Abstract: A base station device is configured to set, for each communication terminal device, a radio format for signals transmitted to and received from the communication terminal device. The radio format is set for each communication terminal device in accordance with, for example, a type of use including a moving speed of the communication terminal device. The base station device may be configured to change the radio format for the communication terminal device based on the information about a change in the environment of a radio communication between the communication terminal device and the base station device and a change including the communication terminal device's location. The signals transmitted and received between the base station device and the communication terminal device include radio formats in which at least one of a length of a symbol of the signal and a length of a cyclic prefix in an OFDM scheme differs.

Abstract: A communication system includes a user apparatus; and a base station including a distributed unit (DU) configured to wirelessly communicate with the user apparatus and a central unit (CU) connected to the distributed unit. The base station including the CU and the DU supports packet duplication, and the DU notifies the user apparatus of starting the packet duplication.

Abstract: A high-speed communication system etc. are provided in New Radio (NR) and LTE. When a secondary base station device detects a data inactive state for all bearers, the secondary base station device notifies a master base station device of occurrence of the data inactive state regardless of absence of an inquiry from the master base station device. The data inactive state is a state in which downlink data for a communication terminal device is inactive. When the master base station device receives the notification about the occurrence of the data inactive state, the master base station device transmits a command to the communication terminal device to transition from an RRC_CONNECTED state to an RRC_INACTIVE state. Based on the command from the master base station device, the communication terminal device transitions to the RRC_INACTIVE state.

Abstract: The present invention has an object to provide a communication system capable of minimizing effects due to a delay among a plurality of base station devices as much as possible in scheduling for communication with a terminal device in cooperation among the plurality of base station devices. Cells1 to 3 can each perform scheduling without using information for scheduling notified from one or a plurality of cells among pieces of information for scheduling notified from other cells. For example, in a case where an interface between the cell1 and cell3 has a large delay amount, the cell1 performs scheduling without using information S13 notified to the cell1 by the cell3, and the cell3 performs scheduling without using information S11 notified to the cell3 by the cell1.

Abstract: Better communication is provided. A communication system includes a communication terminal, and a base station configured to perform radio communication with the communication terminal. The communication terminal or the base station determines whether the base station supports a desired slice that is a Radio Access Network slice that the communication terminal desires to use.

Abstract: Provided is a high-speed communication system with the high reliability and the low latency under New Radio (NR). A base station device includes a plurality of distributed units (DUs, 802) that transmit and receive radio signals, and a central unit (CU, 801) that controls the plurality of DUs (802). The CU (801) duplicates a downlink packet addressed to a communication terminal device (804), and forwards the duplicated downlink packet to each of at least two DUs (802) among the plurality of DUs (802). Each of the at least two of the DUs (802) transmits, to the communication terminal device (804) by the radio signal, the downlink packet obtained from the CU (801). Upon redundant receipt of the downlink packets, the communication terminal device (804) removes a redundant downlink packet in accordance with a predefined downlink packet removal criterion.

Abstract: A centerline for generating network data of an indoor space can be generated while limiting the amount of calculation. Points where first straight lines and second straight lines constituting centerlines meet are created using re-entrant vertices (Step 1). The points created in Step 1 are connected by lines (Step 2). Connection lines corresponding to the longest sides are repeatedly deleted from closed polygons defined by the connection lines obtained in Step 2 until no closed polygons are left (Step 3). Each vertex of the connection lines obtained in Step 3 is connected to a farthest center point on the perimeter of the shape of the passage if there is such a farthest center point to which the vertex can be connected without touching the perimeter and without crossing other connection lines (Step 4).

Abstract: In a communication system, an eNB and a UE transmit and receive a UE monitoring message for confirming the state of the UE in a predetermined UE monitoring period. For example, in UE monitoring periods, a UE monitoring procedure is performed, so that the UE transmits the UE monitoring message to the eNB. Upon receipt of the UE monitoring message, the eNB transmits delivery confirmation information to the UE. The UE monitoring period is set as, for example, a period shorter than a TAU period. This allows the UE monitoring process to confirm the state of the UE even if the TAU period is lengthened. The eNB may transmit the UE monitoring message to the UE.

Abstract: A communication system includes a communication terminal, and a plurality of networks configured to perform radio communication with the communication terminal. A priority of at least one of a paging timing and a paging type is assigned to a paging to be transmitted from each of the plurality of networks. The communication terminal selects a corresponding one of the pagings to be received, based on the priority.

Abstract: Satisfactory SL communication is provided. A communication system includes: a first communication terminal; a second communication terminal configured to perform inter-terminal communication with the first communication terminal; and a third communication terminal configured to perform inter-terminal communication with the first communication terminal. The third communication terminal reports resource information for the inter-terminal communication between the first communication terminal and the second communication terminal to the first communication terminal via an interface for the inter-terminal communication between the first communication terminal and the third communication terminal.

Abstract: The present invention has an object to provide a communication system capable of minimizing effects due to a delay among a plurality of base station devices as much as possible in scheduling for communication with a terminal device in cooperation among the plurality of base station devices. Cells1 to 3 can each perform scheduling without using information for scheduling notified from one or a plurality of cells among pieces of information for scheduling notified from other cells. For example, in a case where an interface between the cell1 and cell3 has a large delay amount, the cell1 performs scheduling without using information S13 notified to the cell1 by the cell3, and the cell3 performs scheduling without using information S11 notified to the cell3 by the cell1.

Abstract: Provided is a communication system, etc. with low latency and high reliability, under New Radio (NR). A communication system includes a communication terminal device, and a plurality of nodes configured to be connected to the communication terminal device for radio communication and to provide a split bearer for the communication terminal device. The communication terminal device is configured to perform uplink transmission to an uplink transmission node among the plurality of nodes. The uplink transmission node is determined by an uplink transmission node determination process in which a node that provides the uplink transmission from the communication terminal device with lower latency among the plurality of nodes is determined as the uplink transmission node.

Abstract: A programmable controller allocates times obtained by dividing executable time in one operation cycle to a plurality of paths, executes sequence programs of the paths within the respective allocated times, and measures extra time that is a remainder of each of the allocation times when execution of each of the sequence programs ends. Then, the programmable controller determines whether a predetermined sequence program is to be executed in the measured extra time, and instructs the sequence execution unit to execute the predetermined sequence program in the extra time in accordance with a result of the determination.

Abstract: Centerlines for generating network data of an indoor space can be simplified while the amount of calculation is limited. A centerline simplification unit 240 performs processing of deleting centerlines of passages that are movable regions in an indoor space and processing of correcting centerlines. A determination unit 242 determines whether or not the simplification has ended based on the number of centerlines or the number of vertices connecting the centerlines.

Abstract: In a communication system with redundant paths which can ensure the reliability and maintain time-sensitive communications (TSC), a first host and a second host communicate through a plurality of communication paths. In the event of a past or current communication failure in any of the plurality of communication paths, mobility of communication terminals in communication paths other than the any of the plurality of communication paths is restricted.

Abstract: A terminal device having a relay function of relaying a signal received from a first peripheral terminal among peripheral terminals, which are other terminal devices available for direct communication with the terminal device, to a second peripheral terminal among the peripheral terminals, the terminal device including: a detection unit that detects the peripheral terminals; a storage unit that holds peripheral terminal information that is information on each of the peripheral terminals detected by the detection unit; and an information notification unit that transmits a notification message for notifying the other terminal devices of information on the terminal device, the notification message including the peripheral terminal information held by the storage unit.

Abstract: User equipment includes an antenna, a controller, a transmitter, and a receiver. The transmitter sends a first radio frequency signal for communication with a primary cell to the antenna according to a first timing advance set by the controller, and sends a second radio frequency signal for communication with a secondary cell to the antenna according to a second timing advance set by the controller. The receiver sends received data to the controller including information regarding at least one of the first timing advance and the second timing advance. The first timing advance indicating a first uplink transmission timing alignment value and the second timing advance indicating a second uplink transmission timing alignment value.

Abstract: In the SL communication, the QoS required for each service is maintained, and the reliability of the service is enhanced. A communication system includes a base station, and a plurality of communication terminals configured to perform communication with the base station and perform Device-to-Device communication. A first communication terminal transmits, to a third communication terminal, a scheduling request for performing the Device-to-Device communication with a second communication terminal. The third communication terminal transmits, to the base station, the scheduling request received from the first communication terminal. In response to the scheduling request received from the third communication terminal, the base station generates scheduling information on the Device-to-Device communication between the first communication terminal and the second communication terminal, and transmits the scheduling information to the third communication terminal.

Abstract: A centerline correction apparatus according to one embodiment corrects a centerline of a path that is acquired from shape information about an indoor space or road shape information about an outdoor space and that is a travelable region in the indoor space or the outdoor space. This centerline correction apparatus includes a centerline correction unit that performs: a center point extraction process that extracts a center point of an individual side of the centerline; a centerline correction process that moves the centerline to be at a center with respect to a distance to a boundary of an original shape based on the extracted center point; and an unnecessary centerline deletion process that deletes an unnecessary one of the moved centerlines.

Abstract: Provided is a communication system, etc. with low latency and high reliability, under New Radio (NR). A communication system includes a communication terminal device, and a plurality of nodes configured to be connected to the communication terminal device for radio communication and to provide a split bearer for the communication terminal device. The communication terminal device is configured to perform uplink transmission to an uplink transmission node among the plurality of nodes. The uplink transmission node is determined by an uplink transmission node determination process in which a node that provides the uplink transmission from the communication terminal device with lower latency among the plurality of nodes is determined as the uplink transmission node.