Patent application number | Description | Published |
20100254407 | COMMUNICATION DEVICE AND BANDWIDTH ALLOCATION METHOD - A communication device, which provides a bandwidth allocation opportunity to ONUs each having different data transmission rates, not depending on any specific bandwidth-request notifying method, thereby realizing fair upstream transmission data delay between data transmission rates of respective ONUs, includes a bandwidth-update-cycle division processor that divides the bandwidth update cycle into slots of each of the data transmission rates, a bandwidth-allocation-amount calculating unit that allocates a bandwidth to the slave station devices in a slot of the data transmission rate, and a transmission-start-time calculating unit that sets a transmission start time and a transmission time of data of the slave station devices, based on an overhead length of a data frame transmitted by the slave station devices. | 10-07-2010 |
20100290784 | COMMUNICATION CONTROL METHOD, STATION SIDE DEVICE, SUBSCRIBER SIDE DEVICE, AND COMMUNICATION SYSTEM - A communication control method performing Discovery processing, which is a procedure at an OLT to detect an ONU newly connected, in a PON system, the method includes: a transmission-permission-signal transmitting step of transmitting, by the OLT, a transmission permission signal for discovery, which includes an individual number of an ONU that is permitted to respond and mask information for designating a match-detection target bit for the individual number; and a registration-request-signal transmitting step of comparing, by an ONU, which is not registered in the OLT, a match-detection target bit for the individual number designated in the mask information with an individual number of the ONU based on a received transmission permission signal, and when the target bit and the individual number match each other, transmitting a registration request signal to the OLT. | 11-18-2010 |
20130330074 | COMMUNICATION SYSTEM, OPTICAL NETWORK UNIT, OPTICAL LINE TERMINAL, CONTROL DEVICE, AND COMMUNICATION CONTROL METHOD - An ONU includes a power-interruption detecting unit configured to detect power interruption of the ONU, a transmitting and receiving unit capable of being set in a power saving state, and a PON-side control unit configured to notify an OLT of, as power saving return information, a power holding time during occurrence of the power interruption of the ONU and a startup time, which is time until the transmitting and receiving unit returns from the power saving state, and, when the power-interruption detecting unit detects the power interruption, transmit a power interruption notification to the OLT. The OLT includes the PON control unit configured to determine, based on the power saving return information, whether the ONU can transmit the power interruption notification when the power interruption occurs in the power saving state. | 12-12-2013 |