Sharp Kabushiki Kaisha Corporation

Waho Oh

Katsunari Uemura

Shohei Yamada

Yasuyuki Kato

Daiichiro Nakashima

Hidekazu Tsuboi

Yasuhiro Hamaguchi

Yongming Liang

Katsutoshi Ishikura

Yasuo Sugawara

Masao Miyazaki

Isao Hirakawa

A communication system includes a terminal apparatus and a base station apparatus. The terminal apparatus communicates with a base station apparatus by carrier aggregation using a plurality of serving cells, where each of the plurality of serving cells has a different frequency. In addition, the terminal apparatus removes a measurement identity relevant to a serving cell of the plurality of serving cells based on that the serving cell was removed.

Terminal apparatus, base station apparatus, method of a terminal apparatus, and method of a base station apparatus for managing a measurement configuration

Terminal apparatus, base station apparatus, method of a terminal apparatus, and method of a base station apparatus each using a measurement configuration

A communication system that includes at least a terminal apparatus and a base station apparatus. The terminal apparatus communicates with a base station apparatus by carrier aggregation using a plurality of serving cells, wherein each serving cell of the plurality of serving cells has a different frequency. The terminal apparatus receives (from the base station apparatus) a measurement configuration which includes a reporting configuration, a measurement object to indicate a measurement frequency and a measurement identity which links the measurement object to the reporting configuration. The terminal apparatus, in a case that an entry condition of the event corresponding with an event identity of the reporting configuration is fulfilled, transmits (to the base station apparatus) a measurement report which includes measurement results of all of the serving cells.

Terminal apparatus, communication method for terminal apparatus, base station apparatus and communication method for base station apparatus

Terminal apparatus communicating with base station apparatus by carrier aggregation, method of a terminal apparatus, and method of a base station apparatus

Mobile station apparatus, management method in a mobile station apparatus, processing section, base station apparatus and communication system

Terminal apparatus communication with a base station apparatus by carrier aggregation and base station apparatus communication with a terminal apparatus by carrier aggregation

Mobile station apparatus, base station apparatus, management method in a mobile station apparatus, processing circuitry and communication system that removes measurement identity for a removed serving cell

Provided are a communication system, a base station apparatus, a mobile station apparatus, and a communication method where a configuration message is transmitted or received. The configuration message includes a measurement configuration, where the measurement configuration includes a measurement object and a reporting configuration. The measurement object is used to determine a first cell from among the plurality of cells, the measurement object is linked to the reporting configuration and indicates the measurement frequency, the reporting configuration includes an criterion, and the criterion triggers the mobile station apparatus to send a measurement report.

Mobile station apparatus, base station apparatus, management method in a mobile station apparatus, processing section and communication system

A mobile station apparatus provided in a mobile communication system that includes a base station apparatus and the mobile station apparatus, where the mobile station apparatus is configured to perform communications with the base station apparatus by using a plurality of frequencies together and the plurality of frequencies being configured by the base station apparatus. The mobile station apparatus includes a first circuitry configured or programmed to notify the base station apparatus of a mobile station apparatus capability indicating measurement ability for first measurement or second measurement on the communication, where the first measurement using a measurement gap and the second measurement not using a measurement gap. The mobile station apparatus also includes a second circuitry configured or programmed to perform the first measurement or the second measurement, based on information for the measurement gap, reception quality of one of the frequencies and the measurement ability.

Communications based on measurements using and not using a measurement gap

Provided are a communication system, a base station apparatus, a mobile station apparatus, and a communication method which can effectively manage measurement information held by a base station apparatus and a mobile station apparatus in a system comprising a plurality of component carriers. The mobile station apparatus is used in a mobile communication system configured by a base station apparatus and a mobile station apparatus. For a plurality of cells with each cell having different frequency, the mobile station apparatus manages each of the cells activated by the base station apparatus to be a belonging cell and manages a cell adjacent to the first cell among the aforementioned cells as a cell other than the first cell.

A base station apparatus, in a mobile communication system comprised of a plurality of base station apparatuses for performing transmission using mutually different frequency bands and a mobile station apparatus capable of concurrently communicating with each of the base station apparatuses, makes a determination whether the mobile station apparatus needs to perform Inter-Frequency Measurement to communicate with the plurality of base station apparatuses, and when Inter-Frequency Measurement is needed, based on the number of frequency bands of base station apparatuses that concurrently communicate with the mobile station apparatus and the number of frequency bands that the mobile station apparatus is capable of concurrently receiving, selects one of a first Inter-Frequency Measurement method without the need for providing a measurement gap in one of the frequency bands, and a second Inter-Frequency Measurement method with the need for providing a measurement gap in one of the frequency bands.

Base station apparatus, mobile station apparatus, mobile communication system and communication method having selectable inter-frequency measurement methods

Provided are a communication system, a base station apparatus, a mobile station apparatus, and a communication method which can effectively manage measurement information held by a base station apparatus and a mobile station apparatus in a system comprising a plurality of component carriers. The mobile station apparatus is used in a mobile communication system configured by a base station apparatus and a mobile station apparatus. For a plurality of cells with the cell having different frequency, a reference cell with respect to an object to be measured is defined as a measurement reference cell when executing a measurement. The mobile station apparatus specifies one or more of the measurement reference cell for the object to be measured and executes a measurement of the object to be measured for the specified one or more of the measurement reference cell.

The present invention is to enable reduction of constraint brought by generation of ID codes of reference signals to be used for cooperative reception and the allocation of the reference signals when radio communication is carried out between a plurality of base station apparatuses and a terminal unit. Terminal units UEto UEare terminal units existing in the cellular zone of a base station apparatus BSand are performing communication with base station apparatus UE. When terminal unit UEis located at the edge of cell and its reception characteristic degrades, another base station apparatus, specifically, base station apparatus BSalso performs cooperative transmission while terminal unit UEperforms cooperative reception. In this case, in order to demodulate the signal from base station apparatus BS, an ID code of a reference signal that is different from the reference signal the terminal unit uses to demodulate the signal from a solo base station apparatus is used as the ID code of the reference signal that is transmitted from base station apparatus BSand specific to the terminal unit.

Base station apparatuses, terminal unit, radio communication system having those apparatuses, and program to be executed by the base stations

To improve throughput of the whole system while reducing power consumption, in a mobile communication system comprising a mobile station apparatus and a base station apparatus, the base station apparatus creates an interference information table based on channel quality of an uplink channel, and transmits the interference information indicator table to the mobile station apparatus. The mobile station apparatus determines a state of interference in an uplink frequency band based on the interference information indicator table, determines a frequency band of a measurement pilot channel used to determine received quality, and makes a request to the base station apparatus for a transmission resource. For example, the mobile station apparatus determines a frequency band with lowest interference among the uplink frequency bands as a frequency band of the measurement pilot channel.

Mobile communication system, base station apparatus, and method to reduce inter-cell interference for same

In an MBMS service desired to be received, if a condition for performing an MBMS request (an MBMS request trigger criterion) is satisfied (S: YES), a mobile stationin an idle mode (RRC_IDLE) enters an MBMS request transmission process, transmits a preamble to a base station, receives a random access response including scheduling information for transmitting a Messageand the like from the base station, and transmits the Messageincluding an RRC Connection Request (including an NAS ID of the mobile station itself), the MBMS request and channel quality information to the base station(S), and if an Message, which includes RRC Connection Setup that is destined for the mobile station itself and includes the NAS ID, and which includes feedback resource assignment information, is received from the base station(S: YES), the mobile stationtransits to a connected mode (RRC_CONNECTED), and also uses the designated resource to provide feedback to the base station (S). Thereby, the MBMS service can be efficiently provided via SCPTM transmission.

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Osaka, Japan

Waho Oh