Patent ID: 7675884
Filing Date: 2010-03-09
Classification: H04L,H04W

Abstract:
1. An apparatus for communication scheduling, the apparatus comprising: a control unit which determines whether a reference node and a plurality of child nodes of the reference node have completed communication scheduling, which is required for performing communication between the reference node and the plurality of the child nodes during a time period; a scheduling unit which performs communication scheduling between the reference node and a parent node of the reference node by selecting a communication time if the control unit determines that the reference node and the plurality of the child nodes have completed the communication scheduling; and a sensor unit which senses a control packet if the reference node transmits the control packet to a first child node of the plurality of child nodes, so that a second child node of the plurality of child nodes located at a level equal to that of the first child node of the plurality of child nodes can notify the reference node that the second child node of the plurality of child nodes has not performed the communication scheduling with the reference node, wherein the sensor unit senses whether the control packet has been transmitted by using a Carrier Sense Multiple Access/ID Countdown (CSMA/IC) protocol.