Redundant wireless node network with coordinated receiver diversity
First Claim
Patent Images
1. A wireless network comprising:
- multiple first wireless nodes that transmit signals;
multiple independent infrastructure nodes that receive the transmitted signals, wherein at least two infrastructure nodes receive a transmitted signal from a single first wireless node; and
a module that combines at least two of the signals received at the multiple independent infrastructure nodes to estimate the signal transmitted by the single first wireless node.
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Abstract
A network of wireless nodes transmit electromagnetic signals, typically in the radio frequency (RF) mode, or at other frequencies. Multiple infrastructure nodes pick up the signals transmitted by each wireless node. The signals are combined to estimate the actual signal transmitted by the wireless node, such as a leaf node sensor. Many different diversity techniques may be used to combine the signals. In one embodiment, maximal ratio combining, equal gain combining, selection combining or switching combining is used to combine the signals.
127 Citations
23 Claims
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1. A wireless network comprising:
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multiple first wireless nodes that transmit signals;
multiple independent infrastructure nodes that receive the transmitted signals, wherein at least two infrastructure nodes receive a transmitted signal from a single first wireless node; and
a module that combines at least two of the signals received at the multiple independent infrastructure nodes to estimate the signal transmitted by the single first wireless node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An infrastructure node for a wireless network, the infrastructure node comprising:
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a first receiver that receives a transmitted signal from a wireless node;
a second receiver that receives signals from other independent infrastructure nodes representative of the transmitted signal from the wireless node that were received by the other independent infrastructure nodes; and
a module that combines signal received from the wireless node and the signals from the other independent infrastructure nodes to estimate the signal transmitted by the wireless node. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A infrastructure node for a wireless network, the infrastructure node comprising:
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means for receiving a transmitted signal from a wireless node;
means for receiving the signals from other independent infrastructure nodes representative of the transmitted signal from the wireless node; and
means for combining the signal received from the wireless node and the signals from the other independent infrastructure nodes to estimate the signal transmitted by the wireless node.
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17. A wireless network comprising:
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means for transmitting low power wireless signals;
multiple means for receiving the transmitted signals, wherein at least two of such means receive a transmitted signal from a single first wireless node; and
means for combining at least two of the signals received at the multiple means for receiving the transmitted signals for estimating the signal transmitted by the single first wireless node.
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18. A method of processing signals at a infrastructure node for a wireless network, the infrastructure node performing the method comprising:
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receiving a transmitted signal from a wireless node;
receiving the signals from other independent infrastructure nodes representative of the transmitted signal from the wireless node; and
combining the signal received from the wireless node and the signals from the other independent infrastructure nodes to estimate the signal transmitted by the wireless node.
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19. A method of processing signals in a network having multiple independent infrastructure nodes and multiple nodes, the method comprising:
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transmitting a signal from a first wireless node;
receiving the transmitted signal, wherein at least two infrastructure nodes receive the transmitted signal from the single first wireless node; and
combining the signals received by at least two of the multiple independent infrastructure nodes to estimate the signal transmitted by the single first wireless node. - View Dependent Claims (20, 21, 22, 23)
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Specification