Translation of Identifiers of user Installation Terminal in a Packet Network

• US 20040090990A1
• Filed: 07/28/2003
• Published: 05/13/2004
• Est. Priority Date: 08/08/2000
• Status: Active Grant

• Current Assignee: Orange S.A.
• Original Assignee: Orange S.A.
• Inventors: Charlot, Philippe
• Granted Patent: US 7,362,747 B2
• Time in Patent Office: Days
• US Class Current: 370/471
• CPC Class Codes: H04L 2101/663 Transport layer addresses, e.g. aspects of transmission control protocol [TCP] or user datagram protocol [UDP] ports
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04L 61/2514 between local and global IP addresses
• CPC Class Codes: H04L 61/2517 using port numbers
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1106 Call signalling protocols; H.323 and related
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42

Abstract

To increase addressing capacity of terminals in a packet transmission network (RP) such as the Internet, the identifier (ITe) of a terminal (Te) having a predetermined format included in a network packet (PQ1) transmitted in a client installation (IC) is translated into a predetermined identifier (IPI) of the installation (IC) having said format and included in a network packet (PQ2) which is transmitted in the packet network (RP) to a telephone service provider server and into a port number (Pe1-Pe3) corresponding to the terminal identifier (ITe) and included in a transport packet encapsulated in the packet (PQ2) transmitted in the network, or vice versa. The port number can be allocated dynamically for steps during a call involving the terminal.

Claims

1. - A method of translating identifiers (ITe) of terminals (T1-TE) in a client telecommunication installation (IC), said identifiers having a predetermined format and being included in packets (ER) in transit through a packet transmission network (RP), characterized in that

the identifier (ITe) of a terminal (Te) included as a source address (@IPS) in a first network packet (PQ1) transmitted from the terminal through the client installation (IC) is translated (E0-E4) into a predetermined identifier (IPI) of the installation (IC) having said format and included in a second network packet (PQ2) which is transmitted in the packet network (RP) to telephone service provider means (SP), and

a port number (PORT1-PORTJ) designating a voice call step (E2-EJ) involving the terminal (Te) and included in a transport packet (ET) encapsulated in the first network packet (PQ1) is translated into a port number (Pe1-PeJ) allocated dynamically to the terminal (Te) and included in a transport packet (ET) encapsulated in the second network packet (PQ2) in order to identify both said terminal and the call step involving the terminal in the provider means (SP),

and conversely, the identifier (IPI) of the installation (IC) included as a destination address (@IPD) in a third network packet (PQ3) which is transmitted in the packet network (RP) from the provider means (SP) to the installation (IC) through the packet network (RP) and the port number (Pe1-PeJ) included in a transport packet encapsulated in the third network packet (PQ3) are translated respectively into the identifier (ITe) of the terminal included in a fourth network packet (PQ4) transmitted to the terminal (Te) through the installation (IC) and the port number (PORT1-PORTJ) designating the voice call step (E2-EJ) and included in a transport packet encapsulated in the fourth network packet (PQ4).

2. - A method according to claim 1, wherein, at the time of connecting the terminal (ITe) to the installation (IC), the port number in the second network packet (PQ2) is a predetermined source port number (P0) independent of the terminal, and the service provider means (SP) allocates a respective port number (Pe1) to the terminal (Te) and transmits it as a destination port number in the transport packet included in the third network packet (PQ3) to the installation (IC).

3. - A method according to claim 1 or 2, wherein the port number (Pe2-PeJ) allocated dynamically is again available at the end of the call involving the terminal (ITe).

4. - A method according to any of claims 1 to 3, wherein the identifier (ITe) of the terminal (Te) and the port number (PORT1-PORTJ) designating a voice call step ((E2-EJ) are also included in a data field (D) of the first network packet (PQ1) and are translated respectively into the identifier (IPI) of the installation and the port number (Pe1-PeJ) allocated dynamically to the terminal (Te) which are also included in a data field (D) of the second network packet (PQ2), and conversely, the identifier (IPI) of the installation and the port number (Pe1-PeJ) allocated dynamically to the terminal (Te) are also included in a data field (D) of the third network packet (PQ3) and are translated respectively into the identifier (ITe) of the terminal (Te) and the port number (PORT1-PORTJ) designating a voice call step (E2-EJ) which are also included in a data field (D) of the fourth network packet (PQ4).

5. - A device for translating identifiers (ITe) of terminals (T1-TE) in a client telecommunication installation (IC), said identifiers having a predetermined format and being included in packets (ER) in transit through a packet transmission network (RP), characterized in that it comprises

a mapping table (TC) for matching the identifier (ITe) of a terminal (Te) included in a network packet (ER) transmitted in the installation (IC) to a port number (Pe1-Pe3) allocated dynamically and included in a transport packet (ET) encapsulated in a network packet transmitted in the packet network (RP),

control means (LTR) for replacing the identifier (ITe) of the terminal (Te) included as a source address (@IPS) in a first network packet (PQ1) transmitted by the terminal through the installation (IC) by a predetermined identifier (IPI) of the installation having said format and included in a second network packet (PQ2) which is transmitted in the packet network (RP) to telephone service provider means (SP) and for replacing a port number (PORT1-PORTJ) designating a voice call step (E2-EJ) involving the terminal (Te) and included in a transport packet (ET) encapsulated in the first network packet (PQ1) by a port number (Pe1-PeJ) allocated dynamically to the terminal (Te) and included in a transport packet encapsulated in the second network packet (PQ2), in order to identify both said terminal and the call step involving the terminal in the provider means (SP), and

control means (LFR) for replacing the identifier (IPI) of the installation (IC) included as a destination address (@IPD) in a third network packet (PQ3) which is transmitted in the packet network (RP) from the provider means (SP) to the installation (IC) through the packet network (RP) and the port number (Pe1-PeJ) included in a transport packet encapsulated in the third network packet (PQ3) respectively by the identifier (ITe) of the terminal included in a fourth network packet (PQ4) transmitted to the terminal (Te) through the installation (IC) and the port number (PORT1-PORTJ) designating the voice call step (E2-EJ) and included in a transport packet encapsulated in the fourth network packet (PQ4).

6. - A device according to claim 5, wherein the control means (LTR) delete the port numbers (Pe2-PeJ) allocated dynamically in the mapping table (TC) at the end of the call involving the terminal (Te).