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Patent Searching and Data


Title:
SIP PROXY SERVER, COMMUNICATION METHOD AND SIP PROXY PROGRAM
Document Type and Number:
WIPO Patent Application WO/2019/198682
Kind Code:
A1
Abstract:
An SIP proxy server 1 is provided with a forking termination unit 21. When receiving an Initial INVITE request message from a caller network 6, the forking termination unit 21 transmits the Initial INVITE request message to a called network 7, and when receiving an 18X response message first from the called network, transmits the first received 18X response message to the caller network 6. The forking termination unit 21 establishes an Early dialog#0 with the caller network 6, and establishes an Early Dialog#1 corresponding to a called terminal 3 that is a transmission source of the first received 18X response. When receiving the 18X response message second from the called network 7, the forking termination unit 21 establishes an Early Dialog#2 corresponding to a called terminal 3 that is a transmission source of the second received 18X response.

Inventors:
ARAI Kenjiro (9-11 Midori-cho 3-chome, Musashino-sh, Tokyo 85, 〒1808585, JP)
OGAWA Muneaki (9-11 Midori-cho 3-chome, Musashino-sh, Tokyo 85, 〒1808585, JP)
Application Number:
JP2019/015369
Publication Date:
October 17, 2019
Filing Date:
April 09, 2019
Export Citation:
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Assignee:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION (5-1 Otemachi 1-chome, Chiyoda-ku Tokyo, 16, 〒1008116, JP)
International Classes:
H04M3/42; H04L12/70; H04M3/00
Domestic Patent References:
WO2016104622A12016-06-30
Foreign References:
US20130304930A12013-11-14
JP2017153028A2017-08-31
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (Toranomon Kotohira Tower, 2-8 Toranomon 1-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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