CN100421527C

CN100421527C - Method for reinforcing equivalent public mobile network function

Info

Publication number: CN100421527C
Application number: CNB2005101339786A
Authority: CN
Inventors: 蔡亚莉; 刘佳
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2005-12-30
Filing date: 2005-12-30
Publication date: 2008-09-24
Anticipated expiration: 2025-12-30
Also published as: CN1802025A

Abstract

The present invention relates to a method for improving functions of an equal public mobile network (EPLMN), which comprises the following steps that 1. a wireless subsystem receives a request sent by a mobile terminal and forwards the request to core network equipment. 2. the core network equipment extracts terminal capability information and judges whether the mobile terminal is a version after R99, if true, then go to executing a step 4; else, then go to executing a step 3; 3. the core network equipment sends the confirmed information to the mobile terminal and executes a step 6; 4. the core network equipment adds an EPLMN list into the confirmed information and sends the confirmed information to the mobile terminal; 5. the mobile terminal stores the EPLMN list; 6. the mobile terminal executes the operation of accessing the network. Before sending out the EPLMN list, the present invention checks the terminal capability and determines whether to deliver the EPLMN list according to the terminal capability so as to avoid the problem that the user terminal without the EPLMN function is received to the EPLMN list.

Description

Strengthen the method for equivalent public mobile network function

Technical field

The present invention relates to a kind of enhancing equivalent public mobile network (Equivlent Public Land MobileNetwork, be called for short EPLMN) method of function, especially a kind ofly issue EPLMN at the terminal capability of moving communicating field by user terminal to send up and tabulate and strengthen the method for EPLMN function.

Background technology

Along with the arrival based on the wireless technology of 3G, the selectable class of business of wireless communication user is on the increase.Correspondingly, mobile operator can have a plurality of 2G simultaneously, 3G network provides service.For instance, for certain mobile operator,, during a 2G net, need two network No.s of application corresponding with it respectively when he has a 3G net simultaneously.The user of this operator's wireless service in use, user's Autonomic Migration Framework that 3G network can occur is to the 2G network conditions, cause the reason of this situation to be: the user is all the time from subscriber identification module (Subscriber Identity Module, be called for short SIM) card or mobile communication system user identification module (Universal Mobile Telecommunication SystemSubscribe Identity Module, abbreviation USIM) obtains international mobile subscriber identifier (International Mobile Subscriber Identity in the card, be called for short IMSI), from IMSI, extract Mobile Country Code MCC (Mobile Country Code then, be called for short MCC) and Mobile Network Code (MobileNetwork Code, abbreviation MNC) and with Subscriber Number make up, as the network No. of this user attaching network.Regulation according to international standard, home network is the highest rank, when mobile communication terminal is periodically searched for home network, if it is identical with the home network network No. to have detected the broadcasting network No., then automatically migration return to belong to network, therefore can cause the user can't be resident at the non-attribution network.Because the user of 3G network is by extracting IMSI as the ownership network No., and the ownership network No. is just in time with identical by the broadcasting network No. that broadcast channel sends the 2G network by wireless subsystem, therefore, when mobile communication carrier had simultaneously and run 2G, 3G network, the phenomenon that the user of 3G network moves back the 2G network will appear.

In order to solve above problem, industry has proposed the method for EPLMN.The realization of EPLMN function needs one group of nucleus equipment, this group nucleus equipment comprises mobile services switching centre (Mobile ServicesSwitching Centre, be called for short MSC) or MSC Server, GPRS service (GeneralPacket Radio Service, be called for short GPRS) and support node (Serving GPRS Support Node is called for short SGSN).When user terminal initiation position renewal/Routing Area Update/when IMSI adhered to request, nucleus equipment directly added the EPLMN tabulation in acknowledge message when the affirmation message of returning, can insert a plurality of network No.s by operator's demand in this tabulation.This EPLMN tabulation is handed down to terminal by wireless mode, when the terminal receipts receive this EPLMN tabulation, store this EPLMN tabulation, after the user terminal login networks, though detect current network is the non-attribution network, is the isopreference level net because of having indicated current network No. in the EPLMN tabulation with the ownership network No., searches net with regard to no longer carrying out periodicity, just can Autonomic Migration Framework not arrive home network yet, thereby realize in the network midium or long term of broadcasting non-attribution network No. resident.

But, the mode of existing granting EPLMN tabulation is-nucleus equipment directly interpolation EPLMN tabulation in returning to user's message, because not all user terminal can both receive the EPLMN tabulation, for the customer mobile terminal that can not receive the EPLMN tabulation, also just can't support the EPLMN function, even might cause this part user can't login network.

Summary of the invention

The purpose of this invention is to provide a kind of method that strengthens equivalent public mobile network function, can separate the user terminal of never supporting the EPLMN function and still can receive the EPLMN tabulation and cause user terminal can't step on the problem of net.

For achieving the above object, the invention provides a kind of method that strengthens equivalent public mobile network function, comprising:

Step 1, wireless subsystem mobile terminal receive be to the request of its initiation, and described request is forwarded to core network device;

Step 2, described core network device are extracted the terminal ability information in the described request, and judge according to described terminal ability information whether described portable terminal supports equivalent public mobile network function, are execution in step 4 then, otherwise execution in step 3;

Step 3, described core network device send acknowledge message to described wireless subsystem, and transmit this by described wireless subsystem and confirm message to described portable terminal, and execution in step 6 then;

Step 4, described core network device add the equivalent public mobile network tabulation of the Subscriber Number corresponding with described portable terminal in the acknowledge message to, and described confirmation sent to described wireless subsystem, by described wireless subsystem described acknowledge message is forwarded to described portable terminal again;

Step 5, the described equivalent public mobile network tabulation of described mobile terminal stores;

Step 6, described portable terminal are carried out the operation of access network.

In technique scheme, request described in the described step 1 is adhered to request for position renewal, Routing Area Update or international mobile subscriber identifier.Terminal ability information described in the described step 2 is the version number by the definition of 3G (Third Generation) Moblie cooperative programme.

By above-mentioned technical scheme as can be known, the present invention has the following advantages: the present invention carried out the terminal capability inspection before sending the EPLMN tabulation, whether decision issues the EPLMN tabulation according to terminal capability, has avoided not receiving the problem that the EPLMN tabulation is caused because user's terminal does not possess the ability of supporting the EPLMN function.

Below in conjunction with drawings and Examples, technical scheme of the present invention is described in further detail.

Description of drawings

Fig. 1 strengthens the applied system schematic of method of EPLMN function for the present invention.

Fig. 2 strengthens the flow chart of an embodiment of the method for EPLMN function for the present invention.

Embodiment

(3GPP:The 3 owing to the 3G (Third Generation) Moblie cooperative programme ^RdGeneration PartnershipProject) regulation, terminal capability is identified by the version number of different times issue, judges that therefore the terminal capability of portable terminal can be judged by checking by the version number of the different times of binary code correspondence.Regulation based on this 3GPP, the present invention utilizes core network device that the terminal capability of user terminal is judged, EPLMN tabulation is selectively issued, avoided because user terminal can not receive this EPLMN terminal that causes of tabulating reports an error, and even can't login the problem of network.

The present invention is applicable to the network of various standards, the network of every kind of standard has corresponding Radio Access Network and core network, Radio Access Network can be divided into the Radio Access Network of GSM network, the Radio Access Network of WCDMA net and the Radio Access Network of TDS-CDMA net, and core network can be divided into circuit-domain network and packet field network.The interface of wireless network by standard is connected with packet domain with the circuit domain of core network, provides service by the air interface of standard separately for the user again.Every kind of Radio Access Network can be connected with the core network of its standard separately, core network that also can two public wherein a kind of high standards of Radio Access Network, the core net that the Radio Access Network of GSM and WCDMA can shared WCDMA for example, this is because WCDMA is high standard net than the GSM network, and can backward compatible GSM server net function.In addition, three Radio Access Networks also can shared WCDMA or the core network of TDS-CDMA, because the core network of WCDMA and TDS-CDMA is compatible, and all backward compatible GSM, therefore the mode of combination can be any.

As shown in Figure 1, strengthen the applied system schematic of method of EPLMN function for the present invention, portable terminal 1 is various mobile communication equipments, for example cell phone, car phone, hand-held PDA etc., wireless subsystem 2 is difference to some extent in different Radio Access Networks, in the GSM network base station sub-system (Base Station sub-System, be called for short BSS), it in WCDMA Universal Terrestrial Radio Access Network road (Universal Terrestrial Radio Access Network is called for short UTRAN).Core network device 3 is divided into MSC, MSC server and SGSN according to the difference of core network, wherein MSC or MSC server are responsible for the user in the mobile management of circuit-domain network with call out control, simultaneously by and Radio Access Network between interface realize access control to Radio Access Network.If adopt GSM or the WCDMA of R99 version or the core net of TDS-CDMA, core network device 3 is MSC; If when adopting soft-exchange construction, then should be MSC Server mutually.SGSN is responsible for mobile management, the conversation management functional of user at packet field network, simultaneously by and Radio Access Network between interface realize access control to Radio Access Network.In core network device 3, have an EPLMN functional module, can realize the interpolation of EPLMN tabulation.

As shown in Figure 2, strengthen the flow chart of an embodiment of the method for EPLMN function for the present invention, it comprises the steps:

Step 101, portable terminal 1 start, receive the broadcasting of wireless subsystem 2, and select proper cell to initiate position renewal, Routing Area Update or IMSI and adhere to request to wireless subsystem 2, wireless subsystem 2 is transmitted to core network device 3 with this request after receiving the association requests of portable terminal 1 transmission;

Step

102,3 pairs of these information requested bags of core network device are decoded, and extract the terminal ability information of portable terminal 1, and this information is pairing 2 binary codes of version number of the defined different times issue of 3GPP standard;

Step 103, core network device 3 number are differentiated according to released version, in the 3GPP standard, R99 or later version are supported the EPLMN function, and R98 or former version can't be supported the EPLMN function, when the version number that determines portable terminal 1 is R99 or later version, when promptly having the EPLMN function, execution in step 104; When the version number that determines portable terminal 1 be R98 or before version the time, when promptly not having the EPLMN function, execution in step 1031;

Step 1031, core network device 3 are beamed back confirmation to wireless subsystem 2, and by wireless subsystem 2 confirmation are transmitted to portable terminal 1, and execution in step 106;

The EPLMN that step 104, core network device 3 obtain with respect to this mobile terminal user number to the EPLMN functional module of self tabulates, after obtaining the EPLMN tabulation is added in the affirmation message of returning, and send to wireless subsystem 2, by wireless subsystem 2 this acknowledge message is transmitted to portable terminal 1 again;

Step 105, portable terminal 1 extract the EPLMN tabulation in the affirmation message that receives, and store;

Step 106, portable terminal 1 are carried out the operation that inserts equivalent public mobile network, and end operation, for the portable terminal that does not receive the EPLMN tabulation, can network according to normal flow process, and, can judge whether current network and home network belong to same rank according to this tabulation for the portable terminal that receives the EPLMN tabulation, if same rank, then carry out normal EPLMN function, reside in the current network; If not same rank, then under the IDLE state, when the timer in the subscriber card then after, execution cycle property is searched net operation.

It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit of technical solution of the present invention.

Claims

1. method that strengthens equivalent public mobile network function, it may further comprise the steps:

2. method according to claim 1, the wireless subsystem that adopts in the wherein said step 1 is base station sub-system or Universal Terrestrial Radio Access Network road.

3. method according to claim 1, the core network device that adopts in the wherein said step 1 is mobile services switching centre, mobile services switching centre server or GPRS serving GPRS support node.

4. method according to claim 1, request described in the wherein said step 1 is adhered to request for position renewal, Routing Area Update or international mobile subscriber identifier.

5. method according to claim 1, the terminal ability information that extracts in the described request in the wherein said step 2 is specially: described core network device is decoded to the packets of information of described request, extracts the terminal ability information of described portable terminal.

6. method according to claim 1, terminal ability information described in the wherein said step 2 are the version number by the definition of 3G (Third Generation) Moblie cooperative programme.