The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 15, 2013
Filed:
Mar. 20, 2009
Johan Kolhi, Vaxholm, SE;
Christian Gotare, Getinge, SE;
Tomas Thyni, Jarfalla, SE;
Annikki Welin, Solna, SE;
Johan Kolhi, Vaxholm, SE;
Christian Gotare, Getinge, SE;
Tomas Thyni, Jarfalla, SE;
Annikki Welin, Solna, SE;
Telefonaktiebolaget LM Ericsson, Stockholm, SE;
Abstract
Method and arrangement for communication of data packets between a first device (D) in a first local network (A) and a second device (D) in a second local network (B). where private IP addresses are used for devices present in the first and second local networks. A first gateway () of the first network updates () a local name server record () with a domain name and an IP address of a second gateway () of the second network, each gateway having a local DNS function. When an outgoing DNS request is received () from the first device referring to a hostname of the second device, the IP address of the second gateway is determined () from the local name server record based on a domain name in the hostname. A DNS request is then sent () to the second gateway using the determined IP address, to obtain a current private IP address of the second device in a DNS response () from the second gateway. A DNS response is then forwarded () to the first device, referring to the current private IP address of the second device.