公开(公告)号：US20230013540A1

公开(公告)日：2023-01-19

申请号：US17955420

申请日：2022-09-28

Applicant: SUN PATENT TRUST

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

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

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：US20220240298A1

公开(公告)日：2022-07-28

申请号：US17718154

申请日：2022-04-11

Applicant: Sun Patent Trust

Inventor： Yoshihiko OGAWA ,  Akihiko NISHIO ,  Daichi IMAMURA ,  Seigo NAKAO ,  Masayuki HOSHINO ,  Takashi IWAI ,  Sadaki FUTAGI

IPC: H04W72/12 ,  H04L27/26 ,  H04L1/00 ,  H04W72/04 ,  H04L5/00

Abstract: Communication apparatuses and methods reduce the amount of signaling while maintaining a high scheduling gain. A determination unit stores a correspondence between the number of code words and the number of clusters to reduce the maximum value for the number of clusters allocated to each terminal as the number of code words increases, and thus determines the maximum value for the number of clusters based on the number of code words acquired. Based on the number of code words for a transmission signal from a terminal, an estimated value for the reception quality that is output by an estimation unit, and the maximum value for the number of clusters that is output by the determination unit, a scheduling unit schedules the allocation of the transmission signal transmitted by each terminal to a transmission band frequency (frequency resource) so as not to exceed the maximum value for the number of clusters.

公开(公告)号：US20220094489A1

公开(公告)日：2022-03-24

申请号：US17539703

申请日：2021-12-01

Applicant: Sun Patent Trust

Inventor： Seigo NAKAO ,  Akihiko NISHIO ,  Daichi IMAMURA

IPC: H04L5/00 ,  H04W28/06 ,  H04B7/0456 ,  H04B7/06 ,  H04W72/04

Abstract: Disclosed are a wireless base station, wireless terminal, and channel signal formation method that can prevent the quality of downstream assignment control data from degrading, while preventing the number of blind determinations from increasing on the wireless terminal on the receiving side of the downstream control channel signal. In a base station (100), a control unit (101) and a data size regulation unit (103) control the data size of downstream assignment control data and upstream assignment control data contained in the PDCCH signal based on the communication format used between the base station (100) and a terminal (200), the number of antennas (M) (nonnegative number) on the base station (100), the number of antennas (N) (nonnegative number) on the terminal (200), the bandwidth of the downstream band, and the bandwidth of the upstream band. Specifically, the control unit (101) 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.

公开(公告)号：US20200092060A1

公开(公告)日：2020-03-19

申请号：US16690688

申请日：2019-11-21

Applicant: Sun Patent Trust

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

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

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：US20190305873A1

公开(公告)日：2019-10-03

申请号：US16442852

申请日：2019-06-17

Applicant: SUN PATENT TRUST

Inventor： Akihiko NISHIO ,  Hidetoshi SUZUKI ,  Christian WENGERTER

IPC: H04L1/00 ,  H04L5/00 ,  H04L1/04 ,  H04W52/02

Abstract: A radio communication base station device which can reduce the number of judgment times for a control signal in a mobile station, thereby suppressing power consumption by the mobile station. The radio communication base station device (100) includes: a mapping setting unit (122) which sets a mapping method in a mapping unit (102); the mapping unit (102) which maps a control signal to respective mobile stations to any of sub carriers constituting the OFDM symbol according to the mapping method set by the mapping setting unit (122);an MCS setting unit (121) which references a mapping table in which correlation between a plurality of MCS having different MCS levels and mapping methods is set according to the judgment result of the mapping setting unit (122) and sets MCS in encoding/modulation units (101-1 to 101-n).

公开(公告)号：US20190150153A1

公开(公告)日：2019-05-16

申请号：US16245944

申请日：2019-01-11

Applicant: Sun Patent Trust

Inventor： Akihiko NISHIO ,  Seigo NAKAO

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

CPC classification number: H04W72/0453 ,  H04L1/0025 ,  H04L1/0038 ,  H04L5/0007 ,  H04L5/003 ,  H04L5/0053 ,  H04L5/0055 ,  H04W72/042

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：US20190098557A1

公开(公告)日：2019-03-28

申请号：US16206120

申请日：2018-11-30

Applicant: Sun Patent Trust

Inventor： Yoshihiko OGAWA ,  Seigo NAKAO ,  Akihiko NISHIO ,  Masayuki HOSHINO ,  Daichi IMAMURA ,  Atsushi SUMASU

IPC: H04W48/02 ,  H04L1/00 ,  H04L1/18 ,  H04L5/00 ,  H04W48/12 ,  H04L1/16 ,  H04B7/0413 ,  H04W28/04

CPC classification number: H04W48/02 ,  H04B7/0413 ,  H04L1/0026 ,  H04L1/0031 ,  H04L1/1671 ,  H04L1/1861 ,  H04L1/1893 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0055 ,  H04L5/0057 ,  H04W28/04 ,  H04W48/12

Abstract: A terminal and a communication method thereof whereby, even in a case of employing an asymmetric carrier aggregation system and further employing a MIMO transmission method for upstream channels, the error characteristic of control information can be prevented from being degraded. In the terminal, a transport signal forming unit forms transport signals by arranging, based on an arrangement rule, ACK/NACK and CQI in a plurality of layers. According to the arrangement rule, an error detection result is arranged, on a priority basis, in a layer that is different from a layer in which the channel quality information is arranged. In this way, the puncturing of CQI using ACK/NACK can be minimized, with the result that the error characteristic of control information can be prevented from being degraded.

公开(公告)号：US20180103463A1

公开(公告)日：2018-04-12

申请号：US15841012

申请日：2017-12-13

Applicant: Sun Patent Trust

Inventor： Akihiko NISHIO ,  Toru OIZUMI ,  Ayako HORIUCHI

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

CPC classification number: H04W72/0406 ,  H04L1/0026 ,  H04L1/1671 ,  H04L5/001 ,  H04L5/0055 ,  H04L5/0057

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：US20170295577A1

公开(公告)日：2017-10-12

申请号：US15634376

申请日：2017-06-27

Applicant: Sun Patent Trust

Inventor： Akihiko NISHIO ,  Seigo NAKAO

IPC: H04W72/04 ,  H04L5/00

CPC classification number: H04W72/0453 ,  H04L1/0025 ,  H04L1/0038 ,  H04L5/0007 ,  H04L5/003 ,  H04L5/0053 ,  H04L5/0055 ,  H04W72/042

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：US20170187495A1

公开(公告)日：2017-06-29

申请号：US15461061

申请日：2017-03-16

Applicant: Sun Patent Trust

Inventor： Yoshihiko OGAWA ,  Seigo NAKAO ,  Akihiko NISHIO ,  Masayuki HOSHINO ,  Daichi IMAMURA ,  Atsushi SUMASU

IPC: H04L1/16 ,  H04L5/00 ,  H04L1/00

CPC classification number: H04W48/02 ,  H04B7/0413 ,  H04L1/0026 ,  H04L1/0031 ,  H04L1/1671 ,  H04L1/1861 ,  H04L1/1893 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0055 ,  H04L5/0057 ,  H04W28/04 ,  H04W48/12

Abstract: A terminal and a communication method thereof whereby, even in a case of employing an asymmetric carrier aggregation system and further employing a MIMO transmission method for upstream channels, the error characteristic of control information can be prevented from being degraded. In the terminal, a transport signal forming unit forms transport signals by arranging, based on an arrangement rule, ACK/NACK and CQI in a plurality of layers. According to the arrangement rule, an error detection result is arranged, on a priority basis, in a layer that is different from a layer in which the channel quality information is arranged. In this way, the puncturing of CQI using ACK/NACK can be minimized, with the result that the error characteristic of control information can be prevented from being degraded.