US 12,003,397 B2 · Delay measurement device, delay measurement method, and delay measurement program

Abstract

A delay measurement device measures a delay time of an end-to-end route path of a virtual private network related to a predetermined user. The delay measurement device includes a measurement route generation unit configured to generate a first route that transfers to a start point node of a route path, transfers back on the route path, and then returns to itself, and to generate a second route of a route that transfers to the start point node of the route path and returns to itself; a packet transmission/reception unit configured to transmit and receive packets circulating on the first route; a delay measurement unit configured to measure a time from transmission of the packet to reception of the packet to set the measured time as a delay time of the route; and a one-way delay calculation unit configured to calculate a one-way delay time of the route path.

Claims18

Dependent claims

A delay measurement device for measuring a delay time of an end-to-end route path of a virtual private network related to a predetermined user, the device comprising a storage medium storing instructions and a computer configured to execute the instructions to perform operations comprising:

generating a first route that transfers to a start point node of a route path, transfers back on the route path, and then returns to the delay measurement device;
transmitting and receiving a first packet circulating on the first route;
measuring a time from transmission of the first packet to reception of the first packet to set the measured time as a delay time of the first route;
generating a second route of a route that transfers to the start point node of the route path and returns to the delay measurement device;
transmitting and receiving a second packet circulating on the second route;
measuring a time from transmission of the second packet to reception of the second packet to set the measured time as a delay time of the second route;
and
calculating a one-way delay time of the route path by subtracting a delay time of the second route from the delay time of the first route and dividing the difference by 2.

5 more elements

A delay measurement method comprising:

generating a first route that transfers to a start point node of a route path from a delay measurement device, transfers back on the route path, and then returns to the delay measurement device;
transmitting and receiving a first packet circulating on the first route;
measuring a time from transmission of the first packet to reception of the first packet to set the measured time as a delay time of the first route;
generating a second route of a route that transfers to the start point node of the route path and returns to the delay measurement device;
transmitting and receiving a second packet circulating on the second route;
measuring a time from transmission of the second packet to reception of the second packet to set the measured time as a delay time of the second route;
and
calculating a one-way delay time of the route path by subtracting the delay time of the second route from the delay time of the first route and dividing the difference by 2.

5 more elements

A non-transitory computer-readable medium storing delay measurement program for causing a computer to execute operations comprising:

generating a first route that transfers to a start point node of a route path, transfers back on the route path, and then returns to itself;
transmitting and receiving a first packet circulating on the first route;
measuring a time from transmission of the first packet to reception of the first packet to set the measured time as a delay time of the first route;
generating a second route that transfers to the start point node of the route path and returns to itself;
transmitting and receiving a second packet circulating on the second route;
measuring a time from transmission of the second packet to reception of the second packet to set the measured time as a delay time of the second route;
and
calculating a one-way delay time of the route path by subtracting the delay time of the second route from the delay time of the first route and dividing the difference by 2.

5 more elements

Dependencies are inferred from the claim text.

Delay measurement device, delay measurement method, and delay measurement program

Life of this patent

Delay measurement device, delay measurement method, and delay measurement program

Life of this patent

Abstract

Claims18