Method to precisely and securely determine propagation delay and distance between sending and receiving node in packet network and packet network node system for executing the method
First Claim
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1. A method of measuring a propagation delay between nodes in a packet network, the method comprising:
- transmitting a ping packet from a first node to a second node through at least one of a plurality of third nodes;
determining an intermediate node delay of the ping packet at one of the plurality of third nodes through which the ping is transmitted and recording the intermediate node delay in the ping packet; and
determining a propagation delay by using the intermediate node delay.
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Abstract
A system and method for determining a propagation delay between nodes in a packet network are provided. The system and method include sending a ping packet from a source node to a destination node, determining an intermediate node delay of the ping packet at an intermediate node and recording the intermediate node delay in the ping packet and determining the propagation delay at the destination node by using the intermediate node delay.
31 Citations
27 Claims
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1. A method of measuring a propagation delay between nodes in a packet network, the method comprising:
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transmitting a ping packet from a first node to a second node through at least one of a plurality of third nodes; determining an intermediate node delay of the ping packet at one of the plurality of third nodes through which the ping is transmitted and recording the intermediate node delay in the ping packet; and determining a propagation delay by using the intermediate node delay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A computer-readable recording medium comprising instructions for executing a method of determining a propagation delay between nodes in a packet network is recorded, the instructions comprising:
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a first set of instructions for transmitting a ping packet from a first node to a second node through at least one of a plurality of third nodes; a second set of instructions for determining an intermediate node delay of the ping packet at one of the plurality of third nodes through which the ping is transmitted and recording the intermediate node delay in the ping packet; and a third set of instructions for determining a propagation delay by using the intermediate node delay.
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14. A method of determining a propagation delay between nodes in a packet network, the method comprising:
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transmitting a ping packet from a first node to a second node and storing a departure time; recording the departure time in a follow-up packet and sending the follow-up packet to the second node; determining an intermediate node delay of the ping packet at a third node and recording the intermediate node delay in the follow-up packet; and determining a propagation delay at the second node, based on the ping packet and the follow-up packet. - View Dependent Claims (15, 16, 17)
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18. A method of determining a propagation delay between nodes in a packet network, the method comprising:
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transmitting a ping packet from a source node to a destination node; recording, in the ping packet at an intermediate node, a link propagation delay of a link in a path as the ping packet traverses the network; and determining the propagation delay at the destination node based on the link propagation delay. - View Dependent Claims (19, 20, 21)
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22. A propagation delay determining node system in a packet network, the system comprising:
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a first node unit for sending a ping packet for determining a propagation delay to a second node; a third node unit for determining an intermediate node delay of the ping packet and for recording the intermediate node delay in the ping packet when the ping packet whose destination is not the third node is received; and a second node unit for receiving the ping packet whose destination is the second node and for determining the propagation delay by using the intermediate node delay included in the ping packet. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification