Patent ID: 8077631

Claim:
A method for transmitting uplink data in a coaxial network which comprise a Coaxial Line Terminal (CLT), a plurality of a Coaxial Network Unit (CNU) and a branch for connecting the CLT and the CNU, comprising: determining, by the CNU, a transmission path loss in a CLT-CNU direction according to a receiving level of the CNU and a downlink transmission level adopted by the CLT; determining, by the CNU, a transmission level for transmitting uplink data according to the transmission path loss; and transmitting, by the CNU, the uplink data to the CLT through the branch by using the transmission level; wherein the transmission level for transmitting uplink data is higher than the transmission path loss in CLT-CNU direction but lower than level isolating amplitude of the branch to make the branch transmit the uplink data only to the CLT and not to another CNU, wherein the determining the transmission level for transmitting the uplink data according to the transmission path loss comprises: determining the transmission level for transmitting the uplink data according to a sum of the transmission path loss, a receiving level of the CLT and an adjusting level, the adjusting level meeting a following condition: a difference between the transmission level for transmitting the uplink data determined according to the adjusting level and a path loss between the CNU and the branch is not higher than the level isolating amplitude of the branch.