Abstract: A device which enables different spreading factors while preserving a comnmon scrambling code, in particular for transmission in a code division multiple access cellular mobile radio system. The device including a grouper for grouping the various data symbols of a kth incoming sequence (k=1, . . . , K) into different blocks of QMAX/QK symbols, and a spreader for spreading K incoming sequences with K respective spreading codes of respective length Qk (k=1, . . . , K) which is a sub-multiple of a maximum length QMAX, wherein the spreader spreads the blocks from the kth incoming sequence (k=1, . . . , K) with the corresponding code of length Qk to obtain a spread sequence including different spread blocks of length QMAX. The device further includes a scrambler for scrambling each of the K spread sequences obtained in this way using a scrambling code of length QMAX.

Abstract: During allocation of time slots of a UMTS frame to a terminal, the UMTS network provides a continuous gap having a duration at least equal to 5 ms in a UMTS frame to enable the receiver of the terminal to measure the power of any GSM signals received and to prepare for possible handover by pre-synchronizing to an adjoining GSM cell.

Abstract: Method of allocating orthogonal codes in a code division multiple access mobile radio system using codes of variable length which are generated in such a way that they can be represented in the form of a tree, said method including, in response to a code allocation request, a first step of determining, in accordance with the tree capacity used, corresponding to codes already allocated, and the tree capacity required, corresponding to the code allocation requested, if such allocation is possible.