SC needs to know the service in progress to determine suitable cells to direct the call to the BSC will provide the MS with mapping parameters, which will enable the MS to obtain the set of most suitable cells for the measurement report the BSC may provide the MS with the Q search parameters to trigger measurement of other radio access technologies; a separate bit may be used to indicate whether the UMTS measurements are triggered when the GSM RXLEV measurement for the current cell is below or above Q search in GSM to UMTS handover, it is the working assumption that the source GSM BSC shall provide the ID of the target RNC; it is also assumed that the source RNC to target RNC transparent container will be created by the BSC in order to optimize non-synchronized ('blind') handover, the GSM BSC shall pro- vide additional information about the target cell (e.g. scrambling code, synchroni- zation) 4. UMTS RNC the RNC will broadcast the parameter M-offset on its BCCH; this offset is set by the network, and is used to adjust the comparison of UMTS with GSM measure- ments UMTS measurements from GSM MS The requirements on the measurements made by the MS are: measurement on UTRAN cells by the MS will not have a significant impact on the measurement ability and performance of the MS for support of GSM to GSM han- dover; it is assumed that the MS uses search frames for UTRAN measurements and that the UTRAN cells are only monitored during idle search frames the maximum time for detecting a new suitable UTRAN cell relates to the number of UTRAN frequencies under monitoring the time it takes to detect, confirm BSIC and report a new suitable GSM cell ap- plies also for detecting and reporting a new suitable UTRAN cell when one UTRAN frequency remains under monitoring the UE, when in connected mode, does not need to read BCCH on the UTRAN cells under measurement the operator will be able to provide the UE with information that enables the UE to activate the actual physical measurements only when considered needed; e.g. when the 