NETWORK MONITORING DEVICE, BUS SYSTEM MONITORING DEVICE, METHOD AND PROGRAM

• US 20110060831A1
• Filed: 06/12/2009
• Published: 03/10/2011
• Est. Priority Date: 06/12/2008
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Yamaguchi, Takao, Yoshida, Atsushi, Ishii, Tomoki
• Granted Patent: US 8,352,594 B2
• Time in Patent Office: Days
• US Class Current: 709/224
• CPC Class Codes: H04L 43/02 Capturing of monitoring data
• CPC Class Codes: H04L 43/0817 by checking functioning
• CPC Class Codes: H04L 43/0864 Round trip delays
• CPC Class Codes: H04L 43/0888 Throughput
• CPC Class Codes: H04L 43/103 with adaptive polling, i.e. dynamically adapting the polling rate
• CPC Class Codes: H04L 43/12 Network monitoring probes
• CPC Class Codes: H04N 7/181 for receiving images from a plurality of remote sources
• CPC Class Codes: H04N 7/185 from a mobile camera, e.g. for remote control

Abstract

A network monitoring device which monitors a network in which data is transmitted through relays, includes a monitoring frequency recording unit (111) which records monitoring frequencies for monitoring transmission statuses of the relays, a selection probability generating unit (112) which generates selection probability information which is probability values for the relays, a monitoring object determining unit (113) which determines, according to the monitoring frequency and the selection probability information, a relay the transmission status of which is to be monitored, a transmission status obtaining unit (106) which obtains transmission status information indicating a transmission status on the relay determined, a transmission status recording unit (107) which records the transmission status information, an activation level calculating unit (109) which calculates, using the transmission status information, activation level indicating suitability of the monitoring on the transmission statuses of the relays, and a monitoring frequency updating unit (110) which updates, based on the activation level, the monitoring frequency, and the network monitoring device detects the change in throughput on a data transmission path highly responsively.

Claims

1. A network monitoring device which monitors a network in which data is transmitted through a plurality of relays, said network monitoring device comprising:

a monitoring frequency recording unit configured to record monitoring frequencies each of which represents a monitoring frequency for monitoring a transmission status of a corresponding one of the plurality of relays;

a selection probability generating unit configured to generate selection probability information which is probability values for the plurality of relays;

a monitoring object determining unit configured to determine, according to the monitoring frequency and the selection probability information, a relay the transmission status of which is to be monitored, from the plurality of relays;

a transmission status obtaining unit configured to obtain transmission status information indicating a transmission status on the relay determined by said monitoring object determining unit;

a transmission status recording unit configured to record the transmission status information;

an activation level calculating unit configured to calculate, based on a difference in activation level, which increases in accordance with a correlation between the transmission statuses and the monitoring frequencies of the plurality of relays, indicated by the transmission status information, the activation level indicating suitability of the monitoring on the transmission statuses of the plurality of relays; and

a monitoring frequency updating unit configured to update, based on a difference in monitoring frequency which increases in accordance with the activation level, the monitoring frequency recorded on said monitoring frequency recording unit.

3. The network monitoring device according to claim 1,

wherein said transmission status recording unit is configured to record a round trip time I_i of a relay i as the transmission status information,

said activation level calculating unit is configured to calculate a correlation value α

representing extent of tendency that the relay with a larger round trip delay time I_i has a higher monitoring frequency m₁,

said monitoring frequency updating unit is configured to update the monitoring frequency m_i such that the smaller the correlation value α

is, the smaller a difference between a maximum value and other values among monitoring frequencies m_i of the plurality of relays becomes,

said selection probability generating unit is configured to generate, for each relay, a probability value η

_i which is a random value within a range determined according to a convergence value of the difference, and

said monitoring object determining unit is configured to determine the relay, the transmission status of which is to be monitored, based on a stochastic behavior, according to a probability distribution represented by monitoring frequencies of the plurality of relays, each of which is given by adding the monitoring frequency m_i and the probability value η

_i.

13. The network monitoring device according to claim 1,

wherein said monitoring frequency updating unit is configured to update a monitoring frequency for a set of relays.

2. (canceled)

4. A bus system monitoring device to which a plurality of signal processors are connected and which transmits data processed by the plurality of signal processors, said bus system monitoring device comprising:

a monitoring frequency recording unit configured to record monitoring frequencies each of which represents a monitoring frequency for a data generation status of a corresponding one of the plurality of signal processors;

a selection probability generating unit configured to generate selection probability information which is probability values for the plurality of signal processors;

a monitoring object determining unit configured to determine, according to the monitoring frequency and the selection probability information, a signal processor the data generation status of which is to be monitored;

a generated data amount obtaining unit configured to obtain generated data amount information indicating a data generation status on the signal processor determined by said monitoring object determining unit;

a generated data amount recording unit configured to record the generated data amount information;

an activation level calculating unit configured to calculate, based on a difference in activation level, which increases in accordance with a correlation between data amount generated in each signal processor and the monitoring frequencies of the plurality of signal processors, indicated by the generated data amount information, the activation level indicating suitability of the monitoring on the data generation statuses of the plurality of signal processors; and

a monitoring frequency updating unit configured to update, based on a difference in monitoring frequency which increases in accordance with the activation level, a monitoring frequency recorded on said monitoring frequency recording unit.

6. The bus system monitoring device according to claim 4,

wherein said transmission status recording unit is configured to record generated data amount p_i of a signal processor i as the transmission status information,

said activation level calculating unit is configured to calculate a correlation value α

representing extent of tendency that the signal processor with larger generated data amount p_i has a higher monitoring frequency m_i,

said monitoring frequency updating unit is configured to update the monitoring frequency m_i such that the smaller the correlation value α

is, the smaller a difference between a maximum value and other values among monitoring frequencies m_i of the plurality of signal processors becomes,

said selection probability generating unit is configured to generate, for each signal processor, a probability value η

_i which is a random value within a range determined according to a convergence value of the difference, and

said monitoring object determining unit is configured to determine the signal processor, the transmission status of which is to be monitored, through a stochastic behavior, according to a probability distribution represented by monitoring frequencies of the plurality of signal processors, each of which is given by adding the monitoring frequency m_i and the probability value η

_i.

5. (canceled)

7. A network monitoring method performed by a network monitoring device which monitors a network in which data is transmitted through a plurality of relays, said network monitoring device including:

a monitoring frequency recording unit;

a selection probability generating unit;

a monitoring object determining unit;

a transmission status obtaining unit;

a transmission status recording unit;

an activation level calculating unit; and

a monitoring frequency updating unit,

wherein the monitoring frequency recording unit is configured to record monitoring frequencies each of which represents a monitoring frequency for monitoring a transmission status of a corresponding one of the plurality of relays;

said network monitoring method comprises;

generating selection probability information which is probability values for the plurality of relays;

determining, according to the monitoring frequency and the selection probability information, a relay the transmission status of which is to be monitored, from the plurality of relays;

obtaining transmission status information indicating a transmission status on the relay determined by the monitoring object determining unit;

recording, by the transmission status recording unit, the transmission status information;

calculating, by the activation level calculating unit, based on a difference in activation level, which increases in accordance with a correlation between the transmission statuses and the monitoring frequencies of the plurality of relays, indicated by the transmission status information, an activation level indicating suitability of the monitoring on the transmission statuses of the plurality of relays; and

updating, by the monitoring frequency updating unit, the monitoring frequency recorded on the monitoring frequency recording unit, based on a difference in monitoring frequency which increases in accordance with the activation level.

9. A non-transitory computer-readable recording medium in which a computer program is stored, the program causing a computer to execute

steps included in the network monitoring method according to claim 7.

8. A bus system monitoring method by a bus system monitoring device to which a plurality of signal processors are connected and which transmits data processed by the plurality of signal processors, the bus system monitoring device including:

a monitoring frequency recording unit;

a selection probability generating unit;

a monitoring object determining unit;

a generated data amount obtaining unit;

a generated data amount recording unit;

an activation level calculating unit; and

a monitoring frequency updating unit,

wherein the monitoring frequency recording unit is configured to record monitoring frequencies each of which represents a monitoring frequency for a data generation status of a corresponding one of the plurality of signal processors;

said bus system monitoring method comprises;

generating, a selection probability generating unit, selection probability information which is a probability value for the plurality of signal processors;

determining, by a monitoring object determining unit, according to the monitoring frequency and the selection probability information, a signal processor the data generation status of which is to be monitored;

obtaining, by a generated data amount obtaining unit, generated data amount information indicating a data generation status on the signal processor determined by said monitoring object determining unit;

recording, a generated data amount recording unit, the generated data amount information;

calculating, by an activation level calculating unit, based on a difference in activation level, which increases in accordance with a correlation between data amount generated in each signal processor and the monitoring frequencies of the plurality of signal processors, indicated by the generated data amount information, the activation level indicating suitability of the monitoring on the data generation statuses of the plurality of signal processors; and

updating, by a monitoring frequency updating unit, based on a difference in monitoring frequency which increases in accordance with the activation level, a monitoring frequency recorded on said monitoring frequency recording unit.

10. A non-transitory computer-readable recording medium in which a computer program is stored, the program causing a computer to execute

steps included in the network monitoring method according to claim 8.

11. A bus system monitoring device which transfers data on a bus while monitoring transmission status of a plurality of transmission paths on a semiconductor in which a plurality of cores are mutually connected through a plurality of relays, said bus system monitoring device comprising:

a monitoring frequency recording unit configured to record monitoring frequencies each of which represents a monitoring frequency for monitoring a corresponding one of the plurality of relays;

a selection probability generating unit configured to generate selection probability information which is probability values for the plurality of relays;

a monitoring object determining unit configured to determine, according to the monitoring frequency and the selection probability information, a relay which is to be monitored;

a transmission status obtaining unit configured to obtain transmission status information indicating a transmission status on the relay determined by said monitoring object determining unit;

a transmission status recording unit configured to record the transmission status information;

an activation level calculating unit configured to calculate, based on a difference in activation level, which increases in accordance with a correlation between the transmission statuses and the monitoring frequencies of the plurality of relays, indicated by the transmission status information, the activation level indicating suitability of the monitoring on the transmission statuses of the plurality of relays; and

a monitoring frequency updating unit configured to update, based on a difference in monitoring frequency which increases in accordance with the activation level, the monitoring frequency recorded on said monitoring frequency recording unit.

12. The bus system monitoring device according to claim 11,

wherein said selection probability generating unit is configured to provide said monitoring object determining unit with a value read from a list that consists of sequential numbers that is recorded in advance, as the selection probability information;

and

said monitoring object determining unit is configured to determine a relay associated with the value provided by said selection probability generating unit as the relay to be monitored.