| 摘要 |
The present invention relates to a method for transmitting data in a downlink of a wireless communication system configured by a primary coordinator and a plurality of terminals connected through one or more hops. The present invention firstly synchronizes a system using a periodically transmitted beacon signal, and transmits a signal using a dynamic super frame structure in which a management frame and a data frame are configured in each beacon interval. The management frame transmits and receives a control message required for system management, minimizes the power consumption by making only devices exchanging data transmit and receive data while the other devices stop a transmission and reception function. Further, the present invention can facilitate multi-hop downlink data transmission through a transfer/return process of data frame use. Meanwhile, the present invention can improve reliability of control message transmission through repeated transmission of a beacon signal and a data request message in the management frame. Further, the present invention starts the data transmission only when the channel is empty after configuring a packet length to be used in the data frame and sensing a channel, thereby improving data transmission performance in an interference environment. |
