Patent application number | Description | Published |
20100118814 | RADIO FRAME CONTROL DEVICE, RADIO COMMUNICATION DEVICE, AND RADIO FRAME CONTROL METHOD - A radio frame control device comprises a controlling unit, a resource block allocation unit, and a resource block conversion unit. The controlling unit controls a downlink radio frame of an orthogonal frequency division multiple access scheme. The resource block allocation unit allocates resource blocks to a terminal station using any one of a plurality of resource block allocation methods respectively having different restrictions. The resource block conversion unit determines whether or not conversion is possible from allocation information of resource blocks allocated according to a first resource block allocation method into resource block allocation information by a second resource block allocation method. The resource block conversion unit converts the resource block allocation method for the resource block allocation information when the conversion is possible. | 05-13-2010 |
20100215008 | BASE STATION APPARATUS AND WIRELESS RESOURCE ALLOCATION METHOD - A base station apparatus in a wireless communication network system includes an information obtaining unit that obtains a delay request value for application data which is transmitted and received between a terminal and a communication partner thereof through an application layer, where the terminal performs data transmission and reception by wirelessly accessing the base station apparatus; and a resource allocator that computes, based on the delay request value for the application data, a residual time up to a time by which an application data transmitting side, which is one of the base station apparatus and the terminal, should complete wireless transmission of TCP packets which store the application data, and performs allocation of a wireless resource used in wireless communication between the base station apparatus and the terminal, based on a degree of margin of the residual time for a prearranged transmission time of the wireless transmission from the application data transmitting side. | 08-26-2010 |
20110058543 | FREQUENCY BLOCK ALLOCATION APPARATUS AND METHOD, AND COMPUTER PROGRAM - A frequency block allocation apparatus based on a single carrier frequency division multiple access method includes an allocation index computation target selector that selects frequency block groups, each consisting of one or more continuous non-allocated frequency blocks from a set of non-allocated frequency blocks; an allocation index computation unit that computes an allocation index for each target pair of each frequency block group and a terminal; and a frequency block allocation unit that determines one of the target pairs to be a frequency block allocation target, in accordance with priority based on the computed allocation indexes. | 03-10-2011 |
20110063975 | WIRELESS RESOURCE ALLOCATION APPARATUS AND METHOD - A wireless resource allocation apparatus performs determining an amount of VoIP traffic for each terminal station; determining whether semi-persistent scheduling or dynamic scheduling is used for transmitting each packet of the VoIP traffic, based on a result of the determination for the amount of the VoIP traffic; managing, for each terminal station, a resource block allocated in the semi-persistent scheduling; and managing each resource block which is not managed for the allocation in the semi-persistent scheduling and is allocated in the dynamic scheduling. If it is determined that the dynamic scheduling is used for transmitting each packet of the VoIP traffic to a terminal station, the resource block, which has been managed for the relevant terminal station as a resource block allocated in the semi-persistent scheduling, is released, and the released resource block is managed as a resource block allocated in the dynamic scheduling. | 03-17-2011 |
20110070919 | TRANSMISSION POWER CONTROL APPARATUS, TRANSMISSION POWER CONTROL METHOD, AND COMPUTER-READABLE STORAGE MEDIUM STORING TRANSMISSION POWER CONTROL PROGRAM - A transmission power control apparatus is provided with: an interference information acquisition unit which acquires interference information indicative of an interference amount for each frequency block in a neighboring base station; and a transmission power control unit which control the transmission power of a mobile terminal when a frequency block group configured by one or more frequency blocks is allocated to the mobile terminal, based on the interference information acquired by the interference information acquisition unit. | 03-24-2011 |
20110081938 | TRANSMISSION POWER CONTROL OF MOBILE STATION - A transmission power control device is able to capture the serving sector measurement information of a mobile station with respect to a serving sector and the neighboring sector measurement information of the mobile station with respect to a neighboring sector. The transmission power control device selects a power control mode based on a decision as to whether or not the neighboring sector measurement information has been captured in an applied time in the past. The power level of a mobile station is determined based on the selected power control mode. Thus, it is possible to reduce inter-cell interference and inter-sector interference because the power level of a mobile station is determined in light of communication environments, even though the mobile station is connected with a base station in an LTE-based communication system which cannot always detect the neighboring sector measurement information. | 04-07-2011 |
20110182236 | WIRELESS BASE STATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A wireless base station apparatus communicates with first terminal devices belonging to the present cell by means of IDMA. The apparatus receives signals sent from the first terminal devices and at least a signal sent from a second terminal device belonging to another cell; separately extracts each received signal from the first terminal devices and the second terminal device from the signals received by the receiver and computes a channel value for each received signal, by using interference replica signals; sends information for requesting a second wireless base station apparatus which communicates with the second terminal device to send a log-likelihood ratio obtained based on a signal received from the second terminal device; performs decoding using the channel value for each first terminal device, and generates a log-likelihood ratio as a decoding result and the corresponding interference replica signal; and performs decoding using the log-likelihood ratio received from said second wireless base station apparatus and the channel value for the second terminal device, and generates a log-likelihood ratio as a decoding result and the corresponding relevant interference replica signal. | 07-28-2011 |
20110255617 | RADIO APPARATUS - An in-phase component (I channel) and a quadrature component (Q channel) are interchanged between modulation symbols of an 8PSK system to be assigned to subcarriers of an OFDM system. | 10-20-2011 |
20110305140 | WIRELESS COMMUNICATION RESOURCE ASSIGNING APPARATUS, BASE STATION APPARATUS AND WIRELESS RESOURCE ASSIGNING METHOD - A wireless resource assignment method includes: a step of, from terminals that issue requests for assigning wireless resources, selecting a predetermined number of said terminals that are candidates to which the wireless resources are assigned in accordance with evaluation indices of at lease one of an application layer and a TCP layer of said terminals arranged in descending order; and a step of assigning the wireless resources to the predetermined number of said selected terminals that are wireless resource assignment candidate terminals while maximizing the evaluation indices of a physical layer. | 12-15-2011 |
20120063527 | Receiver, Channel State Information Compressing Method, and Computer Program - A receiver receives a signal from a transmitter via communication channels, informs the transmitter of channel state information, and includes a channel correlation value computation unit that computes a correlation value assigned to each channel state information combination; a conversion input data generation unit that determines a channel state information combination having a relatively large correlation based on the correlation value, to be conversion input data; a time-to-frequency region conversion unit that converts the region of the conversion input data from a time region to a frequency region; an information compressing unit that compresses information of a frequency component included in the conversion input data obtained by the time-to-frequency region conversion unit; and a transmitting unit that sends the transmitter, information-compressed data obtained by the information compressing unit and information used for isolating the channel state information items included in the conversion input data. | 03-15-2012 |
20120069814 | Frequency Allocation Device and Program Therefor - A frequency allocation part (a frequency allocation device) of a base station device includes a cell-edge area unallocated channel estimation part for estimating a cell-edge area unallocated channel (or a cell-edge area unallocated RB) corresponding to a frequency channel (RB) which an adjacent base station device does not allocate to a mobile station (UE) in a cell-edge area; and a channel allocation part for allocating the cell-edge area unallocated channel, estimated by the cell-edge area unallocated channel estimation part, to a mobile station in a cell area. | 03-22-2012 |
20120076075 | INITIAL ACCESS SETTING INFORMATION GENERATING APPARATUS, METHOD, AND PROGRAM, AND BASE STATION APPARATUS - An initial access setting information generating apparatus includes a preamble information transmission number obtaining unit that receives and obtains the number of transmissions for preamble information in a non-contention type initial access procedure performed between a base station and a communication terminal, where the preamble information transmission number obtaining unit receives and obtains the number of transmissions after the initial access procedure is completed; an expected reception power determination unit that determines an expected reception power at the base station, based on the number of transmissions for the preamble information, which is obtained by the preamble information transmission number obtaining unit; and a set value communication unit that generates and outputs initial access setting information about the initial access procedure for the communication terminal, based on the expected reception power determined by the expected reception power determination unit. | 03-29-2012 |
20120106489 | Reference Signal Transmission Scheduling Device and Reference Signal Transmission Scheduling Method - A reference signal transmission scheduling device, which performs scheduling on uplink transmission of a reference signal (SRS) from a mobile terminal to a base station in a wireless communication system, is designed to appropriately allocate an SRS transmission resource to the mobile terminal in consideration of the current circumstances of the mobile terminal. Herein, the maximum value of an SRS bandwidth is calculated based on the maximum transmission-enabled power of the mobile terminal, while the minimum value of the SRS bandwidth is calculated based on the mobility of the mobile terminal. Additionally, the SRS bandwidth, which is actually used by the mobile terminal subjected to SRS transmission resource allocation, is determined within the range between the maximum value and the minimum value of the SRS bandwidth. | 05-03-2012 |
20120140661 | Communication Quality Estimation Apparatus, Base Station Apparatus, Communication Quality Estimation Method, and Communication Quality Estimation Program - A communication quality estimation apparatus includes a channel information acquisition section for receiving channel quality information indicating channel quality in transmission paths between a plurality of terminal apparatuses and a base station apparatus from the plurality of terminal apparatuses for each subframe, a smoothing calculation section for calculating smoothed channel quality information by smoothing the channel quality information received so far from the terminal apparatus for each terminal apparatus, and a smoothed information storage section for storing the smoothed channel quality information calculated by the smoothing calculation section in association with an identifier of each of the plurality of terminal apparatuses. | 06-07-2012 |
20120170641 | Channel Information Compressing Apparatus and Method, Channel Information Decompressing Apparatus and Method, Receiver, and Transmitter - A channel information compressing apparatus of the present invention includes a DCT part that performs discrete cosine transform on channel information (CSI) representing the state of a communication channel, and an information compressor that compresses high frequency components of information included in discrete cosine transform data which is produced by way of discrete cosine transform, thus compressing information while maintaining a good accuracy of channel information. | 07-05-2012 |
20120218021 | Threshold Computation Apparatus and Threshold Computation Program - A threshold computation apparatus obtains estimated interference power for an uplink from a terminal to a base station; a predetermined communication quality value necessary for the uplink; a maximum value of transmission power of the terminal; and transmission power of the base station for a downlink from the base station to the terminal. The apparatus subtracts a logarithmic value of the maximum value of the transmission power of the terminal from a logarithmic value of the transmission power of the base station for the downlink; adds a logarithmic value of the communication quality value and a logarithmic value of the estimated interference power to a result of the subtraction; and determines a result of the addition to be a logarithmic value of received power at the terminal; and computes a threshold based on the logarithmic value of the received power at the terminal and predetermined conditions. | 08-30-2012 |
20120250638 | Base Station Apparatus and Communication Terminal - Provided is a base station apparatus that employs a dynamic scheduler mode which performs wireless resource allocation for each subframe and applies a result of the allocation to the corresponding subframe, or a continuous transmission scheduler mode which performs wireless resource allocation for each subframe appearing periodically based on a period P and applies a result of the allocation for the relevant subframe to P continuous subframes from a subframe n to a subframe n+P−1. The base station apparatus includes a terminal communication device that communicates continuous transmission application ON/OFF information, which indicates whether or not the continuous transmission scheduler mode is employed, and continuous transmission period information, which indicates a period of continuous transmission scheduling according to the continuous transmission scheduler mode, to a terminal. The terminal communication device may store the continuous transmission application ON/OFF information and the continuous transmission period information in a PDCCH region. | 10-04-2012 |
20150029976 | WIRELESS COMMUNICATION SYSTEM, TERMINAL, TRANSMISSION STATION, AND WIRELESS COMMUNICATION PROGRAM - A wireless communication system includes an upper transmission station and a lower transmission station, each serving as a transmission station, a terminal serving as a reception station. The upper transmission station allocates a downlink control channel for each terminal to part of a predetermined data-channel region ascribed to the lower transmission station based on a demodulation reference signal for each transmission station. Based on the allocation result, the lower transmission station allocates the downlink control channel for each terminal, which is disposed at art of the data-channel region thereof. The terminal decodes the downlink control channel based on the demodulation reference signal. | 01-29-2015 |
20150163820 | RADIO TERMINAL, BASE STATION APPARATUS, RADIO COMMUNICATION SYSTEM, AND COMPUTER PROGRAM - A radio terminal includes: a base station connection communication portion that performs base station connection communication with a base station; a communication quality determination portion that determines a communication quality of the base station connection communication to acquire a determination result of the communication quality; an inter-terminal communication control portion that decides a radio resource to be used for inter-terminal communication from radio resources that the base station uses, based on the determination result of the communication quality; and an inter-terminal communication portion that performs inter-terminal communication with another radio terminal, using the radio resource decided by the inter-terminal communication control portion. | 06-11-2015 |
20150208459 | WIRELESS COMMUNICATION TERMINAL, BASE STATION, WIRELESS COMMUNICATION METHOD, COMMUNICATION METHOD, WIRELESS COMMUNICATION PROGRAM, COMMUNICATION PROGRAM, AND WIRELESS COMMUNICATION SYSTEM - A wireless communication terminal includes a base station communication part which communicates with a base station; an interterminal communication part which communicates with another wireless communication part; a communication failure detector which detects a communication failure with a first connected base station serving as a base station connected thereto; and a communication resume processor which carries out an interterminal communication with another wireless communication terminal so as to communicate with a second connected base station, connected to another wireless communication terminal, via another wireless communication terminal when a communication failure is detected with the first connected base station, thus carrying out a process of resuming a communication upon detecting the communication failure. | 07-23-2015 |