公开(公告)号：US20160219453A1

公开(公告)日：2016-07-28

申请号：US15024874

申请日：2014-09-04

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Satoshi Nagata ,  Hiroyuki Ishii

IPC: H04W24/10 ,  H04L5/00

CPC classification number: H04W24/10 ,  H04B17/318 ,  H04L5/001 ,  H04L5/0041 ,  H04W28/06 ,  H04W52/346 ,  H04W84/045

Abstract: The present invention is designed to reduce the load of inter-frequency measurements in user terminals in a radio communication system in which a plurality of CCs are used in each small cell within a macro cell. The inter-frequency measurement method of the present invention includes the steps of, from a radio base station forming a macro cell to a user terminal, transmitting the transmission timing information of a detection signal in a small cell, and the a timing shift value for detection signals of the plurality of CCs that transmitted with shifted timings in the small cell, and, in the user terminal, measuring the plurality of CCs in a measurement gap based on the transmission timing information and the timing shift value.

Abstract translation: 本发明旨在减少其中在宏小区内的每个小小区中使用多个CC的无线电通信系统中的用户终端中的频率间测量的负载。 本发明的频率间测量方法包括以下步骤：从形成宏小区的无线基站到用户终端，在小小区中发送检测信号的发送定时信息，以及用于 基于所述发送定时信息和所述定时偏移值，在所述小小区中以移位的定时发送的所述多个CC的检测信号，以及在所述用户终端中，测量所述多个CC。

公开(公告)号：US09344922B2

公开(公告)日：2016-05-17

申请号：US14406757

申请日：2013-05-14

Applicant: NTT DOCOMO, INC.

Inventor： Jinho Kim ,  Hiroto Yasuda ,  Yasufumi Morioka ,  Hideaki Takahashi ,  Junichiro Hagiwara ,  Hiroyuki Ishii

IPC: H04W4/00 ,  H04W36/00 ,  H04W76/02

CPC classification number: H04W36/0027 ,  H04W36/0088 ,  H04W76/12

Abstract: A radio communication system has a user equipment, a first base station, a second base station, and a gateway device. The first base station is capable of executing radio resource control of the user equipment, whereas the second base station does not execute radio resource control of the user equipment. The first base station, based on a measurement report message, determines whether a user-plane path is to be established between the first base station and the second base station. In a case in which it is determined that a user-plane path is to be established, the first base station establishes a user-plane path between the first base station and the second base station. Also, the first base station controls the user equipment to establish a user-plane path between the user equipment and the second base station.

Abstract translation: 无线电通信系统具有用户设备，第一基站，第二基站和网关设备。 第一基站能够执行用户设备的无线电资源控制，而第二基站不执行用户设备的无线电资源控制。 第一基站，基于测量报告消息，确定在第一基站和第二基站之间是否建立用户平面路径。 在确定要建立用户平面路径的情况下，第一基站在第一基站和第二基站之间建立用户平面路径。 此外，第一基站控制用户设备在用户设备和第二基站之间建立用户平面路径。

公开(公告)号：US20160088579A1

公开(公告)日：2016-03-24

申请号：US14759257

申请日：2013-10-22

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Satoshi Nagata ,  Yoshihisa Kishiyama ,  Yukihiko Okumura ,  Hiroyuki Ishii

IPC: H04W56/00 ,  H04W48/10 ,  H04W48/16

CPC classification number: H04W56/0015 ,  H04W48/10 ,  H04W48/16

Abstract: A radio communication system includes a first base station that is identified by a first cell identity, a second base station that is identified by a second cell identity, and a user device that can perform radio communication with each of the base stations. The user device detects a first transmission timing based on a first synchronization signal from the first base station and establishes synchronization with the first base station. The first base station notifies the user device of synchronization state information related to a synchronization state with the second base station and of frequency information related to an identification signal frequency that is used by the second base station to transmit an identification signal. The user device, based on the synchronization state information, performs identifying processing, on the identification signal frequency indicated by the frequency information, to identify the second cell identity indicated by the identification signal.

Abstract translation: 无线电通信系统包括由第一小区标识识别的第一基站，由第二小区标识识别的第二基站和可以与每个基站执行无线电通信的用户设备。 用户设备基于来自第一基站的第一同步信号检测第一传输定时，并建立与第一基站的同步。 第一基站向用户装置通知与第二基站的同步状态有关的同步状态信息，以及与由第二基站使用的识别信号频率有关的频率信息来发送识别信号。 用户装置基于同步状态信息，对由频率信息指示的识别信号频率执行识别处理，以识别由识别信号指示的第二小区标识。

公开(公告)号：US09220113B2

公开(公告)日：2015-12-22

申请号：US13718541

申请日：2012-12-18

Applicant: NTT DOCOMO, INC.

Inventor： Hiroyuki Ishii ,  Anil Umesh

IPC: H04W72/12

CPC classification number: H04W72/1278 ,  H04W72/1289

Abstract: In a mobile communication method according to the present invention, a mobile station (UE) transmits uplink data to a radio base station by using an uplink radio resource assigned to the mobile station by predetermined scheduling information, in a predetermined cycle. The method includes the steps: (A) notifying, to the mobile station (UE), the predetermined cycle and information on the uplink radio resource; (B) notifying, to the mobile station (UE), the predetermined scheduling information; and (C) transmitting uplink data in the predetermined cycle by using the uplink radio resource assigned by the predetermined scheduling information, the transmission starting at a certain point determined on the basis of the received predetermined scheduling information. In the step (C), the predetermined scheduling information is discarded, when the information on the uplink radio resource and information notified by the predetermined scheduling information are inconsistent with each other.

Abstract translation: 在根据本发明的移动通信方法中，移动台（UE）以预定的周期通过使用通过预定的调度信息分配给移动台的上行无线资源向无线基站发送上行数据。 该方法包括以下步骤：（A）向移动台（UE）通知上行链路无线资源的预定周期和信息; （B）向移动台（UE）通知预定的调度信息; 以及（C）通过使用由预定调度信息分配的上行链路无线电资源在预定周期中发送上行链路数据，从基于接收到的预定调度信息确定的某个点开始发送。 在步骤（C）中，当关于上行链路无线电资源的信息和由预定调度信息通知的信息彼此不一致时，预定调度信息被丢弃。

公开(公告)号：US09220021B2

公开(公告)日：2015-12-22

申请号：US13785865

申请日：2013-03-05

Applicant: NTT DOCOMO, INC.

Inventor： Naoto Ookubo ,  Hiroyuki Ishii ,  Nobuhiko Miki ,  Kenichi Higuchi ,  Yoshihisa Kishiyama

IPC: H04W4/00 ,  H04W24/02 ,  H04L1/00 ,  H04L1/16 ,  H04L5/00

CPC classification number: H04W24/02 ,  H04L1/0013 ,  H04L1/0026 ,  H04L1/0068 ,  H04L1/007 ,  H04L1/0073 ,  H04L1/1671 ,  H04L5/0053

Abstract: A user apparatus transmits an uplink control signal to a base station apparatus using a single carrier scheme. The user apparatus includes: a unit configured to prepare acknowledgement information indicating positive acknowledgement or negative acknowledgement for a downlink data signal based on a result of demodulation of the downlink data signal; a unit configured to prepare channel state information indicating reception quality of a downlink reference signal; a unit configured to channel-code multiplexed control information in which the acknowledgement information and the channel state information are multiplexed to prepare the uplink control signal; and a unit configured to transmit the uplink control signal using dedicated resources different from resources for an uplink data signal.

公开(公告)号：US20150359002A1

公开(公告)日：2015-12-10

申请号：US14760128

申请日：2013-12-05

Applicant: NTT DOCOMO, INC.

Inventor： Tooru Uchino ,  Sadayuki Abeta ,  Kazuaki Takeda ,  Hiroyuki Ishii

IPC: H04W74/08

CPC classification number: H04W74/085 ,  H04W8/26 ,  H04W16/32

Abstract: A system and method to prevent collision between mobile stations to which the same C-RNTI is allocated in a simple implementation while avoiding a problem of C-RNTI depletion in a phantom cell is disclosed. A radio base station includes an allocation unit configured to allocate multiple C-RNTIs to each of mobile stations, and the allocation unit performs adjustment such that collision of search spaces to which PDCCH resources are allocated does not occur among the multiple mobile stations.

Abstract translation: 公开了一种在简单实现中防止分配相同C-RNTI的移动站之间的冲突的系统和方法，同时避免了幻像单元中C-RNTI耗尽的问题。 无线基站包括分配单元，其被配置为向每个移动站分配多个C-RNTI，并且分配单元进行调整，使得在多个移动站中不发生分配了PDCCH资源的搜索空间的冲突。

公开(公告)号：US20150312810A1

公开(公告)日：2015-10-29

申请号：US14441546

申请日：2013-10-04

Applicant: NTT DOCOMO, INC.

Inventor： Hiroto Yasuda ,  Yasufumi Morioka ,  Jinho Kim ,  Hideaki Takahashi ,  Yukihiko Okumura ,  Hiroyuki Ishii

IPC: H04W36/00 ,  H04W36/38 ,  H04W88/16 ,  H04W36/08

CPC classification number: H04W36/0055 ,  H04W36/08 ,  H04W36/38 ,  H04W88/16 ,  H04W92/20

Abstract: A radio communication system includes a user device, a first base station, a second base station, a third base station, a gateway device, and a switching center. A user-plane path is established between the user device and the gateway device via the third base station. When the user device is handed over from the first base station to the second base station, the first base station adds an identifier of the third base station to a handover request message and transmits the handover request message to the second base station. The second base station transmits, to the third base station, a base station switch notification message that indicates that a radio connection destination for the user device has been switched to the second base station.

Abstract translation: 无线电通信系统包括用户设备，第一基站，第二基站，第三基站，网关设备和交换中心。 经由第三基站在用户设备和网关设备之间建立用户平面路径。 当用户设备从第一基站切换到第二基站时，第一基站将第三基站的标识符添加到切换请求消息，并将切换请求消息发送到第二基站。 第二基站向第三基站发送指示用户设备的无线电连接目的地已切换到第二基站的基站交换机通知消息。

公开(公告)号：US20150304914A1

公开(公告)日：2015-10-22

申请号：US14424080

申请日：2013-08-19

Applicant: NTT DOCOMO, INC.

Inventor： Tooru Uchino ,  Sadayuki Abeta ,  Hiroyuki Ishii

IPC: H04W36/04 ,  H04W16/32 ,  H04W74/08 ,  H04W76/02

CPC classification number: H04W36/04 ,  H04W8/26 ,  H04W16/32 ,  H04W36/0077 ,  H04W74/0833 ,  H04W76/20 ,  H04W84/045

Abstract: A C-RNTIph in a phantom cell is allocated to a mobile station UE after the mobile station UE is identified. A mobile communication method according to the present invention includes the steps of: when a cell #10 formed by linking multiple small cells is established in a manner as to at least partially overlap a coverage area of a cell #1 under control of a radio base station eNB#1, notifying a mobile station UE#1 in communication in the cell #1 of a C-RNTIph in the cell #10 by the radio base station eNB#1 by sending “RRC connection reconfiguration”; and setting, by the mobile station UE#1, the C-RNTIph in the cell #10 in addition to a C-RNTImacro in the cell #1.

Abstract translation: 在移动台UE被识别之后，将幻象小区中的C-RNTIph分配给移动台UE。 根据本发明的移动通信方法包括以下步骤：当通过链接多个小小区形成的小区＃10以在无线基站的控制下至少部分地重叠小区＃1的覆盖区域的方式建立时 通过发送“RRC连接重新配置”，通过无线基站eNB＃1向小区＃10中的小区＃1的小区＃1通知移动台UE＃1进行通信; 并且除了小区＃1中的C-RNTImacro之外，由移动台UE＃1设置小区＃10中的C-RNTIph。

公开(公告)号：US20150282174A1

公开(公告)日：2015-10-01

申请号：US14434002

申请日：2013-09-10

Applicant: NTT DOCOMO, INC.

Inventor： Kazuaki Takeda ,  Satoshi Nagata ,  Yoshihisa Kishiyama ,  Hiroyuki Ishii

IPC: H04W72/04 ,  H04L5/14 ,  H04W16/32

CPC classification number: H04W72/0453 ,  H04L5/001 ,  H04L5/0053 ,  H04L5/14 ,  H04L5/1469 ,  H04W16/32 ,  H04W72/0426 ,  H04W72/1268 ,  H04W76/15 ,  H04W84/045 ,  H04W88/02 ,  H04W88/08

Abstract: The present invention is designed to enable 1-CC transmission when carrier aggregation is carried out by aggregating a first component carrier, which is used in a macro cell, and a second component carrier, which is used in a small cell. A user terminal according to the present invention receives duration configuration information, which indicates a first duration to communicate with a macro base station by using the first component carrier, and a second duration to communicate with a small base station by using the second component carrier, configures the first duration and the second duration based on the duration configuration information, transmits uplink signals for the macro base station by using the first component carrier in the first duration, and transmits uplink signals for the small base station by using the second component carrier in the second duration.

Abstract translation: 本发明被设计为当通过聚合在宏小区中使用的第一分量载波和在小小区中使用的第二分量载波来执行载波聚合时的1-CC传输。 根据本发明的用户终端接收持续时间配置信息，其指示通过使用第一分量载波与宏基站通信的第一持续时间，以及通过使用第二分量载波与小型基站进行通信的第二持续时间， 基于持续时间配置信息配置第一持续时间和第二持续时间，通过使用第一持续时间中的第一分量载波来发送用于宏基站的上行链路信号，并且通过使用第二分量载波来发送用于小型基站的上行链路信号 第二个持续时间。

公开(公告)号：US20140120922A1

公开(公告)日：2014-05-01

申请号：US14126934

申请日：2013-03-27

Applicant: NTT DOCOMO, INC

Inventor： Yasufumi Morioka ,  Wuri Andarmawanti Hapsari ,  Anil Umesh ,  Hideaki Takahashi ,  Junichiro Hagiwara ,  Hiroyuki Ishii

IPC: H04W72/12 ,  H04W84/04

CPC classification number: H04W72/1278 ,  H04W16/32 ,  H04W76/15 ,  H04W84/042

Abstract: A first base station forms a first cell and communicates by radio with a user apparatus in a first frequency band. A second base station forms a second cell and communicates by radio with the user apparatus in a second frequency band different from the first frequency band. A gateway apparatus serves as a connection point with an external network. Logical paths used for the user apparatus are established respectively through the first base station and the second base station. A communication control section controls the logical paths and radio communication. The user apparatus sends and receives a user signal to and from the external network by using both a first logical path and a second logical path at the same time.

Abstract translation: 第一基站形成第一小区，并且通过无线电与第一频带中的用户装置进行通信。 第二基站形成第二小区，并且在与第一频带不同的第二频带中与用户装置进行无线通信。 网关装置用作与外部网络的连接点。 分别通过第一基站和第二基站建立用于用户装置的逻辑路径。 通信控制部控制逻辑路径和无线通信。 用户装置通过同时使用第一逻辑路径和第二逻辑路径向外部网络发送和从外部网络接收用户信号。