PEER-TO-PEER CONNECTION SYSTEM AND METHOD FOR USE IN MULTI-NETWORK ENVIRONMENT

• US 20120137011A1
• Filed: 11/30/2011
• Published: 05/31/2012
• Est. Priority Date: 11/30/2010
• Status: Active Grant

• Current Assignee: Samsung SDS (China) Co., Ltd. (Samsung Group)
• Original Assignee: Samsung SDS (China) Co., Ltd. (Samsung Group)
• Inventors: YOON, Hee Tae, KIM, Young Kwang
• Granted Patent: US 8,930,546 B2
• Time in Patent Office: Days
• US Class Current: 709/228
• CPC Class Codes: H04L 2101/677 Multiple interfaces, e.g. multihomed nodes
• CPC Class Codes: H04L 61/2575 using address mapping retrieval, e.g. simple traversal of user datagram protocol through session traversal utilities for NAT [STUN]
• CPC Class Codes: H04L 67/104 Peer-to-peer [P2P] networks
• CPC Class Codes: H04L 69/14 Multichannel or multilink protocols

Abstract

Provided are a peer-to-peer (P2P) connection system and method for use in a multi-network environment. The P2P connection system includes a user terminal configured to register connection information for connecting to the user terminal through each of a plurality of connectable networks in a location server; and the location server configured to store the connection information received from the user terminal.

Claims

1. A peer-to-peer (P2P) connection system comprising:

a user terminal configured to register connection information for connecting to the user terminal through a plurality of connectable networks, in a location server; and

the location server configured to store the connection information received from the user terminal.

2. The P2P connection system of claim 1, wherein the location server is configured to store priority information of the connection information.

3. The P2P connection system of claim 2, further comprising:

a Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (STUN) server configured to provide Network Address Translation (NAT) type information to the user terminal of a network currently connected to the user terminal; and

a relay server configured to relay the connection information received from the user terminal to the location server.

4. The P2P connection system of claim 3, wherein the connection information comprises public addresses of the user terminal, private addresses of the user terminal, relay server addresses, the NAT type information, and connection priorities of the plurality of connectable networks.

5. The P2P connection system of claim 4, wherein the user terminal receives the NAT type information of the plurality of connectable networks from the STUN server, and transmits a registration packet comprising the received NAT type information and the private addresses of the user terminal in the plurality of connectable networks, to the relay server.

6. The P2P connection system of claim 5, wherein the relay server receives the registration packet from the user terminal, extracts public addresses of the user terminal from the received registration packet, and transmits the extracted public addresses, the relay server addresses, the private addresses of the user terminal, and the NAT type information, to the location server.

7. A peer-to-peer (P2P) connection system comprising:

a second user terminal configured to request connection information of a plurality of networks connectable to a first user terminal for a P2P connection to the first user terminal; and

a location server configured to provide the connection information to the second user terminal according to the request of the second user terminal,

wherein the second user terminal receives the connection information from the location server, and establishes a connection to the first user terminal through a first network among the plurality of networks.

8. The P2P connection system of claim 7, wherein the second user terminal establishes the connection to the first user terminal through the first network having a highest connection priority among the plurality of networks in the received connection information.

9. The P2P connection system of claim 8, wherein the connection information comprises public addresses of the first user terminal, private addresses of the first user terminal, relay server addresses, NAT type information, and connection priorities of the networks which are connectable to the first user terminal.

10. The P2P connection system of claim 9, wherein when the connection to the first user terminal through the first network is disconnected, the second user terminal reestablishes the connection to the first user terminal using a second network having a next highest connection priority among the plurality of networks in the received connection information.

11. A method of registering connection information by a user terminal connectable to a plurality of networks, comprising:

receiving Network Address Translation (NAT) type information from a Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (STUN) server for a plurality of connectable networks; and

registering connection information of the user terminal comprising the received NAT type information in the location server for the plurality of connectable networks.

12. The method of claim 11, wherein the connection information comprises connection priorities of the plurality of connectable networks.

13. The method of claim 11, wherein the connection information of the user terminal comprises:

a private address of the user terminal, a public address of the user terminal, an address of a relay server, and NAT type information within the connected network.

14. The method of claim 12, wherein registering the connection information further comprises:

transmitting a registration packet comprising the NAT type information received from the STUN server and the private address of the user terminal to the relay server; and

extracting the public address of the user terminal from the registration packet, and transmitting the extracted public address of the user terminal, the address of the relay server, the private address of the user terminal, and the NAT type information to the location server.

20. A computer readable recording medium having instructions recorded thereon to perform the method of claim 11.

15. A method of establishing a peer-to-peer (P2P) connection by a second user terminal to a first user terminal, comprising:

requesting a location server to provide connection information of a plurality of networks connectable to the first user terminal;

receiving the connection information from the location server; and

establishing a connection through a first network among the plurality of networks connectable to the first user terminal according to the connection information received from the location server.

16. The method of claim 15, wherein the connection information comprises connection priorities of the plurality of networks connectable to the first user terminal.

17. The method of claim 16, wherein the connection information further comprises public addresses of the first user terminal, private addresses of the first user terminal, relay server addresses, and NAT type information.

18. The method of claim 16, wherein establishing a connection through the first network among the plurality of networks comprises establishing a connection through the first network having the highest connection priority among the plurality of networks connectable to the first user terminal.

19. The method of claim 18, further comprising, after the connection to the first user terminal through the first network is disconnected:

reestablishing the connection to the first user terminal using a second network having the next highest connection priority among the plurality of networks.

21. A computer readable recording medium having instructions recorded thereon to perform the method of claim 15.