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1. 发明授权

US11496977B2 User apparatus, base station, discovery signal reception method and discovery signal transmission method 有权
公开(公告)号：US11496977B2
公开(公告)日：2022-11-08
申请号：US14906173
申请日：2014-07-15
申请人： NTT DOCOMO, INC.
发明人： Satoshi Nagata , Qun Zhao , Yongsheng Zhang , Katsutoshi Kusume
IPC分类号： H04W56/00 , H04W8/00 , H04W76/14 , H04W72/04 , H04W92/18
摘要： 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.

2. 发明申请

US20180375704A1 TRANSMIT DIVERSITY FROM ORTHOGONAL DESIGN FOR FBMC/OQAM 审中-公开
公开(公告)号：US20180375704A1
公开(公告)日：2018-12-27
申请号：US15563027
申请日：2016-04-01
申请人： NTT DOCOMO, INC.
发明人： Petra Weitkemper , Katsutoshi Kusume , Jamal Bazzi , Mikio Iwamura
IPC分类号： H04L27/26 , H04L1/06
CPC分类号： H04L27/264 , H04L1/0668 , H04L27/2698
摘要： How to apply an Alamouti like space-time coding (or transmit diversity) to a Filter Bank Multicarrier (FBMC) transmission using Offset QAM (OQAM). In FBMC, due to the orthogonality in the real domain only, an intrinsic interference results thereof for the imaginary component. Simply adapting the Alamouti scheme to FBMC OQAM is not obvious since the intrinsic interference terms are not equivalent at each antenna since it depends on the surrounding symbols. The application proposes to use a precoding symbol chosen to cancel out (zero) the intrinsic interference individually for each antenna, ie a code rate of ½ (sending one data symbol requires two time units). A more elaborated embodiment proposes to choose the contiguous precoding symbols such that a virtual QAM Alamouti scheme is achieved, without rate loss.

3. 发明申请

US20180367353A1 TRANSMIT DIVERSITY FROM ORTHOGONAL DESIGN FOR FBMC/OQAM 审中-公开
公开(公告)号：US20180367353A1
公开(公告)日：2018-12-20
申请号：US15562989
申请日：2016-04-01
申请人： NTT DOCOMO, INC.
发明人： Petra Weitkemper , Katsutoshi Kusume , Jamal Bazzi , Mikio Iwamura
IPC分类号： H04L27/26 , H04L1/06
摘要： How to apply an Alamouti like space-time coding (or transmit diversity) to a Filter Bank Multicarrier (FBMC) transmission using Offset QAM (OQAM). In FBMC, due to the orthogonality in the real domain only, an intrinsic interference results thereof for the imaginary component. Simply adapting the Alamouti scheme to FBMC OQAM is not obvious since the intrinsic interference terms are not equivalent at each antenna since it depends on the surrounding symbols. The application proposes to choose contiguous precoding symbols such that a virtual PAM Alamouti scheme is achieved. Code rates of 1/2 or 2/3 are achieved depending on the number of precoding symbols needed per antenna.

4. 发明申请

US20190273587A1 USER TERMINAL AND RADIO COMMUNICATION METHOD 审中-公开
公开(公告)号：US20190273587A1
公开(公告)日：2019-09-05
申请号：US16345614
申请日：2017-10-25
申请人： NTT DOCOMO, INC.
发明人： Kazuki Takeda , Kazuaki Takeda , Satoshi Nagata , Katsutoshi Kusume
IPC分类号： H04L5/00 , H04W72/04 , H04W72/10 , H04W72/12
摘要： To suitably perform communication using a new control unit, even in the case of using the new control unit comprised of the number of subcarriers different from that of the existing resource block, a user terminal according to one aspect of the present invention is characterized by having a receiving section that receives information on a first resource unit comprised of subcarriers lower in number than a predetermined number, and a control section which identifies a frequency region of a second resource unit comprised of the same number of subcarriers as the predetermined number based on the information, and controls communication using the first resource unit inside the frequency region.

5. 发明授权

US10182393B2 Macro-cell assisted small cell discovery and resource activation 有权
公开(公告)号：US10182393B2
公开(公告)日：2019-01-15
申请号：US15167230
申请日：2016-05-27
申请人： NTT DoCoMo, Inc.
发明人： Patrick Agyapong , Emmanuel Ternon , Liang Hu , Katsutoshi Kusume , Mikio Iwamura
IPC分类号： H04W24/10 , H04W36/00 , H04W48/00 , H04W12/06 , H04W60/02 , H04W48/16 , H04W16/32 , H04W76/27 , H04W76/10 , H04W84/04
摘要： A method is described for controlling a small cell base station in a wireless communication system having a plurality of small cell base stations controlled by a macro base station. The method includes taking, by a small cell base station, a measurement for obtaining information describing a vicinity around the small cell base station and reporting the information from the small cell base station to the macro base station.

6. 发明授权

US09756555B2 User apparatus, base station, discovery resource selection method, and control signal transmission method 有权
公开(公告)号：US09756555B2
公开(公告)日：2017-09-05
申请号：US14888518
申请日：2014-05-01
申请人： NTT DOCOMO, INC.
发明人： Satoshi Nagata , Katsutoshi Kusume , Liang Hu , Hidekazu Taoka
IPC分类号： H04W48/14 , H04W8/00 , H04W92/18
CPC分类号： H04W48/14 , H04W8/005 , H04W92/18
摘要： A user apparatus configured to perform transmission of a discovery signal by radio, including: means that determines a resource group pattern to be used by the user apparatus based on information transmitted from a base station, and determines a resource group including one discovery resource or a plurality of discovery resources that can be used for transmitting the discovery signal from among one resource group or a plurality of resource groups included in the resource group pattern; and means that selects a discovery resource to be used for transmitting the discovery signal from among the determined resource group.

7. 发明申请

US20160198449A1 USER EQUIPMENT, BASE STATION, INFORMATION NOTIFICATION METHOD, AND RESOURCE ALLOCATION METHOD 审中-公开
标题翻译：用户设备，基站，信息通知方法和资源分配方法
公开(公告)号：US20160198449A1
公开(公告)日：2016-07-07
申请号：US14916146
申请日：2014-08-29
申请人： NTT DOCOMO, INC.
发明人： Satoshi Nagata , Katsutoshi Kusume , Liang Hu
IPC分类号： H04W72/04 , H04W16/02 , H04W8/00
CPC分类号： H04W72/0406 , H04W8/005 , H04W16/02 , H04W72/048
摘要： A user apparatus including a function configured to perform device-to-device communication by radio, including: a data storage unit configured to store identification information corresponding to the user apparatus; an identification information obtaining unit configured to receive, from another user apparatus, a discovery signal including identification information corresponding to the other user apparatus, and to obtain the identification information corresponding to the other user apparatus from the discovery signal; and a control signal transmission unit configured to transmit a control signal including the identification information corresponding to the other user apparatus to a base station.
摘要翻译：一种用户装置，包括：通过无线方式进行设备到设备的通信的功能，包括：数据存储单元，被配置为存储与所述用户装置相对应的识别信息; 识别信息获取单元，被配置为从另一个用户装置接收包括与其他用户装置相对应的识别信息的发现信号，并从所述发现信号中获得与所述其他用户装置对应的识别信息; 以及控制信号发送单元，被配置为向基站发送包括与其他用户装置相对应的识别信息的控制信号。

8. 发明授权

US09240831B2 Radio base station apparatus, radio communication system and radio communication method 有权
标题翻译：无线基站装置，无线通信系统和无线通信方式
公开(公告)号：US09240831B2
公开(公告)日：2016-01-19
申请号：US14362702
申请日：2012-11-16
申请人： NTT DOCOMO, INC.
发明人： Yuichi Kakishima , Satoshi Nagata , Hidekazu Taoka , Katsutoshi Kusume
IPC分类号： H04L27/00 , H04B7/06 , H04B7/04
CPC分类号： H04B7/0615 , H04B7/0456 , H04B7/0469 , H04B7/0617 , H04B7/065 , H04B7/0691
摘要： The present invention is designed to implement radio communication to maintain good communication quality even when the number of antennas provided in a radio base station apparatus is greater than the number of transmission layers of a downlink control channel, a broadcast channel, and cell-specific reference signals. When, from a radio base station apparatus (200) having a plurality of transmitting antennas, at least one of a downlink control channel, a broadcast channel and a cell-specific reference signal is transmitted with fewer transmission layers than the number of all transmitting antennas, a smaller number of antennas than the number of all transmitting antennas are made virtual in a precoding weight multiplication section (205), and also transmission weights that make the average transmission power of the transmitting antennas or transmission streams the same are multiplied, and the signals multiplied by the transmission weights are transmitted from the transmitting antennas on the downlink.
摘要翻译：本发明被设计成即使在无线基站装置中设置的天线的数量大于下行链路控制信道，广播信道，小区特定基准的发送层数的情况下，也能够实现无线通信，以保持良好的通信质量信号。当从具有多个发送天线的无线基站装置（200）发送下行链路控制信道，广播信道和小区固有参考信号中的至少一个时，发送次数少于所有发送天线的数量在预编码权重乘法部分（205）中，将虚拟的所有发送天线数量的天线数量减少，并且使发送天线或发送流的平均发送功率相同的发送权重相乘，并且在下行链路上从发送天线发送乘以发送权重的信号。

9. 发明申请

US20160192416A1 USER APPARATUS, COMMUNICATION SYSTEM, AND BACKOFF CONTROL METHOD 审中-公开
标题翻译：用户装置，通信系统和后台控制方法
公开(公告)号：US20160192416A1
公开(公告)日：2016-06-30
申请号：US14392163
申请日：2014-06-30
申请人： NTT DOCOMO, INC.
发明人： Satoshi Nagata , Katsutoshi Kusume , Hidekazu Taoka , Liang Hu
IPC分类号： H04W76/02 , H04W72/08 , H04W8/00
CPC分类号： H04W76/14 , H04W8/005 , H04W72/02 , H04W72/08 , H04W92/18
摘要： A user apparatus having a function for performing device-to-device communication by radio, including: a resource state detection unit configured to detect a state of each resource in a set of resources that can be used for device-to-device communication; a backoff control unit configured, when the state detected by the resource state detection unit satisfies a predetermined condition, to set the user apparatus to be in a backoff state in which the user apparatus does not perform transmission of a discovery signal for a predetermined period; and a discovery signal transmission unit configured, when the user apparatus is not in the backoff state, to select a resource from among the set of resources, and to transmit a discovery signal using the selected resource.
摘要翻译：一种具有通过无线方式进行设备到设备通信的功能的用户装置，包括：资源状态检测单元，被配置为检测可用于设备到设备通信的一组资源中的每个资源的状态; 退避控制单元，当由所述资源状态检测单元检测到的状态满足预定条件时，将所述用户装置设置为处于所述用户装置不进行发现信号的发送一定期间的退避状态; 以及发现信号发送单元，其在所述用户装置不处于退避状态时，从所述资源集合中选择资源，并且使用所选择的资源来发送发现信号。

10. 发明授权

US10003992B2 Macro cell assisted small cell discovery and resource activation 有权
公开(公告)号：US10003992B2
公开(公告)日：2018-06-19
申请号：US15167358
申请日：2016-05-27
申请人： NTT DoCoMo, Inc.
发明人： Patrick Agyapong , Emmanuel Ternon , Liang Hu , Katsutoshi Kusume , Mikio Iwamura
IPC分类号： H04W24/10 , H04W36/00 , H04W52/02 , H04W24/02 , H04W24/08 , H04W72/08 , H04W48/18 , H04W48/16
CPC分类号： H04W24/10 , H04W24/02 , H04W24/08 , H04W48/16 , H04W52/0206 , H04W72/085 , H04W76/10 , Y02D70/00 , Y02D70/1262 , Y02D70/1264 , Y02D70/24
摘要： A method is described for controlling a small cell base station and a user equipment to be served by the small base station in a wireless communication system having a plurality of small cell base stations controlled by a macro base station. The method has, in response to a request from the macro base station to the small cell base station, performing, by the small cell base station, a beacon transmission on one or more resources, in response to a request from the macro base station to the user equipment, performing, by the user equipment, a channel quality measurement on the one or more resources, and reporting the measured channel quality from the user equipment to the macro base station.

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