Method for transmitting data packets containing private internet addresses

• US 20030105878A1
• Filed: 10/28/2002
• Published: 06/05/2003
• Est. Priority Date: 12/22/1999
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Ottensmeyer, Joerg, Petri, Bernhard
• Application Number:
  US10/168,400
• Publication Number:
  US 20030105878A1
• Time in Patent Office: Days
• US Class Current: 709/245
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04W 8/087 for preserving data network PoA address despite hand-offs
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]

Abstract

The invention relates to a method for transmitting data packets containing private Internet addresses. In prior art, the transmission of data packets containing private IP addresses is problematic, as said addresses are not unequivocal on a world-wide basis. According to the invention, at least one field is provided in the information block of an IP packet which can accommodate an identification that indicates a private network which is unique world-wide. This identification determines the interpretation of the subsequent (private) IP addresses.

Claims

1. A method for transmitting data packets with private Internet addresses, with a multiplicity of private networks (P₁ . . . P_n) which are networked to one another via public networks or other private networks, private and public networks each comprising a further multiplicity of subscribers which can be addressed via public or private IP addresses and which exchange information with one another in the form of IP packets, a destination address (AIPH) being entered into the packet header of an IP packet, and the information which is to be exchanged being entered into the information part of an IP packet,

characterized

in that at least one field (OI, PNI) in which an identification which characterizes a private network (P₁ . . . P_n) and is unique worldwide is entered is provided in the information part of an IP packet.

2. The method as claimed in claim 1,

characterized

in that the identification which characterizes the private network (P₁ . . . P_n) and is unique worldwide is composed of an identification number for an organization (OI), and of an address space identifier (PNI) which is to be administered by this organization.

3. The method as claimed in claim 1, 2,

characterized

in that the identification which characterizes the private network (P₁ . . . P_n) and is unique worldwide is followed by at least one private IP address.

4. The method as claimed in one of the preceding claims,

characterized

in that some of the subscribers are embodied as mobile Internet subscribers.

5. The method as claimed in one of the preceding claims,

characterized

in that the at least one field contains information (SEL) about whether and how the included identification which characterizes the private network (P₁ . . . P_n) and is unique worldwide relates to the transmitter'"'"'s address or destination address or both.