Abstract: A transmission rate control method for controlling a transmission rate of a channel to which the transmission rate control method is applied, include: notifying, at a radio network controller, at a timing of a call setup or the like, a primary allowable transmission rate of the channel to which the transmission rate control method is applied; starting, at a mobile station, after the call setup, transmission at a transmission rate below the primary allowable transmission rate, when data to be transmitted is generated; and controlling, at the mobile station, the transmission rate of the channel to which the transmission rate control method is applied, based on an Relative Grant Channel transmitted from a radio base station.

Abstract: A CDMA apparatus including a propagation path variation estimator for estimating propagation path variations between respective prior transmit power control sections and a current transmit power control section to obtain propagation path variation estimation values, wherein each of the propagation path variation estimation values is obtained by estimating a propagation path variation between a different corresponding prior transmit power control section and the current transmit power control section; propagation path variation correction part for generating a plurality of corrected products, each corrected product obtained by multiplying at least one of vector, amplitude and/or power of a received signal of the different corresponding prior transmit power control section by said propagation path variation estimation value obtained by estimating the propagation path variation between the different corresponding prior transmit power control section and the current transmit power control section; and averaging p

Abstract: An object of the present invention is to provide a radio quality estimation system, a base station, a mobile station, and a radio quality estimation method whereby, regardless of influence of fading, a radio quality of a predetermined measurement period is more accurately estimated. An interference power calculator calculates an interference-signal power of each of local estimation intervals which are parts of the predetermined estimation interval. An SIR calculator calculates an SIR of the predetermined estimation interval based on the interference-signal powers calculated by the interference power calculator.

Abstract: A transmission rate control method of this invention includes: notifying, at a radio base station Node B, a mobile station UE of a maximum allowable transmission rate of uplink user data, using an absolute rate grant channel (E-AGCH); instructing, at a radio network controller RNC, the mobile station UE to reduce the maximum allowable transmission rate by layer-3 signaling; and reducing, at the mobile station UE, the maximum allowable transmission rate according to the instruction from the radio network controller RNC, and controlling, at the mobile station UE, a transmission rate of the uplink user data based on the reduced maximum allowable transmission rate.

Abstract: A transmission power control method for controlling transmission power of an enhanced dedicated physical data channel for transmitting uplink user data, includes: storing, at a mobile station, a reference transmission format including a transmission data block size which is used in the enhanced dedicated physical data channel, and a gain factor which is a transmission power ratio between the enhanced dedicated physical data channel and a dedicated physical control channel or which is a transmission wave amplitude ratio between the enhanced dedicated physical data channel and the dedicated physical control channel, calculating, at the mobile station, a gain factor of a normal transmission format based on the transmission data block size and the gain factor of the reference transmission format and the transmission data block size of the normal transmission format, and controlling, at the mobile station, a transmission power of enhanced dedicated physical data channel based on the gain factor of the reference tr

Abstract: A reception device comprises an averaging unit configured to calculate at least one of an average value concerning in-phase components and quadrature phase components for a plurality of received data symbols, and an average value of reception power values for the plurality of received data symbols; and an amplitude estimator configured to estimate amplitudes of the plurality of data symbols based on the average value calculated by the averaging unit.

Abstract: An uplink radio resource allocation method allocates, at a radio base station, an uplink radio resource used for uplink user data transmission to a mobile station. The method includes: allocating, at the radio base station, the uplink radio resource, so that total received power in an particular cell of the radio base station is equal to a first target value assigned by a radio network controller; and allocating, at the radio station, the uplink radio resource, so that a ratio of first received power from a serving mobile station to second received power from a non-serving mobile station is equal to a second target value assigned by the radio network controller, a serving cell of the serving mobile station being the particular cell, a non-serving cell of the non-serving mobile station being the particular cell.

Abstract: The object of the present invention is to provide a communication system which makes it possible to avoid a control load from being generated while effectively utilizing the reception capabilities of mobile stations. The communication system includes a category manager 11 configured to categorize reception capability values showing reception capabilities necessary for receiving multicast data in the mobile stations, a reception capability collector 33 configured to collect the reception capability values of the mobile stations, a decider 34 configured to decide a hierarchical structure of the multicast data from a plurality of categories corresponding to the collected reception capability values of the mobile stations and a transmitter 31 configured to transmit the multicast data using the decided hierarchical structure.

Abstract: An uplink radio resource allocation method allocates, at a radio base station, an uplink radio resource used for uplink user data transmission to a mobile station. The method includes: allocating, at the radio base station, the uplink radio resource, so that total received power in an particular cell of the radio base station is equal to a first target value assigned by a radio network controller; and allocating, at the radio station, the uplink radio resource, so that a ratio of first received power from a serving mobile station to second received power from a non-serving mobile station is equal to a second target value assigned by the radio network controller, a serving cell of the serving mobile station being the particular cell, a non-serving cell of the non-serving mobile station being the particular cell.

Abstract: A channel structure of a mobile communication system including a radio base station having a transmission antenna able to control a beam direction for each of a plurality of mobile stations in a cell. The mobile stations carry out radio communication using a shared channel together with an associated dedicated channel used in association with the shared channel. The shared channel is shared by the mobile stations and allocated to each of the mobile stations per predetermined unit transmission. A first pilot channel is set and dedicatedly used for channel estimation of the shared channel, and a second pilot channel is set and dedicatedly used for channel estimation of the associated dedicated channel.

Abstract: 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.

Abstract: The object of the present invention is provide a mobile communication system which can reduce power consumption of a mobile station without increasing the number of times the data signals which are to be received by the mobile station are retransmitted. The base station 10 comprises a signal transmitter 11 configured to transmit the data signal a to the mobile station 30 within a predetermined period, and transmit each of retransmission signals a1 to a3 of the data signal a, in a form different from that of the data signal a, from the base station 10 to the mobile station 30 within the predetermined period A.

Abstract: A communication control apparatus (30, 10) used in a mobile communication system includes: means (32, 12) that derives a second target communication quality Q2 for TFs other than a reference format from a first target communication quality for the reference format in a plurality of TFs provide for communicating with an upper layer of a physical channel; means (33, 13) that derives a third target communication quality different from the first target communication quality from the first and the second target communication qualities; and means that sets the third target communication quality to be a target value of transmission power control.

Abstract: 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.

Abstract: 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. A transmission rate control method according to the present invention includes: transmitting, at the radio base station Node B, a common absolute rate control channel including a priority level and the transmission rate; transmitting, at the mobile station, when the mobile station has data flows of a plurality of priority levels, all the data flows at a transmission rate, which is included in the common absolute rate control channel, corresponding to the highest priority level among the plurality of priority levels.

Abstract: A packet communications system which transmits a packet at a predetermined transmission rate includes a packet size controller configured to change a size of the packet in accordance with available space of a transmission buffer storing the packet, when the predetermined transmission rate is changed.

Abstract: A packet transmission control apparatus which performs transmission control of packets to a plurality of mobile stations includes an acquirer configured to acquire an average transmission rate of packets to each of the mobile stations and a guaranteed transmission rate of the packets; and a scheduler configured to perform scheduling to transmit packets to a specific mobile station preferentially, when an average transmission rate of the packets to the specific mobile station approaches the guaranteed transmission rate.

Abstract: 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.

Abstract: A wireless base station apparatus (100) used in a wireless communications system includes a statistical processing unit (140) that performs statistical processing on downlink radio quality information reported from a wireless communications terminal device; a radio quality information offsetting unit (160) that adjusts the statistically processed downlink radio quality information based on a downlink transmission confirmation (ACK/NACK/DTX) message transmitted from the wireless communications terminal device and a required downlink quality; a transport format determination unit (170) that determines a downlink transport format based on the statistically processed radio quality information or the offset-adjusted radio quality information; and a transmitting unit (111) that transmits a downlink channel with the determined downlink transport format.

Abstract: 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.