Abstract: A packet forwarding device performs forwarding of a packet between first and second wireless communication networks to which different identifiers are attached, and includes: a relay network that is interposed between the first and second wireless communication networks; a first processing unit that is connected to the first wireless communication network and performs first routing control by using first routing information in which the first wireless communication network and the relay network are defined as outgoing interfaces; and a second processing unit that is connected to the second wireless communication network and performs second route control by using second routing information in which the second wireless communication network and the relay network are defined as outgoing interfaces.

Abstract: An input section for a wavelength-selective switch array includes a plurality of optical ports. The plurality of optical ports includes a first sub-plurality of optical ports having a plurality of first port optical axes, a second sub-plurality of optical ports having a plurality of second port optical axes, and a plurality of optical power elements. Each one of the plurality of optical power elements is disposed at an end of a respective one of each of the plurality of optical ports. The plurality of optical power elements further includes a first sub-plurality of optical power elements including a plurality of first optical power element optical axes displaced relative to the plurality of first port optical axes and a second sub-plurality of optical power elements including a plurality of second optical power element optical axes displaced relative to the plurality of second port optical axes.

Abstract: An input section for a wavelength-selective switch array includes a plurality of optical ports. The plurality of optical ports includes a first sub-plurality of optical ports having a plurality of first port optical axes, a second sub-plurality of optical ports having a plurality of second port optical axes, and a plurality of optical power elements. Each one of the plurality of optical power elements is disposed at an end of a respective one of each of the plurality of optical ports. The plurality of optical power elements further includes a first sub-plurality of optical power elements including a plurality of first optical power element optical axes displaced relative to the plurality of first port optical axes and a second sub-plurality of optical power elements including a plurality of second optical power element optical axes displaced relative to the plurality of second port optical axes.

Abstract: A communication device conforming with plural communication standards and having a storage storing a plurality of virtual stacks each having an application program and communication program that implements a protocol stack for communication by the application program. An executor executes the virtual stacks, and a switching controller switches the virtual stacks to be executed by performing a first processing in which at least one part of at least one of the virtual stacks is read from storage and stored into a memory of, and executed by, the executor. Then, in accordance with free capacity in the memory, at least one part of at least one of the virtual stacks executed in the first processing is deleted from memory. In a second processing at least one part of at least one of the virtual stacks is read from the storage and stored into the memory of, and executed by, the executor.

Abstract: A wavelength selective switch device includes an incidence part where wavelength multiplexed light made of light of a plurality of wavelengths enters, an exit part that includes a plurality of fiber that outputs light of a wavelength selected from a signal in which wavelength multiplexed light that entered from the incidence part enters, a polarization diversity part that separates incidence light that entered the incidence part according to polarization components of the incidence light to make first and second optical beams, a wavelength dispersion and synthesis element that spatially disperses incidence light according to a wavelength of the incidence light and multiplexes the spatially dispersed reflected light according to the wavelength, and a wavelength dispersion and synthesis element that spatially disperses incidence light according to a wavelength of the incidence light and multiplexes the spatially dispersed reflected light according to the wavelength.

Abstract: A communication device communicating in conformance with a prescribed communication standard includes a storage storing at least a first virtual program that includes a program implementing a first function of the communication device and a second virtual program that includes a program implementing a second function of the communication device, an executer configured to successively execute the first and second virtual programs, and a switching controller configured to read at least a part of either one of the first and second virtual programs from the storage, to store the part of either one of the first and second virtual programs into a memory of the executer, to execute the part of either one of the first and second virtual programs in the executer, after completion of the processing of the one virtual program, to delete at least a part of the one virtual program from the memory in accordance with free area in the memory, to read at least a part of the other virtual program of the first and second virtua

Abstract: A management apparatus, which manages a wireless network constituted by a plurality of wireless communication devices each capable of performing a wireless communication using TDMA system, is characterized by comprising an extended link management unit that manages an extended link obtained by setting, to a link for which a channel and time slots to be used for wireless communications using the TDMA system are specified and for which a communication direction is determined, attribute information that characterizes the wireless communications performed by the wireless communication devices by use of the link.

Abstract: An information display apparatus includes an image pick-up unit configured to picking up an image, a display unit configured to display the image picked up by the image pick-up unit, a first correcting unit configured to correct the image picked up by the image pick-up unit to generate a first image, a second correcting unit configured to correct the image picked up by the image pick-up unit to generate a second image, a recognizing unit configured to recognize the second image generated by the second correcting unit, and a display control unit configured to display an additional information according to a result of the recognition performed by the recognizing unit with superimposing the additional information on the first image generated by the first correcting unit on the display unit.

Abstract: A wavelength selective optical switch includes an incidence/emergence unit that includes an input port at which signal light made up of light of numerous wavelengths is incident and an output port at which light signals of selected wavelengths are emergent, a wavelength dispersion element that spatially disperses signal light according to a wavelength of the signal light, and synthesizes reflected light, a condenser element that condenses light dispersed by the wavelength dispersion element on a two-dimensional plane, a space phase modulator arranged so as to receive incident light deployed on an xy plane made up of an x-axis direction deployed according to wavelength and a y-axis direction orthogonal to the x-axis direction, and having numerous pixels arranged in a lattice on the xy plane, and a space phase modulator drive unit.

Abstract: A wireless communication apparatus for performing wireless communication between wireless devices via a wireless communication network, wherein the wireless communication apparatus comprises: a packet processor for generating a first packet including first control information and discrimination information for discriminating between the first control information for connecting to the wireless communication network a set wireless device, which is a wireless device for which the setting of instrument information required for accessing the wireless communication network has been performed, and second control information for connecting to the wireless communication network a setting-required wireless device, which is a wireless device for which there is a need to set instrument information, and a second packet including the discrimination information and the second control information; and a wireless communication unit for transmitting the first packet and the second packet generated by the packet processor to th

Abstract: A packet forwarding device performs forwarding of a packet between first and second wireless communication networks to which different identifiers are attached, and includes: a relay network that is interposed between the first and second wireless communication networks; a first processing unit that is connected to the first wireless communication network and performs first routing control by using first routing information in which the first wireless communication network and the relay network are defined as outgoing interfaces; and a second processing unit that is connected to the second wireless communication network and performs second route control by using second routing information in which the second wireless communication network and the relay network are defined as outgoing interfaces.

Abstract: A wavelength selective optical switch includes a light input/output unit having a plurality of input/output ports, a polarization plane-independent wavelength dispersion element that splits incident light input from the optical input/output unit into spatially different angles for each wavelength, and synthesizes emergent light from different directions and outputs the light to the optical input/output unit, a condenser element that condenses the light split by the wavelength splitting element, a polarization splitter that splits incident light incident via the condenser element according to a polarization component to result in first and second light beams, aligns a polarization direction by rotating a polarization direction of one of the beams, and synthesizes the incident light by rotating one polarization direction of the emergent light of the same wavelength among the first and second reflected light beams, and a space phase modulation element.

Abstract: A wavelength selective optical switch includes an incidence/emergence unit that includes an input port at which signal light made up of light of numerous wavelengths is incident and an output port at which light signals of selected wavelengths are emergent, a wavelength dispersion element that spatially disperses signal light according to a wavelength of the signal light, and synthesizes reflected light, a condenser element that condenses light dispersed by the wavelength dispersion element on a two-dimensional plane, a space phase modulator arranged so as to receive incident light deployed on an xy plane made up of an x-axis direction deployed according to wavelength and a y-axis direction orthogonal to the x-axis direction, and having numerous pixels arranged in a lattice on the xy plane, and a space phase modulator drive unit.

Abstract: In an optically variable filter array apparatus, WDM-signal light beams of m channels ranging in wavelength from ?1 to ?n from optical fibers 11-1 to 11-m enter wavelength dispersion element 17 through concave mirror 16. Wavelength dispersion element disperses incident light beams in different directions according to their wavelengths and direct them to a concave mirror 18. In concave mirror, light beams of different channels are turned into strip-like parallel light beams and developed over xy plane according to channel and wavelength. Wavelength selection element 19 has pixels arranged in lattice pattern, for bringing a pixel at a position corresponding to to-be-selected channel and wavelength into a reflective state. Light beams reflected from wavelength selection element pass through the same path to exit from optical fibers 15-1 to 15-m. By changing reflection characteristics of wavelength selection element on a pixel-by-pixel basis, desired wavelengths of given WDM light can be selected.

Abstract: In an optically variable filter array apparatus, WDM-signal light beams of m channels ranging in wavelength from ?1 to ?n from optical fibers 11-1 to 11-m enter wavelength dispersion element 17. Wavelength dispersion element 17 disperses incident light beams in different directions according to their wavelengths. In lens 18, light beams of different channels are turned into strip-like parallel light beams and developed over xy plane according to channel and wavelength. Wavelength selection element 19 has pixels arranged in lattice pattern, for bringing a pixel at a position corresponding to to-be-selected channel and wavelength into a reflective state. Light beams reflected from wavelength selection element 19 pass through the same path to exit from optical fibers 15-1 to 15-m. By changing reflection characteristics of wavelength selection element 19 on a pixel-by-pixel basis, characteristics of optical filter can be varied, so that desired wavelengths of given WDM light can be selected.

Abstract: A wavelength selective switch device includes an incidence part where wavelength multiplexed light made of light of a plurality of wavelengths enters, an exit part that includes a plurality of fiber that outputs light of a wavelength selected from a signal in which wavelength multiplexed light that entered from the incidence part enters, a polarization diversity part that separates incidence light that entered the incidence part according to polarization components of the incidence light to make first and second optical beams, a wavelength dispersion and synthesis element that spatially disperses incidence light according to a wavelength of the incidence light and multiplexes the spatially dispersed reflected light according to the wavelength, and a wavelength dispersion and synthesis element that spatially disperses incidence light according to a wavelength of the incidence light and multiplexes the spatially dispersed reflected light according to the wavelength.

Abstract: Light from an optical fiber is incident on a frequency dispersion element. The frequency dispersion element disperses the incident light into light beams in different directions according to their frequencies and directs the dispersed light beams to a lens. The lens develops the incident light beams over an xy plane according to their frequencies in a strip-like form. A frequency selective element has pixels arranged in a frequency dispersion direction and brings pixels located at positions corresponding to the frequency to be selected into a reflective state. A light beam selected by the frequency selective element is emitted from an optical fiber through the same path. By changing reflection characteristics of the frequency selective element according to each pixel, optical filter characteristics can be desirably changed so as to achieve change of passband width and frequency shift.

Abstract: In a wavelength selective optical switch device that disperses a WDM light beam according to their wavelengths. Dispersed light beams is applied to a wavelength selecting element. Incident light beams are separately reflected in different directions according to their wavelengths by use of the multi-level optical phased array. In the optical phased array, even when the number of multi levels is small, by setting the maximum phase shift amount of the phased array to be at least 1.5 ? and less than 2.0 ?, wavelength dependence is reduced, thereby reducing crosstalk. In this manner, the wavelength dependence, in turn, crosstalk can be reduced.

Abstract: In a wavelength selective optical switch device that disperses a WDM light beam according to their wavelengths. Dispersed light beams is applied to a wavelength selecting element. Incident light beams are separately reflected in different directions according to their wavelengths by use of the multi-level optical phased array. In the optical phased array, even when the number of multi levels is small, by setting the maximum phase shift amount of the phased array to be at least 1.5 ? and less than 2.0 ?, wavelength dependence is reduced, thereby reducing crosstalk. In this manner, the wavelength dependence, in turn, crosstalk can be reduced.

Abstract: Light from an optical fiber is incident on a frequency dispersion element. The frequency dispersion element disperses the incident light into light beams in different directions according to their frequencies and directs the dispersed light beams to a lens. The lens develops the incident light beams over an xy plane according to their frequencies in a strip-like form. A frequency selective element has pixels arranged in a frequency dispersion direction and brings pixels located at positions corresponding to the frequency to be selected into a reflective state. A light beam selected by the frequency selective element is emitted from an optical fiber through the same path. By changing reflection characteristics of the frequency selective element according to each pixel, optical filter characteristics can be desirably changed so as to achieve change of passband width and frequency shift.