CN102196531B

CN102196531B - Method and device for selecting core network to be accessed

Info

Publication number: CN102196531B
Application number: CN 201010120083
Authority: CN
Inventors: 陈运涛; 肖伟
Original assignee: Shanghai Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd; Shanghai Huawei Technologies Co Ltd
Priority date: 2010-03-04
Filing date: 2010-03-04
Publication date: 2013-09-11
Anticipated expiration: 2030-03-04
Also published as: CN102196531A

Abstract

The embodiment of the invention discloses a method and a device for selecting a core network to be accessed. The method for selecting the core network to be accessed comprises the following steps of: broadcasting a core network identifier of a shared radio access network (RAN) to user equipment (UE); receiving a core network selection indication message generated and transmitted according to the broadcast core network identifier of the shared RAN from the UE; and judging whether the core network selection indication message carries a home core network identifier or not, and if the core network selection indication message carries the home core network identifier, selecting the core network to be accessed for the UE according to an access control strategy configured in advance by a networkside. By the scheme, the network side can learn that the UE is a roaming user according to the home core network identifier reported by the UE, and further select the core network to be accessed for the UE according to the access control strategy which is configured in advance, thereby realizing the flexible control of an operator over the core network to be accessed by the roaming user.

Description

Select to insert method and the device of core net

Technical field

The present invention relates to communication technical field, particularly relate to method and the device of selecting to insert core net.

Background technology

Mobile communication network is by RAN(Radio Access Network, wireless access network) and CN(Core Network, core net) form.In traditional mobile network's operation mode, each operator runs RAN and CN independently.And in new mobile network's operation mode, a plurality of operators can independent operation CN and share RAN.

Can sign an agreement between the different mobile operator, permission is at the signatory UE(User Equipment of bipartite network, subscriber equipment) can in the network of oneself, insert, when UE inserts in non-signatory carrier network, be that UE is at non-HPLMN(Home Public Land Mobile Network, the ownership Public Land Mobile Network) insert, the UE of this moment is called the roamer.When the roamer inserts, owing to there are a plurality of CN to share this RAN, therefore need to select CN roamer's service for this reason in a shared RAN.

In the prior art, select CN to be finished by UE, the selection result that RAN directly defers to UE is defined as the CN of its service.And UE selects according to the CN sign that RAN broadcasts again.For GSM network or UMTS network, shared RAN can only broadcast CN sign, if roamer's signatory operator does not have and the CN operator that is broadcasted signs an agreement, then the roamer can't insert in this shared RAN.For the LTE network, can broadcast a plurality of CN signs although share RAN, final CN selection result still needs to depend on the selection strategy of UE self, and network side can't be controlled it.

Summary of the invention

For solving the problems of the technologies described above, the embodiment of the invention provides method and the device of selecting to insert core net, and when UE roams to when sharing RAN, network side can be selected control to the core net that UE inserts.The technical scheme of the embodiment of the invention is as follows:

The embodiment of the invention provides a kind of method of selecting to insert core net, comprising:

Core net sign to user equipment (UE) broadcasting share wireless access network RAN;

Receive described UE and select Indication message according to the core net that the core net of described shared RAN sign generates and sends, described core net is selected to carry in the Indication message suggestion and is inserted the core net sign;

Judge in the described core net selection Indication message, whether carry the homing core network mark and know, if, then

Homing core network mark according to described UE is known, and is that described UE selects to insert core net in the core net of sharing RAN;

If described core net is selected in the Indication message, do not carry the homing core network mark and know, then will insert the corresponding core net of core net sign with described suggestion, be defined as the access core net of described UE.

The embodiment of the invention also provides a kind of network equipment, comprising:

Core net identification of broadcast unit is used for the core net sign to user equipment (UE) broadcasting share wireless access network RAN;

The Indication message receiving element, for receiving the core net selection Indication message that the core net sign of described UE according to described shared RAN generates and sends, described core net selects to carry in the Indication message suggestion access core net sign;

Judging unit is used for judging described core net selection Indication message, whether carries the homing core network mark and knows;

First selected cell is used in the judged result of described judging unit knowing according to the homing core network mark of described UE when being, be described UE selection access core net in the core net of sharing RAN;

Second selected cell is used in the judged result of described judging unit will inserting the corresponding core net of core net sign with described suggestion for not the time, is defined as the access core net of described UE.

The embodiment of the invention also provides a kind of subscriber equipment, comprising:

Core net sign receiving element is used for receiving the core net sign of the shared wireless access network RAN that network side broadcasts;

The Indication message transmitting element, be used for working as the core net that receives and identify the homing core network mark knowledge that does not comprise described UE, or the registration core net that comprises described UE in the core net that the receives sign identifies, and should registration core net sign know not simultaneously with the homing core network mark of described UE, described homing core network mark knowledge is carried on core net to be selected to send to network side in the Indication message, described core net selection Indication message is used to indicate network side and selects inserting core net, wherein said core net is selected in the Indication message, also carries described UE and identifies a selected suggestion according to the core net of the shared RAN that broadcasts and insert the core net sign;

Wherein, when described core net was selected to carry the knowledge of homing core network mark in the Indication message, the indication network lateral root was known according to the homing core network mark of described UE, was that described UE selects to insert core net in the core net of sharing RAN; If described core net is selected in the Indication message, do not carry the homing core network mark and know, then the indication network side will insert the corresponding core net of core net sign with described suggestion, be defined as the access core net of described UE.

Use the technical scheme that the embodiment of the invention provides, network side identifies to the core net that UE broadcasts a plurality of shared RAN, and UE can select one of them to report network side in a plurality of core net signs of broadcasting.For roaming UE, also the homing core network mark of self can be known simultaneously and also report network side, network side is known according to the homing core network mark that UE reports, can learn that this UE belongs to the roamer, and then the information that can report according to UE and pre-configured Access Control Policy, for UE selects to insert core net, thereby realize that operator inserts the flexible control of core net to the roamer.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do simple the introduction to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is a kind of method flow diagram of selecting to insert core net of the embodiment of the invention;

Fig. 2 is the network diagram of the shared RAN of the embodiment of the invention;

Fig. 3 is the method flow diagram that UE selects to insert core net for embodiment of the invention network side;

Fig. 4 is the structural representation of the network equipment of the embodiment of the invention;

Fig. 5 is the another kind of structural representation of the network equipment of the embodiment of the invention;

Fig. 6 is the structural representation of the subscriber equipment of the embodiment of the invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.

Figure 1 shows that a kind of method of selecting to insert core net that the embodiment of the invention provides, may further comprise the steps:

S101, network side is to the core net sign of UE broadcasting share RAN;

Present embodiment describes with the LTE network, and mobile core network is with PLMN(Public Land Mobile Network, Public Land Mobile Network) expression, corresponding core net sign is called PLMN ID; MME(Mobility Management Entity, Mobility Management Entity) be the functional entity among the PLMN, the eNodeB(evolution base station) be the functional entity among the RAN.Figure 2 shows that the network diagram of a kind of shared RAN, PLMN1 and PLMN2 share same RAN, and the eNodeB among the shared RAN and the MME of two PLMN link to each other, and MME1 belongs to PLMN1, and MME2 belongs to PLMN2.

In the system message of eNodeB broadcasting, comprise the identification information that all share the core net of this RAN.Network configuration as shown in Figure 2, eNodeB can broadcast the ID of PLMN1 and PLMN2 to UE.

S102, the core net sign that UE broadcasts according to network side selects a suggestion to insert the core net sign;

UE can obtain the ID of PLMN1 and PLMN2 by the broadcast of reading system, and can learn that this RAN shares RAN.

The PLMN ID that UE need broadcast according to network side and the selection strategy of self are selected the PLMN that a preparation inserts and are reported eNodeB.UE can select PLMN according to following selection strategy when access network:

A) the RPLMN(Registered PLMN of search UE, register PLMN) or EPLMN(Equivalent PLMN, reciprocity PLMN), wherein, RPLMN is the PLMN of the last registration of UE normally, and EPLMN can be that UE carried out being informed in signaling by CN after position renewal and the registration in last time.That is, if in the PLMN of system broadcasts ID, comprise PLMN(or reciprocity PLMN that this UE last time registers) ID, then UE will directly insert this PLMN, if do not search, then carry out following steps b successively)-step f).

B) the HPLMN(Home PLMN of search UE, Home PLMN).

C) the EHPLMN(Equivalent Home PLMN that according to priority sequential search priority is the highest, reciprocity Home PLMN)

D) the self-defining preferred PLMN of search subscriber

E) search received signal level other PLMN more than predetermined strength selects one of them at random.

F) select other PLMN according to the signal strength signal intensity of successively decreasing, if in selection course, there is the signal strength signal intensity of a plurality of PLMN identical, then in the identical PLMN of these a plurality of signal strength signal intensities, select one of them at random.

In the present embodiment, UE can directly use above-mentioned selection strategy, and for the roamer, its concrete selection course is as follows:

User equipment (UE) find the PLMN that broadcasts in the roaming network neither the RPLMN of UE neither UE EPLMN, therefore further execution in step b);

The PLMN that broadcasts in the roaming network can not be the HPLMN of UE yet, therefore further execution in step c);

The PLMN that broadcasts in the roaming network can not be the EHPLMN of UE yet, therefore further execution in step d);

The PLMN that broadcasts in the roaming network can not be user-defined preferred PLMN yet, therefore further execution in step e); That is to say, for the roamer, can search for received signal level other PLMN more than predetermined strength, select one of them at random; Perhaps select other PLMN according to the signal strength signal intensity of successively decreasing, if in selection course, there is the signal strength signal intensity of a plurality of PLMN identical, then in the identical PLMN of these a plurality of signal strength signal intensities, select one of them at random.

Be that two PLMN share RAN in network shown in Figure 2, two PLMN ID are broadcasted simultaneously, the signal strength signal intensity that UE records two PLMN is normally identical, therefore no matter be execution in step e) (signal strength signal intensity is greater than predetermined strength), or execution in step f) (signal strength signal intensity is less than predetermined strength), UE can select one at random in two PLMN ID.

Through step a)-step f), UE will determine the PLMN ID that a preparation reports eNodeB, in the present embodiment, this final result who selects will be called suggestion PLMN ID, i.e. suggestion inserts the core net sign.

S103, UE sends core net to network side and selects Indication message, and described core net is selected in the Indication message, carries suggestion and inserts the core net sign;

UE is carried on core net with determined suggestion PLMN ID and selects to send to eNodeB in the Indication message.For roaming UE, in sending to eNodeB core net selection Indication message, also to carry the HPLMN ID of this UE, in the practical application scene, specifically can comprise: one, UE is when access network, in current network, searched the PLMN that once successfully registered on it, namely searched RPLMN, but found that by comparing PLMN ID the HPLMN of this RPLMN and this UE preservation is inconsistent, this moment, UE was in sending to core net selection Indication message, carry the HPLMN ID that preserves before this UE; Two, UE had not both searched RPLMN and had not searched HPLMN yet when access network in current network, this moment, UE was in sending to core net selection Indication message, also will carry the HPLMN ID that preserves before this UE.

Core net selects Indication message the indication network side to be selected by the access core net of UE, it will be understood by those skilled in the art that, it can be the various message of stipulating in the existing protocol that core net is selected Indication message, that is to say, suggestion PLMN ID and HPLMN ID can be carried in these protocol messages, thereby realize selecting the Indication message identical functions with core net.For example: set up RRC(Radio Resource Control at UE and eNodeB, Radio Resource control) after the connection, UE can be carried on determined suggestion PLMN ID and HPLMN ID respectively RRC connection setup complete(RRC and be connected foundation and finish) in two different cells of message, send to eNodeB.

Need to prove, generally, for non-roaming UE, the final actual HPLMN of the being exactly ID of the suggestion PLMN ID value value of determining, in this case, UE can only report determined suggestion PLMN ID to eNodeB.

S104, network side are according to pre-configured Access Control Policy, for UE selects to insert core net.

If select in the Indication message in the core net that UE reports, suggestion PLMN ID and HPLMN ID have been comprised simultaneously, then can to judge this UE be the UE that roams to this shared RAN to eNodeB, can be that UE selects to insert core net according to pre-configured strategy further, for example:

ENodeB can be defined as the access core net of UE directly with the PLMN corresponding with suggestion PLMN ID, and the suggestion PLMN here is the PLMN that UE selects in aforesaid step e) or step f) at random;

The HPLMN ID that eNodeB also can report according to UE is that UE selects core net.ENodeB can learn the signatory operator of this UE according to the HPLMN ID that UE reports, further can be according to the collocation strategy of operator in sharing RAN, for UE selects to insert PLMN.For example:

Roaming access priority according to a plurality of operators of sharing this RAN and the signatory operator of UE is UE selection PLMN in proper order, and perhaps a plurality of operators of shared this RAN of basis are that UE selects PLMN to roamer's the ratio of sharing, etc.

Certainly, more than two examples only be used for schematically illustrating, be understandable that each operator can dispose multiple concrete Access Control Policy in eNodeB, to realize the flexible control to UE access core net.

More than introduced the scheme of network side for roaming UE selection access core net, in actual applications, for non-roaming UE, network side can directly insert its Home PLMN with this UE.Referring to shown in Figure 3, in another embodiment of the present invention, it is a kind of specific implementation method that UE selects to insert core net that network side is provided, and this method is applicable to roaming UE and non-roaming UE, may further comprise the steps:

S104a, eNodeB judge whether carry HPLMN ID in this message after receiving core net selection Indication message, if not, carry out S104b; If carry out S104c.

S104b will advise that the corresponding PLMN of PLMN ID is defined as the access PLMN of UE.

If select in the Indication message in the core net that UE reports, only comprised the cell of suggestion PLMN ID, do not comprise the cell of HPLMN ID, illustrate in a plurality of PLMN that share RAN, comprised the Home PLMN of this UE.ENodeB can directly control UE and insert the PLMN corresponding with suggestion PLMN ID, the just Home PLMN of this UE.

S104c is according to pre-configured Access Control Policy, for UE selects to insert core net.

If select in the Indication message in the core net that UE reports, suggestion PLMN ID and HPLMN ID have been comprised simultaneously, then can to judge this UE be the UE that roams to this shared RAN to eNodeB, can be that UE selects to insert core net according to pre-configured strategy further, concrete system of selection can be referring to the description among the S104, no longer repeat specification here.

Use technique scheme, suggestion PLMN ID and HPLMN ID that network side can report simultaneously according to UE judge UE and are in roaming state.For roaming UE, network side can directly select the core net of its suggestion as inserting core net, also can for UE selects to insert core net, thereby realize that operator inserts the flexible control of core net to the roamer according to the homing core net of UE, in conjunction with the Access Control Policy of operator.

Description by above method embodiment, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out all or part of step of the described method of each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as read-only memory (ROM), random-access memory (ram), magnetic disc or CD.

Corresponding to top method embodiment, the embodiment of the invention also provides a kind of network equipment and a kind of subscriber equipment.

Referring to shown in Figure 4, the network equipment that the embodiment of the invention provides comprises:

Core net identification of broadcast unit 201 is used for the core net sign to UE broadcasting share wireless access network RAN;

Indication message receiving element 202 is used for receiving the core net selection Indication message that described UE sends, and wherein, described UE generates described selection Indication message according to the core net sign of the shared RAN that broadcasts;

Judging unit 203 is used for judging described core net selection Indication message, whether carries the homing core network mark and knows,

First selected cell 204 is used in the judged result of described judging unit when being, according to the pre-configured Access Control Policy of network side, is that described UE selects the access core net.

Wherein, when being, first selected cell 204 can be known according to the homing core network mark of described UE, be that described UE selects the access core net in the core net of sharing RAN in the judged result of described judging unit.

Referring to shown in Figure 5, the network equipment that the embodiment of the invention provides can also comprise:

Second selected cell 205 is used in the judged result of described judging unit will inserting the corresponding core net of core net sign with described suggestion for not the time, is defined as the access core net of described UE.

Network equipment that the embodiment of the invention provides, can know according to the homing core network mark that UE reports, judge that this UE belongs to the roamer, and then the information that can report according to UE and pre-configured Access Control Policy, for UE selects to insert core net, thereby realize that operator inserts the flexible control of core net to the roamer.

Referring to shown in Figure 6, the subscriber equipment that the embodiment of the invention provides comprises:

Core net sign receiving element 301 is used for receiving the core net sign of the shared wireless access network RAN that network side broadcasts;

Indication message transmitting element 302, be used for working as the core net that receives and identify the homing core network mark knowledge that does not comprise described UE, or the registration core net that comprises described UE in the core net that the receives sign identifies and this registration core net sign is known not simultaneously with the homing core network mark of described UE, described homing core network mark knowledge is carried on core net selects to send to network side in the Indication message, described core net selection Indication message is used to indicate network side and selects inserting core net.

Subscriber equipment that the embodiment of the invention provides can select one of them to report network side in a plurality of core net signs that network side is broadcasted.For roaming UE, also the homing core network mark of self can be known also reporting network side simultaneously.And then the network side core net sign that can report according to subscriber equipment, pre-configured Access Control Policy is that subscriber equipment selects to insert core net, realizes that operator inserts the flexible control of core net to the roamer.

The embodiment of the invention also provides a kind of mobile communication system, this system comprises network equipment and subscriber equipment, wherein said network equipment and subscriber equipment can be identical with the network equipment and the subscriber equipment that provide in the previous embodiment, no longer repeat specification here.

For device or system embodiment, because it is substantially corresponding to method embodiment, so relevant part gets final product referring to the part explanation of method embodiment.Device described above or system embodiment only are schematic, wherein said unit as the separating component explanation can or can not be physically to separate also, the parts that show as the unit can be or can not be physical locations also, namely can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select wherein some or all of module to realize the purpose of present embodiment scheme according to the actual needs.Those of ordinary skills namely can understand and implement under the situation of not paying creative work.

In several embodiment that the application provides, should be understood that, disclosed system, apparatus and method not surpassing in the application's the spirit and scope, can realize in other way.Current embodiment is a kind of exemplary example, should be as restriction, and given particular content should in no way limit the application's purpose.For example, the division of described unit or subelement only is that a kind of logic function is divided, and during actual the realization other dividing mode can be arranged, and for example a plurality of unit or a plurality of subelement combine.In addition, a plurality of unit can or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.

In addition, institute's descriptive system, the schematic diagram of apparatus and method and different embodiment, in the scope that does not exceed the application, can with other system, module, technology or method in conjunction with or integrated.Another point, the shown or coupling each other discussed or directly to be coupled or to communicate to connect can be by some interfaces, the indirect coupling of device or unit or communicate to connect can be electrically, machinery or other form.

The above only is the specific embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims

1. a method of selecting to insert core net is characterized in that, comprising:

2. method according to claim 1 is characterized in that,

The core net that described UE sends is selected in the Indication message, also carries described UE and identifies a selected suggestion according to the core net of described shared RAN and insert the core net sign.

3. a method of selecting to insert core net is characterized in that, comprising:

The core net sign of the shared wireless access network RAN that user equipment (UE) reception network side is broadcasted;

In the core net sign that receives, do not comprise the homing core network mark knowledge of described UE, or the registration core net that comprises described UE in the core net that the receives sign identifies, and should registration core net sign know not simultaneously with the homing core network mark of described UE, described homing core network mark knowledge is carried on core net to be selected to send to network side in the Indication message, described core net selection Indication message is used to indicate network side and selects inserting core net, wherein said core net is selected in the Indication message, also carries described UE and identifies a selected suggestion according to the core net of the shared RAN that broadcasts and insert the core net sign;

4. a network equipment is characterized in that, comprising:

First selected cell is used in the judged result of described judging unit knowing according to the homing core network mark of described UE when being, be described UE selection access core net in the core net of sharing RAN; Second selected cell is used in the judged result of described judging unit will inserting the corresponding core net of core net sign with described suggestion for not the time, is defined as the access core net of described UE.

5. a subscriber equipment is characterized in that, comprising: