Interrogation method in a wireless packet data by way of averaging of the system

摘要

PURPOSE:To efficiently house traffic and to enable completely duplex communication. CONSTITUTION:A host station 11 continuously transmits the slot of a rated time length composed of a polling frame Pxx and a down data frame Ixx. After an up date frame Dxx is received at a slave station under up communication, individual polling is successively and repeatedly executed according to the polling frame Pxx while separating the data frame for more than a prescribed time interval. Unspecified polling is executed to the unspecified slave station according to a polling frame Po not to execute this individual polling. Regardless of the polling frame Pxx, the down data frame Ixx is repeatedly transmitted to the slave station under down communication. The polling frame Pxx and the down data frame Ixx are transmitted to the slave station under bidirectional communication of up and down by the same slot while separating them for more than the prescribed time interval. The slave station transmits a polling request or the up data frame Dxx to the polling frame Pxx from the host station 11 while separating it for more than the prescribed time interval.