(19)

(11)

EP 1 088 424 A2

(12)

(88) Date of publication A3: 16.03.2000 (43) Date of publication: 04.04.2001 Bulletin 2001/14 (21) Application number: 99931648.2 (22) Date of filing: 14.05.1999

(51) International Patent Classification (IPC)7: H04L 12/24 (86) International application number: PCT/SE9900/815 (87) International publication number: WO 9965/187 (16.12.1999 Gazette 1999/50)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 12.06.1998 SE 9802110 (71) Applicant: Telefonaktiebolaget L M Ericsson (Publ) 126 25 Stockholm (SE)	(72) Inventors: HANSEN, Niels, Qvistgaard DK-2100 Copenhagen (DK) JAKOBSEN, Tony, Thisted DK-2450 Copenhagen (DK) (74) Representative: Wideberg, Olle Sven  Ericsson Telecom AB,IPR Management and Patent Department 126 25 Stockholm 126 25 Stockholm (SE)