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US 6,665,719 B1Granted
Communication control for multi-layer communications
AssigneeCanon Kabushiki Kaisha
InventorTakashi Isoda
Life of this patent
Estimating the term…
Abstract
A communication control apparatus re-establishes connection of a line when a user disconnects the line by mistake during the transmission of data. When a lower layer is disconnected while data is being transmitted to another apparatus, an upper layer is controlled to maintain a session for a predetermined period of time, and when a line connection is re-established within the predetermined period of time, a connection is established for the transmission of data.
Claims27
A communication control apparatus comprising:
- a controller that, when a lower layer of a communication is disconnected while data is being transmitted to a different apparatus, permits an upper layer of the communication to maintain a session for a predetermined period of time, and when connection on the lower layer is re-established within the predetermined period of time, permits the upper layer to continue the transmission of data,
- wherein, said controller comprises:
- time determination means for determining whether the predetermined time has elapsed;
- re-connection determination means for determining whether a different apparatus in a session has been reconnected to a bus by the time said time determination means determines said predetermined time has elapsed;
- login determination means for, when said re-connection means determines that said different apparatus has been re-connected, determining whether a login to said different apparatus has been successful;
- reception determination means for, when said login determination means determines that said login has been successful, determining whether said different apparatus is capable of continuous reception;
- and
- transmission means for, when said reception determination means determines that continuous reception has been enabled, transmitting data to said different apparatus.
5 more elements
A machine-readable storage medium which stores a communication control program executed by an control apparatus, said communication control program comprising:
- code for controlling a communication that, when a lower layer of a communication is disconnected while data is being transmitted to another apparatus, permits an upper layer of the communication to maintain a session for a predetermined period of time, and when connection on the lower layer is re-establislled within the predetermined period of time, permits the upper layer to continue the transmission of data,
- wherein, said controlling step comprises:
- code for a time determination step of determining whether the predetermined time has elapsed;
- code for a re-connection determination step of determining whether a different apparatus in a session has been re-connected to a bus by the time it is determined at said time determination step that said predetermined time has elapsed;
- code for a login determination step of, when it is determined at said re-connection step that said different apparatus has been re-connected, determining whether a login to said different apparatus has been successful;
- code for a reception determination step of, when it is determined at said login determination step that said login has been successful, determining whether said different apparatus is capable of continuous reception;
- and
- code for a transmission step of, when it is determined at said reception determination step that continuous reception has been enabled, transmitting data to said different apparatus.
5 more elements
A communication control method comprising:
- controlling a communication such that, when a lower layer of the communication is disconnected while data is being transmitted to another apparatus, an upper layer of the communication is permitted to maintain a session for a predetermined period of time, and when connection on the lower layer is re-established within the predetermined period of time, the upper layer is permitted to continue the transmission of data,
- wherein, said controlling step comprises:
- a time determination step of determining whether the predetermined time has elapsed;
- a re-connection determination step of determining whether a different apparatus in a session has been reconnected to a bus by the time it is determined at said time determination step that said predetermined time has elapsed;
- a login determination step of, when it is determined at said re-connection step that said different apparatus has been re-connected, determining whether a login to said different apparatus has been successful;
- a reception determination step of, when it is determined at said login determination step that said login has been successful, determining whether said different apparatus is capable of continuous reception;
- and
- a transmission step of, when it is determined at said reception determination step that continuous reception has been enabled, transmitting data to said different apparatus.
5 more elements
Dependencies are inferred from the claim text.