公开(公告)号：US20230024432A1

公开(公告)日：2023-01-26

申请号：US17959071

申请日：2022-10-03

Applicant: Sun Patent Trust

Inventor： Takashi IWAI ,  Akihiko NISHIO ,  Daichi IMAMURA ,  Yoshihiko OGAWA ,  Atsushi MATSUMOTO

IPC: H04W52/36 ,  H04L5/00 ,  H04W72/04

Abstract: A radio communication apparatus is provided, which includes a receiver and a controller. The receiver, in operation, receives a first power headroom (PHR), which is obtained by subtracting a transmit power for a data channel from a maximum transmit power at a mobile station and which is transmitted from the mobile station, and receives a second PHR, which is obtained by subtracting the transmit power for the data channel and a transmit power for a control channel from the maximum transmit power at the mobile station and which is transmitted from the mobile station. The controller, in operation, selectively sets a simultaneous transmission of the data channel and the control channel in different frequency bands to be performed by the mobile station. When the data channel and the control channel are simultaneously transmitted in different frequency bands from the mobile station, the second PHR is obtained and transmitted from the mobile station.

公开(公告)号：US20220345254A1

公开(公告)日：2022-10-27

申请号：US17861029

申请日：2022-07-08

Applicant: Sun Patent Trust

Inventor： Akihiko NISHIO ,  Seigo NAKAO

IPC: H04L1/18 ,  H04J11/00 ,  H04L5/00 ,  H04W52/32 ,  H04W72/10 ,  H04B7/0426 ,  H04B7/06

Abstract: Disclosed is a wireless communication base station apparatus whereby it is possible to prevent degradation of throughput of LTE terminals, even when LTE terminals and LTE+ terminals are present together. In this apparatus, a setting section (105) sets in each subframe a resource block in which is arranged a reference signal that is employed solely by LTE+ terminals, based on the pattern of arrangement of reference signals employed solely by LTE+ terminals. In the case of symbols that are mapped to antennas (110-1) to (110-4), an arrangement section (106) arranges the characteristic cell reference signals employed by both LTE terminals and LTE+ terminals in all of the resource blocks in a single frame. In contrast, in the case of the symbols that are mapped to the antennas (110-5) to (110-8), the arrangement section (106) arranges in some of the resource blocks, that are set in accordance with the setting results input from a setting section (105), the characteristic cell reference signals that are employed solely by the LTE+ terminals.

公开(公告)号：US20200280978A1

公开(公告)日：2020-09-03

申请号：US16878292

申请日：2020-05-19

Applicant: Sun Patent Trust

Inventor： Akihiko NISHIO ,  Toru OIZUMI ,  Ayako HORIUCHI

IPC: H04W72/04 ,  H04L1/16 ,  H04L5/00

Abstract: Provided are a wireless communication terminal device and a control channel forming method with which, in the forming of a control channel for transmitting control information including an ACK/NACK and CSI (channel state information), wasteful use of resources is reduced compared to that in related art. In the case where CSI is transmitted independently, and in the case where CSI and an ACK/NACK are transmitted at the same time, the same format is used to form a control channel. Furthermore, in the case where an ACK/NACK is transmitted independently, another format is used if a component carrier (CC) number is equal to or less than 2, and the same format is used if the CC number is equal to or greater than 3.

公开(公告)号：US20200252937A1

公开(公告)日：2020-08-06

申请号：US16856368

申请日：2020-04-23

Applicant: Sun Patent Trust

Inventor： Akihiko NISHIO ,  Seigo NAKAO

IPC: H04W72/04 ,  H04L5/00 ,  H04L1/00

Abstract: A wireless communication base station device which makes it possible to provide a base station, terminal and CCE allocation method capable of reducing the number of times blind decoding of a terminal is performed, without increasing the CCE block rate, even when a plurality of unit bands are set in a terminal. In this device, a search space setting section (103) sets in each of a plurality of unit bands a common search space in respect of a terminal which is communicating using the plurality of unit bands and other terminals, and sets in each of the plurality of unit bands an individual search space in respect of the terminal. An allocation section (106) allocates control information solely to CCEs within the common search spaces set in specified unit bands among the plurality of unit bands, or solely to CCEs within individual search spaces set in specified unit bands.

公开(公告)号：US20190191413A1

公开(公告)日：2019-06-20

申请号：US16282092

申请日：2019-02-21

Applicant: SUN PATENT TRUST

Inventor： Masayuki HOSHINO ,  Akihiko NISHIO ,  Seigo NAKAO ,  Daichi IMAMURA ,  Yasuaki YUDA

IPC: H04W72/04 ,  H04L1/00 ,  H04W72/12 ,  H04B17/00 ,  H04W24/10 ,  H04B7/06 ,  H04B17/24 ,  H04L5/00

CPC classification number: H04W72/04 ,  H04B7/0626 ,  H04B17/0085 ,  H04B17/24 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0027 ,  H04L1/1607 ,  H04L5/0048 ,  H04W24/10 ,  H04W72/1268 ,  H04W88/02

Abstract: To suppress concentration of channel quality information requests and reports in a case of discontinuously transmitting reference signals at specific resources in a time domain, and thereby preventing degradation in throughput. A transmission apparatus transmits an instruction of CSI request distributed for each reception apparatus in a subframe concurrently with or earlier than a reference signal CSI-RS to each of reception apparatuses. Each of the reception apparatuses detects the CSI request from the transmission apparatus and calculates CSI from a channel estimation value of CSI-RS received thereafter. Then, the reception apparatus identifies CSI report subframe of the own apparatus from CSI report interval information of a given time interval notified in advance, the subframe in which the CSI request is detected and transmission timing of CSI-RS, and transmits a feedback signal including CSI report value by using PUSCH at the timing of the CSI report subframe.

公开(公告)号：US20180323937A1

公开(公告)日：2018-11-08

申请号：US16040304

申请日：2018-07-19

Applicant: Sun Patent Trust

Inventor： Yoshihiko OGAWA ,  Akihiko NISHIO ,  Seigo NAKAO

IPC: H04L5/00 ,  H04L1/18 ,  H04L1/16 ,  H04W72/04 ,  H04B7/0452 ,  H04B7/0413

CPC classification number: H04L5/0053 ,  H04B7/0413 ,  H04B7/0452 ,  H04L1/1671 ,  H04L1/1861 ,  H04L5/0023 ,  H04L5/0055 ,  H04L5/0057 ,  H04L27/2636 ,  H04W72/0406 ,  H04W72/0413

Abstract: This invention is directed to a terminal apparatus capable of preventing the degradation of reception quality of control information even in a case of employing SU-MIMO transmission system. A terminal (200), which uses a plurality of different layers to transmit two code words in which control information is placed, comprises: a resource amount determining unit (204) that determines, based on a lower one of the encoding rates of the two code words or based on the average value of the reciprocals of the encoding rates of the two code words, resource amounts of control information in the respective ones of the plurality of layers; and a transport signal forming unit (205) that places, in the two code words, the control information modulated by use of the resource amounts, thereby forming a transport signal.

公开(公告)号：US20180213533A1

公开(公告)日：2018-07-26

申请号：US15899045

申请日：2018-02-19

Applicant: SUN PATENT TRUST

Inventor： Akihiko NISHIO ,  Masaru FUKUOKA

IPC: H04W72/04 ,  H04W24/10 ,  H04B7/12 ,  H04L1/00 ,  H04L5/00 ,  H04B7/0452 ,  H04W52/32 ,  H04W52/22 ,  H04W88/08

CPC classification number: H04W72/0406 ,  H04B7/0452 ,  H04B7/12 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L5/0005 ,  H04L5/0053 ,  H04W24/10 ,  H04W52/221 ,  H04W52/325 ,  H04W72/042 ,  H04W72/0453 ,  H04W72/0493 ,  H04W88/08

Abstract: A base station can prevent deterioration of data channel application control accuracy due to influence of transmission power control to a control channel. In the base station, each encoding section performs encoding processing to an SCCH (Shared Control Channel) of each mobile station, each modulating section performs modulation processing to the encoded SCCH, an arranging section arranges the SCCH to each mobile station to one of a plurality of subcarriers which configure an OFDM symbol, and transmission power control section controls transmission power of the SCCH based on reception quality information reported from each mobile station. The arranging section arranges a plurality of the SCCH to be under transmission power control to one of the subcarriers so that combinations at resource blocks are the same.

公开(公告)号：US20180183555A1

公开(公告)日：2018-06-28

申请号：US15894199

申请日：2018-02-12

Applicant: Sun Patent Trust

Inventor： Takashi IWAI ,  Akihiko NISHIO ,  Yoshihiko OGAWA ,  Seigo NAKAO ,  Masayuki HOSHINO

IPC: H04L5/00 ,  H04J11/00 ,  H04L23/02 ,  H04B7/024 ,  H04J13/00 ,  H04L12/801 ,  H04L27/26 ,  H04B7/0452

CPC classification number: H04L5/0048 ,  H04B7/024 ,  H04B7/0452 ,  H04J11/0023 ,  H04J11/0026 ,  H04J11/0053 ,  H04J11/0056 ,  H04J13/0062 ,  H04L5/0032 ,  H04L5/0035 ,  H04L23/02 ,  H04L27/2613 ,  H04L47/34

Abstract: Provided are a radio communication terminal apparatus and a radio transmission method by which intersymbol interference of DM-RS of a CoMP terminal and a Non-CoMP terminal can be reduced. A CoMP set setting unit (102) sets the cell IDs of all cells in the CoMP set in a cell selection unit (104), and a serving cell setting unit (103) sets the cell ID of the serving cell in the cell selection unit (104). The cell selection unit (104) selects the cell ID having a number closest to the cell ID of the serving cell from the cells in the CoMP set. A sequence information calculation unit (106) derives a sequence group number from the selected cell ID, and the sequence information calculation unit (106) calculates a sequence number from the derived sequence group number and a transmission bandwidth of the DM-RS.

公开(公告)号：US20180102884A1

公开(公告)日：2018-04-12

申请号：US15836240

申请日：2017-12-08

Applicant: Sun Patent Trust

Inventor： Seigo NAKAO ,  Akihiko NISHIO ,  Daichi IMAMURA

IPC: H04L5/00 ,  H04B7/06 ,  H04W72/04 ,  H04W28/06 ,  H04W88/08 ,  H04W28/04

Abstract: In a base station, a control unit and a data size regulation unit control the data size of downstream assignment control data and upstream assignment control data in the PDCCH signal based on the communication format used between the base station and a terminal, the number of base station antennas (M) (nonnegative number), the number of terminal antennas (N) (nonnegative number), the bandwidth of the downstream band, and the bandwidth of the upstream band. Specifically, the control unit determines it is unnecessary to adjust the aforementioned data size when the selected communication format is first established between multiple antennas and when where there are multiple for one of M and N and only one for the other. The quality of downstream assignment control data is prevented from degrading, while preventing the number of blind determinations from increasing on the receiving side of the downstream control channel signal.

公开(公告)号：US20180070342A1

公开(公告)日：2018-03-08

申请号：US15812283

申请日：2017-11-14

Applicant: Sun Patent Trust

Inventor： Masayuki HOSHINO ,  Akihiko NISHIO ,  Seigo NAKAO ,  Daichi IMAMURA

IPC: H04W72/04 ,  H04W72/12 ,  H04B7/04 ,  H04L25/02 ,  H04L5/00 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04L1/20 ,  H04L1/18

CPC classification number: H04W72/044 ,  H04B7/0486 ,  H04B7/0626 ,  H04B7/0632 ,  H04L1/0026 ,  H04L1/06 ,  H04L1/1829 ,  H04L1/20 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/006 ,  H04L5/0073 ,  H04L5/0082 ,  H04L5/0094 ,  H04L25/0224 ,  H04W72/0406 ,  H04W72/1215

Abstract: Where first and second reference signals for a first and second communication system, respectively, are transmitted, resources that affect a reception apparatus compatible only with the first communication system can be minimized, and the throughput can be prevented from being deteriorated. As resources for a reference signal CSI-RS for LTE-A, last half symbols in a time direction of a resource unit RB/Sub-frame defined in a frequency-time domain are used, and the CSI-RS is allocated in a position up to the last two symbols or in the last symbol, or the like, of a particular RB/Sub-frame and transmitted when a reference signal 4RS for LTE is transmitted to a reception apparatus in addition to transmitting CSI-RS for LTE-A. The reception apparatus receives CSI-RS allocated in the last half symbol of RB/Sub-frame based on CSI-RS allocation information, measures channel quality by using this CSI-RS, and transmits and reports feedback information.