ECONOMICAL SYNCHRONIZATION SYSTEM FOR ASYNCHRONOUS TRANSFER MODE MOBILE COMMUNICATION NETWORK WITHOUT DEPENDENCE ON EXTERNAL SYSTEM

摘要

An asynchronous transfer mode network includes a high-level station (23) and amobile station (24) in a boundary zone between service cells of wireless base stations(21,22) connected to the high-level station through asynchronous transfer modechannels (25,26), wherein the high level station transmit a control message (MG1)through the asynchronous transfer mode channels (25,26) and the wireless base stations(21,22) to the mobile station (24) and receives response messages(MG2,MG3,MG4,MG5) from the mobile station (24) through the wireless base stations(21,22) and the asynchronous transfer mode channels (25,26), and determines adifference between transmission time lags along asynchronous transfer mode channels(25,26) so as to make built-in clocks (21a,22a) provided for the wireless base stations(21,22) synchronous with one another.