Abstract: A data allocation method in a wireless communication system in which data is allocated in both a time axis direction and frequency axis direction, and data is transmitted between a mobile station and base station according to an allocated schedule, the allocation method including: measuring propagation path information between the mobile station and the base station; and modifying an allocation width of a burst in the time axis direction or in the frequency axis direction based on the propagation path information.
Abstract: A base station apparatus includes a receiving unit that receives a control signal having predetermined patterns for performing communication control processing at the base station; and a measuring unit that measures SINR of reception data that is obtained from the control signal received by the receiving unit.
Abstract: This invention relates to a nonlinear degree measuring apparatus and method for a power amplifier, and a predistortion compensation apparatus. The nonlinear degree measuring apparatus comprises a delayer (304), for delaying inputted pilot frequency data; a subtracter (305), for subtracting, from the pilot frequency data delayed by the delayer, subsequently inputted pilot frequency data; a power calculating unit (306), for calculating an instantaneous power of an outputted signal from the subtracter (305); and an averager (307), for averaging the instantaneous power calculated by the power calculating unit (306) to obtain an averaged power.
August 17, 2009
Date of Patent:
January 8, 2013
Gang Sun, Jian Min Zhou, Zhan Shi, Hui Li
Abstract: Included are a system information receiving unit for receiving, from a first base station or a second base station, system information including a PI within a PICH and a PCH, and a cell reselecting unit for executing a cell reselection process for switching from a wireless communication with the first base station to that with the second base station if a mobile communication terminal fails to obtain local incoming information due to unsuccessful reception of the PCH, which is made by the system information receiving unit, after receiving a notification that incoming data exists by receiving the PI within the system information received by the system information receiving unit within the first service area. Consequently, the mobile communication terminal and incoming data detecting method and program, which can securely receive incoming data even if the mobile communication terminal fails to receive the PCH although receiving incoming information with the PI.
Abstract: A MIMO-OFDM communication method for transmitting and receiving data using MIMO-OFDM communication has, on the transmitting side, a step of performing precoding processing of transmission data using a prescribed precoding method, and a step of performing OFDM modulation of the precoding-processed data and transmitting the data from a plurality of transmission antennas, and has, on the receiving side, a step of performing MIMO decoding processing of reception signals received by a plurality of reception antennas according to a ZF decoding algorithm or an MMSE decoding algorithm, and outputting the data as a transmission data stream, a step of calculating weighting coefficients according to the precoding method, and a step of performing weighted decoding processing of the transmission data obtained by the MIMO decoding processing, by multiplying path metric of the decoding processing by the weighting coefficients.
Abstract: A parity check matrix construction method for constructing a non-binary parity check matrix defining a non-binary LDPC code. In particular, a parity check matrix construction method for setting codewords able to stably give a superior decoding performance is provided. For this reason, the non-binary non-zero elements are selected so that the determinants of the partial matrices corresponding to the cycles in the parity check matrix do not become 0. Due to this, a non-binary parity check matrix able to give large weight codewords is constructed.
March 30, 2006
Date of Patent:
January 1, 2013
Fujitsu Limited, GET/ENST-Bretagne
Dai Kimura, Ramesh Mahendra Pyndiah, Frederic Guilloud
Abstract: A wireless communication system constructed by a MIMO antenna system and transmitting information from a transmitter having Nt number of transmitting antennas to a receiver 3 having Nr number of receiving antennas. The receiver 3 of this wireless communication system 1 linking the inputs and outputs between a demodulating unit 32 demodulating the input signals from receiving antennas 31 and a decoding unit 35 receiving as input that demodulation output and decoding the non-binary LDPC code of the GF(q) one-to-one under predetermined conditions to enable the inputs and outputs of this demodulating unit 32 and decoding unit 35 to be directly connected and thereby improve the decoding characteristic. That predetermined condition is preferably q=2Nt·m.
Abstract: A wireless communication system has a transmitting device and a receiving device that perform communication by using a multi-carrier signal, wherein the receiving device includes a quality generating unit generating each piece of receiving quality information on each pilot channel for transmitting each pilot signal, a determining unit determining the number of pilot channels needed in the multi-carrier signal based on the receiving quality information, and a notifying unit transmitting a signal requesting the determined number of pilot channels to the transmitting device, and the transmitting device includes an allocation unit determining allocations of pilot signals in the direction of the time axis and in the direction of the frequency axis, corresponding to a requested number of pilot channels, and a transmitting unit transmitting the multi-carrier signal having the determined pilot signal allocations.
Abstract: An apparatus mounted on a mobile object includes a first receiver for receiving a plurality of information regarding a move of the mobile object, a second receiver for receiving identification information determining a moving position of the mobile object, and a display for displaying indication information in the plurality of the information regarding the move of the mobile object received by the first receiver on the basis of the identification information received by the second receiver.
Abstract: A wireless base station for allocating a wireless bandwidth to a wireless terminal based on a bandwidth request from the wireless terminal. The wireless base station includes a receiving part configured to receive a target data transmitted in the allocated wireless bandwidth from the wireless terminal, the target data including one or more user packets on which a combining process or a dividing process is performed and data regarding the combining process or the dividing process and an updating part configured to increase or reduce the total quantity of the allocated wireless bandwidth.
Abstract: A user terminal (MS) is in wireless communication with a relay station (Access RS), the relay station being in communication with a super-ordinate station such as a base station (MR-BS) such that the user terminal can perform either single-hop communication with the access relay station or multi-hop communication with the super-ordinate station. The system defines at least one specific signal to be used in a bandwidth request for multi-hop and/or single hop communication. When the user terminal needs bandwidth, it issues a bandwidth request to the relay station indicating a single hop or multi-hop communication by including or not including the specific signal. The relay station decides whether or not to issue its own bandwidth request to the super-ordinate station based on the presence or absence of the specific signal.
Abstract: A wireless base station controls to decrease a transmission power of a first wireless terminal corresponding to signal quality information exceeding lower limitation of a range in which a transmission scheme to be selected remains unchanged and being below a first threshold value, which is greater than the lower limitation and smaller than upper limitation of the range, among a plurality of wireless terminals corresponding to signal quality information belonging to the range, while controlling to increase a transmission power of a second wireless terminal corresponding to signal quality information being equal to or greater than the first threshold value so that a transmission scheme having a better transmission efficiency is selected, thereby to improve throughput of a communication between the wireless base station and the wireless terminal.
Abstract: Golf equipment including compositions including castable formulations that have low material hardness and increased shear resistance. The compositions may be used in any layer of a golf ball including cores, intermediate layers, and covers and result in high spin rates.
Abstract: A radio channel control method for controlling, in a radio communication system having a transmitter and a receiver, a radio channel from the transmitter toward the receiver. The method includes receiving a signal transmitted from the transmitter by the receiver, measuring reception quality of the signal, generating information which indicates increment or decrement of the reception quality, and controlling a modulation or coding for the radio channel based on the information.
Abstract: A mobile communication system includes a radio network control apparatus having inside a function block for processing a downlink shared channel and table means for storing various setting information related to the downlink shared channel communication and the downlink shared channel multi-cast communication. According to the information, a multi-cast communication (including uni-cast communication) is realized by using the downlink shared channel for one or more mobile apparatuses. Moreover, a base station has a function to transmit the downlink shared channel data and signaling data received from a radio network control apparatus, to a mobile apparatus via a radio line. Furthermore, it is possible to multi-cast data selectively to a particular mobile apparatus being call-connected.
Abstract: An access network selection method in a communications network having access networks is disclosed that includes notifying devices in calling-side and called-side networks of the identifiers of currently available access networks and user preferences; making a list of candidates for an access network to be assigned to the called-side terminal, and transmitting the list to the device in the calling-side network; determining an access network to be assigned to the calling-side terminal in response to reception of the list, and notifying the calling-side terminal of the determined access network; notifying the device in the called-side network of the type of the access network assigned to the calling-side terminal; and determining the access network to be assigned to the called-side terminal in response to reception of the signal of the type of the access network assigned to the calling-side terminal, and notifying the called-side terminal of the determined access network.
Abstract: A mobile communication system has a plurality of nodes, hierarchically connected to each other, including a source base station and a target base station. A U-plane management station includes detecting unit detecting a handover for the mobile terminal, and a Bi-casting unit redundantly transmitting, when detecting the handover for the mobile terminal, the same user data addressed to the mobile terminal toward both of the source base station and the target base station. The target base station includes a retaining unit receiving the user data addressed to the mobile terminal, which is transmitted by the U-plane management station, and retaining the user data, and a wireless transmitting unit wirelessly transmitting, when the mobile terminal is wirelessly connected after moving, the user data requested by the mobile terminal in the user data retained by the retaining unit and addressed to the mobile terminal.
Abstract: A mobile station used in a mobile communication system which accepts location registrations from mobile stations in order to perform mobile station location management, the mobile station being comprising a detection means which detects that it is in an overlap region of hierarchical location registration areas; and a delay means which delays location registration when the detection has been made.
Abstract: A new process called a vector approximation graph (VA-graph) leverages a tree based vector quantizer to quickly learn the topological structure of the data. It then uses the learned topology to enhance the performance of the vector quantizer. A method for analyzing data comprises receiving data, partitioning the data and generating a tree based on the partitions, learning a topology of a distribution of the data, and finding a best matching unit in the data using the learned topology.
Abstract: Automated form filling for mobile devices that provides reliable and accurate information to the forms, is easy to use, and is scaleable. A server-side approach is utilized, in which online applications for a mobile device are invoked on a server through a server-side proxy/cache. The proxy scans the content that is generated by the application for transmission to the mobile device to find forms that may be embedded in the content. When a form is encountered, fields of the form are filled with stored information based on automatically generated mapping information.