Method and apparatus for retransmitting packet for low-power wireless sensor communications
First Claim
1. A method of retransmitting a packet for low-power wireless sensor communications, the method comprising:
- receiving packets from sensor devices during Guaranteed Time Slots (GTSs) of a Contention Free Period (CFP), wherein each of the sensor devices is allocated a GTS;
checking, in each of the received packets, whether there is an error;
generating, according to results of the error checking, a GTS Bulk acknowledgement (ACK) frame that contains ACK information to be transmitted to the respective sensor devices; and
transmitting the generated GTS Bulk ACK frame to the sensor devices during a beacon transmission time slot within a Contention Access Period (CAP) offset, wherein the GTS Bulk ASK is transmitted either in a packet different from the beacon or in the beacon.
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Accused Products
Abstract
A method of retransmitting a packet for low-power wireless sensor communications of a coordinator in a sensor network is provided. The method includes receiving packets from a plurality of sensor devices during a plurality of guaranteed time slots (GTSs) of a Contention Free Period (CFP) which are allocated to the respective sensor devices; checking whether there is an error in each of the received packets; generating one GTS Bulk ACK frame that contains pieces of ACK information to be transmitted to the respective sensor devices, according to the error check results; and transmitting the generated GTS Bulk ACK frame to the plurality of sensor devices.
12 Citations
17 Claims
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1. A method of retransmitting a packet for low-power wireless sensor communications, the method comprising:
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receiving packets from sensor devices during Guaranteed Time Slots (GTSs) of a Contention Free Period (CFP), wherein each of the sensor devices is allocated a GTS; checking, in each of the received packets, whether there is an error; generating, according to results of the error checking, a GTS Bulk acknowledgement (ACK) frame that contains ACK information to be transmitted to the respective sensor devices; and transmitting the generated GTS Bulk ACK frame to the sensor devices during a beacon transmission time slot within a Contention Access Period (CAP) offset, wherein the GTS Bulk ASK is transmitted either in a packet different from the beacon or in the beacon. - View Dependent Claims (2, 3, 4, 5)
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6. A method of retransmitting a packet for low-power wireless sensor communications, the method comprising:
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receiving a Guaranteed Time Slot (GTS) Bulk acknowledgement (ACK) frame containing ACK information transmitted to each of a plurality of devices during a beacon transmission time slot within a Contention Access Period (CAP) offset, wherein the GTS Bulk ASK is transmitted either in a packet different from the beacon or in the beacon; checking the received GTS Bulk ACK frame, and determining whether packet retransmission is required; and in response to a determination that packet retransmission is required, retransmitting a corresponding packet during an allocated GTS within a Contention Free Period (CFP) offset. - View Dependent Claims (7, 8, 9)
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10. An apparatus for retransmitting a packet for low-power wireless sensor communications, the apparatus comprising:
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a packet receiver configured to receive packets transmitted from sensor devices during Guaranteed Time Slots (GTSs) of a Contention Free Period (CFP) offset, wherein each of the sensor devices is allocated a GTS; an error checker, executed by a processor, configured to check, in each of the received packets, whether there is an error; an acknowledgement (ACK) generator configured to, in response to a result of an error check, generate a GTS Bulk ACK frame containing ACK information to be transmitted to each of the sensor devices; and an ACK transmitter configured to transmit the generated GTS Bulk ACK frame to the sensor devices during a beacon transmission time slot within a Contention Access Period (CAP) offset, wherein the GTS Bulk ASK is transmitted either in a packet different from the beacon or in the beacon. - View Dependent Claims (11, 12, 13)
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14. An apparatus for retransmitting a packet for low-power wireless sensor communications, the apparatus comprising:
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an acknowledgement (ACK) receiver configured to receive a Guaranteed Time Slot (GTS) Bulk ACK frame containing ACK information transmitted to each of a plurality of devices during a beacon transmission time slot within a Contention Access Period (CAP) offset, wherein the GTS Bulk ASK is transmitted either in a packet different from the beacon or in the beacon; a checker, executed by a processor, configured to check the received GTS Bulk ACK frame, and determine whether packet retransmission is required; and a re-transmitter configured to, in response to a determination that packet retransmission is required, retransmit a corresponding packet during an allocated GTS within a Contention Free Period (CFP) offset. - View Dependent Claims (15, 16, 17)
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Specification