A METHOD OF DETECTING THE RANDOM ACCESS COLLISION OF MULTI-USER EQUIPMENT

摘要

The invention relate to a method of detecting the random access collision of user equipment (UE), which apply to a mobile communication system consisted of base station and a group of UE, the base station and UE use N orthogonal or quasi-orthogonal pseudo-random sequence as a group to perform random access. The detecting method includes: the base station perform the correlation operation to the random access signal received at the same moment with each pseudo-random sequence in order, obtain the related correlation window; and find out the biggest correlation peak value in the correlation result window, then partition the correlation peak value window and edge window; setting a threshold, compare it with the correlation result in the edge window of the correlation peak value window and correlation result window not including the correlation peak value window, when the condition is met, it is determined that more than one user equipment use the pseudo-random sequence attended in the correlation operation of the correlation result window to perform random access, then exist the access collision problem for two or more than two UE select the same pseudo-random sequence in the same frame to access the same base station.