Power efficient wireless system for sensor network
First Claim
1. A power efficient wireless system for a sensor network comprising:
- a) at least one access point including a processor and a transceiver for transmitting signals to and receiving signals from a plurality of sensor nodes, b) a plurality of sensor nodes each including a processor and a transceiver for receiving signals from the access point and transmitting data packets to the access point, and c) a communication network including wireless one hop broadcast of downlink signals from the access point to the plurality of sensor nodes, and transmission of uplink signals from the plurality of sensor nodes to the access point through a plurality of channels using time division multiple access and assigned to the sensor nodes by the access point using a scheduling mechanism.
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Accused Products
Abstract
A power efficient system architecture that exploits the characteristics of sensor networks in order to decrease the power consumption in the network. The primary characteristic of sensor networks is that the destination of all the data packets in the network is a central data collector and this central data collector, which is usually denoted as access point (AP), has unlimited transmission power and energy whereas the sensor nodes have limited battery energy and transmission power. The system uses the AP to directly synchronize and explicitly schedule the nodes'"'"' transmissions over Time Division Multiple Access (TDMA) time slots.
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Citations
19 Claims
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1. A power efficient wireless system for a sensor network comprising:
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a) at least one access point including a processor and a transceiver for transmitting signals to and receiving signals from a plurality of sensor nodes, b) a plurality of sensor nodes each including a processor and a transceiver for receiving signals from the access point and transmitting data packets to the access point, and c) a communication network including wireless one hop broadcast of downlink signals from the access point to the plurality of sensor nodes, and transmission of uplink signals from the plurality of sensor nodes to the access point through a plurality of channels using time division multiple access and assigned to the sensor nodes by the access point using a scheduling mechanism. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A power efficient wireless system for a sensor network comprising:
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a) a plurality of sensor nodes each including a transceiver, b) at least one access point including a transceiver for transmitting signals to and receiving signals from the plurality of sensors, c) a communication network for communication between the sensor nodes and the access point, wherein the access point determines a communication schedule for the sensor using time division multiple access uplink channels from the sensors to the access point based on neighbor and interferer information received from each sensor node. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of controlling a wireless system for communicating between a plurality of sensor nodes each including a sensor, a processor, and a transceiver and an access point including a processor and a transceiver having more power than each of the sensor nodes, said method comprising:
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a) the access point transmitting in one hop to all sensor nodes a coordination packet and a tree construction packet, b) each sensor node responding to the access point using carrier sense multiple access with neighbor and interferer information, and c) said access point responding to received neighbor and interferer information by assigning time division multiple access channels to the sensor nodes whereby the sensor nodes have a sleep mode except during the assigned time division channel. - View Dependent Claims (14, 15)
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16. A traffic control radio communication system comprising:
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a) a plurality of nodes each including a vehicle detection sensor, b) an access point coupled to the plurality of nodes for gathering information on the node network and broadcasting periodic schedules to the nodes for listening, transmitting data using a carrier sense multiple access (CSMA) protocol, and sleeping, and c) a communication link of the plurality of nodes to the access point. - View Dependent Claims (17, 18, 19)
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Specification