CN101291535A - Method and system for terminal to switch among different networks - Google Patents
Method and system for terminal to switch among different networks Download PDFInfo
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- CN101291535A CN101291535A CNA2008100997895A CN200810099789A CN101291535A CN 101291535 A CN101291535 A CN 101291535A CN A2008100997895 A CNA2008100997895 A CN A2008100997895A CN 200810099789 A CN200810099789 A CN 200810099789A CN 101291535 A CN101291535 A CN 101291535A
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Abstract
The invention discloses a switching method and a system for a terminal between different networks, relating to the wireless communication field. The method comprises the following steps that: in the process that the terminal is switched from an HRPD network to an SAE network, an HRPD access network first inquiries the relation between a sector of the configured HRPD network and a community of an SAE network according to information of the current sector of the terminal, obtains community information needed to be accessed when the terminal is switched to the SAE network, and sends the community information to the SAE network and the terminal; the SAE network determines eNB to be accessed by the terminal according to the received community information and informs the eNB of reserving resource; and the terminal accesses the SAE network to complete the switching according to the received community information. The invention also discloses a system for switching between different networks. The technical proposal of the invention ensures that the terminal can quickly access the eNB with the reserved resource, reduce break time of a data link in the process of switching, thereby guaranteeing the immediacy of business.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to changing method and the system of terminal between heterogeneous networks.
Background technology
3GPP (third generation partner program, 3rd Generation Partnership Project) system architecture (SAE of evolution, System Architecture Evolved) by the E-UTRAN (UTRAN of evolution, Evolved Universal Terrestrial Radio Access Network), MME (mobile management unit, Mobility Management Entity), S-GW (gateway, Serving Gateway), P-GW (grouped data network gateway, Packet Data Network Gateway), HSS (home subscriber server, Home Subscriber Server), 3GPP aaa server (3GPP authentication and authorization charging server), PCRF ("Policy and Charging Rules Function, Policy and Charging Rules Function) entity and other support nodes are formed.
Wherein E-UTRAN is the Access Network of SAE system, and inside comprises many eNB (base station of evolution, evolved NodeB); MME is responsible for the processing of mobile management, Non-Access Stratum signaling, user's chain of command related works such as the contextual management of mobile management; S-GW is the accessing gateway equipment that links to each other with E-UTRAN, transmits data between E-UTRAN and PDN GW, and is responsible for pending datas such as paging are carried out buffer memory.P-GW then is the 3GPP EPS (grouping system of evolution, Evolved Packet System) with the borde gateway of PDN (Packet Data Network) network, be responsible for the access of PDN, transmit function such as data between EPS and PDN, P-GW still is a terminal at user's face anchor point that 3GPP inserts and non-3GPP switches between inserting.PCRF obtains business information by Rx interface and operator's IP operation network interface, and it links to each other another side with gateway device in the network, be responsible for initiating the foundation of IP carrying, guarantee the QoS (service quality, Quality of Service) of business datum, and the control of chargeing.
3GPP2 (third generation partner program 2,3rd Generation Partnership Project 2) grouping system (CDMA20001X EV-DO, CDMA20001X Evolution-Data Only) is called High Rate Packet Data HRPD (High Rate Packet Data) again, by HRPD-AN (HRPD Access Network, HRPD Access Network), PDSN (packet data serving node, Packet Data ServingNode), HA (home agent, Home Agent) and other support nodes are formed.PDSN is the accessing gateway equipment that links to each other with HRPD-AN, is responsible for user's mobile management, context management, and between HRPD-AN and HA, transmit data, and be responsible for pending datas such as paging are carried out buffer memory.
The intercommunication of SAE network support and HRPD network (Interworking), the intercommunication framework as shown in Figure 1, the prerequisite that adopts this framework is that SAE and HRPD network belong to an operator together, and perhaps these two networks belong to different operators, trusts agreement but reach between two operators.Wherein, in the intercommunication framework,, rename as HSGW (HRPD gateway, HRPD Serving Gateway) behind the PDSN function upgrading for unified with the SAE network element.When UE switches between two kinds of access technologies, data anchor point P-GW, transfer of data must be passed through 3GPP data gateway P-GW.In order to realize that multimode terminal inserts by different access technologies, newly-increased network element interface has: S101 interface, S103 interface and S2a interface.Now the interface and the function thereof that increase newly because of intercommunication are done necessary elaboration:
The S101 interface: connect MME and HRPD-AN, be terminal intercommunication signaling at pre-registration and when switching to another network, the S101 interface is supported operations such as pre-registration, session management and switching;
S103 interface: provide user's face of two core net to connect, when UE switches, realize forwarding of data between HSGW and the S-GW between two kinds of networks, can set up the tunnel of S103 interface by the S101 interface signaling;
The S2a interface: control channel and bearer service between HSGW and P-GW, adopt the PMIPv6 agreement.
When UE by the HRPD network when the SAE network switches, existing procedure provides in standard, may further comprise the steps, as shown in Figure 2:
201.UE be linked in the HRPD network, for some reason, the HRPD network signal dies down, SAE network signal grow, and the HRPD-AN decision is initiated the switching of UE to the SAE network;
202. after UE receives switching command, send SAE Non-Access Stratum signaling by tunneling mechanism to HRPD-AN and " adhere to request ", this demand signalling is encapsulated among the signaling X;
203.HRPD-AN after receiving signaling X, HRPD sends " direct transferring " signaling to MME, includes HRPD-AN in this signaling for the parameters such as S101 session identification that this UE distributes, and has also encapsulated " adhering to request " signaling;
204. if do not store the contextual information of UE in the SAE network, UE need if store the contextual information of UE in the SAE network, then directly enter step 205 at the access authentication that carries out of SAE network;
205.SAE network obtains again, and the UE position is upgraded, user signing contract information;
206. default bearing is set up, after this step finished, the data channel of core-network side had been set up success;
207.MME send " direct transferring " signaling to HRPD-AN, this signaling has encapsulated " adhering to acceptance " signaling;
208.HRPD-AN give UE by signaling X transmission " adhering to acceptance " signaling;
209.UE send " adhere to and finish " signaling to HRPD-AN by tunneling mechanism;
Give MME 210.HRPD-AN transmit " adhere to and finish " signaling;
211.UE after executing attachment flow, at once wireless channel is switched to E-UTRAN by the HRPD network, after switching was finished, UE was by E-UTRAN signal access network;
212.UE carry out SAE service request flow process;
213.MME send " switching is finished " signaling to HRPD-AN, the notification source system discharges resource;
214.HRPD Internet resources discharge.
By analyzing in the above flow process, find to exist following problem:
After UE executes attachment flow, at once wireless channel is switched to E-UTRAN by the HRPD network, and UE will insert eNB by the E-UTRAN wireless signal, need carry out cell selecting, Frequency Synchronization, other parameters of physical layer are mutual, system message is mutual, steps such as chain of command interacting message, this process can take the long period, thereby can cause the interruption of current business long period.Obtain better performance of handoffs, reduce and switch the influence that the terminal use is brought, need make original flow process at above problem and improving and optimization, guarantee professional real-time.
Summary of the invention
Technical problem to be solved by this invention is changing method and the system of a kind of terminal between heterogeneous networks to be provided, thereby to improve the performance of handoffs of terminal between heterogeneous networks.
In order to address the above problem, the invention provides the changing method of a kind of terminal between heterogeneous networks, comprising:
When terminal from High Rate Packet Data HRPD network to the process that the system architecture SAE of evolution network switches, HRPD Access Network elder generation is according to the information of sector, the current place of described terminal, the corresponding relation of the sector of the HRPD network that the inquiry configured in advance is good and the sub-district of SAE network, obtain the cell information that described terminal will insert when the SAE network switches, and this cell information is sent to SAE network and described terminal;
The network based cell information of receiving of described SAE is determined the base station eNB that terminal will insert, and notifies this eNB reserved resource;
Described terminal inserts the SAE network according to the described cell information of receiving, finishes switching.
Further, said method specifically is divided into following steps:
Carry out by the HRPD network in the SAE network switching process in terminal, described terminal is after described HRPD Access Network initiates to adhere to request, HRPD-AN is according to the information of sector, the current place of terminal, the corresponding relation of the sector of the HRPD network that the inquiry configured in advance is good and the sub-district of SAE network, obtain the cell information that terminal will insert when the SAE network switches, and this cell information is sent to the mobile management unit MME of SAE network by the signaling that direct transfers;
Described MME determines the base station eNB that terminal will insert according to the cell information of receiving, and notifies this eNB reserved resource;
Described HRPD-AN accepts signaling described cell information is sent to terminal by adhering to;
After described terminal executes attachment flow,, insert the SAE network, finish switching according to paid-in described cell information.
Further, said method also can be divided into following steps:
Carry out by the HRPD network in the SAE network switching process in terminal, described terminal is passed through the HRPD Access Network to SAE network pre-registration, perhaps described terminal had inserted the SAE network, then described HRPD Access Network receives that the tracing section updating TAU that described terminal sends asks the sector auxiliary information of back according to described terminal place, the corresponding relation of the sector of the HRPD network that the inquiry configured in advance is good and the sub-district of SAE network, obtain the cell information that described terminal will insert when the SAE network switches, and this cell information is sent to the mobile management unit MME of SAE network by the signaling that direct transfers;
Described MME determines the base station eNB that terminal will insert according to the cell information of receiving, and notifies this eNB reserved resource;
Described HRPD-AN accepts signaling by TAU described cell information is sent to terminal;
After described terminal executes the TAU flow process,, insert the SAE network, finish switching according to paid-in described cell information.
Wherein, described terminal is meant attaching process between described terminal and the MME by the HRPD Access Network to SAE network pre-registration, in described attaching process, does not set up carrying between gateway S-GW in the SAE network and the grouped data network gateway P-GW.
In the said method, the corresponding relation of the sector of the HRPD network that described configured in advance is good and the sub-district of SAE network is kept at HRPD-AN this locality of HRPD network with form, file or database form.
Described cell information comprises this cell ID, the sign of its affiliated eNB and the frequency range ability of the current support of this eNB at least.
Described MME is by the described eNB reserved resource of handoff request message informing.
The invention also discloses the switched system of a kind of terminal between heterogeneous networks, be used for the scene that terminal is switched to the system architecture SAE of evolution network from High Rate Packet Data HRPD network, this system comprises HRPD network and SAE network, wherein:
The HRPD Access Network of described HRPD network, be used for information according to sector, the current place of described terminal, the corresponding relation of the sub-district of the sector of the HRPD network that the inquiry configured in advance is good and the system architecture SAE network of evolution, obtain the cell information that described terminal will insert when the SAE network switches, and this cell information is sent to the MME and the described terminal of described SAE network;
The MME of described SAE network is used for determining the base station eNB that terminal will insert according to the cell information of receiving, and notifies this eNB reserved resource.
The corresponding relation of the sector of the HRPD network that further, configured in advance described in the said system is good and the sub-district of SAE network is kept at HRPD Access Network this locality with form, file or database form.
Wherein, described cell information comprises this cell ID, the sign of its affiliated eNB and the frequency range ability of the current support of this base station eNB at least.
Described HRPD Access Network sends to described MME by adhering to request with described cell information.
Described HRPD Access Network is initiated pre-registration to described SAE network earlier, by tracing section updating TAU request, described cell information is sent to described MME again.
Technical solution of the present invention makes terminal can be linked into the eNB of reserved resource fast, reduces the break time of data link in the handoff procedure, guarantees professional real-time.
Description of drawings
Fig. 1 is the configuration diagram of HRPD-SAE intercommunication;
Fig. 2 is the flow chart that terminal is switched to the SAE network from the HRPD network in the framework shown in Figure 1;
Fig. 3 is the flow chart that terminal is switched to the SAE network from the HRPD network in the embodiment of the invention 1;
Fig. 4 is a terminal pre-registration stage flow chart in the embodiment of the invention 2;
Fig. 5 is the flow chart that terminal is switched to the SAE network from the HRPD network in the embodiment of the invention 2.
Embodiment
Main design of the present invention is, before UE carries out the wireless channel switching, system can know in advance that UE will insert the information of sub-district, determine the eNB that UE will insert according to this cell information, notify this eNB reserved resource, and give UE this cell information report, like this, UE just can omit that other parameters of cell selecting, Frequency Synchronization, physical layer are mutual, system message mutual and operation such as chain of command interacting message, is linked into the eNB that has reserved resource fast, promptly improves performance of handoffs.
Below in conjunction with the drawings and the specific embodiments technical solution of the present invention is described in further detail.
Embodiment 1
A kind of UE of realization carries out the system that network switches, can provide UE to switch to the SAE network fast from the HRPD network, this system architecture is identical with the intercommunication framework of existing support HRPD network and SAE network, as shown in Figure 1, in interconnective HRPD network and the SAE network, the HRPD network further comprises interconnective HRPD-AN and HSGW, and the SAE network further comprises HSS, MME, S-GW and the P-GW that connects successively; Wherein the HRPD-AN of HRPD network links to each other with the MME of SAE network, and the HSGW of HRPD network all links to each other with S-GW, the P-GW of SAE network, and wherein, the difference of above-mentioned network entity and existing network entity is:
HRPD-AN, carry out on the basis of interacting message at MME with the SAE network, increased query function, be that HRPD-AN can search the corresponding relation of the sub-district of the sector of the good HRPD network of configured in advance and SAE network according to current UE place sector auxiliary information, the cell information that can find UE when SAE switches, will insert, and should little information be notified to MME, wherein cell information comprises this cell ID, the sign of its affiliated eNB and the frequency range of the current employing of this eNB at least;
MME carries out on the basis of interacting message at the HRPD-AN with the HRPD network, has increased the function of notice eNB reserved resource, and promptly MME determines the eNB that UE will insert according to the cell information that HRPD-AN sends, and notifies this eNB reserved resource.
In the said system, UE switches to the process of SAE network from the HRPD network, be based on that existing network switching process proposes, at HRPD-AN when MME transmits " adhering to request " signaling, information according to sector, current UE place, the corresponding relation of the sector by the good HRPD network of inquiry configured in advance and the sub-district of SAE network, the sub-district that can find UE when SAE switches, will insert, and in follow-up signaling, give UE with sign and this cell information report of this sub-district, wherein cell information comprises this cell ID at least, the sign of eNB and the frequency range of the current employing of this eNB under it; On the other hand, the cell information that MME sends up according to HRPD-AN is the selected eNB of UE, and notifies this eNB reserved resource; Because UE receives the cell information that HRPD-AN sends, therefore no longer need operations such as sub-district gravity treatment and Frequency Synchronization, can be linked into the eNB of reserved resource fast, realize networking.This process specifically is divided into following steps, as shown in Figure 3:
301.UE be linked in the HRPD network, for some reason, the HRPD network signal dies down, SAE network signal grow, and the HRPD-AN decision is initiated the switching of UE to the SAE network;
302. after UE received switching command, UE sent SAE Non-Access Stratum signaling by tunneling mechanism to HRPD-AN and " adheres to request ", this demand signalling is encapsulated among the signaling X;
303.HRPD-AN receive carry the signaling X that adheres to request after, information according to sector, current UE place, the corresponding relation of the sector by the good HRPD network of inquiry configured in advance and the sub-district of SAE network, the cell information that finds UE when SAE switches, will insert, and this cell information sent to MME by " Direct Transfer (direct transferring) " signaling, wherein, should also include parameter and " adhering to request " signalings such as S101 session identification that HRPD-AN distributes for this UE in " Direct Transfer " signaling;
In this step, the operator that HRPD network and SAE network belong to together, perhaps reach the operator that trusts agreement mutually for two, can be with the sector of HRPD and the good corresponding relation of cell configuration of E-UTRAN, and this corresponding relation is kept at HRPD-AN this locality with forms such as form, file or databases, perhaps in other network element.
304. if do not store the contextual information of UE in the SAE network, UE need carry out access authentication at the SAE network, if store the UE contextual information in the SAE network, then directly carry out step 305;
305.SAE network obtains again, and the UE position is upgraded, user signing contract information;
306.SAE the network default bearing is set up operation, after carrying was set up and finished, the data channel of core-network side was set up successfully;
307.MME from the Direct Transfer information that receives, obtain cell information, the eNB that finds the UE needs to insert according to this cell information, and with this eNB intercommunication " handoff request and reply " signaling, the S1-U tunnel is set up, wherein, MME is by handoff request signaling eNB reserved resource;
308.MME send " Direct Transfer " signaling to HRPD-AN, encapsulated " adhering to acceptance " signaling in this signaling, and carried cell information;
309.HRPD-AN give UE by signaling X transmission " adhering to acceptance " signaling, also carry the cell information that UE need insert among the signaling X;
310.UE send signaling X to HRPD-AN, wherein encapsulated " adhere to and finish " signaling;
311.HRPD-AN transmit " adhere to and finish " signaling to MME;
312.UE after executing attachment flow, according to from adhering to its cell information that will insert of accepting to obtain the signaling, at once wireless channel is switched to E-UTRAN by the HRPD network, after switching was finished, UE was by E-UTRAN signal access network;
313.UE carry out SAE service request flow process;
314.MME send " switching is finished " signaling to HRPD-AN, the notification source system discharges resource;
315.HRPD Internet resources discharge.
Embodiment 2
System architecture and embodiment 1 are identical in this enforcement, be with the difference of embodiment 1,
Carry out on the basis of interacting message at HRPD-AN and MME, complete switching flow is divided into pre-registration stage and switch step, wherein, pre-registration stage, terminal is meant attaching process between described terminal and the MME by HRPD-AN to SAE network pre-registration, in described attaching process, do not set up carrying between S-GW in the SAE network and the P-GW; Switch step, HRPD-AN receives that the TAU request back that terminal is initiated sends the TAU signaling to MME, carries the cell information that UE will insert in this TAU signaling.
In the said system, UE is divided into pre-registration stage and two stages of switch step by the implementation procedure that the HRPD network switches to the SAE network.Wherein, pre-registration stage may not be carried out switching after carrying out immediately, when detection signal reaches the threshold value that needs the formal switching of execution, initiates to switch again.Switch step at first should be carried out TAU (tracking area update, Tracking Area Update), when HRPD-AN transmits " TAU " signaling to MME, need simultaneously according to current sector auxiliary information, the corresponding relation of the sector by the good HRPD network of inquiry configured in advance and the sub-district of SAE network, find UE when SAE switches, will insert the information of sub-district, wherein cell information comprises this cell ID at least, the sign of eNB and the frequency range of the current employing of this eNB under it, and determine the eNB that UE will insert according to this cell information, notify this eNB reserved resource, in addition, HRPD-AN also will be in follow-up signaling, the information of this sub-district is notified to UE, and UE can be linked into the eNB of reserved resource fast according to the cell information that receives.
Below said process is described in further detail, wherein pre-registration stage comprises the steps, as shown in Figure 4:
401.UE be linked in the HRPD network, for some reason, the HRPD network signal dies down, SAE network signal grow, and the HRPD-AN decision is initiated the switching pre-registration of UE to the SAE network;
402. after UE receives the pre-registration order, send SAE Non-Access Stratum signaling by tunneling mechanism to HRPD-AN and " adhere to request ", this demand signalling is encapsulated among the signaling X; Include HRPD-AN in this signaling for the parameters such as S101 session identification that this UE distributes, also encapsulated " adhering to request " signaling;
404. if do not store the contextual information of UE in the SAE network, UE need if store the contextual information of UE in the SAE network, then directly enter next step at the access authentication that carries out of SAE network;
405.SAE network obtains again, and the UE position is upgraded, user signing contract information;
406.SAE the network default bearing is set up, owing to this stage is a registration phase, so needn't set up data channel at this moment between P-GW and the S-GW;
407.MME send " Direct Transfer " signaling to HRPD-AN, this signaling inside has encapsulated " adhering to acceptance " signaling;
408.HRPD-AN give UE by signaling X transmission " adhering to acceptance " signaling;
409.UE send " adhere to and finish " signaling to HRPD-AN by tunneling mechanism;
Give MME 410.HRPD-AN transmit " adhere to and finish " signaling.
Reach when need carrying out the formal threshold value of switching when detecting signal, handoff procedure comprises the steps, as shown in Figure 5:
501.UE register at the SAE network by HRPD-AN, perhaps before once inserted the SAE network, by detection signal strength, decision is formally switched to the SAE network;
502. after UE receives switching command, send " TAU request " by tunneling mechanism to HRPD-AN, this demand signalling is encapsulated among the signaling X;
503.HRPD-AN after receiving signaling X, according to current sector auxiliary information, by corresponding relation by the sub-district of the sector of the good HRPD network of operator's configured in advance and SAE network, the cell information that finds UE when SAE switches, will insert, and cell information sent to MME by " Direct Transfer " signaling, should also include parameter and " TAU request " signalings such as S101 session identification that HRPD-AN distributes for this UE in " Direct Transfer " signaling;
In this step, by the corresponding relation of the sub-district of the sector of the good HRPD network of operator's configured in advance and SAE network, and this corresponding relation is kept at HRPD-AN this locality with the form of form, file or database, perhaps in other network element.
504.MME from receive " Direct Transfer " signaling, obtain cell information, determine the eNB that the UE needs insert according to this cell information, and with this eNB intercommunication " handoff request and reply ", wherein, MME sets up the S1-U tunnel by handoff request notice eNB reserved resource;
505.MME send the bearer update request to S-GW, bind between S-GW and the P-GW, P-GW with data channel by the tangential S-GW of HSGW;
506.MME send " Direct Transfer " signaling to HRPD-AN, encapsulated " TAU acceptance " in this signaling, carry cell information;
507.HRPD-AN send signaling X to UE, carry cell information in this signaling;
508.UE send signaling X to HRPD-AN, wherein encapsulated " TAU finishes " signaling;
Give MME 509.HRPD-AN transmit " TAU finishes " signaling;
510.UE after executing the TAU flow process, the cell information according to HRPD-AN sends switches by the HRPD network wireless channel at once to E-UTRAN, after switching was finished, UE was by E-UTRAN signal access network;
511.UE carry out SAE service request flow process;
512.MME send " switching is finished " signaling to HRPD-AN, the notification source system discharges resource;
513.HRPD Internet resources discharge.
From above-mentioned two enforcements as can be seen,, make its eNB that can be linked into reserved resource fast, the break time of having reduced data link, guarantee professional real-time because the cell information that in advance UE will be inserted sends to UE.Wherein, embodiment 1, optimizes in adhering to the request flow process, determines the eNB that UE will insert in advance, and notifies this eNB reserved resource; And embodiment 2, switching is divided into pre-registration stage and actual the switching two stages, owing to having the time interval between pre-registration and actual the switching, so before actual switch step begins, need to increase the TAU flow process, determine the eNB that UE will insert in advance, and notify this eNB reserved resource.
The present invention also can have in other multiple examples; under the situation that does not deviate from spirit of the present invention and essence thereof; those skilled in the art can make corresponding change and distortion according to the present invention, but these corresponding changes and distortion all should belong within the protection range of the appended claim of the present invention.
Claims (12)
1, the changing method of a kind of terminal between heterogeneous networks is characterized in that, comprising:
When terminal from High Rate Packet Data HRPD network to the process that the system architecture SAE of evolution network switches, HRPD Access Network elder generation is according to the information of sector, the current place of described terminal, the corresponding relation of the sector of the HRPD network that the inquiry configured in advance is good and the sub-district of SAE network, obtain the cell information that described terminal will insert when the SAE network switches, and this cell information is sent to SAE network and described terminal;
The network based cell information of receiving of described SAE is determined the base station eNB that terminal will insert, and notifies this eNB reserved resource;
Described terminal inserts the SAE network according to the described cell information of receiving, finishes switching.
2, the method for claim 1 is characterized in that, this method specifically is divided into following steps:
Carry out by the HRPD network in the SAE network switching process in terminal, described terminal is after described HRPD Access Network initiates to adhere to request, HRPD-AN is according to the information of sector, the current place of terminal, the corresponding relation of the sector of the HRPD network that the inquiry configured in advance is good and the sub-district of SAE network, obtain the cell information that terminal will insert when the SAE network switches, and this cell information is sent to the mobile management unit ME of SAE network by the signaling that direct transfers;
Described MME determines the base station eNB that terminal will insert according to the cell information of receiving, and notifies this eNB reserved resource;
Described HRPD-AN accepts signaling described cell information is sent to terminal by adhering to;
After described terminal executes attachment flow,, insert the SAE network, finish switching according to paid-in described cell information.
3, the method for claim 1 is characterized in that, this method specifically is divided into following steps:
Carry out by the HRPD network in the SAE network switching process in terminal, described terminal is passed through the HRPD Access Network to SAE network pre-registration, perhaps described terminal had inserted the SAE network, then described HRPD Access Network receives that the tracing section updating TAU that described terminal sends asks the sector auxiliary information of back according to described terminal place, the corresponding relation of the sector of the HRPD network that the inquiry configured in advance is good and the sub-district of SAE network, obtain the cell information that described terminal will insert when the SAE network switches, and this cell information is sent to the mobile management unit MME of SAE network by the signaling that direct transfers;
Described MME determines the base station eNB that terminal will insert according to the cell information of receiving, and notifies this eNB reserved resource;
Described HRPD-AN accepts signaling by TAU described cell information is sent to terminal;
After described terminal executes the TAU flow process,, insert the SAE network, finish switching according to paid-in described cell information.
4, as claim 1,2 or 3 described methods, it is characterized in that,
The corresponding relation of the sector of the HRPD network that described configured in advance is good and the sub-district of SAE network is kept at HRPD-AN this locality of HRPD network with form, file or database form.
5, as claim 1,2 or 3 described methods, it is characterized in that,
Described cell information comprises this cell ID, the sign of its affiliated eNB and the frequency range ability of the current support of this eNB at least.
6, as claim 2 or 3 described methods, it is characterized in that,
Described MME is by the described eNB reserved resource of handoff request message informing.
7, method as claimed in claim 3 is characterized in that,
Described terminal is meant attaching process between described terminal and the MME by the HRPD Access Network to SAE network pre-registration, in described attaching process, does not set up carrying between gateway S-GW in the SAE network and the grouped data network gateway P-GW.
8, the switched system of a kind of terminal between heterogeneous networks is used for the scene that terminal is switched to the system architecture SAE of evolution network from High Rate Packet Data HRPD network, and this system comprises HRPD network and SAE network, it is characterized in that,
The HRPD Access Network of described HRPD network, be used for information according to sector, the current place of described terminal, the corresponding relation of the sub-district of the sector of the HRPD network that the inquiry configured in advance is good and the system architecture SAE network of evolution, obtain the cell information that described terminal will insert when the SAE network switches, and this cell information is sent to the MME and the described terminal of described SAE network;
The MME of described SAE network is used for determining the base station eNB that terminal will insert according to the cell information of receiving, and notifies this eNB reserved resource.
9, system as claimed in claim 8 is characterized in that,
The corresponding relation of the sector of the HRPD network that described configured in advance is good and the sub-district of SAE network is kept at HRPD Access Network this locality with form, file or database form.
10, system as claimed in claim 8 is characterized in that,
Described cell information comprises this cell ID, the sign of its affiliated eNB and the frequency range ability of the current support of this base station eNB at least.
11, as claim 8,9 or 10 described systems, it is characterized in that,
Described HR D Access Network sends to described MME by adhering to request with described cell information.
12, as claim 8,9 or 10 described systems, it is characterized in that,
Described HRPD Access Network is initiated pre-registration to described SAE network earlier, by tracing section updating TAU request, described cell information is sent to described MME again.
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| CN200810099789A CN101291535B (en) | 2008-06-11 | 2008-06-11 | Method and system for terminal to switch among different networks |
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| CN200810099789A CN101291535B (en) | 2008-06-11 | 2008-06-11 | Method and system for terminal to switch among different networks |
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| CN101291535A true CN101291535A (en) | 2008-10-22 |
| CN101291535B CN101291535B (en) | 2012-09-05 |
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| CN200810099789A Expired - Fee Related CN101291535B (en) | 2008-06-11 | 2008-06-11 | Method and system for terminal to switch among different networks |
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