Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Protection at a particular protocol layer
Patent
1997-07-21
2000-05-23
Hua, Ly V.
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Protection at a particular protocol layer
713201, 713200, H04N 100
Patent
active
060676248
ABSTRACT:
A plurality of client apparatuses, which issue a request to obtain a control privilege, are registered in a camera control queue provided to obtain the control privilege of controlling an image sensing apparatus. When it is detected that one of the plurality of client apparatuses registered in the queue has issued a control request to control the image sensing apparatus, it is determined whether or not the client apparatus who has issued the control request possesses the control privilege. If the client apparatus does not possess the control privilege, it is determined whether or not shifting of the control privilege should be executed based on a control-privilege possessing time of a client apparatus which currently has the privilege. When it is determined that shifting of the control privilege should be executed, contents of the queue is updated, whereby shifting the camera control privilege. Accordingly, the control privilege of the image sensing apparatus is appropriately managed in response to a plurality of requests to control the image sensing apparatus, and more particularly, the period of control-privilege possessing time is controlled appropriately in correspondence with a volume of traffic of control requests issued by clients.
REFERENCES:
patent: 4755938 (1988-07-01), Takahashi et al.
patent: 5442749 (1995-08-01), Northcutt et al.
patent: 5546164 (1996-08-01), Hayashi
patent: 5553242 (1996-09-01), Russell et al.
Canon Kabushiki Kaisha
Hua Ly V.
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