Patent application number | Description | Published |
20090067424 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING A DATA BLOCK IN A WIRELESS COMMUNICATION SYSTEM - The invention provides methods and apparatus for transmitting and receiving a source data block in a wireless communication system using hybrid automatic retransmission request protocol. According to the scheme provided by the invention, at transmitting side, the source data block or part of source data block that is not decoded correctly at receiving side is divided into a plurality of data segments, each the plurality of data segments may be paded with known data to expand the data segments to be a predetermined lengthen, the data segment is encoded with linear code to be a data packet including the data segment and a redundancy information segment or including only redundancy information, and after that the encoded data packets are transmitted. At the receiving side, when each of the received data packets includes a data segment and a redundancy information segment, decoding is performed directly based on the received data packet, decoding is performed based on the received redundancy information segment and an data segment and redundancy information segment extracted from buffered data packets with a first and second chance to restore the data segment that is not decoded correctly in previous decoding processing. With the additional decoding chance, the scheme provided by the invention can improve decoding probability and thus the transmission efficiency of the system. | 03-12-2009 |
20090252245 | TRANSMISSION METHOD AND APPARATUS FOR CANCELLING INTER-CARRIER INTERFERENCE - The present invention provides a transmission method and apparatus for cancelling inter-carrier interference in wireless communication systems. Particular carriers are not used for data transmission but carry weighted data to cancel the ici interference of a first group of interfering sub-carriers onto a second group of victim sub-carriers. The weights are inversely proportional to the frequency offset between the interfering sub-carriers and the victim sub-carriers. | 10-08-2009 |
20090310687 | METHOD AND APPARATUS FOR SPACE-TIME-FREQUENCY ENCODING AND DECODING - The present invention provides a space-time-frequency encoding and decoding method and apparatus used in a wireless communication system. With the encoding method provided in the invention, transmission code words and their redundant elements are properly allocated on space-time-frequency units, so that the transmission codes and their partial redundancies can be transmitted via different antennas. Accordingly, at the receiving side, the redundant elements and the corresponding code word elements can be combined, so as to enhance the SNR and diversity gains for a part of the elements in the code words, and hence enhance the reception quality for the overall data stream. | 12-17-2009 |
20100177741 | METHOD FOR RESOURCE UNIT ALLOCATION FOR WIRELESS COMMUNICIATION, SUBSCRIBER STATION AND BASE STATION - A method for wireless communication between a base station and a plurality of subscriber stations is described wherein a communication capacity is partitioned in resource units at least by code multiplexing, which resource units are distributed by the base station over said devices, wherein data from each subscriber station is spread by means of a signature sequence, characterized in that multiple resource units assigned to a common subscriber station have the same signature sequence. | 07-15-2010 |
20100232532 | METHOD AND APPARATUS OF SPACE-TIME-FREQUENCY CODING - The invention relates to a space-time-frequency encoding for use in wireless communication systems. According to the encoding scheme provided by the invention, it first transforms a plurality of input element pairs into a plurality orthogonal element pairs respectively, each of the plurality of input element pairs and corresponding orthogonal element pair forming an orthogonal matrix; and then maps the first element, second element and the redundancy of the second element in each of the plurality of input element pairs and corresponding orthogonal element pair as channel elements to three predetermined time-frequency cells in a first and second two-dimension time-frequency matrix so as to make the channel elements in the first and second matrixes suitable for being transmitted via different antennas. As the redundant input element pairs and corresponding orthogonal element pairs transmitted via different antenna are orthogonal in both space-time domain and space-frequency domain at the same time, and thus two-dimension space-time transmit diversity gain and space-frequency transmit diversity gain can be achieved at the same time. | 09-16-2010 |
20100322102 | UPLINK FEEDBACK IN A MULTIMEDIA BROADCAST/MULTICAST SERVICES (MBMS) WIRELESS COMMUNICATIONS SYSTEM - A technique for managing uplink feedback involves establishing a channel quality threshold range, for example, in terms of a channel quality indicator (CQI), broadcasting the channel quality threshold range to the mobile stations and using the channel quality threshold range to control the feedback of channel quality information. For example, the mobile stations determine their own mobile station-specific CQI and then generate CQI feedback information in response to a comparison between their own mobile station-specific CQI and the CQI threshold range. In an embodiment, if the CQI of a mobile station falls within the CQI threshold range, then the mobile station can transmit a reduced set of CQI feedback information. For example, the reduced set of CQI feedback information may be a single bit that indicates whether the mobile station-specific CQI is greater than or less than a CQI threshold or whether the CQI has crossed a CQI threshold. | 12-23-2010 |
20110007668 | DYNAMIC MBSFN AREA CONFIGURATION METHOD IN CONSIDERATION OF RADIO RESOURCE EFFICIENCY AND SYSTEM THEREOF - A method and system determines an absolute Multicast-Broadcast Single Frequency Network (MBSFN) configuration based on a threshold. First saved radio resources and first wasted radio resources are calculated. The absolute MBSFN configuration is set as the final MBSFN configuration when the first saved radio resources are greater than or equal to the first wasted radio resources. When untrue, the absolute MBSFN configuration plus an adjacent cell pool is set as the final MBSFN configuration based on the final MBSFN configuration achieving a maximum value of second saved radio resources minus second wasted radio resources. When both of these conditions are untrue, the absolute MBSFN configuration minus an MBSFN cell pool is set as the final MBSFN configuration based on the final MBSFN configuration achieving a maximum value of third saved radio resources minus third wasted radio resources. | 01-13-2011 |
20110166917 | VIEWER CREDIT ACCOUNT FOR A MULTIMEDIA BROADCASTING SYSTEM - An ad token apparatus for managing a user credit account in a multimedia broadcasting system. The ad token apparatus includes a token embedder, a token cache, and a token verifier. The token embedder embeds a token in a digital advertisement stream to generate a token-embedded ad. The token includes an identifiable sequence of data of a predetermined length. The token cache stores the token and receives a detected token from the user device in response to detection of the token in the token-embedded ad by the user device. The token verifier adds at least one credit to a user credit account in response to receipt of the detected token. The user credit account corresponds to the user device. | 07-07-2011 |
20130055862 | PORTABLE COMPACT THREADING MACHINE - A powered threading machine is described. The threading machine is compact and portable. The threading machine includes a tube frame having a rearward wheel assembly and an extendable handle at the front of the machine. A particular sump configuration is used to prevent loss of cutting oil during operation and transport of the machine. | 03-07-2013 |
20130308587 | TRANSMISSION METHOD AND APPARATUS FOR CANCELLING INTER-CARRIER INTERFERENCE - The present invention provides a transmission method and apparatus for cancelling inter-carrier interference in wireless communication systems. Particular carriers are not used for data transmission but carry weighted data to cancel the ici interference of a first group of interfering sub-carriers onto a second group of victim sub-carriers. The weights are inversely proportional to the frequency offset between the interfering sub-carriers and the victim sub-carriers. | 11-21-2013 |
20140057032 | DEVICE AND METHOD FOR PRODUCING A BEVERAGE - The disclosure proposes a method of producing a beverage, comprising the steps of introducing a first portion of solvent into a container ( | 02-27-2014 |
20140299006 | SOYMILK MAKER - The invention proposes a soymilk maker and a method of making soymilk, using the soymilk maker. The soymilk maker comprises a container for receiving the bean or soymilk; a machine head arranged on the upper portion of the container, the machine head having a motor accommodated therein; a rotary cutter driven by the motor; a collection unit arranged within the container for collecting the testa and residue; an adjusting mechanism arranged on the machine head and being adjustable to enable the collection unit to move within the container between a first position where the beans are processed and a second position where the testa or residue is collected in the collection unit. Such a configuration enables testa and residue to be collected in the collection unit without said unit being equipped with a separate filter and a separate cup. | 10-09-2014 |