Ntt Docomo, Inc.

Kokusai Electric Co., Ltd.

Takahiro Takiguchi

Kohei Kiyoshima

Naoto Ookubo

Tooru Uchino

Takayuki Isogawa

Satoshi Nagata

Hideaki Takahashi

Hiroki Harada

Anil Umesh

Wuri Andarmawanti Hapsari

Sadayuki Abeta

Kenichiro Aoyagi

Hiroyuki Atarashi

Nobuhiro Takahashi

Kengo Yagyu

Susumu Yokoyama

Masaaki Ohtake

Soulisak Ormsub

Kazumasa Nakamura

A communication device used as a first communication device in a wireless communication system including the first communication device, a second communication device communicating with the first communication device, and a user equipment communicating with the first communication device, includes an acquisition unit configured to acquire a parameter used for performing a random access procedure from the second communication device; and a control unit configured to transmit, in the case of receiving a random access preamble from the user equipment in a random access channel indicated by the parameter, information indicating that the random access preamble indicated by the parameter is received from the user equipment to the second communication device.

Communication device and random access control method

A user apparatus configured to perform communication with a base station in a mobile communication system that supports carrier aggregation, including: transmission means configured to transmit, to the base station, the number of layers for each of component carriers that form the carrier aggregation as information of downlink MIMO capability; and reception means configured to receive, from the base station, the number of layers that is used for determining a bit width of a rank indicator for each of the component carriers that form the carrier aggregation.

User apparatus, base station and information reception method

A base station used as a first base station in a wireless communication system including the first base station, a second base station that communicates with the first base station, and a user equipment that communicates with the first base station includes: a reception unit that receives a parameter used for generating a downlink physical data channel and data to be transmitted toward the user equipment from the second base station; a generating unit that generates the downlink physical data channel by performing processing of Layer 1 on the data using the parameter; and a transmission unit that transmits the generated downlink physical data channel.

Base station and transmission method

A base station is provided that includes an obtainer that obtains a first parameter used for generation of a signal of a physical downlink control format indicator channel, a second parameter used for generation of a signal of a physical downlink HARQ indicator channel, or a third parameter used for generation of a signal of a physical downlink control channel; a generator that generates the signal of the physical downlink control format indicator channel, the signal of the physical downlink HARQ indicator channel, or the signal of the physical downlink control channel using the first parameter, the second parameter, or the third parameter; and a transmitter that transmits the generated signal of the physical downlink control format indicator channel, the generated signal of the physical downlink HARQ indicator channel, or the generated signal of the physical downlink control channel.

An interface method between a central-aggregate apparatus and an extension apparatus is provided, which includes: transmitting, by the central-aggregate apparatus, uplink signal indication information for a user equipment and an identifier of the user equipment to the extension apparatus; retaining, by the extension apparatus, the identifier and uplink signal information extracted from the received uplink signal indication information and transmitting an uplink signal indication to the user equipment; receiving an uplink signal transmitted from the user equipment based on one or both of the retained uplink signal information and identifier; extracting data information from the uplink signal, estimating uplink communication quality based on the uplink signal, and transmitting one or both of the extracted data information and the estimated uplink communication quality to the central-aggregate apparatus; and receiving, by the central-aggregate apparatus, one or both of the data information and the uplink communication quality from the extension apparatus.

Interface method between central aggregate apparatus and extension apparatus, and radio control system

A base station used as a first base station in a wireless communication system including the first base station, a second base station that communicates with the first base station, and a user equipment that communicates with the first base station includes: a reception unit that receives a parameter used for performing communication in a specific band and data to be transmitted toward the user equipment from the second base station; and a detection unit that performs a process of detecting a use state of the specific band according to the parameter when the data is transmitted to the user equipment.

An object is to improve the throughput of a mobile station UE without affecting the coverage of a macrocell in a case where CA is introduced to a HetNet environment. A radio base station eNB according to the present invention is configured to determine whether or not to change the connection destination of a mobile station UE from a small cell #to a small cell #while the mobile station UE is performing CA by using the macrocell and the small cell #, based on at least one of the congestion status in each of the small cell #and the small cell #and the communication quality in each of the small cell #and the small cell #

Radio base station

In order to suppress an increase in signal quantity attributed to repetition of transition to a 'Preservation state' and return to an 'Active state' when multiple applications are operated independently, a mobile station (UE) of the invention includes: a management unit () which manages a transmission timing for regular data not involving a user operation in each of multiple applications (#to #N); and a transmission unit () which transmits a &#x201c;RRC CONNECTION REQUEST&#x201d; to a radio access network when the mobile station (UE) transitions from a &#x201c;Preservation state&#x201d; to an &#x201c;Active state.&#x201d; The transmission unit () is configured to adjust a transmission timing for the &#x201c;RRC CONNECTION REQUEST&#x201d; based on the transmission timings for the regular data not involving the user operation in the multiple applications (#to #N).

Mobile station that adjusts transmission timing for signal

A stock information display method wherein, when a screen pattern and a stock are entered, stock information regarding the entered stock on display types specified by the entered screen pattern is displayed in accordance with a division pattern designated by the screen pattern. An information terminal wherein an auxiliary memory is equipped with a linkage registration table for storing, as screen patterns, a plurality of screen division patterns and the types of information to be displayed at respective display locations on a divided screen. When a screen pattern and a stock are entered, a controller reads from a main memory the stock information regarding the entered stock on the display types corresponding to the entered screen pattern, creates display data in accordance with a format of the division pattern which corresponds to the screen pattern, and supplies the created data to a display unit. The stock information display method and the information terminal enable a plurality of types of stock information to be displayed on the same screen, thus achieving easier input operation.

Growing community of inventors

Tokyo, Japan

Takahiro Takiguchi