CN102687564A - Method, apparatus and system for selecting target radio access technology - Google Patents
Method, apparatus and system for selecting target radio access technology Download PDFInfo
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Abstract
A method and related apparatus for selecting target radio access technology (RAT) are provided. Wherein, the selection method includes that an evolved Node B eNodeB receives an S1 application protocol S1-AP request message sent by a mobility management entity MME, and acquires radio access technology RAT information of a circuit switch (CS) domain; and the eNodeB determines the target RAT according to the RAT information of the CS domain. With the embodiments of the present invention, the processing delay in the whole CS fallback (CSFB) flow caused by the extra location area update flow and the roaming retry flow is decreased, and the success rate of service and user experience are raised.
Description
The system of selection of Target Wireless access technology, device and system
Technical field
The present invention relates to mobile communication technology field, the more particularly to system of selection of Target Wireless access technology, device and system.
Background technology
By E-UTRAN (Evolved Universal Mobile Telecommunication System Territorial Access Network, evolved universal GSM land radio access web) and EPC (Evolved Packet Core Network, evolution block core net）It may be constructed an EPS (Evolved Packet System) evolved packet system.But in the circuit domain that many business are all operated in 2G or 3G based on current operator, also it is accomplished by EPS networks reusing existing circuit domain business.Therefore, it is proposed to realize CSFB (CS Fallback, circuit domain dropping）Requirement.So-called CSFB, it is exactly by EPS network connections to circuit domain core net, so that UE (User Equipment, user terminal) can be initiated and receiving circuit domain business in EPS networks, and circuit domain completion circuit domain business is returned to by E-UTRAN.
In CSFB flows are performed, UE in E-UTRAN by performing joint attachment or joint tracing section updating flow, realize MSC/VLR (the Mobile Switching Center/Visitor Location Register, mobile switching centre/visitor location register from EPS network registry to circuit domain core net）On.Wherein, MME (Mobile Management Entity, mobility management entity）For PLMN (the Public Land Mobile Network, public land mobile net in UE selection circuits domain）, distribute corresponding LAI (Location Area Identifier, Location Area Identification), and select corresponding MSC/VLR.
In CSFB flows are performed, generally require eNodeB (E-UTRAN NodeB, E-UTRAN NodeB) information of the MME for the UE MSC/VLR places networks selected is known according to the Μ Μ Ε PLMN selected, for example, the PLMN information of place network, and then be UE selection target PLMN, reselection Target cell.For example, if UE and network side all support PS HO (PS Handover, packet-switched domain switches), eNodeB is in PS HO flows are performed, the information of network where the MSC/VLR that MME selects for UE can be known according to the MME PLMN selected, and then be UE selection target PLMN, reselection Target cell.
The network architecture of a kind of 2G networks and/or 3G network mixed networking is there is currently, for example, global system for mobile communications（Global System for Mobile Communications, cylinder claims GSM)/improve number
According to the GSM evolution technologies of speed（Enhanced Data rate for GSM Evolution, cylinder claims EDGE) wireless access network（GSM EDGE Radio Access Network, cylinder claims GERAN) and UMTS（UMTS) land radio access web（Universal Mobile Telecommunication System Territorial Radio Access Network, cylinder claims UTRAN) mixed networking.Under specific scene, two networks of above-mentioned mixed networking may be identified using identical PLMN, and MSC/VLR is disposed respectively in two networks of networking.Now, because two networks of networking are identified using identical PLMN, eNodeB will be unable to the just blunt particular type that the selected MSC/VLR places networks of MME are known according to PLMN marks, for example, RAT (the Radio Access Technology of place network, wireless access technology) information, it so may result in eNodeB different from the RAT of the actual place networks of MSC/VLR for the target RAT that UE is selected, so that UE performs CSFB institutes
After the Target cell of 2G or 3G network, it can find that the Target cell is serviced by other MSC/VLR, and then must be registered to before circuit i or business is carried out by performing LAU (Location Area Update, location area updating) flow on the new MSC/VLR.The situation for being particularly called or exhaling eventually in UE, the MSC/VLR execution roamings that the new MSC/VRL that UE is re-registered needs and registered before retry flow to complete called flow.Above-mentioned extra location area updating flow and roaming retry flow and all can correspondingly increase the processing delay of whole CSFB flows, reduce service success rate and Consumer's Experience.The content of the invention
The embodiments of the invention provide a kind of Target Wireless access technology system of selection and relevant apparatus, to solve
When 2G and/or 3G hybrid networks PLMN marks are identical, the particular type of network where can not knowing the selected MSC/VLR of MME due to eNodeB, so that network where may being selected differently from MSC/VLR during execution circuit domain dropping is as objective network, cause the problem of extra location area updating flow of triggering execution and roaming retry flow.
The embodiment of the invention discloses a kind of system of selection of Target Wireless access technology, including：Evolution base station eNodeB receives the S1 Application Protocol S1-AP request messages that mobile management entity MME is sent, and knows circuit domain wireless access technology RAT information；ENodeB determines target RAT according to the circuit domain RAT information.
The embodiment of the invention also discloses a kind of evolution base station, including：Receiving unit, for receiving moving tube
The SI application protocol S1-AP request messages that entity MME is sent are managed, circuit domain RAT information is known；Selecting unit, for according to the circuit domain RAT information, determining target RAT.
A kind of communication system is also disclosed in the embodiment of the present invention, including：ENodeB and MME, wherein, the MME, for knowing circuit domain wireless access technology RAT information, S1 application protocol S1-AP request messages is sent to the eNodeB；The eNodeB, for receiving the S1 Application Protocol S1-AP request messages that the MME is sent, knows circuit domain wireless access technology RAT information, according to the circuit i or RAT information, determines target RAT.As can be seen from the above-described embodiment, MME knows circuit domain RAT information, by sending S1-AP request messages to eNodeB, so that eNodeB knows circuit domain RAT information according to S1-AP request messages, and target RAT is determined according to circuit domain RAT information so that UE can move to target RAT in CSFB flows, it is to avoid the extra LAU flows of triggering execution and roaming retry flow, the processing delay of CSFB flows is reduced, service success rate is improved.Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, cylinder will be made to the required accompanying drawing used in embodiment or description of the prior art below singly to introduce, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of flow chart of one embodiment of Target Wireless access technology system of selection of the invention；Fig. 2 is a kind of signaling process figure of another embodiment of Target Wireless access technology system of selection of the invention；
Fig. 3 is a kind of signaling process figure of another embodiment of Target Wireless access technology system of selection of the invention；
Fig. 4 is a kind of signaling process figure of another embodiment of Target Wireless access technology system of selection of the invention；
Fig. 5 is a kind of signaling process figure of another embodiment of Target Wireless access technology system of selection of the invention；
Fig. 6 is a kind of structure chart of one embodiment of evolution base station of the invention；
Fig. 7 is a kind of structure chart of another embodiment of evolution base station of the invention；
Fig. 8 is a kind of structure chart of one embodiment of communication system of the invention.Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.Embodiment one
Fig. 1 is referred to, it is a kind of flow chart of one embodiment of Target Wireless access technology system of selection of the invention, is comprised the following steps：
Step 101:Evolution base station eNodeB receives the S1 Application Protocol S1-AP request messages that mobile management entity MME is sent, and knows circuit domain wireless access technology RAT information；
Wherein, the circuit domain RAT information is specially the RAT information of network where the selected MSC/VLR of MME.
Wherein, the step can specifically include：ENodeB, which is received, includes circuit domain RAT types in the S1-AP request messages that MME is sent, the S1-AP request messages；ENodeB knows circuit domain RAT information according to the circuit domain RAT types；Or, eNodeB, which is received, includes location area LAI in the S1-AP request messages that MME is sent, the S1-AP request messages;ENodeB knows circuit domain RAT information according to the LAI；Or, eNodeB, which is received, includes wireless access technology/frequency priority in the S1-AP request messages that MME is sent, the S1-AP request messages（ RAT/Frequency Priority, RFSP );ENodeB knows circuit domain RAT information according to the RFSP.
For example, circuit domain RAT types are included in an independent parameter (RAT for CS Domain) in S1-AP request messages, after eNodeB receives S1-AP request messages, RAT types of the eNodeB in the independent parameter knows circuit domain RAT information.
For another example including LAI in S1-AP request messages, pass through LAI indicating circuits domain RAT information.Wherein, a kind of concrete mode is, LAI and RAT information mapping relations are locally configured in eNodeB, eNodeB knows RAT information corresponding with the LAI in S1-AP request messages according to LAI with the mapping relations of RAT information, and then knows circuit domain RAT information.Another specific mode is：LAI is included to some or the multiple bits in field（Bit) it is used to identify RAT information, eNodeB roots
Know circuit domain RAT information according to the bit.
For another example including RFSP in S1-AP request messages, pass through RFSP indicating circuits domain RAT information.Wherein, a kind of specific mode is that RAT information is included in RFSP cells, and eNodeB knows circuit domain RAT information according to the cell.Another specific mode is, RFSP and RAT information mapping relations are locally configured in eNodeB, eNodeB knows RAT information corresponding with the RFSP in S1-AP request messages according to RFSP with the mapping relations of RAT information, and then knows circuit domain RAT information.
In addition, MME can know circuit domain RAT information by different modes, and S1-AP request messages are sent to eNodeB.It is specifically as follows：When the mapping relations being locally configured in MME between the RAT information of mobile switching centre/network where visitor location register MSC/VLR and MSC/VLR, mapping relations of the MME according to where the MSC/VLR between the RAT information and MSC/VLR of network know RAT information corresponding with the MSC/VLR, so as to when knowing circuit domain RAT information, eNodeB receives the S1-AP request messages that MME is sent, and knows circuit domain RAT information；Or, circuit domain RAT information is included when MME is received in the location updating received message that MSC/VLR is sent, the location updating received message, so that when knowing circuit domain RAT information, eNodeB receives the S1-AP request messages that MME is sent, and knows circuit domain RAT information.
For example, when the mapping relations between the RAT information and MSC/VLR of network where MSC/VLR is locally configured in MME, MME knows RAT information corresponding with MSC/VLR according to the mapping relations being locally configured, so as to know circuit domain RAT information, then S1-AP request messages are sent to eNodeB.
For another example when MME is received and included circuit domain RAT information in the location updating received message of MSC/VLR transmissions, the location updating received message, MME is so as to know that circuit domain RAT information sends S1-AP request messages to eNodeB again.
Wherein, above-mentioned S1-AP request messages are specifically included：Initial context sets up request message, context modification request message or descending Non-Access Stratum transmission message.
Step 102：ENodeB determines target RAT according to the circuit domain RAT information.
Wherein, the step can specifically include：ENodeB determines the target RAT of packet switch switching according to the circuit domain RAT information;Or,
ENodeB determines the target RAT of Cell Change Order according to the circuit domain RAT information;Or, eNodeB determines wireless heterogeneous networks Connection Release and the target RAT of redirection according to the circuit domain RAT information.
For example, the circuit domain RAT information that eNodeB is known according to, determines target RAT.Wherein, a kind of specific mode is, the eNodeB selects the corresponding RAT of the circuit domain RAT information to be used as target RAT so that UE moves to the corresponding RAT of circuit domain RAT information described above in execution CSFB, it is to avoid the extra LAU flows of triggering and roaming retry flow.Wherein, according to the specific difference of CSFB flows, the step can specifically include：ENodeB determines the target RAT of packet switch switching according to the circuit domain RAT information;Or, eNodeB determines the target RAT of Cell Change Order according to the circuit domain RAT information;Or, eNodeB determines wireless heterogeneous networks Connection Release and the target RAT of redirection according to the circuit domain RAT information.
After target RAT is determined, eNodeB needs to notify the target RAT of determination to UE.Now, it is described according to circuit domain RAT information, target RAT is determined, is also included afterwards：ENodeB UE send RRC (Radio Resource Control, wireless heterogeneous networks）The target RAT is included in message, the RRC information.Wherein, specifically include：ENodeB sends to UE and the target RAT is included in switching command message, the switching command message;Or, eNodeB sends to UE and the target RAT is included in Cell Change Order message, the Cell Change Order message;Or, eNodeB sends to UE and the target RAT is included in RRC connection release message, the RRC connection release message.
For example, if UE and network side all support PS HO (PS Handover, packet-switched domain switching) flow, shellfish ' J eNodeB perform PS HO flows, and UE is moved into target RAT.Wherein, eNodeB sends to UE and target RAT is included in switching command (Handover Command) message, the switching command message.Such as, Mobility From EUTRA Command message is included in eNodeB sends switching command message to UE, the Mobility From EUTR A Command message is used to indicate that it is used to switch, while indicating target RAT type.
For another example if UE and network side all support CCO (Cell Change Order, Cell Change Order) flow, then eNodeB performs CCO flows, and UE is moved into target RAT.Wherein, eNodeB sends to UE and target RAT is included in Cell Change Order (Cell Change Order) message, the Cell Change Order message.Such as, eNodeB sends Mobility From EUTRA Command message to UE, and the Mobility From EUTRA Command message indicates that it is used for cell change, while indicating target RAT type.
If for another example UE and network side all support RRC Connection Releases and redirection（RRC connection release with redirection) journey, shellfish1J eNodeB perform RRC Connection Release journeys,
UE is moved into target RAT.Wherein, eNodeB sends the type that target RAT is indicated in RRC Connection Releases (RRC Connection Release) message, the RRC connection release message to UE.
It should be noted that according to the difference of network side and UE concrete abilities, any one mode in above-mentioned three kinds of modes can be used to complete CSFB processing, the embodiment of the present invention is not defined to this.
By above-described embodiment it can be seen that, MME knows circuit domain RAT information, by sending S1-AP request messages to eNodeB, so that eNodeB knows circuit domain RAT information according to S1-AP request messages, and target RAT is determined according to circuit domain RAT information, so that UE can move to network where the corresponding MSC/VLR of target RAT in CSFB flows, the extra LAU flows of triggering execution and roaming is avoided to retry flow, the processing delay of CSFB flows is reduced, service success rate is improved.Embodiment two
Fig. 2 is referred to, it is a kind of signaling process figure of one embodiment of Target Wireless access technology system of selection of the invention.The present embodiment initiates CSFB callings suitable for UE EPS networks（That is CSFB callers）Scene.This method specifically includes following steps：
Step 201：UE sends the service request of extension to MME（Extended Service Request) message, the service request information include CSFB indicate；
Step 202：MME sends the-AP request messages of S 1 to eNodeB, and circuit domain RAT information is indicated in-AP the request messages of S 1；
Wherein, when UE is in idle condition, the S1-AP request messages are that initial context sets up request (INITIAL CONTEXT SETUP REQUESE) message, when UE is in connection status, and the S1-AP request messages are that the father of UE contexts 4 changes request（UE CONTEXT MODIFICATION REQUEST) message.
In addition, how MME knows that the method for circuit domain RAT information is explained in embodiment one, therefore here is omitted.
Step 203:ENodeB knows circuit domain RAT information according to S1-AP request messages；
Wherein, how eNodeB knows that the method for circuit domain RAT information is explained in embodiment one according to S-AP request messages, therefore here is omitted.
Step 204:ENodeB sends S1-AP response messages to MME；
Step 205：ENodeB determines target RAT according to circuit domain RAT information;
It is preferred that, before eNodeB determines target RAT according to circuit domain RAT information, eNodeB earnestly asks measurement report to UE, and target RAT is determined according to the result and circuit domain RAT information of measurement report for eNodeB.
Wherein, eNodeB determines target RAT according to circuit domain RAT information, and-kind of a specific mode can be：The eNodeB selects the corresponding RAT of the circuit domain RAT information to be used as target RAT during CSFB.Wherein, according to the specific difference of CSFB flows, the step can specifically include：ENodeB determines the target RAT of packet switch switching according to the circuit domain RAT information;Or, eNodeB determines the target RAT of Cell Change Order according to the circuit domain RAT information;Or, eNodeB determines wireless heterogeneous networks Connection Release and the target RAT of redirection according to the circuit domain RAT information.
It should be noted that the embodiment of the present application does not limit the execution sequence between step 204 and step 205.
Step 206:Perform CSFB flows.
Wherein, eNodeB can perform the PS HO flows in step 206a, and UE is moved into target RAT, so as to complete CSFB flows.；Or, eNodeB can perform the CCO flows in step 206b, and UE is moved into target RAT, so as to complete CSFB flows.；Or, eNodeB can perform the RRC Connection Release flows in step 206c, and UE is moved into target RAT.
Wherein, if UE and network side all support PS HO flows, step 206a PS HO flows mainly include：
Step 206a- 1：Perform PS HO and prepare flow；
Step 206a-2:ENodeB sends to UE and target RAT is included in switching command message, the switching command message.
For example, including Mobility From EUTRA Command message in eNodeB sends switching command message to UE, the Mobility From EUTRA Command message is used to indicate that it is used to switch, while indicating target RAT type.
If UE and network side all support CCO flows, step 206b CCO flows mainly include：Step 206b-l:ENodeB sends to UE and target RAT is included in Cell Change Order message, the Cell Change Order message;
For example, eNodeB sends Mobility From EUTRA Command message to UE, the Mobility From EUTRA Command message indicates that it is used for cell change, while indicating target RAT
Type.
Step 206b-2:ENodeB sends UE context release requests to MME（UE Context Release Request) message.
If UE and network side neither support PS HO flows, CCO flows are not supported yet, or, network side is wished without using PS HO flows and CCO flows, or, UE and network side all support RRC Connection Release flows, then step 206c RRC Connection Release flows mainly include：
Step 206c- 1：ENodeB sends to UE and target RAT is included in RRC connection release message, the RRC connection release message;
For example, indicating target RAT type in RRC connection release message.
Step 206c-2:ENodeB sends UE context release requests to MME（ UE Context
Release Request) message.
By above-described embodiment it can be seen that, MME knows circuit domain RAT information, by sending S1-AP request messages to eNodeB, so that eNodeB knows circuit domain RAT information according to S1-AP request messages, and target RAT is determined according to circuit domain RAT information, so that UE can move to network where the corresponding MSC/VLR of target RAT in CSFB flows, the extra execution LAU flows of triggering and roaming is avoided to retry flow, the processing delay of CSFB flows is reduced, service success rate is improved.Embodiment three
Fig. 3 is referred to, it is a kind of signaling process figure of another embodiment of Target Wireless access technology system of selection of the invention, the present embodiment receives CSFB callings suitable for UE EPS networks（That is CSFB is called or CSFB is exhaled eventually）Scene.This method may comprise steps of：
Step 301:MSC/VLR receives audio call signaling, and beep-page message is sent to MME；Step 302:MME sends beep-page message to UE；
Specifically, when UE is in idle condition, then MME sends beep-page message to eNodeB, eNodeB sends beep-page message to UE；When UE is in connection status, then MME is to UE transtation mission circuits domain Service Notification message.
Step 303:UE sends the service request information of extension to MME, and the service request information is indicated comprising CSFB；
Step 304：MME sends the-AP request messages of S 1 to eNodeB, in-AP the request messages of S 1
Indicate circuit domain RAT information；
Wherein, when UE is in idle condition, the S1-AP request messages are that initial context sets up request message, and when UE is in connection status, the S1-AP request messages are UE context modification request message.
In addition, how MME knows that the method for circuit domain RAT information is explained in embodiment one, therefore here is omitted.
Step 305:ENodeB knows circuit domain RAT information according to S1-AP request messages；
Wherein, how eNodeB knows that the method for circuit domain RAT information is explained in embodiment one according to S-AP request messages, therefore here is omitted.
Step 306:ENodeB sends S1-AP response messages to MME；
Step 307:ENodeB determines target RAT according to circuit domain RAT information;
It is preferred that, before eNodeB determines target RAT according to circuit domain RAT information, eNodeB earnestly asks measurement report to UE, and target RAT is determined according to the result and circuit domain RAT information of measurement report for eNodeB.
Wherein, eNodeB determines target RAT according to circuit domain RAT information, and-kind of a specific mode can be：The eNodeB selects the corresponding RAT of the circuit domain RAT information to be used as the target RAT fallen back to during CSFB.Wherein, according to the specific difference of CSFB flows, the step can specifically include：ENodeB determines the target RAT of packet switch switching according to the circuit domain RAT information;Or, eNodeB determines the target RAT of Cell Change Order according to the circuit domain RAT information;Or, eNodeB determines wireless heterogeneous networks Connection Release and the target RAT of redirection according to the circuit domain RAT information.
It should be noted that the embodiment of the present application does not limit the execution sequence between step 306 and step 307.
Step 308:Perform CSFB flows.
Wherein, eNodeB can perform the PS HO flows in step 308a, and UE is moved into target RAT, so as to complete CSFB flows.Or, eNodeB can perform the CCO flows in step 308b, and UE is moved into target RAT, so as to complete CSFB flows.Or, eNodeB can perform the RRC Connection Release flows in step 308c, and UE is moved into target RAT.It implements process and explained in embodiment two, and correlated process can be found in the step 206 in embodiment two, therefore here is omitted.
By above-described embodiment it can be seen that, MME knows circuit domain RAT information, by sending S1-AP request messages to eNodeB, so that eNodeB knows circuit domain RAT information according to S1-AP request messages, target RAT is determined according to circuit domain RAT information, so that UE can move to network where the corresponding MSC/VLR of target in CSFB flows, the extra LAU flows of triggering and roaming is avoided to retry flow, the processing delay of CSFB flows is reduced, service success rate is improved.Example IV
Refer to Fig. 4, it is a kind of signaling process figure of another embodiment of Target Wireless access technology system of selection of the invention, from unlike above-described embodiment one and embodiment two, the scene of embodiment one and embodiment two suitable for providing circuit domain RAT information from MME to eNodeB calling procedure (corresponding to caller and called flow respectively), the present embodiment is after MME have selected MSC/VLR joint attachment/joint tracing section updating flow, the circuit domain RAT information where the MSC/VLR of selection is first supplied to eNodeB, so that in calling procedures of the eNodeB after selection target RAT scene.This method may comprise steps of：
Step 401：UE sends attach request to MME（Attach Request) message/tracing section updating request（TAU Request) message；
Wherein, the type of attachment of above-mentioned Attach Request message indicates that it is joint attach request（Combined EPS/IMSI attach Request), or, the updating type of above-mentioned tracing section updating request message indicates that it is the blunt track area/location of joint 3 and updates request (Combined Tracking Area/Location Area Update Request) or joint tracking area/location area updating, and IMSI International Mobile Subscriber Identity attach request (Combined Tracking Area/Location Area Update with IMSI attach Request).
Step 402:Perform EPS network attachments/tracing section updating flow；
For example, setting up default bearer etc. in attachment flow.
Step 403:MME goes to MSC/VLR position update flow, and MSC/VLR performs corresponding circuit domain location updating processing；
Wherein, MME selects suitable MSC/VLR, the PLMN where the above-mentioned selected MSC/VLR of MME can be different from the PLMN where MME according to information such as carrier policy.Wherein, MME can know circuit domain RAT information, and circuit domain RAT information is the information of MME RAT of network where UE selections MSC/VLR in this step 403.
In addition, how Μ Μ Ε know that the method for circuit domain RAT information is explained in embodiment one, therefore here is omitted.
Step 404:MME sends to eNodeB and circuit domain RAT information is included in S1-AP request messages, the S1-AP request messages；
Wherein, when UE is in idle condition, the S1-AP request messages are that initial context sets up request message, when UE is in connection status, and the S1-AP request messages are that descending Non-Access Stratum transmits (DOWNLINK NAS TRANSPORT) message.
In addition, the attachment that MME is sent to UE receives（Attach Accept) message/TAU receiving（TAU Accept) message can be encapsulated in the S1-AP request messages.
Step 405:ENodeB sends RRC request messages to UE；
Reconfigured for example, the RRC request messages are RRC connections（RRC Connenction Reconfiguration) message.
Wherein, UE attachment received message/TAU received messages can also be sent in the RRC request messages comprising MME.
Step 406：UE sends RRC to eNodeB and confirms completion message；
Step 407:ENodeB knows circuit domain RAT information according to S1-AP request messages；
Wherein, how eNodeB knows that the method for circuit domain RAT information is explained in embodiment one according to S-AP request messages, therefore here is omitted.
Step 408:ENodeB sends S1-AP response messages to MME, completes joint attachment/joint tracing section updating flow；
Step 409:After attachment flow or tracing section updating flow has been performed, calling procedure is performed.Wherein, the calling procedure includes calling procedure and called flow, specifically includes following steps：Step 409a:ENodeB determines target RAT according to circuit domain RAT information;
For example, eNodeB selects RAT corresponding with circuit domain RAT information to be used as target RAT.Wherein, according to the specific difference of CSFB flows, the step can specifically include：ENodeB determines the target RAT of packet switch switching according to the circuit domain RAT information;Or, eNodeB determines the target RAT of Cell Change Order according to the circuit domain RAT information;Or, eNodeB determines wireless heterogeneous networks Connection Release and the target RAT of redirection according to the circuit domain RAT information.
Step 409b:ENodeB sends RRC information to UE, and the RRC information includes target RAT.
Wherein, if UE and network side all support PS HO flows, eNodeB sends to UE and target RAT is included in switching command message, the switching command message;If UE and network side all support CCO flows, eNodeB sends in cell change message, the cell change message to UE and includes target RAT;If UE and network side neither support PS HO flows, CCO flows are not supported yet, or, network side is wished without using PS HO flows and CCO flows, or, UE and network side all support RRC Connection Release flows, shellfish ' J eNodeB send to UE and target RAT is included in RRC connection release message, the RRC connection release message.
As can be seen from the above-described embodiment, MME knows circuit domain RAT information, by sending S1-AP request messages to eNodeB, so that eNodeB knows circuit domain RAT information according to S1-AP request messages, and target RAT is determined according to circuit domain RAT information, so that UE can move to network where the corresponding MSC/VLR of target RAT in CSFB flows, the extra LAU flows of triggering and roaming is avoided to retry flow, the processing delay of CSFB flows is reduced, service success rate is improved.Embodiment five
Refer to Fig. 5, it is a kind of signaling process figure of another embodiment of Target Wireless access technology system of selection of the application, from unlike above-described embodiment one and embodiment two, the scene of embodiment one and embodiment two suitable for providing circuit domain RAT information from MME to eNodeB calling procedure (corresponding to caller and called flow respectively), the present embodiment is applied to before a call, and circuit domain RAT information is supplied into eNodeB in service request procedure by MME so that the scene of calling procedure selection target cells of the eNodeB after.This method may comprise steps of：
Step 501：UE sends service request to MME（Service Request) message；
Step 502：MME sends the-AP request messages of S 1 to eNodeB, and circuit domain RAT information is indicated in-AP the request messages of S 1；
For example ,-AP the request messages of S 1, which are initial context, sets up request message.
MME can know circuit domain RAT information, and circuit domain RAT information is the RAT of network where MME selects MSC/VLR for UE information.
In addition, how MME knows that the method for circuit domain RAT information is explained in embodiment one, therefore here is omitted.
Step 503:ENodeB knows circuit domain RAT information according to S1-AP request messages；
Wherein, how eNodeB knows that the method for circuit domain RAT information is explained in embodiment one according to S-AP request messages, therefore here is omitted.
Step 504:ENodeB sends S1-AP response messages to MME, completes joint attachment/joint tracing section updating flow；
For example ,-AP the response messages of S 1, which are initial context, sets up completion（ INITIAL CONTEXT
SETUP COMPLETE) message.
Step 505:After attachment flow or tracing section updating flow has been performed, calling procedure is performed.Wherein, the calling procedure includes calling procedure and called flow, specifically includes following steps：Step 505a:ENodeB determines target RAT according to circuit domain RAT information;
For example, eNodeB selects RAT corresponding with circuit domain RAT information to be used as target RAT.Wherein, according to the specific difference of CSFB flows, the step can specifically include：ENodeB determines the target RAT of packet switch switching according to the circuit domain RAT information;Or, eNodeB determines the target RAT of Cell Change Order according to the circuit domain RAT information;Or, eNodeB determines wireless heterogeneous networks Connection Release and the target RAT of redirection according to the circuit domain RAT information.
Step 505b：ENodeB sends to UE and target RAT is included in RRC information, the RRC information.Wherein, if UE and network side all support PS HO flows, eNodeB sends to UE and target RAT is included in switching command message, the switching command message;If UE and network side all support CCO flows, eNodeB sends in cell change message, the cell change message to UE and includes target RAT;If UE and network side neither support PS HO flows, CCO flows are not supported yet, or, network side is wished without using PS HO flows and CCO flows, or, UE and network side all support RRC Connection Release flows, shellfish ' J eNodeB send to UE and target RAT is included in RRC connection release message, the RRC connection release message.
As can be seen from the above-described embodiment, MME knows circuit domain RAT information, by sending S1-AP request messages to eNodeB, so that eNodeB knows circuit domain RAT information according to S1-AP request messages, and target RAT is determined according to circuit domain RAT information, so that UE can move to network where the corresponding MSC/VLR of target RAT in CSFB flows, the extra LAU flows of triggering and roaming is avoided to retry flow, the processing delay of CSFB flows is reduced, service success rate is improved.Embodiment six
Corresponding with a kind of Target Wireless access technology system of selection in above-described embodiment one, the embodiment of the present invention additionally provides the device related to the selection of Target Wireless access technology.Referring to Fig. 6, it is a kind of one embodiment structure chart of evolution base station of the invention, the device includes receiving unit 601 and selecting unit 602.Its internal structure and annexation are further described with reference to the operation principle of the device.
Receiving unit 601, the S1-AP request messages for receiving mobile management entity MME transmission, knows circuit domain RAT information；
Selecting unit 602, for according to the circuit domain RAT information, determining target RAT.
It is preferred that, receiving unit 601 further comprises：First receiving subelement 6011 and first knows subelement 6012,
Circuit domain RAT types are included in first receiving subelement 6011, the S1-AP request messages for receiving MME transmissions, the S1-AP request messages；
First knows subelement 6012, for knowing circuit domain RAT information according to the circuit domain RAT types.
Interchangeable, the first receiving subelement 6011 is replaced by the second receiving subelement, and first knows that subelement 6012 knows that subelement is replaced by second, i.e. receiving unit 601 further comprises：Second receiving subelement and the second greenbrier know subelement,
Location area LAI is included in second receiving subelement, the S1-AP request messages for receiving MME transmissions, the S1-AP request messages;
Second knows subelement, for knowing circuit domain RAT information according to the LAI；
Interchangeable, the first receiving subelement 6011 is replaced by the 3rd receiving subelement, and first knows that subelement 6012 knows that subelement is replaced by the 3rd, i.e. receiving unit 601 further comprises：3rd receiving subelement and the 3rd greenbrier know subelement,
RFSP is included in 3rd receiving subelement, the S1-AP request messages for receiving MME transmissions, the S1-AP request messages;
3rd knows subelement, for knowing circuit domain RAT information according to the RFSP.
Further, second knows that subelement includes：
Mapping relations know subelement, for when LAI and the mapping relations of RAT information is locally configured in eNodeB, RAT information corresponding with the LAI being known with the mapping relations of RAT information according to the LAI, so as to know circuit domain RAT information；
Or,
Subelement is known in carrying, for when including RAT information in the LAI, circuit domain RAT information to be known according to the RAT information included in the LAI.
Fig. 7 is referred to, it is a kind of structure chart of another embodiment of evolution base station of the invention.As shown in Fig. 7, the evolution base station is in addition to including receiving unit 601 and selecting unit 602, in addition to transmitting element 603, and the target RAT is included in radio resource control RRC message, the RRC information for being sent to UE.
It is preferred that, transmitting element 603 includes：
First transmission sub-unit, the target RAT is included for being sent to UE in switching command message, the switching command message;
Or,
Second transmission sub-unit, the target RAT is included for being sent to UE in Cell Change Order message, the Cell Change Order message;
Or,
3rd transmission sub-unit, target RAT is stated for sending to include in RRC connection release message, the RRC connection release message to UE.
It should be noted that above-mentioned S1-AP request messages are specifically included：Initial context sets up request message, context modification request message or descending Non-Access Stratum transmission message.
As can be seen from the above-described embodiment, MME knows circuit domain RAT information, by sending S1-AP request messages to eNodeB, so that eNodeB knows circuit domain RAT information according to S1-AP request messages, and target RAT is determined according to circuit domain RAT information so that UE can move to target RAT in CSFB flows, it is to avoid the extra LAU flows of triggering and roaming retry flow, the processing delay of CSFB flows is reduced, service success rate is improved.Embodiment seven
Corresponding with a kind of Target Wireless access technology system of selection in above-described embodiment one, the embodiment of the present invention additionally provides a kind of communication system.Referring to Fig. 8, it is a kind of one embodiment structure chart of communication system of the invention, the communication system includes MME801 and eNodeB units 802.Its internal structure and annexation are further described with reference to the operation principle of the device.
MME 801, for knowing circuit domain wireless access technology RAT information ,-AP the request messages of 1 application protocol S of S 1 are sent to eNodeB 802；
ENodeB 802, the S1 Application Protocol S1-AP request messages for receiving the transmissions of MME 801, knows circuit domain wireless access technology RAT information, according to the circuit domain RAT information, determines target RAT.
It is preferred that, MME801 further comprises：
First knows subelement, for when the mapping relations being locally configured in MME between the RAT information of mobile switching centre/network where visitor location register MSC/VLR and MSC/VLR, mapping relations according to where the MSC/VLR between the RAT information and MSC/VLR of network know RAT information corresponding with the MSC/VLR, so as to know circuit domain RAT information；
Or,
Second knows subelement, the location updating received message for receiving MSC/VLR transmissions, circuit domain RAT information is included in the location updating received message, so as to know circuit domain RAT information.
It can be seen that by above-mentioned implementation, MME knows circuit domain RAT information, by sending S1-AP request messages to eNodeB, so that eNodeB knows circuit domain RAT information according to S1-AP request messages, and target RAT is determined according to circuit domain RAT information so that UE can move to target RAT in CSFB flows, it is to avoid the extra LAU flows of triggering and roaming retry flow, the processing delay of CSFB flows is reduced, service success rate is improved.
It should be noted that, one of ordinary skill in the art will appreciate that realizing all or part of flow in above-described embodiment method, computer program is can be by instruct the hardware of correlation to complete, described program can be stored in a computer read/write memory medium, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic disc, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access Memory, RAM) etc..
The explanation for having carried out upper embodiment in detail to Target Wireless access technology system of selection provided by the present invention and relevant apparatus above is only intended to the method and its core concept for helping to understand the present invention；Simultaneously for those of ordinary skill in the art, according to the thought of the present invention, it will change in specific embodiments and applications, in summary, this specification content should not be construed as limiting the invention.
Claims (1)
- Claim1st, a kind of system of selection of Target Wireless access technology, it is characterised in that including：Evolution base station eNodeB receives the S1 Application Protocol S1-AP request messages that mobile management entity MME is sent, and knows circuit domain wireless access technology RAT information；ENodeB determines target RAT according to the circuit domain RAT information.2nd, according to the method described in claim 1, it is characterised in that the eNodeB receives the-AP request messages of S 1 that MME is sent, and knows circuit domain RAT information, specifically includes：ENodeB, which is received, includes circuit domain RAT types in the S1-AP request messages that MME is sent, the S1-AP request messages；ENodeB knows circuit domain RAT information according to the circuit domain RAT types；Or,ENodeB, which is received, includes location area LAI in the S1-AP request messages that MME is sent, the S1-AP request messages;ENodeB knows circuit domain RAT information according to the LAI；Or,ENodeB, which is received, includes wireless access technology/frequency priority RFSP in the S1-AP request messages that MME is sent, the S1-AP request messages;ENodeB knows circuit domain RAT information according to the RFSP.3rd, method according to claim 2, it is characterised in that the eNodeB knows that circuit domain RAT information is specifically included according to the LAI：When LAI and the mapping relations of RAT information is locally configured in eNodeB, eNodeB is just blunt to know RAT information corresponding with the LAI according to the LAI with the mapping relations of RAT information, so as to know circuit domain RAT information；Or,When including RAT information in the LAI, eNodeB knows circuit domain RAT information according to the RAT information included in the LAI.4th, method according to claim 2, it is characterised in that the eNodeB knows that circuit domain RAT information is specifically included according to the RFSP：RAT information is included in the RFSP, eNodeB is according to the RAT information included in the RFSP Know circuit domain RAT information；Or,When the mapping relations of RFSP and RAT information are locally configured in eNodeB, eNodeB knows the corresponding RAT information of the RFSP according to the RFSP and the mapping relations of RAT information, so as to know circuit domain RAT information.5th, according to the method described in claim 1, it is characterised in that the eNodeB receives the-AP request messages of S 1 that MME is sent, and knows circuit domain RAT information, specifically includes：When the mapping relations being locally configured in MME between the RAT information of mobile switching centre/network where visitor location register MSC/VLR and MSC/VLR, mapping relations of the MME according to where the MSC/VLR between the RAT information and MSC/VLR of network know RAT information corresponding with the MSC/VLR, so as to when knowing circuit domain RAT information, eNodeB receives the S1-AP request messages that MME is sent, and knows circuit domain RAT information；Or,When MME receives the location updating received message that MSC/VLR is sent, circuit domain RAT information is included in the location updating received message, so as to which when knowing circuit domain RAT information, eNodeB receives the S1-AP request messages that MME is sent, and knows circuit domain RAT information.6th, according to the method described in claim 1, it is characterised in that the eNodeB determines target RAT, specifically included according to circuit domain RAT information：ENodeB determines the target RAT of packet switch switching according to the circuit domain RAT information;Or, eNodeB determines the target RAT of Cell Change Order according to the circuit domain RAT information;Or, eNodeB determines wireless heterogeneous networks Connection Release and the target RAT of redirection according to the circuit domain RAT information.7th, according to the method described in claim 1, it is characterised in that the eNodeB is according to circuit domain RAT information, after determining target RAT, in addition to：ENodeB is sent in radio resource control RRC message, the RRC information comprising described to UE3 mark RAT.8th, method according to claim 6, it is characterised in that the eNodeB sends in RRC information, the RRC information to UE and specifically included comprising target RAT：ENodeB sends to UE and the target is included in switching command message, the switching command message RAT;Or,ENodeB sends to UE and the target RAT is included in Cell Change Order message, the Cell Change Order message;Or,ENodeB sends to include in RRC connection release message, the RRC connection release message to UE states target RAT.9th, the method described in any one in claim 1-8, it is characterised in that the S1-AP request messages are specifically included：Initial context sets up request message, context modification request message or descending Non-Access Stratum transmission message.10th, a kind of evolution base station, it is characterised in that including：Receiving unit, the S1 Application Protocol S1-AP request messages for receiving mobile management entity MME transmission, knows circuit domain RAT information；Selecting unit, for according to the circuit domain RAT information, determining target RAT.11st, evolution base station according to claim 10, it is characterised in that the receiving unit includes：Circuit domain RAT types are included in first receiving subelement, the S1-AP request messages for receiving MME transmissions, the S1-AP request messages；First knows subelement, for knowing circuit domain RAT information according to the circuit domain RAT types；Or,Location area LAI is included in second receiving subelement, the S1-AP request messages for receiving MME transmissions, the S1-AP request messages;Second knows subelement, for knowing circuit domain RAT information according to the LAI；Or,RFSP is included in 3rd receiving subelement, the S1-AP request messages for receiving MME transmissions, the S1-AP request messages;3rd knows subelement, for knowing circuit domain RAT information according to the RFSP.12nd, evolution base station according to claim 11, it is characterised in that described second knows that subelement includes： Mapping relations know subelement, for when LAI and the mapping relations of RAT information is locally configured in eNodeB, RAT information corresponding with the LAI being known with the mapping relations of RAT information according to the LAI, so as to know circuit domain RAT information；Or,Subelement is known in carrying, for when including RAT information in the LAI, circuit domain RAT information to be known according to the RAT information included in the LAI.13rd, evolution base station according to claim 10, it is characterised in that also include：Transmitting element, the target RAT is included for being sent to UE in radio resource control RRC message, the RRC information.14th, evolution base station according to claim 13, it is characterised in that the transmitting element includes：First transmission sub-unit, the target RAT is included for being sent to UE in switching command message, the switching command message;Or,Second transmission sub-unit, the target RAT is included for being sent to UE in Cell Change Order message, the Cell Change Order message;Or,3rd transmission sub-unit, target RAT is stated for sending to include in RRC connection release message, the RRC connection release message to UE.15th, the evolution base station described in any one in claim 10-14, it is characterised in that the S1-AP request messages are specifically included：Initial context sets up request message, context modification request message or descending Non-Access Stratum transmission message.16th, a kind of communication system, it is characterised in that including：Evolution base station eNodeB and mobility management entity MME, wherein,The MME, for knowing circuit domain wireless access technology RAT information, S1 Application Protocol S1-AP request messages are sent to the eNodeB；The eNodeB, for receiving the S1 Application Protocol S1-AP request messages that the MME is sent, knows circuit domain wireless access technology RAT information, according to the circuit domain RAT information, determines target RAT.17th, mobile management entity according to claim 16, it is characterised in that the MME bags Include：First knows subelement, for when the mapping relations being locally configured in MME between the RAT information of mobile switching centre/network where visitor location register MSC/VLR and MSC/VLR, mapping relations according to where the MSC/VLR between the RAT information and MSC/VLR of network know RAT information corresponding with the MSC/VLR, so as to know circuit domain RAT information；Or,Second knows subelement, the location updating received message for receiving MSC/VLR transmissions, circuit domain RAT information is included in the location updating received message, so as to know circuit domain RAT information.
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| CN107734541B (en) * | 2017-11-30 | 2021-02-02 | Oppo广东移动通信有限公司 | Method and device for detecting cell switching result and computer storage medium |
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