公开(公告)号：US09832799B2

公开(公告)日：2017-11-28

申请号：US14769061

申请日：2014-02-18

Applicant: KYOCERA CORPORATION

Inventor： Kugo Morita ,  Akinori Iwabuchi ,  Tohru Sunaga

IPC: H04W76/02 ,  H04W72/04 ,  H04W4/24 ,  H04W8/00 ,  H04W92/18 ,  H04W88/04

CPC classification number: H04W76/14 ,  H04W4/24 ,  H04W8/005 ,  H04W72/04 ,  H04W88/04 ,  H04W92/18

Abstract: A mobile communication system according to the embodiment supports cellular communication in which a data path passes through a network and D2D communication that is direct device-to-device communication in which a data path does not pass through the network. A frequency division multiplexing scheme is applied to the cellular communication and a code division multiplexing scheme is applied to the D2D communication. The network assigns a spread code having orthogonality to a user terminal in response to a request from the user terminal. The user terminal performs the D2D communication by using the spread code assigned by the network.

公开(公告)号：US10122424B2

公开(公告)日：2018-11-06

申请号：US15564444

申请日：2016-04-07

Applicant: KYOCERA CORPORATION

Inventor： Fangwei Tong ,  Atsuhisa Inakoshi ,  Kugo Morita ,  Masato Fujishiro ,  Chiharu Yamazaki ,  Akinori Iwabuchi ,  Tohru Sunaga

IPC: H04B7/06 ,  H04W72/04 ,  H04B7/0408 ,  H04W16/28 ,  H04B7/0456 ,  H04L5/00

Abstract: A mobile communication system is a mobile communication system that performs communication between a base station and a user terminal. When a directivity is formed to transmit a radio signal, the base station transmits a first radio signal including identification information to identify the formed directivity and a reference signal. The user terminal receives the first radio signal and transmits a second radio signal including quality information when receiving the reference signal and the identification information. The base station receives the second radio signal and determines the directivity to be formed based on the identification information and the quality information.