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:
Aug. 09, 2016
Filed:
Nov. 27, 2013
Yamaha Corporation, Hamamatsu-shi, Shizuoka-ken, JP;
Takahiro Hara, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
In a communication system, using source address, source port number, destination address and destination port number, terminals A and B located behind NAT routers A and B, respectively, communicate with each other through the NAT routers A and B. A server SV which is not located behind any NAT routers identifies the NAT router A as a NAT router of a certain type which translates the source port number into a different source port number if the destination port number is changed. The server SV then guesses a port number obtained by adding (or subtracting) a value to (or from) the source port number used for transmission of data from the terminal A through the NAT router A as a port number of the terminal A in a case where the NAT router has been identified as the certain type, and informs the terminal B of the guessed port number.