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System and method for measuring round trip times in a network using a TCP packet
| Details |
Inventors: Shah, Dhaval N.; Honnur, Virupaksh; Bosteder, Dalen D.;
Assignee: Cisco Technology, Inc. (San Jose, CA)
Primary Examiner: Burgess; Glenton B.
Assistant Examiner: Salad; Abdullahi E.
Attorney, Agent or Firm: Van Pelt & Yi LLP
An embodiment of the present invention is a system and method for measuring round trip times in a network, such as the Internet, by utilizing a packet, such as a transmission control protocol (TCP) packet. The TCP packet may be a packet which is typically utilized during establishment of a reliable connection, such as a SYN or a SYN ACK. According to an embodiment of the present invention, a mirrored service is selected for a client by sending the TCP packet from an approximate location of each of the mirrored service to an approximate location of the client. A response is then received by each mirrored service from the approximate location of the client, and a round trip time for each mirrored service is measured from the time the TCP packet was sent to the time the response was received. The various round trip times of each mirrored service are compared with each other and a best round trip time, such as the shortest time, is selected. A mirrored service associated with the best round trip time is selected for use with the client. |
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DETAILED DESCRIPTION An embodiment of the present invention is a system and method for measuring round trip times in a network, such as the Internet, by utilizing a packet, such as a transmission control protocol (TCP) packet.
The TCP packet may be a packet which is typically utilized during establishment of a reliable connection, such as a SYN or a SYN ACK.
According to an embodiment of the present invention, a mirrored service is selected for a client by sending the TCP packet from an approximate location of each of the mirrored service to an approximate location of the client.
A response is then received by each mirrored service from the approximate location of the client, and a round trip time for each mirrored service is measured from the time the TCP packet was sent to the time the response was received.
The various round trip times of each mirrored service are compared with each other and a best round trip time, such as the shortest time, is selected.
A mirrored service associated with the best round trip time is selected for use with the client.
A method according to an embodiment of the present invention for measuring round trip time in a network is presented.
The method comprises sending a packet at a first time to an approximate location of a client, wherein the packet is of a type which may be used to establish a reliable connection; receiving a reply to the packet at a second time; and measuring a round trip time from the first time to the second time.
In another aspect of the invention, a system according to an embodiment of the present invention for measuring round trip time in a network is presented.
The system comprises a means for sending a packet at a first time to an approximate location of a client, wherein the packet is of a type which may be used to establish a reliable connection; a means for receiving a reply to the packet at a second time; and a means for measuring a round trip time from the first time to the second time.
In yet another aspect of the invention, a system according to an embodiment of the present invention for measuring a round trip time in a network is disclosed
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