Abstract: A wireless terminal (12) includes a wireless transceiver (121) and a controller (122). The wireless transceiver (121) is configured to adjust, according to magnitude of a path cost to reach a gateway node (11) in a wireless multi-hop network (10) formed by communication of the wireless transceiver (121), a waiting time before joining the wireless multi-hop network (10) after power supply restoration. As a result, for example, it is possible to contribute to stable reconfiguration of a wireless multi-hop network.

Abstract: A metering device (11) is configured to collect meter reading data and transmit the meter reading data to a remote system (13) through a wireless communication network (12). Further, the metering device (11) is configured to adjust a start timing of predetermined communication based on predetermined information that is received before starting the predetermined communication after restoration of power supply to the metering device (11). As a result, for example, it is possible to adjust a communication start timing of the metering device according to the situation of the occurrence of a power supply interruption or the situation at the time of a power supply restoration.

Abstract: A metering device (1) is configured to connect to a base station (21) in a public radio communication network (2) and perform wireless communication with the base station (21). Further, the metering device (1) is configured to transmit, at each transmission opportunity for periodically transmitting meter reading data to a remote system (3), first meter reading data that is related to a measurement period and has never been transmitted previously toward the remote system (3) and second meter reading data that is related to a past measurement period and has already been transmitted toward the remote system (3) in a past transmission opportunity. This makes it possible, for example, to contribute to a reduction in time required for transmission and reception of data packets by a smart meter when sending meter reading data.

Abstract: A packet scheduling apparatus corrects an overhead amount between a DSL rate and a packet rate, converts DSL rate information to the packet rate, and shapes the IP packets from the Internet such that the IP packets are delivered at a transmission rate equal to or lower than the packet rate. An IP/ATM converter converts the IP packets from the packet scheduling apparatus to ATM cells. A DSL multiplexer has a DSL current rate detector for supplying DSL rate information indicative of a currently set DSL rate, and transmits the ATM cells from the IP/ATM converter or the IP packets from the packet scheduling apparatus to user terminals through DSL processing using telephone lines.

Abstract: A station device is connected to a plurality of subscriber devices and comprises a reception unit that receives signals from the subscriber devices. A reception level measurement unit measures the levels of reception by the reception unit. A transmission instruction unit causes each of the subscriber devices to transmit a pattern for measurement continuing for a predetermined time in an interval when no data is transmitted by the subscriber devices. A recognition control unit controls a signal recognition method for a signal received from the subscriber device based on the reception level of the pattern for measurement transmitted from the subscriber device and measured by the reception level measurement unit.

Abstract: An exemplary object of the present invention lies in a point of providing a time stamp packet transmitting apparatus capable of transferring time information in a packet network without being effected by a periodic dispersion time of a delay. The time stamp packet transmitting apparatus of the present invention is for changing a sending time period of a time stamp packet for filing time information, and transmitting the time stamp packet at its changed sending time period to a time stamp packet receiving apparatus via a packet network. In the present invention, sending the time stamp packet at an arbitrary sending packet time period responding to a sending trigger, which is output from an arbitrary sending cycle generator, makes it possible to detect a periodic delay jitter frequency that occurs in appliances within the packet network, and to remove the corresponding frequency.

Abstract: A packet scheduling apparatus corrects an overhead amount between a DSL rate and a packet rate, converts DSL rate information to the packet rate, and shapes the IP packets from the Internet such that the IP packets are delivered at a transmission rate equal to or lower than the packet rate. An IP/ATM converter converts the IP packets from the packet scheduling apparatus to ATM cells. A DSL multiplexer has a DSL current rate detector for supplying DSL rate information indicative of a currently set DSL rate, and transmits the ATM cells from the IP/ATM converter or the IP packets from the packet scheduling apparatus to user terminals through DSL processing using telephone lines.

Abstract: A packet scheduling apparatus corrects an overhead amount between a DSL rate and a packet rate, converts DSL rate information to the packet rate, and shapes the IP packets from the Internet such that the IP packets are delivered at a transmission rate equal to or lower than the packet rate. An IP/ATM converter converts the IP packets from the packet scheduling apparatus to ATM cells. A DSL multiplexer has a DSL current rate detector for supplying DSL rate information indicative of a currently set DSL rate, and transmits the ATM cells from the IP/ATM converter or the IP packets from the packet scheduling apparatus to user terminals through DSL processing using telephone lines.

Abstract: A PON transmission system and a dynamic band assignment system to be employed in the same which permits high speed band variation, to effectively use up band in PDS period, and to adapt to variation of traffic type. The PON transmission system includes a plurality of subscriber unit including optical network unit processing portions for terminating an optical communication network and a station unit including optical line terminal processing portion terminating the optical communication network. The system also includes means for monitoring increasing and decreasing of idle cells, means for recognizing accumulation of cell in the optical network unit processing portion depending upon the result of monitoring, and means for individually handling band process in the optical communication network according to necessary or unnecessary of band restriction depending upon traffic type.

Abstract: A packet scheduling apparatus corrects an overhead amount between a DSL rate and a packet rate, converts DSL rate information to the packet rate, and shapes the IP packets from the Internet such that the IP packets are delivered at a transmission rate equal to or lower than the packet rate. An IP/ATM converter converts the IP packets from the packet scheduling apparatus to ATM cells. A DSL multiplexer has a DSL current rate detector for supplying DSL rate information indicative of a currently set DSL rate, and transmits the ATM cells from the IP/ATM converter or the IP packets from the packet scheduling apparatus to user terminals through DSL processing using telephone lines.

Abstract: A PON transmission system and a dynamic band assignment system to be employed in the same which permits high speed band variation, to effectively use up band in PDS period, and to adapt to variation of traffic type. The PON transmission system includes a plurality of subscriber unit including optical network unit processing portions for terminating an optical communication network and a station unit including optical line terminal processing portion terminating the optical communication network. The system also includes means for monitoring increasing and decreasing of idle cells, means for recognizing accumulation of cell in the optical network unit processing portion depending upon the result of monitoring, and means for individually handling band process in the optical communication network according to necessary or unnecessary of band restriction depending upon traffic type.