Abstract: An information processing apparatus makes a plurality of threads concurrently execute tasks stored in a task queue associated with the thread a prescribed number of times of execution. The information processing apparatus includes a processor that executes the plurality of threads that executes a procedure. The procedure includes generating a task from among a plurality of tasks into which a serial program processing corresponding to a processing request is divided, selecting the task queue associated with one of the plurality of threads, enqueuing the generated task to the selected task queue, dequeuing the enqueued task to the task queue associated with the thread, and executing the dequeued task.

Abstract: In an optical transmission device, firmware that operates within a CPU of a first LIU and firmware that operates within a CPU of a second LIU periodically measure a load status of a CPU via an OS, respectively. Switchover control of a master CPU is performed according to a load status of a CPU measured by the firmware of each LIU. For example, when a load status of the CPU of the second LIU is lower than that of the CPU of the first LIU, a master CPU that performs switchover control of a predetermined port is switched to a slave CPU in the first LIU, and a slave CPU related to the predetermined port is switched to a master CPU in the second LIU, thereby dynamically changing the setting.

Abstract: An information processing apparatus makes a plurality of threads concurrently execute tasks stored in a task queue associated with the thread a prescribed number of times of execution. The information processing apparatus includes a processor that executes the plurality of threads that executes a procedure. The procedure includes generating a task from among a plurality of tasks into which a serial program processing corresponding to a processing request is divided, selecting the task queue associated with one of the plurality of threads, enqueuing the generated task to the selected task queue, dequeuing the enqueued task to the task queue associated with the thread, and executing the dequeued task.

Abstract: A communication processing apparatus appends group information representing a group to received communication frames. Group information to be appended to the communication frames is changed on a predetermined cycle. The communication frames processed in each processing unit are counted separately for each of the group information appended, and the count value is collected in each processing unit. With a communication processing apparatus, such as a switch and a router, which has a plurality of processing units (device), performs processing by each of the processing units on the communication frames received from a receiving unit, and transmits the processed communication frames from a transmitting unit, it is possible to realize a communication processing apparatus and a totalizing system capable of accurately counting and collecting the communication frames while performing an operation when totalizing the number of communication frames processed in each of the processing units.

Abstract: In an optical transmission device, firmware that operates within a CPU of a first LIU and firmware that operates within a CPU of a second LIU periodically measure a load status of a CPU via an OS, respectively. Switchover control of a master CPU is performed according to a load status of a CPU measured by the firmware of each LIU. For example, when a load status of the CPU of the second LIU is lower than that of the CPU of the first LIU, a master CPU that performs switchover control of a predetermined port is switched to a slave CPU in the first LIU, and a slave CPU related to the predetermined port is switched to a master CPU in the second LIU, thereby dynamically changing the setting.

Abstract: A frame forwarding apparatus comprises a receiving unit receiving a frame including a source address, a destination address and a VWAN identifier; a converting unit converting a VWAN identifier in the frame into one of degenerate VWAN identifiers that the number of adoptable values thereof is smaller than the number of VWAN identifiers; a storage unit containing at least one entry containing the source address in the frame, a degenerate VWAN identifier that a VWAN identifier in the frame is converted, and path information representing a path via which the frame is received; a retrieving unit retrieving, from said storage unit, an entry corresponding to the destination address in the frame and the degenerate VWAN identifier in the frame; a restoring unit restoring the degenerate VWAN identifier in the frame into the original VWAN identifier; and a transmitting unit transmitting the frame based on the path information in the entry retrieved.

Abstract: An evaluation criterion that evaluates a comparison result of a bandwidth before a bandwidth limitation and a bandwidth after the bandwidth limitation is selected and set in advance in a layer 2 (L2) switch device according to the present invention. An input packet is subjected to the bandwidth limitation and then output. The bandwidth before the bandwidth limitation and the bandwidth after the bandwidth limitation are constantly compared. Next, based on the preset evaluation criterion, the comparison result of the bandwidths is constantly evaluated. The evaluation result is output in real time to an input/output terminal such that the evaluation result can be displayed. When the bandwidth that is limited via the bandwidth limitation exceeds a maximum value of an admissible packet-dropping bandwidth that is set in advance, the excess is notified to a user in real time and the user can take quick countermeasures.

Abstract: A frame forwarding apparatus comprises a receiving unit receiving a frame including a source address, a destination address and a VWAN identifier; a converting unit converting a VWAN identifier in the frame into one of degenerate VWAN identifiers that the number of adoptable values thereof is smaller than the number of VWAN identifiers; a storage unit containing at least one entry containing the source address in the frame, a degenerate VWAN identifier that a VWAN identifier in the frame is converted, and path information representing a path via which the frame is received; a retrieving unit retrieving, from said storage unit, an entry corresponding to the destination address in the frame and the degenerate VWAN identifier in the frame; a restoring unit restoring the degenerate VWAN identifier in the frame into the original VWAN identifier; and a transmitting unit transmitting the frame based on the path information in the entry retrieved.

Abstract: A communication processing apparatus appends group information representing a group to received communication frames. Group information to be appended to the communication frames is changed on a predetermined cycle. The communication frames processed in each processing unit are counted separately for each of the group information appended, and the count value is collected in each processing unit. With a communication processing apparatus, such as a switch and a router, which has a plurality of processing units (device), performs processing by each of the processing units on the communication frames received from a receiving unit, and transmits the processed communication frames from a transmitting unit, it is possible to realize a communication processing apparatus and a totalizing system capable of accurately counting and collecting the communication frames while performing an operation when totalizing the number of communication frames processed in each of the processing units.

Abstract: A communication processing apparatus appends group information representing a group to received communication frames. Group information to be appended to the communication frames is changed on a predetermined cycle. The communication frames processed in each processing unit are counted separately for each of the group information appended, and the count value is collected in each processing unit. With a communication processing apparatus, such as a switch and a router, which has a plurality of processing units (device), performs processing by each of the processing units on the communication frames received from a receiving unit, and transmits the processed communication frames from a transmitting unit, it is possible to realize a communication processing apparatus and a totalizing system capable of accurately counting and collecting the communication frames while performing an operation when totalizing the number of communication frames processed in each of the processing units.

Abstract: A path protection method is disclosed that is capable of path protection without extra cost and able to improve path switching efficiency. The method includes the steps of associating a virtual network identifier assigned to one or more users with a virtual network identifier for management, the virtual network identifier assigned to one or more users being regarded as one path to set a path for current use and a spare path; and when switching the currently-used path and the spare path, according to service class information included in the virtual network identifier for management, a path corresponding to a virtual network identifier for management having a higher service class than other paths is preferentially switched to.

Abstract: In a light transmission equipment which can generate a desired concatenation signal from a maximum concatenation signal standardized in a synchronous transmission mode, a master and a slave circuit for clock change are provided respectively inputting at least two data at a maximum transmission rate based on a concatenation standard of a synchronous transmission mode obtained by dividing a desired transmission rate not prescribed in the concatenation standard to perform a concatenation control to the slave circuit by control information from the master circuit side.