WO2021260307A1

WO2021260307A1 - Method and device for transforming a signaling message of a communication

Info

Publication number: WO2021260307A1
Application number: PCT/FR2021/051113
Authority: WO
Inventors: Bertrand Bouvet
Original assignee: Orange
Priority date: 2020-06-23
Filing date: 2021-06-18
Publication date: 2021-12-30
Also published as: FR3111509B1; FR3111509A1

Abstract

The invention relates to a method for transforming a second signaling message of a communication transmitted by a second terminal of a second user of a second telecommunications network in response to a first signaling message of the communication transmitted by a first terminal of a first user of a first telecommunications network, this method being characterized in that it comprises: - a step in which said second signaling message is obtained by a device of said first network, referred to as the transformation device; - a step in which said transformation device detects, in a field of said said second signaling message, said at least one identity of said first user; - a step in which said transformation device removes said at least one identity of said first user of said second signaling message; - a step in which said transformation device transmits said second signaling message to said first terminal.

Description

DESCRIPTION

Title: Method and device for transforming a communication signaling message.

1. Field of the invention

The invention is in the field of telecommunications and in a privileged but not limited to the level of telephony and videophone services.

2. Prior Art

Telecom operators offer many identity management services to their customers to help them with their communications. Thanks to these services, it is for example possible for a called party to know the identity of the caller when establishing a call (CLIP service for Calling Line Identification Presentation or OIP for Originating Identification Presentation). This service can be provided when the identity of the caller is received by the network of the operator of the called party and the caller has not requested the masking of his identity via a service of the CLIR type. (Calling Line Identification Restriction) or OIR (Originating Identification Restriction).

These services can also allow the provision of the identity of the called party to the calling terminal. Indeed, in the majority of calls, the COLP (COnnected Line Presentation) or TIP (Terminating Identification Presentation) service returns to the calling terminal the telephone number of the called party dialed by the caller. But when a call forwarding is applied in the called party's network, for example following a no answer or unconditional forwarding, the caller is then in communication with a third party number / terminal or the mailbox. called him. The COLP / TIP service can then display the number actually attached to replace or supplement the number entered at the caller's terminal. Of course, this is only possible if the called party has not subscribed to a COLR (COnnected Line Restriction) / TIR (Terminating Identification Restriction) type service that prevents the supply to the calling terminal of the number actually reached.

Another service provided by the operators is the display of the name of the caller (CNIP for Calling Name Identity Presentation). This service allows, when the CLIP / OIP caller number display service is subscribed and active, and when the caller number is available and not hidden, to display the called party's name to the called party. The CNIP service is particularly interesting for businesses / companies. Indeed, the presentation of their identity (name / brand) rather than a simple telephone number which is generally not known to the called party, allows more efficient communication. However, the identity displayed to the called party may contain erroneous information without the company / company concerned being aware of it, which may be harmful to it.

Telecommunications operators can also offer specific telephone services such as a call filtering service to their called customers and replace the identity of the caller with an identity of the service considered, for example a "technical" telephone number. .

All of these services can result in the modification or deletion of the calling identity displayed on the called party's terminal when establishing a call. The identity changed in this way can, for example, lead to the rejection of calls by the called party without the caller being aware of it. This may be the case when a caller unknowingly uses a telephone line with the CLIR / OIR service activated or when the CLIP / OIP service subscribed by the called party is not working or has been deactivated intentionally or unintentionally by the called party. The called party can also filter the calls on the basis of additional information provided by the CNIP service.

The calling identity displayed on the called party's terminal can also be changed as a result of poor communication management by network equipment. Indeed, the calling identity can be lost as a result of poor SIP (Session Initiation Protocol) or ISUP (ISDN Signaling User Part) signaling, for example when the call signaling is relayed by different transit networks. In addition, in the case of a SIP type network, the called party's network displays either the uncertified calling identity, that is to say declared at the level of the SIP LROM field of the SIP INVITE signaling message, or the certified calling identity added by the calling party's network with 2 possible contents, one in SIP URI format and the other in TEL URI format, each of which may have different data.

Certain regulatory services, such as emergency services, can also systematically display the identity of the caller to the called party without the caller being aware of it. Likewise, a user who calls for a value-added service, as per example an Audiotel service in France, is not necessarily aware that its operator will systematically hide his identity during the call.

It must be noted that in many cases, the caller ultimately does not have knowledge of the identity (his identity) actually returned to the called party's terminal. The telecommunications operator can offer to provide the caller with his or her real identity returned on the called party's terminal. However, obtaining this identity by the caller may not be permitted.

3. Disclosure of the invention

The invention improves the state of the art and proposes for this purpose a method for transforming a second signaling message of a communication sent by a second terminal of a second user of a second telecommunications network in response. to a first communication signaling message sent by a first terminal of a first user of a first telecommunications network, this method being characterized in that it comprises:

- a step of obtaining said second signaling message by a device of said first network, said transformation device;

a step of detecting, by said transformation device, in a field of said second signaling message, said at least one identity of said first user;

a step of deleting, by said transformation device, said at least one identity of said first user of said second signaling message;

- a step of sending, by said transformation device, said second signaling message to said first terminal.

Advantageously, according to the invention, such a method makes it possible to process the signaling of a communication between a calling user and a called user and to detect an identity included in the signaling message, this identity possibly being that of the restored caller ( displayed or vocalized) at the called party's terminal. This identity is then deleted by a transformation device located in the network of telecommunication of the operator of the calling user. The method then sends the modified signaling message to the terminal of the calling party.

Note that the detection can be carried out via the search for the identity of the first user (calling party) in a specific / predefined field of the signaling message or via the detection of a particular prefix linked to the identity of the first user located at the within a field of the signaling message.

Identity is understood to mean a sequence of characters and / or binary data which is used to identify a user or his terminal such as a telephone number (MSISDN), an e-mail address, a postal address, an IP address, a MAC address. , a name, a first name, etc.

A communication signaling message is understood to mean any message allowing the establishment of the communication or the communication itself exchanged between at least two terminals. Furthermore, no limitation is attached to the nature of the communication between the first and the second terminal. It can be a telephone or videophone call of the voice over IP (VoIP) type or sent over a network based on circuit-switched technology, or a communication sent within the framework of instant messaging or e-mail, SMS, etc.

It should be noted that the first user (ie the calling user) and the second user (ie the called user) can belong to the same network, in other words the first and the second network can be a single and the same network or on the contrary be separate networks, operated by the same operator or by different operators.

According to a particular embodiment of the invention, a method as described above is characterized in that the obtaining step is preceded by a step of insertion by a device of said second network of said at least one. at least one identity of said first user in said second signaling message.

Advantageously, this embodiment allows the insertion of the identity of the caller by a device located in the telecommunications network of the operator of the called user. This makes it possible to ensure that the identity inserted in the signaling message is indeed that restored at the level of the called party's terminal. This identity can be considered as certified by the operator of the called party. According to a particular embodiment of the invention, a method as described above is characterized in that the deletion step is conditioned by the value of at least one service parameter.

This embodiment makes it possible to condition, as a function of the value of a service parameter, the deletion in the second signaling message, by a transformation device located in the first telecommunications network (the network of the telecommunications operator of the caller), of the identity of the first user (the caller) inserted by a device of the network of the telecommunications operator of the second user (the called party). Indeed, the second user may not want the first user to obtain the identity returned on his terminal and to have subscribed to an option with his telecommunications operator allowing this identity not to be sent / provided to the first user (the appellant). The called party's telecommunications operator for example does not have the resources to process the second signaling message and therefore remove the identity of the caller from the second signaling message, the latter will then delegate removing the caller's identity from the second message to the caller's telecommunications operator. This embodiment also makes it possible to take into account the case where the service parameter is a parameter which indicates that the caller has not subscribed to a service or an option allowing him to obtain the identity (his identity) restored. by the called party's terminal during a call.

According to a particular embodiment of the invention, said at least one parameter is obtained from a server located in said second telecommunications network.

This embodiment makes it possible to obtain the service parameter from a server located in the second network, for example a server hosting the profile of the second user with the options subscribed to with its telecommunications operator.

According to a particular embodiment of the invention, said at least one parameter is obtained from said second terminal.

This embodiment makes it possible to obtain the service parameter from the second terminal in the case where the latter gives the possibility to the second user via a parameter of configuration to accept or refuse that the first user obtains the identity returned by the second terminal.

According to a particular embodiment of the invention, said at least one parameter is obtained from a server located in said first telecommunications network.

This embodiment makes it possible to obtain from a server located in the first telecommunications network a service parameter which indicates for example that the second user accepts or refuses the identity of the first user restored by the second terminal to be sent / provided to the user. first user by the first terminal. This server is for example an instance of a server shared by telecommunications operators with a database making it possible to store one or more service parameters making it possible to indicate whether a called user accepts or refuses that the identity of a user caller returned by the called party's terminal is shared / provided to the caller.

The invention also relates to a device for transforming a second communication signaling message sent by a second terminal of a second user of a second telecommunications network in response to a first communication signaling message sent by a first terminal of a first user of a first telecommunications network, said transformation device being located within said first telecommunications network, this device being characterized in that it comprises:

- a module for obtaining said second message;

- a module for detecting, in a field of said second message, at least one identity of said first user;

a module for deleting said at least one identity of said first user from said second message;

- a module for sending said second message to said first terminal.

The term module can correspond to a software component as well as to a hardware component or a set of hardware and software components, a software component itself corresponding to one or more computer programs or subroutines or more generally. to any element of a program capable of implementing a function or a set of functions as described for the modules concerned. Likewise, a hardware component corresponds to any element of a hardware assembly. (or hardware) capable of implementing a function or a set of functions for the module concerned (integrated circuit, chip card, memory card, etc.).

The invention also relates to a system for processing a second communication signaling message sent by a second terminal of a second user of a second telecommunications network in response to a first communication signaling message sent by a first terminal of a first user of a first telecommunications network, this system being characterized in that it comprises:

- an insertion device located in said second network comprising means for inserting at least one identity of said first user in said second message; a transformation device located in said first network comprising means for obtaining said second message, detecting in a field of said second message said at least one identity of said first user, deleting said at least one identity of said first user from said second message, transmitting said second message to said first terminal; the devices being arranged so that the detection, by the transformation device, of said at least one identity of said first user inserted in said second message by said insertion device triggers the deletion of the second message from said at least one identity of said first user.

The invention also relates to a server comprising a transformation device as described above.

The invention also relates to gateway equipment comprising a transformation device as described above.

The invention also relates to a terminal comprising a transformation device as described above.

The invention also relates to a computer program comprising instructions for implementing the above method according to any one of the particular embodiments described above, when said program is executed by a processor. The method can be implemented in various ways, in particular in wired form or in software form. This program can use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code, such as in a partially compiled form, or in any other. desirable shape.

The invention also relates to a recording medium or information medium readable by a computer, and comprising instructions of a computer program as mentioned above. The recording media mentioned above can be any entity or device capable of storing the program. For example, the medium may include a storage means, such as a ROM, for example a CD ROM or a microelectronic circuit ROM, or else a magnetic recording means, for example a hard disk. On the other hand, the recording media can correspond to a transmissible medium such as an electrical or optical signal, which can be carried via an electrical or optical cable, by radio or by other means. The programs according to the invention can in particular be downloaded from an Internet-type network.

Alternatively, the recording media can correspond to an integrated circuit in which the program is incorporated, the circuit being adapted to execute or to be used in the execution of the process in question.

This transformation device, this processing system and this computer program have characteristics and advantages similar to those described above in relation to the transformation method.

4. List of figures

Other characteristics and advantages of the invention will emerge more clearly on reading the following description of particular embodiments, given by way of simple illustrative and non-limiting examples, and the accompanying drawings, among which:

[Fig 1] Figure 1 illustrates an example of an implementation environment according to a particular embodiment of the invention,

[Fig 2] Figure 2 illustrates the hardware architecture of a device configured to implement the transformation method according to a particular embodiment of the invention, [Fig 3] Figure 3 illustrates steps of the transformation method a signaling message according to a particular embodiment of the invention. 5. Description of an embodiment of the invention

FIG. 1 illustrates an example of an environment for implementing the invention according to a particular embodiment of the invention. The implementation environment comprises a first terminal 101 of a user U1 connected to a telecommunications network 100, suitable for establishing or receiving communications with a second terminal 105 of a user U2 connected to a telecommunications network 103 according to state of the art. The terminals 101 and 105 are for example mobile terminals, fixed terminals, connected objects, voice assistants or any other terminal capable of establishing and receiving communications.

The telecommunications networks 100 and 103 are respectively operated by the telecommunications operators of the users U1 and U2.

The servers 102 and 104 are application servers respectively located in the telecommunications networks 100 and 103 able to relay and take charge of a communication between the terminals 101 and 105. The server 102 executes the method of transforming a signaling message.

According to a particular embodiment of the invention, the implementation environment can also include a database 106, for example located within the telecommunications network 103, accessible from the server 104 and configured to store at least one service parameter associated with an offer / option subscribed by the called party to his telecommunications operator, the value of which makes it possible to determine whether the step of removing the transformation process must be carried out.

According to a particular embodiment of the invention, the implementation environment also comprises a database 107, for example located within the telecommunications network 100, accessible from the server 102 and configured to store at least one parameter service associated with an offer / option subscribed by the caller or with an offer / option subscribed by the called party with their telecommunications operator, the value of which makes it possible to determine whether the step of removing the transformation process must be carried out. Note that the environment described in support of FIG. 1 consists of two telecommunications networks. However, in a particular embodiment of the invention, the networks 100 and 103 can be one and the same telecommunications network. In addition, the environment can include more than two telecommunications networks and include for example a third interconnection network allowing communication between the networks 100 and 103. It should also be noted that the signaling of a communication is transported in such a manner. transparent (ie without modification) between the first network and the second network in particular, when interconnection / transit networks are used between the first network and the second network, these networks convey the signaling of the communication from the first network to the second network without modifying it.

FIG. 2 illustrates the hardware architecture of a device T configured to implement the method of transforming a communication signaling message according to a particular embodiment of the invention.

In the embodiment described here, this device has the hardware architecture of a computer. It comprises in particular a processor PROC2, a random access memory MV2, a read only memory MEM2 and a non-volatile flash memory MF2. Such means are known per se and are not described in more detail here. The read only memory constitutes a recording medium in accordance with the invention, readable by the processor PROC2 and on which is recorded here a computer program PG2 in accordance with the invention, this program comprising instructions for implementing the steps of the transformation method as described above, when the program is executed by the processor PROC2. On initialization, the code instructions of the computer program PG2 are for example loaded into a memory before being executed by the processor PROC2. The processor PROC2 of the transformation unit UT2 notably implements the steps of the transformation method according to any one of the particular embodiments described in relation to FIGS. 1 and 3, according to the instructions of the computer program PG2.

The device T also comprises a first obtaining module OBT2 able to obtain communications via for example an IP network. The obtaining module OBT2 is for example used to obtain messages for signaling a communication coming from a terminal such as for example the terminal 105. The device T further comprises a transmission module SND2 capable of transmitting communication signaling messages via, for example, an IP network. The SND2 transmission module is for example used to send to a terminal such as the terminal 101 the signaling messages obtained via the OBT2 module.

The device T also comprises a DETEC2 module capable of detecting, in a field of a signaling message of a communication established between for example the calling user of the terminal 101 and the called user of the terminal 105, an identity of the calling party. inserted by a device belonging to the called party's telecommunications network, that is to say the network 103, the caller's identity having been previously restored by the called party's terminal (105).

The device T further comprises a SUPPR2 module capable of suppressing in a communication signaling message an identity of the calling user detected via the DETEC2 module.

The device T can also include a second obtaining module (not shown) able to obtain, for example, from a digital storage space such as an internal memory or a database, or from a communication signaling message or via a network request one or more service parameters. The service parameter (s) are for example parameters associated with an offer / option subscribed by the caller or with an offer / option subscribed by the called party with their telecommunications operator, the value of which makes it possible to determine whether the SUPPR2 module must delete an identity of the calling user detected in a signaling message via the DETEC2 module.

FIG. 3 illustrates the steps of the process for transforming a signaling message according to a particular embodiment of the invention. Figure 3 uses the same environment as described in support of Figure 1.

During a first step E10, the user U 1 will initiate a communication with the user U2. More precisely, the terminal 101 of the user U1 sends a SIP INVITE message to an identifier of the user U2. The identifier is for example a telephone number (MSISDN), an e-mail address, or any other identifier allowing U2 to be reachable. The SIP INVITE message sent by the terminal 101 to destination of an identifier of G user U2 is, in a known manner, a message for initiating a communication with the user U2. An identity of G user Ul, called an uncertified identity, is included in the call signaling, in the FROM field present in the header of the SIP INVITE message. The non-certified identity of the user U 1 is an identity declared by the user and / or the terminal 101 such as an MSISDN, an e-mail address, an IP address or any other string of characters and / or binary data.

It is noted that, in a known manner, the various information placed in the headers of the SIP INVITE message belong to or even constitute the signaling of the call.

Note that the signaling protocol used to initiate and then establish communication can also be H.323, MGCP, ISUP (ISDN Signaling User Part), BICC (Independent Bearer Call Control), SIP-I (Session Initiation Protocol - ISUP) ), WebRTC (Web Real Time Communication) or any other signaling protocol suitable for initiating / establishing a communication. In the remainder of the description, the signaling messages exchanged between the terminals 101 and 105 will be SIP messages.

In step E20, the SIP INVITE message is received and then taken over by the server 102 of the telecommunications network 100. On receipt of the SIP INVITE message, the server 102 can position in the signaling of the message, for example in the SIP field P- Asserted-Id an identity known as the certified identity of the caller Ul and / or modify the uncertified identity already present.

By certified identity, we mean an identity that a trusted entity (eg network operator or other trusted authority) establishes and guarantees. This certified identity can for example be an MSISDN, an e-mail address, a name or any other string of characters and / or binary data making it possible to identify the user Ul.

In step E20, the server 102 can also modify other fields of the signaling of the SIP INVITE message such as for example the SIP PRIVACY field in the case where the caller (Ul) has subscribed with his telecommunications operator to a OIR type service allowing the masking of his identity during a communication. As is known, the SIP PRIVACY field can take several values:

- "none" if the caller's number is not withheld from the called party;

- "user" if the number of the uncertified caller must be hidden from the called party;

- "id" if the number of the certified caller must be withheld from the called party; - “headers” if all the information that can provide an identity of the caller (for example the telephone number can be present in the SIP FROM, PAI, Via, AoC ... fields) must be masked from the called party.

Then, during step E21, the SIP INVITE message is sent to the server 104 located within the telecommunications network 103 of the telecommunications operator of the user U2. The SIP INVITE message is then received by the server 104 in step E31. During this step, the server 104 can, if the user U2 has subscribed to a CNIP type service with his telecommunications operator, that the OIP service is activated and that the caller has not masked his identity, consult a database with the certified and / or uncertified identity of the caller contained in the SIP INVITE message as a search key to obtain a new identity, called a resolved identity, of the caller.

Concretely, the search in the database is for example carried out on the basis of an MSISDN of the caller and the resolved identity can be the name and / or the first name of the caller or any other character string. This resolved identity can then be inserted by the server 104 in the signaling of the SIP INVITE message, for example at the level of the SIP DISPLAY parameter of the FROM field present in the SIP INVITE message.

In step E32, the server 104 transfers the SIP INVITE message to the terminal 105. Note that, just before the sending of the SIP INVITE message, the server 104 can store the identity or identities of the caller present in the signaling of the caller. message.

On reception (E42) of the SIP INVITE message, the terminal will process the message and restore, for example verbatim or verbally, an identity of the caller, that is to say an identity of the user Ul, to the user U2. In a known manner and following what has been described above, the terminal can restore different identities depending on its configuration, the configuration of the called party's network (U2) and / or the services subscribed by the users U1 and U2 with their operator. telecommunications. Thus, the terminal 105 can for example restore an uncertified identity of the caller (Ul) and / or a certified identity of the caller (Ul) present in the received SIP INVITE message. The terminal can also restore to the user U2 a resolved identity obtained from the database of the CNIP service but also an empty, "anonymous" or default identity, such as for example a predefined character string, if the OIP service of the 'called party is deactivated, if the identity of the caller present in the SIP INVITE message has been altered by network equipment or if the user U1 has the OIR service activated. The identity presented can also be a so-called "technical" identity such as a character string such as a prefix or a number. predefined telephone, associated with a telecommunications service when P user U2 has subscribed for example to an anonymous call filtering service. The technical identity then allows the user U2 to know that it is a filtered incoming call and therefore to handle this call in a specific way.

In step E43, the terminal 105 responds via a SIP 180 Ringing message. The message is then received by the server 104 in step E33. The server 104 can, during step E33, modify the signaling of the SIP 180 Ringing message and insert therein an identity, for example certified and / or uncertified, stored during step E32 and which has been restored to the user. U2 via terminal 105 during step E42. This information can for example be inserted in the SIP DISPLAY parameter of the uncertified calling identity present in the FROM field or in the SIP DISPLAY parameter of the certified calling identity of the PAI field or even in a new dedicated SIP header.

The server 104 can also obtain from the terminal 105 the identity of the caller restored by the terminal 105 via a dedicated message using the SIP protocol or any other communication protocol capable of establishing a communication between the terminal 105 and the server 104. The server 104 can also obtain the identity of the caller restored via the SIP 180 Ringing message received during step E33. This obviously assumes that the terminal 105, during step E43 has previously added to the signaling of the SIP 180 Ringing message the identity of the caller restored, for example in the SIP DISPLAY parameter of the uncertified calling identity present. in the FROM field or in the SIP DISPLAY parameter of the certified calling identity of the PAI field or even in a new dedicated SIP header.

Note that the identity of the caller restored by the terminal 105 to the user U2 can also be an identity present in a network directory or a database located at the terminal 105 such as a list of contacts or a telephone directory. Indeed, the terminal 105 can on receipt of the SIP INVITE message (E42) search a list of contacts stored locally or in a network directory for a match with an identity of the caller present in the SIP INVITE message and retrieve an associated identity. . Concretely, the terminal 105 can for example, via the MSISDN present in the FROM field of the SIP INVITE message, search its list of contacts for the name and / or the first name and / or a character string associated with the MSISDN. In step E34, the server 104 will send the SIP 180 Ringing signaling message. The SIP 180 Ringing message is then received by the server 102 during step E24.

In step E24, the server 102 can obtain, via the SIP 180 Ringing signaling message received, a service parameter previously inserted in the signaling of the SIP 180 Ringing message by the server 104 or the terminal 105. The service parameter is by example an activation status (activated / not activated) associated with an option subscribed by the user U2 with his telecommunications operator. Indeed, the user U2 may not want the caller (Ul) to obtain the calling identity returned on his terminal (105) and to have subscribed to an option with his telecommunications operator allowing this identity not to be sent. / provided to the appellant (Ul). When the telecommunications operator of the user U2 does not have the possibility of processing the message and therefore of deleting the identity of the caller following, for example, a malfunction observed on one of its servers, it can thus delegate the processing of the message to the telecommunications operator of the user Ul.

Alternatively or cumulatively, the server 102 can obtain a service parameter from a server located in the network 103. This is for example the case when the service parameter is obtained via a dedicated message originating from a server located in the network of telecommunication 103 different from the server 104.

Alternatively or cumulatively, the server 102 can obtain a service parameter from the terminal 105 via, for example, a dedicated message. This is for example the case when the user U2 declares at the level of the terminal 105, for example via the setting of a parameter, that he does not want the caller to obtain the calling identity restored on his terminal 105.

Alternatively or cumulatively, the server 102 can obtain a service parameter from a server located in the network 100. This server is for example an instance of a server shared by the telecommunications operators with a database making it possible to store one or more service parameters making it possible to indicate whether a called user (U2) accepts or refuses the identity of a calling user (U1) restored by the called party's terminal to be shared / provided to the caller (U1). Alternatively or cumulatively, the server 102 can obtain a service parameter from a database / file located at the level of the server 102. This is for example an activation status (activated / not activated) associated with an option subscribed by the 'calling to his telecommunications operator allowing the restitution (verbally or verbally) on his terminal of his identity previously restored on the called party's terminal, for example during the establishment of the communication.

In step E25, the server 102 searches a field of the signaling of the SIP Ringing message 180 for the identity of the caller (Ul) returned by the terminal 105 to the user U2 during step E42. When the search is positive, for example if the SIP DISPLAY field of the FROM field is not empty and the service parameter (s) obtained indicate that the identity of the caller (Ul) should not be returned to the calling then the transformation method removes the identity of the calling party from the SIP 180 Ringing signaling message. Thus, the caller ID returned on terminal 105 is not sent / provided to the caller (Ul). The method then transmits the SIP 180 Ringing message to the terminal 101 (E25).

In step E15, the terminal receives the SIP 180 Ringing signaling message. In the event that the user U2 has subscribed to an option with his telecommunications operator allowing the caller (U1) not to obtain the calling identity returned on his terminal (105) or that the user U1 has not subscribed with his telecommunications operator to a service allowing the restoration (verbally or verbally) on his terminal of his identity previously restored on the called party's terminal, the SIP 180 Ringing message is processed in a conventional manner by the terminal. No calling identity is returned to the caller.

According to a particular embodiment, the server 102 can, following the deletion of the identity of the caller from the SIP 180 Ringing signaling message (E25), insert a data item in the signaling of the SIP 180 Ringing message indicating that the deletion Has been done. Thus, during step E15, the terminal can, thanks to the data retrieved from the SIP 180 Ringing signaling message received, notify the user U 1 of the deletion of the identity of the caller via, for example, a vibration, a specific flashing of an LED (light-emitting diode) or a particular display.

According to a particular embodiment, the deletion of the identity of the caller (E25) can be carried out in a SIP 200 OK and / or SIP 183 In Progress and / or SIP 180 Ringing signaling message.

According to a particular embodiment, the signaling protocol used to initiate and then establish the communication can also be the H.323, MGCP, ISUP (ISDN Signaling User Part), BICC (Independent Bearer Call Control), SIP-I (Session Initiation Protocol - ISUP) or WebRTC (Web Real Time Communication). In the case of the H323, the signaling message used can for example be the SETUP message. With regard to the ISUP and BICC protocols, the signaling message can be the IAM message (Initiate Address Message). The message used by the SIP-I protocol can for its part be a combination of the messages used by the SIP and ISUP protocols. Indeed, the SIP-I protocol encapsulates the IAM message in the SIP INVITE message. For the MGCP protocol the signaling message can be the Create Connexion message and for the WebRTC a proprietary message. Likewise, the signaling messages corresponding to the SIP 180 Ringing message can be the Alerting message for the H323 protocol, the ACM (Address Completed Message) or CPG (Call ProGress) message for the ISUP or BICC protocols, the Notification Command message for the MGCP protocol and a proprietary message for the WebRTC protocol

According to a particular embodiment, the transformation method can be executed by the terminal 101.

According to a particular embodiment, the transformation method can be executed by a gateway device (not shown) located for example in the network 100. The term “gateway device” is understood to mean an intermediate device ensuring the redirection or the routing of the data packets between the various terminals and networks connected to it. The gateway equipment is for example a residential gateway which makes it possible to connect a local communication network and a wide area network such as the Internet network. Such a residential gateway integrates in particular a DHCP server. It performs the routing of data packets, and can also play the role of firewall, proxy, DNS relay (for English "Domain Name Server"), IGD service provider (for English "Internet Gateway Device", device Internet Gateway), etc. By way of example, such a service gateway can be equipment known in France under the name of “box”, such as LiveBox equipment (product sold by Orange, registered trademark).

It goes without saying that the embodiment which has been described above has been given purely as an indication and in no way limiting, and that many modifications can be easily made by those skilled in the art without departing from the scope. of the invention.

Claims

1. .Process for transforming a second communication signaling message sent by a second terminal of a second user of a second telecommunications network in response to a first communication signaling message sent by a first terminal of a first user of a first telecommunications network, this method being characterized in that it comprises:

2. The method of claim 1 wherein the obtaining step is preceded by a step of inserting by a device of said second network said at least one identity of said first user in said second signaling message.

3. The method of claim 1 wherein the deletion step is conditioned by the value of at least one service parameter.

4. The method of claim 3 wherein said at least one parameter is obtained from a server located in said second telecommunications network.

5. The method of claim 3 wherein said at least one parameter is obtained from said second terminal.

6. The method of claim 3 wherein said at least one parameter is obtained from a server located in said first telecommunications network.

7. Device for transforming a second communication signaling message sent by a second terminal of a second user of a second telecommunications network in response to a first communication signaling message sent by a first terminal. 'a first user of a first telecommunications network, said transformation device being located within said first telecommunications network, this device being characterized in that it understand :

- a module for obtaining said second message;

- a module for sending said second message to said first terminal.

8. System for processing a second communication signaling message sent by a second terminal of a second user of a second telecommunications network in response to a first communication signaling message sent by a first terminal d 'a first user of a first telecommunications network, this system being characterized in that it comprises:

- an insertion device located in said second network comprising means for inserting at least one identity of said first user in said second message;

a transformation device located in said first network comprising means for obtaining said second message, detecting in a field of said second message said at least one identity of said first user, deleting said at least one identity of said first user from said second message, transmitting said second message to said first terminal; the devices being arranged so that the detection, by the transformation device, of said at least one identity of said first user inserted in said second message by said insertion device triggers the deletion of the second message from said at least one identity of said first user.

9. Server characterized in that it comprises a transformation device according to claim 7.

10. Gateway equipment characterized in that it comprises a transformation device according to claim 7.

11. Terminal characterized in that it comprises a transformation device according to claim 7.

12. A computer program comprising instructions for implementing the method according to any one of claims 1 to 6, when the program is executed by a processor.