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1. 发明授权

US09699745B2 Radio communication system and communication control method 有权
公开(公告)号：US09699745B2
公开(公告)日：2017-07-04
申请号：US14403788
申请日：2013-05-15
申请人： NTT DOCOMO, INC.
发明人： Hiroki Harada , Yusuke Ohwatari , Akihito Morimoto , Yukihiko Okumura
IPC分类号： H04W48/16 , H04W48/12 , H04W56/00 , H04W16/32 , H04W24/02
CPC分类号： H04W56/001 , H04W16/32 , H04W24/02 , H04W48/12 , H04W48/16
摘要： A radio communication system includes a user device, base stations, and a communication control device. The communication control device generates and reports, to the user device, selection information that is used to select base stations with which the user device should maintain synchronization. The user device selects, based on the selection information, base stations with which the user device should maintain synchronization. The user device reports, to the communication control device, identifiers of the selected base stations and received levels of radio waves transmitted from the base stations corresponding to the identifiers. The user device maintains synchronization with each of the selected base stations.

2. 发明授权

US09241306B2 Radio communication system, mobile station, base station, and communication control method 有权
标题翻译：无线电通信系统，移动台，基站和通信控制方法
公开(公告)号：US09241306B2
公开(公告)日：2016-01-19
申请号：US14353880
申请日：2012-11-15
申请人： NTT DOCOMO, INC.
发明人： Masashige Shirakabe , Akihito Morimoto , Nobuhiko Miki , Satoshi Nagata
IPC分类号： H04W36/04 , H04W16/32 , H04W48/20 , H04W84/04
CPC分类号： H04W48/20 , H04W84/045
摘要： A radio communication system includes multiple base stations including a first base station and a second base station, and a mobile station. A candidate base station selector selects multiple candidate base stations that are candidates for a radio access point for the mobile station on the basis of the reception powers reported by the mobile station. When the mobile station actually executes wireless communication with the base station, an access-point base station determiner determines, as an access-point base station that is the actual radio access point for the mobile station, a base station corresponding to a best reception quality among reception qualities measured in the protected resource and reception quality measured in the non-protected resource.
摘要翻译：无线电通信系统包括包括第一基站和第二基站以及移动台的多个基站。候选基站选择器基于移动台报告的接收功率来选择作为移动台的无线接入点候选的多个候选基站。当移动台实际上执行与基站的无线通信时，接入点基站确定器确定作为移动台的实际无线接入点的接入点基站，对应于最佳接收质量的基站在受保护的资源中测量的接收质量和在非保护资源中测量的接收质量。

3. 发明授权

US09185710B2 Radio communication system and radio base station 有权
标题翻译：无线电通信系统和无线电基站
公开(公告)号：US09185710B2
公开(公告)日：2015-11-10
申请号：US14394166
申请日：2013-03-26
申请人： NTT DOCOMO, INC.
发明人： Akihito Morimoto , Masashige Shirakabe , Nobuhiko Miki , Yukihiko Okumura
IPC分类号： H04W72/04 , H04W16/08 , H04W16/32 , H04W48/16 , H04L5/00 , H04W52/34
CPC分类号： H04W72/0493 , H04L5/0032 , H04W16/08 , H04W16/32 , H04W48/16 , H04W52/244 , H04W52/34
摘要： A high-power radio base station includes a resource setter configured to determine a ratio of the number of second resources at which the radio communicator should stop radio transmission to the sum of the number of the second resources and the number of first resources at which the radio communicator should execute radio transmission. The resource setter determines the ratio on the basis of a first number and a second number, the first number being the number of mobile terminals that are assumed to be connected with the radio base station, rather than the low-power radio base station, when cell range expansion (CRE) is not applied, but are connected with the low-power radio base station by virtue of application of cell range expansion, the second number being the number of mobile terminals connected with the radio base station when cell range expansion is applied. The resource setter determines the ratio in such a manner that the greater the proportion of the second number to the first number, the smaller the ratio.
摘要翻译：高功率无线基站包括：资源设定器，被配置为确定无线电通信器应该停止无线电传输的第二资源的数量与第二资源的数量和第一资源的数量之和的比率，无线电通信器应执行无线电传输。资源设置器基于第一个数字和第二个数字来确定比率，第一个数字是假定与无线电基站而不是低功率无线电基站相连接的移动终端的数量，当时小区范围扩展（CRE）不被应用，但是通过应用小区扩展与低功率无线基站连接，第二个数字是当小区范围扩展为无线基站时与无线基站相连的移动终端的数量应用。资源设置者以这样的方式确定比例，即第二个数字与第一个数字的比例越大，比率越小。

4. 发明申请

US20150156737A1 RADIO COMMUNICATION SYSTEM AND COMMUNICATION CONTROL METHOD 有权
标题翻译：无线电通信系统和通信控制方法
公开(公告)号：US20150156737A1
公开(公告)日：2015-06-04
申请号：US14403788
申请日：2013-05-15
申请人： NTT DOCOMO, INC.
发明人： Hiroki Harada , Yusuke Ohwatari , Akihito Morimoto , Yukihiko Okumura
IPC分类号： H04W56/00
CPC分类号： H04W56/001 , H04W16/32 , H04W24/02 , H04W48/12 , H04W48/16
摘要： A radio communication system includes a user device, base stations, and a communication control device. The communication control device generates and reports, to the user device, selection information that is used to select base stations with which the user device should maintain synchronization. The user device selects, based on the selection information, base stations with which the user device should maintain synchronization. The user device reports, to the communication control device, identifiers of the selected base stations and received levels of radio waves transmitted from the base stations corresponding to the identifiers. The user device maintains synchronization with each of the selected base stations.
摘要翻译：无线电通信系统包括用户设备，基站和通信控制设备。通信控制装置生成并向用户装置报告用于选择用户装置应该保持同步的基站的选择信息。用户设备基于选择信息来选择用户设备应该保持同步的基站。用户设备向通信控制设备报告所选择的基站的标识符和从与标识符相对应的基站发送的无线电波的接收电平。用户设备保持与所选择的每个基站的同步。

5. 发明申请

US20150146638A1 RADIO COMMUNICATION SYSTEM AND RADIO BASE STATION 有权
标题翻译：无线电通信系统和无线电基站
公开(公告)号：US20150146638A1
公开(公告)日：2015-05-28
申请号：US14405261
申请日：2013-05-21
申请人： NTT DOCOMO, INC.
发明人： Yusuke Ohwatari , Akihito Morimoto , Yukihiko Okumura
IPC分类号： H04W52/24 , H04W16/14 , H04W24/02
CPC分类号： H04W52/243 , H04W16/08 , H04W16/14 , H04W16/32 , H04W24/02 , H04W52/143 , H04W52/244 , H04W52/38 , H04W52/40
摘要： In a radio communication system in which a high-power base station and a low-power base station collaborate for inter-cell interference control, the downlink transmission power at the high-power base station is suitably controlled. The high-power base station executes wireless transmission to the user terminals using resources that are the same as resources used by the low-power radio base station. A transmission power controller of the radio base station uses a first downlink transmission power at first resources and uses a lower second downlink transmission power at second resources. The transmission power controller adjusts the second downlink transmission power in accordance with the number of user terminals capable of executing interference rejection combining, the downlink traffic amount for user terminals capable of executing interference rejection combining, or the number of downlink resource blocks allocated to user terminals capable of executing interference rejection combining.
摘要翻译：在大功率基站和低功率基站协作用于小区间干扰控制的无线通信系统中，适当地控制高功率基站的下行链路发送功率。高功率基站使用与低功率无线基站所使用的资源相同的资源，向用户终端执行无线传输。无线基站的发送功率控制器以第一资源使用第一下行链路发送功率，并以第二资源使用较低的第二下行链路发送功率。发送功率控制器根据能够执行干扰抑制组合的用户终端的数量，能够执行干扰抑制组合的用户终端的下行业务量，或分配给用户终端的下行链路资源块的数量来调整第二下行链路发送功率能够执行干扰抑制组合。

6. 发明授权

US09520915B2 Radio communication system, radio base station, and mobile terminal 有权
标题翻译：无线电通信系统，无线电基站和移动终端
公开(公告)号：US09520915B2
公开(公告)日：2016-12-13
申请号：US14232139
申请日：2013-04-11
申请人： NTT DOCOMO, INC.
发明人： Yousuke Sano , Yusuke Ohwatari , Nobuhiko Miki , Akihito Morimoto , Yukihiko Okumura
IPC分类号： H04W4/00 , H04B17/00 , H04B1/62 , H04W16/28 , H04W24/10 , H04W28/16 , H04W72/08 , H04B7/02 , H04J11/00 , H04B7/06 , H04B7/04 , H04B7/08
CPC分类号： H04B1/62 , H04B7/024 , H04B7/0452 , H04B7/0617 , H04B7/0626 , H04B7/0628 , H04B7/0645 , H04B7/0854 , H04J11/005 , H04W16/28 , H04W24/10 , H04W28/16 , H04W72/082
摘要： In a radio communication system including multiple mobile terminals and multiple radio base stations, the mobile terminal has a function of interference rejection combining. The radio base stations share downlink channel characteristics for mobile terminals connected to radio base stations. The radio base station gives weights to radio waves transmitted from multiple transmission antennas to perform in-phase addition of an interfering radio wave beam directed to a mobile terminal for which the desired radio base station is another radio base station to an interfering radio wave beam transmitted from yet another radio base station for limiting the number of interfering radio wave beams that arrive at the mobile terminal. The radio base station does not perform in-phase addition when the number of interfering radio wave beams of which interference can be suppressed by the mobile terminal is equal to or greater than the number of radio base stations that send interfering radio wave beams to the mobile terminal.
摘要翻译：在包括多个移动终端和多个无线基站的无线通信系统中，移动终端具有干扰抑制组合的功能。无线基站共享与无线基站相连的移动终端的下行信道特性。无线基站对从多个发送天线发送的无线电波赋予权重，以将针对期望的无线基站为另一无线基站的移动终端的干扰无线电波的同相相加到发送的干扰无线电波束来自另一个用于限制到达移动终端的干扰无线电波束的数量的无线电基站。当能够通过移动终端抑制干扰的干扰无线电波束的数量等于或大于发送干扰无线电波束到移动台的无线电基站的数量时，无线电基站不执行同相相加终奌站。

7. 发明申请

US20150119053A1 RADIO COMMUNICATION SYSTEM AND RADIO BASE STATION 有权
标题翻译：无线电通信系统和无线电基站
公开(公告)号：US20150119053A1
公开(公告)日：2015-04-30
申请号：US14394166
申请日：2013-03-26
申请人： NTT DOCOMO, INC.
发明人： Akihito Morimoto , Masashige Shirakabe , Nobuhiko Miki , Yukihiko Okumura
IPC分类号： H04W72/04 , H04L5/00 , H04W52/34
CPC分类号： H04W72/0493 , H04L5/0032 , H04W16/08 , H04W16/32 , H04W48/16 , H04W52/244 , H04W52/34
摘要： A high-power radio base station includes a resource setter configured to determine a ratio of the number of second resources at which the radio communicator should stop radio transmission to the sum of the number of the second resources and the number of first resources at which the radio communicator should execute radio transmission. The resource setter determines the ratio on the basis of a first number and a second number, the first number being the number of mobile terminals that are assumed to be connected with the radio base station, rather than the low-power radio base station, when cell range expansion (CRE) is not applied, but are connected with the low-power radio base station by virtue of application of cell range expansion, the second number being the number of mobile terminals connected with the radio base station when cell range expansion is applied. The resource setter determines the ratio in such a manner that the greater the proportion of the second number to the first number, the smaller the ratio.
摘要翻译：高功率无线基站包括：资源设定器，被配置为确定无线电通信器应该停止无线电传输的第二资源的数量与第二资源的数量和第一资源的数量之和的比率，无线电通信器应执行无线电传输。资源设置器基于第一个数字和第二个数字来确定比率，第一个数字是假定与无线电基站而不是低功率无线电基站相连接的移动终端的数量，当时小区范围扩展（CRE）不被应用，但是通过应用小区扩展与低功率无线基站连接，第二个数字是当小区范围扩展为无线基站时与无线基站相连的移动终端的数量应用。资源设置者以这样的方式确定比例，即第二个数字与第一个数字的比例越大，比率越小。

8. 发明授权

US09397818B2 Enhanced inter-cell interference control in a radio communication system 有权
标题翻译：无线电通信系统中增强的小区间干扰控制
公开(公告)号：US09397818B2
公开(公告)日：2016-07-19
申请号：US14391103
申请日：2013-03-26
申请人： NTT DOCOMO, INC.
发明人： Akihito Morimoto , Nobuhiko Miki
IPC分类号： H04L5/00 , H04W48/12 , H04B7/04 , H04W52/24 , H04W52/00 , H04W52/40 , H04W16/28 , H04W16/32 , H04W88/08 , H04W72/08
CPC分类号： H04L5/0073 , H04B7/0413 , H04L5/00 , H04W16/28 , H04W16/32 , H04W48/12 , H04W52/00 , H04W52/244 , H04W52/40 , H04W72/082 , H04W88/08
摘要： A radio base station communicates with mobile terminals and is configured to be able to execute radio transmission to the mobile terminals using resources that are the same as resources used by a second radio base station forming a second cell having a smaller area within a first cell formed by the radio base station itself and is configured to collaborate with the second radio base station for inter-cell interference control. The radio base station sets a modulation system having a modulation level that is less than that of the modulation system provisionally determined as the modulation system for mobile terminals to which a resource group having a low transmission power is assigned and adjusts transmission parameters in a case in which the modulation system provisionally determined for the mobile terminals to which the resource group having the low transmission power is assigned, is inappropriate for the low transmission power.
摘要翻译：无线基站与移动终端进行通信，并且被配置为能够使用与由形成第一小区内的具有较小区域的第二小区的第二无线基站所使用的资源相同的资源来执行向移动终端的无线电传输由无线基站自身配置，与第二无线基站协作进行小区间干扰控制。无线基站设定调制方式，该调制方式的调制度小于作为调度方式被暂时确定的调制方式的调制方式，对于分配有低发送功率的资源群的移动终端，调制方式调整发送参数对于分配有低发送功率的资源组的移动终端暂时确定的调制方式对于低发送功率是不合适的。

9. 发明申请

US20150117341A1 RADIO COMMUNICATION SYSTEM, RADIO BASE STATION, AND COMMUNICATION CONTROL METHOD 审中-公开
标题翻译：无线电通信系统，无线基站和通信控制方法
公开(公告)号：US20150117341A1
公开(公告)日：2015-04-30
申请号：US14390903
申请日：2013-03-12
申请人： NTT DOCOMO, INC.
发明人： Yusuke Ohwatari , Nobuhiko Miki , Akihito Morimoto , Yukihiko Okumura
IPC分类号： H04L5/00 , H04W72/08
CPC分类号： H04L5/0032 , H04W8/24 , H04W16/10 , H04W16/32 , H04W48/20 , H04W52/04 , H04W72/048 , H04W72/082
摘要： Resources available for large power base stations are controlled in a radio communication system in which mobile terminals with and without interference suppression capability are used together and in which a large power base station and small power base stations coordinate inter-cell interference control. A radio base station coordinates inter-cell interference control with at least one second radio base station forming a second cell within a first cell of the radio base station, the second cell having a smaller area than the first cell. The radio base station has a resource setter for setting a ratio of a first resource in which the radio base station is to execute radio communication and a second resource in which the radio base station is to stop radio communication according to the ratio of the number of mobile terminals capable of executing interference rejection combining to the total number of mobile terminals connecting to the radio base station or to at least one second radio base station.
摘要翻译：可用于大功率基站的资源在具有和不具有干扰抑制能力的移动终端一起使用并且大功率基站和小功率基站协调小区间干扰控制的无线电通信系统中被控制。无线基站与在无线基站的第一小区内形成第二小区的至少一个第二无线基站协调小区间干扰控制，第二小区具有比第一小区更小的面积。无线基站具有用于设定无线基站执行无线通信的第一资源与无线基站停止无线通信的第二资源的比率的资源设定器，能够对连接到无线电基站或至少一个第二无线电基站的移动终端的总数进行干扰抑制的移动终端。

10. 发明申请

US20150029951A1 RADIO COMMUNICATION SYSTEM, RADIO BASE STATION, AND MOBILE TERMINAL 有权
标题翻译：无线电通信系统，无线电基站和移动终端
公开(公告)号：US20150029951A1
公开(公告)日：2015-01-29
申请号：US14232139
申请日：2013-04-11
申请人： NTT DOCOMO, INC.
发明人： Yousuke Sano , Yusuke Ohwatari , Nobuhiko Miki , Akihito Morimoto , Yukihiko Okumura
IPC分类号： H04B1/62 , H04W72/08
CPC分类号： H04B1/62 , H04B7/024 , H04B7/0452 , H04B7/0617 , H04B7/0626 , H04B7/0628 , H04B7/0645 , H04B7/0854 , H04J11/005 , H04W16/28 , H04W24/10 , H04W28/16 , H04W72/082
摘要： In a radio communication system including multiple mobile terminals and multiple radio base stations, the mobile terminal has a function of interference rejection combining. The radio base stations share downlink channel characteristics for mobile terminals connected to radio base stations. The radio base station gives weights to radio waves transmitted from multiple transmission antennas to perform in-phase addition of an interfering radio wave beam directed to a mobile terminal for which the desired radio base station is another radio base station to an interfering radio wave beam transmitted from yet another radio base station for limiting the number of interfering radio wave beams that arrive at the mobile terminal. The radio base station does not perform in-phase addition when the number of interfering radio wave beams of which interference can be suppressed by the mobile terminal is equal to or greater than the number of radio base stations that send interfering radio wave beams to the mobile terminal.
摘要翻译：在包括多个移动终端和多个无线基站的无线通信系统中，移动终端具有干扰抑制组合的功能。无线基站共享与无线基站相连的移动终端的下行信道特性。无线基站对从多个发送天线发送的无线电波赋予权重，以将针对期望的无线基站为另一无线基站的移动终端的干扰无线电波的同相相加到发送的干扰无线电波束来自另一个用于限制到达移动终端的干扰无线电波束的数量的无线电基站。当能够通过移动终端抑制干扰的干扰无线电波束的数量等于或大于发送干扰无线电波束到移动台的无线电基站的数量时，无线电基站不执行同相相加终奌站。

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