Method for reassigning the role of a wireless node in a wireless network
First Claim
1. A method for maintaining network lifetime of a wireless sensor network of an industrial control or monitoring system, said wireless sensor network comprising a plurality of wireless sensor nodes wherein selected wireless sensor nodes have assigned roles in said wireless sensor network,characterised by determining a below threshold operating condition of a first wireless sensor node assigned to a role and re-assigning the role to a second wireless sensor node in said network,wherein the determining the below threshold operating condition comprises the first wireless sensor node determining the below threshold operating condition and the first wireless sensor node requesting the re-assignment with a release request to a network coordinator of said wireless sensor network, said network coordinator is a central node that receives said release request from said first wireless sensor node over said wireless sensor network, and said network coordinator in communication with said second wireless sensor node over said wireless sensor network,characterised by the network coordinator sending a role re-assign command to the second wireless sensor node and sending a role release confirmation to the first wireless sensor node.
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Abstract
A method for maintaining network lifetime of a wireless network in wireless communication system, the network including a plurality of device nodes. Selected ones of the wireless nodes have assigned roles in the wireless network. To improve and maintain network lifetime the method includes determining a below threshold operating condition of a first sensor node assigned to a first role and re-assigning the first role to another second node in said network. In other aspects of the invention a method, system and a computer program for carrying out the method are described.
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Citations
21 Claims
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1. A method for maintaining network lifetime of a wireless sensor network of an industrial control or monitoring system, said wireless sensor network comprising a plurality of wireless sensor nodes wherein selected wireless sensor nodes have assigned roles in said wireless sensor network,
characterised by determining a below threshold operating condition of a first wireless sensor node assigned to a role and re-assigning the role to a second wireless sensor node in said network, wherein the determining the below threshold operating condition comprises the first wireless sensor node determining the below threshold operating condition and the first wireless sensor node requesting the re-assignment with a release request to a network coordinator of said wireless sensor network, said network coordinator is a central node that receives said release request from said first wireless sensor node over said wireless sensor network, and said network coordinator in communication with said second wireless sensor node over said wireless sensor network, characterised by the network coordinator sending a role re-assign command to the second wireless sensor node and sending a role release confirmation to the first wireless sensor node.
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10. A wireless sensor node arranged for wireless communication in a wireless sensor network of an industrial control or monitoring system arranged for maintaining network lifetime of the wireless sensor network comprising a plurality of wireless sensor nodes, the wireless sensor node being able to be assigned a role,
characterised in that the wireless sensor node is arranged to determine a below threshold operating condition of the wireless sensor node, and to request a network coordinator to re-assign the role to another wireless sensor node defining a wireless sensor node in the wireless sensor network, said network coordinator a central node that receives a release request from said wireless sensor node over said wireless sensor network, and said network coordinator in communication with said another wireless sensor node over said wireless sensor network, characterised by the network coordinator sending a role re-assign command to the another wireless sensor node and sending a role release confirmation to the wireless sensor node.
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14. A method for using a wireless sensor node for communicating data between wireless sensor nodes connected in a wireless sensor network of an industrial control system or a process control system, the wireless sensor node being able to be assigned a role,
the method comprising the steps of: -
determining a below threshold operating condition of the wireless sensor node, and requesting a network coordinator to re-assign the role to another wireless sensor node defining a wireless sensor node in the wireless sensor network, said network coordinator a central node that receives a release request from said wireless sensor node over said wireless sensor network and said network coordinator in communication with said another wireless sensor node over said wireless sensor network, characterised by the network coordinator sending a role re-assign command to the another wireless sensor node and sending a role release confirmation to the wireless sensor node.
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15. A computer program comprising software code portions or computer code executing on a computer or processor to carry out the steps of a method for maintaining network lifetime of a wireless sensor network of an industrial control or monitoring system, said wireless sensor network comprising a plurality of wireless sensor nodes wherein selected wireless sensor nodes have assigned roles in said wireless sensor network,
characterised by determining a below threshold operating condition of a first wireless sensor node assigned to a role and re-assigning the role to a second wireless sensor node in said network, wherein the determining the below threshold operating condition comprises the first wireless sensor node determining the below threshold operating condition and the first wireless sensor node requesting the re-assignment with a release request to a network coordinator of said wireless sensor network, said network coordinator a central node that receives said release request from said first wireless sensor node over said wireless sensor network and said network coordinator in communication with said second wireless sensor node over said wireless sensor network, characterised by the network coordinator sending a role re-assign command to the second wireless sensor node and sending a role release confirmation to the first wireless sensor node.
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16. A computer program product with software code portions or computer code stored on a non-transitory computer usable medium, comprising computer readable program means for causing a computer to carry out the steps of a method for maintaining network lifetime of a wireless sensor network of an industrial control or monitoring system, said wireless sensor network comprising a plurality of wireless sensor nodes wherein selected wireless sensor nodes have assigned roles in said wireless sensor network,
characterised by determining a below threshold operating condition of a first wireless sensor node assigned to a role and re-assigning the role to a second wireless sensor node in said network, wherein the determining the below threshold operating condition comprises the first wireless sensor node determining the below threshold operating condition and the first wireless sensor node requesting the re-assignment with a release request to a network coordinator of said wireless sensor network, said network coordinator a central node that receives said release request from said first wireless sensor node over said wireless sensor network, and said network coordinator in communication with said second wireless sensor node over said wireless sensor network, characterised by the network coordinator sending a role re-assign command to the second wireless sensor node and sending a role release confirmation to the first wireless sensor node.
Specification