CN102177748A - Method for network handover, user equipment, gateway and network system thereof - Google Patents

Abstract

The embodiments in the present invention disclose a method, user equipment (UE), gateway and network system for network handover. The method comprises: the long term evolution (LTE) network side sends the UE a message to indicate that the UE has been allowed to be registered with the evolved high rate packet data (eHRPD) network; when the UE has been registered with the eHRPD network via the eHRPD air interface, the eHRPD network side establishes a proxy mobile IP tunnel through which the UE is handed over to the eHRPD network. The UE comprises a registration module and a trigger module. The gateway comprises a receiving module and a tunnel establishment module. The system comprises a UE, a base station and an HRPD serving gateway (HSGW). The embodiments in the present invention can decrease the handover interrupt time and reduce the complexity of the network and the UE.

Description

A kind of method for switching network, terminal, gateway and network system

Plant method for switching network, terminal, gateway and network system technical field

The present invention relates to mobile communication technology field, more particularly to a kind of method for switching network, terminal, gateway and network system.Background technology

LTE (Long Term Evolution, long evolution in its month) technology is 3GPP (Third Generation Partnership Project, third generation partner program）Evolution, it improves and enhances 3G aerial access technology, using the sole criterion of OFDM and multiple-input and multiple-output as its wireless network evolution.In the lte networks, Serving Gateway (gateways）It is the gateway after evolution with PDN Gateway (grouped data network gateway, P-GW), is responsible for forwarding packet, MME (Mobility Management Entity, mobility management entity）It is Signaling control entity, is responsible for the functions such as authentication, mobile management.Network after evolution does not provide the phonetic function of legacy circuit-switched, only provides high data rate bearer service, and the network after evolution can also support the intercommunication with 3GPP Third Generation Wireless Data Network and second point five generations radio data network.

HRPD (High Rate Packet Data, High Rate Packet Data）It is a kind of 3GPP2 (Third Generation

Partnership Project 2, third generation partner program 2) third generation data radio communication system that defines, the phonetic function of legacy circuit-switched is not provided, high data rate bearer service is only provided.In HRPD networks, AN (Access Network, access network）Entity is a kind of network element, equivalent to base station and base station controller, is responsible for the functions such as the modulation /demodulation and switching of data.PCF (Packet Control Function, Packet Control Function）Entity is responsible for data forwarding and grouping data conversation state-maintenance.EHRPD (evolved High Rate Packet Data, the High Rate Packet Data of evolution）It is the HRPD e-learning qualities in order to be interoperated with LTE, i.e. HRPD networks to be interoperated with LTE network, it is necessary to first evolve to eHRPD.

As UE (User Equipment, also known as user equipment, terminal）When being switched to eHRPD network from LTE network, prior art generally completes switching using two ways.First way is to access unified EPC (Evolved Packet Core, evolution block core without interface, LTE and eHRPD between LTE and eHRPD wireless networks in non-optimized switchover, the non-optimized switchover network architecture）Net, access anchor point is PDN Gateway.When the switching between LTE and eHRPD occurs for UE, UE carries out eHRPD session negotiations, PPP (Point-to-Point Protocol, point-to-point protocol in eHRPD network）Consult and EAP-AKA (Extensible Authentication Protocol- Authentication and Key Agreement, extended authentication association, view-authentication and key protocol）Authentication, then by HSGW (HRPD Serving Gateway, HRPD gateways）The proxy mobile IP tunnel for initiating PDN Gateway is set up, PDN Gateway release PDN Gateway to S-GW (Serving Gateway, gateway）Between proxy mobile IP tunnel, complete LTE network to eHRPD network switching.

The second way switches for optimization, under optimization switching mode, two interfaces is added between LTE network and eHRPD network, an interface is MME and eAN (evolved Access Network, access network）Between S101 interfaces, its essence is a tunnel, signaling and data between forwarding UE and objective network, and auxiliary UE carries out pre-registration in objective network or from source network is switched to objective network；Another interface is the S103 interfaces between Serving Gateway and HSGW, for forwarding the data that 3GPP evolvement networks are detained to eHRPD network, is then sent to UE by eHRPD network.When UE resides in LTE network, pre-registration is carried out by LTE network and S101 tunnels in advance, eHRPD session negotiations, ppp negotiation, EAP-AKA authentications are performed with target eHRPD network；When meeting LTE to eHRPD switching condition, handover request is sent by LTE and S101 tunnels and given after target eHRPD, target eHRPD distributing radio resources, UE accesses target eHRPD further out LTE, so as to highly shortened the time of switching.Alternatively, the packet loss in the Lossless transport of data, reduction transmitting procedure can also be solved the problems, such as using S103 tunnels.

In implementing the present invention, it may, inventor has found at least to have the following disadvantages in the prior art：

Under first way when UE determines to initiate the switching from LTE to eHRPD, it have left source LTE network, and perform the processes such as eHRPD session negotiations, ppp negotiation and EAP-AKA authentications in target eHRPD network, due to performing these processes it is generally necessary to several seconds time, cause HO-break duration longer, have impact on the experience of user.Although the second way significantly reduces the business interruption time of LTE to eHRPD switchings, but need to increase by two interfaces between LTE and eHRPD network, add network complexity, and need to change UE protocol stack, UE can be just set to send eHRPD message by LTE, so as to add UE complexity.The content of the invention

The embodiments of the invention provide a kind of method for switching network, terminal, gateway and network system, the complexity of switching times and reduction network and UE of the UE from LTE network to eHRPD network can be shortened.

The technical scheme is as follows：

A kind of method for switching network, applied to Long Term Evolution LTE network and the High Rate Packet Data eHRPD network of evolution, including：

The lateral terminal of the LTE network sends message, indicates the registration for allowing the terminal to carry out eHRPD network；When the terminal is switched to the eHRPD networks by the eHRPD registrations and decision for eating dishes without rice or wine to be accomplished to the eHRPD network, the eHRPD network sides are set up from high-rate packet data services gateway HSGW to grouped data network gateway P-GW proxy mobile IP tunnel, and the terminal is completed to the switching of the eHRPD network by the proxy mobile IP tunnel.

A kind of terminal, including： Registering modules, for when the terminal resides in Long Term Evolution LTE network, being eated dishes without rice or wine to carry out the registration of eHRPD network by the High Rate Packet Data eHRPD of evolution according to the instruction of the LTE network；

Trigger module, for after the Registering modules complete registration and the terminal determines to be switched to the eHRPD network, foundation eats dishes without rice or wine to connect, trigger the eHRPD network to set up from high-rate packet data services gateway HSGW to grouped data network gateway P-GW proxy mobile IP tunnel, the terminal is completed from the LTE network to the switching of the eHRPD network by the proxy mobile IP tunnel.

A kind of gateway, positioned at the High Rate Packet Data eHRPD network of evolution, the gateway includes：

Receiving module, the request message sent for receiving terminal in the registration process for carrying out eHRPD network；

Tunnel building module, whether the content of the type of attachment field for judging to carry in the request message that the receiving module is received is registration, if, the proxy mobile IP tunnel to grouped data network gateway P-GW is then set up not in the registration process, when the terminal completes to be switched to the eHRPD network to the registration of the eHRPD network and decision from the LTE network, the proxy-mobile IP tunnel of the P-GW is set up, the terminal is completed to the switching of the eHRPD network by the proxy-mobile IP tunnel.

A kind of network system, including：

Terminal, for when itself residing in Long Term Evolution LTE networks, eated dishes without rice or wine to carry out the registration of eHRPD network by eHRPD according to the instruction from the LTE networks, set up with the eHRPD network eat dishes without rice or wine be connected, triggering eHRPD networks foundation is from high-rate packet data services gateway HSGW to grouped data network gateway P-GW proxy mobile IP tunnel；Base station, positioned at the LTE networks, for sending message to the terminal, indicates the registration for allowing the terminal to carry out eHRPD networks；

High-rate packet data services gateway HSGW, positioned at the eHRPD network, for being completed when the terminal from described

LTE network to the eHRPD network registration when, set up the proxy mobile IP tunnel to grouped data network gateway P-GW, the terminal completed from the LTE network to the switching of the eHRPD network by the proxy mobile IP tunnel.

The embodiment of the present invention passes through before UE determines to initiate the switching from LTE to eHRPD, in LTE network by eHRPD eat dishes without rice or wine carry out eHRPD network registration, significantly reduce HO-break duration, improve the experience of user, and be not used between LTE and eHRPD network increasing interface, reduce the complexity of network, it is not required that modification UE protocol stack, reduce UE complexity.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, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, it should be apparent that, drawings in the following description are only the one of the present invention A little embodiments, for those of ordinary skill in the art, without having to pay creative labor, can also obtain other accompanying drawings according to these accompanying drawings.

Fig. 1 is the Organization Chart of LTE network provided in an embodiment of the present invention and eHRPD network；

Fig. 2 is a kind of method for switching network flow chart provided in an embodiment of the present invention；

Fig. 3 is register flow path figure in method for switching network provided in an embodiment of the present invention；

Fig. 4 is a kind of switching flow figure in method for switching network provided in an embodiment of the present invention；

Fig. 5 is session keepalive flow chart provided in an embodiment of the present invention of eating dishes without rice or wine；

Fig. 6 is subnet exception processes flow chart provided in an embodiment of the present invention；

Fig. 7 is another switching flow figure provided in an embodiment of the present invention；

Fig. 8 is another method for switching network flow chart provided in an embodiment of the present invention；

Fig. 9 is terminal structure schematic diagram provided in an embodiment of the present invention；

Figure 10 is architecture of base station schematic diagram provided in an embodiment of the present invention；

Figure 11 is gateway architecture schematic diagram provided in an embodiment of the present invention；

Figure 12 is eAN structural representations provided in an embodiment of the present invention；

Figure 13 is network architecture schematic diagram provided in an embodiment of the present invention.Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.

Technical scheme provided in an embodiment of the present invention is applied to the scene that terminal is switched in LTE network and eHRPD network, and the network architecture is as shown in Figure 1.Dotted line top is LTE network in figure, passes through the eNodeB (base stations of evolution）It is eHRPD network to be provided for terminal UE below service, dotted line, passes through HRPD BTS (Base Transceiver Station, base transceiver station）Service is provided for terminal UE.

Terminal in the embodiment of the present invention includes dual-mode terminal and multimode terminal, for example, LTE network access techniques and the dual-mode terminal of eHRPD network access technology are supported, and supports the multimode terminal of HRPD access technologies, CDMA2000 lx access technologies and LTE access technologies.Wherein, dual-mode terminal includes single-emission and double-receiving terminal again and double hairs pair receive terminal.Single-emission and double-receiving terminal refers to the dual-mode terminal with two receivers and an emitter, and it can receive two networks simultaneously（Different wireless access technologys）Information, but sometime, information can only be sent in a network, and letter can not be sent in two networks simultaneously Breath.The double terminals of receiving of double hairs refer to the dual-mode terminal with two receivers and two emitters, and it can receive the information of two networks simultaneously, and can send information in two networks simultaneously.The more double hairs of cost of single-emission and double-receiving terminal are double to receive the with low cost of terminal, and an emitter power consumption is less, and the double terminals of receiving of double hairs are high compared with the cost of single-emission and double-receiving terminal, and two emitter more power consumptions.

Referring to Fig. 2, the embodiments of the invention provide a kind of method for switching network, it can include：

201：The terminal of LTE network is resided according to the instruction of LTE network, eats dishes without rice or wine to carry out the registration of eHRPD network by eHRPD；

Wherein, the registration process includes：The processes such as eHRPD session negotiations, ppp negotiation and EAP-AKA authentications；EAP-AKA is a kind of two-way authentication protocol, it is possible to achieve terminal and the mutual authentication of network；

202：When terminal determines to be switched to eHRPD network, set up with eHRPD network eat dishes without rice or wine be connected, and trigger eHRPD networks and set up proxy mobile IP tunnel；

Wherein, mobile IP (MIP, Mobile IP) is that one kind realizes the ambulant agreements of IP, when user moves between different IP networks, can guarantee that distribution identical IP address.Proxy-mobile IP (PMIP, Proxy Mobile IP) refers to by a network element in network（Such as Serving Gateway in the LTE network or HSGW in eHRPD network) proxy terminal initiation mobile IP protocol, it is not necessary to terminal supports mobile IP protocol, simplifies the processing of terminal；

In embodiments of the present invention, proxy mobile IP tunnel is set up between HSGW and P-GW；

203：Proxy mobile IP tunnel completes switching of the terminal from LTE network to eHRPD network.

Present invention method can be adjusted to each sequence of steps according to actual needs.The embodiment of the present invention passes through before terminal determines to initiate the switching from LTE to eHRPD, in LTE network by eHRPD eat dishes without rice or wine carry out eHRPD network registration, significantly reduce HO-break duration, improve the experience of user, and be not used between LTE and eHRPD network increasing interface, reduce the complexity of network, it is not required that the protocol stack of modification terminal, reduce the complexity of terminal.

The embodiment of the present invention additionally provides a kind of LTE network to the switching method of eHRPD network, including two flows of registration and switching, and referring to Fig. 3, switching flow can include：

301：Starting up of terminal, because the priority of LTE network is higher than eHRPD network, therefore terminal first searches LTE network. 302：Terminal is successfully searched after LTE network, and terminal performs the initial attaching process of the registration process of LTE network, i.e. LTE networks in LTE network（Initial Attach), the proxy mobile IP tunnel set up in the registration process is located between S-GW and P-GW.

303：Terminal is received after the system broadcast message of LTE networks, judge whether the pre-registration field PreRegistrationAllowed in the system broadcast message is arranged to " allow ", judge whether network side indicates to allow endpoint registration to eHRPD networks, if the pre-registration field is arranged to " allow ", then terminal searching eHRPD network, if the pre-registration field quilt " not allowing " is set to, then terminal does not search for eHRPD network.

Specifically, if terminal is single-emission and double-receiving terminal, the terminal searches for eHRPD network in LTE Idle state；If terminal receives terminal for double hairs are double, the terminal searches for eHRPD network in LTE Idle state or LTE activated states.

In the present embodiment, terminal using the above-mentioned pre-registration field using in system broadcast message in addition to by the way of being judged, it can also be judged using other manner, for example, increase new field in system broadcast message, indicate currently to allow endpoint registration into eHRPD network by setting the new field for " permission " or " not allowing ", or indicate currently not allowing endpoint registration into eHRPD network.

304：Terminal searching eats dishes without rice or wine to proceed by the registration of eHRPD network to after eHRPD network by eHRPD, that is, starts to perform the initial attaching process of eHRPD network, the registration process includes：EHRPD eat dishes without rice or wine session negotiation, ppp negotiation and EAP-AKA authentication etc. process, but include PDN connections foundation and subsequent process.If terminal is single-emission and double-receiving terminal, then terminal searching is to after eHRPD network, it is switched to eHRPD patterns to eat dishes without rice or wine to proceed by the registration of eHRPD network by eHRPD, if terminal receives terminal for double hairs are double, directly eats dishes without rice or wine to proceed by the registration of eHRPD network by eHRPD.

305：Terminal sends VSNCP (Vendor Specific Network Control Protocol, equipment vendor's extended network control protocol）Configuration request message VSNCP Config-Req set up PDN connections, and the type of attachment in the configuration request message to HSGW, request（Attach Type) field is set to " register "（Registration Only), for example, the value of the field is set to 255, represent " registration ", type of attachment field is set to " to register " to the proxy mobile IP tunnel that the HSGW for being used to refer to show in eHRPD network is not used in setting up in the registration process of the eHRPD network to P-GW, in the present embodiment, the proxy mobile IP tunnel between HSGW and P-GW is set up during terminal is switched to eHRPD network from LTE network.

VSNCP is a kind of PPP Network Control Protocols of extension, and PDN connections are generally set up using VSNCP agreements in eHRPD network.In the present embodiment, the type of attachment field in VSNCP configuration request messages can be configured to：" initial attachment ", " switching " or " registration ".When the type of attachment field is arranged to " initial attachment " or " switching ", HSGW then performs corresponding handling process.

In this step, the PDN ID in the configuration request message could be arranged to default PDN ID, and usual value is 15.If terminal establishes multiple PDN connections in LTE, terminal resettles non-default PDN connections without initiating the registration of non-default PDN connections after eHRPD network is actually handovered to.

306：HSGW, which is set up, arrives PCRF (Policy and Charging Rules Function, "Policy and Charging Rules Function）The gateway control session of entity, the gateway control session can not also be set up when endpoint registration is to eHRPD network, but be resettled when terminal is switched to eHRPD network.

307：HSGW judges whether the type of attachment field in the VSNCP configuration request messages received is " registration ", if It is not set up P-GW proxy mobile IP tunnel then, VSNCP configure-ack message VSNCP Config-Ack is returned directly to terminal;Otherwise, corresponding handling process, such as initial attachment flow, switching flow are performed according to the content of type of attachment field.

308:HSGW sends VSNCP configuration request message VSNCP Config-Req to terminal, and the PDN ID carried in the message are identical with the PDN ID in the VSNCP configuration request messages that terminal is sent.

309：Terminal is received after the VSNCP configuration request messages of HSGW transmissions, VSNCP configure-ack message VSNCP Config-Ack are returned to HSGW, above-mentioned PDN ID are carried in the VSNCP configure-ack message, so far, terminal completes the registration process of eHRPD network.

310：If now terminal meets the LTE condition of residing in, terminal eats dishes without rice or wine the eHRPD set up in above-mentioned eHRPD network registration process Connection Releases, into dormant state.Generally; terminal first consults session of eating dishes without rice or wine; then connection of eating dishes without rice or wine is set up; terminal is accomplished to after the registration of eHRPD network; eHRPD can be discharged to eat dishes without rice or wine connection, but eHRPD eats dishes without rice or wine, session needs keep-alive, eats dishes without rice or wine session keepalive by eHRPD; eHRPD session informations of eating dishes without rice or wine can be caused not lose, eHRPD session informations of eating dishes without rice or wine include but is not limited to：The protocol type of negotiation, property value that agreement protocol is used, parameter etc..

311：When terminal is single-emission and double-receiving terminal, terminal is switched to LTE patterns, if terminal receives terminal for double hairs are double, without carrying out this step.

Further, if terminal receives the paging from LTE network in eHRPD network registration process, the then ongoing eHRPD network registration of terminal aborts, this registration failure, and the paging from LTE network is handled, re-start the registration of eHRPD network again when terminal enters LTE Idle state.

Said process is the registration process for the terminal progress eHRPD network for residing in LTE network, after terminal is accomplished to the registration of eHRPD networks, if at a time terminal meets the condition for being switched to eHRPD network, then terminal can initiate the switching of eHRPD networks, referring to Fig. 4, switching flow can include：

401：When terminal judges that the channel quality of LTE cells is less than default first thresholding, and when the channel quality of eHRPD cells is higher than default second thresholding, terminal judgement is switched to eHRPD network, connection request message ConnectionRequest is sent in eHRPD network to network side, process is set up in the connection for performing standard.Wherein, the value of the first thresholding and the second thresholding is to set respectively in advance, and the usual value of the two is differed.

402：EAN is received after the connection request message that terminal is sent, according to UATI (the Unicast Access Terminal Identifier, access terminal unicast mark of the terminal carried in the message）Judged, judge the Subnet Identification in the UATI（That is colour coding, Color Code) whether it is the mark of itself, if, then determine that UATI renewals, the UATI otherwise, it determines terminal does not upgrade in time need not be carried out, the mark of Subnet Identification source subnet where terminal in the UATI, subnet where present terminal is the targeted subnet of terminal, it is therefore desirable to carry out UATI renewals, the Subnet Identification in the UATI determines the source of terminal S-eAN in eAN, i.e. figure, and obtain from S-eAN the session information of eating dishes without rice or wine of terminal, specifically, the A13 conversation shifts process for performing standard obtain eHRPD from S-eAN and eated dishes without rice or wine session information.By the result that judges to illustrate exemplified by no in Fig. 4.

403：If eAN determines that UATI renewals need not be carried out, eA sends TCA (Traffic Channel Assignment, Traffic Channel Assignment message to terminal）, it is that terminal sets up Traffic Channel；If eAN determines to need to carry out UATI renewals, UATI assignment messages are sent to terminal（UATI Assignment) and TCA, the UATI of more new terminal, and set up Traffic Channel for terminal.

Wherein, UATI is made up of two parts, Subnet Identification and terminal iidentification, and Subnet Identification is used to identify different subnets, and each Subnet Identification uniquely corresponds to a subnet, and the subnet eAN;Terminal iidentification is the only effective in the subnet, for identifying the terminal in the subnet.

404：If terminal receives TCA, TCC (Traffic Channel Complete, Traffic Channel completion message are returned）To eAN, represent that Traffic Channel is successfully established；If terminal receives UATI assignment messages and TCA, terminal returns to UATI assignment completion messages（UATI Assignment Complete) standing grain P TCC, represent that UATI updates and complete to be successfully established with Traffic Channel.

405：EAN sends All login request messages to HSGW（All-Registration Request), start comprising activation in the message（Active-Start) the station message recording, show that terminal has accessed eHRPD network.

406：HSGW is received after Al l login request messages, judge whether include the Active-Start station message recordings in the message, if comprising, then show to establish Traffic Channel for terminal, HSGW sends proxy-mobile IP binding update messages (PMIP Binding Update) to P-GW, sets up proxy mobile IP tunnel.

407：P-GW is interacted with PCRF, reports RAT (Radio Access Type, wireless access type）The event of change, initiates IP-CAN session modification processes, updates IP-CAN sessions.

408：P-GW returns to proxy-mobile IP binding acknowledgement message（PMIP Binding Ack), this step can also be performed after 406.

409：HSGW returns to Al l registration reply message to eAN（All-Registration Reply) message, proxy mobile IP tunnel, which is set up, to be completed, and the switching of terminal to eHRPD network is completed, and this step can also be performed after 405.

410：If terminal, which is switched to before eHRPD network, has special QoS (Quality of Service, service quality）Flow, then HSGW uses RSVP (Resource reservation Protocol, RSVP）Notice of settlement terminal sets up corresponding QoS flow.This step is optional step, is represented by dashed line in figure.

411：If terminal, which is switched to before eHRPD network, has established multiple PDN connections, terminal initiates non-default PDN connections foundation after switching.This step is also optional step, is represented by dashed line in figure.

In addition, 410 and 411 can also be carried out parallel, corresponding PDN connections will be waited by belonging to some PDN special QoS flow Just set up after foundation, if special QoS flow sets up failure, notify PCRF to delete corresponding QoS flow.

412：P-GW sends binding release and indicates message（Binding Revocation Indication) give S-GW, the resource of triggering release LTE sides.

Fig. 3 and Fig. 4 combine the flow for fully describing registration and switching.Further, after the registration that terminal completes eHRPD network, can also eat dishes without rice or wine session maintenance to eHRPD, including eat dishes without rice or wine session keepalive and subnet exception processes, and referring to Fig. 5, session keepalive flow of eating dishes without rice or wine can specifically include：

501：Terminal completes to reside in LTE network after the registration of eHRPD network.

502：EAN sends keep-alive request message（KeepAliveRequest) give terminal, carry out eHRPD eat dishes without rice or wine session detection. 503：Whether terminal is received after the keep-alive request message, be designated as allowing to be registered to eHRPD network in the system broadcast message for judging the LTE network sides being currently received, and such as judges pre-registration field（PreRegistrationAllowed) whether it is " permission "; if; then carry out eHRPD eat dishes without rice or wine session keepalive processing; otherwise; handled without eHRPD session keepalives, in this case, if eAN detects default keep-alive time-out time then; then delete eHRPD to eat dishes without rice or wine session, exit login state.

Wherein, terminal carry out eHRPD eat dishes without rice or wine session keepalive processing, can specifically include：

If terminal receives terminal for double hairs are double, the double terminals of receiving of this pair hair carry out session keepalive processing of eating dishes without rice or wine in eHRPD network；If terminal is single-emission and double-receiving terminal; then the single-emission and double-receiving terminal judges the state of itself, if LTE Idle state, then is switched to eHRPD patterns and carries out session keepalive processing of eating dishes without rice or wine; if LTE activated states; then judge whether to reach default keep-alive time-out time, if it is, being switched to eHRPD patterns carries out session keepalive processing of eating dishes without rice or wine; otherwise; mark is set, indicated when single-emission and double-receiving terminal enters LTE Idle state, then carry out session keepalive processing of eating dishes without rice or wine.

Wherein, different values can be arranged as required into by presetting keep-alive time-out time, and such as default 18 hours are keep-alive time-out time.Further; the number of times of keep-alive time-out can also be preset; for example; when default keep-alive time-out reaches 3 times; deletion is eated dishes without rice or wine session; when single-emission and double-receiving terminal is in LTE activated states, if keep-alive time-out reaches the 3rd time, it is immediately switched to eHRPD patterns and carries out session keepalive processing of eating dishes without rice or wine.

504：Terminal returns to keep-alive response message（KeepAliveResponse eAN, eAN) to continue to retain existing session information of eating dishes without rice or wine.

505：Terminal close eHRPD emitters, be switched to LTE patterns, i.e., be tuned to LTE network.

Terminal is handled by session keepalive of eating dishes without rice or wine, and can maintain session of eating dishes without rice or wine, it is ensured that session information of eating dishes without rice or wine is not lost, so as to avoid renegotiating session of eating dishes without rice or wine when switching and performing, to reduce the switching terminal time.

Referring to Fig. 6, after the registration that terminal completes eHRPD network, subnet exception processes can also be carried out, including： 601：Terminal completes to reside in LTE network after the registration of eHRPD network.

602：EAN periodic broadcasts rapid configuration and Sector Parameter Message（QuickConfig & SectorParameters). 603：Terminal is received after rapid configuration and Sector Parameter Message, judge whether the subnet in eHRPD network changes according to the content of rapid configuration and Sector Parameter Message, if subnet changes, i.e. terminal is moved to targeted subnet from source subnet, whether it is designated as allowing to be registered to eHRPD network in the system broadcast message for then judging the LTE network side being currently received, if, then when terminal is in LTE Idle state, carry out UATI renewals, or when terminal is in LTE activated states, updated without UATI, but UATI renewals are carried out again after terminal enters LTE Idle state, if terminal is always maintained at LTE activated states until being switched to eHRPD network, UATI renewals are then carried out while terminal switches.

Wherein, if terminal is single-emission and double-receiving terminal, progress UATI renewals after eHRPD patterns are switched to, if terminal receives terminal for double hairs are double, directly UATI renewals are carried out in eHRPD network.

604：Terminal performs UATI assignment process, and new UATI is obtained from the T-eAN/PCF of targeted subnet, if source subnet and targeted subnet belong to identical eAN, the eAN gives one UATI of terminal distribution again;If source subnet and targeted subnet belong to different eAN, the T-eAN/PCF of targeted subnet performs A13 sessions and eated dishes without rice or wine session information from the S-eAN/PCF migrations eHRPD of source subnet, and distributes new UATI, is then sent to terminal.

605：When terminal is single-emission and double-receiving terminal, close eHRPD emitters, be tuned to LTE network, if terminal receives terminals for double hairs are double, without carrying out this step.

Terminal passes through subnet exception processes, it can ensure that UATI is updated, and be eated dishes without rice or wine session information from source S-eAN/PCF migrations eHRPD, so as to avoid the session information loss of eating dishes without rice or wine consulted, so when switching execution without renegotiating session of eating dishes without rice or wine, to reduce HO-break duration.

In addition, in the embodiment of the present invention, terminal can also carry out PPP session maintenances after the registration of eHRPD network is carried out, specific as follows：

When terminal receives the PPP sessions detection message that HSGW is sent, if terminal is in LTE network, PPP sessions detection message is not responding to.

When eAN eats dishes without rice or wine session keepalive detection time-out, eHRPD can be discharged and eated dishes without rice or wine session, correspondingly, eAN/PCF can initiate main A10 Connection Releases, so as to trigger HSGW release PPP sessions.

Generally, all users are treated as Always-on user by HSGW（It is i.e. always online）, HSGW do not realize PPP Session timer sessions timing.PPP periods of inactivity in HSGW（PPP inactivity timer) default value be 0, i.e. PPP nonmobile phases be without limit, HSGW will not initiate PPP sessions detection.Preferably, PPP periods of inactivity uses default value 0, when PPP periods of inactivity is configured as nonzero value, then when periods of inactivity reaches the defined time, HSGW can send LCP Echo Request message and carry out PPP session detections to terminal, terminal is received after PPP sessions detection message, if terminal is currently resident in LTE network, LCP Echo Reply response messages are not returned to then, the PPP sessions can be discharged so as to HSGW, PPP is rebuild when terminal is switched to eHRPD network next time. Terminal carries out PPP session maintenances, it is not responding to HSGW PPP sessions detection, it can prevent due to response PPP sessions, and cause to set up Traffic Channel to terminal, so that network side identification terminal has been switched to eHRPD network, so as to occur switching of the unnecessary LTE network to eHRPD network.

In the embodiment of the present invention, further, after terminal is accomplished to the registration of eHRPD network, eated dishes without rice or wine not discharging eHRPD before connection, if now lucky terminal meets the condition for being switched to eHRPD network, then terminal can eat dishes without rice or wine to connect using the eHRPD not discharged performs switching flow, referring to Fig. 7, can specifically include：

701：Terminal completes the registration from LTE network to eHRPD network, eated dishes without rice or wine not discharging eHRPD before connection, detect terminal and meet the condition for being switched to eHRPD network, VSNCP configuration request message VSNCP Config-Req are sent to HSGW, the type of attachment field in the message is arranged to " switching attachment "（Handover Attach), trigger the foundation of proxy mobile IP tunnel.

702：HSGW is received after the VSNCP configuration request messages, eat dishes without rice or wine to connect due to there is eHRPD, eHRPD need not be re-established to eat dishes without rice or wine to connect, and UATI updates and set up Traffic Channel, proxy mobile IP tunnel is directly set up, and terminal is completed to the switching of eHRPD network using the proxy mobile IP tunnel.Wherein, HSGW sets up proxy mobile IP tunnel and terminal is accomplished to the handoff procedure of eHRPD network, and specifically with 406 412 in the embodiment of the present invention, here is omitted.

Present invention method can be adjusted to each sequence of steps according to actual needs.

The above method provided in an embodiment of the present invention passes through before terminal is switched to eHRPD network, eat dishes without rice or wine to be registered by eHRPD, before the switching for occurring LTE to eHRPD, complete eHRPD eat dishes without rice or wine session negotiation, ppp negotiation and EAP-AKA authentication, the switching that eHRPD is eated dishes without rice or wine to connect and carried out proxy mobile IP tunnel is only set up in switching, the business interruption time that LTE networks switch to eHRPD network is significantly reduced.Compared with existing optimization switching, do not completed by LTE and S101 tunnels, significantly reduce the complexity of network.Moreover, also without the protocol stack of modification terminal, reducing the complexity of terminal.In addition, after terminal completes eHRPD network registration, terminal carries out eat dishes without rice or wine session keepalive and subnet exception processes, it can be ensured that terminal will not exit eHRPD login states as needed in LTE Idle state, it is ensured that the validity of eHRPD registrations.Eated dishes without rice or wine conversation information maintenance by preferentially performing eHRPD in LTE Idle state, can avoid producing influence to the ongoing business of LTE network, improve service quality, improve Consumer's Experience.Referring to Fig. 8, the embodiment of the present invention additionally provides a kind of method for switching network, can specifically include：

801：The lateral terminal of LTE network sends message, indicates the registration for allowing terminal to carry out eHRPD network；

802：When terminal eats dishes without rice or wine to be accomplished to the registration of eHRPD network by eHRPD and decision is switched to eHRPD network, proxy mobile IP tunnel is set up in eHRPD network side, and terminal is completed to the switching of eHRPD network by proxy mobile IP tunnel. Further, the above method can also include：

In the registration process that terminal carries out eHRPD network, equipment vendor's extended network control protocol VSNCP configuration request messages of the HSGW receiving terminals transmission of eHRPD network side；HSGW judges whether the type of attachment field carried in the configuration request message is registration, if it is, HSGW sets up the proxy-mobile IP tunnel to grouped data network gateway not in registration process.

Further, the above method can also include：

After terminal is accomplished to the registration of eHRPD network, the eAN of eHRPD network side, which is sent, eats dishes without rice or wine session keepalive request message to terminal；And the session keepalive response message of eating dishes without rice or wine that eAN receiving terminals are returned according to the instruction and the state of itself of LTE network side.

Further, the above method can also include：

When terminal is accomplished to the registration of eHRPD network, and detect after the subnet in eHRPD network changes, the eAN for the targeted subnet that terminal is currently located judge itself whether be source subnet before subnet change where terminal eAN, if, then eAN gives one access terminal unicast of terminal distribution mark UATI, otherwise, and the eAN of targeted subnet eats dishes without rice or wine session information from the eAN migrations eHRPD of source subnet, and be one new UATI of terminal distribution, it is then sent to terminal.

Further, before proxy mobile IP tunnel is set up in eHRPD network side, it can also include：

The connection request message that the eAN receiving terminals of eHRPD network side are sent in eHRPD network；

EAN judges whether the Subnet Identification in the access terminal unicast mark of terminal is the mark of itself according to connection request message；If it is, eAN sends Traffic Channel Assignment message to terminal, it is that terminal sets up Traffic Channel；

Otherwise, Subnet Identifications of the eAN in access terminal unicast mark determines the source eAN of terminal, and the session information of eating dishes without rice or wine of terminal is obtained from source eAN, then send access terminal unicast to terminal and identify assignment message and Traffic Channel Assignment message, the access terminal unicast mark of more new terminal, and set up Traffic Channel for terminal.

Present invention method can be adjusted to each sequence of steps according to actual needs.

The above method provided in an embodiment of the present invention passes through before terminal is switched to eHRPD network, eat dishes without rice or wine to be registered by eHRPD, before the switching for occurring LTE to eHRPD, complete eHRPD eat dishes without rice or wine session negotiation, ppp negotiation and EAP-AKA authentication, the switching that eHRPD is eated dishes without rice or wine to connect and carried out proxy mobile IP tunnel is only set up in switching, the business interruption time that LTE networks switch to eHRPD network is significantly reduced.Compared with existing optimization switching, do not completed by LTE and S101 tunnels, significantly reduce the complexity of network.Moreover, also without the protocol stack of modification terminal, reducing the complexity of terminal.In addition, after terminal completes eHRPD network registration, terminal carries out eat dishes without rice or wine session keepalive and subnet exception processes, it can be ensured that terminal will not exit eHRPD login states as needed in LTE Idle state, it is ensured that the validity of eHRPD registrations.Eated dishes without rice or wine conversation information maintenance by preferentially performing eHRPD in LTE Idle state, can avoid entering LTE network Capable business produces influence, improves service quality, improves Consumer's Experience.Referring to Fig. 9, the embodiment of the present invention additionally provides a kind of terminal, can include：

Registering modules 901, for when terminal resides in LTE network, being eated dishes without rice or wine to carry out the registration of eHRPD network by eHRPD according to the instruction of LTE network；

Trigger module 902, for after Registering modules 901 complete registration and terminal determines to be switched to eHRPD network, foundation eats dishes without rice or wine to connect, and proxy mobile IP tunnel of the eHRPD network foundation from HSGW to P-GW is triggered, the proxy mobile IP tunnel is used to complete switching of the terminal from LTE network to eHRPD network.

When above-mentioned terminal is single-emission and double-receiving terminal, Registering modules 901 can specifically include：

First registering unit, if the single-emission and double-receiving terminal for residing in LTE network receives the system broadcast message of LTE network side, and indicate to allow to be registered to eHRPD network in system broadcast message, then when single-emission and double-receiving terminal is LTE Idle state, it is switched to eHRPD patterns and eats dishes without rice or wine to carry out the registration of eHRPD network by eHRPD；

When above-mentioned terminal receives terminal for double hairs are double, Registering modules 901 can specifically include：

Second registering unit, if for residing in, double hairs in LTE network are double to receive the system broadcast message that terminal receives LTE network side, and indicate to allow to be registered to eHRPD network in system broadcast message, then when the double receipts terminals of double hairs are LTE Idle state or LTE activated states, eat dishes without rice or wine to carry out the registration of eHRPD network by eHRPD.

Further, above-mentioned terminal can also include：

Connection establishment module, for in the registration process that terminal carries out eHRPD network, equipment vendor's extended network control protocol VSNCP configuration request messages are sent to eHRPD network side, packet data network connection is set up in request, when the content of the type of attachment field carried in the configuration request message is registration, it indicates that the HSGW in eHRPD network is not used in setting up the proxy mobile IP tunnel from HSGW to P-GW in the registration process.

Further, when above-mentioned terminal receives terminal for double hairs are double, it can also include：

First eats dishes without rice or wine session keepalive module; for after the double registrations for receiving terminal progress eHRPD network of double hairs; when double hairs are double receive that terminals receive that the access network eAN of evolution sends eat dishes without rice or wine session keepalive request message when; if being designated as allowing to be registered to eHRPD network in double double system broadcast messages for receiving the LTE network side that terminal is currently received of hair, the double terminals of receiving of double hairs carry out session keepalive processing of eating dishes without rice or wine；

Or, when above-mentioned terminal is single-emission and double-receiving terminal, it can also include：

Second eats dishes without rice or wine session keepalive module; for after the registration that single-emission and double-receiving terminal carries out eHRPD network; when single-emission and double-receiving terminal receive eAN transmission eat dishes without rice or wine session keepalive request message when; if being designated as allowing to be registered to eHRPD network in the system broadcast message for the LTE network side that single-emission and double-receiving terminal is currently received; then single-emission and double-receiving terminal judges the state of itself, if LTE Idle state; then carry out session keepalive processing of eating dishes without rice or wine; if LTE activated states; then judge whether to reach default keep-alive time-out time, if it is, carrying out session keepalive processing of eating dishes without rice or wine; otherwise; mark is set, indicated when single-emission and double-receiving terminal enters LTE Idle state, then carry out session keepalive processing of eating dishes without rice or wine.

Further, above-mentioned terminal can also include：

Subnet exception processes module, for after the registration that terminal carries out eHRPD network, when the subnet that terminal is detected in eHRPD network changes, if being designated as allowing to be registered to eHRPD network in the system broadcast message for the LTE network side that terminal is currently received, then when terminal is LTE Idle state, carry out access terminal unicast mark to update, or when terminal is LTE activated states, access terminal unicast mark is carried out during eHRPD network is switched to and is updated.

Further, above-mentioned terminal can also include：

Peer to peer session maintenance module, for after the registration that terminal carries out eHRPD network, when terminal receives the peer to peer session detection message that high-rate packet data services gateway is sent, if terminal is in LTE network, peer to peer session detection message is not responding to.

The modules of the embodiment of the present invention can be integrated in one, and can also be deployed separately.Above-mentioned module can be merged into a module, can also be further split into multiple submodule.

Above-mentioned terminal provided in an embodiment of the present invention passes through before eHRPD network is switched to, eat dishes without rice or wine to be registered by eHRPD, before the switching for occurring LTE to eHRPD, complete eHRPD eat dishes without rice or wine session negotiation, ppp negotiation and EAP-AKA authentication, the switching that eHRPD is eated dishes without rice or wine to connect and carried out proxy mobile IP tunnel is only set up in switching, the business interruption time that LTE networks switch to eHRPD network is significantly reduced.Compared with existing optimization switching, do not completed by LTE and S101 tunnels, significantly reduce the complexity of network.Moreover, also without the protocol stack of modification terminal, reducing the complexity of terminal.In addition, after terminal completes eHRPD network registration, terminal carries out eat dishes without rice or wine session keepalive and subnet exception processes, it can be ensured that terminal will not exit eHRPD login states as needed in LTE Idle state, it is ensured that the validity of eHRPD registrations.Eated dishes without rice or wine conversation information maintenance by preferentially performing eHRPD in LTE Idle state, can avoid producing influence to the ongoing business of LTE network, improve service quality, improve Consumer's Experience.Referring to Figure 10, the embodiment of the present invention additionally provides a kind of base station, positioned at LTE network, can include：

Message generating module 1001, for generating message, the message indicates the registration for allowing terminal to carry out eHRPD network；Sending module 1002, for sending the message that message generating module 1001 is generated to the terminal for residing in LTE network, indicates the registration for allowing terminal to carry out eHRPD network, so that terminal eats dishes without rice or wine to carry out the registration of eHRPD network by eHRPD.

Above-mentioned base station provided in an embodiment of the present invention passes through instruction terminal, it is allowed to which terminal carries out the registration of eHRPD network so that terminal can complete the registration of eHRPD network, greatly reduce before generation LTE network to the switching of eHRPD network The business interruption time that LTE network switches to eHRPD network.The embodiment of the present invention additionally provides a kind of gateway, positioned at eHRPD network, can include：

Tunnel building module, when being switched to eHRPD networks for completing registration and decision from LTE network to eHRPD network when terminal, sets up proxy mobile IP tunnel, terminal is completed to the switching of eHRPD network by proxy mobile IP tunnel.

Further, referring to Figure 11, above-mentioned gateway can also include：

Receiving module 1101, for receiving terminal in the registration process for carrying out eHRPD network, equipment vendor's extended network control protocol VSNCP configuration request messages of transmission；

Correspondingly, tunnel building module 1102 specifically can be used for judging whether the content of the type of attachment field carried in the VSNCP configuration request messages that receiving module 1101 is received is registration, if, the proxy mobile IP tunnel to grouped data network gateway P-GW is then set up not in the registration process, when the registration and decision that terminal is completed from LTE network to eHRPD network are switched to eHRPD network, set up P-GW proxy mobile IP tunnel, terminal is completed to the switching of eHRPD network by proxy mobile IP tunnel, otherwise, handled accordingly according to the content of type of attachment field.

Above-mentioned gateway provided in an embodiment of the present invention is by judging type of attachment field, proxy mobile IP tunnel is not set up when the field is registration, it can realize when terminal carries out eHRPD network registration, do not set up proxy mobile IP tunnel, so that terminal is when being switched to eHRPD network, the business interruption time of switching highly shortened.Referring to Figure 12, the embodiment of the present invention additionally provides a kind of eAN, positioned at eHRPD network, and the eAN can include at least one of following three kinds of modules：

Eat dishes without rice or wine session keepalive module 1201; for being completed when terminal after the registration from Long Term Evolution LTE network to eHRPD network; transmission eats dishes without rice or wine session keepalive request message to terminal, and receiving terminal is according to the instruction of LTE network side and the session keepalive response message of eating dishes without rice or wine of the state return of itself；

Subnet exception processes module 1202, for completing the registration from LTE network to eHRPD network when terminal, and detect after the subnet in eHRPD network changes, the eAN for the targeted subnet being currently located as terminal judge itself whether be source subnet before subnet change where terminal eAN, if, then give terminal distribution one access terminal unicast mark UATI, otherwise, eated dishes without rice or wine session information from the eAN of source subnet migration eHRPD, and to one UATI of terminal distribution, it is then sent to end

¾ ;

Traffic Channel sets up module 1203, for receiving terminal the connection request message sent after eHRPD network in eHRPD network is switched in judgement, according to connection request message judge terminal access terminal unicast mark UATI in Subnet Identification whether the mark for being eAN, if, then Traffic Channel Assignment message is sent to terminal, Traffic Channel is set up for terminal, otherwise Subnet Identification in UATI determines the source eAN of terminal, and the session information of eating dishes without rice or wine of terminal is obtained from source eA, then send access terminal unicast to terminal and identify assignment message and Traffic Channel Assignment message, the UATI of more new terminal, and Traffic Channel is set up for terminal.

Figure 12 is illustrated so that eAN includes above three module as an example, in actual applications, and eAN can also only include any one or any two in above three module.

Above-mentioned eAN provided in an embodiment of the present invention is by carrying out eat dishes without rice or wine session keepalive processing and subnet exception processes, it can be ensured that terminal will not exit eHRPD login states, it is ensured that the validity of eHRPD registrations；The conversation shift of eating dishes without rice or wine of terminal is carried out according to the UATI of terminal, can realize terminal from LTE network be switched to eHRPD network when, eated dishes without rice or wine session negotiation without re-starting eHRPD, also do not require that terminal carries out subnet exception processes at once when LTE activated states detect the change of eHRPD network subnet.Referring to Figure 13, the embodiment of the present invention additionally provides a kind of network system, can include：

Terminal 1301, for when itself resides in LTE network, eated dishes without rice or wine to carry out the registration of eHRPD network by eHRPD according to the instruction of LTE network, then connection of eating dishes without rice or wine is set up, and proxy mobile IP tunnel of the eHRPD network foundation from HSGW to P-GW is triggered, proxy mobile IP tunnel is used to complete switching of the terminal from LET network to eHRPD network；

Base station 1302, positioned at LTE network, for when terminal resides in LTE network, sending messages to terminal, indicates the registration for allowing terminal to carry out eHRPD network, specifically, the base station can be eNodeB;

High-rate packet data services gateway HSGW 1303, positioned at eHRPD network, when being switched to eHRPD network for completing registration and decision from LTE network to eHRPD network when terminal, the proxy mobile IP tunnel for itself arriving P-GW is set up, terminal is completed to the switching of eHRPD network by proxy mobile IP tunnel.

Further, said system can also include：EAN, positioned at eHRPD network, the eAN at least includes one kind in following three kinds of modules：

Eat dishes without rice or wine session keepalive module; for being completed when terminal after the registration from LTE network to eHRPD network; transmission eats dishes without rice or wine session keepalive request message to terminal, and receiving terminal is according to the instruction of LTE network side and the session keepalive response message of eating dishes without rice or wine of the state return of itself；

Subnet exception processes module, for completing the registration from LTE network to eHRPD network when terminal, and after the subnet detected in eHRPD networks changes, the eAN for the targeted subnet being currently located as terminal judge itself whether be source subnet before subnet change where terminal eAN, if, then give terminal distribution one access terminal unicast mark UATI, otherwise, eated dishes without rice or wine session information from the eAN of source subnet migration eHRPD, and to one UATI of terminal distribution, it is then sent to terminal；Traffic Channel sets up module, is switched to what is sent after eHRPD network in eHRPD network in judgement for receiving terminal Connection request message, according to connection request message judge terminal access terminal unicast mark UATI in Subnet Identification whether the mark for being eAN, if, then Traffic Channel Assignment message is sent to terminal, Traffic Channel is set up for terminal, otherwise, Subnet Identification in UATI determines the source eAN of terminal, and the session information of eating dishes without rice or wine of terminal is obtained from source eAN, then send access terminal unicast to terminal and identify assignment message and Traffic Channel Assignment message, the UATI of more new terminal, and set up Traffic Channel for terminal.

The unit of system of the embodiment of the present invention can be integrated in a device, can also be distributed in multiple devices.Said units can be merged into a unit, can also be further split into multiple subelements.

Said system provided in an embodiment of the present invention passes through before terminal is switched to eHRPD network, carry out the registration of eHRPD network, before generation LTE network to the switching of eHRPD network, complete eHRPD eat dishes without rice or wine session negotiation, ppp negotiation and EAP-AKA authentication, the switching that eHRPD is eated dishes without rice or wine to connect and carried out proxy mobile IP tunnel is only set up in switching, the business interruption time that LTE network switches to eHRPD network is significantly reduced.Compared with existing optimization switching, do not completed by LTE and S101 tunnels, significantly reduce the complexity of network.Moreover, also without the protocol stack of modification terminal, reducing the complexity of terminal.In addition, after terminal completes eHRPD network registration, terminal carries out eat dishes without rice or wine session keepalive and subnet exception processes, it can be ensured that terminal will not exit eHRPD login states as needed in LTE Idle state, it is ensured that the validity of eHRPD registrations.Eated dishes without rice or wine conversation information maintenance by preferentially performing eHRPD in LTE Idle state, can avoid producing influence to the ongoing business of LTE network, improve service quality, improve Consumer's Experience.

Through the above description of the embodiments, those skilled in the art can be understood that the present invention can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, or the combination of the two is implemented.Understood based on such, the part that technical scheme substantially contributes to prior art in other words can be embodied in the form of software product, the software module or computer software product can be stored in a storage medium, including some instructions are to cause a computer equipment（Can be personal computer, server, or network equipment etc.）Perform the method described in each embodiment of the invention.Storage medium can be random access memory（RAM), internal memory, read-only storage（ROM), any other form of storage medium known in electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.

Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.

Claims (15)

1. Claims

   1. a kind of method for switching network, it is characterised in that applied to Long Term Evolution LTE networks and the High Rate Packet Data eHRPD network of evolution, including：

   The lateral terminal of the LTE network sends message, indicates the registration for allowing the terminal to carry out eHRPD network；When the terminal is switched to the eHRPD networks by the eHRPD registrations and decision for eating dishes without rice or wine to be accomplished to the eHRPD network, the eHRPD network sides are set up from high-rate packet data services gateway HSGW to grouped data network gateway P-GW proxy mobile IP tunnel, and the terminal is completed to the switching of the eHRPD network by the proxy mobile IP tunnel.

   2. method for switching network according to claim 1, it is characterised in that methods described also includes：

   In the registration process that the terminal carries out eHRPD network, the high-rate packet data services gateway HSGW of the eHRPD network side receives the request message that the terminal is sent；

   The HSGW judges whether the type of attachment field carried in the request message is registration, if it is, the HSGW sets up the proxy mobile IP tunnel to grouped data network gateway not in the registration process.

   3. method for switching network according to claim 1, it is characterised in that methods described also includes：

   After the terminal is accomplished to the registration of eHRPD network, the access network eAN of the evolution of the eHRPD network side, which is sent, eats dishes without rice or wine session keepalive request message to the terminal；

   The eAN receives the meeting i keep-alive response messages of eating dishes without rice or wine that the terminal is returned according to the instruction and the state of itself of the LTE network side.

   4. method for switching network according to claim 1, it is characterised in that methods described also includes：

   When the terminal is accomplished to the registration of eHRPD network, and after the subnet detected in the eHRPD network changes, the UATI is sent to the terminal by the eAN for the targeted subnet that the terminal is currently located to described one access terminal unicast mark UATI of terminal distribution.

   5. method for switching network according to claim 1, it is characterised in that the eHRPD networks side is set up before proxy mobile IP tunnel, in addition to：

   The eAN of the eHRPD network side receives the connection request message that the terminal is sent in the eHRPD network；The eAN judges whether the Subnet Identification in the access terminal unicast mark of the terminal is the mark of itself according to the connection request message；

   If it is, the eAN sends Traffic Channel Assignment message to the terminal, it is that the terminal sets up Traffic Channel；Otherwise, the Subnet Identification during the eAN is identified according to the access terminal unicast determines the source eAN of the terminal, and obtains the session information of eating dishes without rice or wine of the terminal from the source eAN, then sends access terminal unicast to the terminal and identifies assignment message With Traffic Channel Assignment message, the access terminal unicast mark of the terminal is updated, and Traffic Channel is set up for the terminal.

   6. a kind of terminal, it is characterised in that including：

   Registering modules, for when the terminal resides in Long Term Evolution LTE network, being eated dishes without rice or wine to carry out the registration of eHRPD network by the High Rate Packet Data eHRPD of evolution according to the instruction of the LTE network；

   Trigger module, for after the Registering modules complete registration and the terminal determines to be switched to the eHRPD network, foundation eats dishes without rice or wine to connect, trigger the eHRPD network to set up from high-rate packet data services gateway HSGW to grouped data network gateway P-GW proxy mobile IP tunnel, the terminal is completed from the LTE network to the switching of the eHRPD network by the proxy mobile IP tunnel.

   7. terminal according to claim 6, it is characterised in that the Registering modules include：

   First registering unit, if the terminal for residing in LTE network receives the message of LTE network side, and indicate to allow to be registered to eHRPD network in the message, then when the terminal is LTE Idle state, it is switched to eHRPD patterns and eats dishes without rice or wine to carry out the registration of eHRPD network by eHRPD；

   Or,

   Second registering unit, if the terminal for residing in LTE network receives the message of LTE network side, and indicate to allow to be registered to eHRPD networks in the message, then when the terminal is LTE Idle state or LTE activated states, eat dishes without rice or wine to carry out the registration of eHRPD network by eHRPD.

   8. terminal according to claim 6, it is characterised in that also include：

   Connection establishment module, for in the registration process that the terminal carries out eHRPD network, request message is sent to eHRPD network side, packet data network connection is set up in request, when the content of the type of attachment field carried in the request message is registration, it indicates that the high-rate packet data services gateway HSGW in the eHRPD network is not used in setting up the proxy mobile IP tunnel from the HSGW to grouped data network gateway P-GW in the registration process.

   9. terminal according to claim 6, it is characterised in that the terminal also includes：

   First eats dishes without rice or wine session keepalive module; for after the registration that the terminal carries out eHRPD network; when the terminal receive evolution access network eAN send eat dishes without rice or wine session keepalive request message when; if being designated as allowing to be registered to eHRPD network in the message for the LTE network side that the terminal is currently received, the terminal carries out session keepalive processing of eating dishes without rice or wine；

   Or,

   Second eats dishes without rice or wine session keepalive module; for after the registration that the terminal carries out eHRPD network; when the terminal receive to iJ eAN send eat dishes without rice or wine session keepalive request message when; if being designated as allowing to be registered to eHRPD network in the message for the LTE network side that the terminal is currently received; then the terminal judges the state of itself; if LTE Idle state; then carry out session keepalive processing of eating dishes without rice or wine; if LTE activated states; then judge whether to reach default keep-alive time-out time; if it is, carrying out Eat dishes without rice or wine session keepalive processing, otherwise, mark is set, indicated when the terminal enters LTE Idle state, then the session keepalive processing that eat dishes without rice or wine.

   10. terminal according to claim 6, it is characterised in that the terminal also includes：

   Subnet exception processes module, for after the registration that the terminal carries out eHRPD network, when the subnet that the terminal is detected in the eHRPD network changes, if being designated as allowing to be registered to eHRPD network in the message for the LTE network side that the terminal is currently received, then when the terminal is LTE Idle state, access terminal unicast mark is carried out to update, or when the terminal is LTE activated states, access terminal unicast mark is carried out during eHRPD network is switched to and is updated.

   11. terminal according to claim 6, it is characterised in that the terminal also includes：

   Peer to peer session maintenance module, for after the registration that the terminal carries out eHRPD network, when the terminal, which receives the peer to peer session from high-rate packet data services gateway, detects message, if the terminal is in the LTE network, the peer to peer session detection message is not responding to.

   12. a kind of gateway, it is characterised in that positioned at the High Rate Packet Data eHRPD network of evolution, the gateway includes：Receiving module, the request message sent for receiving terminal in the registration process for carrying out eHRPD network；

   Tunnel building module, whether the content of the type of attachment field for judging to carry in the request message that the receiving module is received is registration, if, the proxy mobile IP tunnel to grouped data network gateway P-GW is then set up not in the registration process, when the terminal completes to be switched to the eHRPD network to the registration of the eHRPD network and decision from the LTE network, the proxy-mobile IP tunnel of the P-GW is set up, the proxy-mobile IP tunnel completes the terminal to the switching of the eHRPD network.

   13. a kind of network system, it is characterised in that including：

   Terminal, for when itself residing in Long Term Evolution LTE networks, eated dishes without rice or wine to carry out the registration of eHRPD network by eHRPD according to the instruction from the LTE networks, set up with the eHRPD network eat dishes without rice or wine be connected, triggering eHRPD networks foundation is from high-rate packet data services gateway HSGW to grouped data network gateway P-GW proxy mobile IP tunnel；Base station, positioned at the LTE networks, for sending message to the terminal, indicates the registration for allowing the terminal to carry out eHRPD networks；

   High-rate packet data services gateway HSGW, positioned at the eHRPD network, for being completed when the terminal from described

   LTE network to the eHRPD network registration when, set up the proxy mobile IP tunnel to grouped data network gateway P-GW, the terminal completed from the LTE network to the switching of the eHRPD network by the proxy mobile IP tunnel.

   14. network system according to claim 13, it is characterised in that the system also includes：The access network eAN of evolution, positioned at the eHRPD network；

   The eAN at least includes one kind in following three kinds of modules： Eat dishes without rice or wine session keepalive module; for being completed when terminal from LTE network to after the registration of the eHRPD network; session keepalive request message of eating dishes without rice or wine is sent to the terminal, the session keepalive response message of eating dishes without rice or wine that the terminal is returned according to the instruction and the state of itself of the LTE network side is received；

   Subnet exception processes module, for being completed when terminal from LTE network to the registration of the eHRPD network, and after the subnet detected in the eHRPD network changes, the UATI is sent to the terminal by the eAN for the targeted subnet being currently located as the terminal to described one access terminal unicast mark UATI of terminal distribution；

   Traffic Channel sets up module, for receiving terminal the connection request message sent after the eHRPD network in the eHRPD network is switched in judgement, according to the connection request message judge the terminal access terminal unicast mark UATI in Subnet Identification whether the mark for being the eAN, if, then Traffic Channel Assignment message is sent to the terminal, Traffic Channel is set up for the terminal, otherwise, Subnet Identification in the UATI determines the source eAN of the terminal, the session information of eating dishes without rice or wine of the terminal is obtained from the source eAN, access terminal unicast mark assignment message and Traffic Channel Assignment message are sent to the terminal, update the UATI of the terminal, Traffic Channel is set up for the terminal.

   15. network system according to claim 13, it is characterised in that the base station includes：

   Message generating module, for generating message, the message indicates the registration for the High Rate Packet Data eHRPD networks for allowing terminal to carry out evolution；

   Sending module, message for sending from the message generating module generation to the terminal for residing in the LTE network, the registration of High Rate Packet Data eHRPD network for allowing the terminal to carry out evolution is indicated, so that the terminal eats dishes without rice or wine to carry out the registration of the eHRPD network by eHRPD.