Patent ID: 6725058
Filing Date: 2004-04-20
Classification: H04W

Abstract:
Method for use in making a handover decision between two mobile telecommunications systems using distinct radio access technologies, comprising the steps of:transmitting a pilot signal (18) from a base station (11) of a first radio access technology (RAT) (12) used in a first mobile telecommunications system on a carrier having a frequency (f1) used by a second RAT (14) used in a second mobile telecommunications system, and receiving (22) said pilot signal in a dual-system mobile station (10) capable of operating in both said first mobile telecommunications system using said first RAT and in said second mobile telecommunications system using said second RAT for evaluating (26) said pilot signal for determining (36, 46) whether to carry out an intersystem handover from operating said mobile station in said second mobile telecommunications system using said second RAT to operating said mobile station in said first telecommunications system using said first RAT wherein said pilot signal contains information indicative of configuration parameters needed by said dual-system mobile station (10) to operate in the first RAT.