| Patent application number | Description | Published |
|---|
| 20100054116 | Radio Base Station and Radio Mobile Station - The base station transmits a synchronization signal that contains a pattern of repeated SYNC's generated by dividing FFT size by N wherein the pattern of repeated SYNC's is inverted in polarity for each of the SYNC's according to a code outputted from a code generating circuit. CP length is M/N of FFT size, and the number of divisions (M+N) of a symbol of the synchronization signal is brought into agreement with the code length L of Barker code. The mobile station detects the synchronization signal by using a first matched filter that has as many taps as (FFT size/N) stages, and uses a pattern of SYNC's generated by dividing FFT size by N as a tap coefficient, and a second matched filter that has as many taps as (M+N) stages and uses Barker code as a tap coefficient. | 03-04-2010 |
| 20100086084 | ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING DEMODULATOR - An OFDM demodulator which does not require a reference signal for synchronization of carriers and can reduce influence of phase rotation by a propagation path when carrier synchronization is made. The OFDM demodulator performs Fourier transform plural times in 2 or more different operation ranges for the same OFDM symbol, calculates phases of sub carriers from the plural-time results of the Fourier transform, compares the calculated phases for each of the plural-time results of the Fourier transform and detects an error in frequency of reproduction carrier from the compared results. | 04-08-2010 |
| 20100309864 | RESOURCE ASSIGNMENT METHOD AND COMMUNICATION APPARATUS FOR WIRELESS COMMUNICATION SYSTEM - Resources are assigned in units of resource blocks each composed of one or more subcarriers, inter-cell interference adjustment control information is notified to each other among base stations, a transmit power limitation on each of the resource blocks in a cell is decided based on the inter-cell interference adjustment control information; and the decision of the transmit power limitation is changed sequentially beginning at a resource block having a transmit power limitation different from the transmit power limitation on an adjacent resource block. | 12-09-2010 |
| 20100309866 | WIRELESS COMMUNICATION SYSTEM, BASE STATION AND MOBILE STATION - In a system of the present invention, the amount of cell-edge band is limited. In addition, the upper limit of the amount of cell-edge band in each cell is set for limiting the amount of cell-edge band based on the upper limit. The number of cell-edge MSs is also limited. In addition, the upper limit of the number of cell-edge MSs in each cell is set for limiting the number of cell-edge MSs based on the upper limit. | 12-09-2010 |
| 20100311430 | RADIO COMMUNICATION SYSTEM, BASE STATION AND MOBILE STATION - In a radio-communication system, when wanting to perform high-accuracy scheduling in a base station, a large number of information items, such as channel quality information, desired precoding matrix information and so on, are fed back from a mobile station with a high degree of accuracy. The base station monitors the feedback information and, upon acquisition of it, transmits to the mobile station a certain kind of feedback information which is judged to contribute to scheduling accuracy improvement while preventing the other kinds of feedback information from being sent to the mobile station. | 12-09-2010 |
| 20110211519 | WIRELESS COMMUNICATION SYSTEM, BASE STATION AND NETWORK CONTROL APPARATUS - In a time slot in which a first base station for performing a multicast transmission executes the multicast transmission, a second base station which does not perform the multicast transmission does not perform a unicast data transmission. The time slot in which the first base station performs the multicast transmission is notified to the second base station from a multicast control apparatus for performing scheduling of the multicast transmission to the first base station. Information to receive the multicast transmission is notified from the second base station to a terminal connected to the second base station. | 09-01-2011 |
| 20110211560 | MOBILITY CONTROL METHOD MITIGATING INTER CELL INTERFERENCE AND BASE STATIONS WHICH ADOPT THE METHOD - Interference applied to neighbor cells during terminal handovers can be reduced in wireless communication systems containing base stations having different cell sizes. A serving cell makes handover judgment criteria easier based on pre-acquired cell size information on its own cell and cell size information of neighbor cells in order to facilitate terminal handovers from a base station with a large cell size to a base station with a small cell size. The serving cell finds evaluation function values based on the propagation state (e.g. reference signal received power) between the terminal and target cell, and the interference and load information exchanged between the base stations, and selects the terminal for handover by comparing the evaluation function value with the handover criteria value. The system selects a target cell having a good effect in lowering interference such as a cell with large reference signal received power acquired from a terminal, to serve as the handover destination. | 09-01-2011 |
| 20110212744 | TRANSMIT POWER CONTROL METHOD FOR RADIO COMMUNICATION SYSTEM AND RADIO BASE STATION DEVICE - A communication device includes pilot signal sending part and transmit power control part and holds a criterion value indicating target channel quality for mobile stations within the area covered by the base station. It creates quality data from reports from one or plural mobile stations, stores the quality data, creates a first representative value indicating average channel quality for the mobile station(s) from the stored quality data, and changes the transmit power depending on the result of comparison between the first representative value and the criterion value. It creates a second representative value indicating distribution of low channel quality from the stored quality data and updates the criterion value depending on the result of comparison between the second representative value and the criterion value. | 09-01-2011 |
