CN1238112A

CN1238112A - Using number portability database to solve call tromboning

Info

Publication number: CN1238112A
Application number: CN 97199717
Authority: CN
Inventors: 小J·L·米尔斯
Original assignee: Ericsson Inc
Current assignee: Ericsson Inc
Priority date: 1996-09-16
Filing date: 1997-09-15
Publication date: 1999-12-08
Also published as: AU4352397A; EP0925705A1; WO1998011754A1; AU731960B2

Abstract

A roaming mobile station (30) travels into a new mobile switching center (MSC) (40) coverage area and performs a location update (250) with a home location register (HLR) (90) associated with the mobile station. An application module (240) within the HLR determines that the mobile station is located outside of the home Public Land Mobile Network (PLMN) (310) and updates a serving number portability database (NP-DB) (140) to reflect that the mobile station has been ported to the new PLMN. All incoming calls cause a querying (160) of the NP-DB to identify the new PLMN for the mobile station. In accordance with the retrieved network address (165), the calls are accordingly routed to the new PLMN directly without establishing a call connection to the home PLMN. Whenever the mobile station travels back into the home PLMN, the HLR again updates (320) the NP-DB to remove the previously stored data indicating that the mobile station has been ported.

Description

The cross-reference of the application that the commute that uses number mobility database to solve calling relates to

The application relates to the U. S. application patent sequence number the 08/710th that is entitled as " Optimized Routing ofMobile Calls Within A Telecommunicatiohs Network " (the best routing of the mobile calls in communication network) of submission on September 16th, 1996,346 (number of documents NO27943/96), the U. S. application patent sequence number of submitting on September 16th, 1996 the 08/710th that is entitled as " Optimized Routing ofCalls To Roaming Subscribers Within A TelecommunicationsNetwork " the best routing of roamer's calling (in the communication network to), 349 (number of documents NO27943/100), the U. S. application patent sequence number the 08/710th that is entitled as " Optimized Routing of Terminating Calls Within A MobileTelecommunications Network " (terminal in mobile telecom network connects the best routing of calling) that on September 16th, 1996 submitted to, 347 (number of documents NO27943/98), these applications are all submitted to simultaneously, the U. S. application patent sequence number the 08/656th that is entitled as " RoutingAn Incoming Call To A Ported Mobile Station Within ATelecommunicatiohs Network " (in communication network with the calling call routing to the mobile radio station that berths) that also relates on June 3rd, 1996 and submit to, 723, all be combined as a whole with for referencial use in these all these patents.

Background of invention

The invention technical field

The present invention relates to a kind of communication network, specifically relate to optimization Route Selection the terminating call that mails to travelling carriage.

Relate to the description of technology

Along with the appearance and the development of mobile communication system, telecommunication user is strapped in the catv terminal and the fixed area of communication network communication no longer physically.By the ability that the roaming that increases and interoffice switch, utilize same telephone number and same travelling carriage outwards to send when the mobile subscriber can move between a plurality of Public Land Mobile Nerwork (PLMNs) and call out also receipt of call.Like this, a mobile subscriber can utilize a plurality of service suppliers to accept telecommunications service from a plurality of zones, and its expense of bearing is collected to the account of an independent agreement.And calling party need not must be known mobile subscriber's physical location in order to set up the call connection.Data-signal between visitor location register (VLRs) and home location register (HLR) can upgrade and storing subscriber information automatically, particularly customer position information makes network re-route the suitable mobile switching centre (MSC) that service is provided for the mobile subscriber of roaming to incoming call.And, no matter which MSC is being this travelling carriage service, the HLR that VLR that interrelates with the MSC that service just is provided and travelling carriage are assigned to can communicate the user data with bolt rope necessity, comprises user's characteristic and billing data, so that provide consistent mobile service to travelling carriage.

By convention, if a travelling carriage that interrelates with New York (N.Y.) mobile telecommunications network enters Los Angeles (L.A.), an incoming call of sending to the travelling carriage of roaming at first is routed to the GMSC (gateway mobile switching center) (GMSC) of the Public Land Mobile Nerwork (PLMN) of the N.Y. that interrelates with this travelling carriage.Subsequently, the GMSC of N.Y. sends inquiry to the home location register (HLR) that interrelates with this travelling carriage, to determine the present position of roaming mobile stations.After the identity of having determined for the mobile switching centre (MSC) of the L.A. of the travelling carriage service of this N.Y., the incoming call that receives reroutes to the L.A.MSC that service is provided by N.Y.GMSC, makes that setting up conversation between calling party and roaming mobile stations is connected.

Therefore, if calling party is sent a call set-up signal from L.A., at first between L.A. telecommunications network and the GMSC that serves ancestral home PLMN, set up main line and call out and is connected, set up the second that is returned as the L.A.MSC of travelling carriage service from this GMSC then and call out connection at N.Y..The result calls out and connects in order to set up one between two telecommunication users realizing all being positioned at L.A., call out by the main line that N.Y. set up " commute (tromboning) " to connect.

If this travelling carriage is the permanent L.A. of resting on or reenters L.A.PLMN from N.Y.PLMN, the notion of using the number mobility so can allow this travelling carriage that berths to keep identical telephone number and still can make incoming call reroute to the PLMN of L.A. and do not need to circle and be routed to the PLMN of N.Y..Therefore, the number mobility allows the mobile subscriber to be moored to a new PLMN district or HLR district and not need to change travelling carriage integrated services digital network (MSISDN) number or the telephone number of distributing to the mobile subscriber from present service area.Stored to the number mobility database of the new telecommunication node network address of this travelling carriage service and can select be routed to suitable telecommunication node to incoming call.

Yet,,, call out " commute " and remain a problem for a travelling carriage that roams in the PLMN that is visited even if number mobility central database has been arranged.All kinds of corrupt practices creep in the calling main line connection of this " commute ".To communicate by letter in order satisfying to be positioned between two local users, must to set up and keep unnecessary main line and be connected, the result has wasted valuable Internet resources meaninglessly.In addition, although the called party travelling carriage receives is to be in the incoming call that the calling party terminal in same local access transport district (LATA) is sent with it, L.A. for example, called party travelling carriage are necessary for from his or her ancestral home PLMN to the long-distance telephone expenses of payment that connect the PLMN that is visited.And calling party also can be in the travelling carriage of same PLMN and pay long-distance telephone expenses to N.Y. because of calling out another with it.

Therefore, need a mechanism to guarantee the providing mobile radio communication of service when a mobile calls is sent to a roaming mobile stations, to realize optimized Route Selection.

Brief summary of the invention

The invention discloses a kind of be used for telecommunications network with the mobile calls optimization be routed to the method and system of a roaming mobile stations.

The home location register that is associated with roaming mobile stations (HLR) is from receiving an address update signal for this travelling carriage provides a specific mobile switching centre (MSC) of service.This HLR checks subsequently whether the MSC that service is provided is positioned within the ancestral home Public Land Mobile Nerwork (PLMN) that is associated with this travelling carriage.When the MSC that determines to provide service is positioned at outside the ancestral home PLMN that is associated with this travelling carriage, HLR is communicate by letter with a number mobility database (NP-DB) for ancestral home PLMN service to this response, is used for indicating this travelling carriage and has been docked in data among this MSC that service is provided so that store.These data comprise the network address that representative provides the MSC of service.Then, by inquiring about this NP-DB,, and need not pass through ancestral home PLMN for the telecommunication node that starts of calling party Terminal Service can be determined the position of present travelling carriage and be routed directly to the MSC that service is provided calling out to connect.

When travelling carriage returned ancestral home PLMN, the MSC that is associated with ancestral home PLMN carried out another location update operations to its HLR.After determining new MSC and ancestral home PLMN be associated, HLR and NP-DB communicate with cancel former store be used to the data of indicating mobile radio station once to berth.

Therefore, when travelling carriage roams into beyond its ancestral home PLMN, just implement virtual or temporary transient berthing.

The accompanying drawing summary

With reference to the accompanying drawings with the back to its detailed description can be more complete understanding method and apparatus of the present invention.

Fig. 1 is the communication network piece figure of a plurality of Public Land Mobile Nerwork of explanation (PLMNs) and public switch telephone network (PSTN) interconnection.

Fig. 2 is the calcspar that explanation is routed to a terminating call communication network of a travelling carriage that berths.

To be explanation set up a calcspar of calling out the communication network of the commute main line connection that is connected to Fig. 3 between a calling party terminal and a roaming called party travelling carriage.

Fig. 4 is the calcspar that a home location register that interrelates with roaming mobile stations of explanation (HLR) upgrades the communication network of number mobility database (NP-DB).

Fig. 5 is the calcspar of communication network that explanation is connected to an exhalation from the telecommunication node that starts the optimization route of a roaming mobile stations.

Accompanying drawing describes in detail

Fig. 1 is the calcspar of explanation a plurality of Public Land Mobile Nerwork (PLMNs) 10a-10b and public switch telephone network (PSTN) 20 network interconnections.A travelling carriage 30 (also can be called portable terminal or equipment) is associated one among the PLMNs10 with it and as ancestral home PLMN10.In each PLMN10, for example, PLMN10a has a plurality of different mobile switching centres (MSCs only draws in each PLMN10 of Fig. 1) 40 for the geographic area service that network covered.Travelling carriage 30 with MSCs40 in a wireless base station (not shown) that is connected communicate by air communication link 50.This travelling carriage that provides service by PLMN10a is mode and other the wired and wireless terminal communications by being connected with PSTN20 subsequently.Access tandem in PSTN (AT) 60 is routed to a catv terminal 15 to the mobile calls that produces from a PLMN10a, catv terminal 15 is accepted certain the local switch (LE among the PSTN20, in Fig. 1, only draw one of them) 70 service, perhaps GMSC (gateway mobile switching center) (GMSC) 80b by it is routed to another PLMN10b.

For the incoming call that a target is a travelling carriage 30, incoming call at first is routed to the GMSC80a into ancestral home PLMN10a service.The GMSC80a analysis package is contained in the telephone number in the incoming call, and for example a mobile user comprehensive service digital net (MSISDN) number is determined home location register (HLR) 90a that is made travelling carriage 30 interrelate with target then.This GMSC80a sends the signal 100 of a request route information subsequently to the home location register 90a of this travelling carriage 30 of having determined.This HLR90a (it is being stored user profile and is following the tracks of the current position of travelling carriage 30) just is being roaming number of travelling carriage 30 serving mobile switching center (MSC) 40a request by signal 110 to now then.As a result, provide the MSC40a of service to return a roaming number to HLR90a.This roaming number that is returned has been represented the MSC40a that service is provided for travelling carriage 30.When receiving this roaming number, GMSC80a sends this incoming call to the MSC40a that service just is provided.Provide the MSC40a of service to be connected with the travelling carriage 30 foundation conversations of the MSC service area that is positioned at it subsequently.

Along with the continuous development and the increase of number of mobile users purpose of mobile communication technology, the new ideas of a kind of being called as " number mobility " become and are popular.The notion of number mobility allows a mobile subscriber to reorientate or move to a new PLMN district or HLR district (scheming the arrow 35 of getting the bid) and need not to change travelling carriage integrated services digital network (MSISDN) number or the telephone number of distributing to the mobile subscriber from present service area.By not changing the Mobile Subscriber International ISDN Number of distribution, the mobile subscriber does not just need to notify his friend and his new Mobile Subscriber International ISDN Number of related personnel pretty troublesomely.

The number mobility also allows more effectively to utilize and network resource administration better.If a PLMN comprises a plurality of HLRs, and the carrying in network or the skewness of capacity weighing apparatus, number mobility help shifting some User Agreements or user profile does not need to change the Mobile Subscriber International ISDN Number of distributing to relevant travelling carriage to the lighter HLR of another load from a HLR of overload.By redistributing some user profile and balanced carrying distribution, PLMN can manage its resource and carrying better.

As previously described, can be correctly to be routed to the MSC40a that service just is provided to an incoming call be that it shows which HLR in the PLMN10 of ancestral home has stored necessary user profile because comprise a value in the number of being dialled to GMSC.Therefore, GMSC80 analyzes the Mobile Subscriber International ISDN Number that receives, and determines appropriate H LR90, from fixed HLR90 request route instruction, then incoming call is routed to suitable MSC.

As by reorientate 35 shown, travelling carriage 30 stops the predetermined protocol of it and current PLMN10a and registers to new PLMN10b.Yet because the Mobile Subscriber International ISDN Number that is assigned at travelling carriage is not updated to new PLMN10b of reflection and the number of HLR90b, all incoming calls in the future still are routed to original PLMN10a.The GMSC that is positioned at PLMN10a can not re-route the travelling carriage 30 of reorientating to the incoming signal that receives, because GMSC80 can not be by only analyzing the correct HLR90b that the Mobile Subscriber International ISDN Number that receives is determined storing subscriber information.

With reference to figure 2 explanations a terminal call is rerouted to the travelling carriage 30 that berths.According to the notion of number mobility, what interrelate with the communication network that service is provided is a new central database.When a specific travelling carriage during from second PLMN10b of first PLMN10a shift-in, this is called record 145 of centre data library storage of number mobility database (NP-DB) 140 again, and its handle is distributed to the Mobile Subscriber International ISDN Number of travelling carriage and new PLMN10b or the new HLR90b that serves for this travelling carriage that berths 30 more specifically and is associated.Therefore, an operation sequence 130 that interrelates with NP-DB140 is upgraded record 145 with the reflection travelling carriage and has been entered into new PLMN10b.

Then, when a telecommunication terminal 15 requires to set up one with the travelling carriage 30 that berths and calls out when being connected by dialing the Mobile Subscriber International ISDN Number of distributing to mobile subscriber 30, for 130 inquiries of an application module in the telecommunication node 70 that starts of calling terminal 15 services and dial the NP-DB140 that Mobile Subscriber International ISDN Number is got in touch.By data base querying 160, the telecommunication node that starts (for example local switch (LE) in a PSTN or the mobile switching centre (MSC) in a PSTN) determines that the new PLMN10b that serves for the travelling carriage 30 that berths now also directly sends an exhalation to new PLMN10b with HLR90b and is connected.Represent new PLMN10b or the network address of the GMSC80b that more specifically says so is included in to breathe out and sets up in the signal (a for example initial address message (IAM)) and be used as the side's talked about number (CDPn).The Mobile Subscriber International ISDN Number of the travelling carriage that the representative of initially dialing is berthed also is included in some parameters of call set-up signal.In the IAM signal, such parameters optimization can comprise a general address parameter (GAP).By GAP, Mobile Subscriber International ISDN Number carries new PLMN10b.Because new PLMN10b has been pointed in the particular network address, the IAM signal just is routed on the GMSC80b that serves into PLMN10b.The network address that receives by further analysis of PLMN10b is to determine which HLR and the travelling carriage 30 that berths and interrelate and to send a route requests command signal 100 to the HLR90b that determines subsequently.In signal 100, also comprised the Mobile Subscriber International ISDN Number that is comprised in the IAM signal that is receiving.HLR then extracts involved Mobile Subscriber International ISDN Number again and determines the MSC40b that is serving for travelling carriage 30, sends a roaming number signal 110 to this MSC40b that determines then.As a result, roaming number at first is returned HLR, thereby returns GMSC80b again.As the side's talked about number (CDPn), the incoming call that receives re-routes the MSC40b that is just serving for travelling carriage 30 by GMSC80b the roaming number that receives.Therefore, at GMSC80b with provide the calling of having set up a rerouting between the MSC40b of service to connect 120.This travelling carriage 30 of MSC40b paging of service just is being provided then and is setting up a conversation and connecting by a wireless channel.

The result, although the Mobile Subscriber International ISDN Number that distributes still reflects PLMN10a as ancestral home PLMN, but, call out for one and just connect that correctly to be routed to current and travelling carriage 30 that interrelate and as second PLMN10b of new ancestral home PLMN by the telecommunication node inquiry NP-DB140 that starts.

Even if terminal call is routed to a travelling carriage that berths, be connected efficient and the waste problem that still has calling " commute " with a calling of roaming mobile stations by NP-DB140.The commute of main line connection when the calling of setting up between the called party travelling carriage of calling party terminal and roaming with reference to figure 3 explanation is connected.When requiring to set up one with travelling carriage 30, a calling party terminal 15 calls out when being connected the ancestral home PLMN10 (signal 160) that the application module 130 inquiry NP-DB140 in the telecommunication node 70 that starts interrelate with definite and called party travelling carriage 30.As indicated above, calling party terminal 15 may be one provides the catv terminal of service by wired local switch, also may be a calling party travelling carriage that service is provided by mobile switching centre (MSC).

No matter whether the called party number berthed, and representing ancestral home PLMN or more specifically saying so provides the network address of the GMSC80 of service all will be returned to the telecommunication node 70 that proposes inquiry.If called party travelling carriage 30 was once berthed, the new ancestral home PLMN10b of network address representative that then returns.Otherwise, the original or old ancestral home PLMN10a of network address representative that returns.

Be positioned at second LATA310 if the calling party terminal is arranged in first local access transport district (LATA or more generally be called as an area code) 300 with the called party travelling carriage that a PLMN interrelates but just roaming in first LATA300 now, this calling of just having set up the waste of a poor efficiency connects.For example, travelling carriage 30 interrelates with N.Y.LATA or PLMN310, and roams in now among L.A.LATA or the PLMN300.If another telecommunication terminal 15 requests of L.A.LATA or PLMN that are positioned at are set up callings with roaming mobile stations 30 and are connected, 170 (representing) of article one calling connection with solid line for example main line connection just at L.A. telecommunication node 70 and provide for ancestral home PLMN between the N.Y.GMSC80 of service and set up.This N.Y.GMSC80 inquires about the HLR90 that interrelates with called party travelling carriage 30 by sending to a signal 180 of the HLR90 request route instruction of having determined.This HLR follows the tracks of the MSC40 that service just is being provided for travelling carriage 30 now, because as long as travelling carriage 30 enters the new MSC area of coverage, the MSC that provides mobile service for this specific geographical area is the HLR90 enforcing location renewal to interrelating with travelling carriage just.The location update signal that sends is notified to the current location of travelling carriage in advancing HLR90 and asks necessary user profile from HLR90.Thereby HLR90 determines that L.A.MSC40 is being roaming mobile stations 30 services, sends the signal 190 of a request roaming number then to the L.A.MSC40 that service just is provided.This L.A.MSC40 returns a signal 190 and gives HLR90, and this signal contains the roaming number of the MSC40 that service just is provided that expression asks.HLR90 returns the roaming number that receives to GMSC80 subsequently.Because the roaming number that receives is represented L.A.MSC40, this has just set up the second calling connection of returning L.A.MSC40 from N.Y.GMSC80.The result set up one and calls out and connect in order to be positioned at local terminal rooms at two, has but set up the calling of wasting through the poor efficiency of N.Y.GMSC80 and has connected.

Fig. 4 is one the calcspar that upgrades a number mobility database (NP-DB) 140 according to the home location register (HLR) 90 that interrelates with roaming mobile stations 30 of the present invention has been described.As long as travelling carriage 40 enters a new MSC area of coverage, the MSC40 that provides the service of moving for this geographic area is the HLR90 enforcing location renewal to interrelating with travelling carriage 30 just.Travelling carriage 30 at first sends an identification number, for example an IMSI International Mobile Subscriber Identity (IMSI) number to the MSC40 that service is provided.As destination address, provide the MSC40 of service to send a location update signal 250 by an IMSI number that receives.Because an IMSI number sequence generally is to distribute to a HLR, by analyzing specific I MSI number, the communication network that is connecting a for example Signaling System 7(SS-7) (SS7) communication network can be routed to the HLR90 that interrelates with travelling carriage 30 to the location update signal 250 that sends out.Also comprise the network address that a representative is just providing the MSC40 of service in this location update signal 250, this network address indicates the present position of travelling carriage 30 to HLR90, and to the necessary user profile of HLR90 request.The Mobile Subscriber International ISDN Number that these user profile comprise application characteristic data, billing data and interrelate with travelling carriage 30.After receiving location update signal 250 from the new MSC40 that service is provided, return a signal 260 that carries necessary user profile and give the MSC40 that service just is being provided.Be arranged in the network address that application module 240 subsequent analysis of HLR90 receive to determine whether this new MSC40 that service is provided is positioned at outside the PLMN of ancestral home.For example, new MSC40 that service is provided and L.A.PLMN300 interrelates if travelling carriage 30 and N.Y.PLMN310 interrelate, and application module 240 is just roaming in the route of going into to exhale employing optimization of also further definite arrival roaming mobile stations 30 outside the PLMN310 of ancestral home with more economical effective with regard to definite travelling carriages 30 so.Application module 240 sends one to the NP-DB140 that serves ancestral home PLMN does not as a result have signal 270, for example signal based on signal controlling coupling part (SCCP) of connection.The nothing that sends connects and comprises the network address that representative just is being the L.A.MSC40 of travelling carriage 30 services in the signal 270.Register 145 usefulness in NP-DB140 are represented L.A.MSC40 and are used the L.A.PLMN300 network address indirectly, upgrade as the new ancestral home PLMN of travelling carriage 30.Therefore, with regard to NP-DB140, travelling carriage 30 has been moored to L.A.PLMN300 from N.Y.PLMN310, and travelling carriage 30 seems to have stopped with the predetermined protocol of N.Y.PLMN310 and L.A.PLMN300 has set up new predetermined protocol.After successfully finishing transfer, an inverse signal 280 that has successfully return code is sent to HLR90.

Illustrate that with reference to figure 5 the 70 pairs of exhalation of telecommunication node of starting are connected to the routing optimality of roaming mobile station 40b.As described in prior figures 4, when the travelling carriage 30 that interrelates with N.Y.PLMN310 was roamed in L.A.PLMN300, NP-DB140 was upgraded with the network address by the representative L.A.MSC40b of roaming mobile stations 30 services by N.Y.HLR90.After this, L.A. calling terminal 15 requests that for example interrelate with the telecommunication node 70 that starts of L.A. when any one telecommunication terminal and roaming mobile stations 30 are set up one and are called out when being connected, and the application module 130 that is arranged in the telecommunication node 70 that starts is just inquired about the NP-DB140 that (signal 160) and called number interrelate in common mode.When answering, NP-DB is just returning to the network address of being upgraded by HLR90 and representative the telecommunication node 70 that starts (signal 165) of the request of sending for the L.A.MSC40b network address of travelling carriage 30 services.A call set-up signal for example IAM signal directly sends to the MSC40b that service just is being provided to the network address that receives as new destination address.The telephone number that interrelates with roaming mobile stations 30 further is included in certain parameter of call set-up signal of emission.These parameters can be included in the general address parameter (GA) in the IAM signal.Because this particular network address is wired number that a representative is just providing the L.A.MSC40b of service, the L.A.GMSC (not shown) that call set-up signal directly is routed to this specific MSC40b rather than is routed to and is just providing the L.A.MSC40b of service to interrelate.Therefore do not need the HLR inquiry.

So just having set up one between the MSC40b of service at the telecommunication node 70 and providing of starting calls out and connects 270.Provide the MSC40b of service from the IAM signal that receives, to extract Mobile Subscriber International ISDN Number and the definite corresponding mobile station of just roaming of representing travelling carriage 30 subsequently at its area of coverage.After determining, the L.A.MSC40b mobile paging station 30 of service is provided and between incoming call side's terminal 15 and roaming mobile stations 30, sets up a calling to be connected.So just be connected in the calling of having set up an optimization between the calling party terminal of this locality and the called party travelling carriage at two.

When travelling carriage 30 returns ancestral home PLMN, N.Y.PLMN310 for example, the MSC40a that interrelates with ancestral home PLMN launches another location update signal 250, to the reposition of HLR90 notice travelling carriage 30.Because also be related with N.Y.PLMN310 by the IMSI number that travelling carriage sent and interrelate with it, location update signal just correctly is routed to N.Y.HLR90.This HLR90 is subsequently to the new necessary user profile (signal 270) of MSC40a emission that service just is provided.Then, the application module 240 that is arranged in HLR90 is determined and is arranged in the new MSC40a that service just is provided of ancestral home PLMN310.The result, application module 240 is launched another signal 320 so that berth data of experience of the indication travelling carriage 30 of storage before removing to NP-DB140 from register 145, and represents the ancestral home PLMN310 or the content of the network address replacement central database of ancestral home GMSC more specifically with one.NP-DB140 postbacks a signal 330 to HLR90, and notice HLR90 upgrades successfully.From then on, as long as any one original telecommunication node is inquired about route instruction to NP-DB, will return a network address that is represented as the GMSC (not drawing among Fig. 5) of N.Y.PLMN310 service.Therefore incoming call just is routed to the N.Y.MSC40a that serves for travelling carriage 30 till now into the GMSC and the final route of N.Y.PLMN310 service.

When the new MSC40a that service is provided also was positioned at outside the PLMN310 of ancestral home, central database was further upgraded by the network address of the new MSC40a that service is provided of representative.Similar to previously described method, just carry out subsequently calling is optimized to the new MSC40a that service is provided of route.

Although a cover preferred embodiment of method and apparatus of the present invention has been described with the detailed presentations of front in conjunction with the accompanying drawings, this is construed as the present invention and is not limited to the embodiment that disclosed, but can not break away from that the present invention sets forth and by the prerequisite of the defined spirit of following claim under carry out a large amount of readjusting, revise and replace.

Claims

1. follow the tracks of a kind of method of a travelling carriage current location in mobile telecommunications network, described method may further comprise the steps:

Receive first signal at a home location register (HLR) that is associated with described travelling carriage, it just is being the identify label of first telecommunication node of described travelling carriage service now that described first signal has indicated one;

Described HLR determines that described first telecommunication node is positioned at outside the ancestral home Public Land Mobile Nerwork (PLMN) that is associated with described travelling carriage; And

To described definite response is to upgrade a central database that is associated with described ancestral home PLMN so that storage is indicated as being the data of described first telecommunication node of described travelling carriage service from described HLR.

2. the method for claim 1 further comprises following steps:

Receive second signal that indicates second the telecommunication node identify label that is described travelling carriage service now at described HLR;

Described HLR determines that described second telecommunication node is positioned at described ancestral home PLMN;

Be that upgrading described central database, to indicate described first telecommunication node with elimination be the described data that service is being provided to described travelling carriage to described definite response.

3. the process of claim 1 wherein that described first telecommunication node comprises one and is being described travelling carriage serving mobile switching center (MSC).

4. the process of claim 1 wherein that described first signal comprises a location update signal based on MAP (MAP).

5. the process of claim 1 wherein that described central database comprises a number mobility database (NP-DB).

6. the method for claim 1, the step of the described central database of wherein said renewal further comprises from described HLR and sends a step based on the connectionless signal of signaling control connection part (SCCP) to described central database, and described signal based on SCCP comprises the network address of described first telecommunication node of representative.

7. the process of claim 1 wherein that described first signal further comprises the network address of described first telecommunication node of representative.

8. a storage is used for being designated the method for a mobile communication node data of specific travelling carriage service, and described method comprises following steps:

Receive a sign in an ancestral home mobile telecom network that interrelates with described specific travelling carriage, described sign has indicated described mobile communication node and has been described travelling carriage service;

Determine that described mobile communication node and described ancestral home mobile telecom network do not have and get in touch;

Currently just remove to upgrade a central database that interrelates with described ancestral home mobile telecom network with indicating for the data of the described mobile communication node of described travelling carriage service.

9. the method for claim 8, the step of the described sign of wherein said reception is finished by a home location register that interrelates with described travelling carriage (HLR).

10. the method for claim 9, the step of the described central database of wherein said renewal is finished by described HLR.

11. the method for claim 10, the step of the described central database of wherein said renewal further comprise described HLR has the nothing connection signal of described data by one of the communication network transmission of the Signaling System 7(SS-7) of a connection step.

12. the method for claim 8, wherein said ancestral home mobile telecom network comprise an ancestral home Public Land Mobile Nerwork (PLMN) that interrelates with described travelling carriage.

13. the method for claim 8, wherein said sign comprise a location update signal by described mobile communication node emission.

14. the method for claim 13, wherein said location update signal comprise the network address of a described mobile communication node of representative.

15. comprising one, the method for claim 8, wherein said mobile communication node be described travelling carriage serving mobile switching center (MSC).

16. one in central database storage be used for identifying the system of data of the mobile communication node that is a specific travelling carriage service, described travelling carriage and described central database and an ancestral home mobile telecom network interrelate, this system comprises:

Receive the device of a sign in the described ancestral home mobile telecom network that interrelates with described specific travelling carriage, described sign has indicated described mobile communication node being described travelling carriage service;

Determine described telecommunication node and the unrelated device of described ancestral home mobile telecom network; With

To the device that described decision responds, this response is to remove to upgrade the described central database that is associated with described ancestral home mobile telecom network with the data that just indicate to the described mobile communication node of described travelling carriage service.

17. the system of claim 16, the wherein said device that is used to receive described sign comprises a home location register that interrelates with described travelling carriage (HLR).

18. the system of claim 17, the device of the described central database of wherein said renewal comprises described HLR.

19. the system of claim 18, the Signaling System 7(SS-7) communication network that the device of the described central database of wherein said renewal further comprises by a connection sends a device that has the nothing connection signal of described data to described central database.

20. the system of claim 16, wherein said ancestral home mobile telecom network comprises an ancestral home land mobile network (PLMN) that is associated with described travelling carriage.

21. the system of claim 16, wherein said sign comprise a location update signal by described mobile communication node emission.

22. the system of claim 21, wherein said location update signal comprises the network address of a described mobile communication node of representative.

23. the system of claim 16, wherein said mobile communication node comprises one and is described travelling carriage serving mobile switching center (MSC).