CN103428669A - Temporary identity identifying method, temporary identity recognizing method, terminal, network cell device and system - Google Patents
Temporary identity identifying method, temporary identity recognizing method, terminal, network cell device and system Download PDFInfo
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Abstract
The invention discloses a temporary identity identifying method, a temporary identity recognizing method and a corresponding terminal, network cell device and communication system. The temporary identity identifying method includes the steps that when the terminal needs to initiate TAU or RAU, reserved bits of a mobile identification number cell are identified according to preset information to indicate that temporary identities are obtained by mapping or distributed to the terminal in advance by other core network devices of a network which the terminal is attached to; a TAU request message or RAU request message is sent, wherein the TAU request message or RAU request message includes the identified mobile identification number cell. By means of the temporary identity identifying method, the temporary identity recognizing method and the corresponding terminal, network cell device and communication system, contradiction between an MSB scheme and current network deployment in selection on core network nodes is avoided, and influence on networks and equipment is small.
Description
Technical field
The application relates to the communications field, relates in particular to a kind of method of temporary mark, method and corresponding communication terminal, network element device and communication system of identification temporary mark of identifying.
Background technology
GERAN/UTRAN(GSM EDGE Radio Access Network; GSM EDGE Radio Access Network/UMTS Terrestrial Radio Access Network; UMTS Terrestrial radio access network) temporary mark in is P-TMSI(Packet Temporary Mobile SubscriberIdentity; Grouping temporarily moved subscriber identification number).P-TMSI is for different SGSN(Serving GPRS Support Node in the same POOL of unique identification; Serving GPRS Support Node).P-TMSI and RAI(Routing Area Identity; The Route Area indications) together can be in the whole network SGSN of unique identification.E-UTRAN(Evolved UTRAN; The Universal Terrestrial Radio Access Network of evolution) temporary mark in is GUTI(Globally Unique Temporary UE Identity; The unique interim UE sign in the whole world).GUTI can be in the whole network MME(Mobility Management Entity of unique identification; Mobile management entity).
Therefore, RAI and P-TMSI SGSN of unique sign that combines in the 2G/3G network, and in the LTE network MME of the unique sign of temporary mark GUTI.
The user is when being moved, and the purpose nucleus equipment need to be selected the source equipment of the core network according to temporary mark.When the user moves in consolidated network, its temporary mark is given this user by other devices allocation in Home Network; When the user moves between two kinds of heterogeneous networks, this temporary mark is the temporary mark mapping from non-present networks.For example, when the user roams into the MME of LTE from the SGSN of 2G/3G, the temporary mark that SGSN is handed down to MME is the GUTI come from RAI and P-TMSI mapping, and the GUTI that now MME need to come according to mapping finds source SGSN.
In order to distinguish the temporary mark of heterogeneous networks while moving between net, 3GPP has proposed the MSB solution when formulating the standard of Rel-8, by the MS Bit highest order of LAC and MME Group ID, is distinguished.Be that MSB=1 means that MME Group ID(temporary mark is distributed by MME), MSB=0 means that the LAC(temporary mark is distributed by SGSN).LAC and MME Group ID are mutually mappings, that is to say when LAC is mapped as MME Group ID, and according to the setting of MSB, the first place of shining upon the MME Group ID obtained not yet 0.Yet before the Rel-8 standard, use has mixed when distributing temporary mark in operator, and operator, when distributing LAC, has been used number section that MSB is 1, causes having contradiction with the requirement of standard, can't distinguish temporary mark with MSB.
In order to address the above problem, following solution is proposed at present:
The first scheme: carrying IMSI(International Mobile Subscriber Identity; International mobile subscriber identity), the cell EPS Mobile Identity IE(EPS mobile logo cell of the sign such as GUTI), there are three bits to be used for meaning Type of Identity(sign type).Type of Identity means that this cell is IMSI at 001 o'clock, is to mean that this cell is GUTI at 110 o'clock.This scheme proposes in Type of Identity interpolation to be worth to indicate GUTI is that mapping is come or distributed by source MME, as to use 110 expression GUTI be that source MME distributes (Native GUTI), using 111 expression GUTI is (Mapped GUTI) that mapping is come.Now the default behavior of MME needs to revise, to distinguish the Type of Identity of increase;
Alternative plan: when Type of Identity is GUTI, EPS mobile identity is last to be added one (the 14th byte) to indicate GUTI is that mapping is come or is distributed by source MME;
Third party's case: to indicate GUTI be that mapping is come or distributed by source MME with the irrelevant IE of EPS Mobile Identity IE to add one;
Above scheme all requires to revise the default behavior of terminal and the default behavior of core net node (MME and SGSN), so that terminal is carried cell, parameter or the flag bit that can distinguish the temporary mark attribute, for the first scheme, in a NAS message that does not have a new UE that improved traditional MME receives to send, during with the new Type of Identity added, MME can report an error because can not identify the type; Need to add byte on original cell or add a new cell for alternative plan and third party's case, this impact on network is larger.
Summary of the invention
The application obtains purpose and is to provide a kind of method of existing network and equipment being changed to less, as not need to add cell sign temporary mark.
The application's a execution mode discloses a kind of method that identifies temporary mark, comprising: the reservation position that identifies mobile identification code cell according to predetermined information when terminal needs initiating updating of tracking area (TAU) or Routing Area Update (RAU) is to mean that temporary mark is that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to described terminal; And sending TAU request message (TAU request) or RAU request message (RAU request), described TAU request message or RAU request message comprise the mobile identification code cell of sign.
Another execution mode of the application discloses a kind of method of identifying temporary mark, comprise: TAU request message or RAU request message that the network element device receiving terminal sends when initiating TAU or RAU, described TAU request message or RAU request message comprise mobile identification code cell; And to identify described temporary mark according to the reservation position of described mobile identification code cell be that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to described terminal.
The application's a execution mode discloses a kind of communication terminal, comprise: identification module, identifying the reservation position of mobile identification code cell when described terminal need to be initiated TAU or RAU according to predetermined information, is that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to described terminal to mean temporary mark; And sending module, sending TAU request message or RAU request message to the network element device newly adhered to, described TAU request message or RAU request message comprise the mobile identification code cell of sign.
The application's a execution mode discloses a kind of network element device, comprising: receiver module, and TAU request message or RAU request message that receiving terminal sends when initiating TAU or RAU, described TAU request message or RAU request message comprise mobile identification code cell; And identification module, identifying described temporary mark according to the reservation position of described mobile identification code cell is that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to described terminal.
The application's a execution mode discloses a kind of communication system, comprise: terminal, when initiating TAU or RAU, needs identify the reservation position of mobile identification code cell according to predetermined information, and sending TAU request message or RAU request message to the network element device newly adhered to, described TAU request message or RAU request message comprise the mobile identification code cell of sign; And network element device, receive TAU request message or RAU request message that described terminal sends, identifying described temporary mark according to the reservation position of described mobile identification code cell is that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to described terminal.
By above-mentioned execution mode, utilized the reservation position of mobile identification code cell in NAS message identify current temporary mark be mapping and come or other equipments of the core network of present networks before distributed to this user, thereby solved the contradiction that MSB scheme and existing network are disposed existence during core net node is selected.And what use due to above-mentioned execution mode is the attribute that reservation position in the existing parameter of existing cell identifies temporary mark, therefore less on the impact of network and equipment.
The accompanying drawing explanation
Fig. 1 is the schematic diagram according to the communication terminal 10 of an execution mode of the application;
Fig. 2 is the method 1000 according to the sign temporary mark of an execution mode of the application;
Fig. 3 is the structure chart of EPS Mobile Identity IE;
Fig. 4 is the schematic diagram according to the network element device 20 of an execution mode of the application; And
Fig. 5 is the method 2000 according to the identification temporary mark of an execution mode of the application;
Fig. 6 is the schematic diagram according to the communication system of an execution mode of the application.
Embodiment
Execution mode below in conjunction with the accompanying drawing DETAILED DESCRIPTION The present application.
Fig. 1 is the schematic diagram according to the communication terminal 10 of an execution mode of the application.Communication terminal 10 comprises identification module 101 and sending module 102.Identification module 101 identifies the reservation position of mobile identification code cell when terminal 10 needs to initiate TAU/RAU according to predetermined information, to mean temporary mark, be that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to terminal.For example, identification module 101 identifies the reservation position of mobile identification code cell according to predetermined information, with mean temporary mark be by mapping, obtained or other network element devices of present networks distribute to this terminal.Sending module 102 sends the TAU/RAU request message to the network element device newly adhered to, and this TAU/RAU request message comprises the mobile identification code cell of sign.
Fig. 2 is the method 1000 according to the sign temporary mark of an execution mode of the application.Below by the communication terminal 10 in conjunction with shown in Fig. 1, the method 1000 shown in Fig. 2 is described.
In step S110, the identification module 101 of communication terminal 10 identifies the reservation position of mobile identification code cell when needs are initiated TAU/RAU according to predetermined information, to mean temporary mark, be that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to terminal.For example, in step S110, identification module 101 identifies the reservation position of mobile identification code cell according to predetermined information, with mean temporary mark be by mapping, obtained or other network element devices of present networks distribute to this terminal.Then in step S120, sending module 102 sends the TAU/RAU request message to the network element device newly adhered to and (is NAS(Non-Access Stratum; Non-Access Stratum) message), this TAU/RAU request message comprises the mobile identification code cell of sign.
For example, in step S110, communication terminal 10 can be initiated TAU(Tracking Area Update at needs; Tracing section updating) identify the reservation position of mobile identification code cell the time according to predetermined information, take and mean that temporary mark GUTI now distributes to this terminal as the former MME adhered to or obtain for RAI/P-TMSI shines upon.For example communication terminal 10 changes tracking area that MME that adheres to cover from the former MME adhered to and moves to tracking area that purpose MME covers and needs initiation TAU, perhaps communication terminal 10 is from switching between 2G/3G network net or reselect to the LTE network and while need initiating TAU, identification module 101 moves the reservation position in the identification code cell according to predetermined message identification, take and means that temporary mark GUTI now distributes to this terminal as the former MME adhered to or obtain for RAI/P-TMSI shines upon.
For example, current mobile identification code cell is EPS Mobile Identity IE, and its structure as shown in Figure 3.In prior art, when EPS Mobile Identity IE means GUTI, the bit5-bit8 of its 3rd byte is filled to be " 1111 ", and these four is the reservation position of the byte-aligned while for this cell, being GUTI.In present embodiment, the identification module 101 of communication terminal 10 can utilize these four to mean that current temporary mark GUTI is that the former MME adhered to distributes to this terminal or obtains for RAI/P-TMSI mapping.
For example, the tracking area that communication terminal 10 covers from the former MME that adheres to moves to tracking area that purpose MME covers and needs while initiating TAU, identification module 101 can be " 1100 " by this four bit-identify, and the expression GUTI of take distributes to this terminal as the former MME adhered to; Communication terminal 10 is from switching between 2G/3G network net or reselect to the LTE network and while need initiating TAU, identification module 101 can be " 0000 " by this four bit-identify, take and means what GUTI obtained as RAI/P-TMSI shines upon.It will be appreciated by those skilled in the art that this is only example, also can be revised as other applicable forms by the bit5-bit8 of the 3rd byte of EPS Mobile Identity IE.
Then in step S120, sending module 102 is initiated TAU, and transmission TAU request message, this TAU request message comprises the mobile identification code cell through identification module 101 sign, so as purpose network element device identification temporary mark GUTI to be the former MME adhered to distribute to this terminal or for RAI/P-TMSI shines upon, obtain.
Again for example, in step S110, communication terminal 10 can be initiated RAU(Routing Area Update at needs; Routing Area Update) move the reservation position in the identification code cell according to predetermined message identification the time, take and mean that temporary mark P-TMSI distributes to this terminal as the former SGSN adhered to or obtain for GUTI shines upon.For example, communication terminal 10 changes Route Area that SGSN that adheres to cover from the former SGSN adhered to and moves to Route Area that purpose SGSN covers and needs initiation RAU, perhaps communication terminal 10 is from switching between LTE network net or reselect to the 2G/3G network and while need initiating RAU, identification module 101 moves the reservation position in the identification code cell according to predetermined message identification, take and means that temporary mark P-TMSI distributes to this terminal as the former SGSN adhered to or obtain for GUTI shines upon.
For example, current mobile identification code cell is Mobile Identity IE, and the bit5-bit8 of its 3rd byte is the reservation position while for this cell, being P-TMSI.In present embodiment, identification module 101 can be identified the bit5-bit8 of the 3rd byte of Mobile Identity IE, take and means that current temporary mark GUTI is that the former SGSN adhered to distributes to this terminal or obtains as the GUTI mapping.
For example, the Route Area that communication terminal 10 covers from the former SGSN that adheres to moves to Route Area that purpose SGSN covers and during needs initiation RAU, identification module 101 can be " 1100 " by this four bit-identify, take and means that P-TMSI distributes to this terminal as the former SGSN adhered to; Communication terminal 10 is from switching between LTE network net or reselect to the 2G/3G network and while need initiating RAU, identification module 101 can be " 0000 " by this four bit-identify, take and means what P-TMSI obtained as GUTI shines upon.It will be appreciated by those skilled in the art that this is only example, also can be revised as other applicable forms by the bit5-bit8 of the 3rd byte of Mobile Identity IE.
Then in step S120, sending module 102 sends the RAU request message, this RAU request message comprises the mobile identification code cell through identification module 101 sign, so as purpose network element device identification temporary mark P-TMSI to be the former SGSN adhered to distribute to this terminal or for GUTI shines upon, obtain.
By above-mentioned execution mode, utilized the reservation position of mobile identification code cell in the TAU/RAU request message, be the bit5 of the 3rd byte of EPS Mobile Identity IE to the bit5 of the 3rd byte of bit8 and mobile identity cell to bit8, identify current temporary mark and be mapping and come or other network element devices of present networks before distributed to this user's.Therefore, make the network element device of purpose network to identify temporary mark by the reservation position of mobile identification code cell in the TAU/RAU request message, thus solved core net node select in MSB scheme and the existing network contradiction of disposing existence.
According to above-mentioned execution mode, when the application's communication terminal moves within the service range of existing MME or SGSN, equipment of the core network can neglect four values that retain position in EPS Mobile Identity IE and Mobile Identity IE, and can not have the risk reported an error.And what use due to above-mentioned execution mode is the attribute that reservation position in the existing parameter of existing cell identifies temporary mark, therefore less on the impact of network and equipment.
Fig. 4 is the schematic diagram according to the network element device 20 of an execution mode of the application.As shown in Figure 4, network element device 20 comprises receiver module 201 and identification module 202.The TAU/RAU request message that receiver module 201 receiving terminals send, this TAU/RAU request message comprises mobile identification code cell.Identification module 201, identifying temporary mark according to the reservation position of mobile identification code cell is that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to terminal.
Fig. 5 is the method 2000 according to the identification temporary mark of an execution mode of the application.Below by the network element device 20 in conjunction with shown in Fig. 4, the method 2000 shown in Fig. 5 is described.
In step S210, the TAU/RAU request message that receiver module 201 received communication terminals send.Then in step S220, it is that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to terminal that identification module 202 is identified temporary mark according to the reservation position in the mobile identification code cell of sign.
For example, network element device can be MME.In step S210, the TAU request message that the receiver module 201 of MME can the received communication terminal be initiated.For example, the tracking area that receiver module 201 received communication terminals cover from the former MME that adheres to moves to the tracking area that purpose MME covers and the TAU request message of initiating, or received communication terminal 10 is from switching between 2G/3G network net or reselect to the LTE network and the TAU request message of initiating.
Then in step S220, identification module 202 is according to the identification of the reservation position in mobile identification code cell temporary mark, take that judgement temporary mark GUTI distributes to this terminal as the former MME adhered to or obtains for RAI/P-TMSI shines upon.For example, current mobile identification code cell is EPS Mobile Identity IE, and its structure as shown in Figure 3.In prior art, when EPS Mobile Identity IE means GUTI, the bit5-bit8 of its 3rd byte is filled to be " 1111 ", and these four is the reservation position of the byte-aligned while for this cell, being GUTI.In present embodiment, identification module 202 can utilize these four to identify current temporary mark GUTI be that the former MME adhered to distributes to this terminal or obtain for RAI/P-TMSI mapping.
For example, identification module 202 identifies these four when " 1100 ", means that tracking area that communication terminal covers from the former MME adhered to moves to the tracking area that purpose MME covers and initiates TAU, and temporary mark GUTI is that the former MME adhered to distributes to this terminal; Identify this four bit-identify when " 0000 ", mean communication terminal from switching between 2G/3G network net or reselect to the LTE network and initiate TAU, temporary mark GUTI is that the RAI/P-TMSI mapping obtains.It will be appreciated by those skilled in the art that this is only example, also can be revised as other applicable forms by the bit5-bit8 of the 3rd byte of EPS Mobile Identity IE.
Again for example, network element device also can be SGSN.In step S210, the RAU request message that the receiver module 201 of SGSN can the received communication terminal be initiated.For example, the Route Area that receiver module 201 received communication terminals cover from the former SGSN that adheres to moves to the Route Area that purpose SGSN covers and the RAU request message of initiating, or the received communication terminal is from switching between LTE network net or reselect to the 2G/3G network and the RAU that initiates.
Then in step S220, identification module 202 is according to the identification of the reservation position in mobile identification code cell temporary mark, take that judgement temporary mark P-TMSI now distributes to this terminal as the former SGSN adhered to or obtains for GUTI shines upon.For example, current mobile identification code cell is Mobile Identity IE, and the bit5-bit8 of its 3rd byte is the reservation position while for this cell, being P-TMSI.In present embodiment, identification module 202 can utilize these four to identify current temporary mark P-TMSI be that the former SGSN adhered to distributes to this terminal or obtain for GUTI mapping.
For example, identification module 202 identifies these four when " 1100 ", means that Route Area that communication terminal covers from the former SGSN adhered to moves to the Route Area that purpose SGSN covers and initiates RAU, and temporary mark P-TMSI is that the former SGSN adhered to distributes to this terminal; Identify this four bit-identify when " 0000 ", mean communication terminal from switching between LTE network net or reselect to the 2G/3G network and initiate RAU, temporary mark P-TMSI is that the GUTI mapping obtains.It will be appreciated by those skilled in the art that this is only example, also can be revised as other applicable forms by the bit5-bit8 of the 3rd byte of EPS Mobile Identity IE.
As a kind of selection, in step S220, whether at first identification module 202 also can identify reservation position in mobile identification code cell to identify temporary mark be " 1111 ".
If the determination result is NO, according to the method for describing in above-mentioned execution mode, according to the reservation position in mobile identification code cell, identify temporary mark, do not repeat them here.For example, the identification module 202 of MME identifies and retains position for " 1100 ", temporary mark GUTI is identified as to RAI/P-TMSI mapping gets, the identification module 202 of SGSN identifies and retains position for " 1100 ", temporary mark P-TMSI is identified as to the GUTI mapping gets; If identifying, the identification module of MME 202 retains position for " 0000 ", temporary mark GUTI is identified as by the former MME adhered to and distributes to this terminal, the identification module 202 of SGSN identifies and retains position for " 0000 ", temporary mark P-TMSI is identified as by the former SGSN adhered to and distributes to this terminal.
If judgment result is that to be, can adopt the two dns lookups of additional GUTI/additional P-TMSI and Double DNS query() mode of combination identifies temporary mark.
For example, the reservation position that the identification module 202 of MME identifies EPS Mobile Identity IE is " 1111 ", and whether identification comprises additional GUTI.If so, identifying old GUTI is that the RAI/P-TMSI mapping comes; If not, to identify old GUTI be that the former MME that adheres to distributes or communication terminal for the first time from the 2G/3G Network Mobility to the LTE network.Now, carry out two dns lookups.
For example, the reservation position that the identification module 202 of SGSN identifies Mobile Identity IE is " 1111 ", and whether identification comprises additional P-TMSI.If so, identifying old P-TMSI is that the GUTI mapping comes; If not, identifying old P-TMSI is that the former SGSN adhered to distributes, or communication terminal is for the first time from the LTE Network Mobility to the 2G/3G network.Now, carry out two dns lookups.
Fig. 6 is the schematic diagram according to the communication system of an execution mode of the application.As shown in Figure 6, communication system comprises communication terminal 10 and network element device 20.Communication terminal 10 identifies the reservation position of mobile identification code cell when needs are initiated TAU/RAU according to predetermined information, to mean that temporary mark is that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to terminal, and sending the TAU/RAU request message to the network element device newly adhered to, this TAU/RAU request message comprises the mobile identification code cell of sign.The TAU/RAU request message that network element device 20 receiving terminals 10 send, and to identify temporary mark according to the reservation position of mobile identification code cell be that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to terminal.
For example, communication terminal 10 can identify the reservation position of mobile identification code cell when needs are initiated TAU according to predetermined information, take and means that temporary mark GUTI now distributes to this terminal as the former MME adhered to or obtain for RAI/P-TMSI shines upon.For example communication terminal 10 changes tracking area that MME that adheres to cover from the former MME adhered to and moves to tracking area that purpose MME covers and needs initiation TAU, perhaps communication terminal 10 is from switching between 2G/3G network net or reselect to the LTE network and while need initiating TAU, identification module 101 moves the reservation position in the identification code cell according to predetermined message identification, take and means that temporary mark GUTI now distributes to this terminal as the former MME adhered to or obtain for RAI/P-TMSI shines upon.
For example, current mobile identification code cell is EPS Mobile Identity IE, and its structure as shown in Figure 3.In prior art, when EPS Mobile Identity IE means GUTI, the bit5-bit8 of its 3rd byte is filled to be " 1111 ", and these four is the reservation position of the byte-aligned while for this cell, being GUTI.In present embodiment, communication terminal 10 can utilize these four to mean that current temporary mark GUTI is that the former MME adhered to distributes to this terminal or obtains for RAI/P-TMSI mapping.
For example, the tracking area that communication terminal 10 covers from the former MME that adheres to moves to tracking area that purpose MME covers and needs while initiating TAU, can be " 1100 " by this four bit-identify, and the expression GUTI of take distributes to this terminal as the former MME adhered to; Communication terminal 10 is from switching between 2G/3G network net or reselect to the LTE network and while need initiating TAU, can be " 0000 " by this four bit-identify, take and means what GUTI obtained as RAI/P-TMSI shines upon.It will be appreciated by those skilled in the art that this is only example, also can be revised as other applicable forms by the bit5-bit8 of the 3rd byte of EPS Mobile Identity IE.
Then communication terminal 10 is initiated TAU, and sends the TAU request message, and this TAU request message comprises the mobile identification code cell through identification module 101 signs.
Network element device 20 can be MME.The TAU request message that MME received communication terminal is initiated, and according to the identification of the reservation position in mobile identification code cell temporary mark, take that judgement temporary mark GUTI distributes to this terminal as the former MME adhered to or obtain for RAI/P-TMSI shines upon.For example, current mobile identification code cell is EPS Mobile Identity IE, MME identifies these four when " 1100 ", mean that the tracking area that communication terminal covers from the former MME adhered to moves to the tracking area of purpose MME covering and initiates TAU, temporary mark GUTI is that the former MME adhered to distributes to this terminal; Identify this four bit-identify when " 0000 ", mean communication terminal from switching between 2G/3G network net or reselect to the LTE network and initiate TAU, temporary mark GUTI is that the RAI/P-TMSI mapping obtains.
Again for example, communication terminal 10 can move the reservation position in the identification code cell according to predetermined message identification when needs are initiated RAU, take and means that temporary mark P-TMSI distributes to this terminal as the former SGSN adhered to or obtain for GUTI shines upon.For example, communication terminal 10 changes Route Area that SGSN that adheres to cover from the former SGSN adhered to and moves to Route Area that purpose SGSN covers and needs initiation RAU, perhaps communication terminal 10 is from switching between LTE network net or reselect to the 2G/3G network and while need initiating RAU, move the reservation position in the identification code cell according to predetermined message identification, take and mean that temporary mark P-TMSI distributes to this terminal as the former SGSN adhered to or obtain for GUTI shines upon.
For example, current mobile identification code cell is Mobile Identity IE, and the bit5-bit8 of its 3rd byte is the reservation position while for this cell, being P-TMSI.In present embodiment, communication terminal 10 can be identified the bit5-bit8 of the 3rd byte of Mobile Identity IE, take and means that current temporary mark GUTI is that the former SGSN adhered to distributes to this terminal or obtains as the GUTI mapping.
For example, the Route Area that communication terminal 10 covers from the former SGSN that adheres to moves to Route Area that purpose SGSN covers and needs while initiating RAU, can be " 1100 " by this four bit-identify, and the expression P-TMSI of take distributes to this terminal as the former SGSN adhered to; Communication terminal 10 is from switching between LTE network net or reselect to the 2G/3G network and while need initiating RAU, can be " 0000 " by this four bit-identify, take and means what P-TMSI obtained as GUTI shines upon.It will be appreciated by those skilled in the art that this is only example, also can be revised as other applicable forms by the bit5-bit8 of the 3rd byte of Mobile Identity IE.
Then communication terminal 10 sends the RAU request message to network element device 20, and this RAU request message comprises the mobile identification code cell through identification module 101 signs.
Network element device also can be SGSN.The RAU request message that SGSN received communication terminal is initiated, and according to the identification of the reservation position in mobile identification code cell temporary mark, take that judgement temporary mark P-TMSI now distributes to this terminal as the former SGSN adhered to or obtain for GUTI shines upon.
For example, current mobile identification code cell is Mobile Identity IE, and the bit5-bit8 of its 3rd byte is the reservation position while for this cell, being P-TMSI.SGSN identifies these four when " 1100 ", means that Route Area that communication terminal covers from the former SGSN adhered to moves to the Route Area that purpose SGSN covers and initiates RAU, and temporary mark P-TMSI is that the former SGSN adhered to distributes to this terminal; Identify this four bit-identify when " 0000 ", mean communication terminal from switching between LTE network net or reselect to the 2G/3G network and initiate RAU, temporary mark P-TMSI is that the GUTI mapping obtains.It will be appreciated by those skilled in the art that this is only example, also can be revised as other applicable forms by the bit5-bit8 of the 3rd byte of EPS Mobile Identity IE.
As a kind of selection, whether at first network element device 20 also can identify reservation position in mobile identification code cell to identify temporary mark be " 1111 ".
If the determination result is NO, according to the method for describing in above-mentioned execution mode, according to the reservation position in mobile identification code cell, identify temporary mark, do not repeat them here.
If judgment result is that to be, can adopt the two dns lookups of additional GUTI/additional P-TMSI and Double DNS query() mode of combination identifies temporary mark.
For example, when network element device is MME, the reservation position that MME identifies EPS Mobile Identity IE is " 1111 ", and whether identification comprises additional GUTI.If so, identifying old GUTI is that the RAI/P-TMSI mapping comes; If not, to identify old GUTI be that the former MME that adheres to distributes or communication terminal for the first time from the 2G/3G Network Mobility to the LTE network.Now, carry out two dns lookups.
For example, when network element device is SGSN, the reservation position that SGSN identifies Mobile Identity IE is " 1111 ", and whether identification comprises additional P-TMSI.If so, identifying oldP-TMSI is that the GUTI mapping comes; If not, identifying old P-TMSI is that the former SGSN adhered to distributes, or communication terminal is for the first time from the LTE Network Mobility to the 2G/3G network.Now, carry out two dns lookups.
By above-mentioned execution mode, the application's network element device (MME/SGSN) also can compatible Rel-8/Rel-9 network.That is to say, the application's network element device (MME/SGSN) not only can be identified the temporary mark in the NAS message that the disclosed communication terminal of the application sends, and also can identify the temporary mark in the NAS message that the existing communication terminal sends.
The foregoing is only the application's preferred implementation; not thereby limit the scope of the claims of the application; every equivalent structure or conversion of equivalent flow process that utilizes present specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical field, all in like manner be included in the application's scope of patent protection.
Claims (15)
1. a method that identifies temporary mark comprises:
Identifying the reservation position of mobile identification code cell when terminal needs initiating updating of tracking area (TAU) or Routing Area Update (RAU) according to predetermined information, is that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to described terminal to mean temporary mark; And
Send TAU request message or RAU request message, described TAU request message or RAU request message comprise the mobile identification code cell of sign.
2. the step that identifies the reservation position of mobile identification code cell according to predetermined information when the method for claim 1, wherein described terminal need to be initiated TAU comprises:
Identify the reservation position of mobile identification code cell according to predetermined information, take mean described temporary mark the unique interim UE sign in the whole world (GUTI) distribute to described terminal for the former mobile management entity adhered to (MME), or shine upon and to obtain for Routing Area Identifier accords with/divide into groups temporarily moved subscriber identification number (RAI/P-TMSI).
3. the step that identifies the reservation position of mobile identification code cell according to predetermined information when the method for claim 1, wherein described terminal need to be initiated RAU comprises:
Identify the reservation position of mobile identification code cell according to predetermined information, take and mean that described temporary mark is P-TMSI and distributes to described terminal as the former Serving GPRS Support Node adhered to (SGSN), or obtain for the GUTI mapping.
4. a method of identifying temporary mark comprises:
TAU request message or RAU request message that the network element device receiving terminal sends when initiating TAU or RAU, described TAU request message or RAU request message comprise mobile identification code cell; And
Identifying described temporary mark according to the reservation position of described mobile identification code cell is that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to described terminal.
5. method as claimed in claim 4, described network element device is MME, the TAU request message that described network element device receiving terminal sends when initiating TAU or RAU or the step of RAU request message comprise:
The TAU request message that described MME receiving terminal sends while initiating TAU;
The step that described temporary mark is identified in the described reservation according to described mobile identification code cell position comprises:
Identifying described temporary mark according to the reservation position of described mobile identification code cell is that GUTI is that the former MME adhered to distributes to described terminal, or obtains for RAI/P-TMSI mapping.
6. method as claimed in claim 4, described network element device is SGSN, the TAU request message that described network element device receiving terminal sends when initiating TAU or RAU or the step of RAU request message comprise:
The RAU request message that described SGSN receiving terminal sends while initiating RAU;
The step that described temporary mark is identified in the described reservation according to described mobile identification code cell position comprises:
Identifying described temporary mark according to the reservation position of described mobile identification code cell is that P-TMSI is that the former SGSN adhered to distributes to described terminal, or obtains for GUTI mapping.
7. a communication terminal comprises:
Identification module identifies the reservation position of mobile identification code cell when described terminal need to be initiated TAU or RAU according to predetermined information, to mean temporary mark, be that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to described terminal; And
Sending module, send TAU request message or RAU request message to the network element device newly adhered to, and described TAU request message or RAU request message comprise the mobile identification code cell of sign.
8. communication terminal as claimed in claim 7, when described identification module need to be initiated TAU in described terminal, identify the reservation position of mobile identification code cell according to predetermined information, take and mean that described temporary mark is GUTI and distributes to described terminal as the former MME adhered to, or obtain for the RAI/P-TMSI mapping.
9. communication terminal as claimed in claim 7, when described identification module need to be initiated RAU in described terminal, identify the reservation position of mobile identification code cell according to predetermined information, take mean described temporary mark to be P-TMSI distribute to described terminal as the former SGSN adhered to or obtain as the GUTI mapping.
10. a network element device comprises:
Receiver module, TAU request message or RAU request message that receiving terminal sends when initiating TAU or RAU, described TAU request message or RAU request message comprise mobile identification code cell; And
Identification module, identifying described temporary mark according to the reservation position of described mobile identification code cell is that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to described terminal.
11. network element device as claimed in claim 10, described network element device is MME, the TAU request message sent when described receiver module receiving terminal is initiated TAU; And
It is that GUTI is that the former MME adhered to distributes to described terminal that described identification module identifies described temporary mark according to the reservation position of described mobile identification code cell, or obtains for RAI/P-TMSI mapping.
12. network element device as claimed in claim 10, described network element device is SGSN, the RAU request message that described receiver module sends when also receiving terminal is initiated RAU; And
It is that P-TMSI is that the former SGSN adhered to distributes to described terminal that described identification module identifies described temporary mark according to the reservation position of described mobile identification code cell, or obtains for GUTI mapping.
13. a communication system comprises:
Terminal, when initiating TAU or RAU, needs identify the reservation position of mobile identification code cell according to predetermined information, and sending TAU request message or RAU request message to the network element device newly adhered to, described TAU request message or RAU request message comprise the mobile identification code cell of sign; And
Described network element device, receive TAU request message or RAU request message that described terminal sends, identifying described temporary mark according to the reservation position of described mobile identification code cell is that obtain or other the equipments of the core network former attach to network of terminal of mapping had before been distributed to described terminal.
14. system as claimed in claim 13, wherein, when described terminal is initiated TAU at needs, identify the reservation position of mobile identification code cell according to predetermined information; And
Described network element device is MME, receive the TAU request message that described terminal sends, and to identify described temporary mark according to the reservation position of described mobile identification code cell be that GUTI is that the former MME adhered to distributes to described terminal, or obtain for the RAI/P-TMSI mapping.
15. system as claimed in claim 13, wherein, when described terminal is initiated RAU at needs, identify the reservation position of mobile identification code cell according to predetermined information; And
Described network element device is SGSN, receives the RAU request message that described terminal sends, and to identify described temporary mark according to the reservation position of described mobile identification code cell be that P-TMSI is that the former SGSN adhered to distributes to described terminal, or obtains for GUTI shines upon.
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| CN103428669B (en) | 2016-12-14 |
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