Abstract: A network management apparatus includes: a receiving unit for receiving from a first network apparatus a notification of a communication method setting incompatibility with a second network apparatus connected to a first port of the first network apparatus; and a setting unit for setting on the second network apparatus a communication method of the second port of the second network apparatus connected to the first network apparatus such that the communication method of the second port matches a communication method of the first port of the first network apparatus.

Abstract: A monitoring apparatus includes a processor to execute a process that includes calculating the delay of each of the data among acquired series of data transmitted from a communication apparatus that performs transmission processing with regularity; extracting from the series of data, a set of data whose calculated delays are greater than or equal to a threshold; and identifying, from among the extracted set of data, a pattern of data appearing successively for a given number of times or more, at equivalent intervals; and an output device that outputs information indicating the data related to the identified pattern.

Abstract: A packet capture apparatus and method including receiving packets through a network, acquiring target packets including specific information from the received packets, extracting the target packets of each session, and storing the extracted target packets, estimating a capture cycle, a capture width, and a capture start time based on static information about the target packets to determine a start time and an end time of the reception of the packets based on the capture cycle, the capture width, and the capture start time, setting the start time and the end time in control by the packet capturing part, and using the start time and the end time being set to control intermittent packet capturing, where the packets are received during each capture width every capture cycle from the capture start time.

Abstract: There is provided a measuring apparatus for acquiring packets being transmitted and received within a packet network and measuring communication quality on the basis of the acquired packets, the apparatus including a part that extracts packets acquired within one of given sampling periods, each sampling period set intermittently, and a part that measures communication quality on the basis of the packets acquired within the sampling period.

Abstract: A packet delay characteristic measuring apparatus that can accurately only measure a delay in a network even if a delay may occur also in a device that receives packets. The apparatus includes: a sending section for periodically sending out test packets each including sending time information to the network; a branching section for handing over the test packets flowing from the network to each of a plurality of communication paths by electrically branching a communication path; a plurality of receiving sections each of which is connected to the branching section for receiving the identical test packets and calculating delay times based on the sending time information; and a measurement value determining section for comparing a plurality of delay times calculated by each of the plurality of receiving sections for the identical test packets and determining the smallest delay time value as a measurement value.

Abstract: A monitoring apparatus may receive data transmitted from a transmitting source apparatus at predetermined time intervals, via relay apparatuses configured to make a retransmission request depending on a reception error, and measure a reception time interval between consecutively received data. The monitoring apparatus may judge which one of the relay apparatuses is making the retransmission request, based on the measured reception time interval.

Abstract: In a presence system in which one user users a plurality of terminals, dynamically changing buddy lists are synchronized between the terminals. A presence notification message is sent to all the terminals of the user. The timing of sending includes, for example, when the presence information of a buddy is updated, when a new buddy is set, when display attribute information is updated, when a buddy is cancelled, and when a presence notification of unknown presentity is made. Thus, when one user uses a plurality of terminals in the presence system, dynamically changing buddy lists can be synchronized between the terminals. In addition, the display formats of the buddy lists do not differ from one terminal to another, and the same display format is attained.

Abstract: A reservation acceptance system is provided that accepts requests of reservations from customers so that the resources can be used efficiently.

Abstract: An apparatus to collect information about network failure includes: a normal mode packet assembly unit to assemble a transmission packet from transmission data output from an application in a normal mode being a procedure used when a transmission process is performed by specified communication protocol; a special mode packet assembly unit to assemble the transmission packet from the transmission data in a special mode being a procedure in which a procedure for collecting failure information is embedded into the procedure used when a transmission process is performed by the specified communication protocol; a switching control unit to activate the normal mode packet assembly unit or the special mode packet assembly unit selectively; and a response analysis unit to collect failure information according to a behavior of the response to the transmission packet transmitted from the special mode packet assembly unit.

Abstract: Measuring devices are connected to the same network. A sharing control processing unit controls sharing of capture of packets among the measuring devices. An aggregating unit collects the captured packets. Each measuring device notifies the sharing control processing unit of a state about its capture. The sharing control processing unit determines which measuring device is to start/stop the capture, according to a predetermined rule and the notified state. When determining that the capture is to be switched from a first measuring device to a second measuring device, the sharing control processing unit instructs the second measuring device to start the capture. After receiving a notification that the second measuring device has actually captured a packet(s), the sharing control processing unit instructs the first measuring device to stop the capture. The aggregating unit identifies a duplicate packet(s) double captured by the first and second measuring devices, and reconstructs the packets.

Abstract: A failure-section determining device includes a loss determining unit that calculates a receiving-time interval using a receiving time of data and a receiving time of immediately previous data, determines that a loss occurs when the receiving-time interval is a predetermined threshold or higher, and calculates the number of losses using the receiving-time interval and a data sending-time interval; and a determining unit that calculates the number of losses occurring in a first section between a sending device and a relay device, using a serial number of the received packet and a serial number of an immediately previous packet, and calculates the number of losses occurring in a second section between the relay device and a monitoring device, using the number of losses calculated by the loss determining unit and the number of losses occurring in the first section.

Abstract: In an information delivery apparatus and method, when a user who transmits information updates information to be transmitted, based on a profile of each user desiring delivery of the information, the order of delivering the updated information, that is, from which user the updated information should be sequentially delivered, is determined beforehand, and information delivery matching a status of the user at a delivered end.

Abstract: A method for judging delivery status of a push signal includes: receiving packets flowing in a specific session between a transmission source and transmission destination at an arbitrary point on a route of the specific session, and storing the received packets into a storage device, wherein the packets include voice packets and non-voice packets representing the push signal; judging based on sequence numbers included in the received packets stored in the storage device, whether or not packet loss has occurred in the specific session; and upon detecting that the packet loss has occurred, judging, according to status of the packet loss and predetermined characteristic of the non-voice packets, whether or not loss of the push signal has occurred.

Abstract: A network management apparatus includes: a receiving unit for receiving from a first network apparatus a notification of a communication method setting incompatibility with a second network apparatus connected to a first port of the first network apparatus; and a setting unit for setting on the second network apparatus a communication method of the second port of the second network apparatus connected to the first network apparatus such that the communication method of the second port matches a communication method of the first port of the first network apparatus.

Abstract: A method executed by a packet analysis apparatus for analyzing packets including voice packets and non-voice packets includes: capturing packets in a specific session; storing the captured packets in a storage; screening the stored packets to count up a receipt count of voice packets; determining whether packet loss has occurred in the specific session; and determining whether loss packets are voice packets in accordance with received packets adjacent to the loss packets to count up a loss count of voice packets when the packet loss has occurred.

Abstract: A relay device which forwards a packet received from a first device to a second device, the relay device includes a detection unit that detects that the relay device has been in a specified state, a generation unit that generates a packet that contains information for identifying the relay device and information indicating that the relay device is in the specified state when the detection unit detects that the relay device has been in the specified state, and a transmission unit that transmits the generated packet to a specific transmission destination.

Abstract: A system includes a unit transmitting test packets to a to-be-measured communication link at a first time interval, a unit transmitting burst loads each including a series of load packets to the communication link at a second time interval, a unit performing measurement of delay time periods in a manner that a plurality of test packets transmitted by varying elapsed time periods each from an instance of transmission of the burst load to an instance of transmission of the test packet are received from the communication link in a fluctuating time interval, a unit generating delay distributions indicative of packet occurrence frequencies in relation to a delay time period of the communication link in accordance with the measured delay time periods, and a unit calculating a network load in accordance with occurrence frequencies in a specific section of the generated delay distributions.

Abstract: The present invention includes a designating packet transferring step, a measurement packet transmitting step and a measurement packet collecting step. The designating packet transferring step is a step of transferring a designating packet in a target section for a communication performance measurement in the communication network, the designating packet designating a relaying apparatus which adds information to the measurement packet from among plural relaying apparatuses. The measurement packet transmitting step is a step of transmitting a measurement packet from one end of the target section. The measurement packet collecting step is a step of collecting the measurement packet transferred in the target section from among measurement packets which are transmitted in the measurement packet transmitting step.

Abstract: A packet delay characteristic measuring apparatus that can accurately only measure a delay in a network even if a delay may occur also in a device that receives packets. The apparatus includes: a sending section for periodically sending out test packets each including sending time information to the network; a branching section for handing over the test packets flowing from the network to each of a plurality of communication paths by electrically branching a communication path; a plurality of receiving sections each of which is connected to the branching section for receiving the identical test packets and calculating delay times based on the sending time information; and a measurement value determining section for comparing a plurality of delay times calculated by each of the plurality of receiving sections for the identical test packets and determining the smallest delay time value as a measurement value.

Abstract: A file sharing system connected to both a telephone network and a data communication network includes a telephone conversation state monitoring part for recording information for identifying speakers having a telephone conversation for each telephone conversation in a recording part as telephone conversation state data, a sharing space generating part for generating a file sharing space to a file sharing server for each telephone conversation, and recording information for identifying a file sharing space and information for identifying a speaker in a recording part in such a manner that they are associated with each other, and an access control part enabling access from a communication terminal by the speaker associated in the association data, among accesses from the communication terminals with respect to the file sharing Space.