METHOD FOR SYNCHRONIZING A FRAME IN A MMR NETWORK

摘要

A method for synchronizing a frame in an MMR(Mobile Multi-hop Relay) network is provided to transmit the preamble for synchronization to the lower radio station for the preamble reception section without receiving an additional preamble by performing the frame synchronization using a CP(Cycle Prefix) of the frame after securing the frame synchronization by using the preamble of the frame. In the MMR system using the OFDM modulation, a repeater station(RS) queues to the frame start point(S200). The repeater station grasps whether the motive using the preamble is required(S210). If the motive using the preamble is required, the preamble is received and the frame synchronization is modified(S220). The CP is used to receive the OFDM symbols(S230). If the repeater station does not require the synchronization using the preamble, the repeater station transmits the preamble to the lower radio station or queues. The frame synchronization is modified and the OFDM symbols are received by using the CP(S250).