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:
Dec. 22, 2015
Filed:
Apr. 18, 2013
Ntt Docomo, Inc., Tokyo, JP;
Shin-ichi Isobe, Tokyo, JP;
Katsutoshi Nishida, Tokyo, JP;
NTT DOCOMO, INC., Tokyo, JP;
Abstract
A private branch exchange system capable of enabling radio communication terminals belonging to an extension group to perform device-to-device direct communication (D2D communication) by using a radio access network such as LTE. A private branch exchange serverincludes a transition trigger detection unitconfigured to detect a trigger for a transition to the direct communication, an extension group list retention unitconfigured to retain an extension group list containing an identifier of the radio communication terminal belonging to the extension group, a subgroup selection unitconfigured to select a certain subgroup from the extension group list, and a direct communication command unitconfigured to send permission information on the direct communication and configuration information on a communication environment necessary for the direct communication to the radio communication terminal contained in the subgroup selected by the subgroup selection unit