End node and network coordinator using a CSMA based protocol
First Claim
1. A node comprising:
- a transceiver provided for communication with a network coordinator, wherein the transceiver handles a transmission channel based on CSMA;
a processing unit provided for processing data received via the transmission channel; and
wherein the node is arranged to performsending recurrently a data request packet,going to a low power mode after sending the data request packet, andwaking-up for receiving a data response packet a predefined time interval after beginning sending the data request packet;
wherein the node comprises a network address and data packets comprises a destination address, wherein the node is further arranged to perform;
deriving the destination address from a data packet;
going to lower power mode when the destination address differs from the network address; and
,waking-up for receiving the data response packet at regular time instants, wherein the interval between the regular time instants corresponds to the predefined time interval.
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Abstract
A communication protocol based on CSMA between a node, in particular an electronic label, and a network coordinator is disclosed. The node comprises:—a transceiver provided for communication with a network coordinator, wherein the transceiver handles a transmission channel based on CSMA;—a processing unit provided for processing data received via the transmission channel and displaying the data on a display unit. The electronic label is arranged to perform:—sending recurrently a data request packet;—going to a low power mode after sending the data request packet; and—waking-up for receiving a data response packet a predefined time interval after beginning sending the data request packet. The network coordinator is arranged to transmit the data response packet the predefined time interval after receiving the beginning of the data request packet. The invention provides a protocol based on CSMA with very low power operation in which a multitude of end nodes could receive from a network coordinator their corresponding data.
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Citations
19 Claims
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1. A node comprising:
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a transceiver provided for communication with a network coordinator, wherein the transceiver handles a transmission channel based on CSMA; a processing unit provided for processing data received via the transmission channel; and wherein the node is arranged to perform sending recurrently a data request packet, going to a low power mode after sending the data request packet, and waking-up for receiving a data response packet a predefined time interval after beginning sending the data request packet; wherein the node comprises a network address and data packets comprises a destination address, wherein the node is further arranged to perform; deriving the destination address from a data packet; going to lower power mode when the destination address differs from the network address; and
,waking-up for receiving the data response packet at regular time instants, wherein the interval between the regular time instants corresponds to the predefined time interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system including a network coordinator for communication with a multitude of node, and a node of the multitude of node,
the network coordinator comprising: -
a transceiver provided for communication with the node, wherein the transceiver handles a transmission channel based on CSMA; a processing unit provided for processing data received via the transmission channel and acquiring data to be transmitted to the node by means of a data response packet; and wherein the network coordinator is arranged to perform receiving a data request packet sent by the node, preparing a data response packet comprising instructions to be transmitted to the node, and transmitting the data response packet a predefined time interval after receiving the beginning of the data request packet; the node comprising; a transceiver provided for communication with the network coordinator, wherein the transceiver handles a transmission channel based on CSMA; a processing unit provided for processing data received via the transmission channel; and wherein the node is arranged to perform sending recurrently a data request packet, going to a low power mode after sending the data request packet, and waking-up for receiving a data response packet a predefined time interval after beginning sending the data request packet; wherein the node comprises a network address and data packets comprises a destination address, wherein the node is further arranged to perform; deriving the destination address from a data packet; going to lower power mode when the destination address differs from the network address; and
,waking-up for receiving the data response packet at regular time instants, wherein the interval between the regular time instants corresponds to the predefined time interval. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification