Patents by Inventor Xiaoqiu Wang
Xiaoqiu Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10863491Abstract: In a wireless communication system in which when connecting one terminal apparatus to a base station apparatus and another base station apparatus, the other base station apparatus selects a frequency band to be used for control channels transmitted from the terminal apparatus to the other base station apparatus from a plurality of frequency bands usable by the other base station apparatus, and notifies the terminal apparatus of the selected frequency band, the base station apparatus acquires from the terminal apparatus information about radio quality of a signal received from the other base station apparatus for at least one frequency band out of the plurality of frequency bands, extracts a portion of frequency bands out of the plurality of frequency bands based on the acquired information about radio quality, and notifies the other base station apparatus of information representing the portion of frequency bands.Type: GrantFiled: July 16, 2019Date of Patent: December 8, 2020Assignee: KDDI CorporationInventors: Hailan Peng, Toshiaki Yamamoto, Xiaoqiu Wang
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Patent number: 10555353Abstract: A base station device (E-UTRAN) assigns a frequency band unsupported by the base station device as a radio resource usable for terminal-to-terminal communication, and transmits resource information for designating the assigned radio resource to a first terminal device and a second terminal device.Type: GrantFiled: May 11, 2017Date of Patent: February 4, 2020Assignee: KDDI CORPORATIONInventors: Kouichiro Kitagawa, Xiaoqiu Wang, Fumio Watanabe, Yasuhiro Suegara
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Publication number: 20190342881Abstract: In a wireless communication system in which when connecting one terminal apparatus to a base station apparatus and another base station apparatus, the other base station apparatus selects a frequency band to be used for control channels transmitted from the terminal apparatus to the other base station apparatus from a plurality of frequency bands usable by the other base station apparatus, and notifies the terminal apparatus of the selected frequency band, the base station apparatus acquires from the terminal apparatus information about radio quality of a signal received from the other base station apparatus for at least one frequency band out of the plurality of frequency bands, extracts a portion of frequency bands out of the plurality of frequency bands based on the acquired information about radio quality, and notifies the other base station apparatus of information representing the portion of frequency bands.Type: ApplicationFiled: July 16, 2019Publication date: November 7, 2019Inventors: Hailan PENG, Toshiaki YAMAMOTO, Xiaoqiu WANG
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Patent number: 10405302Abstract: In a wireless communication system in which when connecting one terminal apparatus to a base station apparatus and another base station apparatus, the other base station apparatus selects a frequency band to be used for control channels transmitted from the terminal apparatus to the other base station apparatus from a plurality of frequency bands usable by the other base station apparatus, and notifies the terminal apparatus of the selected frequency band, the base station apparatus acquires from the terminal apparatus information about radio quality of a signal received from the other base station apparatus for at least one frequency band out of the plurality of frequency bands, extracts a portion of frequency bands out of the plurality of frequency bands based on the acquired information about radio quality, and notifies the other base station apparatus of information representing the portion of frequency bands.Type: GrantFiled: November 2, 2016Date of Patent: September 3, 2019Assignee: KDDI CORPORATIONInventors: Hailan Peng, Toshiaki Yamamoto, Xiaoqiu Wang
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Patent number: 10154534Abstract: A terminal device includes a wireless communication part configured to wirelessly communicate with base station devices; a link controller configured to establish a link with a primary base station device (PCell) so as to enable a wireless communication via the wireless communication part while establishing a link with a secondary base station device (SCell) so as to enable a wireless communication via the wireless communication part; a primary base station link failure detector configured to detect a radio link failure in the wireless communication with the primary base station device based on the predetermined condition; and a primary base station link failure information transmitter configured to wirelessly transmit the information, concerning the radio link failure with the primary base station device, to the secondary base station device when the primary base station link failure detector detects the radio link failure status.Type: GrantFiled: January 10, 2014Date of Patent: December 11, 2018Assignee: KDDI CorporationInventors: Toshiaki Yamamoto, Takeo Ohseki, Xiaoqiu Wang, Yosuke Akimoto, Satoshi Konishi
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Patent number: 10045344Abstract: In a wireless communication system which can share the same frequency band with time division duplexing (TDD) and frequency division duplexing (FDD), a wireless terminal carries out an FDD downlink reception in a second frequency band overlapping a first frequency band allocated to TDD, thus carrying out reception at the TDD downlink reception timing. Alternatively, a wireless terminal carries out a TDD downlink reception in a second frequency band overlapping a first frequency band allocated to FDD, thus carrying out reception at the FDD downlink reception timing.Type: GrantFiled: August 13, 2014Date of Patent: August 7, 2018Assignee: KDDI CORPORATIONInventors: Makoto Konno, Xiaoqiu Wang, Fumio Watanabe
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Patent number: 9961594Abstract: A terminal device includes a wireless communication unit performing wireless communication; a connection control unit connecting to a first base station device to wirelessly communicate with the first base station device via the wireless communication unit, the first base station serving as a primary, the connection control unit connecting to a second base station device to wirelessly communicate with the second base station device via the wireless communication unit, the second base station device serving as a secondary; a detection unit determining whether quality of wireless communication between the terminal device and the first base station device is in a low state based on a predetermined condition; and a signal transmission control unit wirelessly transmitting via the wireless communication unit, a predetermined signal toward at least either the first or second base station device when the quality is determined to be in the low state by the detection unit.Type: GrantFiled: January 15, 2014Date of Patent: May 1, 2018Assignee: KDDI CorporationInventors: Toshiaki Yamamoto, Takeo Ohseki, Xiaoqiu Wang, Yosuke Akimoto, Satoshi Konishi
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Publication number: 20170251510Abstract: A base station device (E-UTRAN) assigns a frequency band unsupported by the base station device as a radio resource usable for terminal-to-terminal communication, and transmits resource information for designating the assigned radio resource to a first terminal device and a second terminal device.Type: ApplicationFiled: May 11, 2017Publication date: August 31, 2017Inventors: Kouichiro Kitagawa, Xiaoqiu Wang, Fumio Watanabe, Yasuhiro Suegara
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Publication number: 20170079029Abstract: In a wireless communication system in which when connecting one terminal apparatus to a base station apparatus and another base station apparatus, the other base station apparatus selects a frequency band to be used for control channels transmitted from the terminal apparatus to the other base station apparatus from a plurality of frequency bands usable by the other base station apparatus, and notifies the terminal apparatus of the selected frequency band, the base station apparatus acquires from the terminal apparatus information about radio quality of a signal received from the other base station apparatus for at least one frequency band out of the plurality of frequency bands, extracts a portion of frequency bands out of the plurality of frequency bands based on the acquired information about radio quality, and notifies the other base station apparatus of information representing the portion of frequency bands.Type: ApplicationFiled: November 2, 2016Publication date: March 16, 2017Inventors: Hailan PENG, Toshiaki YAMAMOTO, Xiaoqiu WANG
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Patent number: 9565574Abstract: A communication control apparatus, in a wireless communication system having an area in which coverage areas of a macro cell base station and a small cell base station using different frequency bands overlap, includes a storage unit and a control unit. The storage unit stores small cell base station information indicating whether the small cell base station is present within a coverage area of a macro cell base station. The control unit instructs a radio terminal apparatus present within the coverage area of the macro cell base station to perform quality measurement in a frequency band of the small cell base station when the small cell base station is present within the coverage area of the macro cell base station based on the small cell base station information.Type: GrantFiled: January 16, 2014Date of Patent: February 7, 2017Assignee: KDDI CORPORATIONInventors: Satoshi Konishi, Toshiaki Yamamoto, Xiaoqiu Wang
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Patent number: 9510336Abstract: A wireless communication system includes an upper transmission station and a lower transmission station, each serving as a transmission station, a terminal serving as a reception station. The upper transmission station allocates a downlink control channel for each terminal to part of a predetermined data-channel region ascribed to the lower transmission station based on a demodulation reference signal for each transmission station. Based on the allocation result, the lower transmission station allocates the downlink control channel for each terminal, which is disposed at art of the data-channel region thereof. The terminal decodes the downlink control channel based on the demodulation reference signal.Type: GrantFiled: March 8, 2013Date of Patent: November 29, 2016Assignee: KDDI CORPORATIONInventors: Xiaoqiu Wang, Yuji Ikeda, Satoshi Konishi
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Publication number: 20160165609Abstract: In a wireless communication system which can share the same frequency band with time division duplexing (TDD) and frequency division duplexing (FDD), a wireless terminal carries out an FDD downlink reception in a second frequency band overlapping a first frequency band allocated to TDD, thus carrying out reception at the TDD downlink reception timing. Alternatively, a wireless terminal carries out a TDD downlink reception in a second frequency band overlapping a first frequency band allocated to FDD, thus carrying out reception at the FDD downlink reception timing.Type: ApplicationFiled: August 13, 2014Publication date: June 9, 2016Applicant: KDDI CORPORATIONInventors: Makoto KONNO, Xiaoqiu WANG, Fumio WATANABE
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Publication number: 20160095028Abstract: In a wireless communication system including a wireless terminal device wirelessly connectible to both a macro-cell base station and a small-cell base station, all the user-plane signals destined for the wireless terminal device are transmitted to the small-cell base station; a VoIP signal among the user-plane signals destined for the wireless terminal device is transmitted to the macro-cell base station; the VoIP signal is wirelessly transmitted from the macro-cell base station to the wireless terminal device; any user-plane signal, among the user-plane signals destined for the wireless terminal device, other than the VoIP signal is wirelessly transmitted from the small-cell base station to the wireless terminal device.Type: ApplicationFiled: May 7, 2014Publication date: March 31, 2016Applicant: KDDI CORPORATIONInventors: Xiaoqiu WANG, Toshiaki YAMAMOTO, Takeo OHSEKI, Yosuke AKIMOTO, Satoshi KONISHI
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Publication number: 20150358833Abstract: A communication control apparatus in a wireless communication system having an area in which coverage areas of a macro cell base station and a small cell base station using different frequency bands overlap includes a storage unit configured to store small cell base station information indicating whether the small cell base station is present within the coverage area of the macro cell base station, and a control unit configured to instruct a radio terminal apparatus present within the coverage area of the macro cell base station to perform quality measurement in a frequency band of the small cell base station when the small cell base station is present within the coverage area of the macro cell base station based on the small cell base station information.Type: ApplicationFiled: January 16, 2014Publication date: December 10, 2015Inventors: Satoshi KONISHI, Toshiaki YAMAMOTO, Xiaoqiu WANG
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Publication number: 20150358863Abstract: A terminal device includes a wireless communication unit performing wireless communication; a connection control unit connecting to a first base station device to wirelessly communicate with the first base station device via the wireless communication unit, the first base station serving as a primary, the connection control unit connecting to a second base station device to wirelessly communicate with the second base station device via the wireless communication unit, the second base station device serving as a secondary; a detection unit determining whether quality of wireless communication between the terminal device and the first base station device is in a low state based on a predetermined condition; and a signal transmission control unit wirelessly transmitting via the wireless communication unit, a predetermined signal toward at least either the first or second base station device when the quality is determined to be in the low state by the detection unit.Type: ApplicationFiled: January 15, 2014Publication date: December 10, 2015Applicant: KDDI CORPORATIONInventors: Toshiaki YAMAMOTO, Takeo OHSEKI, Xiaoqiu WANG, Yosuke AKIMOTO, Satoshi KONISHI
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Publication number: 20150359031Abstract: A terminal device includes a wireless communication part configured to wirelessly communicate with base station devices; a link controller configured to establish a link with a primary base station device (PCell) so as to enable a wireless communication via the wireless communication part while establishing a link with a secondary base station device (SCell) so as to enable a wireless communication via the wireless communication part; a primary base station link failure detector configured to detect a radio link failure in the wireless communication with the primary base station device based on the predetermined condition; and a primary base station link failure information transmitter configured to wirelessly transmit the information, concerning the radio link failure with the primary base station device, to the secondary base station device when the primary base station link failure detector detects the radio link failure status.Type: ApplicationFiled: January 10, 2014Publication date: December 10, 2015Applicant: KDDI CORPORATIONInventors: Toshiaki YAMAMOTO, Takeo OHSEKI, Xiaoqiu WANG, Yosuke AKIMOTO, Satoshi KONISHI
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Publication number: 20150359030Abstract: A terminal device includes a wireless communication unit performing wireless communication; a connection control unit connecting to a first base station device to wirelessly communicate with the first base station device via the wireless communication unit, the first base station device serving as a primary, the connection control unit connecting to a second base station device to wirelessly communicate with the second base station device via the wireless communication unit, the second base station device serving as a secondary; and a first detection unit determining whether a state of wireless communication between the terminal device and the first base station device is in a disconnected state based on a predetermined condition, and if so, the connection control unit reconnects between the terminal device and the second base station device, and such that the second base station device serves as a primary base station device.Type: ApplicationFiled: January 15, 2014Publication date: December 10, 2015Applicant: KDDI CORPORATIONInventors: Toshiaki YAMAMOTO, Takeo OHSEKI, Xiaoqiu WANG, Yosuke AKIMOTO, Satoshi KONISHI
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Publication number: 20150029976Abstract: A wireless communication system includes an upper transmission station and a lower transmission station, each serving as a transmission station, a terminal serving as a reception station. The upper transmission station allocates a downlink control channel for each terminal to part of a predetermined data-channel region ascribed to the lower transmission station based on a demodulation reference signal for each transmission station. Based on the allocation result, the lower transmission station allocates the downlink control channel for each terminal, which is disposed at art of the data-channel region thereof. The terminal decodes the downlink control channel based on the demodulation reference signal.Type: ApplicationFiled: March 8, 2013Publication date: January 29, 2015Applicant: KDDI CORPORATIONInventors: Xiaoqiu Wang, Yuji Ikeda, Satoshi Konishi
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Patent number: 8830938Abstract: Provided is a base station apparatus that employs a dynamic scheduler mode which performs wireless resource allocation for each subframe and applies a result of the allocation to the corresponding subframe, or a continuous transmission scheduler mode which performs wireless resource allocation for each subframe appearing periodically based on a period P and applies a result of the allocation for the relevant subframe to P continuous subframes from a subframe n to a subframe n+P?1. The base station apparatus includes a terminal communication device that communicates continuous transmission application ON/OFF information, which indicates whether or not the continuous transmission scheduler mode is employed, and continuous transmission period information, which indicates a period of continuous transmission scheduling according to the continuous transmission scheduler mode, to a terminal.Type: GrantFiled: February 29, 2012Date of Patent: September 9, 2014Assignee: KDDI CorporationInventors: Xiaoqiu Wang, Noriaki Miyazaki, Satoshi Konishi
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Patent number: 8737335Abstract: A reference signal transmission scheduling device, which performs scheduling on uplink transmission of a reference signal (SRS) from a mobile terminal to a base station in a wireless communication system, is designed to appropriately allocate an SRS transmission resource to the mobile terminal in consideration of the current circumstances of the mobile terminal. Herein, the maximum value of an SRS bandwidth is calculated based on the maximum transmission-enabled power of the mobile terminal, while the minimum value of the SRS bandwidth is calculated based on the mobility of the mobile terminal. Additionally, the SRS bandwidth, which is actually used by the mobile terminal subjected to SRS transmission resource allocation, is determined within the range between the maximum value and the minimum value of the SRS bandwidth.Type: GrantFiled: June 14, 2010Date of Patent: May 27, 2014Assignee: KDDI CorporationInventors: Satoshi Konishi, Xiaoqiu Wang, Toshihiko Komine