Surveillance system and network system
First Claim
1. A surveillance system that monitors transfer of data comprising:
- an input node capturing a state of an item to be monitored;
an outputting information representing said state of said item to be monitored;
a control node controlling said input node and said output node; and
a network transferring data between said input node, said output node, and said control node;
wherein said control node determines a transfer capacity for a first type of data to be transferred uniformly over time, a total of said transfer capacity being no greater than a prescribed amount smaller than a total transfer capacity of said network;
if said input node, said output node, of said control node performs transfer of said first type of data, said data is transferred at a transfer rate corresponding to said determined transfer capacity; and
if said input node, said output node, or said control node performs transfer of a second type of data for non-uniform transfer over time, said data is transferred at a transfer rate corresponding to an available capacity of said network.
1 Assignment
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Accused Products
Abstract
In order to allow efficient use of bandwidth in communication paths in a surveillance system, the surveillance system has an operation unit which assigns fixed bandwidths to each of the communications taking place between camera nodes, which transfer image data at a uniform rate, and monitor nodes. A fixed bandwidth is assigned to, all communications taking place between the operation unit and sensor nodes, which generate alarm information at a non-uniform rate. If there is an increase in network traffic, bandwidth allocations, for communication between the camera nodes and the monitor nodes are reassigned so that bandwidth for these communications is reduced. The camera nodes use the bandwidth assigned to the camera nodes to transfer image data. The sensor nodes transfer alarm information using any bandwidth.
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Citations
10 Claims
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1. A surveillance system that monitors transfer of data comprising:
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an input node capturing a state of an item to be monitored;
an outputting information representing said state of said item to be monitored;
a control node controlling said input node and said output node; and
a network transferring data between said input node, said output node, and said control node;
wherein said control node determines a transfer capacity for a first type of data to be transferred uniformly over time, a total of said transfer capacity being no greater than a prescribed amount smaller than a total transfer capacity of said network;
if said input node, said output node, of said control node performs transfer of said first type of data, said data is transferred at a transfer rate corresponding to said determined transfer capacity; and
if said input node, said output node, or said control node performs transfer of a second type of data for non-uniform transfer over time, said data is transferred at a transfer rate corresponding to an available capacity of said network. - View Dependent Claims (2, 3)
said prescribed transfer is transfer of said first type of data;
said control node reassigns transfer capacities so that a transfer capacity assigned to said prescribed transfer is increased; and
said input node or said output node performing said prescribed transfer transfers data at a transfer rate corresponding to said re-assigned transfer capacity.
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4. A surveillance system monitoring and controlling data transferred over a network between an input node, which captures a state of an object, being monitored, and an output node, which outputs information representing said state of said object being monitored, said surveillance system comprising means for controlling said input node or said output node performing transfer of a first type of data so that if traffic in said network is at least at a prescribed level, a transfer rate used to transfer said first type of data via said network is reduced;
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wherein said input node or said output node transferring said first type of data reduces said transfer rate in response to said control from said controlling means, thus maintaining or increasing a transfer rate of transfers of a second type of data different from said first type. - View Dependent Claims (5)
said controlling means controls said input node or said output node transferring said first type of data so that a transfer rate for said first type of data is reduced, after, which, if traffic in said network is reduced to no more than a prescribed level, said controlling means controls said input node or said output node transferring said first type of data so that said transfer rate for said first type of data is increased; and
said input node or said output node transferring said first type of data increases said transfer rate in response to control from said controlling means.
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6. A network system comprising a communication node performing communications belonging to one of a plurality of communication types and a control node connected to said network, said control node including:
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means for storing a conditions table containing conditions to be fulfilled by bandwidth used by communications in a network for each of said plurality of communication types;
means for detecting bandwidth used in a network by each communication for each of said plurality of communication types; and
means for controlling said communication node via said network to change bandwidth use to fulfill said conditions contained in said condition table if detected bandwidth use by said communication types do not fulfill said conditions. - View Dependent Claims (7, 8)
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9. A network system comprising:
- a communication node performing communications via a network, said communications belonging to either a first communication type or a second communication type; and
a control node connected to said network;
said control node including;means for storing a bandwidth information table containing bandwidth assigned to communications of said first communication type;
means for detecting bandwidth used in said network by said second communication type by measuring communication data flowing through said network; and
means for controlling, via said network, a communication node performing communications of said first communication type in order to reduce bandwidth being used by said first communication type if a detected bandwidth usage by said second communication type exceeds a difference between a network bandwidth that can be used for communication for said first communication type and said second communication type and a bandwidth assigned to said first communication type as described is said bandwidth information table.
- a communication node performing communications via a network, said communications belonging to either a first communication type or a second communication type; and
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10. A network system comprising:
- a communication node performing communications via a network that belong to either a first communication type or a second communication type, and a control node connected to said network, said control node including;
means for detecting generation of communications of said second communication type by measuring communication data flowing over said network; and
means for controlling, via said network, said communication node performing communications of said first communication type to stop a communication of said first communication type if said generation of a communication of said second communication type is detected.
- a communication node performing communications via a network that belong to either a first communication type or a second communication type, and a control node connected to said network, said control node including;
Specification