Communication apparatus and method of calculating round trip time
AssigneeCanon Kabushiki Kaisha
InventorMasami Shimakura
Life of this patent
Estimating the term…
Abstract
A communication apparatus which transmits data to a transmission destination, and receives, from the transmission destination, an acknowledgement indicating that the data has been received stores, in a memory, first specific data for specifying a plurality of transmission data, and transmission time data indicating transmission times of the plurality of transmission data. Based on second specific data contained in the acknowledgement, the communication apparatus searches the memory for first specific data for specifying transmission data corresponding to the acknowledgement, and calculates a round trip time based on the transmission time of the transmission data specified by the found first specific data, and a reception time at which the acknowledgement is received.
Claims7
A communication apparatus which transmits data to a transmission destination, and receives, from the transmission destination, an acknowledgement indicating that the data has been received, comprising:
- a memory unit configured to store first specific data for specifying a plurality of transmission data, and transmission time data indicating transmission times of the plurality of transmission data;
- a search unit that searches, based on second specific data contained in the acknowledgement, said memory unit for the first specific data for specifying transmission data corresponding to the acknowledgement;
- and
- a unit that calculates a round trip time based on a transmission time of the transmission data specified by the first specific data found by said search unit, and a reception time at which the acknowledgement is received.
A method of calculating a round trip time in a communication apparatus which transmits data to a transmission destination, and receives, from the transmission destination, an acknowledgement indicating that the data has been received, the method comprising:
- storing, in a memory, first specific data for specifying a plurality of transmission data, and transmission time data indicating transmission times of the plurality of transmission data;
- searching, based on second specific data contained in the acknowledgement, the memory for the first specific data for specifying transmission data corresponding to the acknowledgement;
- and
- calculating a round trip time based on a transmission time of the transmission data specified by the found first specific data, and a reception time at which the acknowledgement is received.
A non-transitory storage medium storing a computer program for transmitting data to a transmission destination, receiving, from the transmission destination, an acknowledgement indicating that the data has been received, and calculating a round trip time, the program comprising:
- a code for storing, in a memory, first specific data for specifying a plurality of transmission data, and transmission time data indicating transmission times of the plurality of transmission data;
- a code for searching, based on second specific data contained in the acknowledgement, the memory for the first specific data for specifying transmission data corresponding to the acknowledgement;
- and
- a code for calculating a round trip time based on a transmission time of the transmission data specified by the found first specific data, and a reception time at which the acknowledgement is received.
Dependencies are inferred from the claim text.