Abstract: Immediately before transmitting a packet signal, a packet transmission base station (BS1) increases a target ISR of UL DPCH (S12), increases the TPC transmission power transmitted by the DPCH (S13), increases a power balancing reference power, and increases a DL DPCH transmission power (S14). In a mobile station (MS3), during packet reception, only a packet transmission base station (1) controls the UL DPCH transmission power (S15). This improves the reception quality at the base station (1) of HS-DPCCH including ACK/NACK and reduces the error ratio of the ACK/NACK signal.

Abstract: The invention provides a radio base station which can achieve high throughput while attaining the target quality for each mobile station and fairly assigning a transmission opportunity. In the radio base station, when a mobile station selection unit is notified at a fixed period of time by a data flow control unit with respect to a mobile station which has data to be transmitted, the unit selects a plurality of mobile stations which don't achieve the service quality. The plurality of mobile stations selected by the mobile station selection unit are input into a PF scheduler. From these mobile stations, a mobile station to which a transmission opportunity is assigned, is determined. A mobile station notification unit assigns a transmission opportunity to the mobile station determined by the PF scheduler.

Abstract: When performing base station selection type transmission power control, transmission of the dedicated physical control channel signal by non-transmitting base stations is halted while minimizing the impact on uplink transmission power control. This decreases downlink interference and increases downlink channel capacity. At a base station, reception quality measuring unit 506 compares the measured uplink reception quality with a target quality, forms a TPC signal on the basis of the results of this comparison, and communicates the contents of this TPC signal to transmission power controller 507. When the base station in question is a non-transmitting base station, transmission power controller 507 transmits the dedicated physical control channel signal only if the contents of the communicated TPC signal instruct a decrease, and otherwise halts transmission of the dedicated physical control channel signal.

Abstract: Pluralities of state update frames are defined. The base station is configured to transmit a state update data to instruct the mobile station to be set to either an active state or a suspended state, in the state update frames. The base station is configured to transmit a packet only to the mobile station that has been set to the active state by the state update data. The base station notifies the mobile station of a packet transmission by transmitting a control data including a data necessary to receive the packet, earlier than the packet transmission by a predetermined time. The mobile station is configured to receive the control data and the packet when being set to the active state, and is configured to not receive the control data and the packet when being set to the suspended state.

Abstract: The present invention provides a radio base station which can equally assign a transmission opportunity based on the radio channel quality. A mobile station selection unit issues a request for a metric notification to a metric notification unit corresponding to a mobile station notified by a data flow control unit, and receives metrics. The metric notification unit periodically receives radio channel quality information from a channel quality notification unit of an uplink signal analysis unit, obtains through a rank calculation unit the rank at the time when the channel quality is preferably arranged in a channel quality buffer according to the radio channel quality information, and notifies the mobile station selection unit of the result as metrics. The mobile station selection unit selects a mobile station having the smallest metrics notified by the metric notification unit, assigns radio resources to the mobile station, and notifies the data flow control unit of the assignment.

Abstract: To provide a cellular system for enhancing precision of judgement by rendering the number of code words to be judgement candidates at a base station as small as possible and thus improving the efficiency of using the code words. A base station control unit notifies the base station of the maximum number of the base stations on which a mobile station may set up links to allow the base station to limit the code word judgement candidates that may be received. Accordingly, it is possible to increase the distance between the codes among the code words to be the judgement candidates, consequently allowing the base station to reduce judgement errors of the code word.

Abstract: There is provided a mobile communication system capable of reducing the power consumption in the packet wait state and promptly transmitting a packet when data transmission is requested. At a predetermined synchronization establishment interval start time (T1), a base station starts transmission of DPCH (DL) which is a downlink individual channel. A mobile station receives the DPCH (DL) and starts synchronization establishment operation. If the synchronization of the DPCH (DL) is not established by the synchronization establishment interval end time (T2), the synchronization establishment operation is continued.

Abstract: A mobile communication system includes a base station and a mobile station. The base station includes a transmitting/receiving section that transmits/receives a packet to/from the mobile station. The base station also includes a base station state updating section that notifies the mobile station of transmission/reception state update information that indicates update of a packet receivable state in the mobile station. The mobile station includes a mobile station transmitting/receiving section that transmits/receives the packet to/from the base station. The mobile station also includes a mobile station state updating section that sets, on the basis of the transmission/reception state update information, one of an active state in which the control information for packet transmission can be received and a suspend state in which the control information for packet transmission cannot be received.

Abstract: In a cellular system, each mobile station concurrently linked to plural link base stations in soft handover state and receiving packet from the packet-transmitting base station controls a transmission power of an up-link dedicated physical channel based on a first transmission power control information included in down-link dedicated physical channels of the link base stations. In other state, the mobile station controls the transmission power based on a second transmission power control information included in a down-link dedicated physical channel of the packet-transmitting base station. This accelerates the power increase up to a target power level causing that the measured signal-to-interference-ratio at the packet-transmitting base station reaches a target signal-to-interference-ratio, thereby improving receiving quality of control signal from the mobile station at the packet-transmitting base station.

Abstract: To decrease the number of base stations transmitting when a mobile station is connected to a plurality of base stations during handover and to let a base station having the best reception quality perform transmission so as to decrease interference in downlink and increase the link capacity. A mobile station periodically measures a pilot signal transmitted from a base station in a reception monitor 406 and estimates its own movement speed at predetermined intervals based upon the reception electric field strength of the pilot signal in a speed estimate device 407 in soft handover state. A time length for measuring the pilot signal transmitted from the base station corresponding to the movement speed and an inner threshold value for deciding transmission base stations during handover are altered in a control section 408.

Abstract: When performing base station selection type transmission power control, transmission of the dedicated physical control channel signal by non-transmitting base stations is halted while minimizing the impact on uplink transmission power control. This decreases downlink interference and increases downlink channel capacity. At a base station, reception quality measuring unit 506 compares the measured uplink reception quality with a target quality, forms a TPC signal on the basis of the results of this comparison, and communicates the contents of this TPC signal to transmission power controller 507. When the base station in question is a non-transmitting base station, transmission power controller 507 transmits the dedicated physical control channel signal only if the contents of the communicated TPC signal instruct a decrease, and otherwise halts transmission of the dedicated physical control channel signal.

Abstract: When performing base station selection type transmission power control, transmission of the dedicated physical control channel signal by non-transmitting base stations is halted while minimizing the impact on uplink transmission power control. This decreases downlink interference and increases downlink channel capacity. At a base station, reception quality measuring unit 506 compares the measured uplink reception quality with a target quality, forms a TPC signal on the basis of the results of this comparison, and communicates the contents of this TPC signal to transmission power controller 507. When the base station in question is a non-transmitting base station, transmission power controller 507 transmits the dedicated physical control channel signal only if the contents of the communicated TPC signal instruct a decrease, and otherwise halts transmission of the dedicated physical control channel signal.

Abstract: To provide a mobile communication system in which high-speed transmission to a mobile station located in the vicinity of a cell boundary can be performed without causing any deterioration in a mobile station line quality. A HS-PDSCH data transmission timing detection portion of a base station executes a program stored on a recording medium to check a HS-PDSCH data transmission timing notice from the mobile station, to receive the transmission timing notice, and to send this notice to a control portion. The control portion controls a power for transmission of HS-PDSCH data from a modulation and encoding portion in response to the transmission timing notice from the HS-PDSCH data transmission timing detection portion. Also, when the base station transmits HS-PDSCH data to the mobile station, the control portion operates so as to make a HS-PDSCH data transmission timing notification portion send out HS-PDSCH data transmission timing information to the mobile station.

Abstract: There is provided a mobile radio communication system which is capable of reducing a group ID in length with respect to the number of mobile stations and realizing efficiency of air resources. Suspend control of mobile stations is performed by notifying not only control information but also transmission/reception state update information for instructing a state [Active/Suspend] in a status update frame set in advance from a base station to the mobile stations using an HS-SCCH. The base station performs the suspend control by sending, in state update information at timing of a state update frame number of a user ID allocated in advance, a group ID of a user ID allocated to mobile stations desired to be made Active in advance.

Abstract: When performing base station selection type transmission power control, transmission of the dedicated physical control channel signal by non-transmitting base stations is halted while minimizing the impact on uplink transmission power control. This decreases downlink interference and increases downlink channel capacity. At a base station, reception quality measuring unit 506 compares the measured uplink reception quality with a target quality, forms a TPC signal on the basis of the results of this comparison, and communicates the contents of this TPC signal to transmission power controller 507. When the base station in question is a non-transmitting base station, transmission power controller 507 transmits the dedicated physical control channel signal only if the contents of the communicated TPC signal instruct a decrease, and otherwise halts transmission of the dedicated physical control channel signal.

Abstract: A transmission power control method and an apparatus, which includes a base station and a mobile stations, can lower a transmission power of a counterpart station and assure a communication quality, such as a desired bit error ratio, block error ratio, and so forth. A control reference value is set for generation of a control instruction controlling the transmission power of the counterpart station in a closed loop, when error correction coding and interleaving are used together. The transmission power control method includes steps of receiving a signal transmitted from a communication counterpart station, measuring a reception quality value of each received time slot, control instruction determining step of periodically determining a control instruction depending upon the reception quality values of the plurality of slots and transmitting the control instruction to the counterpart station, whereby the control instruction is used for transmission power control of the counterpart station.

Abstract: When performing base station selection type transmission power control, transmission of the dedicated physical control channel signal by non-transmitting base stations is halted while minimizing the impact on uplink transmission power control. This decreases downlink interference and increases downlink channel capacity. At a base station, reception quality measuring unit 506 compares the measured uplink reception quality with a target quality, forms a TPC signal on the basis of the results of this comparison, and communicates the contents of this TPC signal to transmission power controller 507. When the base station in question is a non-transmitting base station, transmission power controller 507 transmits the dedicated physical control channel signal only if the contents of the communicated TPC signal instruct a decrease, and otherwise halts transmission of the dedicated physical control channel signal.

Abstract: A mobile communication system according to the present invention is provided with a base station and a mobile station that communicates with the base station. In a communication protocol between the base station and the mobile station, a plurality of state update frames are defined in a time domain. The base station is configured to transmit a state update data to instruct that the mobile station is set to either an active state or a suspended state, in each of the plurality of the state update frames. At the same time, the base station is configured to transmit a packet only to the mobile station that has been set to the active state by the state update data. The base station in advance notifies the mobile station of packet transmission by transmitting a control data including a data necessary to receive the packet, earlier than the packet transmission by a predetermined time difference. The mobile station is set to either the active state or the suspended state in response to the state update data.

Abstract: In case of making site selection diversity transmit power control, all handover base stations are enabled for transmission depending on a state of the transmission power value of a dedicated data signal from the base stations, thereby preventing a trafic capacity from decreasing due to an increase in the transmission power of a dedicated control signal at a non-transmitting base station, or a received signal quality from degrading at a mobile station because the transmission power value of the transmitting base station reaches a maximum transmission power of base station. A mobile station measures a common pilot signal and a dedicated control signal transmitted from each handover base station by means of a receiving monitor, estimates the transmission power value of the dedicated control signal at each handover base station from a difference thereof, and estimates a difference in the transmission power value of the dedicated control signal between the handover base stations.

Abstract: There is provided a mobile communication system capable of reducing the power consumption in the packet wait state and promptly transmitting a packet when data transmission is requested. At a predetermined synchronization establishment interval start time (T1), a base station starts transmission of DPCH (DL) which is a downlink individual channel. A mobile station receives the DPCH (DL) and starts synchronization establishment operation. If the synchronization of the DPCH (DL) is not established by the synchronization establishment interval end time (T2), the synchronization establishment operation is continued.