METHOD AND TRANSMISSION SYSTEM FOR THE SIGNALLING OF A CARRIER FREQUENCY

摘要

Method and transmission system for the signalling of a carrier frequency The present invention provides a possible way of signalling digitally a carrier frequency which is used at a predetermined instant after the signalling. The invention can be used in particular in a so-called multiframe mode of a mobile part (2) of a digital transmission system, in a multiframe mode the mobile station (2) receiving data from a fixed station (1) only during so-called multiframe frames in order to be able to resynchronized with the fixed station (1) in an energy-saving manner. A multiframe frame is in this case provided after every (m-1) frames of the transmission. The carrier frequency (fx) used by the fixed station (1) in the next multiframe frame is in this case signalled to the mobile station (2) by means of the bits which correspond to bits of the header of the A field of the DECT standard. According to the invention, as a result of the initially effected signalling and synchronization of the carrier frequencies (fx) of the multiframe frames as the first step, it is then possible for the carrier frequency synchronization with regard to the frames between two successive multiframe frames to be carried out.