatment of portable terminal GSM part.
Comprise in the TDCDMA network:
Radio network controller (RNC) is used to manage the wireless connections of TDCDMA network, and portable terminal TD part inserts under RNC;
TDMSC (time-division mobile switching centre) 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 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.
Figure 1B is the system construction drawing of embodiment of the invention TDCDMA to the follow-up switching of GSM.There is shown two continuous TDMSC, the TDMSC B that TDMSC A that terminal is inserted before promptly switching and switching back terminal are inserted.
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, judge again whether this terminal has described switching capability, if any then sending re-positioning request, in message, identify this and switch to the switching of GSM network to TDMSC;
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, 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 are behind call setup, and transmission call answering message is 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 discharges terminal at the resource of TDCDMA network insertion part and the TDMSC interface to RNC.
For realizing above flow process, system's 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 that call out at part and the original place of described portable terminal, and initiatively call release the TDCDMA network insertion partly and TDMSC to the resource of RNC.
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, and through switching, terminal inserts under GSM exchange.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 and in handoff procedure, this terminal of RNC that notice is connected has the switching capability from TDCDMA to GSM, after terminal switches to TDMSC B 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, judge again whether this terminal has described switching capability, if any then sending re-positioning request, wherein identify the switching that this switches to the GSM network to TDMSC B;
Above-mentioned switching capability is meant that portable terminal has the calling that the switching of GSM net is initiated, the ability that realization is switched from TDCDMA to the GSM network of responding.Switching capability as described in not having as terminal, then RNC does not send re-positioning request to TDMSC.
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, also identifies the switching that this switches to the GSM network in message;
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, and the channel of terminal inner 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 409, GSM network send call answering message to TDMSCA after the call setup success, 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;
This step can utilize agreement specified standard flow process to finish.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 discharges the useless resource of former calling in TDCDMA by E mouth (being the interface between the TDMSC), comprises the connection of terminal and the TDMSC A connection and TDMSC B being connected to RNC to TDMSC B.
For realizing above flow process, system's each several part need increase following function:
Need deposit the GSM number of portable terminal among the HLR;
Radio network controller (RNC) 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 corresponding TDMSC, and in message sign this switch to the switching (can realize) of GSM network by corresponding sign.
TDMSC is used for preserving its network A number when portable terminal inserts, in receiving message that notice that RNC sends is switched and message sign this when switching to the switching of network A, the TDMSC that the TDMSC that switches to sends before message informing switches prepares follow-up switching, in receiving the message of preparing follow-up switching and message sign this when switching to the switching of network A, TDMSC before switching is the calling that called number is initiated to network A with the network A number of portable terminal, and identify this calling for switch the calling of being initiated to network A, after receiving the call answering message of network A, TDMSC connection network A before switching calls out the opposite end of part and portable terminal original place calling, and call release is in the resource of TDCDMA network insertion part;
Portable terminal 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; And call out to when network A is switched the calling of being initiated identifying, and the foundation between network A calls out, the internal channel of this terminal is called out from TDCDMA switch in the network A calling then.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.
Therefore as can be seen, the function of GSM network need not upgraded.
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, judge again whether this terminal has described switching capability, if any then sending re-positioning request, in message, identify this and switch to the switching of GSM network to TDMSC;
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, continues to reside in the network under the TDMSC 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 and in handoff procedure, this terminal of RNC that notice is connected has the switching capability from TDCDMA to GSM, after terminal switches to TDMSC B 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;
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, TDMSC A 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 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.When making the portable terminal of double-module double-standby mode outside handoff procedure roams into the TDCDMA network, also can continue to call out by the GSM network.Simultaneously also can cancel switching.
It should be noted that in addition that in other embodiments the said GSM network can be the mobile communication network of other types also, such as CDMA, WCDMA network etc.Can know that from principle of the present invention handling process in these embodiments is consistent with the foregoing description.

Claims (16)

1. the method for a terminal from TDCDMA to follow-up switching other network may further comprise the steps:
(a) the network A number with the double-mode double-standby mobile terminal of TDCDMA and network A is saved in the time-division TDMSC of mobile switching centre;
(b) described portable terminal carries out the calling of TDCDMA net, after switching to TDMSCB from TDMSC A, radio network controller (RNC) under the TDMSC B need switch to network A as judging this portable terminal, then send the described TDMSC B of message informing and need carry out follow-up switching, this TDMSC B sends message informing TDMSC A again and prepares follow-up switching, all identifies the switching that this switches to network A in the message;
(c) described TDMSC A uses the network A number of described portable terminal to be called number, is initiated to the calling of network A, and identifies this calling for switch the calling of being initiated to network A;
(d) described portable terminal is discerned this calling for switching the calling initiated to network A, and behind the call setup between network A, the internal channel of this terminal is called out from TDCDMA switch in the network A calling;
(e) network A sends call answering message to described TDMSC A behind call setup, and this TDMSC A continues, and described mobile terminal network A calls out partly and the opposite end of described portable terminal original place calling, and described portable terminal continues current calling in network A.
2. the method for claim 1 is characterized in that:
Step (a) portable terminal is when the TDCDMA net inserts, attaching position register HLR sends to TDMSC and inserts subscriber data message, insert user data to TDMSC, wherein comprise the network A number of this portable terminal, TDMSC preserves the network A number of this portable terminal.
3. the method for claim 1 is characterized in that:
In the step (b), described portable terminal is in the process of setting up the calling of TDCDMA net and in handoff procedure, and this terminal of RNC that notice is connected has the network A of responding and switches the calling of being initiated, and finishes the ability of switching from TDCDMA to the network A;
After RNC under the described TDMSC B judges that described portable terminal need switch to network A, judge again whether this terminal has described switching capability, as have, send re-positioning request notice TDMSCB again and need switch to network A, TDMSC B sends the follow-up handoff request message informing TDMSC A of preparation again and prepares to switch to network A.
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 the calling of this callings for being initiated to the network A switching;
In the step (d), described portable terminal is discerned this calling for switch the calling of being initiated to network A according to this calling number.
5. the method for claim 1 is characterized in that: described portable terminal is at the network A 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 TD net.
6. the method for claim 1 is characterized in that:
In the step (e), TDMSC A is the useless resource of call release in the TDCDMA network also, comprises the connection of terminal and the TDMSC A connection and TDMSC B being connected to RNC to TDMSC B.
7. the method for claim 1, it is characterized in that: described network A is GSM network, cdma network or WCDMA network.
8. realize the system of terminal for one kind from TDCDMA to follow-up switching other network, comprise network A and TDCDMA double-mode double-standby mobile terminal, TDCDMA network and network A, network A is used to realize the access and the call treatment of mobile terminal network A 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 network A, HLR links to each other with TDMSC, it is characterized in that:
Described HLR deposits the network A number of portable terminal;
Described TDMSC is used for preserving its network A number when described portable terminal inserts, in receiving message that notice that RNC sends is switched and message sign this when switching to the switching of network A, the TDMSC that the TDMSC that switches to sends before message informing switches prepares follow-up switching, in receiving the message of preparing follow-up switching and message sign this when switching to the switching of network A, TDMSC before switching is the calling that called number is initiated to network A with the network A number of described portable terminal, and identify this calling for switch the calling of being initiated to network A, after receiving the call answering message of network A, TDMSC connection network A before switching calls out the opposite end of part and the original place calling of described portable terminal, and call release useless resource in the TDCDMA network;
Described RNC is used to manage the wireless connections of TDCDMA network, judges when described portable terminal need switch to network A, sends the request that notice is switched to the TDMSC that connected, and in message sign this switch to the switching of network A;
Described portable terminal is used for calling out to when network A is switched the calling of being initiated identifying, and the foundation between network A calls out, and the internal channel of this terminal is called out from TDCDMA to switch in the network A calling then; And this portable terminal is at the network A 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 TD net.
9. system as claimed in claim 8 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 the calling of this callings for being initiated to the network A switching, described network A is GSM network, cdma network or WCDMA network.
10. system as claimed in claim 8 is characterized in that:
Described portable terminal also is used for setting up the process that the TDCDMA net is called out, and this terminal of notice radio network controller (RNC) has the network A of responding and switches the calling of being initiated, and finishes the ability of switching from TDCDMA to the network A;
Described RNC judges whether this terminal has described switching capability again, as has after judging that described portable terminal need switch to network A, sends described re-positioning request again, otherwise do not send.
11. the method for a terminal from TDCDMA to basic switching other network may further comprise the steps:
(a) the network A number with the double-mode double-standby mobile terminal of TDCDMA and network A 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 network A, then sends message informing TDMSC and switches, and identifies this and switch to the switching of network A in message;
(c) described TDMSC uses the network A number of described portable terminal to be called number, is initiated to the calling of network A, and identifies this calling for switch the calling of being initiated to network A;
(d) described portable terminal is discerned this calling for switching the calling of being initiated to network A, returns the calling connection message to network A, and described terminal inner channel is switched in the network A calling from the TDCDMA calling;
(e) network A sends call answering message to described TDMSC behind call setup, and this TDMSC connection network A calls out the opposite end of part and the original place calling of described portable terminal, and portable terminal continues to call out in network A.
12. method as claimed in claim 11 is characterized in that:
Step (a) portable terminal is when the TDCDMA net inserts, attaching position register HLR sends to TDMSC and inserts subscriber data message, insert user data to TDMSC, wherein comprise the network A number of this portable terminal, TDMSC preserves the network A number of this portable terminal.
13. method as claimed in claim 11 is characterized in that:
In the step (b), described portable terminal is in the process of setting up the calling of TDCDMA net, and this terminal of notice radio network controller (RNC) has the network A of responding and switches the calling of being initiated, and finishes the ability of switching from TDCDMA to the network A;
After described RNC judges that described portable terminal need switch to network A, judge again whether this terminal has described switching capability, as have, send again and relocate request-message to TDMSC.
14. method as claimed in claim 11 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 the calling of this callings for being initiated to the network A switching;
In the step (d), described portable terminal discerns whether switch the calling of being initiated to network A by described calling number.
15. method as claimed in claim 11 is characterized in that:
Described portable terminal is at the network A 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 TD net.
16. method as claimed in claim 11 is characterized in that: described network A is GSM network, cdma network or WCDMA network.
CN2007101302649A 2007-03-12 2007-07-17 Method and system for terminal to switch from TDCDMA to other networks Expired - Fee Related CN101170818B (en)

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CN102026366A (en) * 2010-12-16 2011-04-20 华为技术有限公司 Single-card dual-standby network registering method and network control equipment
CN112601224A (en) * 2020-12-03 2021-04-02 海能达通信股份有限公司 Call switching method, device and system

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CN1505413A (en) * 2002-12-03 2004-06-16 北京三星通信技术研究有限公司 Method of switching between CDMA system and GSM system for dual mode mobile station
CN100359986C (en) * 2004-08-04 2008-01-02 中兴通讯股份有限公司 Switch adjudgement method in TD-SCDMA system

Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN102026366A (en) * 2010-12-16 2011-04-20 华为技术有限公司 Single-card dual-standby network registering method and network control equipment
CN102026366B (en) * 2010-12-16 2014-02-26 华为技术有限公司 Single-card dual-standby network registering method and network control equipment
CN112601224A (en) * 2020-12-03 2021-04-02 海能达通信股份有限公司 Call switching method, device and system
CN112601224B (en) * 2020-12-03 2023-02-10 海能达通信股份有限公司 Call switching method, device and system

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