(19)

(11)

EP 1 216 552 A1

(12)

(43) Date of publication: 26.06.2002 Bulletin 2002/26 (21) Application number: 00963226.6 (22) Date of filing: 13.09.2000

(51) International Patent Classification (IPC)7: H04L 12/56, H04L 12/64, H04Q 11/04 (86) International application number: PCT/SE0001/766 (87) International publication number: WO 0120/858 (22.03.2001 Gazette 2001/12)

(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: 16.09.1999 US 397072 (71) Applicant: Telefonaktiebolaget L M Ericsson (Publ) 126 25 Stockholm (SE)	(72) Inventors: FLORIN, Hakan S-116 43 Stockholm (SE) FRIMAN, Erik S-113 24 Stockholm (SE) PETERSEN, Lars-Göran S-147 42 Tumba (SE) (74) Representative: Hammar, Ernst  Albihns Stockholm AB,Box 5581 114 85 Stockholm 114 85 Stockholm (SE)