Abstract: A communicating unit of a base station performs a plurality of periodic communication services with a wireless terminal. A communication control unit of the base station includes, in a control channel, identification information for distinguishing the periodic communication services one from the other to thereby allow the wireless terminal to control at least one of activation and release of each of the periodic communication services. A communicating unit of the wireless terminal performs the plurality of periodic communication services with the base station. A communication control unit of the wireless terminal controls at least one of the activation and the release of each of the periodic communication services using the identification information included in the control channel transmitted from the base station.

Abstract: When completing radio communication with a radio terminal, a transmitting unit of a base station transmits to the radio terminal a validity period of control information on radio communication which has been used to communicate with the radio terminal. When starting radio communication with the radio terminal within the validity period, a communication unit of the base station performs radio communication with the radio terminal without performing a process of exchanging control information. When completing radio communication with the base station, a receiving unit of the radio terminal receives a validity period from the base station. When starting radio communication with the base station within the validity period, a communication unit of the radio terminal performs radio communication with the radio terminal without performing a process of exchanging control information.

Abstract: A base station which is able to perform radio communications with a relay station and a mobile station, the base station includes a transmitter configured to transmit radio signals to the relay station in downlink backhaul subframes, and to limit transmission of radio signals to the relay station in subframes other than the downlink backhaul subframes; and a controller configured to allow, when performing a random access procedure to the relay station, the transmitter to transmit a message of the random access procedure even in the subframes other than the downlink backhaul subframes.

Abstract: A radio communication system includes a base station and a mobile station. The base station includes a controller that changes communication configurations when a plurality of communications with the mobile station at respective periodic communication intervals are scheduled to occur at the same communication timing so as to control to resolve simultaneous communications. The mobile station comprises a controller that performs communications with the base station using the communication configurations changed by the controller in the base station.

Abstract: A base station which is able to perform radio communications with a relay station and a mobile station, the base station includes a transmitter configured to transmit radio signals to the relay station in downlink backhaul subframes, and to limit transmission of radio signals to the relay station in subframes other than the downlink backhaul subframes; and a controller configured to allow, when performing a random access procedure to the relay station, the transmitter to transmit a message of the random access procedure even in the subframes other than the downlink backhaul subframes.

Abstract: A communication apparatus includes a memory and a processor coupled to the memory and configured to transmit a first content acquisition request to a first server apparatus via a first base station apparatus, receive a content, requested by the first content acquisition request, from the first server apparatus via the first base station apparatus, and change, in a case where coupling is switched from the first base station apparatus to a second base station apparatus in a handover process, a transmission destination address in a second content acquisition request to be transmitted to the second base station apparatus, from a first address of the first server apparatus coupled to the first base station apparatus to a second address of a second server apparatus coupled to the second base station apparatus.

Abstract: A communication control device includes a traffic monitoring unit, the number of ranks calculation unit, a rank value calculation unit, a communication control unit, and a download unit. The traffic monitoring unit monitors a traffic amount between a content server and a base station. The number of ranks calculation unit calculates the number of rank values that servers as a reference for determining a download destination mobile station of data based on a monitoring result by the traffic monitoring unit. The rank value calculation unit calculates the rank value for each mobile station using the number and radio communication quality of a plurality of mobile stations. The communication control unit determines the download destination mobile station in order from a mobile station having a high rank value at a determination timing. The download unit downloads the data to the mobile station determined as the download destination.

Abstract: A communication unit of a radio terminal performs radio measurement of a base station and monitoring of a paging signal within a periodic duration. A controller controls the communication unit so as to perform filtering of the radio measurement within the duration with intervals less than half of the duration.

Abstract: A relay station which performs radio communications with a base station and a mobile station, the relay station includes: a receiver configured to receive radio signals from the base station in downlink backhaul subframes, and to limit reception of radio signals from the base station in subframes other than the downlink backhaul subframes; and a controller configured to allow, when performing a random access to the base station, the receiver to receive a message of the random access even in the subframes other than the downlink backhaul subframes.

Abstract: A communication control apparatus includes a communication quality determining unit, a rank value calculating unit, and a download control unit. The communication quality determining unit acquires wireless communication qualities of a plurality of mobile stations. The rank value calculating unit calculates a reference value to determine mobile stations to be data download destinations by using the wireless communication qualities acquired by the acquiring unit, compares the reference values of the respective mobile stations at a first time point, and determines mobile stations to be the data download destinations in order from a mobile station whose reference value is the highest based on results of the comparison. The download control unit downloads data to the mobile stations determined as the data download destinations by the rank value calculating unit.

Abstract: A communication unit of a radio terminal performs radio measurement of a base station and monitoring of a paging signal within a periodic duration. A controller controls the communication unit so as to perform filtering of the radio measurement within the duration with intervals less than half of the duration.

Abstract: In a radio communication system in which a radio communication apparatus performs communication with another apparatus via a radio relay apparatus, a communication quality value indicating communication quality between the radio communication apparatus and the radio relay apparatus is measured, a threshold for deciding a level of the communication quality is determined on the basis of a past tendency of the communication quality value, and transmission of contents between the radio communication apparatus and the other apparatus is blocked while a present value of the communication quality is smaller than the threshold.

Abstract: A communication apparatus that performs receiving processing of data transmitted at timings of a predetermined interval, the communication apparatus includes: a transmitting unit configured to transmit a signal indicating that data is successfully received when the data transmitted at Mth timing according to the predetermined interval is successfully received; and a control unit configured to determine whether or not a retransmission control processing is performed when the signal indicating that the data is successfully received is transmitted, wherein the control unit transmits a signal indicating that the data is successfully received when the retransmission control processing is performed.

Abstract: A reordering method of sending packets, to which numbers indicating the packet order are added, to a mobile station from a base station, and rearranging the order of the packets at the mobile station, this includes forwarding from a source base station to a target base station, packets, not sent to the mobile station before a handover sequence, or packets, a confirmation response of proper reception has not been received from the mobile station, transmitting preferentially those packets from the target base station to the mobile base station and then transmitting packets received from a host station to the mobile station, giving packets information indicating that the packets are jump packets when transmitting the packets to the mobile station, received from the host station with the order jumped, deciding jump packets are not objects of reordering, and performing the reordering process for packets that are objects of reordering.

Abstract: A control apparatus in a communication system including a base station and terminals, the control apparatus including: a memory, and a processor coupled the memory and configured to receive data addressed to M terminals (where M is a natural number equal to or greater than 2) of the terminals, and to transmit the received data to the base station, such that N terminals (where N is a natural number less than M) of the M terminals are scheduled in the same timing by the base station.

Abstract: A radio resource allocation method for use in a radio telecommunication system for a first radio telecommunication apparatus and a second telecommunication apparatus carrying out a radio telecommunication by using an allocated radio resource, comprising selecting a resource allocation pattern identifying a combination of radio resources allocatable within a resource management space from among a pre-prepared plurality of resource allocation patterns, and notifying the second radio telecommunication apparatus of pattern identifier information identifying the selected resource allocation pattern and of startup position information thereof within the resource management space.

Abstract: A control method in a mobile communication system, that includes configuring a discard timer corresponding to a service data unit (SDU) for discarding the SDU according to a value of the discard timer that indicates a time elapsed since the discard timer started at reception of the SDU; when a handover is performed, maintaining the value of the discard timer corresponding to the SDU and taking over the elapsed time of the SDU; and discarding the corresponding SDU when the value of the discard timer reaches a given value.

Abstract: A mobile communication system having a user equipment that performs transmission process having transmission timing adjustment information and a base station that receives a signal sent from the user equipment, the mobile communication system includes, if a timer controlling a term of application of first transmission timing adjustment information expires before transmission of a signal including identification information of the user equipment is performed during a connection process including reception of second transmission timing adjustment information while the user equipment has the first transmission timing adjustment information and performing the connection process to the base station, the user equipment does not transmit the signal.

Abstract: A radio communication system that includes an encoder configured to perform error correction coding for control channel information by a given error correction coding rate; a modulator configured to perform modulation of the error correction coded control channel information for transmission according to a given modulation scheme; and a processing section configured to perform code decimation of the error correction coded control channel information prior to the modulation, the code decimation being different according to whether the Multi Input Multi Output is applied or not.

Abstract: A relay station which performs radio communications with a base station and a mobile station, the relay station includes: a receiver configured to receive radio signals from the base station in downlink backhaul subframes, and to limit reception of radio signals from the base station in subframes other than the downlink backhaul subframes; and a controller configured to allow, when performing a random access to the base station, the receiver to receive a message of the random access even in the subframes other than the downlink backhaul subframes.