Patent ID: 9641289
Date: 2017-05-02
CPC Classifications: H04J,H04L,H04W

Claim:
1. A data transmission method, comprising: selecting, by a coordinator, a prescribed channel and a spare channel, and generating channel selection information, wherein the prescribed channel is used to re-transmit data that a node fails to transmit on another channel, and the spare channel is used to re-transmit data that the node fails to transmit on the prescribed channel; dividing a contention free period (CFP) of a superframe into three son contention free periods (SCFPs), and generating timeslot division information, wherein the three SCFPs comprise a first SCFP, a second SCFP, and a third SCFP; the second SCFP is used to re-transmit data that the node fails to transmit in the first SCFP; the third SCFP is used to re-transmit data that the node fails to transmit in the second SCFP; and an allocated timeslot position of the node in the first SCFP is the same as in the second SCFP, wherein when the node fails to transmit data in the allocated timeslot position in the first SCFP, the node re-transmits the data in the same allocated timeslot position in the second SCFP; broadcasting a beacon frame on the prescribed channel in a beacon period of the superframe, wherein the beacon frame comprises the channel selection information and the timeslot division information; and receiving data that the node transmits based on the channel selection information and the timeslot division information, and transmitting an acknowledgement frame.