CN102612103A - Method and system for terminal to implement PS (Packet Switching) from Evolved Universal Terrestrial Radio Access Network (EUTRAN) to Universal Terrestrial Radio Access Network (UTRAN) - Google Patents
Method and system for terminal to implement PS (Packet Switching) from Evolved Universal Terrestrial Radio Access Network (EUTRAN) to Universal Terrestrial Radio Access Network (UTRAN) Download PDFInfo
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- 230000000977 initiatory effect Effects 0.000 claims abstract description 12
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
- H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
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Abstract
The invention discloses a method and a system for a terminal to implement PS (Packet Switching) from an Evolved Universal Terrestrial Radio Access Network (EUTRAN) to a Universal Terrestrial Radio Access Network (UTRAN). By the method provided by the invention, the network side sends the location area information about a destination cell to the terminal through a Packet Switching (PS) command, or initiates location update as early as possible by means of compatibility processing of the network side when the location area changes. On one hand, the terminal can be prevented from being refused by the system due to differences in the location areas when initiating a service; on the other hand, the completion of the Circuit Switched Fallback(CSFB) process is accelerated, and the system performance is improved.
Description
Technical field
The present invention relates to CS domain dropping (CSFB) service technique, relate in particular to a kind of terminal and realize the method and system of EUTRAN to the PS switching of UTRAN.
Background technology
Through circuit switching (CS) domain dropping (CSFB) business, speech business can be used by other network in the terminal on the UTRAN of evolution (EUTRAN) network.The CSFB business roughly comprises: at first, the terminal includes CS and falls indication after rise through the transmission request of activating business in the request of activating business, will carry out the CSFB process with indication; At this moment; If end is in activated state; Mobile management entity (MME) can send terminal (UE) contextual modifications request message by the evolution base station (eNodeB) in EUTRAN; And in this UE contextual modifications request message, carrying CS falling indication, EUTRAN moves to UMTS grounding wireless access network (UTRAN) system with the terminal with indication; Then, EUTRAN sends UE contextual modifications response message as replying.If end is at Idle state, MME sends the initial context that carries CS falling indication to EUTRAN and sets up request message, and EUTRAN moves to the UTRAN system with the terminal with indication, and EUTRAN sends initial context and sets up response message as replying.
The optional execution of EUTRAN requires the terminal to send the step of UTRAN measurement report, and this step is in order to confirm that will carry out the professional target of CSFB is the UTRAN sub-district.If network support EUTRAN switches to the packet switching (PS) of UTRAN, then the optional execution of EUTRAN requires the terminal to send the situation of the step of measurement report with definite target UTRAN sub-district.
EUTRAN sends to the terminal and shifts out order from EUTRAN, and this is a CSFB process wherein to carry the field indication, and the terminal is received to shift out and begun to carry out handoff procedure after the order:
At first, the terminal that is in connected state converts Idle state into, and obtains the Location Area Identification (LAI) of Target cell through read system information; Then, whether the LAI of terminal judges Target cell changes, if change, the terminal can be initiated the position at once and upgraded or co-location district/route district (LA/RA) renewal process, and this position renewal needs the process with acceleration CSFB of sending as far as possible early.Therefore, if the objective network operator scheme is I, the terminal possibly sent out its separate location earlier and upgrade, then, and the routing update process of redispatching in the flow; Secondly, business request information initiation caller process is sent to the mobile switching centre (MSC) of target standard in the terminal; Optional, if also not initiating the position in the target standard, the terminal upgrades (LAU), perhaps new LAI does not allow; So; Network can return service denial message, and at this moment, the terminal thinks that LAU does not upgrade; Can initiate position updating process to upgrade its LAI, calling control flow is carried out at the terminal more then at once.
Can find out from top flow process, be cut into the target standard after, the judgement of lane place is a committed step; Though this step is optional,, if just not judging, the terminal do not carry out business hastily; Under the situation of lane place change, under the situation that especially MSC also changes; Can suffer the refusal of network side, initiate more new technological process of position then once more, prolong the time of CSFB process undoubtedly;
And; In the PS from EUTRAN to UTRAN switches; Network side does not carry the location area information of new sub-district and gives the terminal, therefore, the terminal to carry out the judgement of lane place must be earlier will be in new sub-district read system information; Or obtain location area information, this process has equally also prolonged the time of CSFB process.
On the other hand; If because in the existing procedure, network side is not informed the location area information of end objectives sub-district, and the terminal is in order to ensure flow process; No matter can be all the time initiate to upgrade and whether the lane place changes in the very first time, this is actual under the constant situation in lane place to be a kind of waste.If not initiating the position in the very first time, the terminal upgrades; But think that the lane place does not change with regard to the direct CS of initiation operation flow, network side can be refused the terminal and insert because of lane place difference or MSC difference, at this moment; When more new technological process of position is initiated at the terminal again; For the CSFB process, increased the flow process of service request and refusal undoubtedly, prolonged the time of CSFB process.
Summary of the invention
In view of this; Main purpose of the present invention is to provide a kind of terminal to realize the method and system of EUTRAN to the PS switching of UTRAN; Can avoid the terminal to initiate the professional system that suffers owing to the lane place is different and refuse, quicken the completion of CSFB process, improve systematic function.
For achieving the above object, technical scheme of the present invention is achieved in that
The method of EUTRAN to the PS switching of UTRAN realized at a kind of terminal, comprising: network side sends to the terminal through packet switching PS switching command with the location area information of Target cell;
The terminal judges according to the positional information that obtains whether the Location Area Identification LAI of Target cell changes, and when changing, initiates the position and upgrade, and initiates the circuit switching (CS) service request again.
The location area information of said Target cell adopts the mode of carrying 3G system information container; Perhaps, be carried in the Non-Access Stratum NAS information.
Said network side also comprises before through packet switching PS switching command the location area information of Target cell being sent to the terminal: said terminal need make a call, and the beep-page message of network side is received at perhaps said terminal.
Said network side sends to the terminal through packet switching PS switching command with the location area information of Target cell and comprises:
Said E-UTRAN network side sends to the terminal and shifts out order from EUTRA; In shifting out order, carrying field is CS domain dropping CSFB process with indication; Said terminal receives that shifting out order begins to carry out handoff procedure, in the switching command of said E-UTRAN network side, carries the NAS information or the 3G system information of Target cell;
Said terminal is according to NAS information in the switching command or 3G system information, parses wherein location area information to obtain the LAI of Target cell.
Said when judging the lane place and changing, initiate the position and upgrade and comprise:
Said terminal is initiated the position and is upgraded perhaps co-location district/route district LA/RA renewal; Perhaps,
Said terminal is initiated separate location and is upgraded, and in flow, carries out routing update again.
The method of EUTRAN to the PS switching of UTRAN realized at a kind of terminal, comprising:
The terminal receives the PS switching command in the CSFB process, send out the CS service request to network side, carries in the said CS service request that to be used to indicate this CS business be the CSFB indication of initiating because of the CSFB process;
Network side is according to the location area information at the said terminal flow process that makes a call.
Said network side comprises according to the location area information at the said terminal flow process that makes a call:
If said lane place does not change, proceed call flow;
Moving exchanging center MSC does not change if said lane place changes, and said network side preservation present position-region information continues to call out;
If said lane place changes and MSC changes, said network side is set up user data to terminal initiation request ID process, simultaneously, is initiated and completing place new technological process more by said network side self, proceeds afterwards to call out.
Said terminal is sent out the CS service request to network side and comprised: CS business request information or page-response message are sent to the MSC of target standard in said terminal, and in this message, carry the CSFB indication, are the CSFB process with informing network side active procedure.
The system of EUTRAN to the PS switching of UTRAN realized at a kind of terminal, comprises network side at least, the terminal, wherein,
Network side is used for through the PS switching command location area information of Target cell being sent to the terminal;
The terminal is used for the terminal according to the positional information that obtains, and judges whether the LAI of Target cell changes, and when changing, initiates the position and upgrade, and initiates the CS service request again.
The system of EUTRAN to the PS switching of UTRAN realized at a kind of terminal, comprises network side at least, the terminal, wherein,
Network side is used for sending the PS switching command to the terminal; Receive the CS service request, confirm the realization of calling procedure according to the location area information at terminal;
The terminal is used to receive the PS switching command, initiates the CS service request to network side, and informs network side, and this CS business is initiated because of the CSFB process.
Can find out from the technical scheme that the invention described above provides; Pass through the inventive method; Network side has sent to the terminal with the location area information of Target cell in the PS switching command; The perhaps compatible processing through network side under the situation about changing in the lane place, has been initiated the position renewal as early as possible.On the one hand, having avoided the terminal to initiate the professional system that suffers owing to the lane place is different refuses; On the other hand, quicken the completion of CSFB process, improved systematic function.
Description of drawings
Fig. 1 realizes the flow chart of EUTRAN to the method for the PS switching of UTRAN for terminal of the present invention;
Fig. 2 realizes the schematic flow sheet of EUTRAN to first embodiment of the PS switching of UTRAN for terminal of the present invention;
Fig. 3 realizes the schematic flow sheet of EUTRAN to second embodiment of the PS switching of UTRAN for terminal of the present invention.
Embodiment
Fig. 1 realizes the flow chart of EUTRAN to the method for the PS switching of UTRAN for terminal of the present invention, and is as shown in Figure 1, may further comprise the steps:
Step 100: network side sends to the terminal through the PS switching command with the location area information of Target cell.
In this step, the location area information of Target cell can adopt the mode of carrying 3G system information container, also can directly carry Non-Access Stratum (NAS) information, from 3G system information or NAS information, all can obtain the LAI information of the needed Target cell in terminal.Here, the mode of carrying 3G system information container is meant alter mode, and being meant increases a 3G system information container in PS HO.The concrete realization of this mode belongs to technology as well known to those skilled in the art, repeats no more here.
Step 101: the terminal judges according to the positional information that obtains whether the LAI of Target cell changes, and when changing, initiates the position and upgrade, and initiates the CS service request again.
Through method shown in Figure 1, because network side sent to the terminal with the location area information of Target cell in the PS switching command, like this, under the situation about changing in the lane place, the position renewal has been initiated at the terminal as early as possible.On the one hand, having avoided the terminal to initiate the professional system that suffers owing to the lane place is different refuses; On the other hand, quicken the completion of CSFB process, improved systematic function.
Because the expectation of the terminal of CSFB process is set up as early as possible and called out, and shortens time delay as far as possible, the present invention also can realize determining whether that needing to initiate the position upgrades, and specifically comprises at network side:
The terminal receives the PS switching command in the CSFB process, whether the detection position district does not change, but directly sends out CS service request (CS service request), and informs network side, and this CS business is initiated because of the CSFB process; At this moment, network side may be initiated following flow process according to the lane place at this terminal: if the lane place does not change, proceed call flow, have no influence to network side this moment; MSC does not change if the lane place has taken place to change, and the network side preservation present position-region information continues to call out, and in calling procedure, may follow the heavy assigning process of temporary mobile subscriber identity (TMSI); If change has also taken place MSC, network side is set up user data to terminal initiation request ID process, simultaneously, is initiated and completing place new technological process more by network side self, can proceed afterwards to call out.Need to prove that for realize determining whether that needing to initiate the position upgrade this implementation at network side, its concrete implementation has multiple, all upgrade, to support the go forward side by side processing of line position registration of active inquiry such as network side; Adopt the Version Control mode for another example, do not support for lowest version, and the highest version support; And for example revise layer three message content; When need support this function by the terminal report; At this moment; Need in CS service request or page response (Paging response) message when called, increase a field that is used for the CSFB indication, so that the process that network side will be of the present invention be realized determining whether needing initiating upgrading this implementation in the position at network side is distinguished with operation flow normally.More than the realization of concrete implementation be that those skilled in the art are known easily, repeat no more here.
Also provide relevant terminal to realize the system of EUTRAN to the inventive method, comprise network side at least to the PS switching of UTRAN, the terminal, wherein,
Network side is used for through the PS switching command location area information of Target cell being sent to the terminal;
The terminal is used for the terminal according to the positional information that obtains, and judges whether the LAI of Target cell changes, and when changing, initiates the position and upgrade, and initiates the CS service request again.
Perhaps,
Network side is used for sending the PS switching command to the terminal; Receive the CS service request, confirm the realization of calling procedure according to the location area information at terminal;
The terminal is used to receive the PS switching command, initiates the CS service request to network side, and informs network side, and this CS business is initiated because of the CSFB process.
Below in conjunction with embodiment two kinds of methods provided by the invention are described in detail.
Fig. 2 realizes the schematic flow sheet of EUTRAN to first embodiment of the PS switching of UTRAN for terminal of the present invention; As shown in Figure 2; Among first embodiment, suppose that the terminal confirms the execution of flow according to the positional information of the Target cell in the PS switching command that receives.
Step 200～step 202: the terminal need make a call or the beep-page message of network side is received at the terminal: at the terminal of long-term evolving network, speech business can realize by other network.When business need be carried out in the terminal, can notify network side through the request of activating business, if network side also supports CSFB professional, the request of activating business of network side response terminal; If end is in activated state, the eNodeB of MME in E-UTRAN sends and carries the UE contextual modifications request message that CS falls indication after rise, and indication E-UTRAN moves to the UTRAN system with the terminal; E-UTRAN sends UE contextual modifications request response as replying; If end is at Idle state, MME sends the initial context that carries CS falling indication to E-UTRAN and sets up request message, and E-UTRAN moves to the UTRAN system with the terminal with indication, and E-UTRAN transmission initial context is set up and asked response as replying.
In order to obtain the more information of Target cell, if network support E-UTRAN switches to the PS of UTRAN, then E-UTRAN can select to carry out require the terminal to send measurement report step to confirm the situation of target UTRAN sub-district.
Step 203: the network side command terminal begins to carry out and switches: E-UTRAN sends to the terminal and shifts out order from EUTRA; In shifting out order, carrying field is a CSFB process with indication; The terminal receives that shifting out order begins to carry out handoff procedure, in the switching command of network side, carries the NAS information or the 3G system information of Target cell.
Step 204～step 207: the terminal is according to NAS information in the switching command or 3G system information; The location area information that parses wherein (specifically realizes belonging to those skilled in the art's conventional techniques means with the LAI that obtains Target cell; Here repeat no more); Whether the LAI that judges Target cell changes, if change, the terminal is initiated the position renewal immediately or united LA/RA and upgrade; The terminal also can be initiated separate location earlier and upgraded, and in flow, carries out routing update again.
Step 208:CS service request: the CS business request information is sent to the MSC of target standard in the terminal, with the process of making a call.If location area updating (LAU) is not also initiated in the target standard in the terminal, perhaps new lane place (LAI) do not allow, so; Network side returns service denial message; At this moment, the terminal thinks that LAU does not upgrade, and can initiate the position at once and upgrade to upgrade its LAI; Calling control flow is carried out at the terminal then, accomplishes the PS switching flow.
Fig. 3 realizes the schematic flow sheet of EUTRAN to second embodiment of the PS switching of UTRAN for terminal of the present invention, and is as shown in Figure 3, in a second embodiment; Suppose that the terminal is in the CSFB process; When receiving the PS switching command, whether the detection position district does not change, but directly sends out the CS service request; And inform network side, this CS business is initiated because of the CSFB process; At this moment, network side is carried out call flow according to the lane place at this terminal, specifically comprises:
Step 300～step 302: the terminal need make a call or the beep-page message of network side is received at the terminal: the request of activating business is initiated to network side MEE in the terminal, if network side is also supported CSFB, and the request of activating business of network side response terminal; If end is in activated state, the eNodeB of MME in E-UTRAN sends and carries the UE contextual modifications request message that CS falls indication after rise, and indication E-UTRAN moves to the UTRAN system with the terminal; E-UTRAN sends UE contextual modifications request response as replying; If end is at Idle state, MME sends the initial context that carries CS falling indication to E-UTRAN and sets up request message, and E-UTRAN moves to the UTRAN system with the terminal with indication, and E-UTRAN transmission initial context is set up and asked response as replying.
In order to obtain the more information of Target cell, if network support E-UTRAN switches to the PS of UTRAN, then E-UTRAN can select to carry out require the terminal to send measurement report step to confirm the situation of target UTRAN sub-district.
Step 303:E-UTRAN sends to the terminal and shifts out order from EUTRA, and in shifting out order, carrying field is a CSFB process with indication, and the terminal receives that shifting out order begins to carry out handoff procedure.
Step 304:CS service request: the CS business request information is sent to the MSC of target standard in the terminal, is page response (Paging response) when called, wherein carries the CSFB indication, is the CSFB process with informing network side active procedure.
Step 305～step 310: the network side judgement: network side is received the CS service request or the page response at terminal, reads the CSFB indication; MSC does not change if the lane place has taken place to change, and the network side preservation present position-region information continues to call out; If change has also taken place MSC, network side is set up user data to terminal initiation request ID process, simultaneously, is initiated and completing place new technological process more by network side self, continues afterwards to call out, and accomplishes the PS switching flow.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for EUTRAN to the PS switching of UTRAN realized at a terminal, it is characterized in that, comprising: network side sends to the terminal through packet switching PS switching command with the location area information of Target cell;
The terminal judges according to the positional information that obtains whether the Location Area Identification LAI of Target cell changes, and when changing, initiates the position and upgrade, and initiates the circuit switching (CS) service request again.
2. method according to claim 1 is characterized in that, the location area information of said Target cell adopts the mode of carrying 3G system information container; Perhaps, be carried in the Non-Access Stratum NAS information.
3. method according to claim 2; It is characterized in that; Said network side also comprises before through packet switching PS switching command the location area information of Target cell being sent to the terminal: said terminal need make a call, and the beep-page message of network side is received at perhaps said terminal.
4. method according to claim 2 is characterized in that, said network side sends to the terminal through packet switching PS switching command with the location area information of Target cell and comprises:
Said E-UTRAN network side sends to the terminal and shifts out order from EUTRA; In shifting out order, carrying field is CS domain dropping CSFB process with indication; Said terminal receives that shifting out order begins to carry out handoff procedure, in the switching command of said E-UTRAN network side, carries the NAS information or the 3G system information of Target cell;
Said terminal is according to NAS information in the switching command or 3G system information, parses wherein location area information to obtain the LAI of Target cell.
5. method according to claim 4 is characterized in that, and is said when judging the lane place and changing, and initiates the position and upgrades and comprise:
Said terminal is initiated the position and is upgraded perhaps co-location district/route district LA/RA renewal; Perhaps,
Said terminal is initiated separate location and is upgraded, and in flow, carries out routing update again.
6. the method for EUTRAN to the PS switching of UTRAN realized at a terminal, it is characterized in that, comprising:
The terminal receives the PS switching command in the CSFB process, send out the CS service request to network side, carries in the said CS service request that to be used to indicate this CS business be the CSFB indication of initiating because of the CSFB process;
Network side is according to the location area information at the said terminal flow process that makes a call.
7. method according to claim 6 is characterized in that, said network side comprises according to the location area information at the said terminal flow process that makes a call:
If said lane place does not change, proceed call flow;
Moving exchanging center MSC does not change if said lane place changes, and said network side preservation present position-region information continues to call out;
If said lane place changes and MSC changes, said network side is set up user data to terminal initiation request ID process, simultaneously, is initiated and completing place new technological process more by said network side self, proceeds afterwards to call out.
8. method according to claim 6; It is characterized in that; Said terminal is sent out the CS service request to network side and comprised: CS business request information or page-response message are sent to the MSC of target standard in said terminal; And in this message, carry the CSFB indication, be the CSFB process with informing network side active procedure.
9. the system of EUTRAN to the PS switching of UTRAN realized at a terminal, it is characterized in that, comprises network side at least, the terminal, wherein,
Network side is used for through the PS switching command location area information of Target cell being sent to the terminal;
The terminal is used for the terminal according to the positional information that obtains, and judges whether the LAI of Target cell changes, and when changing, initiates the position and upgrade, and initiates the CS service request again.
10. the system of EUTRAN to the PS switching of UTRAN realized at a terminal, it is characterized in that, comprises network side at least, the terminal, wherein,
Network side is used for sending the PS switching command to the terminal; Receive the CS service request, confirm the realization of calling procedure according to the location area information at terminal;
The terminal is used to receive the PS switching command, initiates the CS service request to network side, and informs network side, and this CS business is initiated because of the CSFB process.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100240355A CN102612103A (en) | 2011-01-21 | 2011-01-21 | Method and system for terminal to implement PS (Packet Switching) from Evolved Universal Terrestrial Radio Access Network (EUTRAN) to Universal Terrestrial Radio Access Network (UTRAN) |
| PCT/CN2011/082378 WO2012097638A1 (en) | 2011-01-21 | 2011-11-17 | Method and system for terminal to implement ps handover from eutran to utran |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100240355A CN102612103A (en) | 2011-01-21 | 2011-01-21 | Method and system for terminal to implement PS (Packet Switching) from Evolved Universal Terrestrial Radio Access Network (EUTRAN) to Universal Terrestrial Radio Access Network (UTRAN) |
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| CN102612103A true CN102612103A (en) | 2012-07-25 |
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| CN106793064A (en) * | 2015-11-25 | 2017-05-31 | 成都鼎桥通信技术有限公司 | Location updating method and group system |
| CN105916166A (en) * | 2016-04-07 | 2016-08-31 | 广东欧珀移动通信有限公司 | Conversation control method and device under mobile communication network and mobile terminal |
| CN105916166B (en) * | 2016-04-07 | 2017-11-10 | 广东欧珀移动通信有限公司 | Call control method and device under mobile communications network |
| CN108024300A (en) * | 2016-11-02 | 2018-05-11 | 中兴通讯股份有限公司 | A kind of method, apparatus and system of reduction CSFB time delays |
| CN108024300B (en) * | 2016-11-02 | 2021-08-03 | 中兴通讯股份有限公司 | Method, device and system for reducing CSFB (Circuit switched Fall Back) time delay |
| CN108696871A (en) * | 2017-02-28 | 2018-10-23 | 中国移动通信集团设计院有限公司 | Voice call method and device |
| CN108696871B (en) * | 2017-02-28 | 2021-09-24 | 中国移动通信集团设计院有限公司 | Voice calling method and device |
| CN110637477A (en) * | 2017-06-13 | 2019-12-31 | 英特尔Ip公司 | System, method and apparatus for legacy system fallback in a cellular communication system |
| CN110637477B (en) * | 2017-06-13 | 2022-05-13 | 苹果公司 | System, method and apparatus for legacy system fallback in a cellular communication system |
| CN107959974A (en) * | 2017-12-13 | 2018-04-24 | 北京小米移动软件有限公司 | communication processing method, terminal and storage medium |
| CN107959974B (en) * | 2017-12-13 | 2021-05-18 | 北京小米移动软件有限公司 | Communication processing method, terminal and storage medium |
Also Published As
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| WO2012097638A1 (en) | 2012-07-26 |
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