Network intermediate apparatus and method for ubiquitous network and ubiquitous network system using the intermediary apparatus

Abstract

Discloses is an ubiquitous network intermediate apparatus and intermediate method that supports various internet services in order that wired terminals can connect to the network without an additional network setting. An ubiquitous network intermediate apparatus according to the present invention comprises a terminal access device outputting a packet received from a terminal according to a source IP address of the packet to a preset virtual path, and outputting a response packet received through the virtual path to the terminal; and a home access device outputting the packet received from the terminal access device through the virtual path to a home router, and transmitting the response packet received from the home router to the terminal access device through the virtual path according to a destination IP address.

1 . An ubiquitous network intermediate apparatus comprising:
 a terminal access device outputting a packet received from a terminal to a preset virtual path according to a source IP address of the packet, and outputting a response packet received through the virtual path to the terminal; and   a home access device outputting the packet received from the terminal access device through the virtual path to a home router, and transmitting the response packet received from the home router to the terminal access device through the virtual path according to a destination IP address of the response packet.   
   
   
       2 . The ubiquitous network intermediate apparatus of  claim 1 , wherein the terminal access device includes:
 a first network look up table that stores a connection information between the terminal access device and the virtual path by an IP subnet that the home router manages; and   a first access look up table that temporarily records the connection information with the terminal for the packet transmitted in the packet transmission.   
   
   
       3 . The ubiquitous network intermediate apparatus of  claim 2 , wherein the terminal access device, for the packet received from the terminal, outputs the packet to the corresponding virtual path after seeking out the virtual path corresponding to the IP subnet to which the source IP address belongs and a port connected to the virtual path in the first network look up table, and matches the information of port in which the packet is received with the source IP address to temporarily record the matched data in the first access look up table. 
   
   
       4 . The ubiquitous network intermediate apparatus of  claim 3 , wherein the terminal access device, for the response packet received from the home access device, seeks out the port corresponding to the destination IP address of the response packet in the first access look up table, and outputs the response packet to the corresponding port. 
   
   
       5 . The ubiquitous network intermediate apparatus of  claim 1 , wherein the terminal access device comprises:
 a second access look up table that stores the connection information between the home access device and the home router based on the virtual path; and   a second network look up table that temporarily records the source IP of the packet received from the terminal access device and the connection information for the virtual path.   
   
   
       6 . The ubiquitous network intermediate apparatus of  claim 5 , wherein the terminal access device, for the packet received through the virtual path, seeks out the port information corresponding to the virtual path in the second access look up table, and outputs the packet to the corresponding port, and matches the virtual path for the packet and the information of port connected to the virtual path with the source IP address of the packet to temporarily record the matched data in the second network lookup table. 
   
   
       7 . The ubiquitous network intermediate apparatus of  claim 6 , wherein the terminal access device, for the response packet received from the home router, outputs the response packet to the virtual path after seeking out the virtual path corresponding to the destination IP address of the response packet and the information of port connected to the virtual path in the second network look up table. 
   
   
       8 . An ubiquitous network system comprising:
 one or more home routers that perform a routing in order that terminals which are connected to an internet network are able to communicate with a service server on the internet network; and   a network intermediate apparatus that transmits a packet received from the terminal to the corresponding home router by classifying the packet according to a source IP address of the packet, and transmits a response packet received from the home router to the corresponding terminal by classifying the response packet according to a destination IP address of the response packet.   
   
   
       9 . The ubiquitous network system of  claim 8 , wherein the home router performs the routing for the terminals having an IP address belonging to an IP subnet which is managed by the home router itself, by managing the terminals by the preset IP subnet. 
   
   
       10 . The ubiquitous network system of  claim 9 , wherein the network intermediate apparatus forms a virtual path by the IP subnet, and transmits the packet from the terminal and the response packet from the home router through the virtual path. 
   
   
       11 . The ubiquitous network system of  claim 10 , wherein the network intermediate apparatus transmits the packet from the terminal to the home router by using the connection information among the terminal, the virtual path and the home router, and transmits the response packet which is received from the home router to the terminal through the virtual path in which the packet having the source IP address which is the destination IP address of the response packet is transmitted. 
   
   
       12 . The ubiquitous network system of  claim 11 , wherein the network intermediate apparatus comprises:
 a terminal access device outputting a packet received from the terminal to the virtual path after classifying it according to the source IP address of the packet, and outputting the response packet received through the virtual path to the terminal; and   a home access device outputting the packet received from the terminal access device through the virtual path to a home router, and transmitting the response packet received from the home router to the terminal access device through the virtual path after classifying it according to a destination IP address.   
   
   
       13 . The ubiquitous network system of  claim 12 , wherein the terminal access device comprises:
 a first network look up table that stores an connection information between the terminal access device and the virtual path based on the source IP address; and   a first access look up table that temporarily records the connection information with the terminal for the packet transmitted in the packet transmission.   
   
   
       14 . The ubiquitous network system of  claim 13 , wherein the terminal access device, for the packet received from the terminal, outputs the packet to a corresponding virtual path after seeking out the virtual path corresponding to the source IP address of the packet and a port information connected to the virtual path in the first network look up table, and matches the information of port in which the packet is received with the source IP address to record them in the first access look up table. 
   
   
       15 . The ubiquitous network system of  claim 14 , wherein the terminal access device, for the response packet received from the home access device, seeks out the port corresponding to the destination IP address of the response packet in the first access look up table, and outputs the response packet to the corresponding port. 
   
   
       16 . The ubiquitous network system of  claim 12 , wherein the home access device comprises:
 a second access look up table that stores the connection information between the home access device and the home router based on the virtual path; and   a second network look up table that temporarily records the connection information with the virtual path of the packet received from the terminal access device.   
   
   
       17 . The ubiquitous network system of  claim 16 , wherein the home access device, for the packet received through the virtual path, seeks out the port information corresponding to the virtual path in the second access look up table, and outputs the packet to the corresponding port, and matches the virtual path for the packet and the information of port connected to the virtual path with the source IP address of the packet to record the matched data in the second network lookup table. 
   
   
       18 . The ubiquitous network system of  claim 16 , wherein the home access device, for the response packet received from the home router, outputs the response packet to the virtual path after seeking out the virtual path corresponding to the destination IP address of the response packet and the information of port connected to the virtual path at the second network look up table. 
   
   
       19 . An ubiquitous network intermediate method comprising:
 a first step of classifying a received packet according to the source IP address of the packet, transmitting the packet to a corresponding home router and storing a connection information for a transmission path of the packet based on a source IP address, in receiving the packet from a terminal; and   a second step of transmitting a response packet to the terminal according to a destination IP address of the response packet and the connection information, in receiving the response packet corresponding to the packet from the home router.   
   
   
       20 . The ubiquitous network intermediate method of  claim 19 , wherein the packet from the terminal and the response packet from the home router are transmitted through the virtual path formed between the terminal and the home router by an IP subnet that the home router manages. 
   
   
       21 . The ubiquitous network intermediate method of  claim 20 , wherein, in the first step, the packet is transmitted to the home router through the virtual path corresponding to the IP subnet to which the source IP address of the packet belongs, while a port in which the packet is received from the terminal and an information for the virtual path in which the packet is transmitted are matched with the source IP to record. 
   
   
       22 . The ubiquitous network intermediate method of  claim 21 , wherein, in the second step, the response packet is transmitted to the terminal through the virtual path and the port corresponding to a searched source IP address after searching the source IP address coinciding with the destination IP address of the response packet in the connection information.