Patent ID: 8175109
Filing Date: 2012-05-08
Classification: H04W,Y02D

Abstract:
1. A beaconless communication method between nodes in a communication system, said communication system comprising at least two nodes, the method comprising: listening to a communication channel by a destination node periodically during reception slots using a receiver of the destination node, wherein a listen duration is T transmitting a wake-up signal before a payload data transmission from a source node to said destination node via said communication channel using a transmitter of the source node, wherein said wake-up signal contains a preamble and a control information, a duration of a signal block formed by said preamble and said control information is T in said communication system, the communication between said nodes is controlled based on said control information, said control information indicates a subsequent time point at which said source node starts the payload data transmission and said destination node receiving said control information starts the listening to the communication channel, the transmitter of the source node does not transmit signals between a last bit of the payload data transmission and a next wake-up signal subsequent to the last bit of the payload data transmission, and the receiver of the destination node does not listen to the communication channel between a reception slot and the subsequent time point, the subsequent time point indicated in the control information of the wake-up signal received by the destination node during the reception slot and the subsequent time point identifying a time at which the destination node starts the listening to the communication channel for reception of the payload data transmission.