Patent ID: 6771670
Filing Date: 2004-08-03
Classification: H04B,H04W

Abstract:
A time-alignment apparatus of a receiver of a telecommunication system for receiving successive data frames on a plurality of channels, wherein said respective data frames on said channels are not time-aligned, and for outputting said data frames of all channels time-aligned to a common synchronisation clock, comprising:a) at least a first, second and third read/write frame memory for respectively storing one data frame of each of said channels, said frame memories each having a write state in which data is written to said frame memories by an input means and a read state in which data is read from said frame memories by an output means; and b) a control unit for cyclically switching said three frame memories through a first to third alignment mode synchronized to said common synchronisation clock such that b1) in said first alignment mode said first and second frame memory are in a write state and said third frame memory is in a read state; b2) in said second alignment mode said second and third frame memory are in a write state and said first frame memory is in a read state; b3) in said third alignment mode said third and first frame memory are in a write state and said second frame memory is in a read state; b4) wherein after each mode switching a newly arriving data frame of any channel is always written to a frame memory which was in a read state in the previous mode; and b5) wherein data frames are always read from the frame memory having a read state time-aligned to said common synchronization clock.