公开(公告)号：US11895622B2

公开(公告)日：2024-02-06

申请号：US16935973

申请日：2020-07-22

Applicant: NTT DOCOMO, INC.

Inventor： Shimpei Yasukawa ,  Satoshi Nagata ,  Qun Zhao ,  Yongbo Zeng ,  Yongsheng Zhang

IPC: H04W72/02 ,  H04W92/18 ,  H04J13/18 ,  H04L5/00 ,  H04W72/21

CPC classification number: H04W72/02 ,  H04J13/18 ,  H04L5/0044 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/0094 ,  H04W72/21 ,  H04W92/18

Abstract: A user apparatus in a mobile communication system includes an allocation means that divides a message that includes control information and data into a plurality of partial messages, and allocates resources included in one or more resource pools to the plurality of partial messages; and a transmission means that transmits the plurality of partial messages using the resources allocated by the allocation means.

公开(公告)号：US10389564B2

公开(公告)日：2019-08-20

申请号：US15032343

申请日：2014-10-16

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Yongbo Zeng ,  Qun Zhao ,  Yongsheng Zhang

IPC: H04L27/26 ,  H04W8/00 ,  H04W72/04

Abstract: The present invention is designed so that, in a radio communication system in which inter-terminal communication is carried out, the impact of inter-symbol interference due to the delay of inter-terminal discovery signals is reduced. The radio communication method of the present invention is used in a radio communication system in which each user terminal transmits the inter-terminal discovery signal in a transmission duration of a predetermined period. A radio base station determines the cyclic prefix (CP) length configuration for use in the transmission duration, and transmits cyclic prefix (CP) length configuration information which represents the CP length configuration. Each user terminal transmits the inter-terminal discovery signal based on the CP length configuration information.

公开(公告)号：US20180234888A1

公开(公告)日：2018-08-16

申请号：US15751196

申请日：2016-08-12

Applicant: NTT DOCOMO, INC.

Inventor： Shimpei Yasukawa ,  Satoshi Nagata ,  Qun Zhao ,  Yongbo Zeng ,  Yongsheng Zhang

IPC: H04W28/26 ,  H04W4/40 ,  H04W72/02 ,  H04W72/04

CPC classification number: H04W4/40 ,  H04W28/26 ,  H04W72/02 ,  H04W72/0453 ,  H04W92/18

Abstract: User equipment of a mobile communication system supporting D2D includes a reservation unit that transmits reservation information including reservation resource identification information corresponding to a reservation resource used for data transmission by the user equipment; and a transmitter that transmits data using the reservation resource corresponding to the reservation resource identification information.

公开(公告)号：US20180098369A1

公开(公告)日：2018-04-05

申请号：US15564075

申请日：2016-03-25

Applicant: NTT DOCOMO, INC.

Inventor： Shimpei Yasukawa ,  Satoshi Nagata ,  Yongbo Zeng ,  Qun Zhao ,  Yongsheng Zhang

IPC: H04W76/02 ,  H04W92/18 ,  H04W48/10 ,  H04W52/28 ,  H04W72/10

Abstract: A user apparatus is provided. The user apparatus is used in a mobile communication system in which D2D communications are supported. The user apparatus includes an obtaining unit configured to obtain from a base station control rules including predetermined communication methods applied to corresponding user apparatus types; a determination unit configured to determine which of the predetermined communication methods is to be applied to the user apparatus by comparing a type of the user apparatus and the control rules; and a transmission unit configured to transmit a D2D signal based on the determined predetermined communication method.

公开(公告)号：US09781584B2

公开(公告)日：2017-10-03

申请号：US14761756

申请日：2014-02-04

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Qun Zhao ,  Yongbo Zeng ,  Yongsheng Zhang

IPC: H04W8/00 ,  H04W52/02 ,  H04W24/02 ,  H04W64/00 ,  G01S11/06 ,  H04W88/04 ,  H04W88/08

CPC classification number: H04W52/38 ,  G01S11/06 ,  H04W8/00 ,  H04W8/005 ,  H04W24/02 ,  H04W52/0261 ,  H04W52/28 ,  H04W64/00 ,  H04W88/04 ,  H04W88/08 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/1264

Abstract: A distance estimation method for, by causing a first user apparatus to receive a discovery signal from a second user apparatus, estimating a distance between the first user apparatus and the second user apparatus is provided. The distance estimation method includes a step of receiving from the second user apparatus the discovery signal including transmission power information of the discovery signal, a step of obtaining the transmission power information from the discovery signal, and a step of estimating the distance between the first user apparatus and the second user apparatus from receive power information of the discovery signal at the first user apparatus and the transmission power information.

公开(公告)号：US20170164303A1

公开(公告)日：2017-06-08

申请号：US15433035

申请日：2017-02-15

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Qun Zhao ,  Yongbo Zeng ,  Yongsheng Zhang

IPC: H04W52/38 ,  H04W52/28 ,  H04W8/00

CPC classification number: H04W52/38 ,  G01S11/06 ,  H04W8/00 ,  H04W8/005 ,  H04W24/02 ,  H04W52/0261 ,  H04W52/28 ,  H04W64/00 ,  H04W88/04 ,  H04W88/08 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/1264

Abstract: A transmission power control method in a mobile communication system including a user apparatus and a base station is provided. The method enables the base station to control transmission power of a discovery signal of the user apparatus. The method includes estimating a number of the user apparatuses transmitting discovery signals by monitoring the discovery signals transmitted from the user apparatuses, by referring to power class setting information which associates the number of the user apparatuses transmitting the discover signals with a power class used for determining transmission power information of the discovery signal in the user apparatus, determining the power class associated with the number of the estimate user apparatuses, and transmitting the determined power class to the user apparatus.

公开(公告)号：US20180234994A1

公开(公告)日：2018-08-16

申请号：US15749712

申请日：2016-08-10

Applicant: NTT DOCOMO, INC.

Inventor： Shimpei Yasukawa ,  Satoshi Nagata ,  Qun Zhao ,  Yongbo Zeng ,  Yongsheng Zhang

IPC: H04W72/12 ,  H04W72/02 ,  H04W92/18 ,  H04W72/04

CPC classification number: H04W72/1242 ,  H04L5/0005 ,  H04L5/0053 ,  H04L5/0064 ,  H04W4/70 ,  H04W72/02 ,  H04W72/0406 ,  H04W72/10 ,  H04W76/14 ,  H04W76/45 ,  H04W92/18

Abstract: A user apparatus in a radio communication system that supports a Device to Device (D2D) communication is disclosed. The user apparatus includes a first transmission unit configured to transmit radio resource allocation information, in case of transmitting a Medium Access Control (MAC) Protocol Data Unit (PDU) of high priority, by using a specific subframe that is used for transmitting radio resource allocation information corresponding to a MAC PDU of high priority, from among radio resources allocated to a D2D control channel. A second transmission unit is configured to transmit the MAC PDU via a D2D data channel in accordance with the transmitted radio resource allocation information.

公开(公告)号：US10009828B2

公开(公告)日：2018-06-26

申请号：US15032720

申请日：2014-10-16

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Yongbo Zeng ,  Qun Zhao ,  Yongsheng Zhang

IPC: H04W40/24 ,  H04J11/00 ,  H04L27/10 ,  H04L27/34 ,  H04L29/06 ,  H04L5/00 ,  H04W72/12 ,  H04W8/00 ,  H04W88/06

CPC classification number: H04W40/244 ,  H04J11/00 ,  H04J11/0056 ,  H04L5/0048 ,  H04L5/005 ,  H04L27/10 ,  H04L27/34 ,  H04L69/22 ,  H04W8/005 ,  H04W40/246 ,  H04W72/1215 ,  H04W72/1263 ,  H04W88/06

Abstract: The present invention is designed so that, when a plurality of inter-terminal discovery signals with varying numbers of information bits are used in a radio communication system in which inter-terminal communication is carried out, user terminals can be discovered based on the inter-terminal discovery signals. According to the inter-terminal communication method of the present invention, a user terminal (#1) determines the signal format of a discovery signal based on the number of information bits of the discovery signal,transmits the discovery signal based on the signal format, and also transmits signal format information to represent this signal format. A user terminal (#2) receives the signal format information from the user terminal (#1), and, based on the signal format represented by the signal format information, detects the discovery signal.

公开(公告)号：US20160294595A1

公开(公告)日：2016-10-06

申请号：US15032343

申请日：2014-10-16

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Yongbo Zeng ,  Qun Zhao ,  Yongsheng Zhang

IPC: H04L27/26 ,  H04W72/04 ,  H04W8/00

CPC classification number: H04L27/2607 ,  H04L27/2646 ,  H04W8/005 ,  H04W72/0446

Abstract: The present invention is designed so that, in a radio communication system in which inter-terminal communication is carried out, the impact of inter-symbol interference due to the delay of inter-terminal discovery signals is reduced. The radio communication method of the present invention is used in a radio communication system in which each user terminal transmits the inter-terminal discovery signal in a transmission duration of a predetermined period. A radio base station determines the cyclic prefix (CP) length configuration for use in the transmission duration, and transmits cyclic prefix (CP) length configuration information which represents the CP length configuration. Each user terminal transmits the inter-terminal discovery signal based on the CP length configuration information.

Abstract translation: 本发明的目的在于，在进行终端间通信的无线通信系统中，减少了由于终端间发现信号的延迟引起的符号间干扰的影响。 本发明的无线通信方法用于各个用户终端在规定期间的发送持续时间内发送终端间发现信号的无线通信系统。 无线基站确定在传输持续时间内使用的循环前缀（CP）长度配置，并发送表示CP长度配置的循环前缀（CP）长度配置信息。 每个用户终端根据CP长度配置信息发送终端间发现信号。

公开(公告)号：US20160165559A1

公开(公告)日：2016-06-09

申请号：US14906173

申请日：2014-07-15

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Qun Zhao ,  Yongsheng Zhang ,  Katsutoshi Kusume

IPC: H04W56/00 ,  H04W76/02 ,  H04W72/04 ,  H04W8/00

CPC classification number: H04W56/002 ,  H04W8/005 ,  H04W72/042 ,  H04W76/14 ,  H04W92/18

Abstract: A user apparatus, for use in a radio communication system including a base station forming a cell, configured to receive a discovery signal of device-to-device communication, including: an information reception unit configured to receive, from a base station of a residing cell, a resource range in which a discovery signal can be transmitted in a neighbor cell; and a discovery signal reception unit configured to receive a discovery signal at a time position that is synchronized with the neighbor cell in response to receiving a synchronization signal that is synchronized with the neighbor cell within the resource range received by the information reception unit.

Abstract translation: 一种用于在包括形成小区的基站的无线电通信系统中使用的用户装置，被配置为接收设备到设备通信的发现信号，包括：信息接收单元，被配置为从基站接收驻留的 小区，可以在相邻小区中发送发现信号的资源范围; 以及发现信号接收单元，被配置为响应于在所述信息接收单元接收到的所述资源范围内接收与所述相邻小区同步的同步信号，在与所述相邻小区同步的时间位置处接收发现信号。