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    RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD
    2.
    发明公开
    RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD 审中-公开

    公开(公告)号：EP4247110A3

    公开(公告)日：2023-11-22

    申请号：EP23190528.2

    申请日：2016-08-15

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： KUDO, Riichi ,  ABEYSEKERA, Hirantha Sithira ,  MATSUI, Munehiro ,  SHINOHARA, Shoko ,  TAKATORI, Yasushi ,  ICHIKAWA, Takeo ,  MIZOGUCHI, Masato

    IPC分类号： H04W74/08 ,  H04W72/12 ,  H04W74/04 ,  H04W84/12

    摘要： Provided is a wireless communication system in which, based on a random access scheme, a transmission opportunity (TXOP) acquired by a wireless access point is granted to a wireless station when performing uplink data transmission from the wireless station to the wireless access point and the TXOP acquired by the wireless station is granted to the wireless access point when performing downlink data transmission from the wireless access point to the wireless station, the system includes a scheduling unit for TXOP granting determining one or more wireless stations having a quality of an uplink data transmission lower than a prescribed value as TXOP responders to which the wireless access point grants the TXOP, and determining one or more wireless stations having a quality of a downlink data transmission lower than the prescribed value as TXOP holders which grant the TXOP to the wireless access point.

    RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD
    6.
    发明公开
    RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD 审中-公开

    公开(公告)号：EP3340719A1

    公开(公告)日：2018-06-27

    申请号：EP16839136.5

    申请日：2016-08-15

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： KUDO, Riichi ,  ABEYSEKERA, Hirantha Sithira ,  MATSUI, Munehiro ,  ICHIKAWA, Takeo ,  TAKATORI, Yasushi ,  MIZOGUCHI, Masato

    IPC分类号： H04W72/12 ,  H04W28/14 ,  H04W74/00 ,  H04W84/12

    摘要： Provided is a wireless communication system which performs downlink data transmission based on a transmission opportunity acquired by a wireless access point (hereinafter referred to as TXOP access) or a transmission opportunity acquired by a wireless station and granted to the wireless access point (hereinafter referred to as RXOP access), when performing the downlink data transmission from the wireless access point to the wireless station based on a random access scheme, in which the wireless access point includes a control unit performing, on a transmission buffer which sequentially stores data frames to be transmitted for each of wireless stations, processing which lowers an order of priority of the data frames which are to be destined for the wireless station A by the TXOP access at the transmission buffer according to a transmission status of the data frames destined for a wireless station A by the RXOP access.

    SIGNAL GENERATION CIRCUIT, OPTICAL SIGNAL TRANSMITTER, SIGNAL RECEPTION CIRCUIT, OPTICAL SIGNAL SYNCHRONIZATION ESTABLISHMENT METHOD, AND OPTICAL SIGNAL SYNCHRONIZATION SYSTEM
    7.
    发明公开
    SIGNAL GENERATION CIRCUIT, OPTICAL SIGNAL TRANSMITTER, SIGNAL RECEPTION CIRCUIT, OPTICAL SIGNAL SYNCHRONIZATION ESTABLISHMENT METHOD, AND OPTICAL SIGNAL SYNCHRONIZATION SYSTEM 有权
    信号产生电路支持光信号，信号接收电路，方法同步光学信号和系统同步的光信号

    公开(公告)号：EP2434665A1

    公开(公告)日：2012-03-28

    申请号：EP10777559.5

    申请日：2010-05-18

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： ISHIHARA, Koichi ,  KOBAYASHI, Takayuki ,  KUDO, Riichi ,  TAKATORI, Yasushi ,  MATSUI, Munehiro ,  MIZOGUCHI, Masato ,  SANO, Akihide ,  YAMANAKA, Shogo ,  YAMAZAKI, Etsushi ,  MIYAMOTO, Yutaka ,  YOSHIDA, Eiji ,  NAKAGAWA, Tadao

    IPC分类号： H04B10/04 ,  H04B10/02 ,  H04B10/06 ,  H04B10/14 ,  H04B10/18 ,  H04B10/26 ,  H04B10/28 ,  H04L7/08

    CPC分类号： H04B10/50 ,  H04B10/07951 ,  H04B10/2513 ,  H04B10/556 ,  H04B10/616 ,  H04B10/6161 ,  H04L7/027

    摘要： To enable signal position detection, frequency offset compensation, clock offset compensation, and chromatic dispersion amount estimation in a communication system based on coherent detection using an optical signal, even on a signal having a great offset in an arrival time depending on a frequency due to chromatic dispersion. An optical signal transmitting apparatus generates specific frequency band signals having power concentrated on two or more specific frequencies and transmits a signal including the specific frequency band signals. An optical signal receiving apparatus converts a received signal into a digital signal, detects positions of the specific frequency band signals from the converted digital signal, estimates frequency positions of the detected specific frequency band signals, and detects a frequency offset between an optical signal receiving apparatus and an optical signal transmitting apparatus. Moreover, the optical signal receiving apparatus detects a clock offset between the optical signal receiving apparatus and the optical signal transmitting apparatus from an interval between the estimated frequency positions of the specific frequency band signals. Furthermore, the optical signal receiving apparatus estimates temporal positions of the detected specific frequency band signals and detects a chromatic dispersion amount from a difference between the temporal positions of the specific frequency band signals corresponding to different frequencies.

    摘要翻译： 基于使用光学信号相干检测使得能够在通信系统中信号的位置检测，频率偏移补偿，时钟偏移补偿，而色散量估计，即使在信号具有大的到达时间偏移依赖于频率由于 色散。 一种光信号发送装置基因率具有功率的特定频带的信号集中在两个或更多个特定频率，并发送一个信号包括特定频带信号。 的光信号接收装置接收到的信号转换成数字信号转换，检测从转换后的数字信号的特定频带信号的位置，估计检测到的特定频带信号的频率位置，并检测频率在光信号接收装置之间的偏移 和光信号发送装置。 更完了，光信号接收装置检测一个时钟光信号接收装置，并从所述特定频带的信号的估计的频率位置之间的间隔的光信号发送装置之间的时间偏移。 进一步地，光信号接收装置估计检测到的特定频带信号的时间位置和色散从特定频带信号对应于不同频率的时间位置之间的差来检测量。

    RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD
    8.
    发明公开
    RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD 审中-公开

    公开(公告)号：EP4247110A2

    公开(公告)日：2023-09-20

    申请号：EP23190528.2

    申请日：2016-08-15

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： KUDO, Riichi ,  ABEYSEKERA, Hirantha Sithira ,  MATSUI, Munehiro ,  SHINOHARA, Shoko ,  TAKATORI, Yasushi ,  ICHIKAWA, Takeo ,  MIZOGUCHI, Masato

    IPC分类号： H04W84/12

    摘要： Provided is a wireless communication system in which, based on a random access scheme, a transmission opportunity (TXOP) acquired by a wireless access point is granted to a wireless station when performing uplink data transmission from the wireless station to the wireless access point and the TXOP acquired by the wireless station is granted to the wireless access point when performing downlink data transmission from the wireless access point to the wireless station, the system includes a scheduling unit for TXOP granting determining one or more wireless stations having a quality of an uplink data transmission lower than a prescribed value as TXOP responders to which the wireless access point grants the TXOP, and determining one or more wireless stations having a quality of a downlink data transmission lower than the prescribed value as TXOP holders which grant the TXOP to the wireless access point.