Abstract: Provided are a radio base station and a method of receiving a physical control channel which are capable of achieving enhanced data-transmission efficiency of an uplink physical channel when a code division multiple access scheme is used. The radio base station includes: a correlation unit configured to determine a degree of correlation between a code word transmitted from the mobile device through a physical control channel and each replica of the code word, and to then select the replica having a higher degree of correlation than a predetermined degree; an identification unit configured to identify a control information piece contained in the selected replica; and a code-word replica generator configured to reduce the number of the replicas when the control information piece is identified.

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 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: A radio control method is arranged to use a mobile station 10, an active set 20 to perform radio communication with the mobile station 10, and a radio control apparatus 30 for controlling the radio communication between the mobile station 10 and the active set 20, and the radio control method has a determination step wherein in a situation where the mobile station 10, while performing radio communication through A-DPCH with the active set 20, performs radio communication through HS-PDSCH with one radio base station included in the active set 20, the radio control apparatus 30 makes a determination of maintenance to perform a process of maintaining the radio communication through the HS-PDSCH, on the occasion when the mobile station 10 gives a change command to change a configuration of the active set 20 so as to result in failure in maintenance of the radio communication through the HS-PDSCH.

Abstract: A packet transmission control apparatus comprising a storage unit configured to store a transmission resource usable for transmission of the packet, channel quality information on the downlink, and a transmission method used for transmission of the packet in association with each other; a determination unit configured to determine the transmission method used for transmission of the packet with reference to the storage unit based on the channel quality information on the downlink reported from a mobile station and the transmission resource usable for transmission of the packet; a redetermination unit configured to redetermine the transmission method used for transmission of the packet so as to minimize a padding portion in a transport block that forms the packet; and a packet transmission unit configured to transmit the packet with the redetermined transmission method.

Abstract: A communication control method for a mobile communication system having a plurality of mobile stations, a radio base station, and a radio control station comprises a measurement step, an evaluation step, and a control step. In the measurement step, a plurality of congestion parameters related to factors generating congestion is measured in a mobile communication system. In the evaluation step, the radio control station evaluates a congestion degree corresponding to each of the plurality of congestion parameters. In the control step, a communication setting between the radio base station and at least one of the plurality of mobile stations is controlled in accordance with a control instruction transmitted from the radio control station to the radio base station when at least one of the plurality of congestion degrees is a prescribed level or more.

Abstract: The present invention relates to a mobile communication system which includes a base station, a mobile station for performing a communication with the base station, and a radio network controller for controlling the communication between the base station and the mobile station. The mobile communication system comprises a controller configured to control a communication state of the communication between the base station and the mobile station according to a congestion state of an uplink.

Abstract: The present invention relates to a packet transmission control device which controls transmission of packets to a plurality of mobile stations. A scheduling unit of the packet transmission control device according to the present invention is configured to schedule the packets to each of the plurality of mobile stations, based on an average transmission rate, a minimum guaranteed transmission rate, a scheduling frequency and capability information.

Abstract: A communication control method includes the step of restricting the number of communication channels used dedicatedly by each of mobile stations or a resource of communication channels used dedicatedly by each of the mobile stations when both communication channel shared by the mobile stations and communication channels used dedicatedly by each of the mobile stations are simultaneously used in a mobile communication system.

Abstract: A packet transmission control device relating to the present invention includes: a storage unit configured to store a transmission resource available for use in the packet transmission, radio quality information on the downlink, and a transmission method to be used in the packet transmission while associating them with one another; a determination unit configured to determine a transmission method to be used in the packet transmission on the basis of the radio quality information, on the downlink reported from the mobile stations and the transmission resource available for use in the packet transmission, by referring to the storage unit; and a packet transmission unit configured to transmit the packet by using the determined transmission method.

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: A call admission control device efficiently controls admission of a new call. In a scheduling operation, a congestion state in a cell is estimated based on the number or ratio of the mobile stations whose average transmission data rates have been initialized, and call admission control is performed, thereby appropriately performing the call admission control regardless of the occurrence of traffic or a mode of a cell.

Abstract: Call admission control is performed by considering whether or not a mobile station that has already performed communications and a mobile station that is newly starting communications can attain respective target transmission data rates. A new call admission judgment unit controls admission of a call from a new mobile station based on a packet allocation frequency for satisfying an existing terminal target transmission data rate relating to a plurality of mobile stations and a packet allocation frequency for satisfying a new terminal target transmission data rate relating to a new mobile station. Call admission control can be appropriately performed based on whether or not a target transmission data rate can be satisfied regardless of the cell mode and the way of the occurrence of traffic on a mobile station which has already started communications and a mobile station which is to newly start communications.

Abstract: When n mobile stations performing communications using a shared channel and m mobile stations performing communications using a dedicated channel are used in a mixed manner, necessary radio resources to satisfy the transmission data rate aimed by a mobile station performing communications using a shared channel are calculated, the quality of the shared channel is guaranteed, and call admission control of a dedicated channel is performed. An HS terminal allocation power calculation unit calculates necessary transmission power to satisfy the target transmission data rate by n mobile stations based on the radio channel quality and the target transmission data rate of the n mobile stations using a shared channel.

Abstract: In a communication system which transmits a packet to a plurality of mobile stations classified into a plurality of priority classes, call admission control is realized with a priority class taken into account. When a new mobile station is starting communications, the number of mobile stations which belong to a plurality of priority classes is calculated by a mobile station number acquisition unit. A weight coefficient setting unit sets a weight coefficient for each of the plurality of priority classes. A first threshold value setting unit and a second threshold value setting unit set a threshold value for each of the plurality of priority classes. A first call number judgment unit and a second call number judgment unit control admission of a call by a new mobile station based on the number of mobile stations belonging to the plurality of priority classes, the weight coefficient for each of the plurality of priority classes, and the threshold value of each of the plurality of priority classes.

Abstract: A packet transmission control device and a packet transmission control method for reducing degradation of system throughput due to a wireless mobile station in an abnormal state, in controlling transmission of packets to each of a plurality of wireless terminals. A channel is assigned based on an evaluated value from an evaluation function containing an average transmission rate value for the wireless terminal in its denominator, and if the evaluated value falls in an abnormal value, the average transmission rate value is initialized to reduce the frequency of assigning packets to the wireless terminal if one of multiple wireless terminals transitions to an abnormal state. By initializing the average transmission rate value, a phenomenon that an unnecessarily large number of shared channels are assigned to a wireless mobile station in an abnormal state may be avoided to prevent degradation of overall system throughput.

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: A packet transmission control apparatus is configured to perform transmission control of packets to a plurality of mobile stations. The packet transmission control apparatus includes an acquirer configured to acquire a scheduling frequency which shows a frequency of scheduling of packets to each mobile station In a predetermined period, and a scheduler configured to control scheduling of packets to each mobile station In accordance with an acquired scheduling frequency.

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: 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.