CN103200636A - Multi-mode mobile terminal and network switching method - Google Patents
Multi-mode mobile terminal and network switching method Download PDFInfo
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Abstract
The invention provides a network switching method and a multi-mode mobile terminal, wherein the multi-mode mobile terminal comprises the following steps: the multimode mobile terminal carries out data interaction with the outside through the first communication module and/or the second communication module; the multimode controller is used for sending a data connection suspension request to the first communication module when detecting that a communication network needs to be switched, acquiring information of a data service which is performed by the first communication module, transmitting the information of the data service to the second communication module, and controlling the first communication module to suspend the data service when the second communication module starts to perform the data service; the second communication module is also used for establishing data connection with the outside according to the information of the data service and starting the data service from the switching point. By the technical scheme, the problem of data service interruption caused by the fact that the terminal cannot realize the packet service mutual switching is avoided, the data service smooth switching is realized, and the user waiting time is reduced.
Description
Technical field
The present invention relates to the mobile communication technology field, in particular to a kind of multi-module mobile terminal and a kind of method for switching network.
Background technology
The existing LTE(Long Term Evolution that supports, Long Term Evolution) and CDMA(Code Division Multiple Access, code division multiple access) 1X/EVDO multimode terminal, generally all adopted LTE module, CDMA module to add the design of AP, realize the 4G/3G high-speed data service, satisfied user's request.The layout strategy of such terminal data business is: when terminal is under the LTE network coverage, and endpoint registration LTE network, and hang up the 1X/EVDO Packet data service of CDMA.When terminal had been left the LTE network, automatic disconnection LTE connected, and terminal begins to rebulid the 1X/EVDO Packet data service.
Because LTE belongs to different networks respectively with CDMA, existing LTE and CDMA multimode terminal can't be supported the taking over seamlessly of high speed packet service of LTE and CDMA, so when 4G and 3G network switch instances occurring, data service can't realize continuity.Introduced eHRPD(evolved High Rate Packet Data, the high-speed packet network of evolution in order to address this problem network side) core component, and end side does not have the eHRPD module corresponding with network side.
Therefore, need a kind of new network handoff technique, can solve 4G(the 4th third-generation mobile communication) network and 3G(3G (Third Generation) Moblie) when switching between the network, the problem that data service can't be continuous, thus realize taking over seamlessly of high speed packet service between 4G network and the 3G network.
Summary of the invention
The present invention just is being based on the problems referred to above, has proposed a kind of new network handoff technique, can solve when switching between the heterogeneous networks, and the problem that data service can't be continuous, thus high speed packet service takes over seamlessly between the realization heterogeneous networks.
In view of this, the present invention proposes a kind of multi-module mobile terminal, comprising: first communication module and second communication module, described multi-module mobile terminal carries out data interaction by described first communication module and/or described second communication module and outside; Multi-mode controller, when detecting need switching communication network, send data to described first communication module and connect the request of hang-up, obtain the information of the data service of being undertaken by described first communication module, and the information of described data service transferred to described second communication module, and when described second communication module begins to carry out described data service, control described first communication module and hang up described data service; Described second communication module also is used for being connected with the data of described outside according to the information foundation of described data service, and begins to carry out described data service from switching point.
In this technical scheme, when multi-module mobile terminal need carry out the network switching, obtain the information of the data service in the current communication module of carrying out data service by multi-mode controller, and rebulid the data service of other communication modules, this data traffic information is sent to other communication modules, according to data traffic information, proceed data service from switching point by other communication modules.Like this, avoided switching the problem of the data service interruption that causes mutually because terminal can't realize Packet Service, thereby realized taking over seamlessly of data service, reduced user's stand-by period, promoted user's experience.
In technique scheme, preferably, described multi-mode controller also is used for when described second communication module is not successfully set up described data service, notifies described first communication module to recover the described data service that is suspended.
In technique scheme, preferably, described multi-mode controller also is used for when detecting need switching communication network, switch to by first communication module and set up when being connected with the data of described outside, obtain the information of the data service of being undertaken by described second communication module, and the information of described data service is transferred to described first communication module; Described first communication module also is used for being connected with the data of described outside in the information foundation according to described data service, and begins to carry out described data service from switching point.
In this technical scheme, can guarantee two-way the taking over seamlessly between communication module in the multi-module mobile terminal, avoided switching the problem of the data service interruption that causes mutually because terminal can't realize Packet Service, thereby reduced user's stand-by period, promoted user's experience.
In technique scheme, preferably, described multi-mode controller also is used for receiving the data service request from application layer, according to default communication pattern, described data service request is sent to any one communication module in described first communication module and the described second communication module, to carry out network registry, when receiving the network registry failed message of described any one communication module, described data service request is sent to another communication module carries out network registry, to finish the corresponding data business.
The startup flow process of multimode terminal has been described in this technical scheme, user or manufacturer can preset the priority of the network connection of communication pattern in the multi-module mobile terminal and communication module, communication pattern in multi-module mobile terminal is set under the situation of multimode, according to the setting of user to network connection, start the highest communication module of priority and carry out network registry, the network registry success, then directly use this communication module to carry out data service, the network registry failure then starts other communication modules and carries out network registry.Like this, data connection stability and high-quality in the terminal have been guaranteed.
In technique scheme, preferably, also comprise: first interface is used for connecting described multi-mode controller and described first communication module, with information and/or the described data service request of transmitting described data service; Second interface is used for connecting described multi-mode controller and described second communication module, with information and/or the described data service request of transmitting described data service.
In this technical scheme, realize the information of data service and the transmission of data service request by communication interface between multi-mode controller and the communication module, thereby guarantee carrying out smoothly of seamless Packet data service.
In technique scheme, preferably, the information of described data service comprises data service switching point information, IP address and/or domain name server information.
In this technical scheme, in order to guarantee the seamless switching between communication module, need be by communication interface with relevant informations such as data service switching point information, IP address and/or domain name server informations, transfer to from the communication module of turn-off data business and will set up the communication module that data service connects, like this, newly set up the communication module of data service connection and will then carry out data service from switching point according to these relevant informations, guaranteed the uninterrupted of data service, thereby make the interruption of the imperceptible data service of user, promoted user's experience.
In technique scheme, preferably, the communication network standard of described first communication module comprises the 3G (Third Generation) Moblie network, and the communication network standard of described second communication module comprises the 4th third generation mobile communication network; The communication network standard of described second communication module comprises the 3G (Third Generation) Moblie network, and the communication network standard of described first communication module comprises the 4th third generation mobile communication network.
Network between communication module switches the switching that comprises between 3G (Third Generation) Moblie network and the 4th third generation mobile communication network, namely can realize two-way seamless switching between 3G (Third Generation) Moblie network and the 4th third generation mobile communication network by this programme, suitable equally when other more senior networks occurring.
According to another aspect of the invention, a kind of method for switching network also, comprise: when detecting need switching communication network, send data to first communication module and connect the request of hang-up, obtain the information of the data service of being undertaken by described first communication module, and the information of described data service is transferred to second communication module; Described second communication module is set up according to the information of described data service and is connected with the data of described outside, and begins to carry out described data service from switching point; Hang up the described data service that described first communication module carries out.
In this technical scheme, when multi-module mobile terminal need carry out the network switching, obtain the information of the data service in the current communication module of carrying out data service by multi-mode controller, and rebulid the data service of other communication modules, this data traffic information is sent to other communication modules, according to data traffic information, proceed data service from switching point by other communication modules.Like this, avoided switching the problem of the data service interruption that causes mutually because terminal can't realize Packet Service, thereby realized taking over seamlessly of data service, reduced user's stand-by period, promoted user's experience.
In technique scheme, preferably, when described second communication module is not successfully set up described data service, notify described first communication module to recover the described data service that is suspended.
In technique scheme, preferably, detecting when need switching communication network, obtain the information of the data service of being undertaken by described second communication module, and the information of described data service is transferred to described first communication module; Be connected with the data of described outside in the information foundation of the described first communication mould according to described data service, and begin to carry out described data service from switching point.
In this technical scheme, can guarantee two-way the taking over seamlessly between communication module in the multi-module mobile terminal, avoided switching the problem of the data service interruption that causes mutually because terminal can't realize Packet Service, thereby reduced user's stand-by period, promoted user's experience.
In technique scheme, preferably, receive the data service request from application layer, according to default communication pattern, described data service request is sent to any one communication module in described first communication module and the described second communication module, to carry out network registry; When receiving the network registry failed message of described any one communication module, described data service request is sent to another communication module carries out network registry, to finish the corresponding data business.
In this technical scheme, user or manufacturer can preset the priority of the network connection of communication pattern in the multi-module mobile terminal and communication module, communication pattern in multi-module mobile terminal is set under the situation of multimode, according to the setting of user to network connection, start the highest communication module of priority and carry out network registry, the network registry success then directly uses this communication module to carry out data service, the network registry failure then starts other communication modules and carries out network registry.Like this, data connection stability and high-quality in the terminal have been guaranteed.
In technique scheme, preferably, the information of described data service comprises data service switching point information, IP address and/or domain name server information.
In this technical scheme, in order to guarantee the seamless switching between communication module, need be by communication interface with relevant informations such as data service switching point information, IP address and/or domain name server informations, transfer to from the communication module of turn-off data business and will set up the communication module that data service connects, like this, newly set up the communication module of data service connection and will then carry out data service from switching point according to these relevant informations, guaranteed the uninterrupted of data service, thereby make the interruption of the imperceptible data service of user, promoted user's experience.
In technique scheme, preferably, the communication network standard of described first communication module comprises the 3G (Third Generation) Moblie network, and the communication network standard of described second communication module comprises the 4th third generation mobile communication network; The communication network standard of described second communication module comprises the 3G (Third Generation) Moblie network, and the communication network standard of described first communication module comprises the 4th third generation mobile communication network.
Network between communication module switches the switching that comprises between 3G (Third Generation) Moblie network and the 4th third generation mobile communication network, namely can realize two-way seamless switching between 3G (Third Generation) Moblie network and the 4th third generation mobile communication network by this programme.
By above technical scheme, solved when switching between 4G network and the 3G network, the problem that data service can't be continuous, thus realized taking over seamlessly of high speed packet service between 4G network and the 3G network.
Description of drawings
Fig. 1 shows the block diagram of multi-module mobile terminal according to an embodiment of the invention;
Fig. 2 shows the flow chart of method for switching network according to an embodiment of the invention;
Fig. 3 shows the structure chart of multi-module mobile terminal according to an embodiment of the invention;
Fig. 4 shows the concrete structure figure of multi-module mobile terminal according to an embodiment of the invention;
Fig. 5 shows the particular flow sheet of method for switching network according to an embodiment of the invention;
Fig. 6 shows according to an embodiment of the invention the CDMA pattern and selects flow chart automatically;
Fig. 7 shows the flow chart that switches to the method for switching network of CDMA according to an embodiment of the invention from LTE;
Fig. 8 shows the flow chart that CDMA according to an embodiment of the invention switches to the method for switching network of LTE.
Embodiment
In order more to be expressly understood above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments the present invention is further described in detail.Need to prove that under the situation of not conflicting, the application's embodiment and the feature among the embodiment can make up mutually.
A lot of details have been set forth in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not subjected to the restriction of following public specific embodiment.
Fig. 1 shows the block diagram of multi-module mobile terminal according to an embodiment of the invention.
As shown in Figure 1, multi-module mobile terminal 100 comprises according to an embodiment of the invention: first communication module 102 and second communication module 104, and described multi-module mobile terminal carries out data interaction by described first communication module and/or described second communication module and outside; Multi-mode controller 106, when detecting need switching communication network, send data to described first communication module 102 and connect the request of hang-up, obtain the information of the data service of being undertaken by described first communication module 102, and the information of described data service transferred to described second communication module 104, and when second communication module 104 began to carry out data service, control first communication module 102 was hung up described data service; Described second communication module 104 also is used for being connected with the data of described outside according to the information foundation of described data service, and begins to carry out described data service from switching point.
In this technical scheme, when multi-module mobile terminal need carry out the network switching, obtain the information of the data service in the current communication module of carrying out data service by multi-mode controller, and rebulid the data service of other communication modules, this data traffic information is sent to other communication modules, according to data traffic information, proceed data service from switching point by other communication modules.Like this, avoided switching the problem of the data service interruption that causes mutually because terminal can't realize Packet Service, thereby realized taking over seamlessly of data service, reduced user's stand-by period, promoted user's experience.
In technique scheme, preferably, described multi-mode controller 106 also is used for when detecting need switching communication network, switch to by first communication module 102 and set up when being connected with the data of described outside, obtain the information of the data service of being undertaken by described second communication module 104, and the information of described data service is transferred to described first communication module 102; Described first communication module 102 also is used for being connected with the data of described outside in the information foundation according to described data service, and begins to carry out described data service from switching point.
In this technical scheme, can guarantee two-way the taking over seamlessly between communication module in the multi-module mobile terminal, avoided switching the problem of the data service interruption that causes mutually because terminal can't realize Packet Service, thereby reduced user's stand-by period, promoted user's experience.
In technique scheme, preferably, described multi-mode controller 106 also is used for receiving the data service request from application layer, according to default communication pattern, described data service request is sent to any one communication module in described first communication module 102 and the described second communication module 104, to carry out network registry, when receiving the network registry failed message of described any one communication module, described data service request is sent to another communication module carries out network registry, to finish the corresponding data business.
In this technical scheme, user or manufacturer can preset the priority of the network connection of communication pattern in the multi-module mobile terminal and communication module, communication pattern in multi-module mobile terminal is set under the situation of multimode, according to the setting of user to network connection, start the highest communication module of priority and carry out network registry, the network registry success then directly uses this communication module to carry out data service, the network registry failure then starts other communication modules and carries out network registry.Like this, data connection stability and high-quality in the terminal have been guaranteed.
In technique scheme, preferably, also comprise: first interface 108 is used for connecting described multi-mode controller 106 and described first communication module 102, with information and/or the described data service request of transmitting described data service; Second interface 110 is used for connecting described multi-mode controller 106 and described second communication module 104, with information and/or the described data service request of transmitting described data service.
In this technical scheme, realize the information of data service and the transmission of data service request by communication interface between multi-mode controller and the communication module, thereby guarantee carrying out smoothly of seamless Packet data service.
In technique scheme, preferably, the information of described data service comprises data service switching point information, IP address and/or domain name server information.
In this technical scheme, in order to guarantee the seamless switching between communication module, need be by communication interface with relevant informations such as data service switching point information, IP address and/or domain name server informations, transfer to from the communication module of turn-off data business and will set up the communication module that data service connects, like this, newly set up the communication module of data service connection and will then carry out data service from switching point according to these relevant informations, guaranteed the uninterrupted of data service, thereby make the interruption of the imperceptible data service of user, promoted user's experience.For example carry out the download of certain article by the LTE network, when downloading to chapter 3, need the LTE network is switched to cdma network, can be with the IP address of download address, current terminal, need down information such as chapter 4 to be sent to the cdma communication module, the cdma communication module is set up the data connection and is proceeded data service according to these information, thereby has guaranteed the continuity of data service.
In technique scheme, preferably, the communication network standard of described first communication module 102 comprises the 3G (Third Generation) Moblie network, and the communication network standard of described second communication module 104 comprises the 4th third generation mobile communication network; The communication network standard of described second communication module 104 comprises the 3G (Third Generation) Moblie network, and the communication network standard of described first communication module 102 comprises the 4th third generation mobile communication network.
Network between communication module switches the switching that comprises between 3G (Third Generation) Moblie network and the 4th third generation mobile communication network, namely can realize two-way seamless switching between 3G (Third Generation) Moblie network and the 4th third generation mobile communication network by this programme, suitable equally when other more senior networks occurring.
Fig. 2 shows the flow chart of method for switching network according to an embodiment of the invention.
As shown in Figure 2, method for switching network according to an embodiment of the invention, comprise: step 202, when detecting need switching communication network, send data to first communication module and connect the request of hang-up, obtain the information of the data service of being undertaken by first communication module, and the information of described data service is transferred to second communication module; Step 204, described second communication module are set up according to the information of described data service and are connected with the data of described outside, and begin to carry out described data service from switching point; Step 206 is hung up the described data service that described first communication module carries out.
In this technical scheme, when multi-module mobile terminal need carry out the network switching, obtain the information of the data service in the current communication module of carrying out data service by multi-mode controller, and rebulid the data service of other communication modules, this data traffic information is sent to other communication modules, according to data traffic information, proceed data service from switching point by other communication modules.Like this, avoided switching the problem of the data service interruption that causes mutually because terminal can't realize Packet Service, thereby realized taking over seamlessly of data service, reduced user's stand-by period, promoted user's experience.
In technique scheme, preferably, described step 202 also comprises: detecting when need switching communication network, obtaining the information of the data service of being undertaken by described second communication module, and the information of described data service is transferred to described first communication module; Described step 204 also comprises: be connected with the data of described outside in the information foundation of the described first communication mould according to described data service, and begin to carry out described data service from switching point.
In this technical scheme, can guarantee two-way the taking over seamlessly between communication module in the multi-module mobile terminal, avoided switching the problem of the data service interruption that causes mutually because terminal can't realize Packet Service, thereby reduced user's stand-by period, promoted user's experience.
In technique scheme, preferably, also comprise: receive the data service request from application layer, according to default communication pattern, described data service request is sent to any one communication module in described first communication module and the described second communication module, to carry out network registry; When receiving the network registry failed message of described any one communication module, described data service request is sent to another communication module carries out network registry, to finish the corresponding data business.
In this technical scheme, user or manufacturer can preset the priority of the network connection of communication pattern in the multi-module mobile terminal and communication module, communication pattern in multi-module mobile terminal is set under the situation of multimode, according to the setting of user to network connection, start the highest communication module of priority and carry out network registry, the network registry success then directly uses this communication module to carry out data service, the network registry failure then starts other communication modules and carries out network registry.Like this, data connection stability and high-quality in the terminal have been guaranteed.
In technique scheme, preferably, the information of described data service comprises data service switching point information, IP address and/or domain name server information.
In this technical scheme, in order to guarantee the seamless switching between communication module, need be by communication interface with relevant informations such as data service switching point information, IP address and/or domain name server informations, transfer to from the communication module of turn-off data business and will set up the communication module that data service connects, like this, newly set up the communication module of data service connection and will then carry out data service from switching point according to these relevant informations, guaranteed the uninterrupted of data service, thereby make the interruption of the imperceptible data service of user, promoted user's experience.
In technique scheme, preferably, the communication network standard of described first communication module comprises the 3G (Third Generation) Moblie network, and the communication network standard of described second communication module comprises the 4th third generation mobile communication network; The communication network standard of described second communication module comprises the 3G (Third Generation) Moblie network, and the communication network standard of described first communication module comprises the 4th third generation mobile communication network.
Network between communication module switches the switching that comprises between 3G (Third Generation) Moblie network and the 4th third generation mobile communication network, namely can realize two-way seamless switching between 3G (Third Generation) Moblie network and the 4th third generation mobile communication network by this programme.
Be example with the LTE communication module of 4G network and the cdma communication module of 3G network below, describe technical scheme of the present invention in detail.
Fig. 3 shows the structure chart of multi-module mobile terminal according to an embodiment of the invention.
As shown in Figure 3, this programme is made up of three modules: LTE communication module 302, cdma communication module 304 and MMC(Multi-Mode Controller, multi-mode controller) 306, application layer (AP) 308.
Realize that by multi-mode controller (MMC) 306 solution that the network between LTE communication module 302 and the cdma communication module 304 switches is very flexibly, the MMC of core can reside in application layer 308 sides or CDMA protocol stack, be that a RIL (Radio Interface Layer, radio interface layer) who operates in side describes for example with MMC below.
MMC mainly is responsible for LTE-EVDO(Evolution Data Only) middleware of system's handoff functionality, by API(Application Programming Interface, application programming interface) mode keeps communicating by letter with LTE, CDMA protocol stack, thereby the seamless packet service of a kind of LTE of striding and EVDO system is provided.
Fig. 4 shows the concrete structure figure of multi-module mobile terminal according to an embodiment of the invention.
Along with cdma network to LTE evolution, the interoperability of data service has become very crucial problem.Present CDMA HRPD(High Rate Packet Data, HRPD (high rate packet data)) network can't be realized switching with the data service interoperability of LTE, need upgrade to eHRPD(evolved High Rate Packet Data, the high-speed packet network of evolution).Particularly under LTE networking initial stage, the incomplete situation of the LTE network coverage, the solution of interoperability is to promote user data service to experience, protect one of effective measures of existing 2G/3G network investment.This multimode terminal will be supported the seamless switching between LTE and the CDMA module data business.
EHRPD is to be evolution and the enhancing of EVDO network to former HRPD.Therefore be to upgrade to related network elements from CDMA EV-DO to eHRPD, upgrade to eAN/ePCF as AN/PCF, PDSN(Packet Data Serving Node, packet data serving node) upgrade to HSGW(HRPD Serving Gateway), i.e. HRPD gateway.Certainly from here as can be seen, for BTS(Base Transceiver Station, base station), eHRPD and HRPD do not have difference, that is to say that eHRPD has improved network integration mode, but make resource can rationally utilize the ability of not improving wireless side that this point is very crucial.From technology in essence, what eHRPD changed is core net partial function and characteristic, to the wireless side function of HRPD without any change.Therefore the eHRPD part is still continued to use HRPD BTS, and the business function eHRPD under the HRPD must support.But it is noted that eHRPD and HRPD adopt different core net, the Centroid of the core net of HRPD is PDSN, and the core node of eHRPD is HSGW, and it can be by the PDSN software upgrading.Two different core net mean different IP addresses, externally do not occur simultaneously, and the end-user service of HRPD is advanced metropolitan area network by the PDSN route, and the end-user service of eHRPD is by the striking out of HSGW-PGW route.
As shown in Figure 4, MMC layer 402 is responsible for the mutual switching of multimode system and control function, it also is one group and offers the api interface that upper level applications is used, such as IMS(IP Multimedia Subsystem, the IP multimedia system), VoIP(Voice over Internet Protocol, the networking telephone), SVLTE(Simultaneous Voice and LTE, LTE and voice network are supported synchronously) etc. application interface; Also comprise configuration-system option table, PDN(Public Data Network, public data network be provided) and QOS(Quality of Service, service quality) etc. information interface.
MMC-LTE interface 404 is control interfaces of realizing carrying out between LTE wave point 406 and the MMC layer 402 transfer of data, and this class interface comprises that System Selection(system selects), Measurement(measures), Handoff(switches), Redirection(resets) and Setup/Release(setting/release).
MMC-CDMA interface 406 adopts remote procedure call (Remote Procedure Call) technology that the method for calling the CDMA protocol stack is provided.Mainly comprise eHRPD(evolved High Rate Packet Data, the high-speed packet network of evolution)/cdma system in network switching interface and set up the PDN interface.
Wherein, when starting up of terminal, the flow process that the network connection of multi-module mobile terminal is set up, and undertaken under the situation of data service by one of them communication network, switch to handling process that alternative communication network carries out data service as shown in Figure 5, its concrete steps following (in conjunction with reference to figure 4):
Step 508 is judged whether successful registered network of LTE.If judged result enters step 510 for being, if judged result enters step 516 for not.
Step 514, if the LTE registration failure, MMC layer 402 sends the data service request by MMC-CDMA interface 406 so, request CDMA initiates the data service dialing.
Step 516 after the connection of CDMA data is set up successfully, is carried out transfer of data by Microsoft Loopback Adapter.
Need carry out network when switching detecting, namely when need switch to cdma network with the LTE network, control LTE suspension data business, obtain the information of the LTE data service of having carried out, and set up the connection of CDMA data service, the information of data service is sent to CDMA and controls LTE turn-off data business.In order to guarantee the seamless switching between communication module, need be by communication interface with relevant informations such as data service switching point information, IP address and/or domain name server informations, transfer to from the communication module of turn-off data business and will set up the communication module that data service connects, like this, newly set up the communication module of data service connection and will then carry out data service from switching point according to these relevant informations, guaranteed the uninterrupted of data service, thereby make the interruption of the imperceptible data service of user, promoted user's experience.
Detect and need carry out situation that network switches and have multiplely, for example detecting does not have LTE network signal or network signal quality switching command etc. relatively poor or that detect the user can think that all need carry out network switches.
The CDMA module from switching point, is then carried out data service according to the information of the data service of having carried out, as operations such as data downloads, disconnects the connection of LTE data service then.Though carried out the network switching, the user does not feel the interruption that data service takes place, and has namely realized the seamless switching of data.
Described the network handoff process of multimode terminal side above, and terminal protocol stack and network interaction flow process will be divided scene description below.
1, switching flow between two kinds of networks
An importance that realizes seamless switching between two kinds of technology is exactly the S101 interface, S101 be the terminal protocol stack and eat dishes without rice or wine between protocol interface.By this interface, UE(User Equipment, subscriber equipment) can be when setting up LTE and connecting and enhancement mode access node (eAN) exchange of signaling message.ENB(evolved Node B, evolved base station) and Mobility Management Entity (MME) route data pellucidly between UE and eAN.
1) switching from LTE to EV-DO
This type of switching need be used the call parameter of EVDO network.These parameters are at system information block type 8(SIB8) in transmit as system information, be sent to UE but also can connect by special use., relate to two kinds of network timings and synchronous relevant information here, in order to make required measurement as far as possible efficiently, and accelerated the process of exchange.
(a) initiatively switch
The active that network can be controlled from LTE to EV-DO is switched.For realizing this function, eNB can impel UE that predefined channel and base station are carried out measurement.Different with the inner switching of LTE, the inner switching measured the execution of detected base station.
Switching is divided into registered in advance, switches preparation, carries out and switch 3 stages.
Registered in advance is from the long-range generation of actual switching, and connects by virtual S101 fully and handle.UE can login base station and eHRPD network, and the identity of checking oneself.HSGW can connect and all relevant informations of PCRF rule reception by existing P DN.Finally, the resource in the eHRPD network is all kept.
This process may need the several seconds.Therefore, be absolutely necessary this separation for seamless switching between registered in advance and reality are switched.And this has also improved probability of successful, because arrived error source in the external detection of actual switching point.No matter whether network provides to optimize switch, if provide, in the time must upgrading corresponding registered in advance, can report to UE by the SIB8 that preamble is mentioned.
After the measurement result of receiving UE, finally be to be made switching by eNB determining.In handoff preparation phase, at first can open EVDO by the S101 passage and connect.This connects meeting reserved resources in the uplink and downlink physical channel.HSGW prepares transfer of data by packet data gateway (P-GW), and sets up the S103 passage.At last, successfully open connection to the UE report.Now, UE can switch to its receiver the EVDO carrier wave.Like this, switching preparation has just finished.Still arrive at the data of eNB or the data that do not send, can send it back gateway (S-GW) now, and this also helps to guarantee to be lossless data flow to be transmitted to HSGW. by S103.
After UE successfully inserted eHRPD, switching formally started as the last stage.UE at first can confirm establishment of connection.Next, P-GW can discharge and being connected of HSGW, and upgrades IP and connect.In this stage, at this moment HSGW. also can be distributed in the IP address of UE just can discharge among the EPS still available resource.At this moment, switching is finished.
(b) residential quarter is reselected
If UE is not in the connection of active state, the residential quarter then can take place reselect, rather than carry out the active switching.From E-UTRAN(Evolved Universal Terrestrial Radio Access Network, the general continental rise wireless access network of evolution) residential quarter reselects according to priority to the residential quarter of EVDO residential quarter and carries out.Given this, the network operation chamber of commerce distributes a priority for each HRPD frequency band kind, and this priority can be compared with the priority of E-UTRAN Serving cell (SC).If the HRPD residential quarter has higher priority, its Ec/I0 is than surpassing specific threshold value, and then UE can carry out the residential quarter to this residential quarter and reselect, and no matter the quality of connection of this SC how.But only when the quality of connection with SC was in unacceptable degree, the HRPD residential quarter that just can select to have lower priority was reselected in the residential quarter.
In RAT(Radio Access Technology, wireless access technology) inside carries out the residential quarter when reselecting, and network always information is unobstructed, and the paging information that imports into so just can obtain handling.In addition, by HSGW network settings are become amended data path.
(c) non-optimized switchover
Optimization mentioned above is switched can realize seamless switching between system, bring best impression for the user simultaneously.But, be optimized switching, network and UE need to change on a large scale.Non-optimized switchover provides another kind of simple method, thereby more economically.Its network architecture does not have S101 and S103 interface.Therefore, can carry out registered in advance by movable LTE connection.But between transfer period, carry out required step, can cause data, services to interrupt significant period of time.
This type of time of interrupting continuing depends on that previous eHRPD connects.For example, authentication be can ignore, and can contextual information and further session information be transmitted from other subnets.But, can only use the UE with two emissions (Tx) device and two receptions (Rx) device to carry out seamless switching.
2) switching from EVDO to LTE
For the switching of this direction, can only rely on the unoptimizable residential quarter to reselect fully.Registered in advance relates generally to appendage, and in this program, UE differentiates and verify the identity of oneself.Subsequently network is carried out suitable configuration, and set up radio bearer, upgrade tracking area subsequently.Now, probably can know the position of UE by network.When P-GW produce to trigger, HSGW can discharge itself and being connected of EPS, and the startup timer.As long as timer is also to the time, registered in advance and will always keep with the session of UE.
Fig. 6 shows according to an embodiment of the invention the CDMA pattern and selects flow chart automatically.
As shown in Figure 6, the CDMA pattern of one embodiment of the present of invention selects flow process as follows automatically:
Step 602 is carried out initialization to terminal.
Step 604 does not have Packet data service in determining terminal, and has selected under the situation of CDMA pattern, sends the request that LTE does not have service by the LTE-MMC interface to the LTE communication module.
Step 606, the LTE communication module receives after the request, discharge the public data network of LTE, and the message of the LTE communication module not being had service by the LTE-MMC interface is back to multi-mode controller.
Step 608 is set to mixed mode (Hybrid mode) if detect terminal, namely then sets up the data service of CDMA.Wherein Hybrid mode is the pattern of 1X and EVDO, just CDMA.Terminal can arrange pattern in the engineering mode of operation: only 1X mode of operation (1X only), only EVDO mode of operation (EVDO only) or Hybrid Mode.
Fig. 7 shows the flow chart that switches to the method for switching network of CDMA according to an embodiment of the invention from LTE.
Step 720 judges whether successfully to set up PDN and connects, if, then enter step 722, if not, then enter step 726.
Step 724 is after the LTE module success port data business, to MMC controller transmit port successful respond.LTE is to the seamless switching success of CDMA.
Step 726, when CDMA did not successfully set up the PDN connection, the MMC controller is redirected failure to LTE module transmitting system replied and initiates to recover LTE data service request.
Step 728 after the LTE module is successfully recovered data service, sends successful respond message to the MMC controller.
Fig. 8 shows the flow chart that switches to the method for switching network of LTE according to an embodiment of the invention from CDMA.
As shown in Figure 8, step 8042, terminal CDMA module has been set up data service, is in resting state.
Step 810 judges whether to satisfy the reselection condition according to operation result,, enters step 812, otherwise finishes this flow process when being in judged result.
Step 822 judges whether successfully to set up PDN and connects, if, then enter step 824, otherwise, this flow process finished.
Step 832 after the CDMA module is successfully recovered data service, sends successful respond to the MMC controller.
More than be described with reference to the accompanying drawings technical scheme of the present invention, by technical scheme of the present invention, when having solved heterogeneous networks and for example having switched between 4G network and the 3G network, data service can't be continuous problem, even carried out the network switching, data service is not interrupted yet, thereby has realized taking over seamlessly of high speed packet service between 4G network and the 3G network.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
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