Abstract: A communication device controls a first communication flow performed by a first terminal and a second communication flow performed by a second terminal. Both of the first communication flow and the second communication flow pass through a sharing section, and the second communication flow has a higher priority than a priority of the first communication flow. The communication device acquires a communication delay in the sharing section; acquires a rated delay of the second communication flow, the rated delay is a communication delay allowed to the second communication flow; and limits input of data from the first communication flow and the second communication flow to the sharing section based on a comparison result between the communication delay of the sharing section and the rated delay.

Abstract: A communication device, which is capable of communicating through a first communication line and a second communication line different from one another, includes one or more processors configured to: communicate through the first communication line in a keeping state of data to be communicated; in a case where the second communication line is unavailable, limit a communication of the data through the first communication line corresponding to a movement of the communication device; and in response to the second communication line becoming available, communicate the data through the second communication line.

Abstract: A base station device includes: a beamforming setting information obtaining unit obtaining a plurality of beamforming setting information; a positioning reference signal generation unit generating a plurality of positioning reference signals using each of the plurality of beamforming setting information; a schedule information obtaining unit obtaining schedule information indicating a transmission schedule of the plurality of the positioning reference signals; and a transmission unit transmitting each of the plurality of positioning reference signals based on the schedule information.

Abstract: A packet loss is specified in a communication device for transmitting a communication packet to a destination device via a route and receiving a delivery confirmation packet of the communication packet from the destination device. Sequence information of the communication packet for a communication flow is acquired. A correspondence relationship between a transmission order of the communication packet and the sequence information of the communication packet for each route is stored as transmission order correspondence information. Delivery confirmation information indicating a delivery state of the communication packet is acquired. It is determined whether the packet loss has occurred based on the transmission order correspondence information and the delivery confirmation information.

Abstract: By a communication device, a round-trip time estimation method, or a non-transitory computer-readable storage medium storing a round-trip time estimation program, sequence information of a communication packet and a reception confirmation packet are acquired, a round-trip time is estimated based on an acquisition result and three timings: two transmission times and a reception time.

Abstract: By a communication device, a line delay time estimation method, a non-transitory computer-readable storage medium storing a line delay time estimation program, a communication packet is accumulated, a data amount of the communication packet is monitored, and a residence time, which is a duration and for which the communication packet remains in a transmission buffer, is estimated as an upstream buffer delay time from the communication device to a counterpart device.

Abstract: A transmission device transmits packets through communication paths with load distribution. The device includes a calculation unit that, based on data amounts of packets held in order of arrival and line speeds of the paths, calculates predicted delays, which are time periods required for arrival of the packets at a reception device when the packets are transmitted through the paths; a selection unit that, when selecting the paths that transmit the packets so that the packets are received by the reception device in the order of arrival, as a packet to be transmitted through a high-latency communication path having the largest predicted delay when packets having the same data amount are transmitted, selects a packet that is later in the order of arrival than a packet selected based on the predicted delay; and a transmission unit that transmits the packets through the respective selected paths.

Abstract: A communication device includes a first clock, a communication unit, a delay time acquiring unit, a selection unit, and a correction unit. The communication unit is configured to receive first packets from an outside communication device including a second clock and transmit second packets to the outside communication device. The delay time acquiring unit is configured to a first delay time and a second delay time. The selection unit is configured to select one of the first packet and the second packet as a target packet. The correction unit is configured to calculate a correction value based on a first minimum delay time or a second minimum delay time, and correct the delay time of the target packet using the correction value.

Abstract: By a relay device, a relay method, a communication device, or a communication method for relay of communication between a first network and a second network, information related to a change in a competition state of communication by a plurality of communication nodes connected to the first network is acquired, and state change notification based on competition-related information is transmitted to at least one of a plurality of communication nodes.

Abstract: In a bandwidth estimation device, a measurement unit measures a measurement time from reception by a receiver of a first packet of a packet train including a plurality of packets that are sequentially transmitted from a transmitter via a communication line to reception by the receiver of a last packet of the packet train, An estimation validity determination unit compares the measurement time with a threshold time predefined based on performance of the receiver or characteristics of the communication line to determine whether a valid estimate of an available bandwidth of the communication line can be made. In response to the estimation validity determination unit determining that a valid estimate of the available bandwidth can be made, an estimation unit estimates the available bandwidth of the communication line based on an amount of data in the packet train and the measurement time.

Abstract: In a communication apparatus, a buffer offset calculator calculates a buffer offset for a transmission-ready state k-th communication unit in accordance with a total number of at least one of data packets that is (i) transmittable by at least one m-th communication unit in the N communication units except for the k-th communication unit and (ii) completely received by the recipient device within a data transmission period of the communication network corresponding to the k-th communication unit (m is each of variables 1 to N except for k). A data packet allocator selects, in a queue of the data packets stored in the transmission buffer, one of the data packets, a beginning of the selected data packet being located offset by the buffer offset relative to a beginning of the queue of the data packets. The data packet allocator allocates the selected data packet to the k-th communication unit.

Abstract: A redundant communication apparatus includes a determining unit and a transmitting unit. The determining unit determines an upper limit of a redundancy level when transmission waiting data in a transmission apparatus is made redundant and transmitted, based on a data quantity of the transmission waiting data and a communication speed of a communication line between a reception apparatus that is a transmission destination of the transmission waiting data and the transmission apparatus. The transmitting unit causes the transmission waiting data to be made redundant at a redundancy level that is equal to or less than the upper limit determined by the determining unit and transmits the data to the reception apparatus via the communication line.

Abstract: A target communication line defined as a congestion determination target and a client that transmits an ACK signal to a communication partner in a case where a signal is received from the communication partner are relayed to each other. It is determined whether a congestion occurs on a target communication line. A communication of the ACK signal is limited by a capture process that captures the signal communicated by the client in a case where determining that the congestion occurs on the target communication line.

Abstract: A terminal according to an aspect of the present disclosure includes: a memory storing a program; and one or more processors configured to execute the program to: receive, from a base station, a radio resource control message including information for configuring a periodicity of a physical uplink shared channel resource for a configured grant transmission; and transmit on a physical uplink shared channel resource, to the base station, information indicating that the terminal is not to use the physical uplink shared channel resource in the period of the configured grant transmission.

Abstract: A terminal apparatus mounted on a movable body is provided to communicate with an external communication apparatus outside the movable body. The terminal apparatus includes an antenna, and a communicator device. The antenna includes a plurality of antenna elements to be arranged along a traveling direction of the movable body. The communicator device is configured to communicate with the external communication apparatus using a communicating antenna element that is at least one of the plurality of antenna elements. The communicating antenna element is selected from the plurality of antenna elements so as to belong to a specified region. The specified region is defined by propagation environment information of an electric wave propagation path of a signal transmitted to and received from the external communication apparatus.

Abstract: A radio wave map provision device includes a radio wave map storage that stores a radio wave map. The radio wave map includes reference position information indicating a reference position, a communication speed with each external communication device at the reference position, and a connection probability indicating a probability of performing wireless communication with each external communication device at the reference position. The radio wave map provision device: receives the radio wave map request including request position information indicating a request position; obtains a lowest guaranteed speed and an estimated speed, at the reference position, based on the communication speed and the connection probability; and transmits a radio wave map reply including the connection probability, the lowest guaranteed speed, and the estimated speed, at the reference position corresponding to the request position information.

Abstract: A base station device communicates with a communication terminal device via a relay station device, which is located in a shielded space and performs a downstream communication with the communication terminal device located in the shielded space concurrently with an upstream communication with the base station device. The base station device includes: resource allocation unit allocating resources to be used in a communication between the relay station device and the base station device; a reuse requirement storage storing a reuse requirement, which is set based on a radio wave shielding ability of the shielded space; a reuse resource specifying unit specifying one or more reuse resources that satisfy the reuse requirement from the resources allocated by the resource allocation unit; and a transmission instruction unit instructing transmission of the reuse resources to the relay station device.

Abstract: A radio wave map generator device includes a receiving unit, a communication speed calculation unit, a connection probability calculation unit, and a storage unit. The receiving unit is configured to receive pieces of probe information each of which contains location information, propagation environment information, and external communication device identification information. The communication speed calculation unit is configured to calculate a first communication speed, and a second communication speed. The connection probability calculation unit is configured to calculate a first connection probability, and a second connection probability. The storage unit is configured to store the location information, external communication device identification information, the first communication speed, the second communication speed, the first connection probability, and the second connection probability.

Abstract: A data transmission device includes a wireless communication unit that wirelessly communicates with an external communication device, a travel route information acquirer that acquires a future travel route of a moving object, a travel route, a propagation environment information acquirer that acquires propagation environment information of a radio wave propagation path used in wireless communication, a speed information acquisition unit that acquires the moving speed of a moving object, and a converter that converts a relationship between the travel route and propagation environment information into a plurality of data slots each defined by the communication speed per unit time; a transmission instructor that instructs the wireless communication unit to transmit the data allocated to the data slot.

Abstract: A relay device includes: a storage unit storing a correspondence table that correlates header information with a relay resource, the relay resource implementing a communication request class defined based on the header information; a data acquisition unit acquiring the data transmitted from the transmission source device as acquired data; a relay resource determination unit determining a relay resource for the acquired data based on header information included in the acquired data and the correspondence table; and a data transmission unit transmitting the acquired data to the destination device using the relay resource determined by the relay resource determination unit.