Method and apparatus for efficient data broadcast within beaconing network
First Claim
1. A wireless communication system comprising a child node and a parent node, wherein the improvement comprises:
- when a first packet is transmitted from the child node to the parent node based on an IEEE 802.15.4/ZigBee standard, the child node transmitting the first packet to the parent node by way of point-to-point transmission, and when a second packet is transmitted from the parent node to the child node based on the IEEE 802.15.4/ZigBee standard, the parent node transmitting a synchronization signal with a specified flag periodically for connection maintenance and synchronous control, and the child node receiving the second packet, transmitted by way of broadcasting, from the parent node in response to the synchronization signal with the specified flag set to one;
wherein the child node sends a request signal to the parent node for re-transmitting the second packet as the child node fails to receive the second packet in a certain period after receiving the synchronization signal, andwherein the parent node re-transmits the second packet to the child node by way of point-to-point transmission in response to the request signal.
1 Assignment
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Accused Products
Abstract
A wireless communication apparatus, system, method and computer readable medium therefor for transmission between a parent node and a child node are provided. The child node transmits a first packet to the parent node via point-to-point transmission. When the parent node tries to transmit a second packet to the child node, a synchronization signal is transmitted first and then the second packet is transmitted to the child node via broadcast transmission after a certain period. If the child node fails to receive the second packet during the certain period, the child node sends a signal to the parent node. The parent node re-transmits the second packet to the child node via point-to-point transmission.
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Citations
20 Claims
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1. A wireless communication system comprising a child node and a parent node, wherein the improvement comprises:
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when a first packet is transmitted from the child node to the parent node based on an IEEE 802.15.4/ZigBee standard, the child node transmitting the first packet to the parent node by way of point-to-point transmission, and when a second packet is transmitted from the parent node to the child node based on the IEEE 802.15.4/ZigBee standard, the parent node transmitting a synchronization signal with a specified flag periodically for connection maintenance and synchronous control, and the child node receiving the second packet, transmitted by way of broadcasting, from the parent node in response to the synchronization signal with the specified flag set to one; wherein the child node sends a request signal to the parent node for re-transmitting the second packet as the child node fails to receive the second packet in a certain period after receiving the synchronization signal, and wherein the parent node re-transmits the second packet to the child node by way of point-to-point transmission in response to the request signal. - View Dependent Claims (2, 3, 4, 5)
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6. A communication device for wireless communicating with a parent node and a child node, wherein:
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when a first packet is transmitted from the communication device to the parent node based on an IEEE 802.15.4/ZigBee standard, the communication device transmits the first packet to the parent node by way of point-to-point transmission, and when a second packet is transmitted from the communication device to the child node based on the IEEE 802.15.4/ZigBee standard, the communication device transmits a first synchronization signal with a specified flag periodically for connection maintenance and synchronous control, and transmits the second packet, in response to the synchronization signal with the specified flag set to one, to the child node after a certain period by way of broadcasting; wherein the communication device re-transmits the second packet by way of point-to-point transmission as the communication device receives a second request signal from the child node for re-transmitting the second packet. - View Dependent Claims (7, 8, 9, 10)
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11. A wireless communication method between a child node and a parent node, the method comprising the steps of:
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transmitting a first packet from the child node to the parent node by way of point-to-point transmission when the first packet needs to be transmitted to the parent node based on an IEEE 802.15.4/ZigBee standard; transmitting a synchronization signal with a specified flag periodically from the parent node to the child node for connection maintenance and synchronous control when a second packet needs to be transmitted to the child node based on the IEEE 802.15.4/ZigBee standard; receiving the second packet, transmitted by way of broadcasting, by the child node in response to the synchronization signal with the specified flag set to one; sending a request signal to the parent node by the child node for re-transmitting the second packet as the child node fails to receive the second packet in a certain period after receiving the synchronization signal; and re-transmitting the second packet to the child node by way of point-to-point transmission by the parent node in response to the request signal. - View Dependent Claims (12, 13, 14, 15)
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16. A non-transitory computer-readable medium, storing a computer program to perform a wireless communication method between a child node and a parent node based on an IEEE 802.15.4/ZigBee standard, the method comprising the steps of:
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transmitting a first packet from the child node to the parent node by way of point-to-point transmission when the first packet needs to be transmitted to the parent node based on an IEEE 802.15.4/ZigBee standard; transmitting a synchronization signal with a specified flag periodically from the parent node to the child node for connection maintenance and synchronous control when a second packet needs to be transmitted to the child node based on the IEEE 802.15.4/ZigBee standard; receiving the second packet, transmitted by way of broadcasting, by the child node in response to the synchronization signal with the specified flag set to one; sending a request signal to the parent node by the child node for re-transmitting the second packet as the child node fails to receive the second packet in a certain period after receiving the synchronization signal; and re-transmitting the second packet to the child node by way of point-to-point transmission by the parent node in response to the request signal. - View Dependent Claims (17, 18, 19, 20)
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Specification