Ntt Docomo, Inc.

Nec Corporation

Ntt Mobile Communications Network, Inc.

Fujitsu Corporation

Sony Corporation

Denso Corporation

Panasonic Intellectual Property Corporation of America

Kenichi Higuchi

Mamoru Sawahashi

Yoshihisa Kishiyama

Nobuhiko Miki

Motohiro Tanno

Hiroyuki Atarashi

Teruo Kawamura

Yoshiaki Ofuji

Hiroyuki Ishii

Satoshi Nagata

Noriyuki Maeda

Hidekazu Taoka

Akihito Morimoto

Hiroyuki Kawai

Toshifumi Sato

Junichiro Kawamoto

Yukiko Hanada

Lan Chen

Sadayuki Abeta

Daisuke Nishikawa

Anil Umesh

Hiroyuki Seki

Shousei Yoshida

Anass Benjebbour

Fumiyuki Adachi

Akihiro Higashi

Jingxiu Liu

Yoshinori Miki

Masayuki Hoshino

Takahiro Asai

Minami Ishii

Yuichi Kakishima

Yoshikazu Kakura

Yasuaki Yuda

Tsuyoshi Shimomura

Seizo Onoe

Dai Kimura

Xiaoming She

Yoshiaki Inada

Naoto Okubo

Masayuki Kimata

Naoto Ookubo

Takumi Ito

Hidehiro Ando

Koji Ohno

Shinya Tanaka

Yong Bai

Xiaoming Dai

Zhengang Pan

Yuuya Saitou

Taisuke Ihara

Hidehiro Andou

Yoshihisa Kiskiyama

Takashi Kataoka

The object is achieved by providing a base station apparatus for performing time and frequency scheduling in uplink packet access with: an interference amount measurement part configured to measure an uplink interference amount for each interference amount measurement unit which comprises a predetermined period and a predetermined number of frequency blocks; an interference amount determination part configured to determine whether the uplink interference amount satisfies a predetermined condition; and an overload indicator reporting part configured to report an overload indicator to a neighboring cell when the predetermined condition is satisfied.

Base station apparatus and communication control method

A user terminal includes a receiving section that receives a signal subjected to multiplexing in a power dimension in a given layer and that receives information about the multiplexing in the power dimension; and a signal processing section that demodulates a signal for the user terminal from the multiplexed signal based on the information about the multiplexing in the power dimension.

Radio base station, user terminal, radio communication method and radio communication system

A base station apparatus is used in a mobile communication system in which at least a shared data channel is transmitted by an orthogonal modulation scheme using an I-channel and a Q-channel. The base station apparatus includes a providing unit providing Acknowledgement/Non-Acknowledgement information indicating whether retransmission of a signal received in uplink is required; a mapping unit mapping a number of multiplexed users of the Acknowledgement/Non-Acknowledgement information to the I-channel or the Q-channel based on a predetermined mapping table; and a reporting unit reporting the Acknowledgement/Non-Acknowledgement information to the respective users. The mapping table indicates that, when the number of the multiplexed users is equal to or less than a predetermined number, the Acknowledgement/Non-Acknowledgement information is associated with the I-channel or the Q-channel, and otherwise, the Acknowledgement/Non-Acknowledgement information is associated with the I-channel and the Q-channel.

Mobile communication system, base station apparatus, user equipment, and method

The present invention is designed to improve spectral efficiency in a radio communication system which can use non-orthogonal multiple access (NOMA). Steps are provided in which a radio base station configures one of a plurality of transmission mode including a first transmission mode, which groups a plurality of transmission methods including a transmission method to employ non-orthogonal multiple access (NOMA) and multiple-user multiple-input and multiple-output (MU-MIMO), and a second transmission mode, which groups a plurality of transmission methods including a transmission method to employ this NOMA and open-loop transmit diversity, and transmits a downlink signal for this user terminal based on the configured transmission mode.

Radio base station, user terminal and radio communication method

A wireless base station transmits first information indicating an allocation policy that determines system performance and second information regarding an allocated bandwidth that is allocated to a wireless terminal in a case where the allocation policy is applied, receives, from each of a plurality of wireless terminals, third information regarding a serving base station candidate and throughput that is achieved in a case where the wireless terminal is connected to the serving base station candidate, and controls, on the basis of the third information, a connection to a wireless terminal having the greatest throughput.

Wireless base station, wireless terminal, and communication control method

A transmission apparatus is provided with radio resource assignment means that assigns radio resources to each physical channel according to a type of the physical channel; and transmission means that transmits information to be transmitted by each physical channel using the assigned radio resources.

Transmission apparatus and radio resource assignment method

One of sequence groups each specifying reference signal sequences for respective radio resource bandwidths is assigned to a base station and a different one of the sequence groups is assigned to a neighboring cell. The base station includes a scheduler configured to allocate radio resources; a reporting unit configured to report the allocated radio resources and a cyclic shift amount to a mobile station; and a demodulating unit configured to demodulate a signal received from the mobile station based on one of the reference signal sequences corresponding to one of the radio resource bandwidths and the cyclic shift amount. Cell reuse is applied to the reference signal sequences to be transmitted using one resource unit, and sequence hopping where different ones of the reference signal sequences are assigned to consecutive subframes is applied to the reference signal sequences to be transmitted using a bandwidth greater than one resource unit.

Base station, mobile station, radio communication system, and communication control method

To obtain a high frequency diversity effect while suppressing inter-code interference in code multiplexing transmission in an OFDM-based radio access scheme, a transmission apparatus is provided with an orthogonal spreading code generating section () that generates different spreading codes based on orthogonal code sequences, a phase rotation giving section () and spreading modulation section () which provide the information symbols or spreading codes with different phase rotation for each symbol sequence and then, spreads the information symbols with the spreading codes for each symbol sequence, and a multiplexing section () that multiplexes spread symbols of different symbol sequences, where the information symbols or the spreading codes are rotated by a phase rotation amount such that overlaps in a signal constellation in polar coordinates of spread symbols for transmitting different information symbols are controlled to within a required range.

Code multiplexing transmission method, transmission apparatus and reception apparatus

Transmitting apparatus and radio resource assignment method

The present technology relates to an A/D converter, a solid-state image pickup device and a method of driving the same, and an electronic apparatus which are capable of reducing power consumption while reducing a circuit size. A comparator compares a reference voltage with an input voltage, the reference voltage having a ramp waveform whose voltage value varies with time, a lower-bit storage element holds a count value in a predetermined count pattern, based on an output signal from the comparator, a Gray code binary conversion circuit converts the count value in the count pattern held by the lower-bit storage element into binary data, and a storing operation control circuit supplies a pulse signal corresponding to the binary data obtained by conversion in the Gray code binary conversion circuit to a lower-bit U/D CNT. The present technology is applicable to, for example, an image sensor storing a count value in a storage element with use of a Gray code or a phase shift code as a clock signal.

A/D converter, solid-state image pickup device and driving method of the same, and electronic apparatus

A base station apparatus in a radio communication system where transmit diversity is applied in uplinks includes a reference signal measurement unit configured to measure a receive level of the reference signal, a switch pitch determination unit configured to determine the antenna switch pitch of transmitting the reference signal based on the receive level measured by the reference signal measurement unit, and a transmitting unit configured to transmit the antenna switch pitch determined by the switch pitch determination unit.

Base station apparatus, user apparatus and communication control method

In a radio communication system, a downlink frequency band includes a plurality of frequency blocks including one or more carrier frequencies, and one or more frequency blocks are used for data transmission to a single user. A radio communication apparatus for use in the communication system has an evaluation unit evaluating the quality of a received signal for each frequency block and storing plurality of stored quality evaluations of the received signal, a comparison unit comparing the plural quality evaluations of the received signal, and a transmission unit transmitting a predetermined number of the quality evaluations of the received signal over an uplink control channel.

Radio communication apparatus and method

A communication terminal in a multi-carrier system using a frequency bandwidth including a plurality of resource blocks, each of the resource blocks including one or more sub-carriers. The communication terminal includes a receiving unit configured to receive a signal in which a control channel is multiplexed into a single radio frame based on a number of control channels allocated into the single radio frame to use a lower coding rate by repeating transmitting without changing encoding method in which a channel other than the control channel is multiplexed in accordance with scheduling information for allocating one or more of the plurality of resource blocks to the communication terminal and a processing unit configured to perform a process on the signal received by the receiving unit.

Base station and transmission method

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Yokohama, Japan

Kenichi Higuchi