Abstract: In accordance with a first aspect of the disclosure, a system is provided. The system includes: an optical line terminal (OLT) shelf including a plurality of optical line cards, each optical line card supporting at least one passive optical network (PON) interface for communicating with a corresponding set of optical network units (ONUs), the OLT shelf thereby corresponding to a plurality of sets the ONUs; a system card controller for controlling the plurality of optical line cards; and a DOCSIS proxy for emulating a cable modem (CM) SNMP agent for each ONU, the DOCSIS proxy being responsive to an SNP manager in a DOCSIS NMS to configure the ONUs accordingly.

Abstract: In one embodiment, a passive optical network is provided that includes: an optical line terminal (OLT) configured to transmit a plurality of downstream signals into a corresponding plurality of passive optical networks and to receive a corresponding plurality of upstream signals from the plurality of passive optical networks, wherein each downstream signal is separated in wavelength from the remaining wavelength signals, and wherein each upstream signal is separated in wavelength from the remaining upstream signal; a Mux/Demux configured to multiplex the downstream signals from the OLT into a optical fiber and to demultiplex upstream signals from the optical fibers to the OLT; and a splitter configured to split the downstream signals from the OLT to a plurality of optical network units such that each optical network unit receives the plurality of downstream signals.

Abstract: An optical transmission apparatus comprising a first detector for detecting the power of the supervisory signal light separated from received wavelength-division multiplexed signal lights; a second detector for detecting the power of the wavelength-division multiplexed signal lights after the separation of the supervisory signal light; a gain-controlled type optical amplifier for amplifying the wavelength-division multiplexed signal lights; an optical attenuator coupled to the amplifier; and a control unit for controlling the optical amplifier and the optical attenuator so as to keep the output level of the wavelength-division multiplexed signal lights to a predetermined target value, wherein the control unit restrains automatic output level control by the optical attenuator when the supervisory signal light power fluctuates within its permissible range and fluctuations in the signal light power have deviated from its permissible range.

Abstract: An optical transmission apparatus comprising a first detector for detecting the power of the supervisory signal light separated from received wavelength-division multiplexed signal lights; a second detector for detecting the power of the wavelength-division multiplexed signal lights after the separation of the supervisory signal light; a gain-controlled type optical amplifier for amplifying the wavelength-division multiplexed signal lights; an optical attenuator coupled to the amplifier; and a control unit for controlling the optical amplifier and the optical attenuator so as to keep the output level of the wavelength-division multiplexed signal lights to a predetermined target value, wherein the control unit restrains automatic output level control by the optical attenuator when the supervisory signal light power fluctuates within its permissible range and fluctuations in the signal light power have deviated from its permissible range.

Abstract: When an access terminal is handed off, requested-data-rate information based on a data rate control signal from each access terminal, average throughput of each access terminal before handoff, and a handoff request count are obtained from a base transceiver subsystem. A throughput after handoff of each access terminal is estimated from a ratio of the data rate information of each access terminal to the number of connected access terminals, and an estimated throughput ratio representing the degree of change from the average throughput of each access terminal before handoff to the estimated throughput is calculated. If the estimated throughput ratio is lower than or equal to a given value, the corresponding access terminal is not handed off. If the estimated throughput ratio is higher than the given value, the access terminal having the highest estimated throughput among access terminals requesting handoff is handed off.

Abstract: Handoff is conventionally carried out in accordance with radio reception statuses such as C/I, so that handoff to a congested station can be made, resulting in a decrease in throughput. When an access terminal is handed off, requested-data-rate information based on a data rate control signal from each access terminal, average throughput of each access terminal before handoff, and a handoff request count are obtained from a base transceiver subsystem. A throughput after handoff of each access terminal is estimated from a ratio of the data rate information of each access terminal to the number of connected access terminals, and an estimated throughput ratio representing the degree of change from the average throughput of each access terminal before handoff to the estimated throughput is calculated. If the estimated throughput ratio is lower than or equal to a given value, the corresponding access terminal is not handed off.

Abstract: Actual calculated throughput is presented to the user before the start of communications. A transmission and receiving section of a radio communication terminal transmits a first signal to a radio base station while the radio communication terminal is in an idling state to request a second signal (such as null data) used to calculate a transfer rate (such as throughput) expected in communications, and receives the second signal transmitted by the radio base station in response to the first signal. When the second signal having the amount of information specified in advance is received, a signal processing section calculates the transfer rate according to the time required from the start of receiving of the second signal to when the amount of information is reached, and the amount of information of the second signal received.

Abstract: A optical signal connection apparatus for connecting first and second optical signal transmission lines to first and second routers, respectively, is disclosed. The first and second routers are configured to handle both optical signals and electrical signals. The optical signal connection apparatus comprises a first node and a second node.