CN101047969B

CN101047969B - Method for channel call in mobile communication network

Info

Publication number: CN101047969B
Application number: CN200610071028XA
Authority: CN
Inventors: 侯建华; 葛云山; 江潮; 王洪; 周莹新
Original assignee: Motorola Inc
Current assignee: Motorola Mobility LLC; Google Technology Holdings LLC
Priority date: 2006-03-31
Filing date: 2006-03-31
Publication date: 2011-01-12
Anticipated expiration: 2026-03-31
Also published as: DE112007000778T5; WO2007117825A3; DE112007000778B4; CN101047969A; WO2007117825A2

Abstract

A routing call method in mobile communications network is helpful to reduce the frequency of call failures. The method includes that the default MSC (310) handles the first request of roaming numbers received from HLR (315) and associated with MS. The first request includes the identification of MS to register NRI of the first pool MSC. NRI is used to identify the first pool MSC (310) in the default MSC. Then, the default MSC Pool (310) sends the second request of roaming number related to the mobile station from the default MSC to the first pool one.

Description

The method of routing call in mobile communications network

Technical field

The present invention relates generally to call is routed to mobile device.Especially, although be not exclusively, the present invention relates to use attaching position register (HLR) by mobile switching centre (MSC) routing call in global system for mobile communications (GSM) network.

Background technology

Because a variety of causes is made the call of mobile phone and possibly can't be connected.Called mobile phones may just hurry, shuts down, outside the wireless network scope or otherwise unreachable.In this case, the calling party repeatedly carries out additional calls to called mobile phones usually, till call through and called mobile phones are replied.Because waste calling party's time (calling party is the re-dialing telephone dial train continuously) and because waste must repeat route with the extra voice call of processing (it receives higher network priority usually) up to called phone by the wireless network resource till replying, carry out such repetition additional calls and be inconvenience with problematic.

In global system for mobile communications (GSM) network, use attaching position register (HLR) to route the call to the mobile phone that in network, moves.The relevant specific data where moved of mobile phone in network of HLR storage.Therefore, when new wireless access network (RAN) node of mobile phone roaming in the GSM network, phone is connected to the mobile switching centre (MSC) relevant with this RAN node.This phone of HLR that MSC identification telephone and notice are relevant with this phone links to each other with MSC in operation.If receive the incoming call be directed to this phone subsequently in network, then network is at first got in touch the HLR related with this phone, with the identity of the MSC of the radio communication of knowing current management and this phone.Then, by MSC incoming call is routed to this phone.

Yet MSC is the generating technique problem sometimes, so MSC just becomes (out of service) temporarily out of service.When the technical problem of MSC occurs suddenly or technical problem is instantaneous and when repeating to take place, just can't connect the calling that the mobile phone relevant with MSC out of service carries out.This is because HLR only specifies single MSC for specific mobile phone usually.Therefore, when MSC becomes out of service suddenly, will all can't connect by all incoming calls that this MSC is routed to the phone relevant with this MSC under the normal condition.

Summary of the invention

According to an aspect, the present invention is a kind of method of routing call in mobile communications network.Described method comprises: handle first request for the roaming number that is associated with travelling carriage (MS) that receives from attaching position register (HLR) in acquiescence mobile switching centre (MSC).First request for roaming number comprises the network resource identifier (NRI) of identification MS to the first pond MSC of its registration (first pool MSC).Then, use NRI to discern the first pond MSC in default MSC.To be sent to the first pond MSC for second request of the roaming number that is associated with travelling carriage.

Therefore, embodiments of the invention make it possible to reduce the frequency of call failure in the mobile communications network.In the given pool area (pool area) that covers called mobile station, have under the situation of a plurality of mobile switching centres (MSC) operation, will at first handle by a default MSC for the all-calls of the travelling carriage that in pool area, moves.Default MSC is not limited to the request to the roaming number of travelling carriage is sent to that MSC that called mobile station was registered to last time.On the contrary, default MSC can repeatedly be got in touch each MSC among a plurality of MSC that move in pool area, can provide roaming number for specific called mobile station up to one of them MSC.By reducing frequency of call failure, embodiments of the present invention make it possible to realize the improved network user's service quality (QoS) and more effectively use Internet resources.

Description of drawings

For the ease of understanding the present invention and can actual implement, below illustrative embodiments that explanation is described with reference to the accompanying drawings, in different figure, similarly Reference numeral is represented identical or functionally similar parts.Accompanying drawing and following detailed description are included in the specification and constitute the part of specification, and further example is according to the embodiment of the present invention and explain various principle and advantages for it.In the accompanying drawings:

The schematic diagram of the assembly of Fig. 1 to be example link to each other the caller platform with travelling carriage (MS) typical global system for mobile communications (GSM) voice data communications network;

Fig. 2 is the schematic diagram of the assembly of the example conventional GSM that comprises pool area;

Fig. 3 be example according to the embodiment of the present invention, comprise the schematic diagram of assembly of the gsm system of pool area and acquiescence mobile switching centre (MSC);

Fig. 4 is example is sent to the MAP_UPDATE_LOCATION message of attaching position register (HLR) according to the embodiment of the present invention from the first pond MSC a schematic diagram;

Fig. 5 is the example message sequence chart of the method for routing call in comprising the mobile communications network of pool area according to the embodiment of the present invention.

Fig. 6 be example according to the embodiment of the present invention, the general flow figure of the method for the routing call mobile communications network seen from the default MSC angle.

It will be understood by those skilled in the art that for easy and clear for the purpose of assembly among the figure is shown, but not necessarily draw in proportion.For example, the size of some parts by exaggerative, is understood embodiments of the present invention with help with respect to miscellaneous part among the figure.

Embodiment

Before describing, will be appreciated that described execution mode relates generally to the method step relevant with routing call in mobile communications network and the combination of apparatus assembly according to the specific embodiment of the present invention.Therefore, in due course, represent apparatus assembly and method step with conventional symbols in the accompanying drawings, those skilled in the art only shown those specific detail relevant, so that can can't not distinguish of the present invention disclosing and the details that it will be apparent to those skilled in the art after having read the explanation here with understanding the present invention.

In this document, can use separately such as relational terms such as a left side and the right side, first and second, front and rears, so that entity or action are different from another entity or action, and not necessarily require or hint any actual relationship or order between such entity or the action.Term " comprises " or its any distortion is intended to cover non-comprising of monopolizing, thereby the process, method, article or the equipment that comprise series of elements are not to include only listed those elements but also comprise and clearly not listing or such other intrinsic elements of process, method, article or equipment.Do not having under the situation of more restrictions, " comprising one ... " appears before certain element and be not precluded within process, method, article or the equipment that comprises this element and have extra identical element.

Referring to Fig. 1, the schematic diagram of the assembly of typical global system for mobile communications (GSM) the voice data communications network 100 that caller platform 105 is linked to each other with travelling carriage (MS) 110 is shown.Described caller platform 105 can be the platform that can be connected to any kind of the public land mobile net network (PLMN) 115 that MS 100 moves therein, for example mobile phone or catv terminal.

In order to start from caller platform 105 to travelling carriage 110 calling, caller platform 105 is at first set up signal with incoming call, and initial address message (IAM) for example sends to the GMSC (gateway mobile switching center) (GMSC) 120 relevant with PLMN 115.If caller platform 105 is another mobile devices, then IAM is routed to GMSC 120 by another PLMN.If caller platform 105 is catv terminals, then IAM is routed to GMSC 120 by local switch.

After receiving that signal is set up in incoming call, GMSC 120 is sent to the attaching position register (HLR) 125 relevant with this travelling carriage 110 with MAP (MAP) call setup message.HLR 125 safeguards the user data relevant with this called mobile station 110, as mobile user comprehensive service digital net (MSISDN) number.HLR 125 also is maintained as this travelling carriage 110 mobile switching centre (MSC) 130 of current service and the identity of corresponding visitor location register (MSC/VLR) is provided.The MAP call setup message that sends to HLR 125 comprises the MAP_SEND_ROUTING_INFORMATION message of the current routing iinformation that for example request and travelling carriage 110 are relevant.

The call setup message that response receives, HLR 125 use the information of the MSISDN visit of called mobile station 110 about the current location of travelling carriage 110, and discern current MSC 130 for travelling carriage 110 services.Subsequently, HLR 125 sends a message to MSC 130, for example the MAP_PROVIDE_ROAMING_NUMBER message of the roaming number that request is relevant with travelling carriage 110.MSC 130 responds (roaming number that comprises MSC 130) by MAP message being sent it back HLR 125, and HLR 125 is transmitted to GSMC 120 with roaming number then.So by using roaming number, GMSC 120 can set up from caller platform 105 to GMSC 120 and directly connect to the calling of MSC 130.At last, MSC 130 mobile paging stations 110 also distribute wireless channel, so as can be between caller platform 105 and travelling carriage 110 call establishment.

Referring to Fig. 2, the schematic diagram of the assembly of the conventional gsm system 200 that comprises pool area 205 is shown.According to third generation partner program (3GPP) standard 23.236, pool area is that travelling carriage can need not to change the zone of roaming under the situation of its service core net (CN) node (for example MSC) therein.Therefore, pool area can reduce between the CN node frequency of upgrading, switching and redistribute, and reduces HLR and upgrade traffic carrying capacity.

Pool area 205 is served by one or more CN nodes, as a MSC 130, the 2nd MSC 210 and the 3rd MSC 215 of all parallel runnings.All travelling carriages such as the travelling carriage 110 of operation in pool area 205 are controlled by wireless access network (RAN) node 220.RAN node 220 can comprise for example radio network controller (RNC) or base station controller (BSC).

According to 3GPP standard 23.236, when the MSC such as MSC 130 can't move, if for example MSC 130 since technical problem and out of service suddenly can't connect to the calling of the travelling carriage of managing by this MSC out of service 130 so.And need wait until that to the calling party of such travelling carriage called mobile station carries out regular position and upgrade (this may need for example to surpass six minutes stand-by period), wait until that perhaps called mobile station carries out mobile originating.If called mobile station is carried out mobile originating, called mobile station is the executing location renewal process at first, and a new MSC will be assigned to this called mobile station.After new MSC was distributed to this called mobile station, other mobile terminatings are called out will can connect this called mobile station again.

Referring to Fig. 3, illustrate according to the embodiment of the present invention, comprise the schematic diagram of assembly of the gsm system 300 of pool area 305 and default MSC 310.Different with prior art systems described above 200, in system 300, the address information that the HLR 315 of the information that storage is relevant with the travelling carriage that links to each other with specific RAN node 320 in the pool area 305 in operation will only store and default MSC 310 is correlated with.That is, no matter specific RAN node 320 is by first pond MSC325 in the pool area 305 or second pond MSC330 management, and the HLR 315 of the travelling carriage that links to each other with specific RAN node 320 is the relevant address information of storage and default MSC 310 only.

Referring to Fig. 4, schematic diagram has illustrated the MAP_UPDATE_LOCATION message that is sent to HLR 315 according to the embodiment of the present invention from the first pond MSC.When travelling carriage was linked pool area 305 for the first time, it can be managed by the first pond MSC325.Yet as shown in Figure 4, when the first pond MSC325 was sent to the HLR 315 relevant with travelling carriage with MAP_UPDATE_LOCATION message, message comprised the address of default MSC 310 and does not comprise the address of the first pond MSC325.MAP_UPDATE_LOCATION message also comprises the network resource identifier (NRI) of the first pond MSC325.As detailed below, then default MSC 310 be used to the request for roaming number is routed to the management and the specific MSC that communicates by letter (for example first pond MSC325) of specific travelling carriage.

Referring to Fig. 5, message sequence chart 500 comprises the method for routing call in the mobile communications network that comprises pool area 305 according to the embodiment of the present invention.Online 505 places send to attaching position register (HLR) 315 such as the call setup message of MAP_SEND_ROUTING_INFORMATION message from GMSC (gateway mobile switching center) (GMSC) 510.This message identification is by the called mobile station of HLR 315 management.Then, online 515 places, the response call setup message, HLR 315 will be sent to acquiescence mobile switching centre (MSC) 310 to first request of the roaming number relevant with travelling carriage.For example, first request to roaming number can be a MAP_PROVIDE_ROAMING_NUMBER message.Online 520 places, default MSC 310 will send to the first pond MSC325 to second request of roaming number.The MSC that the first pond MSC325 normally was registered to as the travelling carriage of call setup message main body last time.

Out of service or otherwise can't handle request from default MSC 310 time as the first pond MSC325, can not receive for second request responding in default MSC 310 at roaming number.Yet because the first pond MSC325 operates in pool area 305, other MSC also attempt linking to each other to the RAN node that its travelling carriage of calling out is served in operation with for GMSC 310.

According to embodiments of the invention, default MSC 310 is safeguarded the tabulation of the alternative MSC that identification also moves with the first pond MSC325 in the identical tanks zone.Therefore, when not receiving that at second request responding of roaming number the time, default MSC 310 is chosen in the second pond MSC330 in the pool area 305 that covers called mobile station from tabulation.Online 525 places, default MSC 310 will be sent to the second pond MSC330 for the 3rd request of the roaming number relevant with called mobile station.If the second pond MSC330 is not out of service, it will receive and handle the 3rd request to roaming number.Yet because called mobile station is not registered to the second pond MSC330, the second pond MSC330 can not provide the roaming number relevant with called mobile station immediately.Therefore, online 530 places, the second pond MSC330 will send to HLR 315 to the request (for example MAP_RESTORE_DATA message) of the additional customer data relevant with called mobile station.Then, additional customer's data that HLR 315 will be relevant with called mobile station (for example international mobile subscriber identity (IMSI)) record sends back the second pond MSC330.Online 535 places, the second pond MSC330 sends the roaming number relevant with called mobile station to HLR 315.At last, default MSC 310 sends to HLR 315 with roaming number.So HLR 315 can respond the call setup message from GMSC 310, and can be by the calling of GMSC 310 and second pond MSC330 foundation and called mobile station.

Those skilled in the art can understand, if when default MSC 310 transmission are asked for the 3rd of roaming number, the second pond MSC330 shown in the message sequence chart 500 is also out of service, and default MSC 310 can be selected also the 3rd MSC (not shown) in the pool area that covers called mobile station simply so.Therefore, according to embodiments of the invention, HLR 315 can repeat the process that a plurality of requests to roaming number is sent to a plurality of MSC in the given pool area 305, till one of them MSC offers default MSC 310 with suitable roaming number.

According to the embodiment of the present invention, default MSC 310 may be the crucial failed point in the pool area 305.That is,, can't connect for the calling of all travelling carriages of operation in pool area 305 so if default MSC 310 is out of service.Therefore, as is known to the person skilled in the art, can use mismanage process, improve the reliability of default MSC 310 with respect to other MSC ponds 325,330 such as equipment redundancy and 1+1 or N+1 fault-tolerant configuration.

Referring to Fig. 6, the method 600 of the routing call mobile communications network that general flow illustrates according to the embodiment of the present invention, see from default MSC 310 angles.In step 605, default MSC 310 is handled first request for the roaming number of called MS that receives from HLR 315.First request for roaming number comprises the network resource identifier (NRI) of identification management to the first pond MSC325 of the calling of called MS.In step 610, default MSC 310 uses the NRI in first request to discern the first pond MSC325.In step 615, default MSC 310 will be sent to the first pond MSC325 for second request of the roaming number of MS subsequently.In step 620, determine whether to receive second request responding to roaming number from the first pond MSC325.If then handle roaming number in default MSC 310 in step 625.In step 630, roaming number is sent to HLR 315, finish calling, and method 600 finishes to travelling carriage.But if do not receive roaming number from the first pond MSC325 in step 620, then method 600 enters step 635, will be sent to the second pond MSC330 from default MSC 310 for the 3rd request of roaming number.

When the second pond MSC330 receives the 3rd when request for roaming number, because called MS was registered to the first pond MSC325 rather than the second pond MSC330 last time, therefore the second pond MSC330 can not identify called MS.Therefore, response is for the 3rd request of roaming number, and the second pond MSC330 will be sent to HLR 315 to the request of additional customer's data.HLR 315 will be sent to the second pond MSC330 such as additional customer's data of the IMSI record relevant with called MS.Have only at this moment, the second pond MSC330 could discern the roaming number relevant with called MS and send it to default MSC 310.

In step 640, handle the roaming number that receives from the second pond MSC330 in default MSC 310.In step 645, default MSC 310 sends roaming number to HLR 315 subsequently.At this moment, can finish calling, and method 600 finishes to travelling carriage

Therefore, advantage of the present invention comprises the failed calls that reduces in the mobile communications network.In the given pool area that covers called mobile station, have under the situation of a plurality of mobile switching centres (MSC) operation, will at first handle by default MSC for the all-calls of the travelling carriage that in pool area, moves.Default MSC is not limited to the request to the roaming number of called mobile station is sent to that MSC that travelling carriage was registered to last time.On the contrary, default MSC 310 can repeatedly be got in touch each MSC among a plurality of MSC that move in pool area, can provide roaming number for specific called mobile station up to one of them MSC.By reducing frequency of call failure, embodiments of the invention make it possible to improve the network user's service quality (QoS) and can more effectively use Internet resources.

Above detailed description only provides example embodiment, and does not mean that qualification scope of the present invention, application or configuration.On the contrary, the detailed description of example embodiment makes those skilled in the art can implement example embodiment of the present invention.Should be appreciated that and under the situation of the spirit and scope of the present invention that do not deviate from claims qualification of enclosing, to carry out various changes the function and the arrangement of assembly and step.Should be appreciated that embodiments of the present invention described herein can comprise one or more conventional processors and the one or more processors of control and specific non-processor circuit together implement aforesaid in mobile communications network routing call some, the unique stored program instructions of major part or repertoire.Non-processor circuit can include but not limited to radio receiver, radio transmitter, signal driver, clock circuit, power circuit and user input device.Like this, these functions can be interpreted as the step of the method for routing call in mobile communications network.Alternatively, some or all of functions can be realized or be realized in one or more application-specific integrated circuit (ASIC)s (ASIC) (wherein some combination of each function or specific function is implemented as self-defined logic) by the state machine that does not have the program stored instruction.Certainly, can use the combination of this dual mode.Therefore, the method and apparatus that is used for these functions has been described here.In addition, although the multiple design alternative that may need certain effort and excite by for example up duration, current techniques and economic consideration, still expect those skilled in the art can disclosed here notion and the guide of principle can easily produce such software instruction and program and IC with minimum test down.

In aforementioned specification, specific implementations of the present invention is disclosed.Yet, should be appreciated that those skilled in the art can carry out various modifications and distortion under the situation of the scope of the present invention that does not deviate from claims qualification of enclosing.Therefore, specification and accompanying drawing are exemplary rather than determinate, and all this modifications all comprise within the scope of the invention.Advantage, benefit, the scheme of dealing with problems and may cause any advantage, benefit or solution takes place or becomes more significantly that element should not be understood that crucial in any or all claim, require or necessary feature or element.The present invention is only limited by the claim of enclosing (being included in any modification that the present invention makes during unsettled) and all equivalents of these claims.

Claims

1. the method for a routing call in mobile communications network, described method comprises:

In the message of attaching position register HLR reception from the first pond moving exchanging center MSC, mobile station MS is registered to described MSC in pool area, described message comprise pool area default MSC address information but do not comprise the address information of the first pond MSC, described message also comprises the network resource identifier NRI of the first pond MSC;

Only store address information at HLR about the default MSC of the pool area of serving MS;

Handle first request for the roaming number that is associated with MS that receives from HLR in default MSC, wherein first request for roaming number comprises the NRI that discerns the first pond MSC;

Use NRI to discern the first pond MSC in default MSC;

To be sent to the first pond MSC from default MSC for second request of the roaming number that is associated with MS;

In response to second request, handle the roaming number that is associated with MS that receives from the first pond MSC in default MSC for roaming number;

The roaming number that will be associated with MS is sent to HLR from default MSC; And

After in response to the roaming number that second request does not receive from the first pond MSC with MS is associated, to three request of second pond MSC transmission for the roaming number that is associated with MS, wherein the first pond MSC and the second pond MSC are in single pool area from default MSC.

2. method according to claim 1, wherein in response to the 3rd request, the second pond MSC is to the request of HLR transmission for the additional customer data relevant with MS.

3. method according to claim 2, wherein in response to the request for the additional customer data relevant with MS, HLR passes the international mobile subscriber identity IMSI record of MS back second pond MSC.

4. method according to claim 3 also comprises:

Handle from the roaming number of the MS of second pond MSC reception in default MSC;

The roaming number of MS is sent to HLR from default MSC.

5. method according to claim 2, wherein the request for additional customer's data comprises MAP MAP_RESTORE_DATA message.

6. method according to claim 1, wherein default MSC comprises 1+1 or N+1 fault-tolerant configuration.

7. method according to claim 1 is that response comprises the call setup message that is sent to the MAP MAP_SEND_ROUTING_INFORMATION message of HLR from GMSC (gateway mobile switching center) (GMSC) for first request of the roaming number that receives from HLR wherein.

8. method according to claim 1, wherein first request for the roaming number that is associated with MS comprises MAP MAP_PROVIDE_ROAMING_NUMBER message.

9. method according to claim 1, wherein because the first pond MSC is out of service, second request that do not respond receives the roaming number that is associated with MS from the first pond MSC.

10. method according to claim 1 is wherein deferred to third generation partner program (3GPP) standard to first request of the roaming number that is associated with MS.