Patent ID: 8699712
Filing Date: 2014-04-15
Classification: H04L,H04W

Abstract:
1. A method for encoding a Slow Associated Control Channel, SACCH, information block in a wireless network, the method comprising: randomizing a plurality of randomization unit input, R-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; wherein the pseudo-random bit block is determined based on at least a ciphering key Kc; ciphering a plurality of ciphering unit input, C-INPUT, bits derived from the 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 the ciphering key Kc and a frame number COUNT of the SACCH frame; and determining the pseudo-random bit block using a second frame number which is different from the frame number COUNT of the SACCH frame, wherein the second frame number is a frame number of a Traffic Channels (TCH) frame preceding the SACCH frame.