(19)

(11)

EP 1 157 519 A1

(12)

(43) Date of publication: 28.11.2001 Bulletin 2001/48 (21) Application number: 00913203.6 (22) Date of filing: 21.02.2000

(51) International Patent Classification (IPC)7: H04L 29/06 (86) International application number: PCT/SE0000/344 (87) International publication number: WO 0051/307 (31.08.2000 Gazette 2000/35)

(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: 26.02.1999 US 258427 (71) Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ) 126 25 Stockholm (SE)	(72) Inventors: HARTMAN, Magnus S-118 23 Stockholm (SE) SVANBRO, Krister S-973 43 Lule (SE) OLIN, Birgitta S-167 65 Bromma (SE) (74) Representative: HOFFMANN - EITLE  Patent- und RechtsanwälteArabellastrasse 4 81925 München 81925 München (DE)