Terminal-to-terminal communication connection control system for IP full service
View Patent ↗The present invention relates to a terminal-to-terminal communication connection control method using an IP network characterized in that: in order for a mobile telephone set to have a telephone communication with a fixed telephone set by way of a mobile communication network and an IP network, the mobile communication network carries out a line connection control based on the common channel signaling system; the IP network establishing a communication path by carrying out a line connection control applying a common channel signaling system to the IP network thereby effecting a telephone communication.
1. A communication system with an IP network, wherein:
said IP network includes an internal networks A and B and plural network node unit, a terminal T 1 is connected to a network node unit N 1 via a communication line L 1 , a terminal T 2 is connected to a network node unit N 2 via a communication line L 2 , said network node unit N 1 connects to said network A with an internal line, and said network A connects to said network node unit N 2 with another internal line, said network node unit N 1 connects to said network B with an internal line, and said network B connects to said network node unit N 2 with another internal line,
when an external IP packet inputs to a network node unit from a logical terminal LP,
an address input condition inspection whether a pair of a discrimination information to discriminate said logical terminal LP and a destination external IP address in said external IP packet is included at a communication record R in said network node unit or not is carried out,
said network node unit N 1 includes communication records R 1 A and R 1 B, a port control record P 1 A is given to said communication record R 1 A, and a port control record P 1 B is given to said communication record R 1 B,
said network node unit N 2 includes communication records R 2 A and R 2 B, said communication records R 1 A and R 2 A define a communication path P 12 A for transferring an internal IP packet between said network node unit N 1 and N 2 , and said communication path P 12 A is included in said internal network A,
said communication records R 1 B and R 2 B define a communication path P 12 B for transferring an internal IP packet between said network node unit N 1 and N 2 , and said communication path P 12 B is included in said internal network B,
an external IP packet A being an source port number P 1 a and a destination port number P 2 a is sent from said terminal T 1 , said external IP packet A is transferred in said communication line L 1 and then inputs to said network node unit N 1 , and said external IP packet A is inspected whether an address input condition of said communication record R 1 A or R 1 B is satisfied or not,
when said address input condition of said communication record R 1 A is satisfied, an inspection whether port numbers P 1 a and P 2 a in said external IP packet A satisfy a port condition defined by said port control record P 1 A is carried out,
when said port numbers P 1 a and P 2 a satisfy said port condition, said external IP packet A is IP-capsulated and becomes to an internal IP packet A,
said internal IP packet A is transferred in said communication path P 12 A and then reaches at said network node unit N 2 , said external IP packet A is restored from said internal IP packet A by using said communication record R 2 A at said network node unit N 2 , and said restored external IP packet A is sent to said terminal T 2 via said communication line L 2 ,
an external IP packet B being an source port number P 1 b and a destination port number P 2 b is sent from said terminal T 1 , said external IP packet B inputs to said network node unit N 1 , and said external IP packet B is inspected whether an address input condition of said communication record R 1 A or R 1 B is satisfied or not,
when said address input condition of said communication record R 1 B is satisfied, an inspection whether port numbers P 1 b and P 2 b in said external IP packet B satisfy a port condition defined by said port control record P 1 B is carried out,
when said port numbers P 1 b and P 2 b satisfy said port condition, said external IP packet B is IP-capsulated and becomes to an internal IP packet B, and
said internal IP packet B is transferred in said communication path P 12 B and then reaches at said network node unit N 2 , said external IP packet B is restored from said internal IP packet B by using said communication record R 2 B at said network node unit N 2 , and said restored external IP packet B is sent to said terminal T 2 via said communication line L 2 .
2. A communication system with an IP network according to claim 1 , wherein:
said internal network A is subjected to a telephone voice communication of which internal IP packet transferring delay time is small, and said internal network B is subjected to a large data transferring network of which communication cost is small.
3. A communication system with an IP network, wherein: said IP network includes plural network node units, a terminal T 1 is connected to a network node unit N 1 , at a logical terminal LPB 1 , via a communication line L 1 , a terminal T 2 is connected to a network node unit N 2 , at a logical terminal LPB 2 , via a communication line L 2 ,
said network node unit N 1 includes an unit control table H 1 , said network node unit N 2 includes an unit control table H 2 , and plural communication records are set at said unit control tables H 1 and H 2 and are erasable,
when an external IP packet inputs to a network node unit from a logical terminal LP, an address input condition inspection whether a pair of a discrimination information to discriminate said logical terminal LP and a destination external IP address in said external IP packet is included at a communication record R in said network node unit or not is carried out,
said terminal T 1 sends to said IP network an external IP packet requesting to be able to communicate between said terminals T 1 and T 2 across said IP network, and said IP network at least sends to said terminal T 2 a communication request from said terminal T 1 ,
said IP network sets both a communication record R 12 and a port control record PT 1 at said unit control table H 1 , said communication record R 12 includes an information for discriminating both said logical terminal LPB 1 and LPB 2 , and said IP network sets a communication record R 21 at said unit control table H 2 , said communication record R 21 including an information for discriminating both said logical terminal LPB 2 and LPB 1 , said communication record R 12 and R 21 define a communication path P 12 between said logical terminals LPB 1 and LPB 2 ,
said terminal T 1 sends to said network node unit N 1 an external IP packet GP 1 including a voice or a data via said communication line L 1 ,
said external IP packet GP 1 is input into said network node unit N 1 , at said logical terminal LPB 1 , and said external IP packet GP 1 is inspected at said network node unit N 1 whether an address input condition of said communication record R 12 is satisfied or not,
a destination port number of said external IP packet GP 1 is compared with a transmittance permission port number of said port control record PT 1 ,
said external IP packet GP 1 selected by said comparison is IP-capsulated and becomes to an internal IP packet NP 1 , said internal IP packet NP 1 is transferred in said communication path P 12 , said external IP packet GP 1 is restored from said internal IP packet NP 1 at said network node unit N 2 by using said communication record R 21 , and said restored external IP packet GP 1 reaches at said terminal T 2 via said communication line L 2 , and
when a communication between said terminal T 1 and T 2 comes to an end, said IP network deletes said communication records R 12 and R 21 .
4. A communication system with an IP network according to claim 3 , wherein:
a function to compare a destination port number of said external IP packet GP 1 with a transmittance permission destination port number included in said port control record PT 1 is carried out by using a port filter function circuit or a port filter function program module.
5. A communication system with an IP network, wherein:
said IP network includes plural network node units, a terminal T 1 is connected to a network node unit N 1 , at a logical terminal LPB 1 , via a communication line L 1 , a terminal T 2 is connected to a network node unit N 2 , at a logical terminal LPB 2 , via a communication line L 2 ,
said network node unit N 1 includes an unit control table H 1 , said network node unit N 2 includes an unit control table H 2 , and plural communication records are set at said unit control tables H 1 and H 2 and are erasable,
when an external IP packet inputs to a network node unit from a logical terminal LP, an address input condition inspection whether a pair of a discrimination information to discriminate said logical terminal LP and a destination external IP address in said external IP packet is included at a communication record R in said network node unit or not is carried out,
said terminal T 1 sends to said IP network an external IP packet requesting to be able to communicate between said terminals T 1 and T 2 across said IP network, and said IP network at least sends to said terminal T 2 a communication request from said terminal T 1 ,
said IP network sets both a communication record R 12 at said unit control table H 1 , said communication record R 12 includes an information for discriminating both said logical terminal LPB 1 and LPB 2 , and said IP network sets both a communication record R 21 and a port control record PT 2 at said unit control table H 2 , said communication record R 21 includes an information for discriminating both said logical terminal LPB 2 and LPB 1 ,
said communication record R 12 and R 21 define a communication path P 12 between said logical terminals LPB 1 and LPB 2 ,
said terminal T 1 sends to said network node unit N 1 an external IP packet GP 1 including a voice or a data via said communication line L 1 ,
said external IP packet GP 1 is input into said network node unit N 1 , at said logical terminal LPB 1 , and said external IP packet GP 1 is inspected, at said network node unit N 1 , whether an address input condition of said communication record R 12 is satisfied or not,
said external IP packet GP 1 selected by said comparison is IP-capsulated and becomes to an internal IP packet NP 1 , said internal IP packet NP 1 is transferred in said communication path P 12 , and
a destination port number of said external IP packet GP 1 in said internal IP packet NP 1 is compared with a receipt permission destination port number of said port control record PT 2 at said network node unit N 2 , said internal IP packet NP 1 selected by said comparison is IP-decapsulated and then said external IP packet GP 1 is restored, and said restored external IP packet GP 1 is transferred to said terminal T 2 , and when a communication between said terminal T 1 and T 2 comes to an end, said IP network deletes said communication records R 12 and R 21 .