US 7,499,448 B2
Method for data exchange between network elements in networks with different address ranges
Oliver Veits, Dachau (Germany)
Assigned to Siemens Aktiengesellschaft, Munich (Germany)
Appl. No. 10/554,159
PCT Filed Mar. 05, 2004, PCT No. PCT/EP2004/002264
§ 371(c)(1), (2), (4) Date Oct. 21, 2005,
PCT Pub. No. WO2004/100498, PCT Pub. Date Nov. 18, 2004.
Claims priority of application No. 103 21 227 (DE), filed on May 12, 2003.
Prior Publication US 2006/0227769 A1, Oct. 12, 2006
Int. Cl. H04L 12/56 (2006.01)
U.S. Cl. 370—389  [709/245] 13 Claims
OG exemplary drawing
 
1. A method for data exchange between network elements, wherein
a first network element is arranged in a first network domain with an address valid in the first network domain, wherein
a second network element is arranged in a second network domain with an address valid in the second network domain, wherein
a network node device is arranged between the network domains for forwarding a data packet to be sent by the first network element to the second network element, wherein
the data packet comprises a characterizing part and a data part, wherein
a destination address characterizing a receiving network element in the characterizing part of the data packet is translated under the control of the network node device into a destination address valid in the second network domain, the method comprising an address discovery comprising:
sending a message by the first network element to the second network element arranged in the second network domain with a destination address of the second network element that is contained in the data part and is valid in the first network domain;
receiving the message by the second network element and storing the destination address of the second network element valid in the first network domain;
sending a response message by the second network element to the first network element with a destination address of the first network element that is contained in the data part and is valid in the second network domain; and
receiving the response message by the first network element and storing the destination address of the first network element valid in the second network domain,
the method further comprising entering into the data part by the first network element a source address of the first network element valid in the second network domain.