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EP 0 927 481 A1

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(43) Date of publication: 07.07.1999 Bulletin 1999/27 (21) Application number: 97945245.0 (22) Date of filing: 19.09.1997

(51) International Patent Classification (IPC):  H04L 25/ 34( . ) H04L 25/ 49( . ) (86) International application number: PCT/US1997/016936 (87) International publication number: WO 1998/013977 (02.04.1998 Gazette 1998/13)

(84) Designated Contracting States: DE FR GB NL SE (30) Priority: 25.09.1996 US 19960026688P 15.10.1996 US 19960730434 13.11.1996 US 19960747840 (71) Applicant: MOTOROLA, INC. Schaumburg, IL 60196 (US)	(72) Inventors: EYUBOGLU, M., Vedat Concord, MA 01742 (US) HUMBLET, Pierre, A. F-06400 Cannes (FR) (74) Representative: Potts, Susan Patricia, et al  Motorola European Intellectual Property Operations Midpoint Alencon Link Basingstoke, Hampshire RG21 7PL Basingstoke, Hampshire RG21 7PL (GB)