The present invention is designed to provide a user terminal, a radio base station and a radio communication method of novel structures that can achieve a good communication environment. A radio base station non-orthogonal-multiplexes downlink signals for a plurality of user terminals over a given radio resource, a user terminal having received the downlink signals for the plurality of user terminals decodes downlink signal for another user terminal, judges whether or not the downlink signal for the other user terminal has been successfully received, based on the decoding result of the downlink signal, reports a judgement result as to whether or not the downlink signal for the other user terminal has been successfully received and a judgement result as to whether or not a downlink signal for the user terminal has been successfully received, to the radio base station, and then the radio base station executes retransmission control of downlink signals based on reports from the user terminal.

User terminal, radio base station and radio communication method

A wireless telecommunication system comprises base stations for communicating with terminal devices. One or more base stations support a power boost operating mode in which a base station's available transmission power is concentrated in a subset of its available transmission resources to provide enhanced transmission powers as compared to transmission powers on these transmission resources when the base station is not operating in the power boost mode. A base station establishes an extent to which one or more base stations in the wireless telecommunications system support the power boost operating mode conveys an indication of this to a terminal device. The terminal device receives the indication and uses the corresponding information to control its acquisition of a base station of the wireless telecommunication system, for example by taking account of which base stations support power boosting and/or when power boosting is supported during a cell attach procedure.

Telecommunications apparatus and methods

In a mobile communication method by which a mobile station (UE) transmits a control signal to a radio base station (eNB) in an uplink by using an uplink dedicated resource, different methods for determining whether or not a synchronization state is established in the uplink, are used depending on whether or not the uplink dedicated resource is set up.

Mobile communication method and radio base station

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

Methods and apparatus for addressing wireless transmit/receive unit (WTRU) behavior in response to configuration, configuration parameters and access issues related to the activation/deactivation process when the WTRU may be configured with multiple serving cells or carrier aggregation

Component carrier activation/deactivation in multi-carrier systems

A disclosed mobile station is designed to send or receive at least a control channel using a given frequency in a first operating mode and to tune to a frequency different from the given frequency and perform a neighboring cell search in a second operating mode. The mobile station includes a measuring unit configured to obtain a measurement of radio channel quality at a measurement interval; and a determining unit configured to compare the measurement and a threshold and to select one of the first operating mode and the second operating mode based on the result of comparison. The mobile station allows a base station to recognize the operating mode of the mobile station either by preventing reporting of the measurement lower than the threshold to the base station or by transmitting a signal indicating the selected operating mode to the base station.

Mobile station, base station, and method

A synchronization control method in a communication system including a mobile station performing an intermittent reception and a base station, including: generating, at the base station, a synchronization request (S103), when data addressed to the mobile station arrives (S101); receiving, at the mobile station, the synchronization request from the base station (S103); transmitting, at the mobile station, feedback information, as a response to the synchronization request (S105); receiving, at the base station, the feedback information (S105); and measuring, at the base station, a signal propagation delay time by using a reception timing of the feedback information (S107).

Base station, mobile station, synchronization control method, and IC chip

A base station includes a congestion state determination unit that determines whether the base station is in a congestion state; a barring target setting unit that sequentially sets targets of barring among a plurality of the targets of the barring when a determination is made that it is the congestion state; a barring time interval setting unit that sets a time interval of the barring based on the congestion state when the determination is made that it is the congestion state; and a transmitter that transmits information representing the targets of the barring and information representing the time interval of the barring to the user equipment.

Base station and communication control method

PROBLEM TO BE SOLVED: To provide a mobile station and base station configuration that enables processing when a MAC (Medium Access Control)control PDU is received, the MAC control PDU is constituted by multiplexing the unspecific number of and/or differently-sized control messages, while suppressing MAC header overhead to a minimum SOLUTION: The mobile station includes: a decision unit; and a processing unit When a control signal of a variable length transmitted from a base station to a transport channel is received, the decision unit determines whether the control signal is a random access response in accordance with a header of the control signal or an additional physical control channel transmitted in addition to the transport channel If the control signal is a random access response, the processing unit extracts a random access response, for which it is possible to be addressed to the mobile station itself, from a control message block following the header and processes the extracted random access response COPYRIGHT: (C)2011,JPO&INPIT

Minami Ishii

Papers

Mobile communication method and radio base station

Mobile station, base station, and method

Base station, mobile station, synchronization control method, and IC chip

Base station and communication control method

Mobile station and wireless base station