Abstract:
Disclosed is a radio base station (eNB1) provided with a storage unit (130) for storing base station information for selecting the destination of a message, a network communication unit (140) for transmitting the message to another radio base station selected according to the base station information, and a control unit (120) for controlling the storage unit (130) to set as base station information the priority level of the radio base station to which the message was sent according to the state of response to the transmitted message.
Abstract:
An interface unit for processing a first signal and a second signal, the second signal set to different transmission rate from the first signal and/or a different signal type from the first signal, including a plurality of interface panels, each of the plurality of interface panels including: a storage device which stores a first logic circuit data corresponding to the first signal and a second logic circuit data corresponding to the second signal, a configuration function unit which controls to select the first logic circuit data or the second logic circuit data, and a programmable logic circuit which reconfigures the first logic circuit data or the second logic circuit data based on a selection by the configuration function unit.
Abstract:
A wireless communication apparatus, having a plurality of antennas 11-1 to 11-M and for diversity-combining signals received by the plurality of antennas 11-1 to 11-M, is provided with a combining information calculation unit 14 for calculating antenna combined amplitude and combining weights based on received power of the plurality of antennas 11-1 to 11-M, a combining unit 15 for weighting and combining the signals received by the plurality of antennas 11-1 to 11-M based on the combining weights calculated, and a decoding processing unit 16 for decoding a combined reception signal generated by the combining unit 15. It thereby improves fading durability of the decoding process by reducing influence of multipath fading caused by arrival waves with delays, even in a case of using only a small number of reception antennas, and maintains a stable reception condition consistently, as well as achieving downsizing of and reduction in cost of hardware.
Abstract:
A unit timing signal synchronized with a high-order transmission frame is used for measuring a difference between the number of data pieces of a client signal mapped to the high-frequency frame and the number of data pieces of the output client signal by integrating the difference therebetween for each unit timing signal. Then stuffing and de-stuffing operations are performed so that a integration result is zero.
Abstract:
There is suppressed deterioration of transmission quality resulting from FWM light generated in the optical fiber of an optical transmission apparatus that performs wavelength division multiplex transmission. To suppress deterioration of the transmission quality due to the FWM light the sender apparatus adjusts the intensity of wavelength-division-multiplexed light output to the optical fiber according to a level of FWM crosstalk observed by receiver apparatus.
Abstract:
a mode change switch 3 which changes an automatic shift mode and a manual mode, an up-shift switch 4, and a down-shift switch 5 are provided. The mode change switch 3 outputs an output of the normal-open contact point P2 as a manual mode signal to a controller 1 in operating the manual change switch 3, while an output of the normal-closed contact point P4 is outputted to an input side of the up-shift switch 4 at non-operation thereof. The up-shift switch 4 and the down-shift switch 5 are provided with the normal-open contact points P12, P22 which output an up-shift signal commanding an up-shift or a down-shift signal commanding a down-shift in operating the switch, and the normal-closed contact points P14, P24 which output a monitor signal at non-operation thereof.
Abstract:
An acoustic echo canceller for cancelling an acoustic echo component produced when a signal on a receiving communication line appears on a transmitting communication line via an acoustic echo path. In the acoustic echo canceller, a variable coefficient series is divided into blocks, among which selected is a block requiring a coefficient correction amount update operation conforming to the attenuation characteristic of an impulse response in a sound field. A coefficient fitted to the attenuation characteristic of the impulse response in the sound field is set for the selected block. Therefore, convergence speed degradation of the acoustic echo cancellation characteristic involved in divided update can be compensated, and even if an echo path characteristic fluctuates, an excellent follow-up characteristic is provided, so that stable and high-speed acoustic echo cancellation can always be executed.
Abstract:
A radio base station eNB10-1 sends a Resource Status Request message for requesting initiation of transmission of a second load information to a radio base station eNB10-2 when a load level thereof is equal to or higher than a first threshold, and omits transmission of the Resource Status Request message for requesting initiation of transmission of the second load information when the load level thereof is lower than the first threshold. The radio base station eNB10-2 sends a Resource Status Update message including the second load information upon receipt of the Resource Status Request message for requesting initiation of transmission of the second load information.
Abstract:
Upon receipt of an RLF Indication message indicating a failure in a handover where a radio base station eNB10-1 is the handover source from the other radio base station eNB, the radio base station eNB10-1 can recognize that its coverage is not adjusted appropriately by referring to the RLF Indication message. Moreover, the radio base station eNB10-1 can adjust coverage appropriately by expanding the radiation area of the antenna 101 whose radiation area is directed toward the other radio base station eNB being the handover target, among the antennas 101 included in the radio base station eNB10-1.
Abstract:
In a transmission apparatus of a Gigabit Ethernet signal, in order to improve line efficiency, time division multiplexing is used. Further, if it is possible to branch/insert plural multiplexed Gigabit Ethernet signals at arbitrary nodes, it is possible to construct a more flexible network. For this reason, importance of a time division multiplexing apparatus having a function of branching/inserting Gigabit Ethernet signals is growing. A Gigabit Ethernet signal is monitored at the previous and subsequent stages of a cross connect unit, IFGs are inserted to the signal and switching is waited. If a signal state at the cross connection unit is an IFG, transmission path switching is performed, thereby performing transmission path switching without instantaneous interruption.