Patent application number | Description | Published |
20080212488 | NETWORK LOAD DETECTION SYSTEM, METHOD, APPARATUS, AND PROGRAM - A system including 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, a unit calculating a network load in accordance with occurrence frequencies in a specific section of the generated delay distributions. | 09-04-2008 |
20080298271 | COMMUNICATION-QUALITY MEASURING APPARATUS, COMMUNICATION-QUALITY MEASURING METHOD, AND COMPUTER PROGRAM - A communication quality measuring apparatus comprising a connecting section establishing a connection to the packet exchange network, a capturing section capturing packets transferred over the packet exchange network, an accumulating section accumulating the packets, a control section repeating the capturing of packets in sections of fundamental processing times, a setting section setting the capturing time and the interval time within each fundamental processing time, and a determining section determining whether or not the amount of load on hardware resources of the communication-quality measuring apparatus is greater than a predetermined value. | 12-04-2008 |
20090003222 | PACKET COMMUNICATION QUALITY MEASURING APPARATUS, PROGRAM, AND METHOD - A packet communication quality measuring apparatus for capturing packets flowing in a packet communication network while recording capture times to measure communication quality based on the captured packets includes a detection part for detecting that a buffer in which the captured packets are stored is full and a determination part for determining a possibility of a capture failure occurring when fullness of the buffer is detected. | 01-01-2009 |
20090028057 | NETWORK DELAY MEASUREMENT METHOD AND COMMUNICATION SYSTEM - A measurement method and communication system include a writing of a creation time upon a detection packet used for detecting a communication state of a network being created into the detection packet. The method includes obtaining a send time when the detection packet was sent and sending, to a receiving apparatus which receives the detection packet, as a notification, information regarding a time period from when the detection packet was created to when the detection packet was sent. The method includes measuring, in the receiving apparatus, a delay occurring in the network based on the detection packet and the information sent as the notification. | 01-29-2009 |
20090052332 | DEVICE, SYSTEM, METHOD AND PROGRAM FOR COLLECTING NETWORK FAULT INFORMATION - A network fault information collecting device arranged in a packet network includes a quality degradation detecting unit which monitors packets to be regularly transmitted and received in the packet network, and detects quality degradation of the packets. The device includes a node search unit which searches for nodes on a path between transmission and reception terminals for the packet, upon detection of the quality degradation of the packets in the quality degradation detecting unit. The device includes an information collecting unit which issues an information collecting packet for each terminal searched by the node search unit, and collects and records terminal information. | 02-26-2009 |
20100008249 | MEASURING METHOD, MEASURING APPARATUS AND COMPUTER PROGRAM - 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. | 01-14-2010 |
20100020708 | PACKET CAPTURE APPARATUS, PACKET CAPTURE METHOD, AND COMPUTER READABLE MEDIUM HAVING A PACKET CAPTURE PROGRAM - 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. | 01-28-2010 |
20100085886 | PACKET DELAY CHARACTERISTIC MEASURING APPARATUS AND METHOD - 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. | 04-08-2010 |
20100246583 | RELAY DEVICE, STATE INFORMING METHOD, AND COMPUTER PROGRAM - 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. | 09-30-2010 |
20100322095 | PACKET ANALYSIS APPARATUS AND METHOD THEREOF - 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. | 12-23-2010 |
20110047446 | NETWORK MANAGEMENT APPARATUS FOR SETTING COMMUNICATION METHOD OF NETWORK APPARATUS - 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. | 02-24-2011 |
20110216664 | PUSH SIGNAL DELIVERY STATUS JUDGING APPARATUS AND METHOD - 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. | 09-08-2011 |
20110242992 | Failure-section determining device and failure-section determining method - 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. | 10-06-2011 |
20110280149 | PACKET CAPTURE SYSTEM, PACKET CAPTURE METHOD, INFORMATION PROCESSING DEVICE, AND STORAGE MEDIUM - 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. | 11-17-2011 |
20110289353 | DEVICE AND METHOD FOR COLLECTING NETWORK FAILURE INFORMATION - 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. | 11-24-2011 |
20120182880 | MONITORING APPARATUS, MONITORING METHOD, AND COMPUTER-READABLE STORAGE MEDIUM - 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. | 07-19-2012 |
20130044618 | MONITORING APPARATUS, MONITORING METHOD, AND COMPUTER PRODUCT - 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. | 02-21-2013 |
20130329585 | NETWORK ANALYSIS METHOD, INFORMATION PROCESSING DEVICE, AND STORAGE MEDIUM - A network analysis method using an information processing device includes receiving packets from a wired network; extracting, from a set of the received packets, a delay packet that was received after at least a predetermined period of time had elapsed since an immediately preceding packet was received; and determining that a packet delay because of a control signal wirelessly sent from an access point coupled to the wired network has occurred, based on periodicity of a timing at which the delay packet was received. | 12-12-2013 |
20140177462 | NETWORK ANALYSIS METHOD, INFORMATION PROCESSING DEVICE, AND COMPUTER-READABLE RECORDING MEDIUM - A network analysis method performed by a computer, the network analysis method includes receiving packets from a wired network, extracting a plurality of continuous packets transmitted by a communication device, and a plurality of acknowledgement packets transmitted by a wireless communication device in response to the plurality of continuous packets, and determining whether a delay is due to a wireless communication between the wireless communication device and an access point, based on a time interval of the plurality of continuous packets, and a time interval of the plurality of acknowledgment packets. | 06-26-2014 |
20140198679 | ANALYZING DEVICE, ANALYZING METHOD, AND ANALYZING PROGRAM - An analyzing device includes a memory and a processor coupled to the memory. The processor is configured to receive an acknowledgement from a wireless communication device for each of a plurality of data which is transmitted through a wired network and transmitted to the wireless communication device by a wireless communication which is capable of retransmitting data, from the wired network, calculate a reception interval of the plurality of acknowledgements, and analyze a retransmission cycle in the wireless communication based on a difference of the calculated reception interval of the plurality of acknowledgements. | 07-17-2014 |
20150023189 | PACKET ANALYSIS DEVICE AND PACKET ANALYZING METHOD - A packet analysis device includes a processor that executes a process including receiving a packet to be transmitted to a terminal device through a relay device, calculating a delay time indicating time taken by the relay device from start to completion of the transmission of the packet according to the received packet, and analyzing communication quality between the relay device and the terminal device when a reception interval of the packet is longer than the delay time. | 01-22-2015 |
20150043351 | PACKET ANALYSIS METHOD, PACKET ANALYSIS DEVICE, AND STORAGE MEDIUM - A packet analysis method includes acquiring a first acknowledge packet and a second acknowledge packet transmitted from the first device; acquiring a plurality of packets transmitted from the second device during a period from reception of the first acknowledge packet to reception of the second acknowledge packet; identifying a number of packets corresponds to data transmitted from the second device, by calculating a difference between a first identification number corresponding to the first acknowledge packet and a second identification number corresponding to the second acknowledge packet; calculating a plurality of bandwidth values, a number of the plurality of bandwidth values is identical to the number of packets, based on acquisition timings of the plurality of packets and an interval between the acquisition timings of two adjacent packets; and determining a bandwidth value that is to be removed from the plurality of bandwidth values by comparing the plurality of bandwidth values. | 02-12-2015 |