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Masafumi Usuda, Tokyo JP

Masafumi Usuda, Tokyo JP

Patent application numberDescriptionPublished
20080200200Transmission Power Control Method And Mobile Station - The present invention enables to reduce deterioration in the radio network capacity on the E-DPCCH, by using the transmission power offset as small as possible while satisfying a quality of the E-DPCCH in a conventional mobile communication system using “EUL”. The present invention relates to a transmission power control method for controlling a transmission power of an uplink control channel (E-DPCCH) at a mobile station UE, including: measuring, at a radio base station Node B, a reception quality of a control signal received through the uplink control channel (E-DPCCH); notifying, at the radio base station Node B, the measurement result to a radio network controller RNC; determining, at the radio network controller RNC, a transmission power offset of the uplink control channel (E-DPCCH) based on the measurement result and notifying the determined transmission power offset to the mobile station UE; and controlling, at the mobile station UE, the transmission power of the uplink control channel (E-DPCCH) by using the transmission power offset.08-21-2008
20080207216Transmission Speed Control Method, Mobile Station, and Radio Line Control Station - The present invention relates to a transmission rate control method for controlling a transmission rate of user data to be transmitted via an uplink by a mobile station. When a serving cell, which performs a scheduling control in an uplink of the mobile station, is configured to transmit, to the mobile station, an absolute rate allocation channel for indicating a maximum allowable transmission rate which is common in the serving cell, and the mobile station is configured to determine the transmission rate of the user data based on the absolute rate allocation channel, a non-serving cell other than the serving cell does not transmit a relative rate allocation channel for adjusting the maximum allowable transmission rate.08-28-2008
20080207243Transmission Power Control Method, Mobile Station, Radio Base Station, and Radio Line Control Station - The present invention relates to a transmission power control method which controls a transmission power of uplink user data for transmitting an uplink user data from a mobile station to a radio base station. The transmission power control method according to the present invention includes: transmitting, from the mobile station to the radio base station, a transmission data block which includes control information periodically, even when user data to be transmitted has not existed in a transmission buffer of the mobile station; notifying, at the radio base station, the number of retransmissions of the transmission data block, to a radio network controller; determining, at the radio network controller, a target SIR of a dedicated physical control channel in the radio base station based on the notified number of retransmissions and notifying the determined target SIR to the radio base station; controlling, at the radio base station, a transmission power of the dedicated physical control channel in the mobile station based on the notified target SIR; and determining, at the radio network controller, a transmission wave amplitude ratio between the uplink user data channel and the dedicated physical control channel based on the notified number of retransmissions and notifying the determined transmission wave amplitude ratio to the mobile station.08-28-2008
20080214123Transmission Rate Control Method and Mobile Station - To control QoS for each mobile station UE while minimizing the affect on radio capacity in the downlink, a transmission rate control method of the present invention comprises: receiving, at a mobile station, a common absolute transmission rate control signal used for a common transmission rate control and a dedicated relative transmission rate control signal used for a dedicated transmission rate control; and setting, at the mobile station, a higher one of a first transmission rate indicated by the common absolute transmission rate control signal and a second transmission rate determined based on the dedicated relative transmission rate control signal, as a transmission rate in an uplink.09-04-2008
20080214227Transmission Power Control Method, Mobile Station, Radio Base Station, and Radio Network Control Station - The present invention performs an outer loop transmission power control in a more stable manner by preventing a status of being unable to detect an Enhanced Dedicated Physical Control Channel (E-DPCCH). A transmission power control method according to the present application includes: generating, at a mobile station UE, a transport block having a predetermined minimum transport block size, when information to be transmitted to a radio base station Node B does not exist; transmitting, from the mobile station UE to the radio base station Node B, the transport block by a transmission timing predetermined by a mobile communication system or a transmission timing notified from a radio network controller RNC; receiving, at the radio base station Node B, the transport block in accordance with the transmission timing; and controlling, at the radio base station Node B, the transmission power, according to a reception quality of the transport block.09-04-2008
20080261606Transmission Rate Control Method, Mobile Station and Radio Network Controller - The present invention can flexibly adjust trade-off between the radio network capacity and the radio quality by changing decrease stop of uplink user data in accordance with the congestion of uplink or the uplink user data type. A transmission rate control method according to the present invention includes the steps of; notifying, at a radio network controller RNC, a decrease pattern of the transmission rate of the uplink user data to a mobile station UE, when setting, with the mobile station UE, a user data channel connection for transmitting the uplink user data; and decreasing, at the mobile station UE, the transmission rate of the uplink user data in accordance with the decrease pattern, when receiving, from a radio bass station Node B, a relative rate control channel RGCH for indicating that the transmission rate of the uplink user data should be decreased.10-23-2008
20080285516Transmitting Method, Receiving Method, Radio Base Station, and Mobile Station - A transmission method according to the present invention includes: concatenating CRC masking data and receiver identification information for identifying the receiver; generating CRC check bits by performing a CRC encoding processing against non-CRC masking data; masking the CRC check bits by the concatenated receiver identification information and CRC masking data; concatenating the masking result and the non-CRC masking data; generating a transmission signal by performing an FEC encoding processing against the concatenated masking result and the non-CRC masking data, which are added; and transmitting the transmission signal to the receiver.11-20-2008
20090036139TRANSFER RATE CONTROL METHOD, MOBILE STATION, AND RADIO BASE STATION - The present invention simplifies management of a transmission rate of data flows of a plurality of priority levels, and reduces load in the mobile station and the radio base station.02-05-2009
20090069017Mobile communication system, mobile station, and radio base station - When an HSDPA and an Enhanced Uplink are applied, a dedicated physical channel, a high speed dedicated physical control channel, and an enhanced dedicated physical control channel are made to follow only a TPC bit of a serving cell; and when a received power of an enhanced dedicated physical data channel is large, a non-serving cell instructs a mobile station UE to reduce the transmission rate of the enhanced dedicated physical data channel so that an interference power from an adjacent cell in an uplink is controlled while communication quality in a downlink is prevented from deteriorating.03-12-2009
20090073927COMMUNICATION CONTROL APPARATUS AND COMMUNICATION CONTROL METHOD - A communication control apparatus (03-19-2009
20090093218TRANSMISSION RATE CONTROL METHOD, MOBILE STATION AND RADIO BASE STATION - In the conventional mobile communication system using an “Enhanced Uplink, the present invention improves a radio quality by preventing a decrease in a transmission rate of uplink user data, the decrease unintended by the radio base station Node B and caused by a false detection of a “Down” command in an RGCH.” A transmission rate control method according to the present invention includes: transmitting, from a radio base station to a mobile station, a relative transmission rate control channel for instructing to decrease the transmission rate of the uplink user data, only when the uplink user data transmitted from the mobile station has been successfully received.04-09-2009
20100048214WIRELESS LINE CONTROL STATION, BASE STATION, MOBILE STATION, MOBILE COMMUNICATION SYSTEM AND MOBILE COMMUNICATION METHOD - A radio network controller includes: a determination unit configured to determine a transmit diversity method to be used to transmit a signal from a base station to a mobile station, in accordance with a soft handover status of the mobile station; and an instruction/notification unit configured to instruct the transmit diversity method to the base station, in accordance with the determination result by the determination unit.02-25-2010
20100222094RADIO NETWORK CONTROLLER AND TRANSMISSION POWER CONTROL METHOD - The radio network controller 09-02-2010
20100284475TRANSMISSION RATE CONTROL METHOD, RADIO BASE STATION AND RADIO NETWORK CONTROLLER - The present invention provides a transmission rate control method for controlling the transmission rate of uplink user data, including the step of; a radio network controller notifies to a radio base station and a mobile station an effective period of an absolute transmission rate control channel, when a call is established or when a serving cell is changed; a radio base station determines whether or not to transmit the absolute transmission rate control channel to each of mobile stations which is performing a communication with the radio base station; and each of the mobile stations determines the transmission rate of the uplink user data, based on a maximum allowable transmission rate mapped to the absolute transmission rate control channel notified by the radio base station.11-11-2010
20110002318MOBILE STATION, BASE STATION, AND MOBILE COMMUNICATION METHOD - It is an objective of the present invention to efficiently use an uplink radio resource, when transmitting user data based on an uplink high efficient transmission method. A mobile station according to the present invention includes a transmission section configured to transmit high efficient uplink data channel frames for transmitting user data based on the uplink high efficient transmission method, so that transmission timings of the high efficient uplink data channel frames are synchronized among mobile stations located in a single area.01-06-2011

Patent applications by Masafumi Usuda, Tokyo JP