Terminal-to-terminal communication connection control method using IP transfer network

• US 7,782,883 B2
• Filed: 08/10/2007
• Issued: 08/24/2010
• Est. Priority Date: 04/06/2000
• Status: Expired due to Fees

• Current Assignee: The Distribution Systems Research Institute (GS1 AISBL)
• Original Assignee: The Distribution Systems Research Institute (GS1 AISBL), Miyaguchi Research Co., Ltd.
• Inventors: Furukawa, Hisao, Miyaguchi, Shoji
• Primary Examiner(s): LEVITAN, DMITRY
• Application Number:
  US11/891,615
• Publication Number:
  US 20070297423A1
• Time in Patent Office: 1,110 Days
• Field of Search: 370/401, 370351-355, 370/360, 370/389, 370/392, 379/230, 709/227, 709/230, 709/249
• US Class Current: 370/401
• CPC Class Codes: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 2101/668 Internet protocol [IP] address subnets
• 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 61/2535 Multiple local networks, e.g. resolving potential IP address conflicts
• CPC Class Codes: H04L 61/255 Maintenance or indexing of mapping tables
• CPC Class Codes: H04L 61/2564 for a higher-layer protocol, e.g. for session initiation protocol [SIP]
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• CPC Class Codes: H04L 61/4557 Directories for hybrid networks, e.g. including telephone numbers
• CPC Class Codes: H04L 63/0236 Filtering by address, protocol, port number or service, e.g. IP-address or URL
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 65/1043 Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/611 for multicast or broadcast systems for broadcast or conference H04L12/18; arrangements for broadcast or distribution combined with broadcast H04H20/00; arrangements for broadcast applications with a direct linkage to broadcast information or to broadcast space-time H04H60/00; selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS], H04W4/06
• CPC Class Codes: H04L 9/40 Network security protocols
• 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

Both a connection server and a relay connection server are installed in an IP transfer network; a function similar to a line connection control of a subscriber exchanger is applied to a connection server; a function similar to a line connection control of a relay exchanger is applied to the relay connection server; and a terminal-to-terminal communication connection control method with using the IP transfer network is realized in such a manner that a telephone set and a terminal such as an IP terminal and a video terminal transmit/receive an initial address message, an address completion message, a call pass message, a response message, a release message and a release completion message, which can be made in a 1-to-1 correspondence relationship with line connection control messages of the common line signal system. Furthermore, while an address administration table is set to a network node apparatus of an IP transfer network, means for registering addresses of the terminals into this address administration table is employed, so that an IP packet communication by a multicast manner can be realized with improving information security performance.

Claims

1. A communication system with employment of an internet protocol (IP) transfer network, wherein:

said IP transfer network includes a plurality of network node apparatus, a plurality of connection servers, and a domain name server;

a first terminal T1 outside of said IP transfer network is connected to a first network node apparatus N1 by a first logical terminal LP1 via a first communications line L1, and a second terminal T2 outside of said IP transfer network is connected to a second network node apparatus N2 by a second logical terminal LP2 via a second communications line L2;

said first network node apparatus N1 sets, in its first apparatus control table H1, a first communication record R81 including a discrimination information to discriminate said first logical terminal LP1, and said second network node apparatus N2 sets, in its second apparatus control table H2, a second communication record R82 including a discrimination information to discriminate said second logical terminal LP2;

for a request to connect to said second terminal T2, said first terminal T1 sends a first-type external IP packet 1 including a connection request and a telephone number TN2 of said second terminal T2 and a destination address of which is an address of a first connection server S1;

said first-type external IP packet 1 inputs to said first network node apparatus N1 from said first logical terminal LP1, and said first network node apparatus N1 inspects whether said first communication record R81 including a logical terminal discrimination information LX to discriminate said first logical terminal LP1 and a destination IP address EA81 contained in said first-type external IP packet 1 exists in said first network node apparatus N1 or not;

in a case that said first communication record R81 is found out by said inspection, said first network node apparatus N1 encapsulates said first-type external IP packet 1 with reference to said first communication record R81 and forms a first-type internal packet 1, and said first network node apparatus N1 sends said first-type internal packet 1 to said first connection server S1;

said first connection server S1 presents said telephone number TN2 to a domain name server DS1 and obtains an external IP address EA2 of said second terminal T2, a second internal address IA2 given for discriminating said second logical terminal LP2 and an internal address 2 of a second connection server S2 which controls a connection of said second terminal T2, and said first connection server S1 sends an initial address message including said connection request to said second connection server S2;

in response to said second connection server S2 sending out a second-type internal packet 2 including a receipt notification formed according to said connection request, said second-type internal packet 2 is converted into a second-type external IP packet 2 according to a rule of said second communication record R82 in said second network node apparatus N2 and is sent to said second terminal T2;

a third-type external IP packet 3 including a call-on notification to notify a response preparation start is sent out from said second terminal T2, said third-type external IP packet 3 is converted into a third-type internal packet 3 according to a rule of said second communication record R82 at said second network node apparatus N2 and then is received at said second connection server S2, and said second connection server S2 forms a call progress message including said call-on notification and sends it to said first connection server S1;

in response to said first connection server S1 sending out a fourth-type internal packet 4 including said call-on notification, said fourth-type internal packet 4 is converted into a fourth-type external IP packet 4 and then is received at said first terminal T1;

in response to a fifth-type external IP packet 5 including a response notification to notify a response is sent out from said second terminal 12, said fifth-type external IP packet 5 is converted into a fifth-type internal packet 5 at said second network node apparatus N2 and then is received at said second connection server S2;

said second connection server S2 forms a response message including said response notification and sends it to said first connection server S1;

in response to said first connection server S1 sending out a sixth-type internal packet 6 including said response notification and an external IP address EA2 of said second terminal T2, a sixth-type external IP packet 6 including said response notification and said external IP address EA2 is received at said first terminal T1;

said first connection server S1 instructs to set a first communication record R1 including a second internal address IA2 for discriminating said second logical terminal LP2 to said first network node apparatus N1, said second connection server S2 instructs to set a second communication record R2 including a first internal address IA1 for discriminating said first logical terminal LP1 to said second network node apparatus N2, and said communication records R1 and R2 defines a communication path P12 where an internal packet can be transferred between said network node apparatuses N1 and N2;

in response to said first terminal T1 sending a seventh-type external IP packet 7 that a destination address is said external IP address EA2 of said second terminal T2, said seventh-type external IP packet 7 inputs to said first network node apparatus N1 from said first logical terminal LP1;

said first network node apparatus N1 inspects whether said first communication record R1 including a logical terminal discrimination information LX to discriminate said first logical terminal LP1 and a destination IP address EA2 contained in said seventh-type external IP packet 7 exists in said first network node apparatus N1 or not;

in a case that said first communication record R1 is found out by said inspection, said first network node apparatus N1 converts said seventh-type external IP packet 7 into a seventh-type internal packet 7 that a destination address is said second internal address IA2 with reference to said first communication record R1;

said seventh-type internal packet 7 is transferred in said communication path P12, and said seventh-type external IP packet 7 restored at said second network node apparatus N2 is sent to said second terminal T2;

in response to said first terminal T1 sending an eighth-type external IP packet 8 including a communication cut-off request and a destination address of which is an address of said first connection server S1, an eighth-type internal packet 8 including said communication cut-off request is received at said first connection server S1; and

said first connection server S1 sends a release message (REL) including said communication cut-off request to said second connection server S2, said second connection server S2 sends a release complete message (RLC) to said first connection servers S1, and said first and second connection servers S1 and S2 are instructed to erase said first and second communication records R1 and R2.

2. A communication system with employment of an IP transfer network according to claim 1, wherein after receipt of said second-type external IP packet 2 including said receipt notification, said second terminal T2 does not send said third-type external IP packet 3 including said call-on notification.

3. A communication system with employment of an IP transfer network, wherein:

said IP transfer network includes a plurality of network node apparatus, a plurality of connection servers, and a domain name server;

a first terminal T1 outside of said IP transfer network is connected to a first network node apparatus N1 by a first logical terminal LP1 via a first communications line L1, and a second terminal T2 outside of said IP transfer network is connected to a second network node apparatus N2 by a second logical terminal LP2 via a second communications line L2;

said first network node apparatus N1 sets, in its first apparatus control table H1, a first communication record R81 including a discrimination information to discriminate said first logical terminal LP1, and said second network node apparatus N2 sets, in its second apparatus control table H2, a second communication record R82 including a discrimination information to discriminate said second logical terminal LP2;

for a request to connect to said second terminal T2, said first terminal T1 sends a first-type external IP packet 1 including a connection request and a host name HN2 of said second terminal T2 and a destination address of which is an address of a first connection server S1;

said first-type external IP packet 1 inputs to said first network node apparatus N1 from said first logical terminal LP1, and said first network node apparatus N1 inspects whether said first communication record R81 including a logical terminal discrimination information LX to discriminate said first logical terminal LP1 and a destination IP address EA81 contained in said first-type external IP packet 1 exists in said first network node apparatus N1 or not;

in a case that said first communication record R81 is found out by said inspection, said first network node apparatus N1 encapsulates said first-type external IP packet 1 with reference to said first communication record R81 and forms a first-type internal packet 1, and said first network node apparatus N1 sends said first-type internal packet 1 to said first connection server S1;

said first connection server S1 presents said host name HN2 to a domain name server DS1 and obtains an external IP address EA2 of said second terminal T2, a second internal address IA2 given for discriminating said second logical terminal LP2 and an internal address 2 of a second connection server S2 which controls a connection of said second terminal T2, and said first connection server S1 sends an initial address message including said connection request to said second connection server S2;

in response to said second connection server S2 sending out a second-type internal packet 2 including a receipt notification formed according to said connection request, said second-type internal packet 2 is converted into a second-type external IP packet 2 according to a rule of said second communication record R82 in said second network node apparatus N2 and is sent to said second terminal T2;

a third-type external IP packet 3 including a call-on notification to notify a response preparation start is sent out from said second terminal T2, said third-type external IP packet 3 is converted into a third-type internal packet 3 according to a rule of said second communication record R82 at said second network node apparatus N2 and then is received at said second connection server S2, and said second connection server S2 forms a call progress message including said call-on notification and sends it to said first connection server S1;

in response to said first connection server S1 sending out a fourth-type internal packet 4 including said call-on notification, said fourth-type internal packet 4 is converted into a fourth-type external IP packet 4 and then is received at said first terminal T1;

in response to a fifth-type external IP packet 5 including a response notification to notify a response is sent out from said second terminal T2, said fifth-type external IP packet 5 is converted into a fifth-type internal packet 5 at said second network node apparatus N2 and then is received at said second connection server S2;

said second connection server S2 forms a response message including said response notification and sends it to said first connection server S1;

in response to said first connection server S1 sending out a sixth-type internal packet 6 including said response notification and an external IP address EA2 of said second terminal T2, a sixth-type external IP packet 6 including said response notification and said external IP address EA2 is received at said first terminal T1;

said first connection server S1 instructs to set a first communication record R1 including a second internal address IA2 for discriminating said second logical terminal LP2 to said first network node apparatus N1, said second connection server S2 instructs to set a second communication record R2 including a first internal address IA1 for discriminating said first logical terminal LP1 to said second network node apparatus N2, and said communication records R1 and R2 defines a communication path P12 where an internal packet can be transferred between said network node apparatuses N1 and N2;

in response to said first terminal T1 sending a seventh-type external IP packet 7 that a destination address is said external IP address EA2 of said second terminal T2, said seventh-type external IP packet 7 inputs to said first network node apparatus N1 from said first logical terminal LP1;

said first network node apparatus N1 inspects whether said first communication record R1 including a logical terminal discrimination information LX to discriminate said first logical terminal LP1 and a destination IP address EA2 contained in said seventh-type external IP packet 7 exists in said first network node apparatus N1 or not;

in a case that said first communication record R1 is found out by said inspection, said first network node apparatus N1 converts said seventh-type external IP packet 7 into a seventh-type internal packet 7 that a destination address is said second internal address IA2 with reference to said first communication record R1;

said seventh-type internal packet 7 is transferred in said communication path P12, and said seventh-type external IP packet 7 restored at said second network node apparatus N2 is sent to said second terminal T2;

in response to said first terminal T1 sending an eighth-type external IP packet 8 including a communication cut-off request and a destination address of which is an address of said first connection server S1, an eighth-type internal packet 8 including said communication cut-off request is received at said first connection server S1; and

said first connection server S1 sends a release message (REL) including said communication cut-off request to said second connection server S2, said second connection server S2 sends a release complete message (RLC) to said first connection servers S1, and said first and second connection servers S1 and S2 are instructed to erase said first and second communication records R1 and R2.

4. A communication system with employment of an IP transfer network, wherein:

said IP transfer network includes plural network node apparatus and plural connection servers;

a first terminal T1 outside of said IP transfer network is connected to a first network node apparatus N1 by a first logical terminal LP1 via a first communications line L1, and a second terminal T2 outside of said IP transfer network is connected to a second network node apparatus N2 by a second logical terminal LP2 via a second communications line L2;

said first terminal T1 sends a connection request and a telephone number TN2 of said second terminal T2 to said first network node apparatus N1, said first network node apparatus N1 sends said connection request and said telephone number TN2 to a first connection server S1, said first connection server S1 sends an initial address message including said connection request to a second connection server S2, and said second connection server S2 a receipt notification formed according to said connection request to said second terminal T2;

a call-on notification to notify a response preparation start is sent to said second connection server S2 from said second terminal T2, said second connection server S2 forms a call progress message including said call-on notification and sends it to said first connection server S1, and said first connection server S1 sends said call-on notification to said first terminal T1;

said first terminal T1 sends a response notification to said second connection server S2, said second connection server S2 sends said response notification to said first connection server S1, and said first connection server S1 sends said call-on notification to said first terminal T1;

said first connection server S1 instructs to set a first communication record R1 including a second internal address IA2 for discriminating said second logical terminal LP2 to said first network node apparatus N1, said second connection server S2 instructs to set a second communication record R2 including a first internal address IA1 for discriminating said first logical terminal LP1 to said second network node apparanis N2, and said first and second communication records R1 and R2 defines a communication path P12 where an internal packet can be transferred between said first and second network node apparatuses N1 and N2;

in response to said first terminal T1 sending a second-type external IP packet 2 that a destination address is said a external IP address EA2 of said second terminal T2 to said first network node apparatus N1, said first network node apparatus N1 inspects whether said first communication record R1 including a logical terminal discrimination information LX to discriminate said first logical terminal LP1 and a destination IP address EA2 contained in said second-type external IP packet 2 exists in said first network node apparatus N1 or not;

in a case that said first communication record R1 is found out by said inspection, said second-type external IP packet 2 is converted into a second-type internal packet 2 that a destination address is said second internal address IA2 and said second-type internal packet 2 is transferred in said communication path P12 and said second-type external IP packet 2 restored at said second network node apparatus N2 is sent to said second terminal T2; and

in response to said first terminal T1 sending a communication cut-off request to said first connection server S1, said first and second connection servers S1 and S2 receive and send a release message (REL) or a release complete message (RLC) including said communication cut-off request and instruct to erase said communication records R1 and R2, thereby deleting said communication path P12.

5. A communication system with employment of an IP transfer network according to claim 4, wherein after receipt of said receipt notification, said second terminal T2 does not send said call-on notification.

6. A communication system with employment of an IP transfer network, wherein:

said IP transfer network includes plural network node apparatus and plural connection servers;

a first terminal T1 outside of said IP transfer network is connected to a first network node apparatus N1 by a first logical terminal LP1 via a first communications line L1, and a second terminal T2 outside of said IP transfer network is connected to a second network node apparatus N2 by a second logical terminal LP2 via asecond communications line L2;

said first terminal T1 sends a connection request and a host name HN2 of said second terminal T2 to said first network node apparatus N1, said first network node apparatus N1 sends said connection request and said host name HN2 to a first connection server S1, said first connection server S1 sends an initial address message including said connection request to a second connection server S2, and said second connection server S2 a receipt notification formed according to said connection request to said second terminal T2;

a call-on notification to notify a response preparation start is sent to said second connection server S2 from said second terminal T2, said second connection server S2 forms a call progress message including said call-on notification and sends it to said first connection server S1, and said first connection server S1 sends said call-on notification to said first terminal T1;

said first terminal T1 sends a response notification to said second connection server S2, said second connection server S2 sends said response notification to said first connection server S1, and said first connection server S1 sends said call-on notification to said first terminal T1;

said first connection server S1 instructs to set a first communication record R1 including a second internal address IA2 for discriminating said second logical terminal LP2 to said first network node apparatus N1, said second connection server S2 instructs to set a second communication record R2 including a first internal address IA1 for discriminating said first logical terminal LP1 to said second network node apparatus N2, and said first and second communication records R1 and R2 defines a communication path P12 where an internal packet can be transferred between said first and second network node apparatuses N1 and N2;

in response to said first terminal T1 sending a second-type external IP packet 2 that a destination address is a external IP address EA2 of said second terminal T2 to said first network node apparatus N1, said first network node apparatus N1 inspects whether said first communication record R1 including a logical terminal discrimination information LX to discriminate said first logical terminal LP1 and a destination IP address EA2 contained in said second-type external IP packet 2 exists in said first network node apparatus N1 or not;

in a case that said first communication record R1 is found out by said inspection, said second-type external IP packet 2 is converted into a second-type internal packet 2 that a destination address is said second internal address IA2 and said second-type internal packet 2 is transferred in said communication path PI2, and said second-type external IP packet 2 restored at said second network node apparatus N2 is sent to said second terminal T2; and

in response to said first terminal T1 sending a communication cut-off request to said first connection server S1, said first and second connection servers S1 and S2 receive and send a release message (REL) or a release complete message (RLC) including said communication cut-off request and instruct to erase said communication records R1 and R2, thereby deleting said communication path P12.