CN1859785A - Moving exchanging center switching method of location updating and user imputing - Google Patents

Moving exchanging center switching method of location updating and user imputing Download PDF

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Publication number
CN1859785A
CN1859785A CNA2006100347347A CN200610034734A CN1859785A CN 1859785 A CN1859785 A CN 1859785A CN A2006100347347 A CNA2006100347347 A CN A2006100347347A CN 200610034734 A CN200610034734 A CN 200610034734A CN 1859785 A CN1859785 A CN 1859785A
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China
Prior art keywords
mobile switching
switching centre
user
subscriber identity
base station
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Granted
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CNA2006100347347A
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Chinese (zh)
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CN100446622C (en
Inventor
方峻
叶思海
尤昉
李岩
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CNB2006100347347A priority Critical patent/CN100446622C/en
Publication of CN1859785A publication Critical patent/CN1859785A/en
Priority to PCT/CN2007/000522 priority patent/WO2007109966A1/en
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Publication of CN100446622C publication Critical patent/CN100446622C/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W60/00Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/12Reselecting a serving backbone network switching or routing node

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention discloses position updating method. Said method mainly includes user mobile station originating position updating; moving switching center responding said position updating and distributing temporary mobile user identity containing indicating said user attribution moving switching center information to said user mobile station, completing position updating. The present invention also discloses user attributive moving switching center switching method.

Description

Mobile switching centre's changing method of position renewal and user attaching
Technical field
The present invention relates to the mobile communication technology field, in particular, the present invention relates to that position in a kind of CDMA mobile telecommunication network is upgraded and mobile switching centre's changing method of user attaching.
Background technology
Usually networking mode is star-like in mobile communications network, for example in the CDMA mobile telecommunication network, a base station controller (Base Station Control, BSC) can only meet (the Mobile Switch Center of a mobile switching centre, MSC), a MSC then can meet a plurality of BSC, as shown in Figure 1, between this MSC and the BSC 1: the relation of N has restricted the flexibility of networking, at first, if because the user capacity dilatation need increase a MSC node in existing network, then must increase at least one BSC equipment (even Access Network covering and user's disposal ability are enough) simultaneously, otherwise should can't work by newly-increased MSC; In addition; the user capacity of MSC is increasing at present; when a MSC is shutting down upgrade maintenance; the overload or break down when delaying machine; all BSC of following extension are with ineffective; under this MSC the wireless range that all BSC covered in the user all can't carry out Circuit Service communication, very big to user's influence, also be that operator institute is flagrant.Industry presses for and is implemented in the MSC device upgrade that BSC connects and safeguards, behind overload or the paralysed machine, allows other available MSC that it connected can be that the user in this BSC institute coverage serves.
Summary of the invention
The technical problem that the present invention solves provides mobile switching centre's changing method of renewal of a kind of position and user attaching, to be implemented in the MSC device upgrade maintenance that BSC is connected, behind overload or the paralysed machine, allow other available MSC that it connected to be the service of the user in this BSC institute coverage.
For addressing the above problem, location updating method of the present invention comprises:
A, user's Mobile Origination position are upgraded;
B, respond the mobile switching centre that this position upgrades and distribute to this user's travelling carriage and comprise the temporarily moved subscriber identity of indicate this user attaching mobile switching centre information, the completing place renewal.
Wherein, described indication user attaching mobile switching centre information is the Internet resources indications.
Wherein, step a specifically comprises:
A1, user's travelling carriage send location update message to base station controller;
A2, base station controller detect the Internet resources indication information that whether carries this user attaching mobile switching centre of indication in the described location update message, if check result is for being, then the mobile switching centre to described Internet resources indication indication sends location update message, otherwise, send location update message to the mobile switching centre that the International Mobile Subscriber Identity based on the user is routed to.
Wherein, step b specifically comprises:
The mobile switching centre of b1, response user position update returns the temporarily moved subscriber identity assignment messages of carrying the Internet resources indication to user's travelling carriage;
B2, user's travelling carriage return the temporarily moved subscriber identity to mobile switching centre and have assigned message;
B3, mobile switching centre upgrade to user's travelling carriage home position and finish message.
Correspondingly, a kind of user attaching of the present invention mobile switching centre changing method, this method mainly comprises:
A, base station controller determine that the mobile switching centre of user attaching is unavailable, and this user's Mobile Origination position is upgraded;
B, base station controller are selected the mobile switching centre of a mobile switching centre as this user attaching from a plurality of mobile switching centres of its connection;
The mobile switching centre that C, described base station controller are selected distributes to this user's travelling carriage and comprises the indication user attaching in the temporarily moved subscriber identity of mobile switching centre's information of this selection, switches to the mobile switching centre of this user attaching.
Alternatively, steps A specifically comprises:
User's travelling carriage uses the temporarily moved subscriber identity that comprises the Internet resources indication to carry out location registers, base station controller determines that the mobile switching centre of the user attaching that this temporarily moved subscriber identity is pointed to is unavailable, then, send location update request message to it according to local policy optional available mobile switching centre from the mobile switching centre of its connection;
The mobile switching centre that base station controller is selected finds that this user's temporarily moved subscriber identity is not that oneself distributes, and then issues temporarily moved subscriber identity assignment messages;
User's travelling carriage is deleted local temporarily moved subscriber identity of preserving after receiving the mobile subscriber identifier assignment messages, returns and has assigned message, and base station controller forwards the message to the mobile switching centre of its selection;
The mobile switching centre that base station controller is selected is to user's travelling carriage home position registration refuse information;
User's travelling carriage sends location update message to base station controller.
Alternatively, steps A specifically comprises:
User's travelling carriage uses the temporarily moved subscriber identity that comprises the Internet resources indication to begin to exhale, base station controller determines that the mobile switching centre of the user attaching that this temporarily moved subscriber identity is pointed to is unavailable, then, send connection management CM business request information to it according to local policy optional available mobile switching centre from a plurality of mobile switching centres of its connection;
The mobile switching centre that base station controller is selected finds that this temporarily moved subscriber identity is not that the mobile switching centre of own distribution and the user attaching that distributed the temporarily moved subscriber identity originally is unavailable, then issues temporarily moved subscriber identity assignment messages;
User's travelling carriage is deleted local temporarily moved subscriber identity of preserving after receiving described temporarily moved subscriber identity assignment messages, return the temporarily moved subscriber identity and assigned message, base station controller is transmitted described temporarily moved subscriber identity and has been assigned the mobile switching centre of message to the base station controller selection;
The mobile switching centre that base station controller is selected returns user's travelling carriage connection refused message;
User's travelling carriage sends location update message to base station controller.
Alternatively, steps A specifically comprises:
The page response of the temporarily moved subscriber identity that contains Internet resources indications of giving out a contract for a project on user's travelling carriage, base station controller determines that the mobile switching centre of the user attaching that this temporarily moved subscriber identity is pointed to is unavailable, then, send page-response message to it according to local policy optional available mobile switching centre from a plurality of mobile switching centres of its connection;
The mobile switching centre that base station controller is selected finds that this temporarily moved subscriber identity is not that the mobile switching centre of own distribution and the user attaching that distributed the temporarily moved subscriber identity originally is unavailable, then issues temporarily moved subscriber identity assignment messages;
User's travelling carriage is deleted the temporarily moved subscriber identity that this organizational security is deposited after receiving described temporarily moved subscriber identity assignment messages, return the temporarily moved subscriber identity and assigned message, base station controller is transmitted described temporarily moved subscriber identity and has been assigned the mobile switching centre of message to the base station controller selection;
The mobile switching centre that base station controller is selected returns user's travelling carriage connection refused message;
User's travelling carriage sends location update message to base station controller.
Alternatively, steps A specifically comprises:
The connectionless information of the temporarily moved subscriber identity that contains Internet resources indications of giving out a contract for a project on user's travelling carriage, base station controller determines that the mobile switching centre of the user attaching that this temporarily moved subscriber identity is pointed to is unavailable, then, transmit described connectionless information to it according to local policy optional available mobile switching centre from a plurality of mobile switching centres of its connection;
The mobile switching centre that described base station controller is selected finds that this temporarily moved subscriber identity is not that the mobile switching centre of own distribution and the user attaching that distributed the temporarily moved subscriber identity originally is unavailable, issues temporarily moved subscriber identity assignment messages;
User's travelling carriage is deleted the temporarily moved subscriber identity that this organizational security is deposited after receiving described temporarily moved subscriber identity assignment messages, return the temporarily moved subscriber identity and assigned message, base station controller is transmitted the temporarily moved subscriber identity and has been assigned the mobile switching centre of message to the base station controller selection;
The mobile switching centre that base station controller is selected returns connection refused message;
User's travelling carriage sends location update message to base station controller.
Wherein, base station controller described in the steps A determines that by following manner the mobile switching centre of user attaching is unavailable:
The mobile switching centre of base station controller and user attaching sets up and shakes hands, and determines that the mobile switching centre of user attaching is unavailable when shaking hands failure; Or
Link State between the mobile switching centre of base station controller judgement and user attaching when all link failures, determines when mobile switching centre's signalling point is unreachable that the mobile switching centre of user attaching is unavailable; Or
The mobile switching centre of network management system informing base station controller user attaching is unavailable.
Wherein, base station controller is selected the mobile switching centre of a mobile switching centre as this user attaching in the following manner among the step B from the mobile switching centre of its connection:
Base station controller is selected one at random from the mobile switching centre of a plurality of operate as normal of its connection; Or
Base station controller selects a load the lightest from the mobile switching centre of a plurality of operate as normal of its connection.
Wherein, step C specifically comprises:
Mobile switching centre returns the temporarily moved subscriber identity assignment messages of carrying the Internet resources indication to user's travelling carriage;
User's travelling carriage returns the temporarily moved subscriber identity to mobile switching centre and has assigned message;
Mobile switching centre upgrades to user's travelling carriage home position and finishes message.
Compared with prior art, the present invention has following beneficial effect:
The present invention is by increasing the TMSI allocation flow at the CDMAA interface, MSC distributes TMSI when user position update or service request, in TMSI, comprise NRI, be used to indicate the MSC of user attaching, BSC selects MSC according to NRI contained among the TMSI in the message, safeguard thereby be implemented in the MSC device upgrade that BSC connects, behind overload or the paralysed machine, allow other available MSC that it connected to be that the user in this BSC institute coverage serves.
Description of drawings
Fig. 1 is the simple networking schematic diagram of a kind of CDMA mobile telecommunication network of prior art;
Fig. 2 is an A-Flex networking schematic diagram of the present invention;
Fig. 3 is the TMSI structural representation that the present invention adopts;
Fig. 4 is the handling process schematic diagram of location updating method of the present invention;
Fig. 5 is the main flow chart of user attaching of the present invention mobile switching centre changing method;
Fig. 6 is the first embodiment flow chart of user attaching of the present invention mobile switching centre changing method;
Fig. 7 is the second embodiment flow chart of user attaching of the present invention mobile switching centre changing method;
Fig. 8 is the 3rd an embodiment flow chart of user attaching of the present invention mobile switching centre changing method;
Fig. 9 is the 4th an embodiment flow chart of user attaching of the present invention mobile switching centre changing method.
Embodiment
The present invention is based on A-Flex mechanism and realize, can connect a plurality of MSC simultaneously, just can safeguard, behind overload or the paralysed machine, allow other available MSC that it connected serve for the user in this BSC institute coverage a MSC device upgrade if so-called A-Flex is a BSC.A-Flex mechanism itself can make load balancing between a plurality of MSC nodes and load redistribute becomes possibility, can effectively avoid the appearance of individual node overload situations.
The A-Flex networking as shown in Figure 2, wherein the scope in pond is made up of the wireless coverage of a plurality of BSC, these a plurality of BSC are by all MSC (at least two) common service in the pond.The pond can be understood as the notion of a logic, by the decision of the routing mechanism on the BSC, can see that each BSC links to each other with all MSC in the pond in the pond in essence, can select arbitrarily in the middle of all MSC.
To sum up, above-mentioned Flex has following characteristics:
1.) BSC can meet a plurality of MSC.
2.) under the normal condition, BSC is based on user's the sign route with certain algorithm decision core net, and the user does not change the MSC of ownership when roaming in the pond.
3.) during a MSC fault, BSC changes algorithm, is determined to the new route of available path.
Be realization A-Flex among the present invention, increase the TMSI allocation flow at CDMA A interface, MSC distributes TMSI when user position update or service request, as shown in Figure 3, comprise Internet resources indication (Network Resource Indicator among the present invention in TMSI, NRI), be used to indicate the MSC of user attaching, NRI represents a unique core net node, is the address information of BSC addressing core net node, corresponding relation between NRI and the core net node, unified configuration among all BSC in the pond.The planning of NRI length settled at one go at the network planning initial stage, and can reserve the NRI node resource is follow-up dilatation.
MS is in the TMSI valid period, when last message, carry the TMSI that MSC distributes, BSC selects MSC according to the NRI among the TMSI, only do not carry TMSI but when carrying IMSI at MS, just use based on the routing algorithm of IMSI and select MSC, can conveniently in the whole service process, route messages to same MSC by the use of TMSI in CDMAA-Flex among the present invention.
The position that distribution T MSI of the present invention is described below in conjunction with Fig. 4 is new technological process more.
CDMA terminal use mobile station MS is to support the TMSI flow process among the present invention, after user's Mobile Origination position is upgraded, respond the mobile switching centre that upgrades this position and comprise the temporarily moved subscriber identity of indicating this user attaching mobile switching centre information to this user's travelling carriage distribution, the completing place is upgraded.
During specific implementation, user's travelling carriage by base station controller after mobile switching centre sends location update message, base station controller is checked the Internet resources indication information that whether carries this user attaching mobile switching centre of indication in the described location update message, if check result is not carry the Internet resources indication in the location update message, then this position of BSC decidable is updated to the position renewal first time of user's travelling carriage, and concrete handling process is as follows:
Base station controller carries out the MSC of its ownership of Route Selection according to the IMSI of user's travelling carriage, send location update message to this MSC, this MSC then sends the TMSI assignment messages to user's travelling carriage, the NRI that comprises the mobile switching centre that indicates this user attaching in the described TMSI assignment messages, user's travelling carriage then returns TMSI to described MSC and has assigned message, and the MSC of NRI indication returns user's mobile station position update and finishes message; If check result is to carry NRI in the described location update message, then this position of BSC decidable is updated to the follow-up location renewal of travelling carriage, and concrete handling process is as follows:
BSC sends location update message to the MSC of described NRI indication, the MSC of NRI indication returns TMSI to user's travelling carriage and distributes indication information, the NRI that comprises the MSC that indicates this user attaching in the described TMSI assignment messages, user's travelling carriage then returns TMSI to described MSC and has assigned message, and the MSC of NRI indication returns user's mobile station position update and finishes message.
Based on above-mentioned position new technological process more, during the MSC at user attaching among the present invention unavailable (for example fault or excess load etc.), also can realize the switching of user attaching MSC.
With reference to figure 5, this figure is the main flow chart of user attaching of the present invention mobile switching centre changing method, specifically mainly comprises following flow process:
Step 11, base station controller determine that the mobile switching centre of user attaching is unavailable, and the implement body of base stations control described in the present invention can determine that the mobile switching centre of user attaching is unavailable by following manner:
The mobile switching centre of base station controller and user attaching sets up and shakes hands, and determines that the mobile switching centre of user attaching is unavailable when shaking hands failure; Or
Link State between the mobile switching centre of base station controller judgement and user attaching when all link failures, determines when mobile switching centre's signalling point is unreachable that the mobile switching centre of user attaching is unavailable; Or
Webmaster O﹠amp; The mobile switching centre of M notifications base station controller user attaching is unavailable.
Step 12, this user's Mobile Origination position is upgraded.
Step 13, base station controller is selected the mobile switching centre of a mobile switching centre as this user attaching from a plurality of mobile switching centres of its connection, base station controller described in the present invention can be selected the mobile switching centre of a mobile switching centre as this user attaching in the following manner from the mobile switching centre of its connection:
Base station controller is selected one at random from the mobile switching centre of a plurality of operate as normal of its connection; Or
Base station controller selects a load the lightest from the mobile switching centre of a plurality of operate as normal of its connection.
Step 14, the mobile switching centre that described base station controller is selected distributes to this user's travelling carriage and comprises the indication user attaching in the temporarily moved subscriber identity of mobile switching centre's information of this selection, switches to the mobile switching centre of this user attaching.
Describe with specific embodiment below.
With reference to figure 6, this figure is the first embodiment flow chart of user attaching of the present invention mobile switching centre changing method.
In the present embodiment after a MSC fault, the user who belongs to this MSC initiates location registers, BSC is routed to normal MSC in the pond to this user's location registers message, MSC is receiving the location registers message of carrying TMSI, when judging that the active user needs location registers again, return and carry TMSI and TMSI expired time, delete current TMSI with wherein contained TMSI or TMSI expired time indication mobile phone, just can be registered to new MSC when mobile phone is initiated location registers again and go up, specifically mainly may further comprise the steps:
Step s101, user's mobile station MS use the TMSI that comprises NRI to carry out location registers, and BSC finds that the MSC1 that this TMSI points to breaks down, and then according to available MSC2 in the optional A-Flex zone of local policy, send location update request message to it;
Step s102, MSC2 find that this user's TMSI is not that oneself distributes, and then issue the TMSI assignment messages, and wherein the TMSI that is with can be changed to complete 1 or the TMSI expired time is changed to current system time;
Step s103, MS delete the TMSI that this organizational security is deposited after receiving message, return and have assigned message, and BSC forwards the message to MSC2;
Step s104, MSC2 home position registration refuse information;
Step s105, the location registers flow process that IMSI is carried in the MS initiation, BSC is according to MSC in the selected A-Flex zone of the routing data configuration information of IMSI and local configuration, as MSC3 and to its transmission location update request message;
Step s106, MSC3 are that MS distributes a TMSI, wherein contain the NRI information of this MSC3 of unique identification in this A-Flex zone, and BSC is handed down to MS with this TMSI information by the TMSI assignment messages;
Step s107, MS preserve the TMSI receive, TMSI_ZONE, and TMSI expired time etc., and return TMSI and assigned message, BSC forwards the message to MSC3;
Step s108, MSC3 home position upgrade and accept message.
With reference to figure 7, this figure is the second embodiment flow chart of user attaching of the present invention mobile switching centre changing method.
In the present embodiment after a MSC fault, the user who belongs to this MSC initiates connection management CM service request, BSC is routed to normal MSC in the pond to this user's connection management CM business request information, MSC is receiving the connection management CM business request information of carrying TMSI, when judging the MSC fault of original distribution T MSI, return and carry TMSI and TMSI expired time, delete current TMSI with wherein contained TMSI or TMSI expired time indication mobile phone, refuse this calling, in user's follow-up location registration (comprising the implicit location registers when carrying out business), just can be registered to new MSC and handle, specifically mainly may further comprise the steps:
Step s201, MS use the TMSI contain NRI to begin to exhale, and BSC finds MSC1 that this TMSI points to fault, then according to available MSC2 in the optional A-Flex zone of local policy, sends the CM business request information to it;
Step s202, MSC2 find that this TMSI oneself distributes and the MSC1 of original distribution T MSI breaks down;
Step s203, MSC2 issue the TMSI assignment messages, and wherein the TMSI that is with can be changed to complete 1 or the TMSI expired time is changed to current system time;
Step s204, MS delete the TMSI that this organizational security is deposited after receiving message, return TMSI and have assigned message, and BSC forwards the message to MSC2;
Step s205, MSC2 returns connection refused message.
Implicit location registers was to new MSC3 when step s206, follow-up MS carried out location registers or carry out business;
Afterwards, the user has registered to the tram MSC3 and distribution T MSI, and follow-up all flow processs can be carried out smoothly.
With reference to figure 8, this figure is the 3rd an embodiment flow chart of user attaching of the present invention mobile switching centre changing method.
In the present embodiment after a MSC fault, the user who belongs to this MSC returns page-response message, BSC is routed to normal MSC in the pond to this user's page-response message, MSC is receiving the page-response message of carrying TMSI, when judging the MSC fault of original distribution T MSI, return and carry TMSI and TMSI expired time, delete current TMSI with wherein contained TMSI or TMSI expired time indication mobile phone, refuse this calling, in user's follow-up location registration (comprising the implicit location registers when carrying out business), just can be registered to new MSC and handle, specifically mainly may further comprise the steps:
Step s301, the page response of the TMSI that contains NRI of giving out a contract for a project on the MS, BSC find MSC1 that this TMSI points to fault, then according to available MSC2 in the optional A-Flex zone of local policy, send page-response message to it;
Step s302, MSC2 find that this TMSI oneself distributes and the MSC1 of original distribution T MSI breaks down;
Step s303, MSC2 issue the TMSI assignment messages, and wherein the TMSI that is with can be changed to complete 1 or the TMSI expired time is changed to current system time;
Step s304, MS delete the TMSI that this organizational security is deposited after receiving message, return TMSI and have assigned message, and BSC forwards the message to MSC2;
Step s305, MSC2 returns connection refused message.
Implicit location registers was to new MSC3 when step s306, follow-up MS carried out location registers or carry out business;
Afterwards, user tram registers to MSC3 and distribution T MSI, and follow-up all flow processs can be carried out smoothly.
With reference to figure 9, this figure is the 4th an embodiment flow chart of user attaching of the present invention mobile switching centre changing method.
Be transmitted as example with connectionless information in the present embodiment and describe, specifically mainly may further comprise the steps:
Step s401, the access channel short message of the TMSI that contains NRI of giving out a contract for a project on the MS sends message, and BSC finds MSC1 that this TMSI points to fault, then according to available MSC2 in the optional A-Flex zone of local policy, sends ADDS Transfer message to it;
Step s402, MSC2 find that this TMSI oneself distributes and the MSC1 of original distribution T MSI breaks down;
Step s403, MSC2 issue the TMSI assignment messages, and wherein the TMSI that is with can be changed to complete 1 or the TMSI expired time is changed to current system time;
Step s404, MS delete the TMSI that this organizational security is deposited after receiving message, return TMSI and have assigned message, and BSC forwards the message to MSC2;
Implicit location registers was to new MSC3 when step s405, follow-up MS carried out location registers or carry out business.
Need illustrate that MSC3 may be same MSC with MSC2 in the above-mentioned present embodiment.
To sum up, the present invention can realize that a BSC is connected with a plurality of MSC, and is when a MSC fault, professional unaffected; Can also realize a plurality of MSC resource-sharings, load sharing; Improve the fail safe of network, optimized the resource distribution of network.
The above only is a preferred implementation 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 (12)

1, a kind of location updating method is characterized in that, comprising:
A, user's Mobile Origination position are upgraded;
B, respond the mobile switching centre that this position upgrades and distribute to this user's travelling carriage and comprise the temporarily moved subscriber identity of indicate this user attaching mobile switching centre information, the completing place renewal.
2, location updating method according to claim 1 is characterized in that, the information of described indication user attaching mobile switching centre is the Internet resources indications.
3, location updating method according to claim 2 is characterized in that, step a specifically comprises:
A1, user's travelling carriage send location update message to base station controller;
A2, base station controller are checked the Internet resources indication information that whether carries this user attaching mobile switching centre of indication in the described location update message, if check result is for being, then the mobile switching centre to described Internet resources indication indication sends location update message, otherwise, send location update message to the mobile switching centre that the International Mobile Subscriber Identity based on the user is routed to.
4, according to claim 2 or 3 described location updating methods, it is characterized in that step b specifically comprises:
The mobile switching centre of b1, response user position update returns the temporarily moved subscriber identity assignment messages of carrying the Internet resources indication to user's travelling carriage;
B2, user's travelling carriage return the temporarily moved subscriber identity to mobile switching centre and have assigned message;
B3, mobile switching centre upgrade to user's travelling carriage home position and finish message.
5, a kind of user attaching mobile switching centre changing method is characterized in that, comprising:
A, base station controller determine that the mobile switching centre of user attaching is unavailable, and this user's Mobile Origination position is upgraded;
B, base station controller are selected the mobile switching centre of a mobile switching centre as this user attaching from a plurality of mobile switching centres of its connection;
The mobile switching centre that C, described base station controller are selected distributes to this user's travelling carriage and comprises the indication user attaching in the temporarily moved subscriber identity of mobile switching centre's information of this selection, switches to the mobile switching centre of this user attaching.
6, user attaching according to claim 5 mobile switching centre changing method is characterized in that steps A specifically comprises:
User's travelling carriage uses the temporarily moved subscriber identity that comprises the Internet resources indication to carry out location registers, base station controller determines that the mobile switching centre of the user attaching that this temporarily moved subscriber identity is pointed to is unavailable, then, send location update request message to it according to local policy optional available mobile switching centre from the mobile switching centre of its connection;
The mobile switching centre that base station controller is selected finds that this user's temporarily moved subscriber identity is not that oneself distributes, and then issues temporarily moved subscriber identity assignment messages;
User's travelling carriage is deleted local temporarily moved subscriber identity of preserving after receiving the mobile subscriber identifier assignment messages, returns and has assigned message, and base station controller forwards the message to the mobile switching centre of its selection;
The mobile switching centre that base station controller is selected is to user's travelling carriage home position registration refuse information;
User's travelling carriage sends location update message to base station controller.
7, user attaching according to claim 5 mobile switching centre changing method is characterized in that steps A specifically comprises:
User's travelling carriage uses the temporarily moved subscriber identity that comprises the Internet resources indication to begin to exhale, base station controller determines that the mobile switching centre of the user attaching that this temporarily moved subscriber identity is pointed to is unavailable, then, send connection management CM business request information to it according to local policy optional available mobile switching centre from a plurality of mobile switching centres of its connection;
The mobile switching centre that base station controller is selected finds that this temporarily moved subscriber identity is not that the mobile switching centre of own distribution and the user attaching that distributed the temporarily moved subscriber identity originally is unavailable, then issues temporarily moved subscriber identity assignment messages;
User's travelling carriage is deleted local temporarily moved subscriber identity of preserving after receiving described temporarily moved subscriber identity assignment messages, return the temporarily moved subscriber identity and assigned message, base station controller is transmitted described temporarily moved subscriber identity and has been assigned the mobile switching centre of message to the base station controller selection;
The mobile switching centre that base station controller is selected returns user's travelling carriage connection refused message;
User's travelling carriage sends location update message to base station controller.
8, user attaching according to claim 5 mobile switching centre changing method is characterized in that steps A specifically comprises:
The page response of the temporarily moved subscriber identity that contains Internet resources indications of giving out a contract for a project on user's travelling carriage, base station controller determines that the mobile switching centre of the user attaching that this temporarily moved subscriber identity is pointed to is unavailable, then, send page-response message to it according to local policy optional available mobile switching centre from a plurality of mobile switching centres of its connection;
The mobile switching centre that base station controller is selected finds that this temporarily moved subscriber identity is not that the mobile switching centre of own distribution and the user attaching that distributed the temporarily moved subscriber identity originally is unavailable, then issues temporarily moved subscriber identity assignment messages;
User's travelling carriage is deleted the temporarily moved subscriber identity that this organizational security is deposited after receiving described temporarily moved subscriber identity assignment messages, return the temporarily moved subscriber identity and assigned message, base station controller is transmitted described temporarily moved subscriber identity and has been assigned the mobile switching centre of message to the base station controller selection;
The mobile switching centre that base station controller is selected returns user's travelling carriage connection refused message;
User's travelling carriage sends location update message to base station controller.
9, user attaching according to claim 5 mobile switching centre changing method is characterized in that steps A specifically comprises:
The connectionless information of the temporarily moved subscriber identity that contains Internet resources indications of giving out a contract for a project on user's travelling carriage, base station controller determines that the mobile switching centre of the user attaching that this temporarily moved subscriber identity is pointed to is unavailable, then, transmit described connectionless information to it according to local policy optional available mobile switching centre from a plurality of mobile switching centres of its connection;
The mobile switching centre that described base station controller is selected finds that this temporarily moved subscriber identity is not that the mobile switching centre of own distribution and the user attaching that distributed the temporarily moved subscriber identity originally is unavailable, then issues temporarily moved subscriber identity assignment messages;
User's travelling carriage is deleted the temporarily moved subscriber identity that this organizational security is deposited after receiving described temporarily moved subscriber identity assignment messages, return the temporarily moved subscriber identity and assigned message, base station controller is transmitted the temporarily moved subscriber identity and has been assigned the mobile switching centre of message to the base station controller selection;
The mobile switching centre that base station controller is selected returns connection refused message;
User's travelling carriage sends location update message to base station controller.
10, according to each described user attaching mobile switching centre changing method of claim 5-9, it is characterized in that base station controller described in the steps A determines that by following manner the mobile switching centre of user attaching is unavailable:
The mobile switching centre of base station controller and user attaching sets up and shakes hands, and determines that the mobile switching centre of user attaching is unavailable when shaking hands failure; Or
Link State between the mobile switching centre of base station controller judgement and user attaching when all link failures, determines when mobile switching centre's signalling point is unreachable that the mobile switching centre of user attaching is unavailable; Or
The mobile switching centre of network management system informing base station controller user attaching is unavailable.
11, user attaching according to claim 10 mobile switching centre changing method, it is characterized in that base station controller is selected the mobile switching centre of a mobile switching centre as this user attaching in the following manner among the step B from the mobile switching centre of its connection:
Base station controller is selected one at random from the mobile switching centre of a plurality of operate as normal of its connection; Or
Base station controller selects a load the lightest from the mobile switching centre of a plurality of operate as normal of its connection.
12, user attaching according to claim 11 mobile switching centre changing method is characterized in that step C specifically comprises:
Mobile switching centre returns the temporarily moved subscriber identity assignment messages of carrying the Internet resources indication to user's travelling carriage;
User's travelling carriage returns the temporarily moved subscriber identity to mobile switching centre and has assigned message;
Mobile switching centre upgrades to user's travelling carriage home position and finishes message.
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