公开(公告)号：JP2001313968A

公开(公告)日：2001-11-09

申请号：JP2001071319

申请日：2001-03-14

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BHATOOLAUL DAVID LAHIRI ,  CAO QIANG ,  CHARRIERE PATRICK GEORGE V ,  LIM SEAU SIAN

IPC: H04J13/00 ,  H04B7/26 ,  H04J3/00 ,  H04M3/00 ,  H04W36/08 ,  H04W52/00 ,  H04W52/04 ,  H04W74/08 ,  H04Q7/22 ,  H04Q7/28

Abstract: PROBLEM TO BE SOLVED: To provide a method for operating a cellular mobile radiotelephone network characterized by including a step to perform a request to service from a mobile set, and a step to demodulate the burst of a message and then to passe the demodulated data to a radiotelephone network controller(RNC). SOLUTION: When the mobile set performs a handover within a cellular system, first, the mobile set searches a best cell to which it can be connected, next tries to transmit a message to the found best cell. In a CDMA cellular system, a likelihood to be received successfully by a cell having the random access channel(RACH) message of the mobile set is largely dependent on sending power. The cellular mobile radiotelephone network is disclosed. As a characteristic, the mobile set requests service by a format related to a first cell in which the mobile set is located by using data modulated on one common RACH. A base station in a cell adjacent to the first cell is composed so that the burst of the RACH message having the format related to the first cell is demodulated and the demodulated data are passed to the RNC. Thereby, mean power required for successfully transmitting the RACH message can be reduced.