Patent application number | Description | Published |
20090271680 | COMMUNICATION SYSTEM, COMMUNICATION DEVICE, AND DATA FRAME RETRANSMISSION CONTROL METHOD - A mobile station device ( | 10-29-2009 |
20090300453 | TRANSMITTING APPARATUS AND WIRELESS COMMUNICATION METHOD - A transmitting apparatus and a wireless communication method are provided. The transmitting apparatus is capable of transmitting, together with transmission data, retransmission data in response to an HARQ from a receiving apparatus, according to an MCS determined based on a request from the receiving apparatus and includes a storage portion which stores information indicating a transition of an FER with respect to a communication quality for each MCS in both cases in which an HARQ response is enabled and disabled, an HARQ switching portion which switches whether to enable or disable the HARQ response in accordance with a QoS class of data to be transmitted, and an MCS switching portion which switches an MCS in accordance with the switching of whether to enable or disable the HARQ response, while referring to the information stored in the storage portion. | 12-03-2009 |
20090304126 | OFDM Communication Device and Guard Interval Length Decision Method - Even if background noise is present, it is possible to control a guard interval length so that a minimum required SINR can be obtained. An OFDM communication device ( | 12-10-2009 |
20090316634 | Frame Synchronization Method of OFDM Communication System and Receiver Therefor - Provided are a new frame synchronization method, which is capable of shortening the time necessary for frame synchronization between a receiver and a base station of PHS based on an OFDM communication system, and the receiver therefor. | 12-24-2009 |
20100003926 | Communication System, Communication Device and Communication Rate Modification Method - A communication system includes: an RE/IF/BB unit ( | 01-07-2010 |
20100027700 | Communication System, Base Station, Terminal and Communication Method of OFDM System - Provided are a communication system, a base station, a terminal and a communication method of an OFDM system, using an adaptive array, which are capable of alleviating signal quality deterioration by reducing the probability of instant peak power raises. The communication system includes a data producing means 11 for acquiring communication network side data and a user assignment band in a predetermined format, encoding the data, and performing mapping for the user assignment band, null symbol inserting means | 02-04-2010 |
20100086068 | Communication System, Base Station, Terminal, and Communication Method - A communication system using an OFDM includes a data creation section for coding data to be transmitted and mapping the data, a null symbol insertion section for filling a null symbol into a no-data subchannel if the number of subchannels containing the mapped data is small for the band assignment, and a symbol interleave section for performing symbol interleave in the whole user assignment band and inserting a known training symbol and pilot symbol into the determined symbol position of the user assignment band are included and symbols are placed such that signal phase change is continuous in the same subcarrier between symbols and carrier sense is executed at the positions of the symbols where the signal phase change is continuous. | 04-08-2010 |
20100097962 | Communication Control Method, Base Station Device, Terminal Device, and Communication Control System Using TDD-OFDMA Communication Method - In a communication system and a communication method using a TDD-OFDMA communication method, inter-carrier interference due to delay dispersion is prevented by suppressing the delay time within a guard interval. | 04-22-2010 |
20110021157 | Radio Communication System, Radio Communication Device, and Radio Communication Method - One of objects of the present invention is to enhance stability of radio communication by switching between ARQ and HARQ according to whether or not signal quality of received data is deteriorated, such that efficiently perform error correction, when an error is detected in the received data. In a radio communication device (e.g., a PHS terminal | 01-27-2011 |
20110022919 | Wireless Communication System, Wireless Communication Device and Wireless Communication Method - One object of the present invention is to improve stability of wireless communication by effectively requesting retransmission of data to a wireless communication device, which is a data transmission source, by switching ARQ and HARQ if an error has been detected in received data. | 01-27-2011 |
20110026633 | Wireless Communication Method, Wireless Communication System, Base Station and Mobile Station - One of the objects of the present invention is to more completely avoid impossibility of access between a mobile station and a base station, in wireless communication using an OFDM modulation scheme. A mobile station ( | 02-03-2011 |
20110034207 | Mobile Station Device and Transmission Power Control Method - A mobile station ( | 02-10-2011 |
20110038351 | Mobile Station Device and Transmission Power Control Method - A mobile station which performs a handover from a base station to a base station calculates the transmission loss of a broadcast control channel sent from the target base station, and corrects the transmission power of an uplink ANCH to the target base station, based on a known base station desired receive power and the calculated transmission loss. Alternatively, the mobile station may correct the transmission power of the uplink ANCH to the target base station, based on the transmission power of an uplink signal to the serving base station, the transmission loss of a downlink signal sent from the serving base station, and the transmission loss of a broadcast control channel sent from the target base station. | 02-17-2011 |
20110051599 | Radio Communication System, Base Station Device, Radio Communication Terminal, and Radio Communication Method - A wireless communication system which performs packet communication in a time division multiplexing communication format between wireless communication devices using either one or a plurality of communication channels includes: a resend request unit which detects that a received packet contains an error and requests a resend; a resend request detection unit which detects the request for a resend; a packet resend unit which resends the packet in accordance with the request for a resend detected by the resend request detection unit; and a channel allocation unit which allocates a different communication channel for the packet resend unit to resend the packet from the communication channel which was used for sending the packet in which the error detected by the resend request unit was contained. | 03-03-2011 |
20110069786 | RECEIVING DEVICE AND ADAPTIVE MODULATION METHOD - A mobile station ( | 03-24-2011 |
20110096823 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - To realize prompt and efficient data communication by dynamically changing the optimum MCS and PC. A base station ( | 04-28-2011 |
20110199935 | RADIO COMMUNICATION SYSTEM, TRANSMISSION DEVICE, AND COMMUNICATION SIGNAL TRANSMISSION METHOD - Provided are a radio communication system, a transmission device, and a communication signal transmission method, which enable a reception device to correctly demodulate a communication signal without performing a feedback of a propagation path characteristic from the reception device to the transmission device. The transmission device includes an SVD calculation unit for calculating, as an inverse-direction propagation path characteristic, a propagation path characteristic exhibited in a direction from the reception device toward the transmission device and for calculating a forward-direction propagation path characteristic being a propagation path characteristic exhibited in a direction from the transmission device toward the reception device, based on the inverse-direction propagation path characteristic, reception-side calibration information regarding radio reception units notified from the reception device, and transmission-side calibration information regarding radio transmission units, and a weight synthesis unit for generating the communication signal weighted based on the forward-direction propagation path characteristic. | 08-18-2011 |
20110281529 | Communication System, Communication Device and Communication Rate Modification Method - A communication system includes: an RF/IF/BB unit ( | 11-17-2011 |
20120177140 | WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD - A base station includes: a MIMO precoding section ( | 07-12-2012 |
20120183090 | WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD - A base station includes: a MIMO preceding section ( | 07-19-2012 |
20130132786 | COMMUNICATION SYSTEM, COMMUNICATION DEVICE, AND DATA FRAME RETRANSMISSION CONTROL METHOD - A mobile station device configured to communicate with a base station device by a time division duplex (TDD) scheme, and to transmit retransmission data to the base station device by an automatic retransmission scheme in response to reception acknowledgement information transmitted from the base station device, the mobile station device including a controller configured to determine a number of frames from a reception of the reception acknowledgement information to a transmission of the retransmission data, based on a position of a reception slot within a reception frame, the reception slot including the reception acknowledgement information. | 05-23-2013 |
20150016559 | WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD - A base station includes: a MIMO precoding section ( | 01-15-2015 |
20150023453 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - A wireless communication device includes:
| 01-22-2015 |