Integrated circuit for controlling selection of random access preamble sequence

摘要

A sequence allocating method and apparatus wherein in a system where a plurality of different Zadoff-Chu sequences or GCL sequences are allocated to a single cell, the arithmetic amount and circuit scale of a correlating circuit at a receiving end can be reduced. In ST201, a counter (a) and a number (p) of current sequence allocations are initialized, and in ST202, it is determined whether the number (p) of current sequence allocations is coincident with a number (K) of allocations to one cell. In ST203, it is determined whether the number (K) of allocations to the one cell is odd or even. If K is even, in ST204-ST206, sequence numbers (r=a and r=N−a), which are not currently allocated, are combined and then allocated. If K is odd, in ST207-ST212, for sequences that cannot be paired, one of sequence numbers (r=a and r=N−a), which are not currently allocated, is allocated.

主权项

1. An integrated circuit to control a process performed at a mobile station, the process comprising:
receiving information related to a set of sequences configured to be available in a cell for use by the mobile station, the information being broadcasted from a base station; selecting a sequence from the set of sequences available in the cell; and random-access-preamble-transmitting the selected sequence; wherein the set of sequences available in the cell includes a sequence of r=a and a sequence of r=N−a, where r is a sequence number, a is an integer, and N is a sequence length, and the allocated sequences are defined by the following equation or an equation cyclic shifted from the following equation:cr⁡(k)=exp⁢{-j⁢2⁢⁢π⁢⁢rN⁢(k⁡(k+1)2+qk)} where k=0, 1, 2, . . . N−1, and q is an integer, and the sequence of r=a and the sequence of r=N−a are conjugate to each other.