(19)

(11)

EP 1 151 580 A1

(12)

(43) Date of publication: 07.11.2001 Bulletin 2001/45 (21) Application number: 00906806.5 (22) Date of filing: 18.01.2000

(51) International Patent Classification (IPC)7: H04L 12/28 (86) International application number: PCT/SE0000/085 (87) International publication number: WO 0046/959 (10.08.2000 Gazette 2000/32)

(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: 05.02.1999 SE 9900397 (71) Applicant: TELEFONAKTIEBOLAGET LM ERICSSON 126 25 Stockholm (SE)	(72) Inventors: NORDENSTAM, Jan, Olof S-136 53 Handen (SE) HANSSON, Allan S-116 24 Stockholm (SE) (74) Representative: Hedman, Anders et al Aros Patent ABP.O. Box 1544 751 45 Uppsala 751 45 Uppsala (SE)