Importance

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Abstract

A method of establishing a communication path in a sensor network, the sensor network having a tree structure comprising a plurality of root nodes representative of access point devices in said sensor network, and at least one non-root node representative of a sensor device in said sensor network, wherein each node in said sensor network is associated with a rank value determining its position relative to other nodes, such that said non-root node has higher rank value than said root node, the method comprising forwarding a control message from each root node in a subset of said plurality of root nodes, the control message comprising a tree size value associated with said each root node in said subset, the tree size value defining the number of non-root nodes associated with each root node in said subset; and upon reception of said control message, selecting one of said root nodes in said subset to establish a communication path between said at least one non-root node, based on said tree size values of said root nodes in said subset, such that tree sizes of said each root node in said subset is substantially balanced relative to each other.

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First Claim