CN101909342A - Method and system for circuit switching fall-back and access network elements - Google Patents
Method and system for circuit switching fall-back and access network elements Download PDFInfo
- Publication number
- CN101909342A CN101909342A CN2009100861137A CN200910086113A CN101909342A CN 101909342 A CN101909342 A CN 101909342A CN 2009100861137 A CN2009100861137 A CN 2009100861137A CN 200910086113 A CN200910086113 A CN 200910086113A CN 101909342 A CN101909342 A CN 101909342A
- Authority
- CN
- China
- Prior art keywords
- network
- carrier frequency
- target carrier
- iwf
- message
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 52
- 230000004044 response Effects 0.000 claims abstract description 46
- 241000209094 Oryza Species 0.000 claims description 43
- 235000007164 Oryza sativa Nutrition 0.000 claims description 43
- 235000021186 dishes Nutrition 0.000 claims description 43
- 235000009566 rice Nutrition 0.000 claims description 43
- 230000003213 activating effect Effects 0.000 claims description 24
- 238000004891 communication Methods 0.000 claims description 3
- 230000007774 longterm Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 10
- 230000003993 interaction Effects 0.000 abstract 1
- 230000006870 function Effects 0.000 description 10
- 238000005259 measurement Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 4
- 241000760358 Enodes Species 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005314 correlation function Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- 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]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
- H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
- H04W36/1443—Reselecting a network or an air interface over a different radio air interface technology between licensed networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The embodiment of the invention discloses a method and a system for circuit switching fall-back and access network elements, wherein the method comprises the following steps of: receiving a business expansion request, which carries a circuit switching (CS) fall-back instruction, sent by UE by a first access network element; performing interaction with the UE to determine a target carrier frequency to be fallen back to a second network of the UE; acquiring expense parameter information of the target carrier frequency from IWF, and sending the expense parameter information of the target carrier frequency to the UE; receiving a second network initial paging message or a second network paging response message which is constructed and sent by the UE according to the expense parameter information of the target carrier frequency, and transmitting the second network initial paging message or the second network paging response message to the IWF; and receiving a second network air interface service channel resource which is returned by the IWF and is distributed to the UE, and indicating the UE to fall back to the second network from a first network. The embodiment reduces the time for the UE to send the paging response message or the initial paging message in the fall-back process of a network, and reduces the time delay of the UE to fall back into a target network.
Description
Technical field
The present invention relates to the communication technology, especially a kind of circuit switching fall-back method and system, access network elements.
Background technology
In order to tackle the challenge of wireless broad band technology, keep third generation collaborative project (3rd Generation Partnership Project, hereinafter to be referred as: the 3GPP) leading superiority of network, 3GPP the end of the year 2004 formulated Long Term Evolution (Long Term Evolution, hereinafter to be referred as: LTE) plan.At present, code division multiple access (Code Division Multiple Access, hereinafter to be referred as: CDMA) 1X operator tend to select the LTE network as next generation network (Next Generation Network, hereinafter to be referred as: NGN), to satisfy growing wireless data service demand.Because the LTE network can not once put in place right, therefore, CDMA 1X operator can at first be chosen in hot zones and dispose the LTE network, and then enlarges the deployment scope of LTE network gradually.Because existing C DMA 1X network coverage is very big, disposes the LTE network at hot zones and be equivalent to the LTE network is added on the CDMA 1X network.As shown in Figure 1, disposed the CDMA 1X network diagram of LTE network at hot zones for prior art.
In order to make full use of existing Internet resources, operator will utilize existing C DMA 1X network to greatest extent disposing the LTE network with when satisfying data service.Therefore, CDMA 1X operator will be beneficial to and utilize the LTE network to provide data service for the user, and utilize CDMA 1X network to provide speech business for the user, relevant user terminals (User Equipment, hereinafter to be referred as: UE) for supporting the dual-mode terminal of CDMA 1X technology and LTE technology simultaneously, for this UE, can in the LTE network, use data service, also can in CDMA 1X network, use speech business.But the UE synchronization can only use professional in a kind of network.
When UE was positioned at the LTE network coverage area, it resided in the LTE network, and no longer monitored the CDMA signal.At this moment, if the user need use speech business in CDMA 1X network, then need fall back to CDMA 1X network by the LTE network.As shown in Figure 2, be prior art CDMA 1X circuit switching (Circuit Switched, hereinafter to be referred as: CS) fall the networking schematic diagram after rise, it comprise CDMA 1X network entity, LTE network entity and 1X CS interworking function entity (Interworking Function, hereinafter to be referred as: IWF).Wherein, CDMA 1X network entity comprises 1X Radio Transmission Technology (1X Radio Transmission Technology, hereinafter to be referred as: 1XRTT) base station sub-system (Base Station Subsystem, hereinafter to be referred as: BSS) with 1XRTT mobile switching centre (Mobile Switch Center, hereinafter to be referred as: MSC).The LTE network entity comprises base station (the evolved Node Base of evolution, hereinafter to be referred as: eNodeB), mobile management entity (Mobility Management Entity, hereinafter to be referred as: MME) with gateway (Serving Gateway, hereinafter to be referred as: S-GW).Wherein, 1XRTT BSS is used to UE that the wireless access function of eating dishes without rice or wine of CDMA 1X is provided; 1XRTT MSC is used to UE to provide the speech business hand-deliver of CDMA 1X to change function and mobile management function, comprising: correlation functions such as registration, paging, authentication; ENodeB is used to UE that the wireless access function of eating dishes without rice or wine of LTE is provided; MME is used to UE that the mobile management function of LTE is provided.S-GW is used to eNodeB that service surface data gateway function is provided, that is: LTE service in base station convergence forwarding capability is provided; 1XCS IWF is used to be connected LTE network entity and CDMA 1X network entity, and the IWF of LTE network entity and CDMA 1X network entity is provided, to realize the falling of 1XCS.
In the time of need falling back to CDMA 1X network by the LTE network for the called subscriber,, beep-page message is forwarded to MME, by MME this beep-page message is mail to UE again by 1XCS IWF if 1XRTT MSC mails to 1XCS IWF by the A1 interface with beep-page message.After UE receives this beep-page message, will leave the LTE network insertion and carry out page response, and carry out called voice service at CDMA 1X network to CDMA 1X network.
In the time of need falling back to CDMA 1X network by the LTE network for the calling subscriber, UE will leave the LTE network and be linked into CDMA 1X network when preparing to initiate audio call and carry out the caller speech business.
1XRTT CS after Fig. 3 receives beep-page message for prior art UE or prepares to initiate audio call falls flow chart after rise.As shown in Figure 3, receive the beep-page message that MME transmits as called subscriber's UE after, or be calling subscriber's UE when preparing to initiate audio call, the execution following steps:
Step 101, UE is current be in evolution the Universal Mobile Telecommunications System land radio access web (Evolved UMTS Terrestrial Radio Access Network, hereinafter to be referred as: E-UTRAN) and attached in the LTE network.And UE registers in CDMA 1X network, that is: UE is registered among the 1XRTTMSC.At this moment, UE prepares to fall back to CDMA 1X network and carries out speech business.
Step 102, UE sends the request message of activating business to MME, carries CS in the request message of activating business and falls indication after rise, and expression need be fallen back to CDMA 1X network.
Step 103, MME sends S1 Application Protocol to eNodeB, and (S1 Application Protocol hereinafter to be referred as S1AP) message, wherein carries CS and falls indication after rise, and CDMA 1X network is fallen back in expression UE request.
Step 104, eNodeB request UE reports CDMA 1X measurement report, comprises the metrical information of E-UTRAN in the CDMA 1X measurement report that UE reports.
Step 105, eNodeB determines the CDMA 1X target carrier frequency of UE falling and the physical district ID of this target carrier frequency according to the CDMA 1X measurement report that UE reports.
Wherein, step 104 and step 105 are optional, that is: also not execution in step 104 and step 105, and step 103 back is execution in step 106 directly.
Step 106, eNodeB to UE send Radio Resource control (Radio Resource Control, hereinafter to be referred as RRC) connection release message, the CDMA 1X target carrier frequency that is redirected comprising UE.
Step 107, UE leaves the LTE network after receiving the RRC connection release message of eNodeB transmission, and inserts the target carrier frequency that the RRC connection release message is carried, and inserts CDMA 1X network that is:.
Step 108, UE monitors the Overhead Message (Overhead Message) that 1XRTT BSS broadcasts by paging channel among the CDMA 1X on the target carrier frequency that inserts, comprise expense parameters such as system parameters message, access parameter messages, expanding system parameter, expansion CDMA Channel List Message in this Overhead Message.
Step 109, after UE was received Overhead Message, the access channel according to a CDMA 1X carrier frequency of expense parameter selection sent random accessing message on this access channel, initiate random access procedure.Afterwards, if UE is a called UE, then on access channel, send CDMA 1X page-response message to 1XRTT BSS; If UE is a calling UE, then on access channel, send CDMA 1X initial call message to 1XRTT BSS.
In realizing process of the present invention, the inventor finds that there is following problem at least in prior art:
After UE inserts CDMA 1X network, need to monitor the Overhead Message of 1XRTT BSS broadcasting, after only receiving these Overhead Messages, could select access channel and initiate random access procedure according to expense parameter wherein, could on access channel, send CDMA 1X page-response message or CDMA 1X initial call message afterwards.And according to existing scheme, the broadcast cycle of Overhead Message is 1.28 seconds (s), UE initiates random access procedure needs 200～400 milliseconds (ms), the existence of this two parts time has increased the time of UE transmission CDMA 1X page-response message or CDMA 1X initial call message, causes the time delay of UE access CDMA1X longer.
Summary of the invention
The embodiment of the invention provides a kind of circuit switching fall-back method and system, access network elements, reduces UE sends message in network falling process time, reduces the time delay that UE falls back to objective network.
A kind of circuit switching fall-back method that the embodiment of the invention provides comprises:
First access network elements in first network receives the request of activating business that user terminal UE sends, and carries circuit switching (CS) in this request of activating business and falls indication after rise, and this CS falls indication after rise and is used for representing that UE need fall back to second network;
Target carrier frequency in second network that definite alternately this UE of described first access network elements and described UE need fall back to;
Described first access network elements obtains the expense parameter information of described target carrier frequency from interworking function entity IWF, and the expense parameter information of this target carrier frequency is sent to described UE;
Described first access network elements receives described UE according to the expense parameter information structure of described target carrier frequency and the second network initial call message or the second ICQ response message that sends, and this second network initial call message or the second ICQ response message are transmitted to described IWF;
Second network that distributes to described UE that described first access network elements receives that described IWF the returns traffic channel resource of eating dishes without rice or wine, and indicate described UE to fall back to described second network from described first network.
A kind of access network elements that the embodiment of the invention provides comprises:
Receiver module, be used to receive the request of activating business that UE sends, carry CS in this request of activating business and fall indication after rise, this CS falls indication after rise and is used for representing that UE need fall back to second network, receive the second network initial call message or the second ICQ response message that described UE sends, and second network that distributes to described UE that returns of the IWF traffic channel resource of eating dishes without rice or wine;
Determination module is used for determining alternately with described UE the target carrier frequency of second network that this UE need fall back to;
Acquisition module is used for obtaining from IWF the expense parameter information of described target carrier frequency, and the expense parameter information of this target carrier frequency is sent to described UE;
Sending module, be used for when described receiver module receives described UE according to the expense parameter information of described target carrier frequency structure and described second network initial call message that sends or the described second ICQ response message, this second network initial call message or the second ICQ response message being transmitted to described IWF;
Indicating module is used for receiving described second network traffic channel resource of eating dishes without rice or wine at described reception mould, and indicates described sending module to send Indication message to described UE, and this Indication message is used to indicate described UE to fall back to described second network from described first network.
A kind of circuit switching fall-back system that the embodiment of the invention provides, comprise first network and second network, first access network elements in described first network is used to receive the request of activating business that UE sends, carry CS in this request of activating business and fall indication after rise, this CS falls indication after rise and is used for representing that UE need fall back to second network; Determine target carrier frequency in second network that this UE need fall back to alternately with described UE; Obtain the expense parameter information of described target carrier frequency from IWF, and the expense parameter information of this target carrier frequency is sent to described UE; Receive described UE according to the expense parameter information structure of described target carrier frequency and the second network initial call message or the second ICQ response message that sends, and this second network initial call message or the second ICQ response message are transmitted to described IWF; Second network that distributes to described UE that receives that described IWF the returns traffic channel resource of eating dishes without rice or wine, and indicate described UE to fall back to described second network from described first network.
The circuit switching fall-back method and system that provides based on the above embodiment of the present invention, access network elements, first access network elements can be determined target carrier frequency in second network that UE need fall back to alternately with UE, and send to UE obtain the expense parameter information of target carrier frequency from IWF after, make UE directly to construct the second network initial call message or the second ICQ response message according to the expense parameter information of this target carrier frequency, first access network elements receives second network to UE distributes that IWF returns at the second network initial call message or the second ICQ response message and eats dishes without rice or wine behind the traffic channel resource, directly indication UE falls back to second network from first network, therefore, need not to monitor and receive the Overhead Message of Web broadcast in second network and initiate random access procedure, thereby reduced the time that UE sends the second network initial call message or the second ICQ response message, reduce the time delay that UE inserts second network, improved user's business experience.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 has disposed the LTE network for prior art at hot zones CDMA 1X network diagram;
Fig. 2 is that prior art CDMA 1X CS falls the networking schematic diagram after rise;
1XRTTCS after Fig. 3 receives beep-page message for prior art UE or prepares to initiate audio call falls flow chart after rise;
Fig. 4 is the flow chart of an embodiment of CS drop method of the present invention;
Fig. 5 is the flow chart of another embodiment of CS drop method of the present invention;
Fig. 6 is the flow chart of another embodiment of CS drop method of the present invention;
Fig. 7 is the flow chart of another embodiment of CS drop method of the present invention;
Fig. 8 is the flow chart of another embodiment of CS drop method of the present invention;
Fig. 9 is the structural representation of an embodiment of access network elements of the present invention.
Embodiment
Fig. 4 is the flow chart of an embodiment of CS drop method of the present invention.As shown in Figure 4, it may further comprise the steps:
As one embodiment of the present of invention, second network can be a CDMA 1X network; Accordingly, first network is other arbitrary network beyond the CDMA 1X network.
Second network that distributes to UE that step 205, first access network elements receive that IWF the returns traffic channel resource of eating dishes without rice or wine, and indication UE falls back to second network from first network.
In the embodiment of the invention, first access network elements can be determined target carrier frequency in second network that UE need fall back to alternately with UE, and send to UE obtain the expense parameter information of target carrier frequency from IWF after, make UE directly to construct the second network initial call message or the second ICQ response message according to the expense parameter information of this target carrier frequency, first access network elements receives second network to UE distributes that IWF returns at the second network initial call message or the second ICQ response message and eats dishes without rice or wine behind the traffic channel resource, directly indication UE falls back to second network from first network, therefore, need not to monitor and receive the Overhead Message of Web broadcast in second network and initiate random access procedure, thereby reduced the time that UE sends the second network initial call message or the second ICQ response message, reduce the time delay that UE inserts second network, improved user's business experience.
Fig. 5 is the flow chart of another embodiment of CS drop method of the present invention.Among this embodiment, be that example describes as calling UE with UE.As shown in Figure 5, it may further comprise the steps:
Step 301, UE is attached in first network and be arranged in the Access Network of first network, and UE carries out the registration of CS territory by access network elements in first network and 1X CS IWF to 1XRTT MSC.Wherein, the Access Network in first network is also referred to as: first Access Network.Access network elements in first network is also referred to as: first access network elements.
Step 302, UE need initiate second network, that is: during the CS territory voice call service in the CDMA 1X network, send CS to first access network elements and fall indication after rise.
Step 303, first access network elements and UE carry out alternately, determine the target carrier frequency in the CDMA1X network that UE need fall back to, this target carrier frequency is made up of with physical district ID two parts the carrier frequency numbering, and physical district ID wherein also is pilot offset (PN Offset).
Step 304, first access network elements are obtained the expense parameter information of the target carrier frequency that UE need fall back to from 1XCS IWF.
As one embodiment of the present of invention, this step 304 also can be carried out prior to step 303, perhaps carrying out simultaneously with step 303, is the up-to-date expense parameter information of the UE target carrier frequency that need fall back to as long as guarantee the expense parameter information that gets access to by this step 304.
Step 305, first access network elements issues the warning order of leaving for preparing to exit first Access Network to UE, and this leaves the expense parameter information that comprises the target carrier frequency that need fall back in the warning order.
Step 306, the expense parameter information of the target carrier frequency that UE falls back to as required by the carrying mechanism of first access network elements, is left preparation request to the transmission of first access network elements, and this leaves and comprises initial call message in the preparation request.
Step 307 after first access network elements receives and leaves preparation request, is forwarded to 1XCS IWF with leaving the initial call message that carries in the preparation request.
Whether step 308 after 1XCS IWF receives initial call message, is discerned this 1XCS IWF and is integrated among the 1XRTT BSS in the CDMA 1X network and whether the target carrier frequency of carrying in the initial call message belongs to this 1XRTT BSS.If 1XCS IWF is integrated among the 1XRTT BSS, and the target carrier frequency of carrying in the initial call message belongs to this 1XRTT BSS, then distributes the CDMA 1X traffic channel resource of eating dishes without rice or wine by 1XRTT IWF/BSS to UE.Otherwise, if 1XCS IWF is not integrated among the 1XRTT BSS, perhaps the target carrier frequency of carrying in the initial call message does not belong to this 1XRTT BSS, then initiate the process of direct-cut operation to 1XRTT MSC, and obtain this 1XRTT BSS to the CDMA 1X of the UE distribution traffic channel resource of eating dishes without rice or wine from 1XRTT BSS to 1XRTT BSS by 1XCS IWF.
Step 309,1XCS IWF sends switch indicating information to first access network elements, and indication UE switches to CDMA 1X network by first network, carries the CDMA1X that distributes to the UE traffic channel resource of eating dishes without rice or wine in this switch indicating information.
Step 310, first access network elements issues the order of leaving of leaving first Access Network to UE, and this leaves the CDMA 1X that carries in the order in the switch indicating information traffic channel resource of eating dishes without rice or wine.
Step 311, UE leaves first Access Network after receiving and leaving order, and catches and leave the CDMA 1X that comprises in the order Traffic Channel of eating dishes without rice or wine.Behind the acquisition success, send CS territory voice call service handoff completion message to 1XRTT BSS.
Step 312, after 1XCS BSS received CS territory voice call service handoff completion message, whether identification UE was to switch from other 1XCS BSS to come.If then send CS territory voice call service handoff completion message to 1xRTT MSC; Otherwise, send CS territory voice call service assignment to 1XRTT MSC and finish message.
Step 313 after 1XRTT MSC receives handoff completion message, is initiated reset procedure to 1XCS IWF, removes the relevant information that 1XRTT MSC and 1XCS IWF produce in this CS territory voice call service handoff procedure.
Step 314, first access network elements is initiated the resource dispose procedure, discharges the UE context resource.
As one embodiment of the present of invention, this step 314 can be carried out any time after step 309, that is: can carry out prior to any one step of step 310-314, also can carry out with any one step of step 310-314.
Fig. 6 is the flow chart of another embodiment of CS drop method of the present invention.Among this embodiment, be that example describes as called UE with UE.As shown in Figure 6, it may further comprise the steps:
Step 401, UE is attached in first network and be arranged in the Access Network of first network, and, carry out the registration of CS territory by first access network elements in first network and 1XCS IWF to 1XRTT MSC.
Step 402, second network, that is: the 1XRTT MSC in the CDMA 1X network sends the paging request to 1XCS IWF.
Step 403,1XCS IWF sends CS territory voice paging request by first access network elements to UE.
Step 404, UE sends CS to first access network elements and falls indication after rise.
Step 405, first access network elements and UE carry out alternately, determine the target carrier frequency in the CDMA1X network that UE need fall back to, and this target carrier frequency is made up of with physical district ID two parts the carrier frequency numbering, and physical district ID wherein also is a pilot offset.
Step 406, first access network elements are obtained the expense parameter information of the target carrier frequency that UE need fall back to from 1XCS IWF.
As one embodiment of the present of invention, this step 406 also can be carried out prior to step 405, perhaps carrying out simultaneously with step 405, is the up-to-date expense parameter information of the UE target carrier frequency that need fall back to as long as guarantee the expense parameter information that gets access to by this step 406.
Step 407, first access network elements issues the warning order of leaving for preparing to exit first Access Network to UE, and this leaves the expense parameter information that comprises the target carrier frequency that need fall back in the warning order.
Step 408, the expense parameter information of the target carrier frequency that UE falls back to as required, by the carrying mechanism of first access network elements, send the preparation request of leaving for preparing to exit first access network elements to first access network elements, this leaves and comprises page-response message in the preparation request.
Step 409 after first access network elements receives and leaves preparation request, is forwarded to 1XCS IWF with leaving the page-response message of carrying in the preparation request.
Whether step 410 after 1XCS IWF receives page-response message, is discerned this 1XCS IWF and is integrated among the 1XRTT BSS in the CDMA 1X network and whether the target carrier frequency of carrying in the initial call message belongs to this 1XRTT BSS.If 1XCS IWF is integrated among the 1XRTT BSS, and the target carrier frequency of carrying in the page-response message belongs to this 1XRTT BSS, then distributes the CDMA 1X traffic channel resource of eating dishes without rice or wine by 1XRTT IWF/BSS to UE.Otherwise, if 1XCS IWF is not integrated among the 1XRTT BSS, perhaps the target carrier frequency of carrying in the initial call message does not belong to this 1XRTT BSS, then initiate the process of direct-cut operation to 1XRTT MSC, and obtain this 1XRTT BSS to the CDMA 1X of the UE distribution traffic channel resource of eating dishes without rice or wine from 1XRTT BSS to 1XRTT BSS by 1XCS IWF.
Step 411,1XCS IWF sends switch indicating information to first access network elements, and indication UE switches to CDMA 1X network by first network, carries the CDMA1X that distributes to the UE traffic channel resource of eating dishes without rice or wine in this switch indicating information.
Step 412, first access network elements issues the order of leaving of leaving first Access Network to UE, and this leaves the CDMA 1X that carries in the order in the switch indicating information traffic channel resource of eating dishes without rice or wine.
Step 413, UE leaves first Access Network after receiving and leaving order, and catches and leave the CDMA 1X that comprises in the order Traffic Channel of eating dishes without rice or wine, also promptly: insert this CDMA 1X Traffic Channel of eating dishes without rice or wine.Behind the acquisition success, send CS territory voice call service handoff completion message to 1XRTT BSS.
Step 414, after 1XCS BSS received CS territory voice call service handoff completion message, whether identification UE was to switch from other 1XCS BSS to come.If then send CS territory voice call service handoff completion message to 1xRTT MSC; Otherwise, send CS territory voice call service assignment to 1XRTT MSC and finish message.
Step 415 after 1XRTT MSC receives CS territory voice call service handoff completion message, is initiated reset procedure to 1XCS IWF, removes the relevant information that 1XRTT MSC and 1XCS IWF produce in this CS territory voice call service handoff procedure.
Step 416,1XCS BSS initiates audio call ring process to UE.
Step 417, UE sends to call out to 1XCS BSS and answers order.
Step 418,1XCS BSS receive call out answer order after, return to call out to answer to UE and reply, and answer order to 1XRTT MSC forwarded call.At this moment, CS territory voice call service is set up and is finished.
In addition, step 416 also can be carried out with step 415 or be carried out prior to step 415 simultaneously.
Step 419, first access network elements is initiated the resource dispose procedure, discharges the UE context resource.
As one embodiment of the present of invention, this step 419 can be carried out any time after step 412, that is: can carry out prior to any one step of step 413-418, also can carry out with any one step of step 413-418.
According to one embodiment of present invention, among Fig. 5 and the embodiment shown in Figure 6, first network can be the LTE network, and is corresponding, and Access Network is E-UTRAN, and first access network elements comprises eNodeB and MME.According to another embodiment of the invention, first network among Fig. 5 and the embodiment shown in Figure 6 also can be HRPD (high rate packet data) (High Rate Packet Data, hereinafter to be referred as: HRPD) network, accordingly, first access network elements is that (access network is hereinafter to be referred as the network element that AN) comprises for access network.According to still a further embodiment, first network among Fig. 5 and the embodiment shown in Figure 6 can also be micro-wave access global inter communication (Worldwide Interoperability for Microwave Access, hereinafter to be referred as: WiMAX) network, accordingly, first access network elements comprises base station (base station, hereinafter to be referred as: BS) with gateway (GateWay, hereinafter to be referred as: GW).In addition, first network also can be the network arbitrarily beyond the CDMA 1X network.Wherein, the BS among the WiMAX is corresponding to the eNodeB in the LTE network, and the GW among the WiMAX is corresponding to the MME in the LTE network.
Fig. 7 is the flow chart of another embodiment of CS drop method of the present invention.Among this embodiment, be that example describes as first network, UE as calling UE, stand good for the situation of first other network of network using with the LTE network.As shown in Figure 7, it may further comprise the steps:
Step 501, UE is attached in the LTE network and be arranged in E-UTRAN, and UE is by eNodeB, MME among the E-UTRAN, and 1X CS IWF carries out the registration of CS territory to 1XRTT MSC.
Step 502 when UE need initiate CS territory voice call service in the CDMA 1X network, sends activating business request to MME, comprises in this request of activating business that CS falls after rise to indicate, and expression need be fallen back in the CDMA 1X network.
Step 503, MME sends S1 AP message to eNodeB, wherein carries CS and falls indication after rise, and CDMA 1X network is fallen back in expression UE request.
Step 504, eNodeB request UE reporting measurement reports, each measuring object in the measurement report all comprises following information: the physical district ID of carrier frequency, carrier frequency.
Step 505, eNodeB is according to measurement report, determines the candidate target carrier frequency in the CDMA 1X network that UE need fall back to, and this candidate target carrier frequency is made up of with physical district ID two parts the carrier frequency numbering, and physical district ID wherein also is a pilot offset.Wherein, the candidate target carrier frequency can be one, also can be a plurality of.
Step 506, eNodeB sends S11X parameter request, the expense parameter information of the candidate target carrier frequency that acquisition request UE need fall back to MME.
Step 507 after MME receives S1 1X parameter request, sends S102 1X parameter request to 1XCS IWF, the candidate target carrier frequency that need fall back to comprising UE.
Step 508,1XCS IWF is by S102 1X parameter response message, and the expense parameter information of the candidate target carrier frequency that UE need be fallen back to sends to MME.
As one embodiment of the present of invention, this step 506-step 509 also can be carried out prior to step 504-step 505, perhaps carrying out simultaneously with step 504-step 505, is the up-to-date expense parameter information of candidate target carrier frequency as long as guarantee by the expense parameter information that step 506-step 509 gets access to.
Step 510 after eNodeB determines the expense parameter information of candidate target carrier frequency, issues the warning order of leaving for preparing to exit EUTRAN to UE, and this leaves the expense parameter information that comprises the candidate target carrier frequency in the warning order.
Step 511, UE selects a target carrier frequency according to the expense parameter information of the candidate target carrier frequency that issues, and sends the preparation request of leaving for preparing to exit EUTRAN to eNodeB, comprising this UE ID and CDMA 1X initial call message.
Step 512, eNodeB receives after message leaves preparation request, sends up S1 tunnel message to MME, comprising UE ID, CDMA 1X initial call message and this eNode corresponding district ID.
Step 513 after MME receives the S1 tunnel message, is selected 1XCS IWF according to the sub-district ID that carries in the S1 tunnel message, and is transmitted message by S102, will leave the 1XCS IWF that the CDMA 1X initial call message that carries in the preparation request is forwarded to selection.In addition, S102 transmits in the message and also comprises UE ID.
Whether step 514 after 1XCS IWF receives CDMA 1X initial call message, is discerned this 1XCS IWF and is integrated among the 1XRTT BSS in the CDMA 1X network and whether the target carrier frequency of carrying in the initial call message belongs to this 1XRTT BSS.If 1XCS IWF is integrated among the 1XRTT BSS, and the target carrier frequency of carrying in the CDMA 1X initial call message belongs to this 1XRTT BSS, then distributes the CDMA 1X traffic channel resource of eating dishes without rice or wine by 1XRTT IWF/BSS to UE.Otherwise, if 1XCS IWF is not integrated among the 1XRTT BSS, perhaps the target carrier frequency of carrying in the initial call message does not belong to this 1XRTT BSS, then initiate the process of direct-cut operation to 1XRTT MSC, and obtain this 1XRTT BSS to the CDMA 1X of the UE distribution traffic channel resource of eating dishes without rice or wine from 1XRTT BSS to 1XRTT BSS by 1XCS IWF.
Step 515,1XCS IWF sends S102 to MME and transmits message, wherein carries switch indicating information, and indication UE switches to CDMA 1X network by the LET network, carries the CDMA 1X that distributes to the UE traffic channel resource of eating dishes without rice or wine in this switch indicating information.
Step 516, MME sends descending S1 tunnel message to eNodeB, wherein carries switch indicating information and the CDMA 1X traffic channel resource of eating dishes without rice or wine.
Step 517 after eNodeB receives descending S1 tunnel message, issues the order of leaving of leaving EUTRAN to UE, wherein carries switch indicating information and the CDMA 1X traffic channel resource of eating dishes without rice or wine.
Step 518 after UE receives and leaves order, is left the LTE network, and catches and leave the CDMA 1X that comprises in the order Traffic Channel of eating dishes without rice or wine.
Step 519, UE catches CDMA 1X and eats dishes without rice or wine after the Traffic Channel success, and the Traffic Channel of will eating dishes without rice or wine by the CDMA1X that catches sends CS territory voice call service handoff completion message to 1XRTT BSS.
Step 520,1XCS BSS receives whether identification UE is to switch from other 1XCS BSS to come behind the voice call service handoff completion message of CS territory.If then send CS territory voice call service handoff completion message to 1xRTT MSC; Otherwise, then send CS territory voice call service assignment and finish message to 1XRTT MSC.
Step 521 after 1XRTT MSC receives CS territory voice call service handoff completion message, is initiated reset procedure to 1XCS IWF, removes the relevant information that 1XRTT MSC and 1XCS IWF produce in this CS territory voice call service handoff procedure.
Step 522, eNodeB sends the S1UE context resource to MME and discharges request.
Step 523, MME sends professional hang-up of S1 to S-GW and asks.
Step 524, S-GW hangs up relevant bearer service after receiving the professional hang-up request of S1, and returns the professional hang-up of S1 to MME and reply.
Step 525, MME receive S1 professional hang up reply after, initiate UE context resource dispose procedure to eNodeB, discharge the UE context resource.
As one embodiment of the present of invention, step 522-525 can carry out any time after step 516, that is: can carry out prior to any one step of step 517-521, also can carry out with any one step of step 517-521.
If UE supports CS drop method of the present invention, then in the step 501, UE is in the process of adhering to the LTE network, need adhere to the falling ability information of carrying enhancing in the request or supporting the wireless voice call continuity to what MME sent that (Single Radio Voice Call Continuity is hereinafter to be referred as SRVCC) ability information by eNodeB.Accordingly, in the step 503, MME corresponding CS that carries enhancing in the S1 AP message that eNodeB sends falls indication after rise or CS falls indication+SRVCC ability information after rise.
Fig. 8 is the flow chart of another embodiment of CS drop method of the present invention.Among this embodiment, be that example describes as first network, UE as called UE, stand good for the situation of first other network of network using with the LTE network.As shown in Figure 8, it may further comprise the steps:
Step 601, UE is attached in the LTE network and be arranged in E-UTRAN, and UE is by eNodeB, MME among the E-UTRAN, and 1X CS IWF carries out the registration of CS territory to 1XRTT MSC.
Step 602,1XRTT MSC sends the paging request to 1XCS IWF.
Step 603,1XCS IWF sends CS territory voice paging request to MME.
Step 604, MME sends descending S1 tunnel message to eNodeB, comprising the voice paging request of CS territory.
Step 605, eNodeB sends S102 to UE and transmits message, comprising the voice paging request of CS territory.
Step 606, UE sends the request of activating business to MME, comprises in this request of activating business that CS falls indication after rise, and expression need be fallen back in the CDMA 1X network.
Step 607, MME sends S1 AP message to eNodeB, wherein carries CS and falls indication after rise, and CDMA 1X network is fallen back in expression UE request.
Step 608, eNodeB request UE reporting measurement reports, each measuring object in the measurement report all comprises following information: the physical district ID of carrier frequency, carrier frequency.
Step 609, eNodeB is according to measurement report, determines the candidate target carrier frequency in the CDMA 1X network that UE need fall back to, and this candidate target carrier frequency is made up of with physical district ID two parts the carrier frequency numbering, and physical district ID wherein also is a pilot offset.Wherein, the candidate target carrier frequency can be one, also can be a plurality of.
Step 610, eNodeB sends S1 1X parameter request, the expense parameter information of the candidate target carrier frequency that acquisition request UE need fall back to MME.
Step 611 after MME receives S1 1X parameter request, sends S102 1X parameter request to 1XCS IWF, the candidate target carrier frequency that need fall back to comprising UE.
Step 612,1XCS IWF is by S102 1X parameter response message, and the expense parameter information of the candidate target carrier frequency that UE need be fallen back to sends to MME.
Step 613, MME sends S1 1X parameter to eNodeB and replys, comprising the expense parameter information of candidate target carrier frequency.
As one embodiment of the present of invention, this step 610-step 613 also can be carried out prior to step 608-step 609, perhaps carrying out simultaneously with step 608-step 609, is the up-to-date expense parameter information of candidate target carrier frequency as long as guarantee by the expense parameter information that step 610-step 613 gets access to.
Step 614 after eNodeB determines the expense parameter information of candidate target carrier frequency, issues the warning order of leaving for preparing to exit EUTRAN to UE, and this leaves the expense parameter information that comprises the candidate target carrier frequency in the warning order.
Step 615, UE selects a target carrier frequency according to the expense parameter information of the candidate target carrier frequency that issues, and sends the preparation request of leaving for preparing to exit EUTRAN to eNodeB, comprising this UE ID and CDMA 1X page-response message.
Step 616, eNodeB receives after message leaves preparation request, sends up S1 tunnel message to MME, comprising UE ID, CDMA 1X page-response message and this eNode corresponding district ID.
Step 617 after MME receives the S1 tunnel message, is selected 1XCS IWF, and is transmitted message by S102, will leave the 1XCSIWF that the CDMA 1X page-response message of carrying in the preparation request is forwarded to selection.In addition, S102 transmits in the message and also comprises UE ID.
Particularly, MME can adopt following dual mode to select 1XCS IWF:
First kind of mode is: obtain the sub-district ID that carries in the S1 tunnel message, according to the corresponding relation between sub-district ID that sets in advance and the 1XCS IWF, choose with page-response message in the corresponding 1XCS IWF of sub-district ID that carries;
The second way is: MME selects to send in the step 603 1XCSIWF of CS territory voice paging request.
Whether step 618 after 1XCS IWF receives CDMA 1X page-response message, is discerned this 1XCS IWF and is integrated among the 1XRTT BSS in the CDMA 1X network and whether the target carrier frequency of carrying in the initial call message belongs to this 1XRTT BSS.If 1XCS IWF is integrated among the 1XRTT BSS, and the target carrier frequency of carrying in the CDMA 1X page-response message belongs to this 1XRTT BSS, then distributes the CDMA 1X traffic channel resource of eating dishes without rice or wine by 1XRTT IWF/BSS to UE.Otherwise, if 1XCS IWF is not integrated among the 1XRTTBSS, perhaps the target carrier frequency of carrying in the initial call message does not belong to this 1XRTT BSS, then initiate the process of direct-cut operation to 1XRTT MSC, and obtain this 1XRTT BSS to the CDMA 1X of the UE distribution traffic channel resource of eating dishes without rice or wine from 1XRTT BSS to 1XRTT BSS by 1XCSIWF.
Step 619,1XCS IWF sends S102 to MME and transmits message, wherein carries switch indicating information, and indication UE switches to CDMA 1X network by the LET network, carries the CDMA 1X that distributes to the UE traffic channel resource of eating dishes without rice or wine in this switch indicating information.
Step 620, MME sends descending S1 tunnel message to eNodeB, wherein carries switch indicating information and the CDMA 1X traffic channel resource of eating dishes without rice or wine.
Step 621 after eNodeB receives descending S1 tunnel message, issues the order of leaving of leaving EUTRAN to UE, wherein carries switch indicating information and the CDMA 1X traffic channel resource of eating dishes without rice or wine.
Step 622 after UE receives and leaves order, is left the LTE network, and catches and leave the CDMA 1X that comprises in the order Traffic Channel of eating dishes without rice or wine.
Step 623, UE catches CDMA 1X and eats dishes without rice or wine after the Traffic Channel success, and the Traffic Channel of will eating dishes without rice or wine by the CDMA1X that catches sends CS territory voice call service handoff completion message to 1XRTT BSS.
Step 624, after 1XCS BSS received CS territory voice call service handoff completion message, whether identification UE was to switch from other 1XCS BSS to come.If then send CS territory voice call service handoff completion message to 1xRTT MSC; Otherwise, then send CS territory voice call service assignment and finish message to 1XRTT MSC.
Step 625 after 1XRTT MSC receives CS territory voice call service handoff completion message, is initiated reset procedure to 1XCS IWF, removes the relevant information that 1XRTT MSC and 1XCS IWF produce in this CS territory voice call service handoff procedure.
Step 626, eNodeB sends the S1UE context resource to MME and discharges request.
Step 627, MME sends professional hang-up of S1 to S-GW and asks.
Step 628, S-GW hangs up bearer service after receiving the professional hang-up request of S1, and returns professional hang-up of S1 to MME and reply.
Step 629, MME receive S1 professional hang up reply after, initiate UE context resource dispose procedure to eNodeB, discharge the UE context resource.
As one embodiment of the present of invention, step 626-629 can carry out any time after step 620, that is: can carry out prior to any one step of step 620-625, also can carry out with any one step of step 620-625.
If UE supports CS drop method of the present invention, then in the step 601, UE is in the process of adhering to the LTE network, need adhere to the falling ability information of carrying enhancing in the request or supporting the wireless voice call continuity to what MME sent that (Single Radio Voice Call Continuity is hereinafter to be referred as SRVCC) ability information by eNodeB.Accordingly, in the step 607, MME corresponding CS that carries enhancing in the S1 AP message that eNodeB sends falls indication after rise or CS falls indication+SRVCC ability information after rise.
Fig. 9 is the structural representation of an embodiment of access network elements of the present invention, the access network element of this embodiment can be used for realizing embodiment illustrated in fig. 4 in the associative operation of first access network elements.As shown in Figure 9, the access network element of this embodiment comprises receiver module 701, determination module 702, acquisition module 703, sending module 704 and indicating module 705.
Wherein, receiver module 701 is used to receive the request of activating business that UE sends, carry CS in this request of activating business and fall indication after rise, this CS falls indication after rise and is used for representing that UE need fall back to second network, receive the second network initial call message or the second ICQ response message that UE sends, and second network that distributes to UE that returns of the IWF traffic channel resource of eating dishes without rice or wine.
The embodiment of the invention also provides a kind of circuit switching fall-back system, and it comprises first network and second network.Wherein, first access network elements in first network receives the request of activating business that user terminal UE sends, carry circuit switching (CS) in this request of activating business and fall indication after rise, this CS falls indication after rise and is used for representing that UE need fall back to second network, determine target carrier frequency in second network that this UE need fall back to alternately with UE, first access network elements obtains the expense parameter information of target carrier frequency from interworking function entity IWF, and the expense parameter information of this target carrier frequency sent to UE, first access network elements receives UE according to the expense parameter information structure of target carrier frequency and the second network initial call message or the second ICQ response message that sends, and this second network initial call message or the second ICQ response message be transmitted to IWF, first access network elements receives second network to UE distributes that IWF returns and eats dishes without rice or wine behind the traffic channel resource, and indication UE falls back to second network from first network.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted last that: above embodiment is only in order to illustrating technical scheme of the present invention, but not the present invention is made restrictive sense.Although the present invention is had been described in detail with reference to above-mentioned preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and this modification or be equal to the spirit and scope that replacement does not break away from technical solution of the present invention.
Claims (5)
1. a circuit switching fall-back method is characterized in that, comprising:
First access network elements in first network receives the request of activating business that user terminal UE sends, and carries circuit switching (CS) in this request of activating business and falls indication after rise, and this CS falls indication after rise and is used for representing that UE need fall back to second network;
Target carrier frequency in second network that definite alternately this UE of described first access network elements and described UE need fall back to;
Described first access network elements obtains the expense parameter information of described target carrier frequency from interworking function entity IWF, and the expense parameter information of this target carrier frequency is sent to described UE;
Described first access network elements receives described UE according to the expense parameter information structure of described target carrier frequency and the second network initial call message or the second ICQ response message that sends, and this second network initial call message or the second ICQ response message are transmitted to described IWF;
Second network that distributes to described UE that described first access network elements receives that described IWF the returns traffic channel resource of eating dishes without rice or wine, and indicate described UE to fall back to described second network from described first network.
2. method according to claim 1 is characterized in that, described first network is a Long Term Evolution LTE network, and described first access network elements comprises the base station eNodeB and the mobile management entity MME of evolution;
Perhaps, described first network is a HRPD (high rate packet data) HRPD network, the network element that described first access network elements comprises for access network AN;
Perhaps, described first network is a micro-wave access global inter communication WiMAX network, and described first access network elements comprises base station BS and gateway GW.
3. method according to claim 1 and 2 is characterized in that, described second network is a code division multiple access CDMA 1X network.
4. an access network elements is characterized in that, comprising:
Receiver module, be used to receive the request of activating business that UE sends, carry CS in this request of activating business and fall indication after rise, this CS falls indication after rise and is used for representing that UE need fall back to second network, receive the second network initial call message or the second ICQ response message that described UE sends, and second network that distributes to described UE that returns of the IWF traffic channel resource of eating dishes without rice or wine;
Determination module is used for determining alternately with described UE the target carrier frequency of second network that this UE need fall back to;
Acquisition module is used for obtaining from IWF the expense parameter information of described target carrier frequency, and the expense parameter information of this target carrier frequency is sent to described UE;
Sending module, be used for when described receiver module receives described UE according to the expense parameter information of described target carrier frequency structure and described second network initial call message that sends or the described second ICQ response message, this second network initial call message or the second ICQ response message being transmitted to described IWF;
Indicating module is used for receiving described second network traffic channel resource of eating dishes without rice or wine at described reception mould, and indicates described sending module to send Indication message to described UE, and this Indication message is used to indicate described UE to fall back to described second network from described first network.
5. circuit switching fall-back system, comprise first network and second network, it is characterized in that, first access network elements in described first network is used to receive the request of activating business that UE sends, carry CS in this request of activating business and fall indication after rise, this CS falls indication after rise and is used for representing that UE need fall back to second network; Determine target carrier frequency in second network that this UE need fall back to alternately with described UE; Obtain the expense parameter information of described target carrier frequency from IWF, and the expense parameter information of this target carrier frequency is sent to described UE; Receive described UE according to the expense parameter information structure of described target carrier frequency and the second network initial call message or the second ICQ response message that sends, and this second network initial call message or the second ICQ response message are transmitted to described IWF; Second network that distributes to described UE that receives that described IWF the returns traffic channel resource of eating dishes without rice or wine, and indicate described UE to fall back to described second network from described first network.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910086113A CN101909342B (en) | 2009-06-02 | 2009-06-02 | Method and system for circuit switching fall-back and access network elements |
| PCT/CN2010/072089 WO2010139213A1 (en) | 2009-06-02 | 2010-04-23 | Method and system for circuit switched fallback, and net element of access network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910086113A CN101909342B (en) | 2009-06-02 | 2009-06-02 | Method and system for circuit switching fall-back and access network elements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101909342A true CN101909342A (en) | 2010-12-08 |
| CN101909342B CN101909342B (en) | 2012-09-05 |
Family
ID=43264626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910086113A Expired - Fee Related CN101909342B (en) | 2009-06-02 | 2009-06-02 | Method and system for circuit switching fall-back and access network elements |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101909342B (en) |
| WO (1) | WO2010139213A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011107041A2 (en) * | 2011-04-19 | 2011-09-09 | 华为技术有限公司 | Method and system for processing circuit switched fallback service, mobility management entity and user equipment |
| WO2012155435A1 (en) * | 2011-05-18 | 2012-11-22 | 中兴通讯股份有限公司 | Method, base transceiver station and access terminal supporting multi-carrier frequency access |
| WO2012162961A1 (en) * | 2011-08-24 | 2012-12-06 | 华为技术有限公司 | Circuit-switched fallback processing method, device and system |
| CN103068010A (en) * | 2012-12-26 | 2013-04-24 | 华为技术有限公司 | Selection method and device of target area |
| CN103313426A (en) * | 2012-03-16 | 2013-09-18 | 华为技术有限公司 | Signaling connection establishment cause indication and identification methods and devices |
| CN103563441A (en) * | 2011-04-05 | 2014-02-05 | 高通股份有限公司 | Simultaneous acquisition of a td-scdma network in circuit-switched fallback from tdd-lte systems |
| CN105025536A (en) * | 2014-04-29 | 2015-11-04 | 中国电信股份有限公司 | Long term evolution (LTE) to evolution high-rate packet data (eHRPD) switching method, LTE to eHRPD system, terminal and evolved node B (eNB) |
| CN105472680A (en) * | 2015-11-17 | 2016-04-06 | 中科创达软件股份有限公司 | Voice call method and voice call system for mobile terminal |
| WO2017113118A1 (en) * | 2015-12-29 | 2017-07-06 | 华为技术有限公司 | Service fallback method and apparatus, and communication system |
| WO2018041097A1 (en) * | 2016-08-30 | 2018-03-08 | 中兴通讯股份有限公司 | Network switching method and device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103002531B (en) * | 2012-12-17 | 2016-01-13 | 东莞宇龙通信科技有限公司 | Multi-mode single-standby mobile terminal and communication means |
| CN105050147B (en) * | 2015-06-30 | 2020-12-11 | 中兴通讯股份有限公司 | Method and device for voice fallback in switching process |
| CN110505687B (en) * | 2018-05-17 | 2022-03-29 | 大唐移动通信设备有限公司 | Paging message response method, device, terminal, network side equipment and medium |
| CN115250441B (en) * | 2021-04-28 | 2023-08-15 | 中国移动通信集团河北有限公司 | Method, device, equipment and medium for determining voice fallback time delay information |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1889756B (en) * | 2005-07-16 | 2010-05-12 | 华为技术有限公司 | Method for double-mode terminal switching between block field and circuit field |
| GB0615695D0 (en) * | 2006-08-08 | 2006-09-13 | Lucent Technologies Inc | Call continuity |
| US8885599B2 (en) * | 2006-12-28 | 2014-11-11 | Nokia Corporation | Handover of circuit-switched call to packet-switched call, and vice versa |
| KR101392099B1 (en) * | 2007-05-21 | 2014-05-08 | 삼성전자주식회사 | Apparatus and method for call handover between packet network system and circuit network system |
| BRPI0721770B8 (en) * | 2007-06-08 | 2019-12-10 | Ericsson Telefon Ab L M | method for manipulating a circuit-switched and enodeb fallbak mechanism |
| CN101222765B (en) * | 2008-01-24 | 2012-06-06 | 中兴通讯股份有限公司 | Control method, system and device for circuit field fall-back |
-
2009
- 2009-06-02 CN CN200910086113A patent/CN101909342B/en not_active Expired - Fee Related
-
2010
- 2010-04-23 WO PCT/CN2010/072089 patent/WO2010139213A1/en active Application Filing
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103563441A (en) * | 2011-04-05 | 2014-02-05 | 高通股份有限公司 | Simultaneous acquisition of a td-scdma network in circuit-switched fallback from tdd-lte systems |
| CN103563441B (en) * | 2011-04-05 | 2017-03-29 | 高通股份有限公司 | In the circuit switched fallback from TDD LTE systems to while TD SCDMA networks capture |
| WO2011107041A3 (en) * | 2011-04-19 | 2012-04-19 | 华为技术有限公司 | Method and system for processing circuit switched fallback service, mobility management entity and user equipment |
| WO2011107041A2 (en) * | 2011-04-19 | 2011-09-09 | 华为技术有限公司 | Method and system for processing circuit switched fallback service, mobility management entity and user equipment |
| WO2012155435A1 (en) * | 2011-05-18 | 2012-11-22 | 中兴通讯股份有限公司 | Method, base transceiver station and access terminal supporting multi-carrier frequency access |
| WO2012162961A1 (en) * | 2011-08-24 | 2012-12-06 | 华为技术有限公司 | Circuit-switched fallback processing method, device and system |
| CN103313426A (en) * | 2012-03-16 | 2013-09-18 | 华为技术有限公司 | Signaling connection establishment cause indication and identification methods and devices |
| CN103313426B (en) * | 2012-03-16 | 2016-08-10 | 华为技术有限公司 | The instruction of signaling connection establishment reason and recognition methods and device |
| CN103068010A (en) * | 2012-12-26 | 2013-04-24 | 华为技术有限公司 | Selection method and device of target area |
| CN105025536A (en) * | 2014-04-29 | 2015-11-04 | 中国电信股份有限公司 | Long term evolution (LTE) to evolution high-rate packet data (eHRPD) switching method, LTE to eHRPD system, terminal and evolved node B (eNB) |
| CN105472680A (en) * | 2015-11-17 | 2016-04-06 | 中科创达软件股份有限公司 | Voice call method and voice call system for mobile terminal |
| WO2017113118A1 (en) * | 2015-12-29 | 2017-07-06 | 华为技术有限公司 | Service fallback method and apparatus, and communication system |
| WO2018041097A1 (en) * | 2016-08-30 | 2018-03-08 | 中兴通讯股份有限公司 | Network switching method and device |
| CN108307454A (en) * | 2016-08-30 | 2018-07-20 | 中兴通讯股份有限公司 | Method for switching network and device |
| CN108307454B (en) * | 2016-08-30 | 2022-03-25 | 中兴通讯股份有限公司 | Network switching method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101909342B (en) | 2012-09-05 |
| WO2010139213A1 (en) | 2010-12-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101909342B (en) | Method and system for circuit switching fall-back and access network elements | |
| US9565555B2 (en) | Method and apparatus for managing user equipment history information in wireless communication network | |
| US9338708B2 (en) | Method and apparatus of communication | |
| US10805844B2 (en) | Method and apparatus for performing communication by UE in wireless communication system supporting circuit switched fallback service | |
| CN102892081B (en) | Service redirection method, UE (user equipment), access network node and system | |
| US20150312809A1 (en) | Method and device for selecting long term evolution lte network | |
| EP2343918A2 (en) | Circuit switched fallback | |
| US9854480B2 (en) | Method for selecting long term evolution LTE network and device | |
| CN102067669A (en) | Method and system for managing handover in radio access networks | |
| JP2012525737A (en) | Paging method, location update method, and device | |
| CN102209370B (en) | LTE multimode terminal has issued the method for circuit domain voice call at LTE access module | |
| CN108616822B (en) | Method for reselecting group calling called cell of LTE (Long term evolution) trunking system | |
| US9860734B2 (en) | Method and device of supporting group mobility | |
| CN101179839A (en) | Isomerized network switch method, system, terminal and network | |
| CN108924823B (en) | Dual-connection configuration method and device, base station and user equipment | |
| CN102056113A (en) | Method and base station for processing emergency service switching | |
| US9769640B2 (en) | Emergency center selection method, device, and system | |
| EP3447990B1 (en) | Information transmission method and device | |
| CA2890001A1 (en) | Method, device, and system for returning to long term evolution lte network | |
| CN106063327A (en) | Method for processing voice service and terminal | |
| CN102932833A (en) | Network switching control method, communication system and associated equipment | |
| CN101400080B (en) | Cell capability notifying method and radio network control entity | |
| US20220417728A1 (en) | Method and apparatus for radio access network based notification area update | |
| WO2014131176A1 (en) | Wireless communication method and device | |
| EP3618558B1 (en) | Method for enabling network to fall back and access network device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 |