CN102917420A - Communication system, mobility management entity, base station and switching method for public land mobile network - Google Patents
Communication system, mobility management entity, base station and switching method for public land mobile network Download PDFInfo
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- CN102917420A CN102917420A CN201110221235XA CN201110221235A CN102917420A CN 102917420 A CN102917420 A CN 102917420A CN 201110221235X A CN201110221235X A CN 201110221235XA CN 201110221235 A CN201110221235 A CN 201110221235A CN 102917420 A CN102917420 A CN 102917420A
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Abstract
The invention relates to a switching method for a public land mobile network. The method includes: a base station receives PLMN (public land mobile network) priority information, sent by an MME (mobility management entity), of UE (user equipment); the base station determines a target PLMN of the UE according to the PLMN priority information of the UE; and the base station switches the UE which is serviced by the base station and in a connected state to the target PLMN of the UE. The invention further relates to the base station, the mobility management entity and a communication system. Trans-PLMN selection can be realized through PLMN switching to adjust attachment cells of the UE, and consequently current and future complex network topology can be met.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of implementation method of switching public land mobile communication network.
Background technology
Public land mobile communication network (Public Land Mobile Network, abbreviation PLMN) identification code is by mobile country code (Mobile Country Code, be called for short MCC) and mobile network's identification code (Mobile Network Code is called for short MNC) formation.The country that above-mentioned MCC representative is different, as MCC be 460 represent Chinese.The different operator of above-mentioned MNC representative is as representing respectively by different MNC the operators such as China Mobile, China Telecom or CHINAUNICOM.
In the 3GPP standard, there are the various wireless communication technology such as universal mobile telecommunications system (Universal Mobile Telecommunication System is called for short UMTS), Long Term Evolution (Long Term Evolution is called for short LTE).In the network operation of reality, the PLMN of different operators can support different wireless communication technologys, and also may support simultaneously different wireless communication technologys among the PLMN of same operator.Equally, in order to reduce the networking cost, the PLMN of different operators also may support identical wireless communication technology.For example, wireless communication technology can be shared by a plurality of operators, namely has a plurality of different operators' different PLMN among mobile network.For example, in the LTE network, can be shared by China Telecom, China Mobile and CHINAUNICOM.
Under the scene of arranging net of this complexity, new demand has been proposed for the switching of subscriber equipment (User Equipment, be called for short UE).For example, in a network scenarios, the A of operator provides service respectively with the B of operator in different mobile networks.The mobile network of the A of operator is local cover (can be understood as the coverage less), the mobile network of the B of operator is all standing (can be understood as coverage relatively large), and the mobile network's of the mobile network of the A of operator and the B of operator coverage has common factor.Leave mobile network's the coverage of the described A of operator as the UE of the A of operator after, can roam in mobile network's the coverage of the B of operator.And get back to mobile network's the coverage of the A of operator as above-mentioned UE after, just need to switch as early as possible and get back among the mobile network of the A of operator, to guarantee the Communications service level of high-quality two-forty.
Under above-mentioned network scenarios, the A of operator provides a plurality of mobile network No.s in the mobile network of the A of operator, and the B of operator provides a plurality of mobile network No.s equally in the mobile network of the B of operator.As previously mentioned, because the mobile network is shared by different operators, therefore in a mobile network, have the different mobile network No. that is provided by different operators.For example, in the mobile network that the A of operator provides, the mobile network No. that exists simultaneously the A of operator to provide, and the mobile network No. that provides of other operator (such as the C of operator).That is to say, in the mobile network of the A of operator, can have simultaneously the PLMN of the A of operator and the PLMN of the C of operator.So needs are distinguished local PLMN (Home PLMN is called for short HPLMN) and the equivalent HPLMN thereof of UE, current accessed PLMN (Visit PLMN is called for short VPLMN) and equivalent VPLMN thereof.According to these information, UE just can carry out correct switching.
For example, at Wideband Code Division Multiple Access (WCDMA) (Wideband Code-Division Multiple Access, abbreviation WCDMA) in the wireless communication technique, preference pattern according to PLMN, UE is in start, or when recovering without the area of coverage, PLMN (Register PLMN according to registration, be called for short RPLMN), from 3G subscription identification module (abbreviation usim card) at HPLMN or equivalent HPLMN, user PLMN (User PLMN, be called for short UPLMN) tabulation, the PLMN that search can enter in the PLMN of operator (Operator PLMN the is called for short OPLMN) tabulation.UE need to periodically search for PLMN higher than VPLMN priority among HPLMN or equivalent HPLMN, UPLMN, the OPLMN when roaming state.UE when start, can from usim card, read these PLMN by the Cu interface, can comprise among the above-mentioned PLMN PLMN number and wireless communication technology that this PLMN uses.
Operator may according to the actual needs of networking and operation, allow UE preferably select the network of certain wireless access technology.In addition because the overlay area is different or for other considerations, as solving the telephone traffic peak, may sign roaming agreement permission UE internetwork roaming in the mobile network who provides separately between the operator.Therefore, each operator usually can in the HPLMN of the usim card of its distribution and OPLMN, write HPLMN number and and the various wireless communication technologys supported, and PLMN number and the wireless communication technology of supporting allowing the mobile network of UE roaming.Simultaneously, can also according to the strategy of Home Network operation (such as the wireless access technology of preferential use etc.) and roaming agreement (such as the radio roaming network of preferential use, the wireless access technology of preferential use etc.), carry out prioritization to wireless communication technologys different among the PLMN.
In addition, the user also can be according to the type of used UE, the experience of own service quality to different wireless communication technologys and the factors such as policy (such as rate) of operator, the different wireless communication technology is carried out prioritization, and be kept in the UPLMN tabulation of usim card.
At present, the industry expectation is a kind of strides the implementation that PLMN switches in the situation that UE still keeps being connected with the mobile network, reaches now complicated in the future network topology to satisfy.
Summary of the invention
The changing method of the present invention by a kind of public land mobile communication network is provided, base station, mobile management entity, and communication system have solved in the situation that UE keeps being connected with the mobile network, stride the problem of the switching of PLMN.
For solving the problems of the technologies described above, one aspect of the present invention provides a kind of changing method of public land mobile communication network, comprising:
The base station receives the PLMN precedence information of the user equipment (UE) of mobile management entity MME transmission;
The target P LMN of described UE is determined in described base station according to the PLMN precedence information of described UE; And
Described base station will provide the described UE that is in connection status of service to switch to the target P LMN of described UE by described base station.
Another aspect of the present invention provides a kind of base station, comprising:
Receiving element is for the PLMN precedence information of the user equipment (UE) that receives the mobile management entity MME transmission;
Selected cell is for the target P LMN that determines described UE according to the PLMN precedence information of described UE; And
Switch unit is used for and will will provide the described UE that is in connection status of service to switch to the target P LMN of described UE by described base station.
Again one side of the present invention provides a kind of mobile management entity, comprising:
Memory cell is for the public land mobile communication network PLMN precedence information of storage user equipment (UE); And
Transmitting element is used for the PLMN precedence information of described UE is sent to the base station, so that described base station will provide the described UE that is in connection status of service to switch to the target P LMN of described UE by described base station according to the PLMN precedence information of described UE.
Again one side of the present invention provides a kind of communication system, comprising:
One base station and a mobile management entity MME;
Described mobile management entity MME is used for sending the public land mobile communication network PLMN precedence information of user equipment (UE) to described base station; And
Described base station, for the PLMN precedence information of the described UE that receives described mobile management entity MME transmission, the PLMN precedence information that reaches according to described UE will provide the described UE that is in connection status of service to switch to target P LMN by described base station.
Therefore the present invention realizes striding the selection of PLMN by striding the switching of PLMN, with the residential quarter of adhering to of adjustment UE, thereby so that satisfies present and the in the future network topology of complexity.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or the description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The flow chart of the changing method of the public land mobile communication network that Fig. 1 provides for first embodiment of the invention;
The flow chart of the changing method of the public land mobile communication network that Fig. 2 provides for second embodiment of the invention;
The flow chart of the changing method of the public land mobile communication network that Fig. 3 provides for third embodiment of the invention;
The structural representation of the base station that Fig. 4 provides for fourth embodiment of the invention;
The structural representation of the mobile management entity that Fig. 5 provides for fifth embodiment of the invention;
The structural representation that the communication that Fig. 6 provides for sixth embodiment of the invention provides.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work belongs to the scope of protection of the invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
The adaptable communication system of different embodiments of the invention comprises at least one base station, and at least one mobile management entity (Mobile Management Entity is called for short MME).When above-mentioned base station required that the UE it under switched to target P LMN from the PLMN of current service, above-mentioned base station can be called source base station, and the base station that provides target P LMN to serve can be called target BS.The base station that those skilled in the art will appreciate that the PLMN service that provides different can be different base stations, also can be same base station.For example, source base station can provide different PLMN to serve by a base station from target BS simultaneously, also can provide respectively different PLMN services by two base stations, does not repeat them here.
The changing method of a kind of public land mobile communication network PLMN of first embodiment of the invention comprises as shown in Figure 1:
S101: the base station receives the PLMN precedence information of the user equipment (UE) of mobile management entity MME transmission;
S102: the target P LMN of described UE is determined in described base station according to the PLMN precedence information of described UE;
S103: described base station will provide the described UE that is in connection status of service to switch to the target P LMN of described UE by described base station.
In S101, the base station also can be called source base station, and when source base station and described MME connected, described source base station received the message that comprises described PLMN precedence information that described MME sends.For example, described PLMN precedence information can be arranged in the message that is used for asking to set up initial context that described MME sends to described source base station.For example, the described message of setting up initial context for request can be set up request message (Initial Context Setup Request) for initial context.The precedence information of described PLMN also can be arranged in the message that is used for the UE switching that described MME sends to described source base station.For example, the described message of switching for UE can be handover request message (Handover Request).Set up in request message or the handover request message at above-mentioned initial context, portability switches restriction tabulation (Handover Restriction List) cell, is used to indicate the priority of PLMN.
So-called cell can be one group of information, and above-mentioned information can comprise signal or the data flow that is sent to interface/interface.For example, above-mentioned cell can include service quality (Quality of Service is called for short QoS) definition, and parameter is set up, user's identification code, perhaps other relevant informations.
Can comprise in the above-mentioned switching restriction tabulation cell: the PLMN of current service (Serving PLMN), the equivalent PLMN of the PLMN of current service (Equivalent PLMNs), PLMN entity (PLMN Identity), PLMN precedence information (PLMN priority), forbid tracing area (Forbidden Tracking Area, be called for short Forbidden TA), forbid tracing area number (Forbidden Tracking Area Code, be called for short Forbidden TAC), tracing area number (Tracking Area Code, be called for short TAC), disabled position district (Forbidden Location Area, be called for short Forbidden LA), disabled position region code (Forbidden Location Area Code, be called for short Forbidden LAC), location area code (Location Area Code is called for short LAC).The PLMN of above-mentioned current service can be VPLMN, and the equivalent PLMN of the PLMN of above-mentioned current service can be equivalent VPLMN.
In the present embodiment, above-mentioned precedence information can present with the form of the priority list of PLMN, in the priority list of above-mentioned PLMN, can embody with different numerical value (Value) height of the priority of PLMN.The agreement of formulating according to the operator self of UE or the agreement of signing with other operators, MME can determine the priority of the different PLMN for UE.For example, in the priority list of above-mentioned PLMN, have 0 to 7 and have 8 numerical value altogether.Wherein, priority is to successively decrease successively from 0-7.For example, numerical value 0 can represent HPLMN and equivalent HPLMN thereof, has limit priority.Numerical value 1 can be UHPLMN, and priority-level is lower than numerical value 0.Numerical value 2 can be OHPLMN, and priority-level is lower than numerical value 1.The priority-level of numerical value 7 is minimum in all numerical value.For example, numerical value 7 can represent the PLMN that priority-level is lower than VPLMN or equivalent VPLMN.In the present embodiment, when VPLMN or equivalent VPLMN can't guarantee to provide Communications service and UE also to can not find priority-level to be higher than the PLMN of numerical value 7 representatives to UE, can consider UE is switched to the PLMN of numerical value 7 representatives.
In the present embodiment, in the priority list of described PLMN, can comprise HPLMN, equivalent HPLMN, UPLMN, OPLMN.The priority level of the priority list of above-mentioned PLMN is followed successively by HPLMN or equivalent HPLMN, UPLMN, OPLMN from high to low, respectively can be by numerical value 0, numerical value 0, numerical value 1, numerical value 2 expressions.
In the present embodiment, the indication of each concrete wireless communication technique can be set at identifying information corresponding to each PLMN of the priority list that is arranged in PLMN, thereby so that source base station is when selecting certain wireless communication technique of access, can choose accurately and quickly corresponding target BS, improve the efficient of source base station selection PLMN.
In S102, the PLMN that the above-mentioned target P LMN UE with under the source base station that to be source base station select according to the precedence information of PLMN switches to.In the present embodiment, after above-mentioned target P LMN is the priority level order search from high to low of source base station according to above-mentioned tabulation, the PLMN that preferentially UE is switched to that draws.For example, source base station can first search HPLMN tabulation or equivalent HPLMN, search in order successively UPLMN, and OPLMN again, subsequently the highest PLMN of priority-level that searches is defined as target P LMN.
In S103, source base station is according to the higher PLMN of priority that chooses, and will provide the UE that is in connection status of service to switch to by source base station provides the target P LMN target BS of service, comprising:
Source base station is to UE sending measuring control message; And
UE receives the backward source base station reporting measurement reports of above-mentioned measurement control message.
In the present embodiment, in the above-mentioned measurement control message, comprise need UE to the working form of the measurement target base station that source base station reports (such as wireless communication technique LTE/UMTS/GSM etc.), and measure the relevant informations such as working frequency points of above-mentioned working form.After UE reported the relevant information of target BS to source base station, source base station can switch to UE among the target P LMN, realized striding the switching of PLMN.
Therefore the present embodiment can realize striding the selection of PLMN by the switching of PLMN, with the residential quarter of adhering to of adjustment UE, thereby so that satisfy present and the in the future network topology of complexity.
Second embodiment of the invention provides the changing method of a kind of public land mobile communication network PLMN, comprises in the traffic scene that said method is used: the wireless communication technique that the wireless communication technique that the A of operator provides and the B of operator provide.Wherein, the wireless communication technique that the A of operator provides is LTE and UMTS, and the PLMN of the LTE of the A of operator represents by PLMN-1, and the PLMN of the UMTS of the A of operator is represented by PLMN-2.The wireless communication technique that the B of operator provides is also for LTE and UMTS, and the PLMN of the LTE of the B of operator represents by PLMN-3, and the PLMN of the UMTS of the B of operator is represented by PLMN-4.And the LTE of the A of operator only has local the covering, between the A of operator and the B of operator roaming agreement is arranged.
According to the strategy of the A of operator, B, the UE of the A of operator (hereinafter to be referred as UE) should remain on the LTE network as far as possible when connection status, to guarantee the high-quality QoS of two-forty.In other words, if UE sets up the LTE network connection of the A of operator in the LTE of the A of operator network (PLMN-1), if when leaving the LTE network coverage (PLMN-1) of the above-mentioned A of operator, UE should preferentially switch to the LTE network (PLMN-3) of the B of operator.And when UE left the LTE network (PLMN-3) of the B of operator, UE switched to the LTE network (PLMN-1) of the A of operator as far as possible again according to priority orders.In the time can't switching to the LTE network (PLMN-1) of the A of operator, UE switches to the UMTS network (PLMN-2) of the A of operator according to priority orders, in the time can't switching to the UMTS network (PLMN-2) of the A of operator, UE selects to switch to the UMTS network (PLMN-4) of the B of operator.
According to above-mentioned priority policy, the precedence information of PLMN is as shown in table 1, wherein, for UE, PLMN-1 has limit priority, next be PLMN-3, PLMN-2, PLMN-4 successively, above-mentioned PLMN-1 can regard HPLMN as, and above-mentioned PLMN-2 to PLMN-4 also can regard respectively the equivalent HPLMN of PLMN-1 as.Those skilled in the art will appreciate that in the present embodiment, HPLMN and equivalent HPLMN have according to the strategy of formulating between the A of operator and the B of operator or the agreement signed priority height minute, do not repeat them here.
| Operator/network | PLMN | Numerical priority value |
| The LTE network of the A of operator | PLMN-1 | 0 |
| The UMTS network of the A of operator | PLMN-2 | 2 |
| The LTE network of the B of operator | PLMN-3 | 1 |
| The UMTS network of the B of operator | PLMN-4 | 3 |
Table 1
Suppose that UE connects in the LTE of the B of operator network (PLMN-3), source base station obtains precedence information as shown in table 1 from MME, and the mode that source base station obtains the precedence information of above-mentioned PLMN can with reference to the associated description among the first embodiment, not repeat them here.
As shown in Figure 2, the changing method of the PLMN of second embodiment of the invention comprises:
S201: source base station receives the PLMN precedence information of the UE of MME transmission;
S202: when UE moved to neighbor cell, source base station judged according to above-mentioned PLMN precedence information whether neighbor cell has the target P LMN than the current residing source of UE PLMN higher priority; And
S203: when neighbor cell has target P LMN than the current residing source of UE PLMN higher priority, described source base station will provide the UE of service to switch to described target P LMN by source base station; When neighbor cell during not than the target P LMN of the current residing source of UE PLMN higher priority, UE does not switch, and remains among the PLMN of source.
The S201 of the present embodiment is identical with the S101 method of the first embodiment, does not repeat them here.In the present embodiment, the precedence information of above-mentioned PLMN can be with reference to the precedence information shown in the upper table 1.
In S202, UE moves to neighbor cell and can be understood as the network coverage that UE moves to high priority PLMN.The current residing source PLMN of UE can be understood as the PLMN that service is provided as forward direction UE, also can be understood as VPLMN.Because UE is the equipment of the A of operator, and be in the LTE of the B of operator network (PLMN-3), to connect with source base station and obtain the PLMN precedence information that MME sends.At this moment, according to the precedence information of PLMN, the PLMN that has higher priority than PLMN-3 is the LTE network (PLMN-1) of the A of operator.Therefore UE can preferentially switch among the PLMN-1.
In S203, when neighbor cell was covered by PLMN-1, UE carried out the switching of PLMN, switches to PLMN-1 from PLMN-3, and when neighbor cell was not covered by PLMN-1, UE did not carry out the switching of PLMN, still rested on and carried out communication among the PLMN-3.In the present embodiment, when neighbor cell is covered by high priority PLMN (PLMN-1), trigger the base station sending measuring and control to UE, initiate to switch in order to the actual measured results that the base station sends according to UE.
Therefore the present embodiment can realize striding the selection of PLMN by the switching of PLMN, with the residential quarter of adhering to of adjustment UE, thereby so that satisfy present and the in the future network topology of complexity.
The applied traffic scene of the changing method of the PLMN of the third embodiment of the present invention is with reference to the traffic scene of the second embodiment, and described method comprises as shown in Figure 3:
S301: source base station receives the PLMN precedence information of the UE of MME transmission;
S302: when the service quality of the residential quarter under the source base station of serving UE was lower than threshold value, source base station judged according to above-mentioned PLMN precedence information whether neighbor cell has the target P LMN than the current residing source of UE PLMN higher priority; And
S303: when neighbor cell has target P LMN than the current residing source of UE PLMN higher priority, described source base station will provide the UE of service to switch among the described target P LMN by described source base station; When the target P LMN of the current residing source of the incomparable UE of neighbor cell PLMN higher priority, described source base station will provide the UE of service to switch to than among the low PLMN of described source PLMN priority by described source base station.
The S301 of the present embodiment is identical with the S101 method of the first embodiment, does not repeat them here.In the present embodiment, but the precedence information shown in the precedence information reference table 1 of above-mentioned PLMN.
In S302, described threshold value can be predetermined numerical value.For example, in the present embodiment, the service quality of residential quarter that UE is served in expression is lower than threshold value and can be the triggering of A2 event.The triggering of above-mentioned A2 event refers to, if when UE can not find the current suitable cell that is covered by source PLMN, UE will select to switch to the residential quarter under other equivalent PLMN at random.According to the precedence information of PLMN, UE can at first consider the PLMN that priority is high according to priority-level, considers the PLMN that priority is low again.In the present embodiment, source base station considers that the priority of target P LMN that UE is switched to is followed successively by PLMN-1, PLMN-2, PLMN-4.
In S303, source base station is at first sought the neighbor cell that is covered by PLMN-1, and carries out the switching of PLMN, switches to PLMN-1 from PLMN-3.When source base station did not find the neighbor cell that is covered by PLMN-1, source base station was sought the neighbor cell that is covered by PLMN-2, and is carried out the switching of PLMN according to priority orders, switches to PLMN-2 from PLMN-3.When source base station did not find the neighbor cell that is covered by PLMN-2, source base station was sought the neighbor cell that is covered by PLMN-4, and carries out the switching of PLMN, switches to PLMN4 from PLMN-3.In other words, source base station can be selected PLMN according to the height of priority successively according to the precedence information of PLMN, is used for the switching of UE, at first consider to consider and then than the low target P LMN of source PLMN priority-level than the high target P LMN of source PLMN priority-level.
Therefore the present embodiment can realize striding the selection of PLMN by the switching of PLMN, with the residential quarter of adhering to of adjustment UE, thereby so that satisfy present and the in the future network topology of complexity.
It will be appreciated by those skilled in the art that all or part of of implementation method embodiment can finish by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, the above-mentioned program of stating is carried out the flow process that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Fourth embodiment of the invention provides a kind of base station, and its primary structure can with reference to shown in Figure 4, comprise:
Receiving element 401 is for the PLMN precedence information of the user equipment (UE) that receives the mobile management entity MME transmission;
Wherein, described receiving element 401 also is used for receiving the message that comprises described PLMN precedence information that described MME sends to described base station.
Wherein, described switch unit 403, also be used for when service quality that described UE moves to the network coverage of high priority PLMN or serves the residential quarter under the base station of described UE is lower than threshold value, described base station will provide the described UE that is in connection status of service to switch to described target P LMN by described base station according to described PLMN precedence information.
The action that source base station is carried out described in the changing method of PLMN of described the first to the 3rd embodiment can be realized in described base station, for example, described receiving element 401 can be carried out the action of S101 among the first embodiment, also can carry out the action of S301 among the 3rd embodiment, with the switching by PLMN, the selection of PLMN is striden in realization, adjusts the residential quarter of adhering to of UE, thereby so that satisfies network topology present and that future is complicated.
Fifth embodiment of the invention provides a kind of mobile management entity MME, and its primary structure can with reference to shown in Figure 5, comprise:
Transmitting element 502 is used for described PLMN precedence information is sent to the base station, so that described base station will provide the described UE that is in connection status of service to switch to target P LMN by described base station according to described PLMN precedence information.
Wherein, described transmitting element 502 also is used for comprising that the message of described PLMN precedence information is sent to described base station.
Described MME can realize the action that MME carries out described in the changing method of PLMN of described the first to the 3rd embodiment, for example, described transmitting element 502 can be carried out the action of S102 among the first embodiment, with the switching by PLMN, the selection of PLMN is striden in realization, adjust the residential quarter of adhering to of UE, thereby so that satisfy network topology present and that future is complicated.
Sixth embodiment of the invention provides a kind of communication system, and its primary structure can with reference to shown in Figure 6, comprise:
One base station 601 and a mobile management entity MME 602;
Described MME602 is used for sending the public land mobile communication network PLMN precedence information of user equipment (UE) to described base station 601; And
Described base station 601 is used for receiving the PLMN precedence information that described MME sends, and according to described PLMN precedence information will by described base station 601 provide service be in connection status switch to target P LMN.
Wherein, described base station also is used for receiving the message of the precedence information that comprises described PLMN that described MME sends.
The communication system that the present embodiment provides comprises base station and MME among the first to the 3rd embodiment.Therefore, can realize striding the selection of PLMN by the switching of PLMN, adjust the residential quarter of adhering to of UE, thereby so that satisfy the present complicated in the future network topology that reaches.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.And the module of embodiment can be merged into a module, also can further split into a plurality of submodules.
It will be understood by those skilled in the art that the function that is divided into of apparatus module is divided in the embodiment of the invention, actual concrete structure can be fractionation or the merging of above-mentioned functions module.
The sequence number of above embodiment does not represent the quality of embodiment just to description.
The scheme of the content record of claim also is the protection range of the embodiment of the invention.
Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.
Claims (17)
1. the changing method of a public land mobile communication network PLMN is characterized in that, comprising:
The base station receives the PLMN precedence information of the user equipment (UE) of mobile management entity MME transmission;
The target P LMN of described UE is determined in described base station according to the PLMN precedence information of described UE; And
Described base station will provide the described UE that is in connection status of service to switch to the target P LMN of described UE by described base station.
2. the method for claim 1 is characterized in that, described base station receives the PLMN precedence information of the user equipment (UE) of mobile management entity MME transmission, comprising:
In the process that described base station and described MME connect, described base station receives the message of the PLMN precedence information that comprises described UE that described MME sends.
3. method as claimed in claim 2 is characterized in that:
The message of the PLMN precedence information that comprises described UE that described MME sends is the message that is used for the UE switching of described MME transmission or the message that is used for asking to set up initial context that described MME sends.
4. such as each described method of claim 1-3, it is characterized in that, also comprise:
In the PLMN precedence information of described UE, local PLMN or equivalent local PLMN have limit priority.
5. such as each described method of claim 1-4, it is characterized in that, described base station will provide the UE that is in connection status of service to switch to the target P LMN of described UE by described base station, comprise:
When the service quality that moves to the network coverage of high priority PLMN or serve the residential quarter under the base station of described UE as described UE was lower than threshold value, described base station provided the UE that be in connection status of service to switch to described target P LMN with described by the base station according to the PLMN precedence information of described UE.
6. a base station is characterized in that, comprising:
Receiving element is for the PLMN precedence information of the user equipment (UE) that receives the mobile management entity MME transmission;
Selected cell is for the target P LMN that determines described UE according to the PLMN precedence information of described UE; And
Switch unit is used for and will will provide the described UE that is in connection status of service to switch to the target P LMN of described UE by described base station.
7. base station as claimed in claim 6 is characterized in that:
Described receiving element also is used for receiving described MME to the message of the PLMN precedence information that comprises described UE of described base station transmission.
8. base station as claimed in claim 7 is characterized in that:
The message that described MME sends is the message that is used for the UE switching of described MME transmission or the message that is used for asking to set up initial context that described MME sends.
9. such as each described base station of claim 6-8, it is characterized in that:
Described switch unit, also be used for when service quality that described UE moves to the network coverage of high priority PLMN or serves the residential quarter under the base station of described UE is lower than threshold value, described base station provides the UE that be in connection status of service to switch to the target P LMN of described UE with described by described base station according to the PLMN precedence information of described UE.
10. a mobile management entity MME is characterized in that, comprising:
Memory cell is for the public land mobile communication network PLMN precedence information of storage user equipment (UE); And
Transmitting element is used for the PLMN precedence information of described UE is sent to the base station, so that
Described base station will provide the described UE that is in connection status of service to switch to the target P LMN of described UE by described base station according to the PLMN precedence information of described UE.
11. mobile management entity MME as claimed in claim 10 is characterized in that, also comprises:
Described transmitting element, also the message for the PLMN precedence information that will comprise described UE is sent to described base station.
12. mobile management entity MME as claimed in claim 11 is characterized in that:
The message that described MME sends is the message that is used for the UE switching of described MME transmission or the message that is used for asking to set up initial context that described MME sends.
13. such as each described mobile management entity MME of claim 10-12, it is characterized in that:
In the precedence information of the PLMN of described UE, local PLMN or equivalent local PLMN have limit priority.
14. a communication system is characterized in that, comprising:
One base station and a mobile management entity MME;
Described mobile management entity MME is used for sending the public land mobile communication network PLMN precedence information of user equipment (UE) to described base station; And
Described base station, for the PLMN precedence information of the described UE that receives described mobile management entity MME transmission, the PLMN precedence information that reaches according to described UE will provide the described UE that is in connection status of service to switch to target P LMN by described base station.
15. communication system as claimed in claim 14 is characterized in that:
In the precedence information of the PLMN of described UE, local PLMN or equivalent local PLMN have limit priority.
16. such as each described communication system of claim 14-15, it is characterized in that, also comprise:
Described base station also is used for receiving the message of the precedence information of the PLMN that comprises described UE that described MME sends.
17. such as each described communication system of claim 16, it is characterized in that:
The message that described MME sends is the message that is used for the UE switching of described MME transmission or the message that is used for asking to set up initial context that described MME sends.
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