METHOD FOR THE ESTABLISHING OF PEER-TO-PEER MULTIMEDIA SESSIONS IN A COMMUNICATION SYSTEM

• US 20100312901A1
• Filed: 05/09/2008
• Published: 12/09/2010
• Est. Priority Date: 05/11/2007
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Rantapuska, Olli Antero, Kokkonen, Esko Mikael, Porio, Jyrki Tauno Johannes, Noyranen, Janne Esa Petteri, Kokkinen, Heikki Juhani, Matuszewski, Marcin Wieslaw
• Granted Patent: US 8,725,883 B2
• Time in Patent Office: Days
• US Class Current: 709/228
• CPC Class Codes: H04L 61/2567 for reachability, e.g. inquiring the address of a correspondent behind a NAT server
• CPC Class Codes: H04L 61/2582 through control of the NAT server, e.g. using universal plug and play [UPnP]
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 67/104 Peer-to-peer [P2P] networks
• CPC Class Codes: H04L 67/1065 Discovery involving distributed pre-established resource-based relationships among peers, e.g. based on distributed hash tables [DHT] pre-configuration of logical or physical connections H04L67/1053

Abstract

The invention relates to a method where a first address (121) from a first network (185) is obtained to a mobile node (180). Network address translation information is received from a network node (140) to the mobile node (180), the network node (140) being connected to a second network (150). An address mapping is indicated between the first address (121) and a second address (101) to the network node (140), the second address (101) being associated with the second network (150). A session establishment request is obtained. The request comprises instances of the first addresses (121) and third addresses (120). The first addresses (121) are replaced with the second addresses (101) in the request. An address mapping is indicated between the third address (120) and a fourth address (100) to the first network node (140). The session establishment request is sent to a remote network node (190) from the mobile node (180).

Claims

1-26. -26. (canceled)

27. A method comprising:

obtaining a first address from a first network to a network protocol entity within a mobile node, said first address comprising an internet protocol address and a port number;

receiving network address translation information regarding a first network and a second network from a first network node to a session establishment proxy entity within said mobile node;

configuring an address mapping between said first address and a second address to said first network node from said session establishment proxy entity, said second address being associated with said second network and said second address comprising an internet protocol address and a port number;

receiving a session establishment request at said session establishment proxy entity from said session establishment entity, said request comprising at least one first field comprising said first address and at least one second field comprising a third address, said third address comprising an internet protocol address and a port number;

replacing said first address with said second address in said at least one first field by said session establishment proxy entity;

configuring an address mapping between said third address and a fourth address to said first network node from said session establishment proxy entity, said fourth address being associated with said second network and said fourth address comprising an internet protocol address and a port number; and

initiating a sending of said session establishment request to a remote network node from said session establishment proxy entity within said mobile node.

28. The method according to claim 27, the method further comprising:

updating said second address in a distributed hash table to be associated with a logical name.

29. The method according to claim 27, the method further comprising:

obtaining a peer address from a distributed hash table.

30. The method according to claim 27, wherein the method further comprises:

inserting at least one header to said session establishment request, said headers specifying said second address.

31. The method according to claim 27, the method further comprising:

receiving said fourth address from said first network node to said mobile node.

32. The method according to claim 27, wherein said first node comprises a network address translation enabled router.

33. The method according to claim 27, wherein said indication of said address mapping uses the universal plug-and-play protocol.

34. The method according to claim 27, wherein said determining of said network address translation information uses at least one external server within said second network.

35. The method according to claim 27, wherein said network address translation information comprises an indication of a type comprising at least full cone, restricted cone and port restricted cone.

36. A system, comprising:

an electronic device configured to obtain a first address from a first network to a network protocol entity within said electronic device, said first address comprising an internet protocol address and a port number, to receive network address translation information regarding a first network and a second network from a first network node to a session establishment proxy entity within said electronic device, to request forming an address mapping between said first address and a second address in said first network node from said session establishment proxy entity, said second address being associated with said second network and said second address comprising an internet protocol address and a port number, to receive a session establishment request at said session establishment proxy entity from said session establishment entity, said request comprising at least one first field comprising said first address and at least one second field comprising a third address, said third address comprising an internet protocol address and a port number, to replace said first address with said second address in said at least one first field by said session establishment proxy entity, to request forming an address mapping between said third address and a fourth address in said first network node from said session establishment proxy entity, said fourth address being associated with said second network and said fourth address comprising an internet protocol address and a port number, and to initiate a sending of said session establishment request to a remote network node from said session establishment proxy entity within said electronic device; and

said first network node configured to send network address translation information from a first network node, to receive a request for an address mapping between said first address and said second address, to store said address mapping between said first address and said second address, to receive a request for an address mapping between said third address and said fourth address, and to store said address mapping between said third address and said fourth address.

37. The system according to claim 36, the system further comprising:

the electronic device configured to update said second address in a distributed hash table to be associated with a logical name.

38. The system according to claim 36, the system further comprising:

the electronic device configured to obtaining a peer address from a distributed hash table.

39. The system according to claim 36, the system further comprising:

the electronic device configured to inserting at least one header to said session establishment request, said headers specifying said second address.

40. The system according to claim 36, the system further comprising:

said electronic device configured to receive said fourth address; and

said first network node configured to allocate said fourth address and to send said fourth address to said electronic device.

41. The system according to claim 36, wherein said first node comprises a network address translation enabled router.

42. The system according to claim 36, the system further comprising:

said electronic device configured to indicate said address mapping with a universal plug-and-play protocol message.

43. The system according to claim 36, the system further comprising:

said electronic device configured to send at least one request message to at least one external server within said second network in order to determine said network address translation information;

said at least one external server configured to send at least one response message to said electronic device; and

said first network node configured to relay said at least one request message and said at least one response message and to translate addresses in said at least one request message and said at least one response message with at least one network address translation rule.

44. The system according to claim 36, wherein said network address translation information comprises an indication of a type comprising at least full cone, restricted cone and port restricted cone.

45. An electronic device, comprising:

a network protocol entity configured to obtain a first address, said first address comprising an internet protocol address and a port number;

a session establishment entity; and

a session establishment proxy entity configured to obtain a first address from a first network, to receive network address translation information regarding a first network and a second network from a first network node, to configure an address mapping between said first address and a second address to said first network node, said second address being associated with said second network and said second address comprising an internet protocol address and a port number, to receive a session establishment request from said session establishment entity, said request comprising at least one first field comprising said first address and at least one second field comprising a third address, said third address comprising an internet protocol address and a port number, to replace said first address with said second address in said at least one first field, to configure an address mapping between said third address and a fourth address to said first network node, said fourth address being associated with said second network and said fourth address comprising an internet protocol address and a port number, and to initiate a sending of said session establishment request to a remote network node.

46. A computer program embodied on a computer readable medium, the computer program comprising code for controlling a processor to execute a method comprising:

obtaining a first address from a first network to a network protocol entity within a mobile node, said first address comprising an internet protocol address and a port number;

receiving network address translation information regarding a first network and a second network from a first network node to a session establishment proxy entity within said mobile node;

configuring an address mapping between said first address and a second address to said first network node from said session establishment proxy entity, said second address being associated with said second network and said second address comprising an internet protocol address and a port number;

receiving a session establishment request at said session establishment proxy entity from said session establishment entity, said request comprising at least one first field comprising said first address and at least one second field comprising a third address, said third address comprising an Internet protocol address and a port number;

replacing said first address with said second address in said at least one first field by said session establishment proxy entity;

configuring an address mapping between said third address and a fourth address to said first network node from said session establishment proxy entity, said fourth address being associated with said second network and said fourth address comprising an internet protocol address and a port number; and

initiating a sending of said session establishment request to a remote network node from said session establishment proxy entity within said mobile node.