Abstract: A display of “scroll up by 1 hour” is overlaid on sections of station name of a program schedule Fa1 when an up arrow key of a cross key provided to a remote commander is operated when a cursor K is on the upper border of a program frame, and when there is any preceding program (past program) not currently displayed in the program schedule Fa1. Then when an enter key provided to the remote commander is operated, the 1-hour-scrolled-up program schedule Fa1 is responsively displayed after reconfiguration. In such a manner, the display range of the program schedule can be changed with ease, and the present invention is applicable to television receivers for digital broadcasting.

Abstract: A program guide information providing device is arranged so that reference information corresponding to identification information transmitted from a communication terminal device is read from preference information storage, programs matching the preferences of the user are searched from the program guide information based on the read preference information, searched program guide information is generated from the searched programs, and the searched program guide information is transmitted to the communication terminal device, thereby allowing the user to be provided with program guide information matching the preferences of the user, regardless of the location of the user using the communication terminal device.

Abstract: A power-saving packet forwarding device realizing electric power that accords to the number of lines in which communication is performed and a traffic volume inputted from the lines. A header processing unit with which the packet forwarding device is equipped has a plurality of packet processing circuits for performing a packet processing. A line number decision circuit monitors the number of lines in which communication is performed and a traffic volume inputted from the line, and decides presence or absence of an operation of a packet processing circuit. Based on this decision result, a power supply and a clock of the packet processing circuit that does not need to operate are interrupted, and accordingly power saving of the packet forwarding device is realized.

Abstract: By storing usage history information of a recording medium for recording information, which is obtained by using the recording medium, in storing means 13, and retrieving information that matches a user's preference from a plurality of information based on the usage history information, a program that matches the user's preference can be easily retrieved without inputting key information for retrieving information, hence time and effort in retrieving information can be further reduced.

Abstract: A network switching device includes multiple ports, multiple switching processors, and a table manager. The switching processors respectively have an address table, a output port specification module, an update requirement determination module, and a table update module. The output port specification module refers to a destination address in received data and the address table and specifies a output port for sending the data among the multiple ports. The update requirement determination module determines requirement for update of the address table with regard to a source address in the data. The table manager has an update detail acquisition module and an update request module. Upon determination of the requirement for update of the address table, the update detail acquisition module obtains an update detail of the address table from one of the switching processors. The update request module sends an update request to the switching processors, based on the update detail.

Abstract: In the case of a “distributed” integrated network node (architecture), a specific judgment process cannot be executed in any routing and transferring unit. The routing and transferring unit has been required to share such judgment process related information with an enhanced processing unit or with other routing and transferring units. Thus the manufacturing cost has increased when using an enhanced processing unit and the processing speed has been lowered unavoidably when cooperation is required among routing and transferring units. Those have been conventional problems. Furthermore, if any flow is disposed during a transfer from a packet transferring unit provided in a routing and transferring unit to a processing unit, the packet is disposed regardless of the packet priority. This has also been another conventional problem.

Abstract: A method or apparatus for transferring packets, which enables fast lines to be housed for a high load service that requires many calculations in an edge node in a communication network, in which data flows are concentrated. Information obtained from an input packet is held in a table entry in the apparatus and whether to perform such a processing as encryption, etc. is decided according to the state of the source or destination of the input packet or the internal state of the apparatus, thereby performing such a processing as encryption only for necessary packets and reducing the number of calculations.

Abstract: A packet switch identifies a communication flow carried across an IP network, observes the communication flow, and acquires statistics data thereof, such as the number of packets that passed through the switch, the number of discarded packets, time at which the packets arrived at the switch, and time at which the packets were sent out from the switch. The packet switch continues to acquire the statistics data on the communication flow while the communication flow continues. If the packet switch performs a relay function, it sends the locally obtained statistics data to the adjoining packet switch placed downstream. If the packet switch is a node placed on either end edge of the network, it gathers the statistics data obtained by and delivered from other switches in the network and sends the gathered statistics data to the network management system.

Abstract: A communication statistic information collection apparatus comprises a unit for searching a flow table for a flow entry corresponding to a searching key, a unit for collecting statistics information for each of flows, a unit for generating a packet for notifying a collector apparatus of stored statistics information, a unit for updating the flow table in accordance with statistics control information shown by a statistics control entry found as a result of searching the flow table, and a unit for generating a sample packet to be transferred to the collect or apparatus at a specified sampling rate in accordance with the statistics control information shown by a specified entry found from the flow table.

Abstract: A display of “scroll up by 1 hour” is overlaid on sections of station name of a program schedule Fa1 when an up arrow key of a cross key provided to a remote commander is operated when a cursor K is on the upper border of a program frame, and when there is any preceding program (past program) not currently displayed in the program schedule Fa1. Then when an enter key provided to the remote commander is operated, the 1-hour-scrolled-up program schedule Fa1 is responsively displayed after reconfiguration. In such a manner, the display range of the program schedule can be changed with ease, and the present invention is applicable to television receivers for digital broadcasting.

Abstract: A packet switch identifies a communication flow carried across an IP network, observes the communication flow, and acquires statistics data thereof, such as the number of packets that passed through the switch, the number of discarded packets, time at which the packets arrived at the switch, and time at which the packets were sent out from the switch. The packet switch continues to acquire the statistics data on the communication flow while the communication flow continues. If the packet switch performs a relay function, it sends the locally obtained statistics data to the adjoining packet switch placed downstream. If the packet switch is a node placed on either end edge of the network, it gathers the statistics data obtained by and delivered from other switches in the network and sends the gathered statistics data to the network management system.

Abstract: A packet switch identifies a communication flow carried across an IP network, observes the communication flow, and acquires statistics data thereof, such as the number of packets that passed through the switch, the number of discarded packets, time at which the packets arrived at the switch, and time at which the packets were sent out from the switch. The packet switch continues to acquire the statistics data on the communication flow while the communication flow continues. If the packet switch performs a relay function, it sends the locally obtained statistics data to the adjoining packet switch placed downstream. If the packet switch is a node placed on either end edge of the network, it gathers the statistics data obtained by and delivered from other switches in the network and sends the gathered statistics data to the network management system.

Abstract: A method or apparatus for transferring packets, which enables fast lines to be housed for a high load service that requires many calculations in an edge node in a communication network, in which data flows are concentrated. Information obtained from an input packet is held in a table entry in the apparatus and whether to perform such a processing as encryption, etc. is decided according to the state of the source or destination of the input packet or the internal state of the apparatus, thereby performing such a processing as encryption only for necessary packets and reducing the number of calculations.

Abstract: A packet switch identifies a communication flow carried across an IP network, observes the communication flow, and acquires statistics data thereof, such as the number of packets that passed through the switch, the number of discarded packets, time at which the packets arrived at the switch, and time at which the packets were sent out from the switch. The packet switch continues to acquire the statistics data on the communication flow while the communication flow continues. If the packet switch performs a relay function, it sends the locally obtained statistics data to the adjoining packet switch placed downstream. If the packet switch is a node placed on either end edge of the network, it gathers the statistics data obtained by and delivered from other switches in the network and sends the gathered statistics data to the network management system.

Abstract: A sorting method used with a distributed database having a plurality of first processors for holding partial records of a database that is divided into a plurality of portions and a host processor for accessing to each of the first processors. The method comprises the steps of: assigning a plurality of sections into which the distribution range of key values of records of the database is partitioned to a plurality of second processors in the first processors, and information for representing storage positions of the records to the second processors to which the sections of the key values, to which the records belong, are assigned; and sorting the plurality of key values, which have been received, in the second processors to produce key tables in which the information for representing the storage positions of the records which has been received is registrated together with the sorted key values, as the sorting result.

Abstract: A parallel database processing system a global database processing unit, a plurality of local database processing units, and a network interconnecting the global database processing unit and a plurality of local database processing units, wherein one table containing a number of records is partitioned into local tables, each local table being provided in a corresponding one of the local database processing units, secondary key indexes representing correspondence between the values of secondary keys for all records in the table and access information to the records corresponding to the secondary keys, are partitioned on the basis of the values into local secondary key indexes, each set of the local secondary key indexes being provided in a corresponding one of the local database processing units, and an identifying unit is provided in the global database processing unit, the identifying unit responsive to a retrieval request with the secondary key identifying the local database processing unit having the local

Abstract: A hierarchical network hierarchically connects a plurality of networks whose nodes are mutually connected by connection paths as a p-array n-dimensional cube to configure a single network. A plurality of nodes are selected from lower layer p-array n-dimensional cubes, and the selected gate nodes are mutually connected as a p-array m-dimensional cube to configure a p-array m-dimensional network on the next layer. Similarly, gate nodes are selected from a plurality of next-layer p-array m-dimensional networks, and mutually connected as a p-array l-dimensional cube to configure a p-array l-dimensional network in a further upper layer, thereby configuring a single hierarchical network as a whole.

Abstract: A data processor for latching in a floating point register floating point data having exponent parts of fixed and variable lengths, which are transferred from a main storage or an arithmetic unit as they are, but are not converted to another data expression type. When the data of the two representation types are to be input for computations from the floating point register or storage to the arithmetic unit, there is provided circuitry for controlling the data to be computed after that data has been converted into data having an exponent part of fixed length representation, in the arithmetic case of data having an exponent part of the variable length representation, and data to be computed without any data conversion in the arithmetic case of data having an exponent part of the fixed length representation. By thus controlling the two computations discriminatively, it is possible to realize the processing time periods matching the respective data widths.