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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
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.
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32.发明申请公开(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
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.
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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.
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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
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.
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公开(公告)号：US20180115987A1
公开(公告)日：2018-04-26
申请号：US15850479
申请日：2017-12-21
Applicant: Sun Patent Trust
Inventor： Yoshihiko OGAWA , Daichi IMAMURA , Ayako HORIUCHI , Sadaki FUTAGI
CPC classification number: H04W72/1289 , H04L5/0007 , H04L5/0037 , H04L5/006 , H04L5/0085 , H04L5/023 , H04W88/085
Abstract: A radio communication base station device can efficiently obtain a multiuser diversity gain from frequency scheduling while reducing the amount of a reference signal occupying an uplink. In the device, a grouping section divides a plurality of RBs (Resource Blocks) into a plurality of RB groups. An RB group control unit performs a control to change the correspondence relationship between the RBs and the RB groups with time. When the grouping section divides the RBs into the RB groups, the RB control unit performs a control to change a combination of the RBs included in each of the RB groups with time. A scheduling section performs a scheduling of allocating each of a plurality of mobile stations to each of the RBs in each of the RB groups according to the reception quality of the reference signal.
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Patent Agency Ranking
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
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.
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公开(公告)号：US20240372647A1
公开(公告)日：2024-11-07
申请号：US18773103
申请日：2024-07-15
Applicant: Sun Patent Trust
Inventor： Seigo NAKAO , Akihiko NISHIO , Daichi IMAMURA
Abstract: A base station communicates with a terminal, for which an uplink component carrier and downlink component carriers are configured. The base station adjusts a payload size of control information, transmitted in a downlink control channel, based on a basic payload size, and maps the control information onto a search space in at least one of the downlink component carriers. The basic payload size of the control information mapped onto a search space in a primary downlink component carrier is based on a number of information bits obtained from a bandwidth of the primary downlink component carrier, and on a number of information bits obtained from a bandwidth of the uplink component carrier. The basic payload size of the control information mapped onto a search space in a non-primary downlink component carrier is based on a number of information bits obtained from a bandwidth of the non-primary downlink component carrier.
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38.发明公开公开(公告)号：US20240267191A1
公开(公告)日：2024-08-08
申请号：US18637187
申请日：2024-04-16
Applicant: Sun Patent Trust
Inventor： Akihiko NISHIO , Seigo NAKAO , Daichi IMAMURA
IPC: H04L5/00 , H04B7/06 , H04L1/1812 , H04W72/0446 , H04W72/23 , H04W72/54
CPC classification number: H04L5/0057 , H04L1/1812 , H04L5/0028 , H04L5/005 , H04L5/0051 , H04L5/0073 , H04W72/0446 , H04W72/23 , H04B7/0632 , H04L5/0012 , H04L5/0041 , H04L5/0082 , H04W72/54
Abstract: A wireless communication base station apparatus which is able to prevent deterioration in the throughput of LTE terminals even when LTE terminals and LTE+ terminals coexist. In this apparatus, based on the mapping pattern of the reference signals used only in LTE+ terminals, a setting unit sets, in each subframe, the resource block groups where the reference signals used only by the LTE+ terminals are mapped. For symbols mapped to the antennas, an mapping unit maps, to all the resource blocks within one frame, cell specific reference signals used for both LTE terminals and LTE+ terminals. For the symbols mapped to the antennas, the mapping unit maps, to the plurality of resource blocks, of which part of the resource block groups is comprised, in the same subframe within one frame, the cell specific reference signals used only for LTE+ terminals, based on the setting results inputted from the setting unit.
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公开(公告)号：US20240014850A1
公开(公告)日：2024-01-11
申请号：US18471080
申请日：2023-09-20
Applicant: Sun Patent Trust
Inventor： Seigo NAKAO , Hidetoshi SUZUKI , Daichi IMAMURA
IPC: H04B1/7143 , H04B7/024 , H04J11/00 , H04J13/22
CPC classification number: H04B1/7143 , H04B7/024 , H04J11/0053 , H04J13/22
Abstract: A wireless communication terminal apparatus wherein CoMP communication can normally be performed without increasing the overhead of an upstream line control channel. In this apparatus, a spreading unit (214) primarily spreads a response signal by use of a ZAC sequence established by a control unit (209). A spreading unit (217) secondarily spreads the response signal, to which CP has been added, by use of a block-wise spread code sequence established by the control unit (209). The control unit (209) controls, in accordance with sequence numbers and a hopping pattern established therein, the circular shift amount of the ZAC sequence to be used for the primary spread in the spreading unit (214) and the block-wise spread code sequence to be used for the secondary spread in the spreading unit (217). The hopping pattern established in the control unit (209) is a hopping pattern common to a plurality of base stations that CoMP-receive the response signal.
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40.发明公开公开(公告)号：US20230336317A1
公开(公告)日：2023-10-19
申请号：US18340725
申请日：2023-06-23
Applicant: Sun Patent Trust
Inventor： Akihiko NISHIO , Seigo NAKAO , Daichi IMAMURA
IPC: H04L5/00 , H04W72/0446 , H04W72/23 , H04L1/1812
CPC classification number: H04L5/0057 , H04W72/0446 , H04L5/0028 , H04L5/0073 , H04W72/23 , H04L5/005 , H04L5/0051 , H04L1/1812 , H04B7/0632
Abstract: A wireless communication base station apparatus which is able to prevent deterioration in the throughput of LTE terminals even when LTE terminals and LTE+ terminals coexist. In this apparatus, based on the mapping pattern of the reference signals used only in LTE+ terminals, a setting unit sets, in each subframe, the resource block groups where the reference signals used only by the LTE+ terminals are mapped. For symbols mapped to the antennas, an mapping unit maps, to all the resource blocks within one frame, cell specific reference signals used for both LTE terminals and LTE+ terminals. For the symbols mapped to the antennas, the mapping unit maps, to the plurality of resource blocks, of which part of the resource block groups is comprised, in the same subframe within one frame, the cell specific reference signals used only for LTE+ terminals, based on the setting results inputted from the setting unit.
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