WIRELESS SENSOR NETWORK WITH LINEAR STRUCTURE BEING CAPABLE OF BIDIRECTIONAL COMMUNICATION AND METHOD THEREOF
First Claim
1. A wireless sensor network comprising a plurality of nodes linearly connected from a sink node to a terminal node by connecting each node to a single upper-level node and a single lower-level node,wherein each node has an active period for transmitting/receiving data to/from its upper-level node and lower-level node, andwherein the active period includes a downstream duration for transmitting data/commands from the sink node to the terminal node and an upstream duration for transmitting data/commands from the terminal node to the sink node,so that bidirectional communication between the sink node and the terminal node can be performed within a single active period.
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Accused Products
Abstract
Disclosed is a wireless sensor network with a linear structure capable of bidirectional communication. The wireless sensor network includes a plurality of nodes linearly connected from a sink node to a terminal node by connecting each node to a single upper-level node and a single lower-level node, each node has an active period for transmitting/receiving data to/from its upper-level node and lower-level node, the active period includes a downstream duration for transmitting data/commands from the sink node to the terminal node and an upstream duration for transmitting data/commands from the terminal node to the sink node, and each of the upstream and downstream durations sequentially includes RX, TX, and ACK intervals, so that bidirectional communication between the sink node and the terminal node can be performed within a single active period.
28 Citations
13 Claims
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1. A wireless sensor network comprising a plurality of nodes linearly connected from a sink node to a terminal node by connecting each node to a single upper-level node and a single lower-level node,
wherein each node has an active period for transmitting/receiving data to/from its upper-level node and lower-level node, and wherein the active period includes a downstream duration for transmitting data/commands from the sink node to the terminal node and an upstream duration for transmitting data/commands from the terminal node to the sink node, so that bidirectional communication between the sink node and the terminal node can be performed within a single active period.
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5. A wireless sensor network comprising a plurality of nodes linearly connected from a sink node to a terminal node by connecting each node to a single upper-level node and a single lower-level node,
wherein an active period and an inactive period each of which has a predetermined time length are sequentially repeated in each node; -
wherein the active period sequentially includes a downstream duration for transmitting data/commands from the sink node to the terminal node, an intermission duration, and an upstream duration for transmitting data/commands from the terminal node to the sink node; and wherein each of the downstream duration and the upstream duration sequentially includes a receive (RX) interval, a transmit (TX) interval, and an acknowledgement (ACK) interval, so that bidirectional communication between the sink node and the terminal node can be performed within a single active period.
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6. A wireless sensor network comprising a plurality of nodes linearly connected from a sink node to a terminal node by connecting each node to a single upper-level node and a single lower-level node,
wherein an active period and an inactive period each of which has a predetermined time length are sequentially repeated in each node; -
wherein the active period sequentially includes a upstream duration for transmitting data/commands from the terminal node to the sink node, an intermission duration, and an downstream duration for transmitting data/commands from the sink node to the terminal node; and wherein each of the downstream duration and the upstream duration sequentially includes a receive (RX) interval, a transmit (TX) interval, and an acknowledgement (ACK) interval, so that bidirectional communication between the sink node and the terminal node can be performed within a single active period. - View Dependent Claims (7, 8)
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9. A method of transmitting/receiving bidirectional data in a wireless sensor network having a plurality of nodes connected in a linear manner from a sink node to a terminal node, wherein an active period of each node includes a downstream duration for transmitting data/commands from the sink node to the terminal node, and an upstream duration for transmitting data/commands from the terminal node to the sink node, the method comprising:
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(a1) each node receiving data/commands from its upper-level node and transmitting the data/commands to its lower-level node during the downstream duration; and (a2) each node receiving data/commands from its lower-level node and transmitting the data/commands to its parent node during the upstream duration, so that bidirectional communication of data/commands between the sink node and the terminal node can be performed within a single active period. - View Dependent Claims (10, 11, 12, 13)
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Specification