Network band measurement device, system, method, and program

A network band measurement method including:

• receiving, from a network, a packet train that is a plurality of measurement packets the packet sizes of which successively increase or decrease by a fixed number for each packet and is transmitted at predetermined equal intervals, each measurement packet including at least a packet number, a packet size, and a transmission time;
• measuring arrival time of the respective measurement packets constituting the packet train, based on reception times of the received measurement packets and the transmission times included in the measurement packets;
• extracting as valid packets a series of measurement packets in an interval where change in the measured arrival time matches an arrival time change model having a predetermined pattern;
• and
• in the arrival time change model indicated by the valid packets, computing an available band of the network, using a measurement packet, among a series of measurement packets having the same arrival time, that has a maximum packet size.

A network band measurement method including:

• generating a plurality of measurement packets the packet sizes of which successively increase or decrease by a fixed number for each packet and transmitting as a packet train a series of the generated measurement packets at predetermined equal intervals, each measurement packet including at least a packet number, a packet size, and a transmission time at which the measurement packet is transmitted to a network;
• measuring arrival time of the respective measurement packets constituting the packet train, based on reception times of the measurement packets received from the network and the transmission times included in the measurement packets;
• extracting as valid packets a series of measurement packets in an interval where change in the measured arrival time matches an arrival time change model having a predetermined pattern;
• and
• in the arrival time change model indicated by the valid packets, computing an available band of the network, using a measurement packet, among a series of measurement packets having the same arrival time, that has a maximum packet size.

A non-transitory recording medium of a program, the program causing a computer to operate as:

• an arrival time measurer configured to receive, from a network, a packet train that is a plurality of measurement packets packet sizes of which successively increase or decrease by a fixed number for each packet and is transmitted at predetermined equal intervals, each measurement packet including at least a packet number, a packet size, and a transmission time, and measuring arrival time of respective measurement packets constituting the packet train, based on reception times of received measurement packets and transmission times included in the measurement packets;
• a valid packet extractor configured to extract as valid packets a series of measurement packets in an interval where change in the measured arrival time matches an arrival time change model having a predetermined pattern;
• and
• an available band measurer configured to, in the arrival time change model indicated by the valid packets, compute an available band of the network, using a measurement packet, among a series of measurement packets having the same arrival time, that has a maximum packet size.