METHODS AND ARRANGEMENTS IN A RADIO COMMUNICATIONS SYSTEM

摘要

A method for synchronising communication of framed data via asynchronous base stations in a cellular communications system, is performed continuously by sending out system frame counter states from a central node in the system to its connected base stations. Each base station comprises a local frame counter which generates local frame counter states correlated to the system frame counter states. Transmission of information via the base stations is synchronised by assigning each data frame a frame number, given by the local frame counter states so that data frames having identical numbers contain copies of a certain data packet.