公开(公告)号：US20150319795A1

公开(公告)日：2015-11-05

申请号：US14439984

申请日：2013-10-04

Applicant: NTT DOCOMO, INC.

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

IPC: H04W76/02 ,  H04W74/00

CPC classification number: H04W76/15 ,  H04W74/002 ,  H04W76/10 ,  H04W76/12 ,  H04W88/16

Abstract: A radio communication system includes at least one user equipment, a first base station, a second base station, a first gateway, a second gateway, and a switching station. The switching station decides whether or not a gateway through which communication executed by the user equipment should be routed is the second gateway. In a case in which it is decided that the gateway through which communication executed by the user equipment should be routed is the second gateway, the switching station executes control for establishing a first user path for uplink and a second user path that is a radio path. The second base station executes control for establishing a first user path for downlink.

Abstract translation: 无线电通信系统包括至少一个用户设备，第一基站，第二基站，第一网关，第二网关和交换站。 交换站决定由用户设备执行的通信所通过的网关是否应被路由为第二网关。 在确定由用户设备执行的通信所通过的网关应该被路由的情况是第二网关的情况下，交换站执行用于建立用于上行链路的第一用户路径和作为无线路径的第二用户路径的控制 。 第二基站执行用于建立用于下行链路的第一用户路径的控制。

公开(公告)号：US20150319775A1

公开(公告)日：2015-11-05

申请号：US14649073

申请日：2013-11-01

Applicant: NTT DOCOMO, INC.

Inventor： Kazuaki Takeda ,  Satoshi Nagata ,  Hideaki Takahashi ,  Hiroyuki Ishii

IPC: H04W74/00 ,  H04L27/26 ,  H04W72/04 ,  H04L5/00

CPC classification number: H04W74/002 ,  H04L5/0048 ,  H04L25/00 ,  H04L25/0224 ,  H04L27/2601 ,  H04W48/16 ,  H04W72/0406 ,  H04W72/12 ,  H04W88/02 ,  H04W88/08

Abstract: The present invention is designed so that a fading frequency estimation method that can improve the mobility of user terminals in a HetNet can be provided. The fading frequency estimation method according to the present invention includes the steps, in which a radio base station arranges reference signals, using an arrangement format, in which the reference signals, which are used to estimate the fading frequency in the user terminal, are arranged in a relatively high density, in at least part of the radio resources allocated for a downlink shared data channel, and transmits allocation information of the radio resources for the downlink shared data channel to the user terminal, and the user terminal estimates the fading frequency based on the channel estimation values of the reference signals, and transmits the estimated fading frequency to the radio base station in response to a transmission request from the radio base station.

Abstract translation: 本发明被设计成能够提供可以提高HetNet中的用户终端的移动性的衰落频率估计方法。 根据本发明的衰落频率估计方法包括以下步骤：无线电基站使用排列格式布置参考信号，其中用于估计用户终端中的衰落频率的参考信号被布置 在分配给下行链路共享数据信道的无线电资源的至少一部分中以相对较高的密度发送用于下行链路共享数据信道的无线电资源的分配信息给用户终端，并且用户终端基于衰落频率来估计衰落频率 对于参考信号的信道估计值，并且响应于来自无线电基站的传输请求，将估计的衰落频率发送到无线电基站。

公开(公告)号：US20150263832A1

公开(公告)日：2015-09-17

申请号：US14435488

申请日：2013-10-04

Applicant: NTT DOCOMO, INC.

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

IPC: H04L5/00 ,  H04W72/04 ,  H04W16/32

CPC classification number: H04L5/0035 ,  H04J11/0053 ,  H04J13/0003 ,  H04J13/10 ,  H04J2211/001 ,  H04L5/001 ,  H04L5/0037 ,  H04L5/0053 ,  H04W16/32 ,  H04W72/0406 ,  H04W72/042 ,  H04W84/045

Abstract: A method and system for carrying out communication adequately in a HetNet even when the radio resource region for downlink control channels is expanded is disclosed. A radio communication method in a radio communication system having a macro base station that forms a macro cell and a small base station that forms a small cell such that at least part of the small cell overlaps the macro cell is provided, and the small base station performs the steps of generating specific control information of user terminals, scrambling the specific control information by using user-specific scrambling sequences, and transmitting the specific control information to user terminals in the small cell by using an enhanced downlink control channel that is frequency-division-multiplexed with a downlink shared data channel.

Abstract translation: 公开了一种用于在HetNet中充分进行通信的方法和系统，即使在用于下行链路控制信道的无线电资源区域被扩展的情况下也是如此。 在具有形成宏小区的宏基站和形成小小区的小型基站的无线通信系统中的无线通信方法，使得至少部分小区域与宏小区重叠，小基站 执行生成用户终端的特定控制信息的步骤，通过使用用户特定的加扰序列对特定的控制信息进行加扰，以及通过使用分频的增强型下行链路控制信道将特定控制信息发送到小小区中的用户终端 与下行链路共享数据信道进行复用。

公开(公告)号：US20150181508A1

公开(公告)日：2015-06-25

申请号：US14416368

申请日：2013-07-17

Applicant: NTT DOCOMO, INC.

Inventor： Tooru Uchino ,  Hiroyuki Ishii

IPC: H04W48/16

CPC classification number: H04W48/16 ,  H04W16/32

Abstract: A “macro-assisted cell” adaptable to multiple operation modes is realized. In a mobile station (UE) of the invention, a control unit (22) is configured to start communication in a small cell on the basis of MIB/SIB of the small cell when a sequence in a “discovery signal” is determined as a sequence for a “stand-alone cell.” The control unit (22) is configured to start the communication in the small cell on the basis of a control signal from a macro cell when the sequence in the “discovery signal” is determined as a sequence for a “macro-assisted cell.”

Abstract translation: 实现了适用于多种操作模式的“宏辅助单元”。 在本发明的移动台（UE）中，控制单元（22）被配置为当“发现信号”中的序列被确定为小时，在小单元的MIB / SIB的基础上开始小小区中的通信 “独立单元”的顺序。控制单元（22）被配置为当“发现信号”中的顺序被确定为一个单元时，基于来自宏小区的控制信号在小单元中开始通信 “宏观辅助细胞”的序列。

公开(公告)号：US20150172034A1

公开(公告)日：2015-06-18

申请号：US14416295

申请日：2013-06-27

Applicant: NTT DOCOMO, INC.

Inventor： Yoshihisa Kishiyama ,  Kazuaki Takeda ,  Satoshi Nagata ,  Takehiro Nakamura ,  Hideaki Takahashi ,  Sadayuki Abeta ,  Hiroyuki Ishii

IPC: H04L5/00

Abstract: A system for supporting smooth mobility of a mobile terminal apparatus between a plurality of local areas that are arranged in a wide area is disclosed. The system includes a wide area base station apparatus that covers a wide area, a local area base station apparatus that covers a local area arranged in the wide area, and a mobile terminal apparatus that can communicate with the wide area base station apparatus and the local area base station apparatus, and is configured to scramble a data signal and a reference signal by a scrambling sequence that is common between a plurality of local areas in communication between the local area base station apparatus and the mobile terminal apparatus.

Abstract translation: 公开了一种用于支持移动终端设备在布置在广泛区域中的多个局域之间的平滑移动性的系统。 该系统包括覆盖广域的广域基站装置，覆盖广域布置的局域的局域基站装置，以及能够与广域基站装置和本地的基站装置进行通信的移动终端装置 并且被配置为通过在局域基站装置和移动终端装置之间的通信中的多个局部区域之间共同的加扰序列来加扰数据信号和参考信号。

公开(公告)号：US20130294372A1

公开(公告)日：2013-11-07

申请号：US13929452

申请日：2013-06-27

Applicant: NTT DOCOMO, INC.

Inventor： Hiroyuki Ishii ,  Anil Umesh

IPC: H04W72/04

CPC classification number: H04W72/0406 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/1273

Abstract: A base station apparatus capable of communicating with a user equipment terminal using a downlink shared channel is disclosed. The base station apparatus includes a radio resource allocation unit allocating radio resource blocks to the shared channel after allocating the radio resource blocks to at least one of a synchronization signal, a common control channel, a broadcast channel, a paging channel, an MBMS channel, and a random access response channel.

公开(公告)号：US20130242893A1

公开(公告)日：2013-09-19

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，从基于所接收的预定调度信息确定的某一点开始发送。 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。