Patent application number | Description | Published |
20100275103 | Data Transmission Method, Data Transmission System, Transmitting Method, Receiving Method, Transmitting Apparatus and Receiving Apparatus - In variable rate data transmission, a data transmission method or the like is provided which enables adjustment for achieving desired erroneous rate detection. A transmitting side places a calculated error detecting code after the transmission data in each frame, generates frame data in which an R-bit series before the final bit position of the error detecting code is rearranged in inverse order, and transmits. A receiving side assumes the transmission data and error detecting code by assuming the final bit position of the frame data in each frame, conducting the assumption presuming that the rearrangement in inverse order has occurred on the transmitting side. Among the assumed final bit positions, the position determined to be errorless as a result of the error detection based on the assumed transmission data and error detecting code is determined as the final bit position. R can be greater or less than the number of bits of the error detecting code. | 10-28-2010 |
20110060964 | DATA TRANSMISSION METHOD, DATA RECEPTION METHOD, MOBILE TERMINAL AND RADIO COMMUNICATION SYSTEM - A data transmission method according to the present invention includes the steps of: (A) adding a first CRC code to transmission data; (B) dividing the transmission data to which the first CRC code has been added into a plurality of encoded bit sequences; (C) adding a second CRC code to at least one of the divided encoded bit sequences; (D) performing error correction encoding processing on the encoded bit sequences; and (E) transmitting the encoded bit sequences on which the error correction encoding processing has been performed. | 03-10-2011 |
20150296495 | RADIO COMMUNICATION SYSTEM AND COMMUNICATION CONTROL METHOD - A radio communication system includes at least one user equipment, multiple base stations including a first base station that can execute radio resource control of the user equipment, a second base station that does not execute radio resource control of the user equipment, at least one gateway apparatus, and a switching station that controls a user plane path. The switching station transmits a non-access stratum message to the user equipment through a control plane path established between the first base station and the user equipment in a case in which it is decided that the user plane path should be released, the non-access stratum message instructing the user equipment to release the user plane path. | 10-15-2015 |
20150312810 | RADIO COMMUNICATION SYSTEM AND COMMUNICATION CONTROL METHOD - A radio communication system includes a user device, a first base station, a second base station, a third base station, a gateway device, and a switching center. A user-plane path is established between the user device and the gateway device via the third base station. When the user device is handed over from the first base station to the second base station, the first base station adds an identifier of the third base station to a handover request message and transmits the handover request message to the second base station. The second base station transmits, to the third base station, a base station switch notification message that indicates that a radio connection destination for the user device has been switched to the second base station. | 10-29-2015 |
20150341131 | USER APPARATUS, BASE STATION, INTERFERENCE REDUCING METHOD AND INTERFERENCE REDUCING CONTROL INFORMATION NOTIFICATION METHOD - A user apparatus, in a radio communication system including a plurality of base stations, including a reception unit configured to receive, from a connecting base station, control information to be used for reducing an interference signal sent from an interference base station for the user apparatus; and an interference reducing unit configured to reduce the interference signal by using the control information to obtain a desired signal sent from the connecting base station. | 11-26-2015 |
20150358103 | MOBILE COMMUNICATION TERMINAL - A mobile communication terminal calculates an interference rejection combining reception weight matrix so as to reduce interference with a desired beam by another beam, in which the desired beam is a beam of radio waves transmitted from a desired base station. The mobile communication terminal estimates an interference and noise power expected when the IRC is implemented based on the interference rejection combining reception weight matrix and calculates a signal-to-interference-plus-noise ratio expected when the IRC is implemented based on the interference and noise power. The mobile communication terminal measures or calculates received signal qualities relative to radio waves received from a plurality of base stations, to compensate for the signal-to-interference-plus-noise ratio or the interference and noise power. | 12-10-2015 |
20150358104 | MOBILE COMMUNICATION TERMINAL - A mobile communication terminal calculates an interference rejection combining reception weight matrix based on a vector representing a reference signal transmitted from a desired base station so as to reduce interference with a desired beam of radio waves. The mobile communication terminal estimates, from the interference rejection combining reception weight matrix and the reference signal, an all received power expected when an IRC is implemented, and estimates, from an interference rejection combining weight vector, a channel matrix, and a reference signal sequence, a desired reference signal power expected when an IRC is implemented. The mobile communication terminal subtracts the desired reference signal power from the all received power, thereby estimating an interference and noise power expected when an IRC is implemented, and calculates an SINR expected when an IRC is implemented from the estimated interference and noise power. | 12-10-2015 |
20150358832 | SUPERORDINATE BASE STATION, SUBORDINATE BASE STATION, AND RADIO COMMUNICATION SYSTEM - A superordinate base station, a subordinate base station with control functionality that is more limited than the control functionality of the superordinate base station, a user device that can communicate by radio with the superordinate base station and with the subordinate base station, a switching center, and a gateway device are provided. The superordinate base station has interfaces for control-plane communication and a transceiving unit that performs transceiving with the subordinate base station through an X3 interface. The subordinate base station has an interface for user-plane communication and an X3 interface for communication with the superordinate base station. Operations of the subordinate base station are controlled by control messages transmitted from the superordinate base station. | 12-10-2015 |