RU2294060C2 - System and method for ensuring transparency of numbers in mobile communication system - Google Patents

Abstract

FIELD: affording transparency of numbers between mobile communication networks.

SUBSTANCE: platform ULYSSES-NP maintains signal relaying function (SRF), number portability register (NPR), and number portability data base (NPDB). Signal relaying function receives signals from mobile communication switching center (MSC) and provides for routing as is required to ensure portability of numbers including respective protocol conversion. Relay station converts operation of applied mobile allocation part (MAP) between networks so that call is conveyed from mobile communication switching center of outgoing network directly to mobile communication switching center of destination network.

EFFECT: ability of ensuring transparency of numbers for two or more networks using different signaling standards.

11 cl, 17 dwg

Description

Technical field

The invention aims to provide improved "transparency" of telephone numbers, especially between networks operating in accordance with various standards, such as ANSI-41 and GSM.

Discussion of known technical solutions

For network operators, it is usually desirable, and in some countries, obligatory, to provide a service that ensures the transition of subscribers from one network to another ("migration") without changing their phone numbers. Migration for subscribers should be invisible to such an extent that the subscriber can receive signals from all services that are sent to the subscriber number from any source, including:

voice and data transmission;

sending short messages;

GPRS (Universal Packet Radio Broadcast) services.

Currently, there are several ways to ensure portability of phone numbers, namely:

- Call Forwarding. A simple migration tool can be implemented using the unconditional call forwarding capabilities in GSM and ANSI-41 networks. It includes storing the entry in the home location register (HLR) for the migrated subscriber with unconditional call forwarding (CFU) to the corresponding preset number (for example, the prefix plus number) to redirect the call to another network.

This method is an inefficient and inflexible approach, as well as impractical if there are many migrating subscribers.

- Redirection upon disconnection. If the Mobile Switching Center (MSC) receives an Unknown Subscriber response from the HLR reference location register, it can assume that the number has migrated and route the call to another network (usually with a routing prefix). This method only works if there is only one possible other network.

The disadvantages of the switching based approach are that the necessary switching improvements are non-standard, can be expensive and, like the unconditional call forwarding approach, can be inefficient and inflexible.

- Migration database query similar to that used in intelligent communication networks. For ANSI-41 standard networks, messages and procedures of the Mobile Application Subsystem (MAP) are defined for querying the number portability database (NPDB), and GSM networks can use the intelligent network application protocol (INAP) from the CS-1 functionality set.

The drawbacks of the smart grid approach are that the appropriate smart grid tools must be installed on all switches (which can be expensive), and smart grid requests can have a significant impact on the switch’s performance.

The description of the international application WO 01/03446 (Nokia) considers a number portability system in which routing information about a transferred mobile subscriber is requested from the routing register.

The aim of the invention is to provide an improved system and method for ensuring portability ("transparency") of numbers for two or more networks using different signaling standards of the core network, for example GSM and ANSI-41.

SUMMARY OF THE INVENTION

According to the invention, there is provided a method for processing a call or short message in a mobile network, providing number portability between mobile networks that use different signaling standards. The method includes:

signal routing to a signaling relay and

signal conversion by the signaling relay; and relaying the converted signal by the signaling relay to the destination network.

By independently performing the conversion and routing, the relay takes on significant processing costs from the requesting network component.

According to one embodiment of the invention, the signal is routed as a request from the mobile switching center MSC or from the SMSC short message service center for routing a call or short message.

According to another embodiment of the invention, the signaling relay relays the message of the mobile application subsystem MAP to the target location register HLR of the destination network.

According to yet another embodiment of the invention, the signaling relay comprises a number portability database and refers to said database to determine how the signal should be relayed.

According to yet another embodiment of the invention, the signaling relay calls an address number portability register (NPLR) function that returns a route number that directs the call to the destination network.

According to yet another embodiment of the invention, the signaling relay transmits the operation of the MAP mobile application subsystem between networks so that a call or short message is routed from the MSC mobile switching center or the outgoing network SMSC short message service center directly to the MSC mobile switching center or short service center SMSC messaging destination network.

According to another embodiment of the invention, the signaling relay is located on a platform, and on this platform associated with both networks that communicate to provide number portability services, there is a relay.

According to yet another embodiment of the invention, the platform monitors the payload of the MAP (application mobile subsystem) in a signaling connection control subsystem (SCCP) message of signaling system No. 7 to determine the type of operation and the subscriber number.

According to another embodiment of the invention, the platform assigns a default number for numbers that are not in the number portability database.

According to another aspect, the invention provides a number portability platform comprising means for performing signaling relay operations according to the method described above.

DETAILED DESCRIPTION OF THE INVENTION

List of drawings

For a more complete understanding of the invention below is a detailed description of some forms of its implementation, only as an example, with reference to the accompanying drawings, in which:

Figure 1 is a diagram showing the process of ensuring number portability during migration between ANSI-41 and GSM networks.

Figure 2 is a diagram showing how calls directed to ANSI-41 subscribers who have moved to a GSM network are handled.

Figure 3 shows a diagram explaining the processing of calls directed from the ANSI-41 network to subscribers of the GSM network.

Figure 4 shows a diagram explaining the processing of calls directed from the GSM network to subscribers of the ANSI-41 network.

5 is a diagram showing the delivery of short messages using relay by the short message service center (SMSC).

6 is a diagram illustrating protocol conversion for transmitting short messages between networks with different protocols (ANSI-41 - GSM).

7-17 are diagrams illustrating signaling for various number transparency scenarios.

Description of Embodiments

The invention provides a system and method for ensuring portability of numbers (transparency), which work simultaneously in both systems, for example GSM and ANSI-41.

The method and system use an approach called signaling relay based on MAP (applied mobile subsystem of signaling system No. 7). The MSC Mobile Switching Center routes requests directed to numbers that may have migrated through a signaling relay that contains a migration database (number portability). If the call is intended for a subscriber of a given network, the signaling relay function (SRF) relays the signaling connection control subsystem (SCCP) message to the corresponding HLR reference location register. If the call is intended for a subscriber of another network, the Address Number Portability Register (NPLR) function is called, returning the route number that causes the call to be sent to another network. Typically, this route number is the originally dialed number with a route prefix.

The basic approach with relaying the alarm does not have any effect on other components of the network, in addition to changes in the configuration of alarm system No. 7. There is no effect on the characteristics of the switches or the HLR reference registers.

The signaling relay architecture is complemented by the function of converting the MAP operation between ANSI-41 and GSM networks so that in most cases the call can be routed directly from the MSC mobile switching center, built using one technology, to the serving MSC mobile switching center, built using another technology , thus avoiding unnecessary channel allocation.

Inter-network call relay

This approach is illustrated in FIG. The number portability platform, called Ulysses-NP, includes two signaling relay functions (SRFs), number portability database (NPDB) and address number portability register (NPLR). With this method, the signaling relay function is performed in the GSM network. This is a common case. The Ulysses-NP number portability platform always relays requests to the HLR reference location register if it is on the same network. Relaying is done at the signaling connection management subsystem (SCCP) level, so that a response can be sent directly to the requesting network component.

Since in this case the call will be received with a routing prefix indicating that the subscriber is a subscriber of the GSM network, relaying via the SRF signaling relay function is not necessary. However, it may be useful if there are several HLR reference registers. Then, using the SRF signaling relay function allows you to assign mobile subscriber numbers for a digital network with service integration / mobile subscriber numbers (MSISDN / MDN) to any HLR reference location register (the actual HLR reference location register for any MSISDN / MDN numbers can be specified).

As shown in FIG. 2, for calls originating from a GSM network that are directed to ANSI-41 network numbers, a similar procedure is performed. GSM MSC mobile switching centers will send requests to the HLR reference location register via the SRF signaling relay function. If the number has migrated to the GSM network, the request will be relayed to the required HLR location reference register. Otherwise, for non-migrated numbers, the route number that sends the call to the ANSI-41 network will be returned. This approach avoids routing a call between networks bypassing the direct path.

The Ulysses-NP platform is able to control the MAP payload in the SCCP signaling connection management message to determine the type of operation and subscriber number (MSISDN in GSM or MIN / MDN in ANSI-41). This means that the network operator can use any form of addressing for the SCCP signaling connection management subsystem. Operations can be sent to the SRF signaling relay function using a global header (with a subscriber number as a global header) or they can be sent simply using the signaling relay function execution code (DPC destination code / SSN number).

Operations oriented only to the subscriber number (such as SRI (Send-Routing-lnformation) to GSM or LOCREQ (location request) in the ANSI-41 network) are processed by the SRF signaling relay function. All subscriber mobility arrangements related to the IMSI international mobile number (or MIN mobile number) will be sent directly to the HLR reference location register.

Protocol conversion approach

If GSM and ANSI-41 networks are fully connected at the subsystem level of a digital network with Service Integration (ISUP) and provided that the subscriber does not require intelligent network services (IN) or custom applications for advanced mobile network logic (CAMEL), it becomes It is possible to route calls directly from the ANSI-41 network to the GSM network (and vice versa).

A flag indicating that direct routing is allowed is connected to the network and, optionally, to an individual number. You can enter protocol conversion and a direct query to the HLR location registers of the GSM network from the ANSI-41 network (and vice versa). If the ANSI-41 and GSM MSC mobile switching centers are completely connected at the ISUP (Digital Integrated Services User Network Subsystem) level, the call can be routed directly to the serving MSC mobile switching center, and therefore no unnecessary channel allocation is required. This is shown in FIG.

Similarly, GSM MSC mobile switching centers can send requests to the HLR reference location register via the SRF signaling relay function, which, if the number has not migrated to the GSM network, will convert the request to the IS-41 standard format, as shown in FIG. 4.

Hybrid approach

The disadvantage of the direct routing approach, protocol conversion is that the services of an intelligent network ending at the mobile station or the services of custom applications for the extended logic of mobile communication networks (CAMEL) for a subscriber cannot be called by the ANSI-41 mobile switching center, and they will not be called by the GSM mobile switching service centers when routed by the mobile station's roaming number (MSRN); similarly, IS-41 wireless intelligent network (WIN) services cannot be called by a GSM mobile switching center. The problem of intelligent network services is one of the reasons why the GSM 03.66 standard does not recommend direct routing of calls by a donor mobile switching center to a serving mobile switching center for transferred subscribers.

Typically, the operator will use a “hybrid approach” using protocol conversion and direct routing, but supplemented by call relay if the subscriber profile indicates that there are intelligent network services that should be processed by the mobile switching center in the network where the subscription was made.

All ported numbers will indicate whether direct routing is allowed. The network operator will have to take this into account when planning and implementing any intelligent IN network services terminating at mobile stations, custom applications for the advanced CAMEL mobile network logic or the WIN wireless intelligent network. Please note that the necessary information is not available in response to the SRI (Transmit Routing Information) or LOCREQ (location request) request, so this cannot be done automatically and should be provided in the number portability database.

Short termination messages at the mobile station

To perform migration with transparency of numbers, you need a way to access short message service centers (SMSC) to the migration database. The platform is capable of supporting a number of different ways. The actual choice of method will depend on the approach of the operator’s short message service center to messaging between networks with different technologies.

While it is possible to maintain a database of migrant subscribers in short message service centers, this involves the creation of several copies of the migration database, which has a significant impact on the support and operation systems, not to mention the short message service centers themselves. The invention addresses this problem.

A very simple approach is that when a message is delivered, the SMSC Short Message Service Center first requests a reference location register for the HLR in the network, which is assumed by the numbering scheme, and if this leads to an “unknown subscriber” answer, it can try another network or relay to to another short message service center (depending on the methods used for the interaction of networks of various technologies). Of course, care should be taken to avoid looping if the number is not known on any network. However, this approach will be ineffective if there are many ported numbers.

Relay between short message service centers

SMSC Short Message Service Centers in both networks send a request to the HLR reference location register for all numbers in the ANSI-41 and GSM number space via the alarm relay function. If the subscription network is the same as the requesting network (i.e., built using the same technology), the request is simply relayed to the corresponding HLR location reference register. If, however, the number has migrated to another network, there are two possibilities:

but. Act as an HLR pseudo-register and give a response that tells the short message service center that relay to another network is needed. This is only possible when the requesting short message service center belongs to the network operator (and can be adapted accordingly).

b. Provide protocol conversion and gateway. After routing the search request to the reference register of the HLR location in another network and receiving a positive response, the requesting short message service center is given a response that causes the sending of a short message through a protocol conversion gateway. This approach can support the transmission of short messages from other GSM operators to ANSI-41 network subscribers.

As with the call-related case, a request to the HLR reference register in the technology network B is shown as being relayed by the SRF signaling relay function. As implied in this diagram, SMSC short message service centers can actually be combined.

Dual Mode Short Message Service Center

To implement the approach using the dual-mode short message service center, the platform can determine the network based on the number portability database. If the subscription network is the same as the standard MAP application request message, the MAP request is simply relayed to the corresponding HLR location reference register. If the technology is different, then Ulysses-NP can convert the request of the MAP mobile application subsystem to the corresponding standard in the same way as was proposed above for call-related requests. Usually all requests will be in the same format (GSM is one of the recommended).

In addition to the basic request for re-routing, the relay will convert all other messages that are related to the delivery of short SMS messages, such as those used for alerts.

This approach is based on the ability of the SMSC Short Message Service Center to determine the technology at the address of the serving mobile switching center.

Figure 6 shows the conversion for successful message delivery.

Thus, the invention provides a system in which a network component with a high degree of availability is shared between ANSI-41 and GSM networks with a common migration database. This database contains all numbers that have migrated (“migrated”) to a network with a different technology. The invention provides a means of analyzing numbers, which is used to assign a default number (on the number owner’s network) for numbers that are not in the database.

With direct call routing to a serving mobile switching center, significant savings are achieved. The platform can be improved to perform conversions between queries to the ANSI-41 and GSM standards location reference register. There is a means to determine if such direct routing is allowed for each subscriber.

To support various short message transmission scenarios, the platform supports the option of performing the function of the HLR pseudo-register for relaying short messages and is therefore capable of performing the above procedures for transmitting short messages between networks of various technologies. If required, it can also be extended to convert a short message MAP request (SRI or SMSREQ) to the appropriate subscription network standard and return the serving MSC mobile switching center. The following subsections describe the basic signaling scenarios.

Call alarm

Normal call to ANSI-41 network subscriber (Fig. 7)

The diagram shows the basic procedure for calling a non-migrated ANSI-41 network subscriber. It also shows the procedure that can be used for an ANSI-41 network subscriber calling a GSM number who migrated to the ANSI-41 network, if any.

but. The call is accepted by the ANSI-41 network switch.

b. This switch sends a LOCREQ (location request) to the HLR location reference registers. The alarm system configuration No. 7 is such that the request is sent via the SRF (signaling relay function) of the Ulysses-NP platform.

from. The Ulysses-NP number portability platform determines that the subscriber is a subscriber to the ANSI-41 network and relays the operation to the corresponding HLR reference location register. The SRF signaling relay function may select a reference location register depending on the actual MIN / MDN (Mobile Station / Mobile Subscriber Identification Number).

d. The HLR reference location register responds with a route number (after interacting with the VLR visiting location register, etc.). This response is sent directly to the MSC Mobile Switching Center, since the relay function of the Ulysses-NP platform is only to redirect the SCCP signaling connection management subsystem.

e. A connection is being established.

Normal call to a subscriber of a GSM network (Fig. 8)

The diagram shows the basic procedure for calling a regular GSM subscriber. It also shows the procedure for a GSM subscriber to call an ANSI-41 network number that has migrated to a GSM network (without routing the call along a workaround again through the ANSI-41 network).

but. The call is accepted by the GSM network switch.

b. This switch sends a MAP SRI (Transmit Routing Information) message to the HLR's location reference registers. The alarm system configuration No. 7 is such that a message is sent by the Ulysses-NP platform SRF signaling relay function.

from. The Ulysses-NP number portability platform determines that the subscriber is a subscriber to the GSM network (either the “own” subscriber or the subscriber whose number has migrated from the ANSI-41 network) and relays the operation to the corresponding reference location register HLR. The SRF signaling relay function can select a location reference register based on the actual MSISDN (Integrated Services Digital Network Mobile Number).

d. The reference location register responds with a route number (after interacting with the VLR visit location register, etc.). This response is sent directly to the mobile switching center, since the relay function of the Ulysses-NP platform is only to redirect the SCCP signaling connection management subsystem.

e. A connection is being established.

Call to the migrated ANSI-41 number - direct routing (Fig. 9)

The diagram shows a scenario in which direct routing is supported. The platform converts the request to the HLR reference location register to GSM format, relays it to the HLR reference location register of the GSM network and converts the response again.

a, b. The call is received by the ANSI-41 switch, which sends a LOCREQ (location request) to the HLR reference registers via the signaling relay function SRF.

from. The Ulysses-NP number portability platform determines that a subscriber is a subscriber to a GSM network (for example, a subscriber whose number has migrated from the ANSI-41 network, or a "native" GSM subscriber) for which direct routing is allowed. It converts the LOCREQ (location request) to its GSM equivalent SRI (Transmit Routing Information), which is relayed to the HLR location reference register of the GSM network.

d. The reference location register of the GSM network responds with a route number (MSRN - roaming number of the mobile station).

e. The Ulysses-NP number portability platform uses the roaming number of the mobile station to form the ANSI-41 routing number (TLDN - temporary local subscriber number).

f. The ANSI-41 MSC Mobile Switching Center routes the call to the GSM MSC Mobile Switching Center.

g. This MSC service center delivers a call to the GSM handset. The mobile switching service center can be on any network.

A call from the GSM network to the subscriber of the ANSI-41 network, direct routing (figure 10)

To avoid making calls along the ANSI-41 network bypass, it is recommended that the GSM network be configured to handle all calls to the ANSI-41 network number blocks as ordinary mobile calls and to send a reference to the location reference register via the signaling relay function. The diagram shows a scenario in which direct routing is supported from GSM network subscribers to ANSI-41 network subscribers. The platform converts the request to the HLR reference location register to ANSI-41 format, relays it to the HLR reference location register of the ANSI-41 network, and converts the response again. As with routing to GSM subscribers, direct routing is not possible if there are any WIN (or other intelligent network) wireless services associated with the subscriber.

a, b. The call is received by the GSM network switch, which sends an SRI (Transmit Routing Information) message to the HLR reference location register via the SRF signaling relay function.

from. The Ulysses-NP number portability platform determines that the subscriber is a subscriber of the ANSI-41 network (for example, with an “own” ANSI-41 network number or a GSM network number that migrated to the ANSI-41 network, if possible), for which direct routing is allowed . It converts the SRI to its equivalent in the ANSI-41 network (LOCREQ), which is relayed to the ANSI-41 network's HLR location reference register.

d. The ANSI-41 HLR reference location register responds with a route number (TLDN).

e. The platform uses the temporary local subscriber number TLDN to generate the route number of the GSM network (roaming number of the mobile station MSRN). This is a direct mapping.

f. The GSM MSC mobile switching center routes the call to the ANSI-41 MSC serving mobile switching center.

g. This serving mobile switching center delivers a call to the handset of an ANSI-41 network subscriber. The serving mobile switching center MSC can be on any network.

Call to the migrated ANSI-41 network number - indirect routing (Fig. 11)

The diagram shows the procedure for calling the ANSI-41 network number, which migrated to the GSM network. It also shows the procedure for calling a subscriber of the ANSI-41 network the actual subscriber of the GSM network, if it is possible to migrate the GSM network numbers to the ANSI-41 network. This procedure is used if direct routing is prohibited by the routing profile.

a, b. The call is received by the ANSI-41 network switch, which sends the LOCREQ (location request) to the reference location registers (HLR) through the signaling relay function (SRF).

from. The Ulysses-NP number portability platform determines that the subscriber is a subscriber to the GSM network (for example, the subscriber whose number has migrated from the ANSI-41 network, or the "own" subscriber of the GSM network). It calls the HLR pseudo-register function, which returns a response with a route number including the initial number and the routing prefix (<g>). Real ANSI-41 network HLRs are not used at all.

d. The routing prefix forces the call to be routed to the GSM network. Prefixes are fully configurable, controlled by "type of address" (NoA), and they can also contain non-decimal characters.

e. The Mobile Switching Center MSC of the GSM Gateway processes the call as a call to the GSM number and sends a MAP Send-Routing-Information (SRI) message to the HLR reference registers of the GSM network. Regarding the prefix, one of the following operations can be performed:

1. Removing the prefix completely and using the original dialed number as MSISDN (mobile subscriber number of a digital network with service integration). This is a direct way - all switches can execute it.

2. Saving the prefix and using the entire route number as the MSISDN. In this case, the SRF signaling relay function separates the prefix (from the message of the MAP mobile application subsystem).

3. Removing the prefix from the MAP message, but storing it, or some other indicator, in the global header of the SCCP signaling connection management subsystem (possibly sending it directly to the HLR location reference register).

In general, to prevent circular routing, it is desirable that some indication of the prefix be obtained by the SRF signaling relay function. Since the unified SRF signaling relay function is proposed, incompatibility between the routing databases of the ANSI-41 and GSM networks is not possible, and therefore the simple option (1) of removing the prefix is probably acceptable. However, for reliability, option (2) or (3) is recommended.

f. The Ulysses-NP number portability platform determines that the subscriber is a subscriber whose number has migrated from the ANSI-41 network and relays the operation to the corresponding HLR location reference register (setting the MSISDN number, if necessary).

g, h. The HLR reference location register responds with a route number and the connection is established.

A call from a GSM network to an ANSI-41 subscriber, indirect routing (Fig. 12)

In order to avoid routing calls by a detour through the ANSI-41 network, it is recommended that the GSM network be configured to handle all calls to the ANSI-41 network number blocks as ordinary mobile calls and send a request to the HLR reference location register via the SRF signaling relay function . If the number has migrated, then the SRF signaling relay function relays it directly to the corresponding HLR reference location register. If it is the “own” ANSI-41 network number (or the number of the subscriber who migrated from the GSM network to the ANSI-41 network), then the following procedure will be used if direct routing is prohibited for this subscriber.

a, b. The call is received by the GSM network switch, which sends a MAP Send-Routing-lnformation (SRI) message to the HLR location reference registers.

from. The Ulysses-NP number portability platform determines that the subscriber is a subscriber of the ANSI-41 network (either a "native" subscriber or a subscriber whose number has migrated from the GSM network). It calls the HLR pseudo-register function, which returns a response with a route number that includes the original subscriber number and the routing prefix (shown as <t>). Real GSM HLR registers are not used at all.

d. The routing prefix forces the call to go to the ANSI-41 network.

e. The MSC Mobile Switching Center of the ANSI-41 gateway processes the call as a call to the GSM number, and sends a LOCREQ (location request) to the ANSI-41 network's HLR reference registers.

f. The Ulysses-NP number portability platform determines that the subscriber is a subscriber whose number has migrated from the ANSI-41 network and relays the operation to the corresponding HLR location reference register (by setting the mobile station identification number MIN / mobile number identification number MDN, if necessary).

g, h. The HLR reference location register responds with a route number, and a connection is established.

Short Message Transfer Procedures

The following scenarios are based on the use of relay between SMSC short message service centers. For clarity, the SMSC centers are shown as separate, however, they can be combined into one network object, in which case the relay is purely internal. If you use an integrated short message service center, you can completely bypass the SRF signaling relay function. In this case, the short message service center will first request a reference register of the location in the network, the proposed numbering scheme, and if he receives the indication "no subscriber", he can try another network.

The usual short message to the subscriber of the ANSI-41 network (Fig.13)

The diagram shows the basic procedure for transmitting a short message for a non-migrated ANSI-41 subscriber. It also shows the procedure for the ANSI-41 Network Short Message Service Center when sending a message to a GSM network number that has migrated to the ANSI-41 network.

but. The message is received by the SMSC Short Message Service Center focused on the ANSI-41 network.

b. This center sends an SMSREQ (Short Message Request) to the HLR location reference register. The configuration of alarm system No. 7 is such that a request is sent via the Ulysses-NP signaling relay function (SRF).

from. The Ulysses-NP number portability platform determines that the subscriber is a subscriber to the ANSI-41 network and relays the operation to the corresponding HLR reference location register. The SRF signaling relay function may select an HLR reference location register depending on the actual mobile station / mobile subscriber identification number (MIN / MDN).

d. The reference location register responds with information about a serving mobile switching center. This response is sent directly to the mobile switching center, since the relay function of the Ulysses-NP platform is only to redirect the SCCP signaling connection management subsystem.

e. SMSC Short Message Service Center is trying to deliver a message.

The usual short message to the subscriber of the GSM network (Fig)

The diagram shows the basic procedure for transmitting a short message to a regular subscriber of a GSM network. It also shows the procedure for a GSM subscriber sending a message to the ANSI-41 network number that has migrated to the GSM network.

but. The message is received by the SMSC short message service center oriented to the GSM network.

b. This center sends a MAP Send-Routing-lnformation-For-Short-Message (SRI-SM) message to the HLR reference location registers. The alarm system configuration No. 7 is such that a message is sent via the Ulysses-NP signaling relay function (SRF).

from. The Ulysses-NP number portability platform determines that the subscriber is a subscriber to the GSM network (either the “own” subscriber or the subscriber whose number has migrated from the ANSI-41 network) and relays the operation to the corresponding reference location register HLR. The SRF signaling relay function can select the HLR reference location register depending on the actual MSISDN.

d. The HLR reference location register responds with information about a serving mobile switching center MSC. This response is sent directly to the MSC Mobile Switching Center, since the relay function of the Ulysses-NP platform is only to redirect the SCCP signaling connection management subsystem.

e. The Short Message Service Center is trying to deliver a message.

A short message from the ANSI-41 network to a number that migrated from the ANSI-41 network (Fig. 15)

The diagram shows the procedure for sending a short message from the ANSI-41 network to the ANSI-41 network number that migrated to the GSM network. It also shows the procedure for sending a short message from an ANSI-41 network to a GSM network number.

a, b. The message is received by the ANSI-41 SMSC SMSC Short Message Service Center, which sends an SMSREQ (Short Message Service Request) to the HLR location reference registers via the SRF signaling relay function.

from. The Ulysses-NP number portability platform determines that the subscriber is a subscriber to the GSM network (for example, a subscriber whose number has migrated from the ANSI-41 network, or with a "private" GSM network number). It calls the HLR pseudo-register function, which returns a response with a special pseudo-address of the serving mobile switching center MSC.

d. This special address of the mobile switching center causes the SMSC Short Message Service Center to send a message to the SMSC SMS Short Message Service Center (which may be part of the same system).

e. The GSM-oriented SMS Short Message Service Center processes this message as a message directed to the GSM network number and sends a MAP Send-Routing-lnformation-For-Short-Message (SRI-SM) message (Send Routing Information For Short Message) ) to the HLR reference registers of the GSM network.

f. The Ulysses-NP number portability platform determines that the subscriber is a subscriber whose number has migrated from the ANSI-41 network and relays the operation to the corresponding HLR location reference register.

g, h. The HLR reference location register responds with information about a serving mobile switching center MSC, and a message is delivered.

The message from the GSM network to the subscriber of the ANSI-41 network (Fig.16)

a, b. The message is received by the GSM network-oriented SMSC Short Message Service Center, which sends an SRI-SM (Transmit Routing Information for Short Message) message to the HLR reference registers.

from. The Ulysses-NP number portability platform determines that the subscriber is a subscriber to the ANSI-41 network (either its "own" subscriber or the subscriber whose number has migrated from the GSM network). It calls the HLR pseudo-register function, which returns a response with a special pseudo-address of the serving mobile switching center MSC.

d. This special MSC Mobile Switching Center address causes the SMSC Short Message Service Center to send a message to the ANSI-41 SMSC Short Message Service Center (which may be part of the same system).

e. An ANSI-41 network-oriented SMSC Short Message Service Center processes this message as a message to a GSM network number and sends an SMSREQ (Short Message Service Request) to the ANSI-41 network location reference registers.

f. The Ulysses-NP number portability platform determines that the subscriber is a subscriber whose number has migrated from the ANSI-41 network and relays the operation to the corresponding HLR location reference register.

g, h. The HLR reference location register responds with a route number, and the message is delivered.

Integral procedure for dual-mode SMSC (Fig.17)

The SMSC Short Message Service Center can relay a short message delivery request to the HLR reference location register. The following shows how this is done for a request oriented to the GSM network. In this procedure, all requests are sent in GSM format; this means that the Ulysses-NP + number portability platform will only need to convert one way.

a, b. The message is received by the short message service center, which sends an SFSI-SM (Transmit Routing Information for Short Message) GSM request to the HLR reference registers.

from. The Ulysses-NP number portability platform determines that the subscriber is a subscriber of the ANSI-41 network (either a "native" subscriber or a subscriber whose number has migrated from the GSM network). It converts the SRI-SM request to its equivalent in the ANSI-41 standard and sends an SMSREQ (Short Message Service Request) to the ANSI-41 network's HLR reference registers.

d. The ANSI-41 HLR reference location register responds with information about a serving mobile switching center MSC.

e. The Ulysses-NP number portability platform converts the result back to GSM format and sends a response to the SMSC Short Message Service Center.

f. The SMSC Short Message Service Center determines that the serving mobile switching center MSC is an ANSI-41 network element and sends a message in the ANSI-41 network format.

This example shows only a simple view of a multi-mode script. The notification functions needed when a message cannot be delivered immediately are also processed and converted. In addition, additional processing when delivering messages from the GSM network to the ANSI-41 network is necessary if the maximum message size of the ANSI-41 standard is exceeded.

Other GSM phase 2+ non-call signaling

The GSM phase 2+ standard defines several other operations of the MAP mobile application subsystem, which refer to the number of mobile station integrated services network (MSISDN). These include CAMEL ("Custom Applications for Advanced Logic of Mobile Networking") MAP-Any-Time-lnterrogation (ATI) operations and MAP-Send-Routing-lnformation-For-Location-Services (SRI-LCS) ) (Transmit Routing Information for Location Services). If the subscriber is a subscriber of the GSM network, such operations will be directed by the Ulysses-NP number portability platform to the corresponding reference location register HLR. If the subscriber is an ANSI-41 network subscriber, they will be rejected.

In the case of using the Optimized Routing (SOR) service of the GSM network, when the database indicates that the destination subscriber is using non-GSM technology (i.e., is an ANSI-41 subscriber), the Ulysses-NP number portability platform ignores the optimized routing support (SOR) indicator ) in the operation of the MAP subsystem of the GSM standard phase 2+ and, if the request comes from a network that can understand the routing prefix, processes the request as an ordinary SRI message (Send Routing Information). If the request comes from another network, it will be rejected.

The following are some of the advantages of the invention.

- The solution is independent of suppliers and, in addition to reconfiguring the routing of alarm system No. 7, does not require any changes in the mobile switching centers or reference registers of the location of operators, but only requires minimal changes in the short message service centers.

- Optimal use of signaling and trunks between two networks.

- If number portability is a mandatory requirement in the country of the operator, the invention can be used as a complete solution for both GSM networks and ANSI-41 networks.

The invention is not limited to the described forms of its implementation and can be changed in its structure and details.

Claims (11)

1. A method for processing a call signal or short message of a mobile network to ensure transparency and portability of numbers between a first mobile network having a signaling standard and a second mobile network having a different signaling standard, wherein according to the method in the first network, the requesting component transmits a routing request to a signaling relay containing a database of number portability and an address register of number portability, the signaling relay is automatically executed nyaet protocol conversion, sends the routing information request to the second network and receives a response to the routing request from the second network, the signaling relay responds to the requesting component routing number and routes the call requesting component or a short message to the second network component, which is a call or a short message. 2. The method according to claim 1, wherein the requesting component is a mobile switching center (MSC) or a short message service center (SMSC). 3. The method according to claim 1 or 2, in which the signaling relay sends a request for routing information to the location reference register (HLR) of the second network and receives a response to the routing request from it. 4. The method according to claim 3, wherein the signaling relay relays the message of the mobile application subsystem (MAP) to the reference location register (HLR) of the destination network. 5. The method according to one of claims 1 to 4, in which the signaling relay transforms the operation of the applied mobile subsystem (MAP) between the networks so that the call or short message is routed from the mobile switching center (MSC) or the short message service center (SMSC ) of the first network directly to the Mobile Switching Center (MSC) of the second network. 6. The method according to one of claims 1 to 5, in which the signaling relay is located on a platform and on this platform associated with both networks that interact to provide number portability services, there is a relay. 7. The method according to claim 6, in which said platform contains means for monitoring the payload of the applied mobile subsystem (MAP) in the message of the signaling connection control subsystem (SCCP) of the alarm system No. 7 for determining the type of operation and the subscriber number. 8. The method according to claim 6 or 7, in which said platform contains means for assigning default numbers for numbers that are not in the number portability database. 9. A method for routing a short message from a subscriber mobile station located in a first network having a signaling standard to a second mobile network having a different signaling standard to ensure transparency and portability of numbers, wherein, according to the method, the first short message service center (SMSC ) receives a short message from a subscriber mobile station, the first short message service center sends a routing request to a signaling relay containing a portability database of numbers and the address register of number portability, the signaling relay determines, according to its address register of number portability or the database of number portability, that the subscriber has migrated and is a subscriber of the second network, and the function of the pseudo-register of the reference location of the signaling relay returns the pseudo-address of the serving mobile switching center to the first short message service center , the first short message service center sends a short message to the second short message service center the second network according to the specified address, the second short message service center sends the routing information request to the signaling relay, the signaling relay relay the routing information request to the reference location register in the second network, the reference location register in the second network responds with information about the serving mobile switching center and the second the short message service center tries to deliver a short message according to the information about the service switching center hydrochloric communication address and the mobile station to which a short message is intended. 10. A number portability platform comprising means for performing signaling relay operations in accordance with the method of any one of the preceding claims. 11. A computer program product containing program code for implementing the method according to any one of claims 1 to 9, when executed on a digital computer.

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