Patent application number | Description | Published |
20100128684 | Base Station Apparatus and Wireless Communication Method - A base station apparatus which conducts a packet communication with a wireless communication terminal includes: a retransmission request detection unit which detects a retransmission request from the wireless communication terminal; a bandwidth assignment unit which assigns a communication bandwidth applied to the packet communication; a modulation class calculation portion, based on both bandwidth information regarding the bandwidth assigned by the bandwidth assignment unit and a data amount of packets corresponding to the retransmission request, calculates a modulation class applied to a retransmission in order to adjust a number of retransmitted packets to be the same as a number of previously transmitted packets; a modulation class determination unit which determines whether or not the modulation class is lower than a modulation class applied to a previous packet transmission; and a retransmission unit which retransmits packets corresponding to the retransmission request based on the determination result regarding the modulation class. | 05-27-2010 |
20100296650 | WIRELESS COMMUNICATION SYSTEM, BASE STATION, TERMINAL AND WIRELESS COMMUNICATION METHOD - A base station of a wireless communication system includes: a base station side data generation portion generating a number of sets of scramble data which are different from each other while the number of sets of the scramble data is the same as or more than the number obtained by multiplying the number of the sub-channels used in said overall wireless communication system by the number of the subcarriers; a base station side storage portion which stores the scramble data; a base station side upper layer control portion which outputs both transmission data for a terminal at other end of a communication and information of sub-channels; a base station side lower layer control portion which, based on the information of the sub-channels, controls the base station side storage portion to output scramble data corresponding to the sub-channels; a base station side scramble portion which conducts a multiplication operation between the transmission data output from the base station side upper layer control portion and the scramble data output from the base station side storage portion based on a control by the base station side lower layer control portion. | 11-25-2010 |
20110032907 | Mobile Communication System, Base Station Device and Channel Allocation Method - A base station sends to a target base station a switching request which contains a time slot used in communication with a mobile station. The base station allocates to the mobile station at least one idle communication channel included in time slots different from the time slot contained in the switching request received from the base station. | 02-10-2011 |
20110034172 | Mobile Communication System, Mobile Station Device, Base Station Device and Handover Method - A mobile station which performs a soft handover from a serving base station to a base station in which frame synchronization is established in the uplink direction with the base station calculates the time difference between the receive timing of a downlink signal sent from the base station and the receive timing of a broadcast control channel sent from the base station at S | 02-10-2011 |
20110044311 | WIRELESS COMMUNICATION METHOD, WIRELESS COMMUNICATION SYSTEM, BASE STATION AND MOBILE STATION - One object 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 (Orthogonal Frequency Division Multiplexing) modulation scheme. In one embodiment, a PHS terminal generates a timing correction channel (first time) to be frame synchronized with a notification channel. A base station transmits a timing correction burst to the PHS terminal only when a correlation peak detected from a received OFDM symbol is within a predetermined timing detection range. If the timing correction burst is not introduced from the base station even after expiration of predetermined time duration, the PHS terminal generates a new timing correction channel (second time), in which transmission timing of a previously generated timing correction channel is shifted. | 02-24-2011 |
20110075749 | WIRELESS COMMUNICATION METHOD, WIRELESS COMMUNICATION SYSTEM AND BASE 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 (Orthogonal Frequency Division Multiplexing) modulation scheme. In one embodiment, a base station removes a guard interval from an OFDM symbol received from a PHS terminal through a timing correction channel at two different timings to obtain two effective symbols, calculates a timing correction amount by including one timing, at which an guard interval is removed for the effective symbol that has caused detection of one correlation peak within a predetermined timing detection range of two correlation peaks detected from the respective effective symbols, into a differential from reference timing of the base station at the time of detection of the one correlation peak, and transmits the timing correction amount to the PHS terminal by means of a timing correction burst. | 03-31-2011 |
20130100927 | RADIO BASE STATION AND COMMUNICATION CONTROL METHOD - A radio base station (eNB | 04-25-2013 |
20130114753 | RADIO BASE STATION AND COMMUNICATION CONTROL METHOD - A radio base station (eNB | 05-09-2013 |
20150055520 | BASE STATION AND COMMUNICATION CONTROL METHOD - A control unit | 02-26-2015 |
20150124909 | RECEPTION APPARATUS AND RECEPTION METHOD - A reception apparatus obtains a first channel estimated value from a reference signal of each layer and a known reference signal that are received and multiplies the first channel estimated value by an orthogonal signal sequence in each layer. Subsequently, the reception apparatus synthesizes a signal in each layer and, from the orthogonal signal sequence and the synthesized signal, calculates an adaptive array antenna weight. Next, the reception apparatus carries out antenna synthesis of the data signal and the reference signal by using the above weight for each layer and obtains a second channel estimated value from the reference signal subjected to the synthesis. Then, the reception apparatus carries out MIMO demodulation from a result of the channel estimation for each layer described above. | 05-07-2015 |
20150373718 | COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND COMMUNICATION APPARATUS - Provided is a communication system that, in using a communication scheme such as TD-LTE, may attain a high speed communication by securing a bandwidth of carriers and prevent radio interference with another system by keeping the carriers within a frequency band assigned to the communication scheme. Specifically, the communication system having a plurality of communication apparatuses for carrying out a radio communication by assigning the plurality of communication apparatuses to a second frequency band with a predetermined bandwidth to be exceeded by carriers serially assigned, assigns the carriers to the second frequency band in such a manner as to overlap a portion of each of the carriers, and a communication apparatus ( | 12-24-2015 |
20160050056 | RECEIVING APPARATUS AND RECEIVING METHOD - A receiving apparatus | 02-18-2016 |