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.

Date of Patent:
Aug. 24, 2021

Filed:

Apr. 19, 2019
Applicant:

Nippon Telegraph and Telephone Corporation, Tokyo, JP;

Inventors:

Takeaki Nakajima, Tokyo, JP;

Koji Tanida, Tokyo, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 29/06 (2006.01); H04L 29/08 (2006.01); H04L 12/26 (2006.01);
U.S. Cl.
CPC ...
H04L 65/608 (2013.01); H04L 43/106 (2013.01); H04L 43/18 (2013.01); H04L 65/1083 (2013.01); H04L 67/303 (2013.01);
Abstract

An RTP disconnection detection function is operated properly even when networks having different timer values are connected. A first monitoring timerconfigured to count a first timer value representing a predetermined time from when a callee transmission packet transmitted from a callee terminalis interrupted, a second monitoring timerconfigured to count a second timer value representing a predetermined time from when a caller transmission packet transmitted from a caller terminalis interrupted, a first relay interpolation unitconfigured to relay the callee transmission packet to the caller terminal, and while the first monitoring timertimes out and the second monitoring timerperforms counting, generate a callee interpolation packet for interpolating the callee transmission packet and transmit the generated callee interpolation packet to the caller terminal, and a second relay interpolation unitconfigured to relay the caller transmission packet to the callee terminal, and while the second monitoring timertimes out and the first monitoring timerperforms counting, generate a caller interpolation packet for interpolating the caller transmission packet and transmit the generated caller interpolation packet to the callee terminal, are included.


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