(19)

(11)

EP 1 142 221 A1

(12)

(43) Date of publication: 10.10.2001 Bulletin 2001/41 (21) Application number: 99960968.8 (22) Date of filing: 10.11.1999

(51) International Patent Classification (IPC)7: H04L 12/56, H04L 12/46, H04Q 7/38, H04Q 7/24, H04L 29/06, H04L 12/28 (86) International application number: PCT/EP9908/644 (87) International publication number: WO 0038/374 (29.06.2000 Gazette 2000/26)

(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: 22.12.1998 EP 98124518 (71) Applicant: Telefonaktiebolaget L M Ericsson (Publ) 126 25 Stockholm (SE)	(72) Inventors: KELLER, Ralf D-52146 Würselen (DE) LOHMAR, Thorsten D-52062 Aachen (DE) NIEBERT, Norbert D-52074 Aachen (DE) (74) Representative: Mohsler, Gabriele  Ericsson Eurolab Deutschland GmbH,Patent Department,Ericsson Allee 1 52134 Herzogenrath 52134 Herzogenrath (DE)