Abstract: A position detection device is a position detection device installed in an apparatus, and detecting a position of the apparatus, and includes an acceleration sensor configured to detect acceleration information of the apparatus, a static acceleration removing unit configured to remove static acceleration information indicating acceleration information in a static state of the apparatus, from the acceleration information detected by the acceleration sensor, and generate movement acceleration information indicating acceleration information in a moving state of the apparatus, an error deriving unit configured to derive an error component contained in the movement acceleration information, an acceleration correcting unit configured to correct the movement acceleration information by subtracting the error component from the movement acceleration information, and a position information acquiring unit configured to acquire position information of the apparatus based on the corrected movement acceleration information

Abstract: In a communication device for monitoring a network system where a frame is transferred, with a maintenance frame for maintenance and management, an input-output section inputs or outputs a frame. A failure detection section detects occurrence of a failure in the network system on the basis of the inputted frame. A setting section sets the communication device according to the detection of the failure so as to terminate or transfer a data frame inputted from the input-output section. A data frame control section controls whether to terminate or transfer the data frame, according to the setting of the data frame by the setting section. A maintenance frame control section controls whether to terminate or transfer the maintenance frame inputted from the input-output section, according to the setting of the data frame by the setting section.

Abstract: In a communication device for monitoring a network system where a frame is transferred, with a maintenance frame for maintenance and management, an input-output section inputs or outputs a frame. A failure detection section detects occurrence of a failure in the network system on the basis of the inputted frame. A setting section sets the communication device according to the detection of the failure so as to terminate or transfer a data frame inputted from the input-output section. A data frame control section controls whether to terminate or transfer the data frame, according to the setting of the data frame by the setting section. A maintenance frame control section controls whether to terminate or transfer the maintenance frame inputted from the input-output section, according to the setting of the data frame by the setting section.

Abstract: For a WDM device including a multiplexer receiving fixed wavelengths, wavelength-converting parts for converting input wavelengths from optical transmission devices into the fixed wavelengths, and interface parts provided between the multiplexer and the wavelength-converting parts and having a specific wavelength that matches the fixed wavelength of the multiplexing part, a method and a device is provided for automatically determining the specific wavelength of the interface part that is to be selected as a converted wavelength output from the wavelength-converting part.

Abstract: A frame transfer method transfers frames in a service provider network that couples to a user network in a broadband network in which a plurality of user networks are coupled via the service provider network. The method receives a user frame that is input from a user network by a first edge switch within the service provider network that is coupled to the user network, and adds header information to the user frame in the first edge switch and outputs the frame that is added with the header information from the first edge switch to a core switch within the service provider network.

Abstract: For a WDM device including a multiplexer receiving fixed wavelengths, wavelength-converting parts for converting input wavelengths from optical transmission devices into the fixed wavelengths, and interface parts provided between the multiplexer and the wavelength-converting parts and having a specific wavelength that matches the fixed wavelength of the multiplexing part, a method and a device is provided for automatically determining the specific wavelength of the interface part that is to be selected as a converted wavelength output from the wavelength-converting part.