Network system, information processor and electronic apparatus
First Claim
1. A network system comprising:
- a plurality of monitoring apparatus for determining a state of a monitored apparatus based on monitored apparatus information received from the monitored apparatus via a network, the plurality of monitoring apparatus including a first monitoring apparatus and a second monitoring apparatus, the first monitoring apparatus receiving the monitored apparatus information at a first time, the second monitoring apparatus receiving the monitored apparatus information at a second time, and the second time being different from the first time,wherein;
the first monitoring apparatus is designed to transmit state information, indicating the state of the monitored apparatus, to the second monitoring apparatus, when the first monitoring apparatus detects a change in the state of the monitored apparatus,the second monitoring apparatus is designed to determine the state of the monitored apparatus based on the monitored apparatus information and the state information,the first monitoring apparatus is designed to transmit specific state information, indicating that the monitored apparatus is disconnected from the network, when the first monitoring apparatus does not receive the monitored apparatus information to be received at the first time from the monitored apparatus, andthe second monitoring apparatus is designed to determine that the monitored apparatus is disconnected from the network when the second monitoring apparatus receives the specific state information and when the second monitoring apparatus does not receive the monitored apparatus information to be received at the second time from the monitored apparatus.
1 Assignment
0 Petitions
Accused Products
Abstract
In the present network system, a printer 10 periodically transmits an update request at different timings respectively to an apparatus management PC 30 and to a directory service 50 which are monitoring apparatuses for monitoring network apparatuses (such as the printer 10). Each of the monitoring apparatuses 30, 50 determines a state of the printer 10 based on the update request from the printer 10. Especially in the present system, if the apparatus management PC 30 determines that the update request from the printer 10 is not received, it notifies the directory service 50 by transmitting a delete request. As a result, early detection of disconnection of the printer 10 by the directory service 50 is possible without causing substantial increase in the network traffic.
28 Citations
10 Claims
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1. A network system comprising:
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a plurality of monitoring apparatus for determining a state of a monitored apparatus based on monitored apparatus information received from the monitored apparatus via a network, the plurality of monitoring apparatus including a first monitoring apparatus and a second monitoring apparatus, the first monitoring apparatus receiving the monitored apparatus information at a first time, the second monitoring apparatus receiving the monitored apparatus information at a second time, and the second time being different from the first time, wherein; the first monitoring apparatus is designed to transmit state information, indicating the state of the monitored apparatus, to the second monitoring apparatus, when the first monitoring apparatus detects a change in the state of the monitored apparatus, the second monitoring apparatus is designed to determine the state of the monitored apparatus based on the monitored apparatus information and the state information, the first monitoring apparatus is designed to transmit specific state information, indicating that the monitored apparatus is disconnected from the network, when the first monitoring apparatus does not receive the monitored apparatus information to be received at the first time from the monitored apparatus, and the second monitoring apparatus is designed to determine that the monitored apparatus is disconnected from the network when the second monitoring apparatus receives the specific state information and when the second monitoring apparatus does not receive the monitored apparatus information to be received at the second time from the monitored apparatus. - View Dependent Claims (2, 3, 4)
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5. An information processor used as a first monitoring apparatus in a network system comprising a plurality of monitoring apparatus for determining a state of a monitored apparatus based on monitored apparatus information received from the monitored apparatus via the network, the first monitoring apparatus receiving the monitored apparatus information at a first time, the information processor comprising:
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a receiving device for receiving information via the network; a detecting device for detecting a change in the state of the monitored apparatus based on the monitored apparatus information from the monitored apparatus received by the receiving device; and a transmitting device for transmitting state information indicating the detected state of the monitored apparatus to a second monitoring apparatus which receives the monitored apparatus information from the monitored apparatus at a second time, the second time being different from the first time at which the information processor receives the monitored apparatus information, when the detecting device detects a change in the state of the monitored apparatus, wherein the transmitting device is designed to transmit specific state information, indicating that the monitored apparatus is disconnected from the network, when the first monitoring apparatus does not receive the monitored apparatus information at the first time from the monitored apparatus, and wherein the second monitoring apparatus is designed to determine that the monitored apparatus is disconnected from the network when the second monitoring apparatus receives the specific state information and when the second monitoring apparatus does not receive the monitored apparatus information to be received at the second time from the monitored apparatus. - View Dependent Claims (6)
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7. An information processor used as a second monitoring apparatus in a network system comprising a plurality of monitoring apparatus for determining a state of a monitored apparatus based on monitored apparatus information received from the monitored apparatus via a network, the second monitoring apparatus receiving the monitored apparatus information at a second time, the information processor comprising:
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a receiving device for receiving information via the network; and a determining device for determining the state of the monitored apparatus based on the monitored apparatus information from the monitored apparatus received by the receiving device and on state information indicating the state of the monitored apparatus transmitted from a first monitoring apparatus which receives the monitored apparatus information from the monitored apparatus at a first time, the first time being different from the second time at which the information processor receives the monitored apparatus information, wherein the first monitoring apparatus is designed to transmit specific state information, indicating that the monitored apparatus is disconnected from the network, when the first monitoring apparatus does not receive the monitored apparatus information at the first time from the monitored apparatus, and wherein the second monitoring apparatus is designed to determine that the monitored apparatus is disconnected from the network when the second monitoring apparatus receives the specific state information and when the second monitoring apparatus does not receive the monitored apparatus information to be received at the second time from the monitored apparatus.
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8. An electronic apparatus used as a monitored apparatus in a network system comprising a plurality of monitoring apparatus for determining a state of the monitored apparatus based on monitored apparatus information received from the monitored apparatus via the network, a first monitoring apparatus, among the plurality of monitoring apparatus, transmitting state information indicating the state of the monitored apparatus to a second monitoring apparatus when the first monitoring apparatus detects a change in the state of the monitored apparatus, the second monitoring apparatus which receives the state information determining the state of the monitored apparatus based on the monitored apparatus information and the state information, the electronic device comprising:
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a monitored apparatus information transmitting device for transmitting the monitored apparatus information at a first time to the first monitoring apparatus which transmits the state information and to the second monitoring apparatus which receives the state information at a second time, the second time being different from the first time, wherein the first monitoring apparatus is designed to transmit specific state information, indicating that the monitored apparatus is disconnected from the network, when the first monitoring apparatus does not receive the monitored apparatus information at the first time from the monitored apparatus, and wherein the second monitoring apparatus is designed to determine that the monitored apparatus is disconnected from the network when the second monitoring apparatus receives the specific state information and when the second monitoring apparatus does not receive the monitored apparatus information to be received at the second time from the monitored apparatus. - View Dependent Claims (9, 10)
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Specification