Randomisierung von Volltext für Gsm Sacch

Details

Veröffentlichungs-Nr.

EP2566096

Aktenzeichen

EP12181556

Anmeldetag

23. August 2012

Veröffentlichung

18. März 2020

Erteilung

18. März 2020

Rechtsraum

EP

IPC

H04L9/06H04L9/00

Abstract

The present document relates to the transmission of data in a digital cellular telecommunications network. In particular, the present document relates to the secure transmission of data over Global System for Mobile Communications (GSM) networks. A method for encoding a SACCH information block in a wireless network is described. The method comprises randomizing a plurality of randomization unit input bits derived from at least some of a plurality of payload bits of the SACCH information block using a pseudo-random bit block, thereby yielding a plurality of randomized bits; and ciphering a plurality of ciphering unit input bits derived from at least some of the plurality of randomized bits, thereby yielding an encoded data burst of a SACCH frame; wherein ciphering is based on a ciphering algorithm using a ciphering key Kc and a frame number COUNT of the SACCH frame; wherein the pseudo-random bit block is determined based on the ciphering key Kc.

Anmelder

Firmen

BlackBerry Limited
Research In Motion Limited

Land

🇨🇦 Kanada

Fachgebiete