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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Accused Products
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.
25 Citations
12 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, 5)
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6. A data reception method, in which a device receives data from a coordinator, in a Zigbee system including at least one device and the coordinator for coordinating the at least one device, wherein the data received by the at least one device is transmitted by the coordinator 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 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 (7, 8)
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9. 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. - View Dependent Claims (10)
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11. 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. - View Dependent Claims (12)
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Specification