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(11)

EP 1 133 854 A1

(12)

(43) Date of publication: 19.09.2001 Bulletin 2001/38 (21) Application number: 99958570.6 (22) Date of filing: 08.11.1999

(51) International Patent Classification (IPC)7: H04L 12/58, H04L 29/06, H04L 12/22 (86) International application number: PCT/SE9902/021 (87) International publication number: WO 0031/931 (02.06.2000 Gazette 2000/22)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 24.11.1998 US 198822 (71) Applicant: Telefonaktiebolaget L M Ericsson (Publ) 126 25 Stockholm (SE)	(72) Inventor: GEHRMANN, Christian S-126 47 Hägersten (SE) (74) Representative: HOFFMANN - EITLE  Patent- und RechtsanwälteArabellastrasse 4 81925 München 81925 München (DE)