Patent ID: 6275487
Filing Date: 2001-08-14
Classification: H04W,Y02D

Abstract:
A BCCH carrier transmitted by a base station of a digital cellular mobile radio system to a plurality of mobile stations, said BCCH carrier being segmented temporally into successive frames of fixed duration, each of said frames being itself divided into a particular number N.sub.IT of time slots, said BCCH carrier supporting a physical BCCH itself carrying at least one logical BCCH, said logical BCCH transmitting general signaling information known as BCCH information, each mobile station, for which the base station transmitting said BCCH carrier is an adjoining base station, having at least one monitoring window in each of at least N.sub.T successive frames, where N.sub.T.gtoreq.1 such as at least N.sub.F successive monitoring windows for receiving said BCCH carrier in particular, each monitoring window enabling the mobile station concerned to receive at least N.sub.E time slots of said BCCH carrier, where N.sub.E.gtoreq.1, wherein said BCCH carrier supports at least N.sub.R physical BCCH transmitted at constant power and consisting in the recurrence in each frame of N.sub.R time slots known as BCCH time slots said physical BCCH or each of said N.sub.R physical BCCH carries at least said logical BCCH, said BCCH time slot or each of said N.sub.R BCCH time slots containing said BCCH information at least once in N.sub.T successive frames, the number and the spacing of said N.sub.R BCCH time slot or time slots are such that said BCCH information is entirely received in said monitoring window or one of said at least N.sub.F successive monitoring windows of each mobile station, and time slots other than said N.sub.R BCCH time slots are transmitted with a power that can be controlled.