CN1150784C - Method and system for realizing virtual roaming and intercommunication in cellular system - Google Patents

Abstract

The present invention relates to a method and a system for implementing the virtual roaming and the intercommunication of cellular systems. In the present invention, voice channel intercepting control among different networks and the location updating control of roaming localization can be implemented among public land movable networks (PLMN) belonging to different regions, operators and systems. The system comprises a plurality of gateway mobile switching centers (GMSC) respectively belonging to the interior of each PLMN as equipment accessing the system of the present invention, and a general home location register (HLR) for centralizing the client data management, wherein the general HLR can be virtually used as an HLR of each network itself. All clients can implement roaming, the decrease of long-distance telephone charge and the free selection of long-distance transmission modes by being distributed with different numbers of a network numbering scheme and being combined with the long-distance voice channel control function.

Description

Method and system for realizing virtual roaming and intercommunication in cellular system

technical field

The present invention relates to the technical field of cellular mobile communication systems, and more precisely relates to the free roaming intercommunication among mobile networks of different regions, different operators and different systems in the cellular communication system. Internet technology.

Background technique

In the current cellular mobile communication system, each mobile user has a home location, that is, a home network. When a user roams to an external network other than his home network and makes incoming and outgoing calls, even if the local inbound and outbound calls are made in the roaming location, the roaming network and the home network's voice channel resources will be occupied at the same time. , thus can produce the long-distance call charges of the calling party and the called party, which makes the user's mobile phone use burden (payment) aggravated. In addition, when the call takes place in different regions, especially between regions at the border of countries, although they are only a few kilometers apart from the geographical point of view, due to the operating charges and tariff policies of different regions (countries), often The call charges between these users are greatly increased, because it contains high or even unaffordable international call charges, which greatly hinders the information exchange and intercommunication among the people in the border areas of the country.

Judging from the current situation, due to the different tariff policies and operating tariffs in different regions (countries), and the differences between the specific standard protocols implemented by various cellular mobile systems, although the scientific and technological circles have discussed related issues and proposed Some suggestions, but as far as the applicant knows, there is no relatively complete solution that can solve the above problems.

In the patent application with publication number CN1225787A titled "System and method for realizing multi-homing location register for a single mobile station within a cellular communication system", a single The technical solution of mobile stations and multi-homing location registers. In this solution, the networking and system configuration are consistent with the current cellular mobile network. In the home location register (HLR) of the external network, a software command for instructing the system to select the home location register (HLR) of the roaming network is added, and a roaming location is assigned to the user roaming to the home network through the software command number, to achieve the function of reducing the part of the long-distance call charges. Although this solution can reduce long-distance call charges caused by roaming, it is impossible to reduce long-distance call charges or even international call charges due to the inability to freely select the long-distance transmission link when each network is interconnected. At the same time, in this solution, since a software command indicating the system to select the home location register (HLR) of the roaming network is added, the problem that each associated home location register (HLR) needs to be updated and upgraded is caused. And between each Home Location Register (HLR), due to the exchange of user data, signaling messages need to be exchanged between each Home Location Register (HLR), and this signaling message cannot be communicated with existing cellular mobile devices. The compatibility of the networks makes it difficult to connect between two home location registers (HLRs), thus limiting the use of this technical solution.

To sum up, in view of the current status of the implementation of various tariffs between cellular mobile networks, when users roam freely and intercommunicate between various mobile networks across networks, regions, and systems, it is necessary to save long-distance calls and To realize the free choice of long-distance transmission routes is indeed a topic with real practical value and great market potential.

Contents of the invention

The purpose of the present invention is to design a method and system for realizing virtual roaming and intercommunication of a cellular system, which can realize free roaming and intercommunication functions of users among various wireless networks across networks, regions, and systems, and can save long-distance call charges , and users can arbitrarily choose a suitable wireless network according to the quality of the network and the cost of using the network, and communicate freely.

The technical solution for realizing the object of the present invention includes: a system for realizing virtual roaming and intercommunication of a cellular system, characterized in that:

Set up a centrally managed total home location register between all public land mobile networks that require virtual roaming and interworking, and set up a gateway mobile for system equipment access in each public land mobile network that requires virtual roaming and interworking exchange center;

The general home location register is connected with each gateway mobile switching center, the general home location register is connected with each public land mobile network that needs virtual roaming and intercommunication through the signaling transfer point, and each gateway mobile switching center is connected with the public land mobile network where it is located and through The gateway device is connected with the long-distance transmission network.

Each gateway mobile switching center is connected to the visiting mobile switching center of the public land mobile network where it is located, or directly connected to the gateway mobile switching center inside the public land mobile network where it is located.

The long-distance transmission network includes the Internet and traditional long-distance transmission networks.

The general home location register is set as a virtual home location register corresponding to all public land mobile networks that require virtual roaming and intercommunication, and the standard of each virtual home location register is consistent with the standard of the corresponding public land mobile network.

The technical solution for achieving the object of the present invention also includes: a method for realizing virtual roaming and intercommunication of a cellular system, which is characterized in that it includes:

Set up a general home location register and a gateway mobile switching center respectively belonging to each public land mobile network; the general home location register centrally controls all the gateway mobile switching centers belonging to each public land mobile network; The gateway mobile switching center in the public land mobile network is set as the system access device, which is connected with the visiting mobile switching center of the corresponding public land mobile network, or directly connected with the gateway mobile switching center of the corresponding public land mobile network; When the user who has opened an account in the register roams freely between different public land mobile networks, the control of voice path interception between different networks is realized, including: a. recording the real roaming number of the called user; b. according to the roaming number of the called user Location allocation assigns a temporary virtual user roaming number, and establishes a matching and conversion relationship between the virtual user roaming number and the real user roaming number; c. Give the called user a real roaming number; and realize roaming localization location update after the user roams Control, including: the general home location register sends the user number consistent with the current roaming network number to the visiting location register in the user's current roaming network according to the visiting mobile switching center number of the user's current roaming network location, so that the roaming user can enjoy the roaming network The original attributable mobile subscribers have the same call charges.

The different public land mobile networks include wireless networks in the same or different regions, the same or different operators, and the same or different systems.

The wireless network system includes global system for mobile communication and code division multiple access system.

The setting of a general home location register is a logical entity corresponding to setting a virtual home location register for each public land mobile network in the same physical entity, and the system of each virtual home location register adopts the corresponding public land mobile network. standard and use the corresponding numbering plan of the public land mobile network.

The system of each virtual home location register in the said general home location register may be the same or may not be the same.

The said subscribers who open an account in the general home location register are the numbers allocated to the subscribers with the numbering schemes of the various public land mobile networks; or the numbers allocated to one or more of the numbering schemes of the public land mobile networks.

The implementation of the interception control for selecting the voice channel between different networks is realized under the condition that the numbering plan of the called number used by the calling party that initiates the call is consistent with the numbering plan of the calling party's home network.

In said step a, when the calling party calls the called party roaming in another network according to the numbering plan of the home network, the virtual home location register corresponding to the calling party and the called party network in the total home location register, through Internal information exchange, according to the called number, query the called party's current roaming network for the calling party's visiting mobile switching center, obtain and save the called party's real roaming number with the numbering plan of the called party's current roaming network; the steps b, according to the virtual home network numbering scheme of the calling party, allocate a false virtual user roaming number corresponding to the calling party gateway mobile switching center and correspondingly store the relationship between the real roaming number and the virtual user roaming number; said step c, the calling party The visiting mobile switching center uses the false virtual user roaming number to establish a call path between the calling party's gateway mobile switching center, and the calling party's gateway mobile switching center obtains the real roaming number of the called party through the total home location register, and Control the follow-up call and access the called party.

In said step a, when the calling party calls the called party roaming in another network according to the numbering plan of the home network, the virtual home location register corresponding to the calling party and the called party network in the total home location register, Through internal information interaction, according to the called number, the visiting mobile switching center of the calling party inquires the current roaming network of the called party, obtains and saves the real roaming number of the called party with the numbering plan of the current roaming network of the called party; Step b, allocate a false virtual user roaming number corresponding to the called party's gateway mobile switching center according to the numbering scheme of the called party's virtual home network and correspondingly store the relationship between the real roaming number and the virtual user's roaming number; said step c, the calling party The calling party's visiting mobile switching center uses the fake virtual subscriber roaming number to establish a call path between the two gateway mobile switching centers of the calling party's network and the called party's network, and the called party's gateway mobile switching center obtains it through the general home location register. The real roaming number of the called party, and control the follow-up call path to access the called party.

In the step a, when the calling party calls the called party who roams to another home network of the calling party's home network according to the numbering plan of the home network, the network corresponding to the calling party and the called party in the total home location register virtual home location register, through internal information interaction, according to the numbering plan of the called party, assign a false roaming number corresponding to the called party's gateway mobile switching center and return to the visiting mobile switching center of the calling party; said step b, the calling party The visiting mobile switching center of the party sets up the speech path between the two gateway mobile switching centers of the calling party network and the called party network with the false virtual subscriber roaming number; The HLR initiates a query request to obtain the routing information of the called party, the general HLR obtains the real roaming number of the called user from the VLR of the called party and returns it to the gateway mobile switching center of the called party, and the called party The gateway mobile switching center of the party controls the follow-up voice channel and accesses the called party.

The technical solution for realizing the purpose of the present invention can also be: a method for realizing virtual roaming and intercommunication of a cellular system, which is characterized in that it includes the following steps:

A. Set up a total home location register and set up a gateway mobile switching center belonging to each network in each public land mobile network, and each gateway mobile switching center cooperates with the total home location register to realize virtual roaming and intercommunication;

B. In the same general home location register physical entity, a logical entity of a virtual home location register is correspondingly set up for each public land mobile network, and the system of each virtual home location register adopts the standard of the corresponding public land mobile network, and uses the the numbering plan of the corresponding public land mobile network;

C. When the calling party calls the called party roaming in another network according to the called number of the numbering plan of the home network, the virtual home location register of the calling network and the virtual home location register of the calling party network are virtualized in the calling party network It is virtual as the virtual home location register of the called party's network. Through internal information interaction, the virtual home location register in the calling party or the called party's network obtains the real roaming number of the called party's current roaming network and assigns a caller identification The false roaming number at the gateway mobile switching center in the network or the called party's network is used for the calling party's network to find the way, and store the corresponding relationship between the true and false roaming numbers;

D. The gateway mobile switching center of the calling party or the gateway mobile switching center of the called party's current roaming network obtained by the false roaming number finds the true roaming number identifying the real location information of the called party from the total home location register , to intercept the calling party's call path to the called party's current roaming network through the designated transmission network.

The realization system of virtual roaming and intercommunication of the cellular system of the present invention sets a total home location register (HLR) between all public land mobile networks (PLMN) that require virtual roaming and intercommunication, and sets up a total home location register (HLR) between each of the public land mobile networks (PLMNs) that require virtual roaming and intercommunication. A gateway mobile switching center (GMSC) is newly added to the public land mobile network (PLMN), and all gateway mobile switching centers (GMSC) are centrally controlled by the general home location register (HLR), thus forming a virtual roaming and intercommunication system of the cellular system. The system of the present invention realizes the virtual roaming method of different networks by using the virtual home location registers corresponding to each network in the same physical entity (total home location register) to manage one machine with multiple numbering schemes, and according to the user's actual roaming network position The number of the corresponding numbering plan is distributed, and the automatic interception of the call is carried out through the automatic matching between the called number and its roaming network location.

The general home location register (HLR) in the virtual roaming and interworking system is similar to the home location register (HLR) in the current PLMN network, but it is an enhanced home location register (HLR), not only compatible with the original HLR Function, and at the same time, it can realize the virtual home location register (HLR) function between different PLMN networks in different regions, different operators, and different systems. A total home location register (HLR) for centralized management is set between all PLMN networks that need virtual roaming and interconnection and intercommunication, which is equivalent to adding virtual A home location register (HLR) of the roaming and interworking system, which conveniently realizes the free roaming and intercommunication function of mobile users in all virtual roaming and interconnected and interoperable PLMN networks, and reduces cross-network, cross-region, and cross-system Long distance charges while roaming.

The gateway mobile switching center (GMSC) in the system of the present invention is to set one in each PLMN network that needs virtual roaming and interconnection and intercommunication, and the gateway mobile switching center (GMSC) that realizes roaming and intercommunication functions is functionally It is very different from the function of the Gateway Mobile Switching Center (GMSC) which realizes the interconnection with the public service telephone network (PSTN) in the current PLMN network. The gateway mobile switching center GMSC of the present invention can realize the transfer function of international long-distance call charges to the mobile subscribers who have opened an account in the total home location register (HLR) of the present invention, thereby realizing the selection of long-distance transmission routes and achieving the purpose of saving call charges .

The solution of the present invention can be implemented after superimposing a part of equipment on the existing cellular mobile network, without changing any software and hardware in the original equipment, and can directly use the virtual roaming function of the system and method of the present invention to realize cross-network and cross-region , Cross-system roaming and intercommunication, saving long-distance call charges, and more importantly, it can realize the selection of long-distance transmission routes.

Description of drawings

Fig. 1 is a schematic diagram of the first call flow in the existing GSM network.

Fig. 2 is a schematic diagram of the second call flow in the existing GSM network.

Fig. 3 is a schematic diagram of the third call flow in the existing GSM network.

Fig. 4 is a schematic diagram of the fourth call flow in the existing GSM network.

Fig. 5 is a structural schematic diagram of the implementation scheme of the cellular mobile virtual roaming system of the present invention

Fig. 6 is a schematic flow chart of the first call interception method of the first call of the cellular mobile virtual roaming intercommunication according to the solution of the present invention.

Fig. 7 is a schematic flow chart of the second voice channel interception method of the first call of the cellular mobile virtual roaming intercommunication according to the solution of the present invention.

Fig. 8 is a schematic flow chart of the third voice path interception method of the first call of the cellular mobile virtual roaming intercommunication according to the solution of the present invention.

Fig. 9 is a schematic diagram of the second call flow of cellular mobile virtual roaming intercommunication according to the solution of the present invention.

Fig. 10 is a schematic diagram of the third call flow of cellular mobile virtual roaming intercommunication according to the solution of the present invention.

Detailed ways

In order to better understand the technical solution of the present invention, the call flow of the existing GSM network will be described below in conjunction with accompanying drawings 1 to 4 . It is aimed at the mobile station 2 (MS2) belonging to the home location register (HLR2) roaming in the public land mobile network 1 (PLMN1) and the public land mobile network 2 (PLMN2) as the called situation (Fig. 6 to Fig. 10 are also for this situation). The other situations where the mobile station 1 (MS1) roams as the called party and the mobile station 2 (MS2) roams as the calling party are not repeated because the principles and procedures are the same. In the figure, mobile services switching center/visitor location register 1 (MSC/HLR1) and mobile services switching center/visitor location register 2 (MSC/HLR2) belong to public land mobile network 1 (PLMN1) and public land mobile network 2 (PLMN2) respectively , is the device in the existing mobile network, that is, the Visited Mobile Switching Center (VMSC).

Referring to FIG. 1, a mobile station 2 (MS2) roams to a public land mobile network 1 (PLMN1), and a mobile station 1 (MS1) in the public land mobile network 2 (PLMN2) initiates a call to the mobile station 2 (MS2). Among the figure, MSC/VLR1 and MSC/VLR2 are mobile service switching centers/visitor location registers respectively belonging to public land mobile networks PLMN1 and PLMN2, while HLR1 and HLR2 are home location registers respectively belonging to public land mobile networks PLMN1 and PLMN2 ( The meanings of the symbols in Fig. 1 also apply to Figs. 2 to 4).

Step (1), MS1 under MSC/VLR1 initiates a call to MS2;

Step (2), by MSC/VLR1 initiates the request of getting route to the Home Location Register 2 (HLR2) of called MS2;

Step (3), HLR2 queries database, finds that mobile station MS2 is roaming in PLMN1, and initiates the request of roaming number to MSC/VLR2 in PLMN1;

Step (4), MSC/VLR2 returns the roaming number of MS2 to HLR2;

Step (5), HLR2 returns routing response to MSC/VLR1, and the roaming number of MS2 is returned to MSC/VLR1;

Step (6), MSC/VLR1 analyzes the roaming number of MS2 and then establishes a voice path between MS1 and MS2 through an international gateway office or an inter-network gateway office, realizing the connection between two PLMN networks of the voice path;

In step (7), MS2 accesses and talks until either party hangs up.

Above-mentioned steps show at least, in the calling process of existing GSM network, need adopt a plurality of Home Location Registers (HLR1, HLR2), and HLR1, HLR2 are two physical entities, and must be the HLR in the mobile network of the same standard (such as All GSM standard or all CDMA standard); HLR2 in the call process directly obtains the roaming number of MS2 from MSC/VLR2 and then returns it to MSC/VLR1; what HLR2 returns to MSC/VLR1 is to identify the real roaming location of MS2 The real roaming number for MSC/VLR1 to use this roaming number to find the way to MS2 in MSC/VLR2 through the international gateway office or the inter-network gateway office, so as to establish a voice path between the two PLMN networks. Long-distance and even international calls are unavoidable.

Referring to FIG. 2, a mobile station 2 (MS2) roams to a public land mobile network 1 (PLMN1), and the mobile station 1 (MS1) in the public land mobile network 1 (PLMN1) initiates a call to the mobile station 2 (MS2).

Step (1), MS1 roaming under MSC/VLR1 initiates a call to MS2;

Step (2), by MSC/VLR1 initiates the request of getting route to the Home Location Register 2 (HLR2) of called MS2;

Step (3), HLR2 queries database, finds that mobile station MS2 is roaming in PLMN1, and initiates the request of roaming number to MSC/VLR2 in PLMN1;

Step (4), MSC/VLR2 returns the roaming number of MS2 to HLR2;

Step (5), HLR2 returns routing response to MSC/VLR1, and the roaming number of MS2 is returned to MSC/VLR1;

Step (6), MSC/VLR1 analyzes the roaming number of MS2, sets up the speech path between MS1 and MS2 in PLMN1, realizes the connection of speech path between the same PLMN network;

In step (7), MS2 accesses and talks until either party hangs up.

The above steps at least show that in the call flow of the existing GSM network, when MS2 roams from the home PLMN2 to PLMN1, it must be transmitted to HLR2 in PLMN2 through international signaling for location registration; after MS2 roams from PLMN2 to PLMN1, if The network standards of PLMN2 and PLMN1 are different, even if MS2 uses the same standard equipment (mobile phone) as PLMN1, but because HLR2 and MSC/VLR2 have different standards, it is impossible to register the location through MSC/VLR2 to HLR2; When MSC/VLR1 needs to transmit to HLR2 through international signaling to obtain routing information of MS2, it can find a way to MS2 roaming to PLMN1 and MSC/VLR2; if MSC/VLR1 and HLR2 belong to different network equipment, Signaling procedures will not be compatible.

Referring to FIG. 3, a mobile station 2 (MS2) is roaming in a public land mobile network 2 (PLMN2), and a mobile station 3 (MS3) in a public land mobile network 1 (PLMN1) initiates a call to the mobile station 2 (MS2).

Step (1), MS3 roaming under MSC/VLR2 initiates a call to MS2;

Step (2), by MSC/VLR2 initiates the request of getting route to the Home Location Register 2 (HLR2) of called MS2;

Step (3), HLR2 queries database, finds that mobile station MS2 is roaming in PLMN2, and initiates the request of roaming number to MSC/VLR1 in PLMN2;

Step (4), MSC/VLR1 returns the roaming number of MS2 to HLR2;

Step (5), HLR2 returns routing response to MSC/VLR2, and the roaming number of MS2 returns MSC/VLR2;

Step (6), MSC/VLR2 analyzes the roaming number of MS2, then establishes the voice path between MS3 and MS2 through the international gateway office or the inter-network gateway office, and realizes the connection between the two PLMN networks of the voice path;

In step (7), MS2 accesses and talks until either party hangs up.

The problems in the above steps are basically the same as those shown in FIG. 1 , and will not be repeated here.

Referring to FIG. 4, a local mobile station in a public land mobile network 2 (PLMN2) initiates a call to a mobile station 2 (MS2).

Step (1), MS1 roaming under MSC/VLR1 in the PLMN2 network initiates a call to MS2;

Step (2), by MSC/VLR1 initiates the request of getting route to the Home Location Register 2 (HLR2) of called MS2;

Step (3), HLR2 queries database, finds that mobile station MS2 also roams in PLMN2, and initiates the request of roaming number to MSC/VLR2 in PLMN2;

Step (4), MSC/VLR2 returns the roaming number of MS2 to HLR2;

Step (5), HLR2 returns routing response to MSC/VLR1, and the roaming number of MS2 returns MSC/VLR1;

Step (6), MSC/VLR1 analyzes the roaming number of MS2, sets up the speech path between MS1 and MS2 in PLMN2 network, realizes the connection of speech path in the same PLMN network;

In step (7), MS2 accesses and talks until either party hangs up.

Since the call process takes place in the same network, it should not belong to the scope of discussion of the present invention.

Referring to Fig. 5, it is a schematic diagram of the simplest structural composition of the cellular mobile virtual roaming system of the present invention, in the figure, there are only two interconnected public land mobile networks (PLMNs), which are respectively GSM net1 and GSMnet2 (also can be other systems) network). The general home location register/authentication center (HLR virtual/Auc) that hints out with dotted line among the figure and belong to two gateway mobile switching centers (GMSC) of two public land mobile networks (PLMN) respectively, are to realize the cellular network of the present invention. As a new entity of the mobile virtual roaming system, the long-distance transmission network in the middle adopts the Internet (IP net), and other transmission methods, such as other traditional long-distance transmission networks, can also be used.

The total home location register/authentication center (HLR virtual/Auc) (including the database Data) is connected with each gateway mobile switching center (GMSC), and the total home location register/authentication center (HLR virtual/Auc) passes the signaling conversion point ( S.T.P) is connected to each public land mobile network (PLMN) GSM net1 and GSM net2 that require virtual roaming and intercommunication, and each gateway mobile switching center (GMSC) is connected to the public land mobile network (PLMN) GSM net1 and GSM net2 to which it belongs , and are respectively connected to the long-distance transmission network (IP net or any existing long-distance transmission network) through the gateway device (IP_GW). In the figure, the VMSCs are the visiting mobile switching centers of the public land mobile network (PLMN) GSM net1 and GSM net2 respectively, and are respectively connected with the public land mobile network (PLMN) GSM net1 and GSM net2 and their signaling transfer points (S.T.P) .

The system shown in the figure shows that realizing the cellular mobile virtual roaming system of the present invention needs to set a total home location register/authentication center of a virtual multi-operation, multi-system, multi-regional PLMN network on the basis of the original cellular mobile communication system (HLR/AUC) and multiple Gateway Mobile Switching Centers (GMSC) respectively belonging to each PLMN network. All users (visited persons) who have opened an account in the cellular mobile virtual roaming system can freely roam between different PLMN networks and reduce long-distance call expenses.

The gateway mobile switching center (GMSC) in each public land mobile network in the system of the present invention is no longer a gateway mobile switching center in the traditional sense, because it is not used as a gateway for intercommunication between the fixed network and the mobile network, functionally It is more similar to a tandem office, they cooperate with the general home location register/authentication center (HLR/AUC) to realize the call interception function of the selected call number, so that each gateway mobile switching center (GMSC) can finally obtain from the HLR/AUC The real roaming number of the called user is used for voice channel control.

The total home location register/authentication center (HLR/AUC) in the system of the present invention can also realize many HLR number functions, to satisfy multiple operators PLMN The function of virtual home location register/authentication center; in addition, in order to realize the intercommunication function of the mobile station user at the local level, the general home location register/authentication center (HLR/AUC) can also automatically identify the location information of the mobile station user and Insert the mobile station ISDN (MSISDN) number of corresponding this mobile station user; Moreover, in order to ensure that the voice path interception function can be realized, the total home location register/authentication center (HLR/AUC) also needs to be able to roam according to the mobile station user. The location is automatically analyzed and judged, and the temporary virtual user roaming number is assigned to the mobile station user, and the matching and conversion between the real user roaming number and the temporary virtual user roaming number are provided to realize voice channel interception. In order to enable mobile stations to roam in mobile networks of different standards, the HLR/AUC needs to be compatible with mobile station data of different standards, and also needs to be compatible with signaling of different standards.

Realize the interconnection and intercommunication function between networks of different operators, different systems, and different regions, mainly reflected in two aspects of location update and calling. The process of implementing location update and calling in the cellular mobile virtual roaming system of the present invention will be further described below in conjunction with accompanying drawings 6 to 10 .

For the sake of clarity, assume that the two PLMN network operators in the cellular mobile virtual roaming system in Figure 6 to Figure 10 are respectively Operator1 (tentative English name) and Operator2 (tentative English name); Operator1 has a network PLMN1 as GSM standard or CDMA standard, Operator2 has a network PLMN2 that is CDMA standard or GSM standard, so the two operating networks are cross-operator, cross-system and cross-region, that is, the mobile station ISDN (MSISDN) of the two operators ) numbering schemes are different, assuming that the mobile station ISDN (MSISDN) numbering scheme of operator Operator1 is MSN1, number N1, and the MSISDN numbering scheme of operator Operator2 is MSN2, number N2.

Assuming that the mobile station ISDN number (MSISDN) in the total home location register in the virtual roaming system adopts two kinds of numbering schemes: MSN1 and MSN2; the total home location register (HLR) has two HLR identity numbers (HLR ID) in the virtual roaming system, They are the HLR numbers of the two networks PLMN1 and PLMN2 respectively: HLR ID1 and HLR ID2; the user's International Mobile Station Identity (IMSI) in the system adopts the IMSI of the operator Operator1.

The concept of the location update of the present invention is: the difference (MSC/VLR1, MSC/VLR2) of the Mobile Services Switching Center/Visitor Location Register (MSC/VLR) number after the (roaming) mobile services switching center/visitor location register (MSC/VLR) number is updated by the total home location register according to the called mobile station location , respectively send the MSC/VLR1 or MSC/VLR2 roaming to PLMN1 or PLMN2 the mobile station number consistent with the numbering plan of the network where the called party roams: MSN1 or MSN2, that is, according to the mobile service switching center/visited numbering plan where the called party roams Different location register (MSC/VLR) numbers send different HLR ID numbers, including HLR numbers in the two networks of PLMN1 and PLMN2: HLR ID1 and HLR ID2. In this way, the function of two or more virtual HLR entities can be realized, and the unified management of different roaming networks can be achieved, and the number of mobile stations can be allocated according to the location of roaming, so as to realize the function of saving incoming and outgoing calls.

Suppose again that mobile station MSb is a mobile station (account opened) in the virtual roaming system of the present invention, there is a user MSa who belongs to Operator2, PLMN2 (adopts MSN2 numbering scheme) and roams in PLMN2 to call MSb, now there are two kinds Condition:

(1) When MSa calls MSb's number N1 in the MSN1 numbering plan, the visiting mobile service switching center (MSC/VLR2) where the calling Msa in PLMN2 is located will consider that MSb and MSa are not in the same In PLMN2, it is directly transferred to the international gateway office, so if the calling MSa has no international authority, the call is not allowed;

(2), when MSa calls the number N2 of the MSN2 numbering plan of MSb, because the visiting mobile service switching center (MSC/VLR2) where the calling Msa in PLMN2 is located at this time is determined to be the subscriber number in PLMN2 of Operator2 after judgment , then the call can be made through the virtual roaming system of the present invention.

Equally, if the calling user in the belonging PLMN1 calls the user who opened an account in the total home location register (HLR) of the virtual roaming system of the present invention, as long as what dials is the MSN1 numbering plan (N1), the call can be set up, otherwise the calling party must have International permissions only allow calls to users of the MSN2 numbering plan (N2).

The location update, calling principle and calling process of the technical solution of the present invention will be described below with reference to FIG. 6 to FIG. 10 .

Referring to Fig. 6, similar to the situation in Fig. 1, the mobile station 2 (MS2) roams to the public land mobile network 1 (PLMN1), and the mobile station 1 (MS1) in the public land mobile network 2 (PLMN2) initiates a call to the mobile station 2 (MS2) calls, the number N2 of MS1's MSN2 numbering plan is called. Among the figure, HLR1 and HLR2 are the same entity in the system of the present invention—two logical points in the total location attribution register; GMSC and GMSC2 are the gateway mobile switching centers respectively belonging to PLMN2 and PLMN1 in the system of the present invention; MSC/VLR1, MSC/VLR2 are two mobile service switching centers/visitor location registers respectively belonging to PLMN1 and PLMN2 and corresponding to MS1 and MS2 respectively.

Step (1), mobile station MS1 roaming under PLMN2, MSC/VLR1 initiates a call to mobile station MS2, and the calling number is N2 (must be N2 according to the calling principle, if calling N1, then MS1 needs to have international authority);

Step (2), MSC/VLR1 initiates a routing request to HLR2 according to the called number N2;

Step (3), HLR2 inquiry database finds that MS2 is roaming in PLMN1, informs HLR1 to get routing information;

Step (4), after HLR1 receives the message notification of getting routing information, initiates getting roaming number request to MSC/VLR2 with N1;

Step (5), MSC/VLR2 returns the real mobile station roaming number MSRN1 of MS2 to HLR1;

Step (6), HLR1 preserves the real mobile station roaming number MSRN1 of MS2, and notifies HLR2 that the real roaming number MSRN1 of MS2 has been obtained, and distributes a false roaming number MSRN2 of identifying the GMSC2 position to return to HLR2, and stores MS2's number in HLR1 The corresponding relationship between the real roaming number MSRN1 and the fake roaming number MSRN2;

Step (7), HLR2 returns a routing response to MSC/VLR1 with the false roaming number MSRN2 as the roaming number;

Step (8), (9), MSC/VLR1 sets up the speech path to GMSC2 by GMSC with false roaming number MSRN2 as the called number;

Step (10), GMSC2 makes called analysis to false roaming number MSRN2, gets routing information to HLR1;

Step (11), HLR1 returns a routing response to GMSC2, and adopts the real roaming number MSRN1 by inquiring about the corresponding relationship between the real roaming number MSRN1 and the false roaming number MSRN2 of MS2 stored;

Step (12), by GMSC2 by MSC/VLR2 control setting up of follow-up speech path;

Step (13), MS2 accesses and talks until one party hangs up.

In the situation shown in Figure 6, the difference between the call process and the call process in Figure 1 is: HLR1 and HLR2 are the same physical entity, which can be virtualized as home location registers (HLR) belonging to two different networks, logically equivalent For the two entities, the network standards of the two logical entities can be the same or different, especially different, such as one is GSM and the other is CDMA; HLR2 does not directly obtain the roaming number of MS2 from the MSC/VLR2 of PLMN1, but It is realized to obtain the roaming number of MS2 in MSC/VLR2 by virtual HLR1 in PLMN1 network with MSC/VLR2, thereby, the total home location register (HLR) of the system of the present invention can actually be the logic entity that supports two kinds of different systems HLR1 and HLR2, in which HLR1 supports the network standard of PLMN1, and HLR2 supports the network standard of PLMN2, and the compatible conversion of different standard signaling is realized through internal information interaction between HLR1 and HLR2; the information returned by HLR2 to MSC/VLR1 is not to identify the real location of MS2 The real roaming number is a fake roaming number that identifies the location of GMSC2, so that MSC/VLR1 can find a way to the location of GMSC according to the fake roaming number, and then GMSC and GMSC2 get the real location information of user MS2 from HLR1 by taking routing signaling messages The real roaming number of MS2, then GMSC2 intercepts the calling channel of MS1 to PLMN1 through the designated transmission network through the system of the present invention according to the real roaming number of MS2.

It should be noted that, since in FIG. 6, PLMN1 and PLMN2 are of different standards, a GMSC2 is also set in PLMN1, and the false roaming number returned by HLR2 is the position information identifying the GMSC2 of the PLMN1 network rather than identifying the position of the GMSC in the PLMN2. After the voice channel intercepts the GMSC2 of PLMN1, since the GMSC2 and MSC/VLR2 are of the same standard, GMSC2 can directly go to HLR1 to obtain the real roaming number of MS2, and then find the way to MSC/VLR2 according to the real roaming number of MS2 .

Referring to Figure 7, the situation is similar to that in Figure 6, but another interception method is adopted.

Step (1), the user MS1 roaming under MSCVLR1 initiates a call to MS2, and the called number is N2;

Step (2), MSCVLR1 initiates a routing request to HLR2 according to the called number N2;

Step (3), HLR2 inquiry database finds that MS2 is roaming in PLMN1, informs HLR1 to get routing information;

Step (4), after HLR1 receives the notification of getting the routing information message, it finds that it is an internal message initiated by HLR2, and HLR1 does not get the routing information in MSC/VLR2, but distributes a false roaming number MSRN2 that identifies the GMSC2 position and returns to HLR2 ;

Step (5), HLR2 responds to MSC/VLR1 loop routing with MSRN2 as the roaming number;

Step (6,7), MSC/VLR1 sets up the speech path to GMSC2 by GMSC with MSRN2 as called number;

Step (8), GMSC2 analyzes the called party to MSRN2, and gets routing information to HLR1;

Step (9), HLR1 initiates the roaming number request to MSC/VLR2 with N1

Step (10), MSC/VLR2 returns the roaming number MSRN1 of MS2 to HLR1;

Step (11), HLR1 responds to GMSC2 loop routing, and the roaming number is MSRN1

Step (12), GMSC2 controls the establishment of follow-up speech path;

Step (13), MS2 accesses and talks.

Referring to Fig. 8, the situation is similar to that in Fig. 6, but another interception method is adopted.

Step (1), MS1 roaming under MSC/VLR1 initiates a call to MS2, and the called number is N2;

Step (2), MSC/VLR1 initiates a routing request to HLR2 according to the called number N2;

Step (3), HLR2 inquiry database finds that MS2 is roaming in PLMN1, informs HLR1 to get routing information;

Step (4), after HLR1 receives the notice of getting the routing information message, initiates the request of getting the roaming number to MSC/VLR2 with N1;

Step (5), MSC/VLR2 returns the roaming number MSRN1 of MS2 to HLR1;

Step (6), HLR1 returns the roaming number MSRN1 of MS2 to HLR2;

Step (7), HLR2 distributes the fictitious roaming number MSRN2 of mark GMSC position, stores the corresponding relation of MSRN2 and MSRN1, is roaming number with MSRN2, responds to MSC/VLR1 circuit routing;

Step (8) MSC/VLR1 sets up the speech path to GMSC with MSRN2 as the called number;

Step (9) GMSC makes called analysis to MSRN2, gets route information to HLR2;

Step (10), HLR2 returns routing response to GMSC, and the roaming number is MSRN1;

Step (11) GMSC controls the establishment of follow-up speech path by MSC/VLR2;

Step (12) MS2 accesses and talks.

Referring to FIG. 9, similar to the situation shown in FIG. 2, the mobile station 2 (MS2) roams to the public land mobile network 1 (PLMN1), and the mobile station 1 (MS1) belonging to the public land mobile network 1 (PLMN1) initiates to the mobile The call from station 2 (MS2) calls the number N1 of MS2's MSN1 numbering plan. In the figure, HLR1 and HLR2 are entities in the system of the present invention—two logic points of the total location home register; MSC/VLR1 and MSC/VLR2 are two mobile service switching centers/visitor location registers in PLMN1.

Step (1), subscriber MS1 roaming under MSC/VLR1 initiates a call to subscriber MS2, and the called number is N1;

Step (2), MSC/VLR1 initiates a routing request to HLR1 according to the called number as N1;

Step (3), HLR1 gets roaming number to MSC/VLR2;

Step (4), MSC/VLR2 returns the roaming number response;

Step (5), HLR1 returns routing response to MSC/VLR1;

Step (6), MSC/VLR1 and MSC/VLR2 control session establishment;

In step (7), MS2 accesses and talks until one party hangs up.

In the situation shown in Figure 9, the difference between the call process and the call process in Figure 2 is: after user MS2 roams to PLMN1, it does not need to perform location registration in HLR2 in PLMN2, but only needs to register in the logic of the virtual network with PLMN1 The location registration is carried out in the entity HLR1; the location registration of MS2 can be directly registered on HLR1 which logically belongs to PLMN1. Since HLR1 and HLR2 are in the same physical entity, users can directly go to HLR1 by sharing user data After location registration, you can roam from PLMN2 of different standards to PLMN1; MSC/VLR1 can directly go to HLR1 to obtain the user’s routing information. Since HLR1 logically belongs to PLMN1, even if MSC/VLR1 and HLR2 logically belong to different standards MSC/VLR1 can also obtain the routing information of MS2 through HLR1 of the same standard logically, so as to establish a voice channel.

Referring to FIG. 10 , the call process shown in FIG. 6 is basically the same. The user MS2 is in the public land mobile network 2 (PLMN2), and the mobile station 3 (MS3) in the public land mobile network 1 (PLMN1) initiates a call to the mobile station 2 ( MS2), the calling MS2 is the mobile station ISDN number (MSISDN) N1 of the PLMN1 numbering plan MSN1. Among the figure, HLR1 and HLR2 are two logical points of the entity in the system of the present invention—the total location attribution register; GMSC is the gateway mobile switching center of PLMN1 in the system of the present invention; MSC/VLR1, MSC/VLR2 belong to PLMN2, PLMN1 respectively Mobile Services Switching Center/Visitor Location Register.

Step (1), roaming subscriber MS3 under MSC/VLR2 initiates a call to subscriber MS2, and the call number is the numbering plan number N1 of PLMN1;

Step (2), MSC/VLR2 initiates a routing request to HLR1 according to the called number N1;

Step (3), after HLR1 receives and gets routing information message, analyze subscriber location information data, find that MS2 registers successfully in PLMN2, notify HLR2 and get routing information;

Step (4), after HLR2 receives the message notice of getting routing information, sends out the roaming number request to MSC/VLR1 with N2;

Step (5), MSC/VLR1 returns the real roaming number MSRN1 of MS2 to HLR2;

Step (6), HLR2 returns the real roaming number MSRN1 of MS2 to HLR1;

Step (7), HLR1 distributes virtual roaming number MSRN2, stores the relationship between MSRN2 and MSRN1, and returns routing information to MSC/VLR2, roaming number MSRN2;

Step (8), MSC/VLR2 sets up the speech path to GMSC;

Step (9), GMSC gets routing information to HLR1;

Step (10), HLR1 sends routing response information back to GMSC, and the roaming number is MSRN1;

Step (11), GMSC controls the establishment of follow-up speech path;

Step (12), MS2 accesses and talks until one party hangs up.

The situation in FIG. 10 is basically the same as that in FIG. 6 .

If the situation in Figure 4 occurs, that is, a local user in the same home network PLMN as user MS2 initiates a call to MS2, the call process is exactly the same as in Figure 4, and has nothing to do with HLR1, and the user number assigned by HLR2 to user MS2 It is the number N2 that meets the Operator2 numbering plan, and the user does not have to pay for long-distance calls.

In the call-in and call-out processes shown in Figures 6 to 10, after the voice channel is intercepted and transferred to the GMSC in the system, various interfaces provided by the GMSC can be directly connected to the IP network, or can be connected to various different IP networks through standard interfaces. Transmission network to realize the selection of multiple transmission networks. When a mobile user calls, he can dial different numbers. If he wants to use the standard international transmission network of the international gateway office, the user can roam across the network and then continue to dial the user number assigned to the user in the roaming virtual network. (plus the country code where the roaming network is located); if you want to pass through the IP network or the transmission network directly connected to the operator, you can still dial the user number consistent with the network where the calling user is located after the user roams across the network to To achieve the purpose of choosing a long-distance transmission network.

The system of the present invention, through logical points (virtual home location registers) belonging to different networks in the same physical entity, and under the cooperation of each gateway mobile switching center in different networks, mobile users in different systems and different regional networks Centralized management realizes that the mobile subscribers in the physical entity-the total home location register can roam freely, and can freely choose different long-distance transmission networks interconnected between various networks, so that long-distance call charges are more reasonable and favorable, and long-distance call charges are saved.

Claims (12)

1. the realization system of cellular system virtual roaming and intercommunication is characterized in that:

Total ownership location register of a centralized management is set between all need the PLMN of virtual roaming and intercommunication, and in each needs the PLMN of virtual roaming and intercommunication, is provided with one and is used for the gateway MSC that system equipment inserts;

Total ownership location register is connected with each gateway MSC, total ownership location register needs the PLMN of virtual roaming and intercommunication to be connected by signaling transfer point and each, and each gateway MSC is connected with the place PLMN and is connected with trunk transit network by gateway device.

2. the realization system of a kind of cellular system virtual roaming according to claim 1 and intercommunication, it is characterized in that: described each gateway MSC is connected with the Visited Mobile Switching Center of place PLMN, or directly is connected with the gateway MSC of PLMN inside, place.

3. the realization system of a kind of cellular system virtual roaming according to claim 1 and intercommunication is characterized in that: described trunk transit network comprises Internet and traditional long-distance transmission network.

4. the realization system of a kind of cellular system virtual roaming according to claim 1 and intercommunication, it is characterized in that: in described total ownership location register, be set to and all PLMN corresponding virtual attaching position registers that needs virtual roaming and intercommunication, the standard of each virtual attaching position register is consistent with the standard of pairing PLMN.

5. the implementation method of cellular system virtual roaming and intercommunication is characterized in that comprising:

Total each gateway MSC that belongs to location register and belong to each PLMN respectively is set; By the gateway MSC of all ownership of total ownership location register centralized control in each PLMN; The gateway MSC that belongs to respectively in each PLMN is set to system's access device, be connected with the Visited Mobile Switching Center of corresponding PLMN, or directly be connected with the gateway MSC of PLMN inside, place; To the user who opens an account in total ownership location register, when roaming arbitrarily between different PLMNs, the speech channel interception control between heterogeneous networks is selected in realization, and comprising: a. writes down called subscriber's true roaming number; B. the roaming position according to the called subscriber distributes interim Virtual User roaming number, sets up coupling and transformational relation between Virtual User roaming number and real user roaming number; C. give called subscriber's true roaming number again; Upgrade control with the position of roaming back realization roaming localization the user, comprise: send Subscriber Number for the VLR Visitor Location Register in the user of current roaming network by total ownership location register, this Subscriber Number is consistent with the current roaming network numbering, and described roamer is obtained in roaming network and the same conversation telephone expenses of original Home mobile subscriber.

6. the implementation method of a kind of cellular system virtual roaming according to claim 5 and intercommunication, it is characterized in that: described different PLMN comprises the wireless network of identical or different region, identical or different operator and identical or different system.

7. the implementation method of a kind of cellular system virtual roaming according to claim 6 and intercommunication, it is characterized in that: the wireless network of described different systems comprises Global Systems for Mobile communications and code division multiple access system.

8. the implementation method of a kind of cellular system virtual roaming according to claim 5 and intercommunication, it is characterized in that: described a total ownership location register is set, it is the logic entity that a virtual attaching position register is set for each PLMN correspondence in same physical entity, the standard of each virtual attaching position register adopts the standard of pairing PLMN, and uses the numbering plan of pairing PLMN.

9. the implementation method of a kind of cellular system virtual roaming according to claim 8 and intercommunication is characterized in that: the standard of each the virtual attaching position register in described total ownership location register can be identical also can be inequality.

10. the implementation method of a kind of cellular system virtual roaming according to claim 5 and intercommunication is characterized in that: the described user who opens an account in total ownership location register is the number that is assigned the numbering plan of described each PLMN to the user; Or distribute the number of the numbering plan of one of them or several PLMN.

11. the implementation method of a kind of cellular system virtual roaming according to claim 5 and intercommunication, it is characterized in that: the speech channel interception control between heterogeneous networks is selected in described realization, is to realize under the numbering plan of the employed called number of calling party that the makes a call condition consistent with the numbering plan of calling party's home network.

12. the implementation method of cellular system virtual roaming and intercommunication is characterized in that may further comprise the steps:

A., a total ownership location register is set and a gateway MSC that belongs to each network is set respectively in each PLMN, each gateway MSC cooperates total ownership location register to realize virtual roaming and intercommunication;

B., the logic entity of a virtual attaching position register is set for each PLMN correspondence in same total ownership location register physical entity, the standard of each virtual attaching position register adopts the standard of pairing PLMN, and uses the numbering plan of pairing PLMN;

When C. the calling party calls out roam called by the called number of the numbering plan of this home network in another network, by the virtual attaching position register of calling party's network and the virtual attaching position register of callee's network, mutual by internal information, obtain the real roaming number of callee's current roaming network, distribute the false roaming number of the gateway MSC position of sign calling party's network or callee's network to supply calling party's network pathfinding and store corresponding relation true, false roaming number;

D. again by false roaming number pathfinding to calling party's gateway MSC or callee's current roaming network in gateway MSC, from total ownership location register, obtain the true roaming number of sign callee actual location information, calling party's calling speech channel is intercepted callee's current roaming network through the transmission network of appointment.

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