CN101795475A - Method and device for conducting cross-PLMN switching in LTE - Google Patents
Method and device for conducting cross-PLMN switching in LTE Download PDFInfo
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Abstract
The invention relates to a method and a device for conducting cross-PLMN switching in LTE, belonging to the communication field. The invention solves the problem of the prior art that UE cannot be selectively switched to an operator network with higher priority in time when a network area is covered by a plurality of operators. The method comprises that whether cross-PLMN switching is required is judged according to PLMN information of user terminal UE; if the cross-PLMN switching is required, a network node for switching is selected from a target PLMN; and the cross-PLMN switching is conducted according to the network node in the selected target PLMN. The invention has the advantages that the network can select the more proper PLMN network for switching for the user in time according to the subscription information of the user, the expense of the user in mobile service is reduced and the user experience is improved.
Description
Technical field
The present invention relates to the communications field, is a kind of method and device that PLMN switches of striding in LTE concretely.
Background technology
At present in 3GPP (third generation partner program), each active research LTE of manufacturer (Long TermEvolved long-term evolving network)/SAE (System Architecture Evolved System Architecture Evolution network), the purpose of LTE provides a kind of network cheaply that can reduce time delay, raising user data rate, improved power system capacity and covering, use PS (grouping) territory business, bearer network all is the IP carrying.
Generally in the LTE system, the network of an operator (is called Public Land Mobile Network again, Public Land Mobile Network, PLMN) be divided into two parts of core net and Access Network, core network node is by Mobility Management Entity (MME:Mobility Management Entity), gateway (S-GW:Serving Gateway), grouped data network gateway formations such as (P-GW:PDN Gateway), and access network nodes is made up of evolution base station (eNodeB:Evolved NodeB).In the selection/handoff procedure that carries out PLMN, related network node is MME and eNodeB.In order to save the networking cost, realize rationally sharing of Internet resources, the core network node of different operators can share radio access network, specifically, the network node (as eNodeB) of wireless access network not only can be shared by different operators, and can share wireless access resource (as bandwidth, frequency etc.), Here it is multi-operator core network technology of sharing MOCN (Multi-Operator Core Network).
In addition, not only can share wireless network (RAN:Radio AccessNetwork) resource between the different operators, even can share the all-network resource that comprises core network (CN:Core Network) resource, this technology of sharing is called as gateway core network technology of sharing GWCN (GatewayCore Network).
When UE does not carry out network attachment or adheres to until old MME again or be attached under the new situations such as MME, can carry out attachment flow, thereby make UE can use the network service and make network can provide service to UE.
In the LTE/SAE network, the UE that is in connection status enters into the control area of another one target eNode B (Target eNodeB) from a source eNodeB (Source eNodeB) control area, and MME need carry out the switching of the control signaling and the transmission data of X2 interface when not changing.The handoff procedure of X2 interface is divided into handoff preparation phase, handover execution stage and switching and finishes stages three part.Handoff preparation phase mainly is to finish the selection of sub-district/target eNode B, and on target eNode B, carry out resource reservation, in this process, source eNodeB sends measuring command to UE, comprise the Neighboring Cell List that needs UE to measure in this measuring command, the UE return measurement is reported source eNodeB, in the measurement report that source eNodeB provides according to UE about information such as the signal strength signal intensities of neighbor cell and based on the local configuration information of operator, for selecting a target eNode B, UE switches, and send switching command to target eNode B, make target eNode B remain for the resource of switching in advance; Handover execution stage is finished the handoff procedure of eating dishes without rice or wine, and comprises that UE is that UE distributes access channel etc. to synchronous, the Target cell of Target cell; What switch that the stage of finishing mainly carries out is the handoff procedure of the carrying of core net, comprises the renewal process of the beared information that the foundation of the up-downgoing carrying of target eNode B to the S-GW and S-GW initiate to P-GW etc.
When the UE that is in connection status enters into the control area of another one target eNode B from eNodeB control area, a source, if MME changes or the situation of X2 handoff failure under, need carry out the switching of the control signaling and the transmission data of S1 interface.The switching of S1 interface also is divided into handoff preparation phase, handover execution stage and switching and finishes stages three part.Handoff preparation phase of this flow process and X2 switch similar, mainly are the selections (comprising the selection of RAN side gusset eNodeB and/or CN side gusset MME) of carrying out target network node, and carry out the reservation of resource at objective network; The function that handover execution stage and the switching stage of finishing carries out is also switched similar with X2.
Those skilled in the art find that in realizing process of the present invention there is following problem at least in prior art, have such scene: A operator is the LTE network of all standing, B operator is that part hot spot region or dense city have the LTE network therein, zone each automatic network of possibility of both overlapping coverings is independent, the network technology of sharing that also might be to use (MOCN technology of sharing/GWCN technology of sharing).If the user of a B operator begins to quarter at the network of A operator, roam into the network of B operator overlay area afterwards, according to prior art, UE (comprises that X2 switches and S1 switches) when switching, if provide service for the carrier network of UE service can continue as UE, UE only can carry out the switching of PLMN inside.Promptly, if the network's coverage area of A operator is greater than the network's coverage area of B operator, and can improve the service of A operator at the network's coverage area of B operator, UE gets back to the overlay area of the B of home to return to operator from the overlay area of A operator, the switching of PLMN still can not take place.The consequence that causes like this is, UE can not in time switch the carrier network that returns the place, say widely, in network area that a plurality of operators cover (under the situation about being covered by the A of operator, B and C simultaneously) as this hot spot region, UE can not in time select to switch to the network of the operator higher than operator's A priority, thereby has influenced the service to the user.
Summary of the invention
The object of the present invention is to provide a kind of method and device that PLMN switches of striding in LTE, be used for solving the network area that prior art covers in a plurality of operators, UE can not in time select to switch to the problem of the higher carrier network of priority.
In order to solve above-mentioned existing issue, the embodiment of the invention provides a kind of method that Public Land Mobile Network (PLMN) switches of striding, and this method comprises: judge whether that according to the PLMN information of UE needs stride PLMN and switch; Stride PLMN if desired and switch the network node that switches among the select target PLMN; Striding PLMN according to the network node among the described selected target PLMN switches.
In order to solve above-mentioned existing issue, the embodiment of the invention also provides a kind of wireless network node device, and this device comprises: acquiring unit is used to obtain the PLMN information of user terminal UE; Judging unit is used for judging whether that according to described information needs stride PLMN and switch, and notifies selected cell with judged result; Selected cell is used for selecting suitable target network node, and notifying switch unit with the information of target network node when needs are striden the PLMN switching; Switch unit is used for the information of receiving target network node and described portable terminal is striden PLMN switching.
In order to solve above-mentioned existing issue, the embodiment of the invention also provides a kind of core net network node, this device comprises: judging unit is used for PLMN information according to user terminal UE and judges whether that needs stride PLMN and switch, and notifies selected cell with judged result; Selected cell is used for selecting suitable target network node, and notifying switch unit with the information of target network node when needs are striden the PLMN switching; Switch unit is used for the information of receiving target network node and described portable terminal is striden PLMN switching.
The beneficial effect of embodiments of the invention is that network based user's CAMEL-Subscription-Information switches for the user in time selects a more suitable PLMN network, carries out the spending of mobile service thereby reach the minimizing user, improves user experience; And do not need to change significantly existing system, realize that cost is low.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute limitation of the invention.In the accompanying drawings:
Figure 1 shows that the present invention strides the flow chart of PLMN changing method embodiment in LTE;
Figure 2 shows that the flow chart of striding PLMN changing method embodiment when the present invention's objective network in LTE uses the MOCN technology of sharing by source MME control;
The present invention shown in Figure 3 seeks the embodiment flow chart of target MME on the MME of source;
Figure 4 shows that the flow chart of striding PLMN changing method embodiment when the present invention's objective network in LTE uses the MOCN technology of sharing by target MME control;
Figure 5 shows that the present invention seeks the embodiment flow chart of target MME on the eNodeB of source;
Figure 6 shows that target eNode B was controlled the flow chart of striding PLMN changing method embodiment when the present invention UE in LTE carried out the X2 switching;
Figure 7 shows that the present invention seeks the embodiment flow chart of target MME on target eNode B;
Figure 8 shows that target eNode B was controlled the flow chart of striding PLMN changing method embodiment when the present invention UE in LTE carried out the S1 switching;
Figure 9 shows that the present invention wireless network node device example structure figure in LTE;
Figure 10 shows that the structure chart of the present invention core net network node device embodiment in LTE.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer,, the present invention is described in further details below in conjunction with execution mode and accompanying drawing.At this, exemplary embodiment of the present invention and explanation thereof are used to explain the present invention, but not as a limitation of the invention.
Below in conjunction with accompanying drawing the embodiment of the invention is elaborated.
Be illustrated in figure 1 as the present invention strides PLMN changing method embodiment in LTE flow chart.
Comprise step 101, judge whether to stride PLMN according to the PLMN information of user terminal (UE) and switch;
In the described step 101, the PLMN information of user terminal UE can be equivalent public mobile network or home to return to/signatory PLMN tabulation E (H) PLMN list table information, perhaps comprise signatory PLMN (HPLMN) information with this UE, the perhaps IMSI information of UE comprises the HPLMN information of UE in the prefix of this information.
Pass through the above embodiment of the present invention, can determine target P LMN and corresponding wireless network node of this PLMN or core network node according to the PLMN information of UE, thereby find the corresponding provider network of this terminal, so that offer user's better service of this terminal.
Stride the flow chart of PLMN changing method embodiment when being illustrated in figure 2 as the present invention's objective network in LTE and using the MOCN technology of sharing by source MME control.
Present embodiment is applicable to that objective network uses the situation of MOCN technology of sharing, be that target eNode B is shared by two or more operators simultaneously, for example shared by A of operator and B, but source MME and target MME belong to A of operator or the B of operator respectively, and source MME has situation about being connected with target eNode B.
Step 201, source eNodeB sends measuring command to UE, the UE reporting measurement reports, source eNodeB is UE select target eNodeB according to measurement report information, and according to network open up mend structure (when for example there are not X2 interface in source eNodeB and target eNode B) or and target eNode B between X2 handoff failure information or based on the configuration of operator, decision triggers the S1 switching flow.
Step 202, source eNodeB sends a handover request to source MME by the S1 interface, comprises the information of the target eNode B that source eNodeB selects and the Routing Area information TAI at Target cell place in this handoff request.
Step 203, the information of target eNode B information that MME basis in source receives and E (H) the PLMN list that preserves when UE is attached to network before or the information of HPLMN or international mobile subscriber identity (IMSI) judge whether to stride the switching of PLMN, and select suitable target MME to switch in needs.
Step 204, source MME transmits handoff request to target MME.
Step 205 is carried out S1 switching flow in the prior art, and UE is switched.
Above-mentioned steps 203 is sought target MME on the MME of source embodiment can specifically comprise flow chart as shown in Figure 3.
Comprise step 301, (as global eNodeB sign: Global eNodeBID) know the situation of arranging net of PLMN of the objective network of switching, promptly this eNodeB is which operator shared (for example PLMN A and PLMN B) to source MME according to the information of the target eNode B that receives.
Step 303, whether judging, the highest PLMN of priority that provides in E (H) the PLMN list table, if having then enter step 304, otherwise enter step 305 if being provided in the PLMN that target eNode B is shared.
The foregoing description is concrete steps of seeking target MME on the MME of source, can be according to MME of Information Selection of the type approval sign indicating number (TAC:Type ApprovalCode) in the Routing Area information (TAI:Tracking AreaIdentity).If do not obtain target MME in above-mentioned steps, promptly in above-mentioned steps 308, target eNode B is not that the HPLMN of UE shares, and then execution in step 310, carry out traditional S1 and switch.Can for, whether source MME needs to change into the MME of UE service by the information decision of target eNode B, if still exist interface between target eNode B and the source MME, source MME need not to reselect MME for UE, otherwise source MME is that UE selects one with target eNode B the MME that is connected to be arranged (composition of TAI comprises PLMNID and TAC two parts according to TAI, in same PLMN, can find unique MME by TAC) as target MME, and transmit handoff request to target MME.
Stride the flow chart of PLMN changing method embodiment when being illustrated in figure 4 as the present invention's objective network in LTE and using the MOCN technology of sharing by target MME control.
Present embodiment is applicable to that objective network uses the situation of MOCN technology of sharing, and source MME and target eNode B situation about not being connected.Under this scene,, stride the decision-making that PLMN switches and to judge by the MME of objective network because source MME does not know the PLMN of the objective network situation of arranging net.
Step 401, source eNodeB sends measuring command to UE, the UE reporting measurement reports, source eNodeB is UE select target eNodeB according to measurement report information, and according to network open up mend structure (for example whether source eNodeB and target eNode B exist X2 interface) or and target eNode B between the X2 handoff failure or based on the configuration of operator, decision triggers the S1 switching flow.
Step 402, source eNodeB sends a handover request to source MME by the S1 interface, comprises the information of the target eNode B that source eNodeB selects and the Routing Area information TAI at Target cell place in this handoff request.
Step 403, source MME transmits handoff request to the first target MME, and the first target MME is a MME in source MME tool Existing policies or the objective network selected at random herein.Comprise target eNod in this handoff request
The Routing Area information TAI of the information of eB and Target cell, and being included in the information of E (H) the PLMN list that preserves in the UE attachment flow or the information of HPLMN information or IMSI, this information is used for the switching whether first target MME decision-making needs to stride PLMN.
Step 404, the information of the information of the target eNode B that first target MME basis receives and the information of E (H) PLMNlist or HPLMN (IMSI) judges whether to stride the switching of PLMN, stride the switching of PLMN if desired, and the first target MME itself is not only target network node, and then selecting more suitably, target network node switches.Can adopt as the embodiment flow process of Fig. 3 and seek the second target MME, source MME is wherein replaced by the first target MME.
Step 405, source MME transmits handoff request to the second target MME.
Step 406 is carried out S1 switching flow in the prior art, and UE is switched.
Be illustrated in figure 5 as the present invention seeks target eNode B on the eNodeB of source embodiment flow chart.
In the preparatory stage that X2 switches, comprise after the measurement result that cell signal strength is carried out that source eNodeB receives that UE reports:
Step 502 judges whether the signal strength signal intensity of this PLMN sub-district reaches a predetermined value, if reach then enter step 503, otherwise enters step 504.
Whether step 506, the sub-district of judging HPLMN or the pairing PLMN of IMSI information appear in the measurement report that UE reports, and whether the signal strength signal intensity of this sub-district surpass a predetermined value, if satisfy then enter step 507, otherwise enter step 508.
Before the above-mentioned steps 501, source MME obtains the information of HPLMN/E (H) PLMN list from home to return to client server (HSS), perhaps adheres to acquisition request IMSI information from what UE initiated, in adhering to the request of reception above-mentioned information is issued to source eNodeB; Perhaps UE by a HPLMN/EPLMN list/IMSI information uploading of eating dishes without rice or wine to source eNodeB.
By the scheme of the embodiment of the invention, can stride the switching of PLMN by control on the eNodeB of source.
Be illustrated in figure 6 as the present invention UE in LTE carry out X2 when switching target eNode B control stride the flow chart of PLMN changing method embodiment.
Step 601 is carried out X2 and is switched preparation.
Step 602, source eNodeB sends a handover request to target eNode B, carries HPLMN/E (H) PLMN list/IMSI information in this handoff request, is used for target eNode B and strides the decision-making that PLMN switches.
Step 603, target eNode B judges whether to carry out the PLMN switching according to the information of HPLMN/E (H) the PLMN list/IMSI that receives and the PLMN situation of oneself service.
Step 604, when judged result was switched for carrying out PLMN, target eNode B sent switch failure information to source eNodeB, and carries the cause value of handoff failure, strides PLMN switching etc. as needs, and the sign of carrying target MME.
Step 605, source eNodeB initiates S1 and switches, and sends the S1 handoff request to the target MME that selects according to the MME sign that receives in the step 603.
Step 606 is carried out S1 switching flow in the prior art, and UE is switched.
Be illustrated in figure 7 as the present invention seeks target MME on target eNode B embodiment flow chart.
Whether comprise step 701, judging, the highest PLMN of priority that provides in E (H) the PLMN list table is provided in the PLMN that target eNode B is shared, if having then enter step 702, otherwise enters step 703.
Step 702 is selected a MME in this PLMN, as the target MME that switches, promptly can this switch as the destination node that switches afterwards.
Step 704 selects to meet a MME among the PLMN of Rule of judgment, as the target MME that switches, promptly can this switch as the destination node that switches afterwards.
LMN if having then enter step 706, otherwise enters step 707.
Step 706 is selected the MME of this PLMN, and the target MME as switching finishes the selection of target eNode B to target MME.
In above-mentioned steps 705, when not having the signatory PLMN information of UE in HPLMN information that target eNode B receives or the IMSI information, but execution in step 707 then promptly do not stride PLMN and switch, switch and only carry out existing X2.Target eNode B is the UE reserved resource, and returns source eNodeB resource reservation state, and eNodeB sends switching command to UE by the source.
Be illustrated in figure 8 as the present invention UE in LTE carry out S1 when switching target eNode B control stride the flow chart of PLMN changing method embodiment.
Step 801, source eNodeB sends measuring command to UE, the UE reporting measurement reports, source eNodeB is UE select target eNodeB according to measurement report information, and according to network open up mend structure (whether having X2 interface) as UE and target eNode B or and target eNode B between the X2 handoff failure or based on the configuration of operator, decision triggers the S1 switching flow.
Step 802, source eNodeB sends a handover request to source MME by the S1 interface, comprises the information of the target eNode B that source eNodeB selects and the Routing Area information TAI at Target cell place in this handoff request.
Step 803, whether source MME needs to change into the MME of UE service by the information decision of target eNode B.If still exist interface between target eNode B and the source MME, source MME need not to reselect MME for UE; If do not have interface between target eNode B and the source MME, source MME is that UE selects one with target eNode B the MME that is connected to be arranged (composition of TAI comprises PLMNID and TAC two parts according to TAI, in same PLMN, can find a unique MME by TAC), and transmit handoff request to the first target MME.The first target MME is a MME in the objective network of source MME selection.
Step 804, first target MME conversion handoff request is to target eNode B, and notification target eNodeB carries out the resource reservation of switch step.In this step, the described first target MME can carry information such as HPLMN/E (H) PLMN/IMSI information to target eNode B, is used for target eNode B and judges whether to stride the PLMN switching at follow-up handoff procedure.
Step 805, target eNode B judges whether to carry out the PLMN switching according to the PLMN situation that the first target MME returns HPLMN/E (H) PLMN/IMSI information and oneself service, and determining step can be identical with the method for Fig. 7 embodiment.When judged result is switched for carrying out PLMN, and the first target MME selects the second target MME when not being optimum target switching node.
Step 806, according to the second target MME, target eNode B sends switch failure information to the first target MME, and carries the cause value of handoff failure, and the sign of carrying the second target MME.
Step 807, the first target MME transmits handoff request to the second target MME according to second target MME sign.
Step 808, the described second target MME carries out S1 switching flow in the prior art, and UE is switched.
Be illustrated in figure 9 as a kind of wireless network node device of the present invention example structure figure, the PLMN that strides that can be implemented among the LTE switches.The wireless network node device can be source eNodeB or target eNode B.
Above-mentioned wireless network node device comprises:
Acquiring unit 901 is used to obtain the PLMN information of user terminal UE;
Judging unit 902 is used for judging whether that according to described information needs stride PLMN and switch, and notifies selected cell with judged result;
When the PLMN of described user terminal UE information is HPLMN or IMSI information, whether be the PLMN that shares with target eNode B according to HPLMN, judge whether to stride PLMN and switch.
As one embodiment of the present of invention, also comprise signal strength detection unit 905, be used for when above-mentioned wireless network node is source eNodeB, the detected cells signal strength signal intensity, and testing result sent to judging unit.Judging unit is then according to the PLMN information of described user terminal UE, and the testing result of above-mentioned cell signal strength judges whether to stride PLMN and switches.When HPLMN is the PLMN that shares with target eNode B, and the testing result of cell signal strength is during greater than preset value, and judged result is switched for striding PLMN.
Be a kind of core net network node device of the present invention example structure figure as shown in figure 10, the PLMN that strides that can be implemented among the LTE switches.The wireless core network network node device can be source MME or target MME.
Above-mentioned core net network node device comprises:
Judging unit 1001 is used for PLMN information according to user terminal UE and judges whether that needs stride PLMN and switch, and notifies selected cell with judged result;
As one embodiment of the present of invention, when the PLMN of described user terminal UE information is E (H) PLMN list table, according to PLMN priority orders in E (H) the PLMN list table, and whether the PLMN that shares with target eNode B is arranged, judge whether to stride PLMN and switch;
When the PLMN of described user terminal UE information is HPLMN or IMSI information, whether be the PLMN that shares with target eNode B according to HPLMN, judge whether to stride PLMN and switch.When HPLMN was the PLMN that shares with target eNode B, judged result was switched for striding PLMN.
The beneficial effect of said apparatus embodiment is, UE under the connection status is when switching, network can switch for the user in time selects a more suitable PLMN network according to user's CAMEL-Subscription-Information, carry out the spending of mobile service thereby reach the minimizing user, improve the purpose of user experience.
Above-described embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is the specific embodiment of the present invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. stride the method that Public Land Mobile Network PLMN switches for one kind, it is characterized in that this method comprises:
Judge whether that according to the PLMN information of user terminal UE needs stride PLMN and switch;
Stride PLMN if desired and switch the network node that switches among the select target PLMN;
Striding PLMN according to the network node among the described selected target PLMN switches.
2. method according to claim 1 is characterized in that, described PLMN information comprises: equivalent public mobile network or home to return to/signatory PLMN tabulation E (H) PLMN list information, with the signatory HPLMN information of this UE, or IMSI information.
3. method according to claim 2, it is characterized in that, the PLMN information of described UE is obtained by wireless network node, describedly judge whether to stride PLMN and switch and to be undertaken by wireless network node, the network node that selection is switched is undertaken by wireless network node, and described wireless network node is source eNodeB or target eNode B; Or
Describedly judge whether to stride PLMN and switch and to be undertaken by core network node, the network node of selecting to switch is undertaken by core network node, and described core network node is source MME or target MME.
4. method according to claim 3 is characterized in that, the PLMN information of described UE is retrieved as by source eNodeB:
Source MME issues HPLMN/E (H) PLMN list/IMSI information and arrives described source eNodeB: or
Described source eNodeB receives HPLMN/E (H) the PLMN list/IMSI information that UE uploads by eating dishes without rice or wine.
5. method according to claim 3 is characterized in that, the PLMN information of described UE is retrieved as by target eNode B:
When carrying out the X2 switching,
Source eNodeB carries described information to described target eNode B by handoff request; Or
The source core network node carries above-mentioned information to described target eNode B by Path Switch Ack;
When carrying out the S1 switching,
Source eNodeB carries described information to the source core network node by handoff request, by target MME described information is delivered to described target eNode B by the source core network node; Or
Target MME carries above-mentioned information to described target eNode B by handoff request.
6. according to claim 3 or 4 described methods, it is characterized in that, obtain under the situation by source eNodeB, describedly judge whether to stride PLMN and switch that the network node of selecting to switch is in the PLMN of described UE information,
Source eNodeB is according to the PLMN priority orders in described E (H) the PLMN list table, and whether the PLMN that shares with target eNode B arranged, seek the PLMN that the highest relatively and cell signal strength of priority surpasses a predetermined value, select suitable target switching node; Or
Source eNodeB judges that according to described HPLMN or IMSI information whether described HPLMN is the PLMN that shares with target eNode B, when this PLMN cell signal strength surpasses a predetermined value, selects suitable target switching node.
7. according to claim 3 or 5 described methods, it is characterized in that, obtain by target eNode B under the situation, describedly judge whether to stride PLMN and switch that the network node of selecting to switch is in the PLMN of described UE information,
PLMN priority orders during target eNode B is shown according to described E (H) PLMN list, and whether the PLMN that shares with target eNode B is arranged, seek priority the highest PLMN relatively, select suitable target switching node; Or
Source eNodeB is according to described HPLMN or IMSI information, judges whether described HPLMN is the PLMN that shares with target eNode B, when described HPLMN be during with the shared PLMN of target eNode B, selects suitable target switching node.
8. method according to claim 3 is characterized in that, judge whether to stride PLMN switch by core network node carry out for,
PLMN priority orders during source MME or target MME show according to described E (H) PLMN list, and whether the PLMN that shares with target eNode B is arranged, select suitable target switching node; Or
Source MME or target MME be according to described HPLMN or IMSI information, judges whether described HPLMN is the PLMN that shares with target eNode B, when this described HPLMN be during with the shared PLMN of target eNode B, selects suitable target switching node.
9. a wireless network node device is characterized in that, this device comprises:
Acquiring unit is used to obtain the PLMN information of user terminal UE;
Judging unit is used for judging whether that according to described information needs stride PLMN and switch, and notifies selected cell with judged result;
Selected cell is used for selecting suitable target network node, and notifying switch unit with the information of target network node when needs are striden the PLMN switching;
Switch unit is used for the information of receiving target network node and described portable terminal is striden PLMN switching.
10. wireless network node device according to claim 9, it is characterized in that when the PLMN of described user terminal UE information is E (H) PLMN list table, according to PLMN priority orders in E (H) the PLMN list table, and whether the PLMN that shares with target eNode B is arranged, judge whether to stride PLMN and switch;
When the PLMN of described user terminal UE information is HPLMN or IMSI information, whether be the PLMN that shares with target eNode B according to HPLMN, judge whether to stride PLMN and switch.
11. wireless network node device according to claim 10 is characterized in that, further comprises, the signal strength detection unit is used for when described wireless network node is source eNodeB, the detected cells signal strength signal intensity, and testing result sent to judging unit;
Described judging unit is according to the PLMN information of described user terminal UE, and described testing result judges whether to stride the PLMN switching.
12. a core net network node is characterized in that, this device comprises:
Judging unit is used for PLMN information according to user terminal UE and judges whether that needs stride PLMN and switch, and notifies selected cell with judged result;
Selected cell is used for selecting suitable target network node, and notifying switch unit with the information of target network node when needs are striden the PLMN switching;
Switch unit is used for the information of receiving target network node and described portable terminal is striden PLMN switching.
13. core net network node according to claim 12, it is characterized in that, when the PLMN of described user terminal UE information is E (H) PLMN list table, according to PLMN priority orders in E (H) the PLMN list table, and whether the PLMN that shares with target eNode B is arranged, judge whether to stride PLMN and switch;
When the PLMN of described user terminal UE information is HPLMN or IMSI information, whether be the PLMN that shares with target eNode B according to HPLMN, judge whether to stride PLMN and switch.
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| CN200910009898A CN101795475A (en) | 2009-02-02 | 2009-02-02 | Method and device for conducting cross-PLMN switching in LTE |
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| CN102917420A (en) * | 2011-08-03 | 2013-02-06 | 华为技术有限公司 | Communication system, mobility management entity, base station and switching method for public land mobile network |
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| CN104025654A (en) * | 2011-11-02 | 2014-09-03 | 瑞典爱立信有限公司 | Plmn selection at handover to a target shared location being shared between core network operators |
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