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US 7,073,000 B2Granted
Communication system and communication control apparatus and method
AssigneeCanon Kabushiki Kaisha
InventorTakashi Isoda
Life of this patent
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Abstract
An initiator has logical devices (A, B, C). A target to obtain services from the initiator designates the ID of provided services and the directory ID indicating a directory where the information concerning a logical device is stored, and further the target issues a connection control request to the initiator. The initiator provides the designated logical device and services to the target via the established connection.
Claims11
A communication system having a plurality of electronic devices, comprising:
- an initiator device functioning as an initiator defined by IEEE 1394.3, wherein the initiator device comprises:
- a first unit directory having a version value defined by IEEE 1394.3 and a remaining value defined by IEEE 1394.3;
- and
- a second unit directory having a version value different from a value defined by IEEE 1394.3 and a remaining value defined by IEEE 1394.3;
- and
- a target device which functions as a target defined by IEEE 1394.3, wherein the target device comprises:
- a reader that reads at least one of the first unit directory and the second unit directory of the initiator device in order to recognize a service provided by the initiator device;
- and
- an analyzer that, when said reader reads any of the first unit directory and the second unit directory, analyzes the remaining value in accordance with an IEEE 1394.3 definition.
6 more elements
Dependencies are inferred from the claim text.