RU2282314C2 - Method and system for organization of virtual roaming and communication in cell communications system - Google Patents

Abstract

FIELD: technology and system for organization of virtual roaming and communication in cell communication system.

SUBSTANCE: in cell communication system controlling of capture of voice channel to select voice channel among various networks, and controlling of position correction, to localize roaming of mobile station, may be performed for generic purpose mobile networks, positioned in different regions, belonging to different providers and implementing different formats. System includes several mobile gate commutation centers, registered in different networks and acting as system access devices, and also main supporting registry for organization of centralized control over client data. Main supporting registry may additionally be made in form of several supporting registries, matched with each network.

EFFECT: all clients, registered in the network, may execute a function of free roaming and free selection of inter-city communication method by assigning appropriate numbers to them in accordance to given enumeration plans in various networks by means of function for controlling inter-city voice channel, due to which payment for inter-city talks may be decreased.

4 cl, 10 dwg

Description

FIELD OF TECHNOLOGY

The present invention relates to mobile cellular communication technology and, in particular, to a method and system that allows free roaming to establish a connection and communication between mobile communication networks located in different regions, belonging to different providers and having different formats within the cellular communication system.

BACKGROUND

In known mobile communication systems, each mobile subscriber has a reference location, i.e. core network. When a subscriber falls into the coverage area of the external network and is outside the range of the core network, then even if his correspondent for incoming and outgoing calls is also in the roaming zone, he will pay for the calls for long-distance communication tariffs, as this will simultaneously involve resources voice channels of the basic network of the roaming zone and the basic network of the subscriber, which makes it more expensive for the subscriber to use a mobile phone. Moreover, when establishing communication between different zones, especially when they are separated by a state border, then even if the distance between them does not exceed several kilometers, but different tariffs and tariff plans apply in these zones (or countries), the fee usually increases sharply, since in this case, it is calculated on the basis of high or even ultra-high international tariffs, which drastically reduces the possibility of exchanging information and communication between users located in different countries.

To the best of the applicant’s knowledge, no reasonable solution has been found to these problems arising from the difference in tariffs and tariff plans in different zones (or countries), as well as from the variety of standard protocols of different mobile cellular communication systems. , despite the fact that specialists in this field studied these problems and put forward a number of proposals for their solution.

In the patent, published under the number CN 1225787 A, entitled "System and method for organizing multiple reference registers for a single mobile station in a cellular communication system", the applicant proposed a scheme for using multiple reference registers for a single mobile station. The system proposed in the aforementioned patent according to the organization and architecture of the network is compatible with existing mobile cellular networks, and its only difference is the addition of a program command by which the system selects the home registry OP (HLR) among all possible external networks, in which the subscriber can roam, and by assigning a number in the roaming area to a subscriber performing local roaming using a program command in order to partially reduce the long-distance communication fee. Although such a scheme can implement the function of reducing the long-distance communication charge charged when using roaming, since the long-distance communication route between several contacting networks cannot be arbitrarily selected, in reality, the cost of long-distance communication, as well as international communication, does not decrease. At the same time, since a program command was added to this scheme by which the system selects the PR in the roaming area, there is a need for a corresponding software update for each of the associated PRs. In addition, since it is necessary to organize the exchange of subscriber data between different PRs, it becomes necessary to ensure the exchange of service messages between the PRs, which, however, creates additional difficulties due to the incompatibility of the protocols of these service messages with existing mobile cellular networks and thereby limits the application of this scheme .

Figure 1-4 illustrate the process of calling a subscriber in a known GSM network. They show the case when the mobile station 2 (MC2) (MS2 - Mobile Station 2) registered in OP2 roams between the general purpose mobile network 1 (MCON1) (PLMN1 - Public Land Mobile Network 1) and MCOH2 as the called party . A detailed description of other similar cases when, for example, the mobile station MC1 roams as a called party, or MC2 roams as a caller, is not given here, since the principle and technology of the call are not changed. The illustrations show the Mobile Switching Center (MCC) / Movement Register 1 (RP1) (MSC - Mobile Switching Center / VLR1 - Visitor Location Register 1) and the Mobile Switching Center (MCC) / Movement Register 2 (RP1) (MSC / VLR2), which are registered respectively in MSON1 and MSON2 and which are network devices of a known mobile communication network, i.e. Guest Mobile Switching Center (GMSC) (VMSC - Visitor Mobile Switching Center).

As shown in FIG. 1, MS2 roams in MCH1, and MS1 from MCH2 initiates a call to MS2. Moreover, MCC / RP1 and MCC / RP2 are registered respectively in MESON1 and MCHON2, and OP1 and OP2 are registered in MCHON1 and MCHON2, respectively (the designations in Figs. 2-4 are the same as in Fig. 1).

At step (1), MC1 registered in MCC / RP1 initiates a call to MC2.

At step (2), MCC / RP1 initiates a request for a routing address on OP2 of the called terminal MS2.

At step (3), after OP2 searched the database and found that MS2 is roaming in MCH1, OP2 sends a request for a roaming number to MCC / RP2 in MCH 1.

At step (4), MCC / RP2 returns the roaming number MS2 to OP2.

At step (5), OP2 returns a response message to MCC / RP1 and returns the roaming number MS2 to MCC / RP1.

At step (6), having analyzed the roaming number MS2, MCC / RP1 establishes a voice channel between MS1 and MS2 through an international or gateway gateway, ensuring the establishment of a communication channel between two MSON networks.

In step (7), the MC2 communicates as a called party until a hang-up is made at either end.

It can be seen from the foregoing that in a known GSM network, the call is associated with the need to use several OPs (OP1 and OP2), however, OP1 and OP2 are two different physical objects that should be used in the same format mobile communication networks (i.e. both networks must be , for example, either GSM type or CDMA type). During the call, OP2 receives the roaming number MS2 directly from MCC / RP2, then returns the number to MCC / RP1; and only when the number that OP2 returns to MCC / RP1 is a real roaming number indicating the real roaming position of MS2, in order to allow MCC / RP1 to find the MS2 corresponding to MCC / RP2 with a roaming number, it becomes possible through an international or gateway gateway Establish a voice communication channel between the two MSON networks. Of course, such a technology inevitably entails payment for a call at a long-distance or even international rate.

Now turn to figure 2, where MS2 roaming in MCHON1, and MC1 from MCHON1 initiates a call to MS2.

At step (1), MC1 registered in MCC / RP1 initiates a call to MC2.

At step (2), MCC / RP1 sends a request for a routing address to OP2 of the called terminal MS2.

At step (3), after searching the database and detecting that MS2 is roaming in MCH1, OP2 sends a request for a roaming number to MCC / RP2 in MCH1.

At step (4), MCC / RP2 returns the roaming number MS2 to OP2.

At step (5), OP2 returns a response message to MCC / RP1 and returns the roaming number MS2 to MCC / RP1.

At step (6), having analyzed the roaming number MS2, MCC / RP1 establishes a voice channel between MS1 and MS2 in MCH1, providing the establishment of a communication channel within the same MCHN network.

In step (7), the MC2 communicates as a called party until a hang-up is made at either end.

It can be seen from the foregoing that, in a known GSM network, when a station MS2 is moved from MSON2 to MSON1, it is necessary for it to register in the registry OP2 of the MSON2 network through an international information channel; after the arrival of MS2 from MCHON2 to MCHON1, if the MCHON2 network protocol is different from the MCHON1 network protocol, even when MCH2 uses a device (mobile phone) of the same format as the device in MCHON1, but since other formats are accepted in OP2 and MCC / RP2, MS2 is not able to register with OP2 through MCC / RP2. In the case when MC2 is the called party, for MCC / RP 1 it is necessary to obtain information about the presence of MS2 in the OP2 through the international communication channel. This is the only way to provide access to MS2 roaming inside MCH1 and MCC / RP2, and if MCC / RP 1 and OP2 are network devices of various formats, the exchange of service information between them is impossible due to incompatibility of the formats.

In the case shown in FIG. 3, MC2 roams within MCH2, and MC3 located inside MCH1 initiates a call to MCH2.

At step (1), the MC3 roaming inside the MCC / RP2 initiates a call to the MC2.

At step (2), MCC / RP2 initiates a request for a routing address on OP2 of the called terminal MS2.

At step (3), after searching the database and detecting that MS2 is roaming in MCH2, OP2 sends a request for roaming number to MCC / RP1 in MCH2.

At step (4), MCC / RP1 returns the roaming number MS2 to OP2.

At step (5), OP2 returns a response message to MCC / RP2, and then returns the roaming number MS2 to MCC / RP2.

At step (6), having analyzed the roaming number MS2, MCC / RP2 establishes a voice channel between MS3 and MS2 through an international or gateway gateway, ensuring the establishment of a communication channel between two MSON networks.

In step (7), the MC2 communicates as a called party until a hang-up is made at either end.

The technology described above has drawbacks similar to that illustrated in FIG. 1, therefore, it will not be considered further.

Turning now to FIG. 4, where the local mobile station in MCH2 initiates a call to MS2.

In step (1), MS1 roaming within MCC / RP1 to MCH2 initiates a call to MS2.

At step (2), MCC / RP1 initiates a request for a routing address on OP2 of the called terminal MS2.

At step (3), after conducting a database search and finding that MS2 is also roaming in MCH2, OP2 sends a request for a roaming number to MCC / RP2 in MCH2.

At step (4), MCC / RP2 returns the roaming number MS2 to OP2.

At step (5), OP2 returns a response message to MCC / RP1 and returns the roaming number MS2 to MCC / RP1.

At step (6), having analyzed the roaming number MS2, MCC / RP1 establishes a voice channel between MS1 and MS2 in MSON2, ensuring the establishment of a communication channel within the same MSON network.

In step (7), the MC2 communicates as a called party until a hang-up is made at either end.

Since the call process in this case occurs within the same network, this case does not relate to the subject of discussion of the present invention.

In short, in cases where existing mobile networks have different tariff policies, it is of particular interest to be able to reduce the cost of long-distance calls, as well as to provide free choice of long-distance communication routes for free roaming and communication between mobile networks located in different regions, owned by various providers and in various formats.

SUMMARY OF THE INVENTION

The aim of the present invention is to provide a method and system for organizing virtual roaming and communication in a cellular system in order to implement the function of free roaming and communication in order to reduce the cost of subscribers to long-distance calls and provide them with the opportunity to choose a radio network suitable for quality and cost of use, and such communicate freely with each other.

The system for implementing virtual roaming and communication in a cellular system, which is the subject of the present invention, contains at least:

the main reference register (OR) for the organization of centralized services established between all general-purpose mobile networks (MES), which require virtual roaming and communication; several Gateway Mobile Switching Centers (GMSC) (GMSC - Gateway Mobile Switching Centers), providing access to system devices that are installed, respectively, inside each MSON, which requires virtual roaming and communication;

moreover, the main PR is connected to each SHMTSK, as well as to each MSON, which requires virtual roaming and communication through the signaling transit points, and each SHMTSK is connected to the local MSON and is simultaneously connected to the long-distance communication network through a gateway device.

The connection mentioned above between each SHMTSK for access to system devices and the local MSON is either a connection between each SHMTSK and the guest mobile switching center (GMSK) of the local MSON, or a direct connection between each SHMTSK and SHMTSK inside the local MSON.

A long-distance communication network is a network operating over the Internet Protocol (Internet Protocol) or a regular long-distance communication network.

The main PR has many virtual PRs that are mapped to each MSON, which requires virtual roaming and communication with other MSONs, and the format of each virtual PR is consistent with the format of the corresponding MSON.

A method for organizing virtual roaming and communication in a cellular system, which is the subject of the present invention, includes:

installation of virtual ORs as logical objects, respectively, for each MSN inside the same physical object to form the main OR, the format of each virtual OR is the same as the format of the corresponding MSN, and the numbering plan of each virtual OR is the same as relevant MSON;

the installation of several SHMTSK, which, respectively, belong to each MSON;

when the mobile station is roaming in another network, the main PR sends to the RP in the current roaming network a subscriber number according to the numbering plan of the current roaming network in accordance with the number of the GMCC in the current roaming network; and

when the calling party initiates (according to the numbering plan in the calling party’s network) a call of the called party roaming in another network, the virtual PRs, corresponding to the calling party’s network and the called party’s network in the main PR, find the current roaming network of the called party for the calling party’s GCC using the dialed number number by exchanging internal information, receiving and saving the real roaming number of the called party based on the numbering plan in the current roaming network of the called party, p the creation of a fictitious virtual subscriber roaming number corresponding to the calling SHMTSK according to the numbering plan in the virtual backbone network of the calling party, and the subsequent preservation of the correspondence between the real roaming number and the virtual subscriber roaming number, establishing a voice channel to the calling SHMTSK with the fictitious virtual subscriber roaming number and then receiving the calling SHMTSK of the real roaming number of the called party through the main PR, control of the last Establishing a voice channel and connecting to the called party.

Another way of organizing virtual roaming and communication in a cellular system includes:

installation of virtual ORs as logical objects, respectively, for each MSN inside the same physical object to form the main OR, the format of each virtual OR is the same as the format of the corresponding MSN, and the numbering plan of each virtual OR is the same as relevant MSON;

the installation of several SHMTSK, which, respectively, belong to each MSON;

when the mobile station is roaming in another network, the main PR sends the subscriber number to the RP in the current roaming network according to the numbering plan of the current roaming network in accordance with the number of the GMCC in the current roaming network; and

when the calling party initiates (according to the numbering plan in the calling party’s network) a call of the called party roaming in another network, the virtual OP corresponding to the calling party’s network and the called party’s network in the main PR finds the current roaming network of the called party using the dialed number for the calling MSC parties by exchanging internal information, obtaining and saving the real roaming number of the called party on the basis of the numbering plan in the current roaming network of the called party, mastering a fictitious virtual subscriber roaming number corresponding to the calling SHMTSK according to the numbering plan in the virtual backbone network of the calling party and then maintaining the correspondence between the real roaming number and the virtual subscriber roaming number; Establishment by the calling MCCC of the voice channel between the two MCCCs, respectively, of the calling and the called party, and then receiving by the called MCCC the real roaming number of the called party through the main PR, control of the subsequent establishment of the voice channel and connection with the called party.

Another way of organizing virtual roaming and communication in a cellular system includes:

installation of virtual ORs as logical objects, respectively, for each MSN inside the same physical object to form the main OR, the format of each virtual OR is the same as the format of the corresponding MSN, and the numbering plan of each virtual OR is the same as relevant MSON;

the installation of several SHMTSK, which, respectively, belong to each MSON;

when the mobile station is roaming in another network, the main PR sends to the RP in the current roaming network a subscriber number according to the numbering plan of the current roaming network in accordance with the number of the GMCC in the current roaming network; and

when the calling party initiates (according to the numbering plan in the calling party’s network) a call to the called party roaming in another network, the virtual PRs corresponding to the calling party’s network and the called party in the main PR are assigned a fictitious roaming number corresponding to the called SHMTSK and its return calling GMCC; Establishment by the calling GCC of a voice channel between two SHCCs corresponding to the calling and called parties; initiating by the called ShMCC request to the main PR for search in order to obtain routing information of the called party; receipt by the main PR of the real roaming number of the called party from the RP of the called party and its return to the called SHMTSK; control by the called SHMTSK the subsequent establishment of the voice channel and connection with the called party.

Different MSONs include radio networks located in the same or in different regions, belonging to the same or different providers and having the same or different formats.

Radio network formats include the Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA).

The virtual PR formats in the main PR can be the same or different.

SHMTSK, owned by MSON, is a system access device connected to the SMCC of the corresponding MSON or directly to the SHMTSK of the corresponding MSON.

The registration stage in the main PR is the assignment of numbers to the mobile station according to the numbering plans of all MSONs or the assignment of numbers or numbers according to one or more numbering plans, respectively, of one or more MSONs.

In the system of organizing virtual roaming and communication in the cellular system that is the subject of the present invention, for all MSONs that require virtual roaming and communication, a main PR is created, and in each of the MSONs that require virtual roaming and communication, add SMCC, moreover, the main PR carries out centralized management of all SHMTSK, and thus the system is formed, which is the subject of the present invention. According to the method of organizing virtual roaming between different networks, which is the subject of the present invention, several numbers are reserved for one mobile terminal using virtual ORs corresponding to each network located in the same physical object, i.e. in the main PR, moreover, one number corresponding to a specific numbering plan will be assigned depending on the position of the subscriber’s actual roaming network, and the voice channel will be automatically selected by automatically matching the called number and the location of the actual roaming network.

The main PR in the virtual roaming and communication system has the same functions as the PR in the well-known MSON, however it is an advanced PR that is functionally compatible not only with the well-known PR, but also with different networks of the MSON located in different regions belonging to different providers and having various formats. The introduction of the main PR used for centralized servicing of all MSONs that require virtual roaming and communication can be equivalent to adding the OR of a virtual roaming and communication system to each MSON of a virtual roaming and communication system, which easily allows a mobile subscriber to use the functions of free roaming and communication in all MSON, which require virtual roaming and communication; at the same time, the cost of long-distance calls during roaming between different networks, regions and formats is reduced.

In each MSON, which requires virtual roaming, connection establishment and communication, there is a ShMTSK, and the ShMTSK, which provides roaming and communication tasks, obviously differs in its functions from the well-known SHMS, which provides a connection to a public switched telephone network (PSTN) ( PSTN - Public Switching Telephone Network). SHMTSK, according to the present invention, can implement the function of switching the tariff for international calls for a mobile subscriber who opens an account in the main PR, which is the subject of the present invention, and thereby ensures the achievement of the goal of the possibility of choosing a long-distance connection route and reducing the cost of negotiations .

Communication schemes in accordance with the present invention can be implemented by supplementing a known mobile cellular network with certain devices, which is preferable to changing the hardware and software of existing equipment. Moreover, it is possible to establish roaming cross-communications between different networks, different regions and various communication formats by using the virtual roaming function implemented in the system and method that are the subject of the present invention. This allows you to reduce the cost of long-distance calls and, more importantly, provides the ability to choose the route of long-distance connections.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a diagram illustrating a first embodiment of a call process in a known GSM network.

2 is a diagram illustrating a second embodiment of a call process in a known GSM network.

3 is a diagram illustrating a third embodiment of a call process in a known GSM network.

4 is a diagram illustrating a fourth embodiment of a call process in a known GSM network.

5 is a diagram illustrating the architecture of a cellular mobile virtual roaming system according to the present invention.

FIG. 6 is a diagram illustrating a first capture method with respect to a first embodiment of a call process for implementing virtual roaming and communication in a cellular mobile system according to the present invention.

7 is a diagram illustrating a second capture method for the first embodiment of a call process for implementing virtual roaming and communication in a cellular mobile system according to the present invention.

Fig. 8 is a diagram illustrating a third capture method for the first embodiment of a call process for implementing virtual roaming and communication in a cellular mobile system according to the present invention.

9 is a diagram illustrating a second embodiment of a call process for implementing virtual roaming and communication in a cellular mobile system according to the present invention.

10 is a diagram illustrating a third embodiment of a call process for implementing virtual roaming and communication in a cellular mobile system according to the present invention.

DESCRIPTION OF A SPECIFIC IMPLEMENTATION OF THE INVENTION

The following is a more detailed description of the implementation of the invention with reference to the relevant drawings.

As can be seen from FIG. 5, which shows a simplified diagram illustrating the architecture of a cellular mobile virtual roaming system according to the present invention, there are only two interconnected and interacting MSONs, namely GSM net1 and GSM net2 (which can also be networks of other formats). The main reference registry / identification center (GOR / CI) and two SHMTSK, belonging to two MSON, shown in dashed lines, are two newly added objects in the cellular mobile virtual roaming system made in accordance with the present invention. The long-distance communication network depicted in the middle of the drawing may use either the IP protocol or any other communication mode, for example, that adopted in conventional long-distance communication networks.

GOR / QI, including the database, is connected to each of the SHMTSK and, in addition, connected to any of the MSON GSM net1 and GSM net2, which require virtual roaming and communication through the signal transfer point (STP) (STP - Signaling Transfer Point) . Each of the ShMTSK is connected to the local MSON GSM net1 or GSM net2 and, in addition, connected to the long-distance communication network (it can be an IP network or any other existing long-distance communication network) through a gateway (IP-Ш) (IP_GW). The GMCC shown in the drawing are the guest mobile switching centers MSON GSM net1 and GSM net2, respectively, which are connected to the local MSON GSM net1 or GSM net2 and its PPS, respectively.

As can be seen from the drawing, in order to organize a cellular mobile virtual roaming system according to the present invention, it is necessary, in addition to the well-known cellular mobile communication system, to create GOR / DI in MSON networks with various virtual providers and various formats covering different regions, as well as various ShMTSK, respectively, belonging to each MSON network, which allows each subscriber (called party) who opens an account in a cellular mobile virtual roaming system to freely make roaming ing between different networks ICOS, while reducing their costs to pay for long-distance calls.

At the same time, the ShMCC of each MSON ceases to be a ShMCC in the traditional sense, since it does not act as a gateway between the fixed network and the mobile network to provide connection and communication. Functionally, it rather plays the role of a transit station, which helps GOR / QI to realize channel capture functions for the selected phone number, allowing each of the ShMTSKs to get the real roaming number of the called subscriber from GOR / QI and by controlling the communication channel.

GOR / DI in accordance with the present invention, in addition to the functions of OP / DI in the traditional sense, also has the function of providing multiple OR numbers in order to implement the functions of the virtual OR / DI in a variety of MSONs belonging to many providers. In addition, to organize communication between local subscribers of mobile stations, the main PR / DI can also automatically recognize information about the location of the subscriber MS and enter the corresponding number of the mobile station ISDN (MC-ISDN) of the subscriber MS. Moreover, to implement the function of capturing a voice channel, the main PR / DI can also automatically analyze and make decisions depending on the location of the subscriber of the MS in the roaming network, assign him a temporary virtual subscriber roaming number, provide a real roaming subscriber number, and also compare the real roaming number with a temporary virtual subscriber roaming number and carry out the corresponding switching in order to ensure the capture of the voice channel. To ensure the roaming of MS between mobile networks of various formats, the main PR / DI can be compatible with various data formats of the MS, and, in particular, compatibility should provide recognition of signals of various formats.

The interaction between networks of different providers, different systems and different regions is important, mainly for location correction and call provision. The following is a more detailed description of the call process and the location of the subscriber in the cellular mobile virtual roaming system in accordance with the present invention, with reference to Fig.6 - 10.

For simplicity, suppose that in the cellular virtual mobile roaming system shown in FIGS. 6 to 10, there are two ISON network providers, referred to as “Operator 1” and “Operator 2”, respectively. At the same time, "Operator 1" has an MSON1 network of the GSM or CDMA format, and "Operator 2" has an MSON2 network of the CDMA or GSM format. In this case, the establishment of communication between the two networks mentioned implies communication between different providers, different systems and different regions. The latter means that the MC-ISDN numbering plans for the two providers are, generally speaking, different. Suppose that the provider “Operator 1” has adopted the numbering plan MCN1, indicated by the number N1, and the provider “Operator 1” has adopted the numbering plan MCN2, indicated by the number N2.

Assume also that for MC-ISDN in the main PR of the virtual roaming system two numbering plans are adopted: MCN1 and MCN2; The main PR of the virtual roaming system has two OP identification numbers (OP IDs), which are the OP numbers of the networks MCH1 and MCH2, respectively: OP ID1 and OP ID2, and the systems use IMSI as the international mobile subscriber identifier (IMSI - International Mobile Subscriber Identity) provider "Operator 1".

The location correction procedure in the present invention is implemented as follows. Taking into account the difference in the numbers of the MSC / RP (MCC / RP1 and MCC / RP2) after completing the location correction by the called mobile station, the main PR assigns the numbers of the mobile station, consistent with the numbering plan of the network in which the called subscriber is roaming, to the MCC / RP 1 or MCC / RP2, which carries out roaming within MCH1 or MCH2, respectively: MCN1 or MCN2. This means sending different OP ID numbers in accordance with the different numbers of the MCC / RP in the local area where the called subscriber is roaming, i.e. PR numbers - PR ID1 and PR ID2 - in the two networks MCH1 and MCH2. Thus, it becomes possible to implement the function of two or more ORs, as virtual objects, and organize centralized management of various roaming networks, as well as assign an MS number depending on the position of the roaming area. Due to this, the fee for incoming and outgoing calls can be reduced.

Suppose now that there is a mobile station MCb (with an open account) in a virtual roaming system made in accordance with the present invention, as well as a mobile station MCA, which is registered with Operator 2 and in MCHON2 (using the MCN2 numbering plan) and which, when roaming in MCH2, initiates an MCb call. There are two possible scenarios:

(1) When the MCa dials the N1 number MCb obtained in accordance with the numbering plan MCN1, then, given that the MCb and the MCa are not currently in the same MCON2, the MSC / RP2 of the MCON2 network where the calling MCA is located may Connect directly to an international gateway in this case, if the calling ISA does not have international authorization, the call will be barred.

(2) When the MCA dials the number N2 of the MCb station, obtained in accordance with the numbering plan MCN2, then, given that at the moment this number is the subscriber number in the MCON2 network of the provider "Operator 2", MCC / RP2 of the network MCON2, where the calling MSA can initiate a call through a virtual roaming system according to the present invention.

Similarly, if a subscriber registered in MCH1 initiates a call to a subscriber who has opened an account in the main PR of the virtual roaming system according to the present invention, and if this results in dialing the number obtained according to the numbering plan MCN1 (N1), then the connection can be established; otherwise, the caller can initiate a call to the subscriber having the number according to the MCN2 (N2) numbering plan only if he has international authorization.

Next, with reference to Fig.6 - 10 is a more detailed description of the correction of location, rules and call procedures in accordance with the concept that is the subject of the present invention.

6-10 illustrate the case when MC2 registered in OP2 acts as the called party during the period when it roams between MCHON1 and MCHON2.

Consider the case depicted in FIG. 6 and similar to that illustrated in FIG. 1. While MC2 roams in MCH1, MC1 in MCH2 initiates a call to MC2 by dialing N2 assigned according to the MCN2 numbering plan. Depicted in the drawings, OP1 and OP2 are two logical points in one object, namely, in the main PR according to the present invention; SHMTSK and SHMTSK2 are gateway mobile switching centers registered in MSON2 and MSON1, respectively, according to the present invention, and MCC / RP1 and MCC / RP2 are two MCC / RP registered in MSON1 and MSON2 and related to MS1 and MS2, respectively.

At step (1), MC1 roams in MCH2, and the MSC / RS initiates a call to MC2 by dialing N2 (according to the calling rules, this should be N2, because if it was N1, the subscriber MC1 would have to have an international call authorization).

At step (2), MCC / RP1 initiates a request to OP2 for obtaining routing information based on the called number N2.

At the stage (3), having established by the search results in the database that MS2 is roaming in MSON1, OP2 sends OP1 a notification about the need to obtain routing information.

At step (4), having received a notification about the need to obtain routing information, OP1 initiates a request to the MCC / RP2 to receive a roaming number using N1.

At step (5), MCC / RP2 returns OP1 the real roaming number MS2, i.e. MCPN1.

At step (6), having saved the real roaming number MCPN1 of station MS2, OP1 sends OP2 a notification that OP1 has already received the real roaming number MCPN1 of station MS2, at the same time assigns a fictitious roaming number MCPN2 indicating the location of SHMTSK2, returns it to OP2 and keeps the correspondence between real roaming number MCPN1 of station MS2 and fictitious roaming number MCPN2.

At step (7), OP2 returns a response message to MCC / RP1 using the dummy roaming number MCPN2 as the roaming number.

At steps (8) and (9), MCC / RP 1 establishes a voice communication channel with SHMTSK2 through ShMTSK with a fictitious roaming number MCPN2 as the called number.

At step (10), SHMTSK2 analyzes the fictitious roaming number MCPN2 and initiates a request for obtaining routing information to OP1.

At step (11), OP1 searches for a correspondence between the real roaming number MCPN1 and the dummy roaming number MCPN2, obtains the real roaming number MCPN1 of station MS2, and returns MCPN1 to SHMTSK2 as a response message.

At step (12), SHMTSK2 controls the process of subsequent establishment of a voice channel through MCC / RP2.

At step (13), the MC2 communicates as the called party until a hook is placed on either end.

As can be seen from Fig.6, the difference between this call technology from that shown in Fig.1 is as follows: OP1 and OP2 are actually the same physical object and can be implemented as registers of OPs registered in different networks, which is equivalent to two different logical objects, and the network format of these logical objects can be either the same or different, for example, one object can have the GSM format and the other the CDMA format. OP2 receives the roaming number MS2 from MCC / RP2 through OR1 to MCH1, which is implemented by the center MCC / RP2 instead of receiving the number directly from MCC / RP2 of the network MCH1, so the main PR performed according to the present invention can actually support two logical entities of different of formats - OP1 and OP2, with OP1 supporting the format of the MCHON1 network, while OP2 supports the format of the MCHON2 network, and signal conversion to ensure compatibility in formats between OP1 and OP2 is carried out due to the interaction between internal communities iyami. OP2 returns to МЦК / РП1 not a real roaming number indicating the actual position of MC2, but a fictitious roaming number indicating the location of ШМЦК2, in order to allow МЦК / РП1 to determine the location of ШМЦК and to contact it using a fictitious roaming number; after that, SHMTSK and SHMTSK2 receive a real roaming number from OR1 containing real information about the location of MS2, in response to requests for route information, after which ShMTSK2 blocks and switches the call channel from MS1 to MSON1 through a transmission network assigned in accordance with real roaming MC2 number.

Since MCH1 and MCH2 shown in FIG. 6 have different formats, it is necessary to create ShMTSK2 in MCH1, and the fictitious roaming number returned from OP2 contains information about the location of ShMTSK2 in MCH1, and not about the location of ShMTSK in MCH2. When the voice channel is blocked and switched to ШМЦК2 in МСОН1, then, since ШМЦК2 has the same format as МЦК / РП2, ШМЦК2 can receive a real roaming number МС2 directly from ОР1, and then turn to МЦК / РП2 in accordance with the real roaming number MS2.

Consider now the case shown in FIG. 7, which is similar to the case shown in FIG. 6, except that a different capture method is used here.

In step (1), MC1, which roams at MCC / RP1, initiates a call to MC2 using call number N2.

At step (2), MCC / RP1 initiates a request to OP2 for obtaining routing information based on the call number N2.

At the stage (3), having established by the search results in the database that MS2 is roaming in MSON1, OP2 sends OP1 a notification about the need to obtain routing information.

At step (4), having received a notification about the need to obtain routing information, OP1 detects that this is an internal message initiated by OP2 and assigns a fictitious roaming number MCPN2 indicating the position of SHMTSK2, after which it returns the OP2 number instead of receiving the routing information from MCC / RP2.

At step (5), OP2 returns a route response to MCC / RP1, with MCPN2 as the roaming number.

At steps (6) and (7), MCC / RP1 establishes a voice communication channel with SHMTSK2 through SHMTSK with the number MCPN2 as the called number.

At step (8), SHMTSK2 analyzes the MCPN2 number and sends OP1 a request for routing information.

At step (9), OP1 initiates a request to MCC / RP2 to receive a roaming number, using the number N1.

At step (10), MCC / RP2 returns OP1 roaming number MS2, i.e. MCPN1.

At step (11), OP1 returns a route response to SHMTSK2 with MCPN1 as a roaming number.

At step (12), SHMTSK2 controls the process of subsequent establishment of the voice channel.

In step (13), the MC2 communicates as a called party.

The call process shown in FIG. 8 is similar to the case shown in FIG. 6, except that another capture method is used here.

In step (1), MC1, which roams at MCC / RP1, initiates a call to MC2, using N2 as the called number.

At step (2), MCC / RP1 initiates a request to OP2 for obtaining routing information based on the call number N2.

At the stage (3), having established by the search results in the database that MS2 is roaming in MSON1, OP2 sends OP1 a notification about the need to obtain routing information.

At step (4), having received a notification about the need to obtain routing information, OP1 initiates a request to the MCC / RP2 for receiving a roaming number, using the number N1.

At step (5), MCC / RP2 returns OP1 roaming number MS2, i.e. MCPN1.

At step (6), OP1 returns OP2 roaming number MC2, i.e. MCPN1.

In step (7), after assigning the virtual roaming number MCPN2 indicating the position of the ShMCC, OP2 maintains the correspondence between MCPN2 and MCPN1, after which it returns the route response to MCC / RP1 with MCPN2 as the roaming number.

At step (8), MCC / RP1 establishes a voice communication channel with the SMCC with the MCPN2 number as the called number.

At step (9), after analyzing the called MCPN2 number, the SMCC sends OP2 a request for routing information.

At step (10), OP2 returns a route response to the ShMCC with MCPN1 as the roaming number.

At step (11), the SMCC controls the process of the subsequent establishment of the voice channel through the MCC / RP2.

In step (12), the MC2 communicates as a called party.

Turning now to FIG. 9, a case similar to that shown in FIG. 2 is shown. Station MS2 roams in MSON1, and station MS1 registered in MSON1 initiates a call to MS2, and the called number MS2 is number N1 according to the numbering plan MCN1. Depicted in this drawing, OP1 and OP2 are two logical points in one object, namely, in the main PR, according to the present invention, with MCC / RP1 and MCC / RP2 are two MCC / RP in MCH1.

At step (1), MC1 roaming in MCC / RP1 initiates a call to MC2, and the called number is N1.

At step (2), MCC / RP1 initiates a request to OP1 to obtain routing information related to the called number N1.

At step (3), OP1 sends to MCC / RP2 a request for a roaming number.

At step (4), MCC / RP2 returns OP1 roaming number.

At step (5), OP1 returns the MSC / RP1 response about the route.

At step (6), MCC / RP1 and MCC / RP2 control the process of subsequent establishment of the voice channel.

In step (7), the MC2 communicates as a called party until a hang-up is made at either end.

The difference between the call processes depicted in FIG. 9 and FIG. 2 is as follows. The MS2 station, which has moved during the roaming process to MSON1, is not required to create a register in OP2 owned by MSON2; instead, it should create a registry in OP1, which is a logical entity in the same network as MCH1; MS2 location register can be created in OP1, which is logically registered in MSON1, and since OP1 and OP2 are located in the same physical object, they can share information about the subscriber, and the subscriber can create a location register in OP1. This allows the subscriber to roam from MSON2, which has a different format, to MSON1; MCC / RP1 can receive the subscriber's routing information directly from OP1, since OP1 is logically registered in MSON1. Thus, although MSC / RP1 and OP2 logically relate to network devices with different formats, MCC / RP1 can receive routing information regarding MC2 also through OP1 having the same logical format, and thus establish a voice channel.

Turning now to FIG. 10, a case similar to that shown in FIG. 6 is shown. Station MS3 registered in MSON1 initiates a call to station MS2 registered in MSON2. Moreover, the number MC2, which she dials, is the number MC-ISDNN1, assigned according to the MCN1 numbering plan of the network MCON1. The OP1 and OP2 depicted in this drawing are two logical points in one object, namely, in the main OP, according to the present invention, and the MSC is a gateway mobile switching center registered in MCHON1 according to the present invention, while MCC / RP1 and MCC / RP2 - these are two MCC / RP, registered respectively in MESON1 and MESON2.

At step (1), MC3 roaming in MCC / RP2 initiates a call to MC2 by dialing the number N1 assigned according to the numbering plan of MCH1.

At step (2), MCC / RP2 initiates a request to OP1 to obtain routing information related to the called number N1.

At step (3), upon accepting a request for routing information, OP1 analyzes the subscriber's location data and finds that station MS2 is successfully registered in MSON2, and then sends OP2 a notification about the need for routing information.

At step (4), having received a notification about the need to obtain routing information, OP2 initiates a request to MCC / RP1 to receive a roaming number using N2.

At step (5), MCC / RP1 returns OP2 the real roaming number MS2, i.e. MCPN1.

At step (6), OP2 returns OP1 the real roaming number of MS2, i.e. MCPN1.

In step (7), OP1 assigns a virtual roaming number MCPN2, stores the correspondence between MCPN2 and MCPN1, and returns routing information and roaming number MCPN2 to the MSC / RP.

At step (8), the MCC / RP2 establishes a communication channel with the ShMCC.

At step (9), the ShMCC sends a request OP1 to receive routing information.

At step (10), OP1 returns a response with routing information to the ShMCC using the MCPN1 number as a roaming number.

At step (11), the SMCC controls the process of the subsequent establishment of the voice channel.

At step (12), the MC2 communicates as the called party until a hang-up is made at either end.

The case shown in figure 10, in principle, is similar to the case shown in figure 6.

In the situation shown in FIG. 4, when the local subscriber of the same local area network MCHON as the subscriber MC2 calls MC2, the call process is no different from that shown in FIG. 4. There is no connection with OP1. OP2 assigns the MC2 subscriber number N2, corresponding to the numbering plan of the provider "Operator 2", therefore, the subscriber does not pay for long-distance calls.

After the voice channel is blocked and switched to the SMCC in the system, the process of processing incoming and outgoing calls, shown in FIGS. 6-10, can occur both through the IP network (through various interfaces provided by the SMCC) and through various communication networks (via standard interfaces) to provide the ability to select the desired communication network. When a mobile subscriber wants to make a call, he can dial different numbers for this. If he wants to talk using a standard international communication network through an international gateway, he can, having moved from the service area of one network to the service area of another network, dial the subscriber’s number assigned to him in the virtual roaming network (with the code before the code number of the country where he is roaming network). If he wants to talk using the IP network or the direct communication network connecting him to the provider, he can, having moved from the service area of one network to the service area of another network, dial the subscriber number corresponding to the network on which the calling party is located. This achieves the goal of choosing a network for long-distance calls.

Using various SHMTSK available in different networks, the system described above, made according to the present invention, can perform centralized service of subscribers roaming between networks with different formats located in different regions through logical points (virtual ORs) located in one and the same physical object, but registered in different networks, and provides the mobile subscriber registered in this physical object (i.e., in the main PR) with the opportunity to freely enable roaming, while being able to freely choose between different long-distance communication networks, thereby making the cost for long-distance calls more reasonable and acceptable and thus saving on the cost of long-distance calls.

Claims (22)

1. A system for organizing virtual roaming and communication in a cellular system, containing, at a minimum, a main reference register (OR) for organizing centralized service installed between all general-purpose mobile networks (MSS), which require virtual roaming and communication; several gateway mobile switching centers (SHMTSK), providing access to system devices, which are installed, respectively, inside each MSON, which requires virtual roaming and communication; characterized in that the main PR is connected to each SHMTSK, as well as to each MSON, which requires virtual roaming and communication, through the signaling transit points, and each SHMTSK is connected to the local MSON and simultaneously connected to the long-distance communication network through a gateway device. 2. The system for organizing virtual roaming and communication in the cellular system according to claim 1, wherein said connection between each SMCC for accessing system devices and a local MSON is either a connection between each SMCC and a guest mobile switching center (GMCC) of a local MSON, or direct connection between each SHMTSK and ShMTSK inside the local MSON. 3. The system for organizing virtual roaming and communication in the cellular system according to claim 1, wherein said long-distance communication network is a network operating over IP protocol, or a conventional long-distance communication network. 4. The system for organizing virtual roaming and communication in the cellular system according to claim 1, in which the main PR has many virtual PRs that are mapped to each MSON, which requires virtual roaming and communication with other MSONs, and the format of each virtual PR is consistent with the format relevant MSON. 5. A method of organizing virtual roaming and communication in a cellular system, which includes installing virtual ORs as logical objects, respectively, for each MSON inside the same physical object to form the main OR, and the format of each virtual OR is the same as the format corresponding MSON, and the numbering plan of each virtual PR is the same as that of the corresponding MSON; the installation of several SHMTSK, which, respectively, belong to each MSON; when a mobile station is roaming in another network, the main PR sends the subscriber number to the movement roaming register (RP) in the current roaming network according to the numbering plan of the current roaming network in accordance with the number of the GMCC in the current roaming network; and when the calling party initiates (according to the numbering plan in the calling party’s network) a call of the called party roaming in another network, the virtual PRs, corresponding to the calling party’s network and the called party’s network in the main PR, find the current roaming network of the called party for the calling party’s GCC via the dialed number by exchanging internal information, receiving and saving the real roaming number of the called party based on the numbering plan in the current roaming network of the called party, assignment of a fictitious virtual subscriber roaming number corresponding to the calling SHMTSK according to the numbering plan in the virtual backbone network of the calling party, and subsequent preservation of the correspondence between the real roaming number and the virtual subscriber roaming number; Establishment of a voice channel by the calling SMCC to the calling SMCC with a fictitious virtual subscriber roaming number and then receipt by the calling SMCC of the real roaming number of the called party through the main PR, control of the subsequent establishment of the voice channel and connection with the called party. 6. The method of organizing virtual roaming and communication in the cellular system according to claim 5, in which these various MSON include radio networks located in the same or in different regions, belonging to the same or different providers and having the same or various formats. 7. The method of organizing virtual roaming and communication in a cellular system according to any one of claim 5 or 6, in which the radio network formats include the global GSM mobile communication system and CDMA code division multiple access system. 8. The method of organizing virtual roaming and communication in the cellular system according to claim 5, in which the formats of the virtual PR in the main PR are either the same or different. 9. The method of organizing virtual roaming and communication in the cellular system according to claim 5, in which the SMCC owned by the MSON is an access system connected to the SMCC of the corresponding MSON or directly to the SMCC of the corresponding MSON. 10. The method of organizing virtual roaming and communication in the cellular system according to claim 5, in which registration in the main PR is the assignment of numbers to the mobile station according to the numbering plans of all MSONs, or the assignment of a number or numbers according to one or more numbering plans, respectively, one or several MSON. 11. A method of organizing virtual roaming and communication in a cellular system, which includes installing virtual ORs as logical objects, respectively, for each MSON inside the same physical object to form the main OR, and the format of each virtual OR is the same as the format corresponding MSON, and the numbering plan of each virtual PR is the same as that of the corresponding MSON; the installation of several SHMTSK, which, respectively, belong to each MSON; when the mobile station is roaming in another network, the main PR sends to the RP in the current roaming network a subscriber number according to the numbering plan of the current roaming network in accordance with the number of the GMCC in the current roaming network; and when the calling party initiates (according to the numbering plan in the calling party’s network) a call of the called party roaming in another network, the virtual PR corresponding to the calling party’s network and the called party’s network in the main PR finds the current roaming network of the called party using the dialed number for the MCC the calling party by exchanging internal information, receiving and storing the real roaming number of the called party based on the numbering plan in the current roaming network of the called party, Assignment to a fictitious virtual subscriber roaming number corresponding to the calling SHMTSK according to the numbering plan of the home network in a virtual calling side, and then store the correspondence between the real roaming number and the virtual subscriber roaming number; establishment of a voice channel by the calling MCCC between the two CMSCs of the calling and called parties, respectively, and then receiving by the called CMSC of the real roaming number of the called party through the main PR, control of the subsequent establishment of the voice channel and connection with the called party. 12. The method of organizing virtual roaming and communication in the cellular system according to claim 11, in which these various MSON include radio networks located in the same or in different regions, belonging to the same or different providers and having the same or various formats. 13. The method of organizing virtual roaming and communication in a cellular system according to any one of claim 11 or 12, in which the radio network formats include the global GSM mobile communication system and code division multiple access system CDMA. 14. The method of organizing virtual roaming and communication in the cellular system according to claim 11, in which the formats of the virtual PR in the main PR are either the same or different. 15. The method of organizing virtual roaming and communication in the cellular system according to claim 11, in which the SMCC owned by the MSON is an access system connected to the SMCC of the corresponding MSON or directly to the SMCC of the corresponding MSON. 16. The method of organizing virtual roaming and communication in the cellular system according to claim 11, in which the registration in the main PR is the assignment of numbers to the mobile station according to the numbering plans of all MSONs or the assignment of numbers or numbers according to one or more numbering plans of one or more MSONs, respectively. 17. A method of organizing virtual roaming and communication in a cellular system, which includes installing virtual ORs as logical objects, respectively, for each MSON inside the same physical object to form the main OR, and the format of each virtual OR is the same as the format of the corresponding MSON and the numbering plan of each virtual PR is the same as that of the corresponding MSON, the installation of several ShMCCs, which respectively belong to each MSON; when the mobile station is roaming in another network, the main PR sends to the RP in the current roaming network a subscriber number according to the numbering plan of the current roaming network in accordance with the number of the GMCC in the current roaming network; and when the calling party initiates (according to the numbering plan in the calling party’s network) a call of the called party roaming in another network, the virtual PRs corresponding to the calling party’s network and the called party in the main PR are assigned a fictitious roaming number corresponding to the called SHMTSK and return its calling GMTSK; Establishment by the calling GCC of a voice channel between two SHCCs corresponding to the calling and called parties; initiating by the called ShMCC request to the main PR for search in order to obtain routing information of the called party; receipt by the main PR of the real roaming number of the called party from the RP of the called party and its return to the called SHMTSK; control by the called SHMTSK the subsequent establishment of the voice channel and connection with the called party. 18. The method of organizing virtual roaming and communication in the cellular system according to 17, in which these various MSON include radio networks located in the same or in different regions, belonging to the same or different providers and having the same or various formats. 19. The method of organizing virtual roaming and communication in a cellular system according to any one of clause 17 or 18, in which the radio network formats include the global GSM mobile communication system and code division multiple access system CDMA. 20. The method of organizing virtual roaming and communication in the cellular system according to 17, in which the formats of the virtual PR in the main PR are either the same or different. 21. The method of organizing virtual roaming and communication in a cellular system according to claim 17, wherein the SMCC belonging to the MSON is an access system connected to the SMCC of the corresponding MSON or directly to the SMCC of the corresponding MSON. 22. The method of organizing virtual roaming and communication in the cellular system according to 17, in which registration in the main PR is the assignment of numbers to the mobile station according to the numbering plans of all MSONs, or the assignment of numbers or numbers according to one or more numbering plans, respectively, of one or more MSONs .

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