Abstract: A radio communication system is disclosed that includes at least one user equipment and multiple base stations including a first base station configured to execute radio resource control of the user equipment through a control path and a second base station configured not to execute radio resource control of the user equipment. The system includes multiple gateways, including a first gateway connected with the first base station and a second gateway connected with the second base station, and a switching station that controls the establishment of user paths among nodes.

Abstract: In order to solve problems with “distributed RLCs” and “independent RLCs,” a mobile communication method according to this embodiment includes: a step A of causing a radio base station eNB#1 to generate a PDCP-PDU addressed to a mobile station UE; a step B of causing the radio base station eNB#1 to associate the generated PDCP-PDU and an RLC-SN with each other and transmit the PDCP-PDU and the RLC-SN to a radio base station eNB#2; a step C of causing the radio base station eNB#2 to generate an RLC-PDU addressed to the mobile station UE by using the received PDCP-PDU and RLC-SN; and a step D of causing the radio base station eNB#2 to transmit the generated RLC-PDU to the mobile station UE.

Abstract: Even in the case of satellite communications to which LTE is applied, a difference between reception timings of uplink singles transmitted from a plurality of mobile stations UE located in the same cell is kept within GI specified in LTE. A mobile station UE#1 according to the present invention includes: an offset calculation unit 23 configured to calculate an offset ? from a transmission timing to be referenced, based on a distance Lx between the mobile station UE#1 and a satellite 1 used in satellite communications, and a distance Lref between the satellite 1 and a reference mobile station UE; and an RACH functional unit 24 configured to adjust a transmission timing of a random access preamble based on the calculated offset ?.

Abstract: User equipment for implementing 3D MIMO (3-Dimensional Multiple-Input Multiple-Output) communication includes: a transmission and reception unit configured to transmit and receive radio signals to/from a base station in the 3D MIMO communication; and a codebook management unit configured to have a first codebook and a second codebook. The codebook management unit determines a 3D codebook for the 3D MIMO communication by combining the first codebook with the second codebook, and the transmission and reception unit feeds the first codebook and the second codebook serving as a basis of calculating the determined 3D codebook back to the base station.

Abstract: A base station performs the combination of digital precoding and analog beamforming. Transceiving antenna elements are classified into antenna groups. The analog beamformer includes branches corresponding to the antenna groups. Each branch includes sub-branches, and each sub-branch is connected to one antenna element. In self-calibration, after pilot signals are transmitted from antenna elements belonging to an antenna group and are received by antenna elements belonging to another antenna group, it is identifiable as to which antenna element transmitted each pilot signal. After pilot signals are received by antenna elements belonging to an antenna group, it is identifiable as to which antenna element received each pilot signal.

Abstract: A user apparatus according to an embodiment is provided. The user apparatus communicates with a base station in a wireless communication system. The user apparatus includes an obtaining unit configured to obtain resource allocation information in which downlink signal reception quality is associated with radio resources used for uplink signal transmission; a measurement unit configured to measure the downlink signal reception quality; and a transmission unit configured to determine a radio resource of the radio resources used for uplink signal transmission by comparing the resource allocation information with the measured downlink signal reception quality, and transmit an uplink signal by using the determined radio resource.

Abstract: Provided are a communication control method, a communication control device, and a communication system that can appropriately change a device on a network that executes request processing from a terminal. In a node changing device 10, a sequence monitoring unit 12 detects handover of a UE 90. When the handover is detected, a placement calculation unit 14 acquires node information in the vicinity of a destination and activates nodes in the vicinity based on the node information. In this manner, upon detecting movement of a communication terminal, the node changing device 10 activates nodes in the vicinity of the destination of the communication terminal, and it is thereby possible to prevent an increase in communication delay even when the communication terminal is moved.

Abstract: Provided are a mobile station and a mobile communication method in which, when a secondary cell (SCell) is established in an unlicensed band, received power in the unlicensed band can be efficiently measured and reported to a radio access network. A UE (100) includes an RSSI measurement unit (133) that repeatedly measures RSSI in the frequency band of the secondary cell, a report determination unit (140) that determines, based on an RSSI measurement result, whether to report the measurement result to the radio access network, and a measurement report unit (150) that reports the measurement result to the radio access network. The report determination unit (140) determines that the measurement result is to be reported to the radio access network when the measurement result exceeds a predetermined threshold.

Abstract: A video predictive coding system includes a video predictive encoding device having: an input circuit to receive pictures constituting a video sequence; an encoding circuit which conducts predictive coding of a target picture using, as reference pictures, pictures encoded and reconstructed in the past, to generate compressed picture data; a reconstruction circuit to decode the compressed picture data to reconstruct a reproduced picture; picture storage to store the reproduced picture as a reference picture for encoding of a subsequent picture; and a buffer management circuit which controls the picture storage, (prior to predictive encoding of the target picture), on the basis of buffer description information BD[k] related to reference pictures used in predictive encoding of the target picture, encodes the buffer description information BD[k] with reference to buffer description information BD[m] for a picture different from the target picture, and adds encoded data thereof to the compressed picture data.

Abstract: A base station allocates downlink transmission powers to user equipments according to the reception qualities of the user equipments. The base station transmits a mixed data signal in which multiple data signals that are addressed to multiple user equipments and are not orthogonal to each other are mixed, and transmits multiple control signals to the multiple user equipments such that each user equipment can decode the data signal addressed to that user equipment using the control signal corresponding to that user equipment. Each control signal is scrambled using the identifier of the user equipment corresponding to that control signal. With a period longer than the transmission period for the control signal, the base station notifies the multiple user equipments of identifier information indicating multiple identifiers, and thus the user equipment can descramble a control signal for another user equipment to which an interference data signal with a higher transmission power is addressed.

Abstract: A user terminal is disclosed including a receiver that receives a downlink signal that is transmitted in repetitions in narrow bands to which frequency hopping is applied, and a processor that specifies a pattern of the applied frequency hopping based on a starting index that indicates a first narrow band in the narrow bands and a frequency offset that is a shift in a frequency direction from the first narrow band. The processor causes the receiver to receive the downlink signal using the specified pattern. Each of the narrow bands is a part of a system band. The user terminal communicates using the narrow bands only. The downlink signal starts being allocated to the first narrow band.

Abstract: The present invention is designed so that it is possible to adequately control the transmission power of uplink control channels even when the number of component carriers (CCs) that can be configured per user terminal is expanded more than in existing systems. According to the present invention, a user terminal has a transmission section that transmits an uplink control channel, and a control section that controls the transmission power of the uplink control channel, and the control section controls the transmission power of the uplink control channel based on at least one of the number of resource blocks constituting the format of the uplink control channel and the payload in the format including the cyclic redundancy check (CRC) bits.

Abstract: From a base station, a user equipment receives a mixed data signal transmitted in a format in which multiple data signals are transmitted with different downlink transmission powers such that the multiple data signals are not orthogonal to each other, multiple control signals corresponding to multiple user equipments, and information indicating an identifier of another user equipment. The user equipment determines an aggregation level of the subject user equipment. The user equipment uses the identifier of the other user equipment to attempt descrambling of one control signal among multiple control signals corresponding to an aggregation level higher than or equal to the aggregation level of the user equipment, and if the descrambling is successful, the user equipment uses the control signal to demodulate the non-orthogonal data signal.

Abstract: In implementation of “RRC diversity” in a handover procedure between cells under different radio base stations (eNB), “HO command” is transmitted in a handover destination cell at an appropriate timing. A handover method of the invention includes: a step A of causing a radio base station (eNB #1) to transmit “HO command” to a mobile station (UE); a step B of causing a radio base station (eNB #10) to start transmission of the “HO command” to the mobile station (UE) based on a scheduling start instruction from the radio base station (eNB); and a step C of causing the radio base station (eNB #1) to repeat transmission of the “HO command” to the mobile station (UE) at a predetermined cycle for a period until the detection of a scheduling stop trigger.

Abstract: The present invention is directed to efficiently transmitting feedback control information in a physical uplink control channel in a communication system having a system band formed with a plurality of fundamental frequency blocks.

Abstract: The present disclosure relates to techniques for reducing flash light effect in 3D MIMO. One aspect of the present invention relates to user equipment, comprising: a transmission and reception unit configured to receive an interference beam candidate list including directional beams transmitted from a camped base station and interference beam candidates transmitted from an adjacent base station; a measurement unit configured to measure reception quality of reference signals transmitted in the respective directional beams in the received interference beam candidate list; and an interference information generation unit configured to generate interference information based on the measured reception quality, wherein the transmission and reception unit indicates the generated interference information to the camped base station or the adjacent base station.

Abstract: A video processing system 100 is provided with video encoding device 10 and video decoding device 20. The video encoding device 10 implements backward interframe prediction from a temporally subsequent frame and outputs information indicating that an option to eliminate use of a decoded image of the temporally subsequent frame was chosen. The video decoding device 20 eliminates use of the decoded image of the frame on the basis of this information, in conjunction with input of the information for eliminating use of the decoded image of the temporally subsequent frame.

Abstract: A user terminal includes: a reception section that detects instruction information of a reception of a downlink shared channel on a downlink control channel; a transmission section that transmits uplink control information on the reception of the downlink shared channel corresponding to the instruction information; and a control section that determines a PUCCH (Physical Uplink Control Channel) format for transmitting the uplink control information from a plurality of PUCCH formats including a large-capacity PUCCH format having a larger capacity than PUCCH format 3. The control section determines a PUCCH resource for transmission with the large-capacity PUCCH format based on the instruction information.

Abstract: A module includes a switching request receiving unit configured to receive, when the module is connected with one terminal, a switching request indicating a connection switching to another terminal, an address changing unit configured to change the connection destination address using the reception of the switching request by the switching request receiving unit as a trigger, a connection disconnecting unit configured to forcibly disconnect the connection with the one terminal when the connection destination address is changed by the address changing unit, and a connection process executing unit configured to receive a connection request from the another terminal by the connection destination address changed by the address changing unit after the connection with the one terminal is disconnected by the connection disconnecting unit and to connect with the another terminal.

Abstract: A SIP control apparatus is provided. The SIP control apparatus is connected to a management apparatus controlling call processing rules in an IP packet network, and controls an emergency call made by a user apparatus. The SIP control apparatus includes an obtaining unit configured to, in the case where an emergency call connection request received from the user apparatus is anonymous, obtain an international mobile subscriber identifier, IMSI, of the user apparatus from the management apparatus; and a selection unit configured to, in the case where the obtaining unit succeeds in obtaining the IMSI of the user apparatus from the management apparatus, select to continue processing the emergency call connection request, and, in the case where the obtaining unit fails to obtain the IMSI of the user apparatus from the management apparatus, select whether to continue or to reject processing the emergency call connection request.