Coordinator's data transmission method, device's data reception method, coordinator using the coordinator's data transmission method, and device using the device's data reception method in zigbee system
First Claim
1. A data transmission method of a coordinator in a Zigbee system which includes at least one device and the coordinator for coordinating the at least one device, wherein the coordinator transmits data to the at least one device in a direct transmission method in a case where a frame pending bit in a beacon frame is determined to be a value representing the direct transmission method, the data transmission method comprising:
- generating the beacon frame having an address of a device to receive the data and a data transmission time; and
transmitting the data at the data transmission time.
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Abstract
A coordinator'"'"'s data transmission method, a device'"'"'s data reception method, a coordinator using the coordinator'"'"'s data transmission method and a device using the device'"'"'s data reception method are provided. In a Zigbee system including at least one device and a coordinator for coordinating the device, in a case where a frame pending bit in a beacon frame is determined to be a value representing a direct transmission method, a beacon frame containing an address of a device to receive data and a data transmission time is generated and data is transmitted from the coordinator at the data transmission time. Data transmission time and power consumption can be reduced.
37 Citations
8 Claims
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1. A data transmission method of a coordinator in a Zigbee system which includes at least one device and the coordinator for coordinating the at least one device, wherein the coordinator transmits data to the at least one device in a direct transmission method in a case where a frame pending bit in a beacon frame is determined to be a value representing the direct transmission method, the data transmission method comprising:
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generating the beacon frame having an address of a device to receive the data and a data transmission time; and
transmitting the data at the data transmission time. - View Dependent Claims (2, 3, 4)
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5. A data reception method, in which a device receives data from a coordinator, in a Zigbee system including at least one device and a coordinator for coordinating the at least one device and transmitting and receiving the data, the data reception method comprising:
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checking by the device whether a received beacon frame contains information of existence of data to be received by the device and a data transmission time; and
keeping a state of the device as RX_ON at the data transmission time if the device realizes the existence of data. - View Dependent Claims (6)
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7. A coordinator for coordinating at least one device in a Zigbee system, the coordinator comprising:
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a coordinator transmitter which provides a communication interface between the at least one device and the coordinator;
a beacon frame generator which generates a beacon frame containing an address of each device to receive data; and
a coordinator controller which sequentially transmits data to the at least one device according to a recording order of addresses.
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8. A device for receiving data from a coordinator in a Zigbee system, the device comprising:
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a device transmitter which provides a communication interface between the coordinator and the device;
a slot counter which counts data transmission slots allocated to all devices in the Zigbee system based on beacon frames and confirms a data transmission order;
a data request command generator which generates a data request command in a case where the device is compatibly used with an indirect transmission system; and
a device controller which keeps a state of the device as RX_ON in turn according to the data transmission order.
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Specification