Sharp Kabushiki Kaisha Corporation

National Institute of Information and Communications Technology, Incorporated

Osaka University

Fg Innovation Company Limited

Hideo Nanba

Yasuhiro Hamaguchi

Shimpei To

Hiroshi Harada

Seiichi Sampei

Masafumi Moriyama

Osamu Nakamura

Hiromichi Tomeba

Ryota Yamada

Seiji Sato

Atsushi Shirakawa

Yoshitoshi Shoji

According to the present invention, transmission is efficiently and repeatedly performed within a slot. The number of repetitions in the slot is calculated using OFDM symbol allocation in a slot notified using a predetermined field during RRC signaling or DCI formatting and the number of divisions in the slot notified by the RRC signaling (or the number of OFDM symbols serving as repetition unit). When the calculated number of repetitions does not satisfy a predetermined condition, repeated transmission is not performed.

Method for wireless communication and terminal device thereof

The present disclosure includes a control unit that performs an uplink (UL) data transmission setting according to a radio resource control (RRC) message and a transmitting unit that transmits UL data according to the UL data transmission setting. The RRC message includes setting information of a plurality of configured UL grants (CGs). The setting information includes at least first and second CGs for each of at least one bandwidth part (BWP). The setting information further includes setting information related to transmission intervals for the first and second CGs. The control unit sets at least the first and second CGs for each BWP according to the setting information. The transmitting unit, when at least a part of the transmission interval of the first and second CGs overlap each other, interrupts UL data transmission of the first CG to perform UL data transmission of the second CG.

Terminal device

A base station apparatus provided with a function of performing communication using multiple beams implements appropriate beamforming while reducing interference power, thereby communication quality becomes stable and frequency efficiency or throughput is improved. The base station apparatus according to the present invention is a base station apparatus for communicating with a terminal apparatus, the base station apparatus including: a transmitter configured to transmit a synchronization signal block including a synchronization signal in a prescribed transmission window; and a controller configured to configure a size of the prescribed transmission window in which the synchronization signal block is transmitted, in which the transmitter notifies the terminal apparatus of information associated with QCL between two of the synchronization signal blocks transmitted in the prescribed transmission window.

Transmission and reception of synchronization signal blocks in a wireless network

An apparatus generating a packet of signals, a number of preamble signals of a preamble portion for each of a number of radio transmission units, and a number of data signals of a data portion, wherein a phase rotation in frequency domain is equal to a time shift in time domain is applied to each symbol of the number of preamble signals separately, the same phase rotation is applied to each symbol separately, the amount of the phase rotation is different for each preamble signal and each data signal, the amount of the phase rotation of one of the number of data signals and one of the number of preamble signals is both zero, and the amount of the phase rotation is equal between one of the preamble signals and one of the data signals for the same radio transmission unit.

Communication device

Improving the accuracy of estimation of channel responses in receiving signals from a plurality of antennas is disclosed. A transmitting device of a base station includes a preamble A generating unit, a preamble B generating unit, phase rotating unitsand, multiplexing unitsand, an forward error correction coding unit, an S/P converting unit, a mapping unit, a changeover switch, IDFT (or IFFT) unitsand, P/S converting unitsand, GI (Guard Interval) inserting unitsand, D/A converting unitsand, radio transmitting unitsandand antenna unitsand. In the preamble A generating unitand the preamble B generating unit, a preamble A and a preamble B (see the packet format in FIG.) are generated, respectively. The preamble A is outputted to the multiplexing unitsand, while the preamble B is outputted to the phase rotating unitsand. The phase rotating unitsandto which the preamble B has been inputted give continuous phase rotation to subcarriers of the preamble B. In the transmitting device of the base station according to this embodiment, the phase rotating unitdoes not give phase rotation, but only the phase rotating unitgives phase rotation to the preamble B.

Allocation of transmission power is carried out adaptively without affecting adjacent cells. Included are a reception part that receives information from a mobile station apparatus, a transmission power determination part that determines transmission power when transmitting a wireless signal to a mobile station apparatus based on the received information, an acquisition part that acquires information about communication environment in each time channel or each frequency channel from the received information, a scheduling part that identified a time channel or frequency channel the relationship of which between transmission power and communication environment satisfies the condition for allocation and allocates transmission data and transmission power for transmission to a mobile station apparatus to a communication slot in the time channel or frequency channel, and a transmission part that transmits a wireless signal using the communication slot to which the transmission data and the determined transmission power have been allocated.

Base station apparatus, wireless communication system, and wireless transmission method

The invention provides precise estimation of a channel response and correct demodulation of an information signal even in the circumstance of being likely suffering interference. The invention includes an error correcting code unit, an S/P converting unit, a mapping unit, an IDFT (Inverse Discrete Fourier Transform) unit (IFFT: Inverse Fast Fourier Transform can be used), a P/S converting unit, a GI (Guard Interval) inserting unit, preamble (A, B, B) storage selecting units-and-, switch units-and-, D/A converting units-and-, radio units-and-and antenna units-and-

Radio communication device

The invention provides a method of managing a network in which the configuration of communication devices can be freely modified and each terminal can operate as a hub terminal for controlling the network, and a communication device. Following network management information transmitted by the hub terminal periodically, each leaf terminal transmits terminal synchronization information and then transmits data. The network management information includes network ID retained by the hub terminal, station ID information in the form of information indicating the use/non-use of station ID in the network, and a terminal synchronization information transmission request which designates the leaf terminal which should transmit a terminal synchronizing signal. The leaf terminals designated by the terminal synchronization information transmission request transmit the individual terminal synchronization information sequentially following the network management information.

Method of managing communication network, and communication device

A radio communication apparatus and a radio communication apparatus can reduce a communication bandwidth required to manage topology maps, can control transmission and reception timings of information for managing the topology maps, and can prevent the information from being broken by collision. The radio communication apparatus includes means () for requesting topology map data which is bit field data formed on the basis of a communication state between the terminals and the constituent terminal list and which indicates the communication state between the terminals at the present viewed from the corresponding terminal from the designated terminal, means () receiving the request of the topology map data, means () for deciding whether the request of the topology map data is for its own terminal or not, means () for, when the request of the topology map data is for its own terminal, transmitting the topology map data viewed from its own terminal, and means () for, when the request of the topology map data is not for its own terminal, receiving topology map data transmitted from another terminal from which topology map data is requested to reflect the topology map data on the communication state between the terminals stored in its own terminal.

Growing community of inventors

Chiba, Japan

Hideo Nanba